Catalyst 2950 Desktop Switch Command Reference, 12.1(11)YJ
Cisco IOS Commands - a through r
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Cisco IOS Commands

Table Of Contents

Cisco IOS Commands

aaa authentication dot1x

access-list (IP extended)

access-list (IP standard)

archive download-sw

archive tar

archive upload-sw

auto qos voip

boot boothlpr

boot buffersize

boot config-file

boot enable-break

boot helper

boot helper-config-file

boot manual

boot private-config-file

boot system

channel-group

class

class-map

clear controllers ethernet-controller

clear controllers lre

clear controllers lre link monitor

clear controllers lre log

clear interface

clear lre rate selection

clear mac address-table

clear pagp

clear port-security dynamic

clear port-security sticky

clear spanning-tree detected-protocols

clear vmps statistics

clear vtp counters

cluster commander-address

cluster discovery hop-count

cluster enable

cluster holdtime

cluster management-vlan

cluster member

cluster run

cluster standby-group

cluster timer

controller LongReachEthernet

cpe duplex

cpe protected

cpe shutdown

cpe speed

cpe type

define interface-range

delete

deny (access-list configuration)

deny (MAC access-list configuration)

dot1x default

dot1x max-req

dot1x multiple-hosts

dot1x port-control

dot1x re-authenticate

dot1x re-authentication

dot1x timeout quiet-period

dot1x timeout re-authperiod

dot1x timeout tx-period

duplex

errdisable detect

errdisable recovery

flowcontrol

hw-module slot module-slot # upgrade lre

interface

interface port-channel

interface range

ip access-group

ip access-list

ip address

ip igmp snooping

ip igmp snooping vlan

ip igmp snooping vlan immediate-leave

ip igmp snooping vlan mrouter

ip igmp snooping vlan static

link monitor

link monitor logging

link monitor threshold rserr

link monitor threshold snr

local duplex

local speed

logging lre

lre profile

lre rate selection sequence

lre sequence

lre upgrade default family device-family binary

mac access-group

mac access-list extended

mac address-table aging-time

mac address-table notification

mac address-table static

margin

match

media-type

mls qos cos

mls qos map

mls qos trust

monitor session

mvr

mvr immediate

mvr type

mvr vlan group

pagp learn-method

pagp port-priority

permit (access-list configuration)

permit (MAC access-list configuration)

persistence

police

policy-map

port-channel load-balance

profile (interface mode)

profile (sequence mode)

rate selection

rate selection profile lock

rate selection sequence

rcommand

remote-span

rmon collection stats


Cisco IOS Commands


aaa authentication dot1x

Use the aaa authentication dot1x global configuration command to specify one or more authentication, authorization, and accounting (AAA) methods for use on interfaces running IEEE 802.1X. Use the no form of this command to disable authentication.

aaa authentication dot1x {default} method1 [method2...]

no aaa authentication dot1x {default} method1 [method2...]

Syntax Description

default

Use the listed authentication methods that follow this argument as the default list of methods when a user logs in.

method1 [method2...]

At least one of these keywords:

enable—Use the enable password for authentication.

group radius—Use the list of all Remote Authentication Dial-In User Service (RADIUS) servers for authentication.

line—Use the line password for authentication.

local—Use the local username database for authentication.

local-case—Use the case-sensitive local username database for authentication.

none—Use no authentication. The client is automatically authenticated by the switch without using the information supplied by the client.


Defaults

No authentication is performed.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The method argument identifies the list of methods that the authentication algorithm tries in the given sequence to validate the password provided by the client. The only method that is truly 802.1X-compliant is the group radius method, in which the client data is validated against a RADIUS authentication server. The remaining methods enable AAA to authenticate the client by using locally configured data. For example, the local and local-case methods use the username and password that are saved in the IOS configuration file. The enable and line methods use the enable and line passwords for authentication.

If you specify group radius, you must configure the RADIUS server by entering the radius-server host global configuration command.

If you are not using a RADIUS server, you can use the local or local-case methods, which access the local username database to perform authentication. By specifying the enable or line methods, you can supply the clients with a password to provide access to the switch.

Use the show running-config privileged EXEC command to display the configured lists of authentication methods.

Examples

This example shows how to enable AAA and how to create an authentication list for 802.1X. This authentication first tries to contact a RADIUS server. If this action returns an error, the user is allowed access with no authentication.

Switch(config)# aaa new model
Switch(config)# aaa authentication dot1x default group radius none

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

Command
Description

aaa new-model

Enables the AAA access control model. For syntax information, refer to Cisco IOS Security Command Reference for Release 12.1 > Authentication, Authorization, and Accounting > Authentication Commands.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


access-list (IP extended)

Use the extended version of the access-list global configuration command to configure an extended IP access control list (ACL). Use the no form of the command to remove an extended IP ACL.

access-list access-list-number {deny | permit | remark} protocol {source source-wildcard | host source | any} [operator port] {destination destination-wildcard | host destination | any} [operator port] [dscp dscp-value] [time-range time-range-name]

no access-list access-list-number

This command is available on physical interfaces only if your switch is running the enhanced software image (EI).

Syntax Description

access-list-number

Number of an ACL, from 100 to 199 or from 2000 to 2699.

protocol

Name of an IP protocol.

protocol can be ip, tcp, or udp.

deny

Deny access if conditions are matched.

permit

Permit access if conditions are matched.

remark

ACL entry comment up to 100 characters.

source source-wildcard | host source | any

Define a source IP address and wildcard.

The source is the source address of the network or host from which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The source-wildcard applies wildcard bits to the source.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for source and source-wildcard of source 0.0.0.0.

The keyword any as an abbreviation for source and source-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a source-wildcard.

destination destination-wildcard | host destination | any

Define a destination IP address and wildcard.

The destination is the destination address of the network or host to which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The destination-wildcard applies wildcard bits to the destination.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for destination and destination-wildcard of destination 0.0.0.0.

The keyword any as an abbreviation for destination and destination-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a destination-wildcard.

operator port

(Optional) Define a source or destination port.

The operator can be only eq (equal).

If operator is after the source IP address and wildcard, conditions match when the source port matches the defined port.

If operator is after the destination IP address and wildcard, conditions match when the destination port matches the defined port.

The port is a decimal number or name of a Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) port. The number can be from 0 to 65535.

Use TCP port names only for TCP traffic.

Use UDP port names only for UDP traffic.

dscp dscp-value

(Optional) Define a Differentiated Services Code Point (DSCP) value to classify traffic.

For the dscp-value, enter any of the 13 supported DSCP values (0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56), or use the question mark (?) to see a list of available values.

time-range time-range-name

(Optional) For the time-range keyword, enter a meaningful name to identify the time range. For a more detailed explanation of this keyword, refer to the software configuration guide.


Defaults

The default extended ACL is always terminated by an implicit deny statement for all packets.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Plan your access conditions carefully. The ACL is always terminated by an implicit deny statement for all packets.

You can use ACLs to control virtual terminal line access by controlling the transmission of packets on an interface.

Extended ACLs support only the TCP and UDP protocols.

Use the show ip access-lists command to display the contents of IP ACLs.

Use the show access-lists command to display the contents of all ACLs.


Note For more information about configuring IP ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to configure an extended IP ACL that allows only TCP traffic to the destination IP address 128.88.1.2 with a TCP port number of 25 and how to apply it to an interface:

Switch(config)# access-list 102 permit tcp any host 128.88.1.2 eq 25
Switch(config)# interface fastethernet0/8
Switch(config-if)# ip access-group 102 in

This is an example of an extended ACL that allows TCP traffic only from two specified networks. The wildcard bits apply to the host portions of the network addresses. Any host with a source address that does not match the ACL statements is denied.

access-list 104 permit tcp 192.5.0.0 0.0.255.255 any
access-list 104 permit tcp 128.88.0.0 0.0.255.255 any

Note In these examples, all other IP access is implicitly denied.


You can verify your settings by entering the show ip access-lists or show access-lists privileged EXEC command.

Related Commands

Command
Description

access-list (IP standard)

Configures a standard IP ACL.

ip access-group

Controls access to an interface.

show access-lists

Displays ACLs configured on the switch.

show ip access-lists

Displays IP ACLs configured on the switch.


access-list (IP standard)

Use the standard version of the access-list global configuration command to configure a standard IP access control list (ACL). Use the no form of the command to remove a standard IP ACL.

access-list access-list-number {deny | permit | remark} {source source-wildcard | host source | any}

no access-list access-list-number

This command is available on physical interfaces only if your switch is running the enhanced software image (EI).

Syntax Description

access-list-number

Number of an ACL, from 1 to 99 or from 1300 to 1999.

deny

Deny access if conditions are matched.

permit

Permit access if conditions are matched.

remark

ACL entry comment up to 100 characters.

source source-wildcard | host source | any

Define a source IP address and wildcard.

The source is the source address of the network or host from which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The source-wildcard applies wildcard bits to the source.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for source and source-wildcard of source 0.0.0.0.

The keyword any as an abbreviation for source and source-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a source-wildcard.


Defaults

The default standard ACL is always terminated by an implicit deny statement for all packets.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Plan your access conditions carefully. The ACL is always terminated by an implicit deny statement for all packets.

You can use ACLs to control virtual terminal line access by controlling the transmission of packets on an interface.

Use the show ip access-lists command to display the contents of IP ACLs.

Use the show access-lists command to display the contents of all ACLs.


Note For more information about configuring IP ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to configure a standard IP ACL that allows only traffic from the host network 128.88.1.10 and how to apply it to an interface:

Switch(config)# access-list 12 permit host 128.88.1.10
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ip access-group 12 in

This is an example of an standard ACL that allows traffic only from three specified networks. The wildcard bits apply to the host portions of the network addresses. Any host with a source address that does not match the ACL statements is denied.

access-list 14 permit 192.5.34.0  0.0.0.255
access-list 14 permit 128.88.0.0  0.0.0.255
access-list 14 permit 36.1.1.0  0.0.0.255


Note In these examples, all other IP access is implicitly denied.


You can verify your settings by entering the show ip access-lists or show access-lists privileged EXEC command.

Related Commands

Command
Description

access-list (IP extended)

Configures an extended IP ACL.

ip access-group

Controls access to an interface.

show access-lists

Displays ACLs configured on the switch.

show ip access-lists

Displays IP ACLs configured on the switch.


archive download-sw

Use the archive download-sw privileged EXEC command to download a new image to the switch and to overwrite or to keep the existing image.

archive download-sw {/force-reload | /imageonly | /leave-old-sw | /no-set-boot | /overwrite | /reload | /safe} source-url

Syntax Description

/force-reload

Unconditionally force a system reload after successfully downloading the software image.

/imageonly

Download only the software image but not the HTML files associated with the Cluster Management Suite (CMS). The HTML files for the existing version are deleted only if the existing version is being overwritten or removed.

/leave-old-sw

Keep the old software version after a successful download.

/no-set-boot

Do not alter the setting of the BOOT environment variable to point to the new software image after it is successfully downloaded.

/overwrite

Overwrite the software image in Flash with the downloaded one.

/reload

Reload the system after successfully downloading the image unless the configuration has been changed and not been saved.

/safe

Keep the current software image; do not delete it to make room for the new software image before the new image is downloaded. The current image is deleted after the download.

source-url

The source URL alias for a local or network file system. These options are supported:

The syntax for the local Flash file system:
flash:

The syntax for the File Transfer Protocol (FTP): ftp:[[//username[:password]@location]/directory]/image-name.tar

The syntax for the Remote Copy Protocol (RCP): rcp:[[//username@location]/directory]/image-name.tar

The syntax for the Trivial File Transfer Protocol (TFTP): tftp:[[//location]/directory]/image-name.tar

The image-name.tar is the software image to download and install on the switch.


Defaults

Both the software image and HTML files are downloaded.

The new image is downloaded to the flash: file system.

The BOOT environment variable is changed to point to the new software image on the flash: file system.

Image names are case sensitive; the image file is provided in tar format.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Use the /overwrite option to overwrite the image on the Flash device with the downloaded one.

If the Flash device has sufficient space to hold two images and you want to overwrite one of these images with the same version, you must specify the /overwrite option.

If you specify the command without the /overwrite option, the download algorithm verifies that the new image is not the same as the one on the switch Flash device. If the images are the same, the download does not occur. If the images are different, the old image is deleted, and the new one is downloaded.

The /imageonly option removes the HTML files for the existing image if the existing image is being removed or replaced. Only the IOS image (without the HTML files) is downloaded.

Using the /safe or /leave-old-sw option can cause the new image download to fail if there is insufficient Flash space.

If you used the /leave-old-sw option and did not overwrite the old image when you downloaded the new one, you can remove the old image by using the delete privileged EXEC command. For more information, see the "delete" section.

If you leave the existing software in place before downloading the new image, an error results if the existing software prevents the new image from fitting onto Flash memory.

After downloading a new image, enter the reload privileged EXEC command to begin using the new image, or specify the /reload or /force-reload option in the archive download-sw command.

Examples

This example shows how to download a new image from a TFTP server at 172.20.129.10 and to overwrite the image on the switch:

Switch# archive download-sw /overwrite tftp://172.20.129.10/test-image.tar 

This example shows how to download only the software image from a TFTP server at 172.20.129.10 to the switch:

Switch# archive download-sw /image-only tftp://172.20.129.10/test-image.tar 

This example shows how to keep the old software version after a successful download:

Switch# archive download-sw /leave-old-sw tftp://172.20.129.10/test-image.tar 

Related Commands

Command
Description

archive tar

Creates a tar file, lists the files in a tar file, or extracts the files from a tar file.

archive upload-sw

Uploads an existing image on the switch to a server.

delete

Deletes a file or directory on the Flash memory device.


archive tar

Use the archive tar privileged EXEC command to create a tar file, to list files in a tar file, or to extract the files from a tar file.

archive tar {/create destination-url flash:/file-url} | {/table source-url} | {/xtract source-url flash:/file-url}

Syntax Description

/create destination-url flash:/file-url

Create a new tar file on the local or network file system.

For destination-url, specify the destination URL alias for the local or network file system and the name of the tar file to create. These options are supported:

The syntax for the local Flash filesystem:
flash:

The syntax for the File Transfer Protocol (FTP): ftp:[[//username[:password]@location]/directory]/tar-filename.tar

The syntax for the Remote Copy Protocol (RCP) is: rcp:[[//username@location]/directory]/tar-filename.tar

The syntax for the Trivial File Transfer Protocol (TFTP): tftp:[[//location]/directory]/tar-filename.tar

The tar-filename.tar is the tar file to be created.

For flash:/file-url, specify the location on the local Flash file system from which the new tar file is created.

An optional list of files or directories within the source directory can be specified to write to the new tar file. If none are specified, all files and directories at this level are written to the newly created tar file.

/table source-url

Display the contents of an existing tar file to the screen.

For source-url, specify the source URL alias for the local or network file system. These options are supported:

The syntax for the local Flash file system:
flash:

The syntax for the File Transfer Protocol (FTP) ftp:[[//username[:password]@location]/directory]/tar-filename.tar

The syntax for the Remote Copy Protocol (RCP): rcp:[[//username@location]/directory]/tar-filename.tar

The syntax for the Trivial File Transfer Protocol (TFTP): tftp:[[//location]/directory]/tar-filename.tar

The tar-filename.tar is the tar file to display.

/xtract source-url flash:/file-url

Extract files from a tar file to the local or network file system.

For source-url, specify the source URL alias for the local or network file system. These options are supported:

The syntax for the local Flash file system:
flash:

The syntax for the File Transfer Protocol (FTP): ftp:[[//username[:password]@location]/directory]/tar-filename.tar

The syntax for the Remote Copy Protocol (RCP): rcp:[[//username@location]/directory]/tar-filename.tar

The syntax for the Trivial File Transfer Protocol (TFTP): tftp:[[//location]/directory]/tar-filename.tar

The tar-filename.tar is the tar file from which to extract.

For flash:/file-url, specify the location on the local Flash file system into which the tar file is extracted.

An optional list of files or directories within the tar file can be specified for extraction. If none are specified, all files and directories are extracted.


Defaults

None

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames and directory names are case sensitive.

Image names are case sensitive.

Examples

This example shows how to create a tar file. The command writes the contents of the new-configs directory on the local Flash device to a file named saved.tar on the TFTP server at 172.20.136.9:

Switch# archive tar /create tftp:172.20.136.9/saved.tar flash:/new-configs

This example shows how to display the contents of the saved.tar file that is in Flash memory. The contents of the tar file appear on the screen:


Switch # archive tar /table tftp://172.20.136.9/saved.tar
Loading saved.tar from 172.20.136.9 (via Vlan1):!
info (247 bytes)
c2950lre-i6l2q4-mz.121/ (directory)
c2950lre-i6l2q4-mz.121/html/ (directory)
c2950lre-i6l2q4-mz.121/html/homepage.htm (3990 bytes)!
c2950lre-i6l2q4-mz.121/html/not_supported.html (1392 bytes)
c2950lre-i6l2q4-mz.121/html/common.js (9449 bytes)!!
c2950lre-i6l2q4-mz.121/html/cms_splash.gif (22062 bytes)!!!!!
c2950lre-i6l2q4-mz.121/html/cms_13.html (1211 bytes)
c2950lre-i6l2q4-mz.121/html/cluster.html (2823 bytes)!
c2950lre-i6l2q4-mz.121/html/Redirect.jar (4226 bytes)!
c2950lre-i6l2q4-mz.121/html/c4v4_disc.sgz (11131 bytes)!!
c2950lre-i6l2q4-mz.121/html/CMS.sgz (1178465
bytes)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!
c2950lre-i6l2q4-mz.121/html/CiscoChartPanel.sgz (57732 bytes)!!!!!!!!!!!!
c2950lre-i6l2q4-mz.121/html/cms_boot.jar (40976 bytes)!!!!!!!!
c2950lre-i6l2q4-mz.121/c2950lre-i6l2q4-mz.121.bin (2769508
bytes)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!
c2950lre-i6l2q4-mz.121/lre-bin/ (directory)
c2950lre-i6l2q4-mz.121/lre-bin/CISCO2950-LRE_vdsloctl_02.50.00.bin (33480
bytes)!!!!!!!
c2950lre-i6l2q4-mz.121/lre-bin/CISCO2950-LRE_vdsloctl_02.51.00.bin (33480
bytes)!!!!!!!
c2950lre-i6l2q4-mz.121/lre-bin/CISCO2950-LRE_vdsloctl_02.60.00.bin (33480
bytes)!!!!!!
c2950lre-i6l2q4-mz.121/lre-bin/CISCO575-LRE_vdslsngl_50.00.00.bin (8896
bytes)!!
c2950lre-i6l2q4-mz.121/lre-bin/CISCO585-LRE_MC8051appl_01.02.00.bin (688
bytes)!
c2950lre-i6l2q4-mz.121/lre-bin/CISCO585-LRE_MC8051appl_01.03.00.bin (688
bytes)
c2950lre-i6l2q4-mz.121/lre-bin/CISCO585-LRE_MC8051boot_01.02.00.bin (688
bytes)
c2950lre-i6l2q4-mz.121/lre-bin/CISCO585-LRE_MC8051boot_01.03.00.bin (688
bytes)
c2950lre-i6l2q4-mz.121/lre-bin/CISCO585-LRE_vdslsngl_51.00.00.bin (8896
bytes)!!
c2950lre-i6l2q4-mz.121/pef22824.bin (32768 bytes)!!!!!!!
c2950lre-i6l2q4-mz.121/info (247 bytes)
info.ver (247 bytes)
[OK - 4279808/8559616 bytes]


Related Commands

Command
Description

archive download-sw

Downloads a new image to the switch.

archive upload-sw

Uploads an existing image on the switch to a server.


archive upload-sw

Use the archive upload-sw privileged EXEC command to upload an existing switch image to a server.

archive upload-sw [/version version_string] destination-url

Syntax Description

/version version_string

(Optional) Specify the specify version string of the image to be uploaded.

destination-url

The destination URL alias for a local or network file system. These options are supported:

The syntax for the local Flash file system:
flash:

The syntax for the File Transfer Protocol (FTP): ftp:[[//username[:password]@location]/directory]/image-name.tar

The syntax for the Remote Copy Protocol (RCP): rcp:[[//username@location]/directory]/image-name.tar

The syntax for the Trivial File Transfer Protocol (TFTP): tftp:[[//location]/directory]/image-name.tar

The image-name.tar is the name of software image to be stored on the server.


Defaults

Uploads the currently running image from the flash: file system.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

The upload feature is available only if the HTML files associated with the Cluster Management Suite (CMS) have been installed with the existing image.

The files are uploaded in this sequence: info, the IOS image, the HTML files, Long-Reach Ethernet (LRE) binary files and info.ver. After these files are uploaded, the software creates the tar file.

Image names are case sensitive.

Examples

This example shows how to upload the currently running image to a TFTP server at 172.20.140.2:


Switch# archive upload-sw tftp://172.20.140.2/test-image.tar 

Related Commands

Command
Description

archive download-sw

Downloads a new image to the switch.

archive tar

Creates a tar file, lists the files in a tar file, or extracts the files from a tar file.


auto qos voip

Use the auto qos voip interface configuration command to configure automatic quality of service (auto-QoS) for Voice over IP (VoIP) within a QoS domain. Use the no form of this command to change the auto-QoS default settings to the standard-QoS defaults.

auto qos voip {cisco-phone | trust}

no auto qos voip

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

cisco-phone

Identify this interface as connected to a Cisco IP Phone, and automatically configure QoS for VoIP. The QoS labels of incoming packets are trusted only when the phone is detected.

trust

Identify this interface as connected to a trusted switch or router. The QoS labels of incoming packets are trusted.


Defaults

Auto-QoS is disabled on all interfaces.

When auto-QoS is enabled, it uses the ingress packet label to categorize traffic, to assign Differentiated Services Code Point (DSCP) and class of service (CoS) packet labels, and to configure the egress queues as summarized in Table 2-1.

Table 2-1 Traffic Types, Ingress Packet Labels, Assigned Packet Labels, and Egress Queues

 
VoIP Data Traffic
VoIP Control Traffic
Routing Protocol Traffic
STP BPDU 1 Traffic
All Other Traffic

Ingress DSCP

46

26

-

-

-

Ingress CoS

5

3

6

7

-

Assigned DSCP

46

26

48

56

0

Assigned CoS

-

-

6

7

0

CoS-to-Queue Map

5

3, 4, 6, 7

0, 1, 2

Egress Queue

Expedite queue

80% WRR

20% WRR

1 BPDU = bridge protocol data unit


Table 2-2 lists the default auto-QoS configuration for the egress queues.

Table 2-2 Default Auto-QoS Configuration for the Egress Queues

Egress Queue
Queue Number
CoS-to-Queue Map
Queue Weight

Expedite

4

5

-

80% WRR

3

3, 4, 6, 7

80%

20% WRR

1

0, 1, 2

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Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)EA1

This command was introduced.


Usage Guidelines

Use this command to configure the QoS that is appropriate for VoIP traffic within the QoS domain. The QoS domain includes the switch, the interior of the network, and the edge devices that can classify incoming traffic for QoS.

Use the cisco-phone keyword on ports connected to Cisco IP Phones at the edge of the network. The switch detects the phone through the Cisco Discovery Protocol (CDP) and trusts the QoS labels in packets received from the phone.

Use the trust keyword on ports connected to the interior of the network. Because it is assumed that traffic has already been classified by other edge devices, the QoS labels in these packets from the interior of the network are trusted.

The first interface that you enable with the auto-QoS feature results in these automatic actions:

The standard-QoS defaults for the egress queues are replaced with the auto-QoS defaults. For more information, refer to the software configuration guide for this release.

The auto-QoS defaults for the egress queues are globally enabled on all interfaces.

The auto-QoS defaults for the CoS-to-DSCP map are globally configured on all interfaces.

When you enter the auto qos voip cisco-phone interface configuration command, the ingress classification on the interface is set to trust the CoS value received in the packet only if a Cisco IP Phone is detected.

When you enter the auto qos voip trust interface configuration command, the ingress classification on the interface is set to trust the CoS value received in the packet.

You can enable auto-QoS on static, dynamic-access, and voice-VLAN access ports.

The auto qos voip interface configuration command is mutually exclusive with interface ingress-classification commands. If you configure the auto qos voip command when the mls qos cos override, mls qos trust [cos | device cisco-phone | dscp], or service-policy interface configuration commands are configured, an error message appears, and the existing configuration remains in effect.

If you previously configured the egress queues and then enable auto-QoS, the pre-existing configuration remains in effect.

If auto-QoS is enabled and you enter the no form of a standard-QoS command to return to the default, the auto-QoS default settings become the default settings.

Examples

This example shows how to enable auto-QoS and to trust the QoS labels received in incoming packets when the switch or router connected to Gigabit Ethernet interface 0/1 is a trusted device:

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# auto qos voip trust

This example shows how to enable auto-QoS and to trust the QoS labels received in incoming packets when the device connected to Fast Ethernet interface 0/1 is detected and is a Cisco IP Phone:

Switch(config)# interface fastethernet0/1
Switch(config-if)# auto qos voip cisco-phone

You can verify your settings by entering the show auto qos voip interface interface-id privileged EXEC command.

Related Commands

Command
Description

mls qos cos

Defines the default CoS value of a port or assigns the default CoS to all incoming packets on the port.

mls qos map

Defines the CoS-to-DSCP map or the DSCP-to-CoS map.

mls qos trust

Configures the port trust state.

show auto qos

Displays auto-QoS information.

show mls qos interface

Displays QoS information at the interface level.


boot boothlpr

Use the boot boothlpr global configuration command to load a special IOS image, which when loaded into memory, can load a second IOS image into memory and start it. This variable is used only for internal development and testing. Use the no form of this command to return to the default setting.

boot boothlpr filesystem:/file-url

no boot boothlpr

Syntax Description

filesystem:

Alias for a Flash file system. Use flash: for the system board Flash device.

/file-url

The path (directory) and name of a bootable helper image.


Defaults

No helper image is loaded.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames and directory names are case sensitive.

This command changes the setting of the BOOTHLPR environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot buffersize

Use the boot buffersize global configuration command to specify the size of the file system-simulated nonvolatile RAM (NVRAM) in Flash memory. The buffer holds a copy of the configuration file in memory. Use the no form of this command to return to the default setting.

boot buffersize size

no boot buffersize

Syntax Description

size

The buffer allocation size in bytes. The range is 4096 to 524288 bytes.


Defaults

The default is 32 KB.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YP

This command was introduced.


Usage Guidelines

The configuration file cannot be larger than the buffer size allocation.

You must reload the switch by using the reload privileged EXEC command for this command to take effect.

This command changes the setting of the CONFIG_BUFSIZE environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot config-file

Use the boot config-file global configuration command to specify the filename that IOS uses to read and write a nonvolatile copy of the system configuration. Use the no form of this command to return to the default setting.

boot config-file flash:/file-url

no boot config-file

Syntax Description

flash:/file-url

The path (directory) and name of the configuration file.


Defaults

The default configuration file is flash:config.text.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames and directory names are case sensitive.

This command changes the setting of the CONFIG_FILE environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot enable-break

Use the boot enable-break global configuration command to enable interrupting the automatic boot process. Use the no form of this command to return to the default setting.

boot enable-break

no boot enable-break

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled. The automatic start up process cannot be interrupted by pressing the Break key on the console.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

When you enter this command, you can interrupt the automatic boot process by pressing the Break key on the console after the Flash file system is initialized.


Note Despite the setting of this command, you can interrupt the automatic boot process at any time by pressing the MODE button on the switch front panel.


This command changes the setting of the ENABLE_BREAK environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot helper

Use the boot helper global configuration command to dynamically load files during boot loader initialization to extend or to patch the functionality of the boot loader. Use the no form of this command to return to the default.

boot helper filesystem:/file-url ...

no boot helper

Syntax Description

filesystem:

Alias for a Flash file system. Use flash: for the system board Flash device.

/file-url

The path (directory) and a list of loadable files to dynamically load during loader initialization. Separate each image name with a semicolon.


Defaults

No helper files are loaded.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames and directory names are case sensitive.

This command changes the setting of the HELPER environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot helper-config-file

Use the boot helper-config-file global configuration command to specify the name of the configuration file to be used by the IOS helper image. If this is not set, the file specified by the CONFIG_FILE environment variable is used by all version of IOS that are loaded. This variable is used only for internal development and testing. Use the no form of this command to return to the default setting.

boot helper-config-file filesystem:/file-url

no boot helper-config file

Syntax Description

filesystem:

Alias for a Flash file system. Use flash: for the system board Flash device.

/file-url

The path (directory) and helper configuration file to load.


Defaults

No helper configuration file is specified.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames and directory names are case sensitive.

This command changes the setting of the HELPER_CONFIG_FILE environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot manual

Use the boot manual global configuration command to enable starting the switch manually during the next power on cycle. Use the no form of this command to return to the default setting.

boot manual

no boot manual

Syntax Description

This command has no arguments or keywords.

Defaults

The default is no boot manual.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

The next time you restart the system, the switch is in boot loader mode, which is shown by the switch: prompt. To power on the system, use the boot boot loader command, and specify the name of the bootable image.

This command changes the setting of the MANUAL_BOOT environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot private-config-file

Use the boot private-config-file global configuration command to specify the filename that IOS uses to read and write a nonvolatile copy of the private configuration. Use the no form of this command to return to the default setting.

boot private-config-file filename

no boot private-config-file

Syntax Description

filename

The name of the private configuration file.


Defaults

The default configuration file is private-config.text.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames are case sensitive.

Examples

This example shows how to specify the name of the private configuration file to be pconfig:

Switch(config)# boot private-config-file pconfig

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


boot system

Use the boot system global configuration command to specify the IOS image to load during the next power on cycle. Use the no form of this command to return to the default setting.

boot system filesystem:/file-url ...

no boot system

Syntax Description

filesystem:

Alias for a Flash file system. Use flash: for the system board Flash device.

/file-url

The path (directory) and name of a bootable image. Separate image names with a semicolon.


Defaults

The switch attempts to automatically power on the system by using information in the BOOT environment variable. If this variable is not set, the switch attempts to load and execute the first executable image it can by performing a recursive, depth-first search throughout the Flash file system. In a depth-first search of a directory, each encountered subdirectory is completely searched before the switch continues to search in the original directory.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Filenames and directory names are case sensitive.

If you are using the archive download-sw privileged EXEC command to maintain system images, you do not ever need to use the boot system command. The boot system command is automatically manipulated to load the downloaded image.

This command changes the setting of the BOOT environment variable. For more information, see "Boot Loader Commands."

Related Commands

Command
Description

show boot

Displays the settings of the boot environment variables.


channel-group

Use the channel-group interface configuration command to assign an Ethernet interface to an EtherChannel group. Use the no form of this command to remove an Ethernet interface from an EtherChannel group.

channel-group channel-group-number mode {auto [non-silent] | desirable [non-silent] | on}

no channel-group

Syntax Description

channel-group-number

Specify the channel group number. The range is 1 to 6.

mode

Specify the EtherChannel Port Aggregation Protocol (PAgP) mode of the interface.

auto

Enable PAgP only if a PAgP device is detected.

Auto mode places an interface into a passive negotiating state, in which the interface responds to PAgP packets it receives but does not initiate PAgP packet negotiation. A channel is formed only with another port group in desirable mode. This setting is the default.

desirable

Unconditionally enable PAgP.

Desirable mode places an interface into an active negotiating state, in which the interface initiates negotiations with other interfaces by sending PAgP packets. A channel is formed with another port group in either the desirable or auto mode.

non-silent

(Optional) Used with the auto or desirable keyword when traffic is expected from the other device.

on

Force the interface to channel without PAgP.

With the on mode, a usable EtherChannel exists only when an interface group in the on mode is connected to another interface group in the on mode.

This mode is not available for Long-Reach Ethernet (LRE), because LRE interfaces do not support an EtherChannel-only mode.


Defaults

No channel groups are assigned.

There is no default mode.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced. It replaced the port group command.


Usage Guidelines

You must specify the mode when entering this command. If the mode is not entered, an Ethernet interface is not assigned to an EtherChannel group, and an error message appears.

You do not have to create a port-channel interface before assigning a physical interface to a channel group. A port-channel interface is created automatically when the channel group gets its first physical interface.

You do not have to disable the IP address that is assigned to a physical interface that is part of a channel group, but we highly recommend that you do so.

You can create port channels by entering the interface port-channel global configuration command or when the channel group gets its first physical interface assignment. The port channels are not created at runtime or dynamically.

Any configuration or attribute changes you make to the port-channel interface are propagated to all interfaces within the same channel group as the port channel (for example, configuration changes are also propagated to the physical interfaces that are not part of the port channel, but are part of the channel group).

With the on mode, a usable EtherChannel exists only when a port group in on mode is connected to another port group in on mode.

If you do not specify non-silent with the auto or desirable mode, silent is assumed. The silent mode is used when the switch is connected to a device that is not PAgP-capable and seldom, if ever, transmits packets. A example of a silent partner is a file server or a packet analyzer that is not generating traffic. In this case, running PAgP on a physical port prevents that port from ever becoming operational; however, it allows PAgP to operate, to attach the interface to a channel group, and to use the interface for transmission. Both ends of the link cannot be set to silent.


Caution You should exercise care when setting the mode to on (manual configuration). All ports configured in the on mode are bundled in the same group and are forced to have similar characteristics. If the group is misconfigured, packet loss or Spanning Tree Protocol (STP) loops might occur.

Examples

This example shows how to add an interface to the EtherChannel group specified as channel group 1:

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# channel-group 1 mode on

You can verify your settings by entering the show etherchannel or show running-config privileged EXEC command.

Related Commands

Command
Description

interface port-channel

Accesses or creates the port channel.

port-channel load-balance

Sets the load distribution method among the ports in the EtherChannel.

show etherchannel

Displays EtherChannel information for a channel.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


class

Use the class policy-map configuration command to define a traffic classification for the policy to act on using the class-map name or access group. Use the no form of this command to delete an existing class map.

class class-map-name [access-group name acl-index-or-name]

no class class-map-name

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

class-map-name

Name of the class map.

access-group name acl-index-or-name

(Optional) Number or name of an IP standard or extended access control list (ACL) or name of an extended MAC ACL. For an IP standard ACL, the index range is 1 to 99 and 1300 to 1999; for an IP extended ACL, the index range is 100 to 199 and 2000 to 2699.


Defaults

No policy-map class maps are defined.

Command Modes

Policy-map configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Before you use the class command, use the policy-map global configuration command to identify the policy map and to enter policy-map configuration mode. After you specify a policy map, you can configure a policy for new classes or modify a policy for any existing classes in that policy map. You attach the policy map to an interface by using the service-policy interface configuration command; however, you cannot attach one that uses an ACL classification to the egress direction.

The class name that you specify in the policy map ties the characteristics for that class to the class map and its match criteria as configured by using the class-map global configuration command.

The class command performs the same function as the class-map global configuration command. Use the class command when a new classification, which is not shared with any other ports, is needed. Use the class-map command when the map is shared among many ports.


Note In a policy map, the class named class-default is not supported. The switch does not filter traffic based on the policy map defined by the class class-default policy-map configuration command.


After entering the class command, you enter policy-map class configuration mode. These configuration commands are available:

default: sets a command to its default.

exit: exits policy-map class configuration mode and returns to policy-map configuration mode.

no: returns a command to its default setting.

set: specifies a Differentiated Services Code Point (DSCP) value to be assigned to the classified traffic. For more information, see the set command.

police: defines a policer for the classified traffic. The policer specifies the bandwidth limitations and the action to take when the limits are exceeded. For more information, see the police command.

To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode, use the end command.


Note For more information about configuring ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to create a policy map named policy1. When attached to the ingress port, it matches all the incoming traffic defined in class1 and polices the traffic at an average rate of 1 Mbps and bursts at 131072 bytes. Traffic exceeding the profile is dropped.

Switch(config)# policy-map policy1
Switch(config-pmap)# class class1
Switch(config-pmap-c)# police 1000000 131072 exceed-action drop
Switch(config-pmap-c)# exit
Switch(config-pmap)#

You can verify your settings by entering the show policy-map privileged EXEC command.

Related Commands

Command
Description

class-map

Creates a class map to be used for matching packets to the class whose name you specify.

match

Defines the match criteria to classify traffic.

policy-map

Creates or modifies a policy map that can be attached to multiple interfaces to specify a service policy.

show policy-map

Displays quality of service (QoS) policy maps.


class-map

Use the class-map global configuration command to create a class map to be used for matching packets to the class whose name you specify and to enter class-map configuration mode. Use the no form of this command to delete an existing class map and to return to global configuration mode.

class-map class-map-name [match-all]

no class-map class-map-name [match-all]

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

class-map-name

Name of the class map.

match-all

(Optional) Perform a logical-AND of all matching statements under this class map. All criteria in the class map must be matched.


Defaults

No class maps are defined.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Use this command to specify the name of the class for which you want to create or modify class-map match criteria and to enter class-map configuration mode. In this mode, you can enter one match command to configure the match criteria for this class.

The class-map command and its subcommands are used to define packet classification and marking as part of a globally named service policy applied on a per-interface basis.

In quality of service (QoS) class-map configuration mode, these configuration commands are available:

exit: exits from QoS class-map configuration mode.

no: removes a match statement from a class map.

match: configures classification criteria. For more information, see the match class-map configuration command.

Only one match criterion per class map is supported. For example, when defining a class map, only one match command can be entered.

Only one access control list (ACL) can be configured in a class map. The ACL can have multiple access control entries (ACEs).


Note The switch does not support any deny conditions in an ACL configured in a class map.



Note For more information about configuring ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to configure the class map named class1. class1 has one match criteria, which is a numbered ACL.

Switch(config)# access-list 103 permit tcp any any eq 80
Switch(config)# class-map class1
Switch(config-cmap)# match access-group 103
Switch(config-cmap)# exit

You can verify your settings by entering the show class-map privileged EXEC command.

Related Commands

Command
Description

class

Defines a traffic classification for the policy to act on by using the class-map name or access group.

match

Defines the match criteria to classify traffic.

policy-map

Creates or modifies a policy map that can be attached to multiple interfaces to specify a service policy.

show class-map

Displays QoS class maps.


clear controllers ethernet-controller

Use the clear controllers ethernet-controller privileged EXEC command to delete the Ethernet link transmit and receive statistics for a switch port and for a Long-Reach Ethernet (LRE) customer premises equipment (CPE) device.

clear controllers ethernet-controller [FastEthernet | GE-WAN | Gigabit Ethernet | LongReach Ethernet] interface-id [cpe [port port-id]]

Syntax Description

interface-id

(Optional) ID of the switch port.

cpe

This parameter only operates when Long-Reach Ethernet is specified as the interface. As a standalone keyword, it clears the Ethernet counters of the LRE chipset and all CPE Ethernet ports.

port

This parameter only operates when Long-Reach Ethernet is specified as the interface.The cpe port keywords clear the Ethernet counts of the designated CPE Ethernet port.

port-id

The CPE Ethernet port identifier. Valid values vary from 1 to 4, depending on CPE device model.


Defaults

There is no default.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Using the clear controllers ethernet-controller command without specifying an interface-id clears the Ethernet link statistics for all ports on the switch. Without the port keyword, this command clears the statistics:

Of the Ethernet port on the Cisco 575 LRE CPE

Of all four Ethernet ports on the Cisco 585 LRE CPE

This command clears the switch Ethernet link statistics for all ports on the switch:

clear controllers ethernet-controller 

This command clears the switch Ethernet link statistics for a specific port. It does not clear the CPE Ethernet port statistics on the CPE device:

clear controllers ethernet-controller LongReachEthernet 0/1

This command clears the Ethernet statistics for all the CPE Ethernet ports on the CPE device:

clear controllers ethernet-controller LongReachEthernet 0/1 cpe


Note The Cisco 585 LRE CPE Ethernet ports cannot be cleared on a per-port basis, even by using the port-id argument.


The CPE Ethernet link is the connection between the CPE Ethernet port and the remote Ethernet device (such as a PC) connected to it. It is not the link between the switch LRE port and the LRE CPE device.

It takes the switch several seconds to clear the CPE Ethernet ports. The CPE Ethernet ports on CPE devices take longer to clear than all the other port types.

Examples

This example shows how to use the clear controllers ethernet-controller command to clear the Ethernet link statistics for LRE port 1:

Switch# clear controllers ethernet-controller lo0/1
Switch#

This example clears the Ethernet statistics for all the CPE Ethernet ports on a Cisco 585 LRE CPE:

Switch# clear controllers ethernet-controller lo0/1 cpe
Switch#

You can verify that information was deleted by entering the show controllers ethernet-controller user EXEC command.

Related Commands

Command
Description

show controllers ethernet-controller

Displays the Ethernet link transmit and receive statistics on a Fast Ethernet or a switch LRE port.


clear controllers lre

Use the clear controllers lre user exec command to reset the switch Long-Reach Ethernet (LRE) or the Cisco LRE customer premises equipment (CPE) device interface.

clear controllers lre {local link | remote [ link | micro]} interface-id

Syntax Description

local link

Resets the LRE interfaces on the switch by performing a port reset.

remote link

Resets the LRE interface for the CPE device.

micro

Resets the Cisco 585 CPE device.


Defaults

No default is defined.

Command Modes

User Exec mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Use this command to reset a questionable local or remote interface.

The clear controllers lre remote micro command is not supported on the Cisco 575 LRE CPE device.

Examples

This example shows how to reset the local LRE interfaces on the switch:

Switch> clear controllers lre local link
Switch>

This example shows how to reset all Cisco 575 LRE or Cisco 585 LRE CPE devices connected to the switch:


Switch> clear controllers lre remote link
Switch>

This example shows how to reset the Cisco 585 LRE CPE micro-controller connected to the switch:


Switch(> clear controllers lre remote micro
Switch>

Related Commands

Command
Description

cpe shutdown

Disables one or more customer premises equipment (CPE) ports.

shutdown

Disables the LRE transmitter of an LRE interface.


clear controllers lre link monitor

Use the clear controllers lre link monitor privileged EXEC command to delete LRE link monitor data.

clear controllers lre link monitor interface-id

Syntax Description

interface-id

ID of the switch LRE port.


Defaults

There is no default.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command clears all collected link monitor data. New entries are added when a new polling cycle starts.

Examples

This example shows how to clear link monitor data on LRE interface 0/2:


Switch# clear controllers lre link monitor lo 0/2
Switch# 

Related Commands

Command
Description

link monitor

Enables the LRE link monitor on a port.

link monitor logging

Enables link monitor event logging per port.

link monitor threshold snr

Sets an signal-to-noise margin for the LRE link monitor.

link monitor threshold rserr

Sets a Reed-Solomon error threshold for the LRE link monitor.

show controllers lre link monitor errors

Displays Reed-Solomon and Ethernet errors captured by the LRE link monitor.

show controllers lre link monitor parameters

Displays the switch or CPE device operating parameter data.

show controllers lre link monitor statistics

Displays the switch or CPE device statistical data.


clear controllers lre log

Use the clear controllers lre log privileged EXEC command to delete the history of link, configuration, and timer events for a specific Long-Reach Ethernet (LRE) port or for all switch LRE ports.

clear controllers lre log [interface-id]

Syntax Description

interface-id

(Optional) ID of the switch LRE port.


Defaults

There is no default.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Using the clear controllers lre log command without specifying a switch LRE port deletes the history of events on all switch LRE ports.

Examples

This example shows how to use the clear controllers lre log command to delete the history of events on switch LRE port 3:


Switch# clear controllers lre log longReachEthernet 0/3
Switch# 

You can verify that information was deleted by entering the show controllers lre log privileged EXEC command.

Related Commands

Command
Description

logging lre

Sets the LRE logging level to event, extended, or normal.

show controllers lre log

Displays the history of link, configuration, and timer events for a specific switch LRE port or for all LRE ports on the switch.


clear interface

Use the clear interface privileged EXEC command to clear the hardware logic on an interface or a VLAN.

clear interface {interface-id | vlan vlan-id}

Syntax Description

interface-id

ID of the interface.

vlan-id

VLAN ID. Valid VLAN IDs are from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.


Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Examples

This example shows how to clear the hardware logic on a Gigabit Ethernet interface:

Switch# clear interface gigabitethernet0/1

This example shows how to clear the hardware logic on a Long-Reach Ethernet (LRE) interface:

Switch# clear interface lo0/5

This example shows how to clear the hardware logic on a specific VLAN:

Switch# clear interface vlan 5

You can verify that the interface-reset counter for an interface is incremented by entering the show interfaces privileged EXEC command.

clear lre rate selection

Use the clear lre rate selection privileged EXEC command to reset the current rate selection setting and to restart rate selection for a specific Long-Reach Ethernet (LRE) port or for all switch LRE ports.

clear lre rate selection [lock] [interface-id]

Syntax Description

lock

(Optional) Rate selection runs on all ports that have rate selection enabled, including ports that are locked.

interface-id

(Optional) ID of the switch LRE port.


Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Using the clear lre rate selection command without specifying a switch LRE port runs rate selection on all switch LRE ports that have rate selection enabled except those ports with locked profiles. Specifying the lock keyword runs rate selection on all profiles, including those that are locked.

Examples

This example shows how to use the clear lre rate selection command to reset the rate selection setting and to restart rate selection on port 1.

Switch# clear lre rate selection lo0/1
Switch# 

This example shows how to rerun rate selection on all ports, including any locked ports.

Switch# clear lre rate selection lock
Switch#

This example shows how to reset and to restart rate selection on port 2, overriding the locked status.

Switch# clear lre rate selection lock lo0/2
Switch#

Related Commands

Command
Description

rate selection

Enables rate selection on a specific port

rate selection sequence

Assigns a rate selection sequence for a specific port.

lre rate selection sequence

Assigns a rate selection sequence for the entire switch.


clear mac address-table

Use the clear mac address-table privileged EXEC command to delete from the MAC address table a specific dynamic address, all dynamic addresses on a particular interface, or all dynamic addresses on a particular VLAN. This command also clears the MAC address notification global counters.

clear mac address-table {dynamic [address mac-addr | interface interface-id | vlan vlan-id] | notification}


Note Beginning with Release 12.1(11)EA1, the clear mac address-table command replaces the clear mac-address-table command (with the hyphen). The clear mac-address-table command (with the hyphen) will become obsolete in a future release.


Syntax Description

dynamic

Delete all dynamic MAC addresses.

dynamic address mac-addr

(Optional) Delete the specified dynamic MAC address.

dynamic interface interface-id

(Optional) Delete all dynamic MAC addresses on the specified physical port or port channel.

dynamic vlan vlan-id

(Optional) Delete all dynamic MAC addresses for the specified VLAN. Valid IDs are from 1 to 4096 when the enhanced software image (EI) is installed and 1 to 1005 when the standard software image (SI) is installed. Do not enter leading zeros.

notification

Clear the notifications in the history table and reset the counters.


Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(6)EA2

This command was introduced.

12.1(9)EA1

The notification keyword was added.

12.1(11)EA1

The clear mac-address-table command was replaced by the clear mac address-table command.


Examples

This example shows how to remove a specific dynamic address from the MAC address table:

Switch# clear mac address-table dynamic address 0008.0070.0007

You can verify that the information was deleted by entering the show mac address-table privileged EXEC command.

Related Commands

Command
Description

mac address-table notification

Enables the MAC address notification feature.

show mac address-table

Displays the MAC address table static and dynamic entries.

show mac address-table notification

Displays the MAC address notification settings for all interfaces or the specified interface.

snmp trap mac-notification

Enables the Simple Network Management Protocol (SNMP) MAC address notification trap on a specific interface.


clear pagp

Use the clear pagp privileged EXEC command to clear Port Aggregation Protocol (PAgP) channel-group information.

clear pagp {channel-group-number [counters] | counters}

Syntax Description

channel-group-number

Channel group number. The range is 1 to 6.

counters

Clear traffic counters.


Defaults

This command has no default setting.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Examples

This example shows how to clear channel-group information for a specific group:

Switch# clear pagp 4

This example shows how to clear channel-group traffic counters:

Switch# clear pagp counters

You can verify that the information was deleted by entering the show pagp privileged EXEC command.

Related Commands

Command
Description

show pagp

Displays PAgP channel-group information.


clear port-security dynamic

Use the clear port-security dynamic privileged EXEC command to delete from the MAC address table a specific dynamic secure address or all the dynamic secure addresses on an interface.

clear port-security dynamic [address mac-addr | interface interface-id]

Syntax Description

address mac-addr

(Optional) Delete the specified dynamic secure MAC address.

interface interface-id

(Optional) Delete all the dynamic secure MAC addresses on the specified physical port or port channel.


Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)EA1

This command was introduced.


Examples

This example shows how to remove a specific dynamic secure address from the MAC address table:

Switch# clear port-security dynamic address 0008.0070.0007

This example shows how to remove all the dynamic secure addresses learned on a specific interface:

Switch# clear port-security dynamic interface gigabitethernet0/1

This example shows how to remove all the dynamic secure addresses from the address table:

Switch# clear port-security dynamic

You can verify that the information was deleted by entering the show port-security privileged EXEC command.

Related Commands

Command
Description

switchport port-security

Enables port security on an interface.

switchport port-security mac-address mac-address

Configures secure MAC addresses.

switchport port-security maximum value

Configures a maximum number of secure MAC addresses on a secure interface.

show port-security

Displays the port security settings defined for an interface or for the switch.


clear port-security sticky

Use the clear port-security sticky privileged EXEC command to delete from the secure MAC address table a specific sticky secure address, all the sticky secure addresses on an interface, or all the sticky secure addresses on the switch.

clear port-security sticky [address mac-addr | interface interface-id]

Syntax Description

address mac-addr

(Optional) Delete the specified sticky secure MAC address.

interface interface-id

(Optional) Delete all the sticky secure MAC addresses on the specified physical port.


Defaults

No default is defined.

Command Modes

Privileged EXEC

Usage Guidelines

If you enter the clear port-security sticky privileged EXEC command without keywords, the switch removes all sticky secure MAC addresses from the secure MAC address table.

If you enter the clear port-security sticky address mac-addr command, the switch removes the specified secure MAC address from the secure MAC address table.

If you enter the clear port-security sticky interface interface-id command, the switch removes all sticky secure MAC addresses on an interface from the secure MAC address table.

Command History

Release
Modification

12.1(11)EA1a

This command was introduced.


Examples

This example shows how to remove a specific sticky secure address from the secure MAC address table:

Switch# clear port-security sticky address 0008.0070.0007

This example shows how to remove all the sticky secure addresses learned on a specific interface:

Switch# clear port-security sticky interface gigabitethernet0/1

This example shows how to remove all the sticky secure addresses from the secure MAC address table:

Switch# clear port-security sticky

You can verify that the information was deleted by entering the show port-security address privileged EXEC command.

Related Commands

Command
Description

show port-security address

Displays the port security settings defined for an interface or for the switch.

switchport port-security

Enables port security on an interface.

switchport port-security mac-address sticky

Enables the interface for sticky learning.

switchport port-security mac-address sticky mac-address

Specifies a sticky secure MAC address

switchport port-security maximum value

Configures a maximum number of secure MAC addresses on a secure interface.


clear spanning-tree detected-protocols

Use the clear spanning-tree detected-protocols privileged EXEC command to restart the protocol migration process (force the renegotiation with neighboring switches) on all interfaces or on the specified interface.

clear spanning-tree detected-protocols [interface interface-id]

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

interface interface-id

(Optional) Restart the protocol migration process on the specified interface. Valid interfaces include physical ports, VLANs, and port channels. The valid VLAN range is 1 to 4094; do not enter leading zeros. The valid port-channel range is 1 to 6.


Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(9)EA1

This command was introduced.


Usage Guidelines

A switch running both the Multiple Spanning Tree Protocol (MSTP) and the Rapid Spanning Tree Protocol (RSTP) supports a built-in protocol migration mechanism that enables it to interoperate with legacy 802.1D switches. If an MSTP and RSTP switch receives a legacy 802.1D configuration bridge protocol data unit (BPDU) with the protocol version set to 0, it sends only 802.1D BPDUs on that port. A multiple spanning-tree (MST) switch can also detect that a port is at the boundary of a region when it receives a legacy BPDU, an MST BPDU (version 3) associated with a different region, or an RST BPDU (version 2).

However, the switch does not automatically revert to the MSTP mode if it no longer receives 802.1D BPDUs because it cannot determine whether the legacy switch has been removed from the link unless the legacy switch is the designated switch. Use the clear spanning-tree detected-protocols command in this situation.

Examples

This example shows how to restart the protocol migration process on Fast Ethernet interface 0/1:

Switch# clear spanning-tree detected-protocols interface fastethernet0/1

clear vmps statistics

Use the clear vmps statistics privileged EXEC command to clear the statistics maintained by the VLAN Query Protocol (VQP) client.

clear vmps statistics

Syntax Description

This command has no arguments or keywords.

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Examples

This example shows how to clear VLAN Membership Policy Server (VMPS) statistics:

Switch# clear vmps statistics

You can verify that the information was deleted by entering the show vmps statistics privileged EXEC command.

Related Commands

Command
Description

show vmps statistics

Displays the VQP version, reconfirmation interval, retry count, VMPS IP addresses, and the current and primary servers.


clear vtp counters

Use the clear vtp counters privileged EXEC command to clear the VLAN Trunking Protocol (VTP) and pruning counters.

clear vtp counters

Syntax Description

This command has no arguments or keywords.

Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Examples

This example shows how to clear the VTP counters:

Switch# clear vtp counters

You can verify that the information was deleted by entering the show vtp counters privileged EXEC command.

Related Commands

Command
Description

show vtp counters

Displays general information about the VTP management domain, status, and counters.


cluster commander-address

You do not need to enter this command. The command switch automatically provides its MAC address to member switches when these switches join the cluster. The member switch adds this information and other cluster information to its running configuration file. Enter the no form of this global configuration command from the member switch console port to remove it from a cluster only during debugging or recovery procedures.

cluster commander-address mac-address [member number name name]

no cluster commander-address

Syntax Description

mac-address

MAC address of the cluster command switch.

member number

(Optional) Number of a configured member switch. The range is from 0 to 15.

name name

(Optional) Name of the configured cluster up to 31 characters.


Defaults

The switch is not a member of any cluster.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

A cluster member can have only one command switch.

The member switch retains the identity of the command switch during a system reload by using the mac-address parameter.

You can enter the no form on a member switch to remove it from the cluster during debugging or recovery procedures. You would normally use this command from the member switch console port only when the member has lost communication with the command switch. With normal switch configuration, we recommend that you remove member switches only by entering the no cluster member n global configuration command on the command switch.

When a standby command-switch becomes active (becomes the command switch), it removes the cluster commander-address line from its configuration.

Examples

This is an example of text from the running configuration of a cluster member:

Switch(config)# show running-config

<output truncated>

cluster commander-address 00e0.9bc0.a500 member 4 name my_cluster

<output truncated>

This example shows how to remove a member from the cluster by using the cluster member console:

Switch# configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# no cluster commander-address

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


cluster discovery hop-count

Use the cluster discovery hop-count global configuration command on the command switch to set the hop-count limit for extended discovery of candidate switches. Use the no form of this command to set the hop count to the default value.

cluster discovery hop-count number

no cluster discovery hop-count

Syntax Description

number

Number of hops from the cluster edge that the command switch limits the discovery of candidates. The range is from 1 to 7.


Defaults

The hop count is set to 3.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Enter this command only on the command switch. This command does not operate on member switches.

If the hop count is set to 1, it disables extended discovery. The command switch discovers only candidates that are one hop from the edge of the cluster. The edge of the cluster is the point between the last discovered member switch and the first discovered candidate switch.

Examples

This example shows how to set the hop count limit to 4. This command is entered on the command switch.

Switch(config)# cluster discovery hop-count 4

You can verify your settings by entering the show cluster privileged EXEC command on the command switch.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.

show cluster candidates

Displays a list of candidate switches.


cluster enable

Use the cluster enable global configuration command on a command-capable switch to enable it as the cluster command switch, assign a cluster name, and optionally assign a member number to it. Use the no form of the command to remove all members and make the command switch a candidate switch.

cluster enable name [command-switch-member-number]

no cluster enable

Syntax Description

name

Name of the cluster up to 31 characters. Valid characters include only alphanumerics, dashes, and underscores.

command-switch-member-number

(Optional) Assign a member number to the command switch of the cluster. The range is from 0 to 15.


Defaults

The switch is not a command switch.

No cluster name is defined.

The member number is 0 when this is the command switch.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

This command runs on any command-capable switch that is not part of any cluster. This command fails if a device is already configured as a member of the cluster.

You must name the cluster when you enable the command switch. If the switch is already configured as the command switch, this command changes the cluster name if it is different from the previous name.

Examples

This example shows how to enable the command switch, name the cluster, and set the command switch member number to 4:

Switch(config)# cluster enable Engineering-IDF4 4

You can verify your settings by entering the show cluster privileged EXEC command on the command switch.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.


cluster holdtime

Use the cluster holdtime global configuration command on the command switch to set the duration in seconds before a switch (either the command or member switch) declares the other switch down after not receiving heartbeat messages. Use the no form of this command to set the duration to the default value.

cluster holdtime holdtime-in-secs

no cluster holdtime

Syntax Description

holdtime-in-secs

Duration in seconds before a switch (either a command or member switch) declares the other switch down. The range is from 1 to 300 seconds.


Defaults

The holdtime is 80 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Use this command with the cluster timer global configuration command only on the command switch. The command switch propagates the values to all its cluster members so that the setting is consistent among all switches in the cluster.

The holdtime is typically set as a multiple of the interval timer (cluster timer). For example, it takes (holdtime-in-secs divided by interval-in-secs) number of heartbeat messages to be missed in a row to declare a switch down.

Examples

This example shows how to change the interval timer and the duration on the command switch:

Switch(config)# cluster timer 3
Switch(config)# cluster holdtime 30

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.


cluster management-vlan

Use the cluster management-vlan global configuration command on the command switch to change the management VLAN for the entire cluster. Use the no form of this command to change the management VLAN to VLAN 1.

cluster management-vlan n

no cluster management-vlan

Syntax Description

n

VLAN ID of the new management VLAN. Valid VLAN IDs are from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.


Defaults

The default management VLAN is VLAN 1.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Enter this command only on the command switch. This command changes the management VLAN of the command switch and member switches. Member switches must have either a trunk connection or connection to the new command-switch management VLAN to maintain communication with the command switch.

This command is not written to the configuration file.

Examples

This example shows how to change the management VLAN to VLAN 5 on the entire cluster:

Switch(config)# cluster management-vlan 5

You can verify your settings by entering the show interfaces vlan vlan-id privileged EXEC command.

Related Commands

Command
Description

show interfaces

Displays the administrative and operational status of a switching (nonrouting) port.


cluster member

Use the cluster member global configuration command on the command switch to add members to a cluster. Use the no form of the command to remove members from the cluster.

cluster member [n] mac-address H.H.H [password enable-password] [vlan vlan-id]

no cluster member n

Syntax Description

n

(Optional) The number that identifies a cluster member. The range is from 0 to 15.

mac-address H.H.H

MAC address of the member switch in hexadecimal format.

password enable-password

(Optional) Enable password of the candidate switch. The password is not required if there is no password on the candidate switch.

vlan vlan-id

(Optional) VLAN ID through which the candidate is added to the cluster by the command switch. The range is 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.


Defaults

A newly enabled command switch has no associated cluster members.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Enter this command only on the command switch to add a member to or remove a member from the cluster. If you enter this command on a switch other than the command switch, the switch rejects the command and displays an error message.

You must enter a member number to remove a switch from the cluster. However, you do not need to enter a member number to add a switch to the cluster. The command switch selects the next available member number and assigns it to the switch that is joining the cluster.

You must enter the enable password of the candidate switch for authentication when it joins the cluster. The password is not saved in the running or startup configuration. After a candidate switch becomes a member of the cluster, its password becomes the same as the command-switch password.

If a switch does not have a configured host name, the command switch appends a member number to the command-switch host name and assigns it to the member switch.

If you do not specify a VLAN ID, the command switch automatically chooses a VLAN and adds the candidate to the cluster.

Examples

This example shows how to add a switch as member 2 with MAC address 00E0.1E00.2222 and the password key to a cluster. The command switch adds the candidate to the cluster through VLAN 3.

Switch(config)# cluster member 2 mac-address 00E0.1E00.2222 password key vlan 3

This example shows how to add a switch with MAC address 00E0.1E00.3333 to the cluster. This switch does not have a password. The command switch selects the next available member number and assigns it to the switch joining the cluster:

Switch(config)# cluster member mac-address 00E0.1E00.3333

You can verify your settings by entering the show cluster members privileged EXEC command on the command switch.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.

show cluster candidates

Displays a list of candidate switches.

show cluster members

Displays information about the cluster members.


cluster run

Use the cluster run global configuration command to enable clustering on a switch. Use the no form of this command to disable clustering on a switch.

cluster run

no cluster run

Defaults

Clustering is enabled on all switches.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

When you enter the no cluster run command on a command switch, the command switch is disabled. Clustering is disabled, and the switch cannot become a candidate switch.

When you enter the no cluster run command on a member switch, it is removed from the cluster. Clustering is disabled, and the switch cannot become a candidate switch.

When you enter the no cluster run command on a switch that is not part of a cluster, clustering is disabled on this switch. This switch cannot then become a candidate switch.

Examples

This example shows how to disable clustering on the command switch:

Switch(config)# no cluster run

You can verify that clustering is disabled by entering the show cluster privileged EXEC command.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.


cluster standby-group

Use the cluster standby-group global configuration command to enable command switch redundancy by binding the Hot Standby Router Protocol (HSRP) standby group to the cluster. Use the no form of this command to unbind the cluster from the HSRP standby group.

cluster standby-group HSRP-group-name

no cluster standby-group

Syntax Description

HSRP-group-name

Name of the HSRP group that is bound to the cluster. The group name is limited to 32 characters.


Defaults

The cluster is not bound to any HSRP group.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

You must enter this command only on the command switch. If you enter it on a member switch, an error message appears.

The command switch propagates the cluster-HSRP binding information to all members. Each member switch stores the binding information in its nonvolatile RAM (NVRAM).

The HSRP group name must be a valid standby group; otherwise, the command entry produces an error.

Use the same group name on all members of the HSRP standby group that is to be bound to the cluster. Use the same HSRP group name on all cluster-HSRP capable members for the HSRP group that is to be bound. (When not binding a cluster to an HSRP group, you can use different names on the cluster command and the member switches.)

Examples

This example shows how to bind the HSRP group named my_hsrp to the cluster. This command is entered on the command switch.

Switch(config)# cluster standby-group my_hsrp

This example shows the error message when this command is entered on a command switch and the specified HSRP standby group does not exist:

Switch(config)# cluster standby-group my_hsrp
%ERROR:Standby (my_hsrp) group does not exist

This example shows the error message when this command is entered on a member switch:

Switch(config)# cluster standby-group my_hsrp
%ERROR:This command runs on a cluster command switch

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.

show standby

Displays standby group information.

standby ip

Enables HSRP on the interface.


cluster timer

Use the cluster timer global configuration command on the command switch to set the interval in seconds between heartbeat messages. Use the no form of this command to set the interval to the default value.

cluster timer interval-in-secs

no cluster timer

Syntax Description

interval-in-secs

Interval in seconds between heartbeat messages. The range is from
1 to 300 seconds.


Defaults

The interval is 8 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Use this command with the cluster holdtime global configuration command only on the command switch. The command switch propagates the values to all its cluster members so that the setting is consistent among all switches in the cluster.

The holdtime is typically set as a multiple of the heartbeat interval timer (cluster timer). For example, it takes (holdtime-in-secs divided by the interval-in-secs) number of heartbeat messages to be missed in a row to declare a switch down.

Examples

This example shows how to change the heartbeat interval timer and the duration on the command switch.

Switch(config)# cluster timer 3
Switch(config)# cluster holdtime 30

You can verify your settings by entering the show cluster privileged EXEC command.

Related Commands

Command
Description

show cluster

Displays the cluster status and a summary of the cluster to which the switch belongs.


controller LongReachEthernet

Use the controller LongReachEthernet global configuration command to enter controller configuration mode.

controller LongReachEthernet ctrlr#

Syntax Description

ctrlr#

The Long-Reach Ethernet (LRE) controller number. Controller numbers are device specific. Valid entries are 0 to 2 on a 24-port LRE switch and 0 on a 8-port LRE switch.


Defaults

There is no default.

Command Modes

Global configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

You can use this command to enter controller submode. An LRE controller is the LRE chipset in the switch.

Examples

This example shows how to enter controller configuration mode for controller 0.


Switch(config)# controller Lo 0
Switch(config-controller)#

Related Commands

Command
Description

upgrade binary

Configures upgrades on either end of an LRE link.

upgrade preserve

Prevents an upgrade of the local CPE controller and all remote CPE devices connected to it.


cpe duplex

Use the cpe duplex interface configuration command to specify the duplex mode of operation for all customer premises equipment (CPE) ports. Use the no form of this command to return the port to its default value.

cpe duplex {auto | full | half} [port id]

no cpe duplex {auto | full | half} [port id]

Syntax Description

auto

The port automatically detects whether to run in full- or half- duplex mode.

full

The port is in full-duplex mode.

half

The port is in half-duplex mode.

id

(Optional) The CPE Ethernet port identifier. Valid values vary from 1 to 4, depending on CPE device.


Defaults

The default is half.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

The cpe duplex full command sets the duplex mode to full for all the CPE Ethernet ports. A setting of auto places the CPE Ethernet ports in an auto-negotiate state, and a setting of half forces the duplex to half for all the CPE Ethernet ports.

If the keyword port is not specified, the value is applied globally to all the CPE Ethernet ports. If the keyword port is specified, the value is applied to the specified CPE Ethernet port and overrides any global speed settings.

The cpe duplex full port 2 command sets the duplex mode of port 2 of a CPE device to full duplex. If you entered both the cpe duplex full command and the cpe duplex full port 2 command, they would both be added to the configuration file, and the port specific command would take priority over the base cpe command.

Specifying no cpe duplex sets all the CPE Ethernet ports to the default setting of half duplex.

Examples

This example show how to set the CPE device to auto:

Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# cpe duplex auto
Switch(config-if)#

This example shows how to set port 3 of a Cisco 585 LRE CPE to full duplex:


Switch# configure terminal
Switch(config)# interface long 0/3
Switch(config-if)# cpe duplex full port 3
Switch(config-if)#

This example shows how to restore port 3 of a Cisco 585 LRE CPE to the default mode of half duplex:


Switch# configure terminal
Switch(config)# interface long 0/3
Switch(config-if)# no cpe duplex full port 3
Switch(config-if)#

This example shows how the port-specific command works with the base-cpe command. Port 1 is set to full duplex, port 2 is set to half duplex, and the remainder of the ports have autonegotiation.

Switch# configure terminal
Switch(config)# interface long 0/4
Switch(config-if)# cpe duplex auto
Switch(config-if)# cpe duplex full port 1
Switch(config-if)# cpe duplex half port 2

If you enter the following command, port 1 is set to autonegotiation because the CPE device base command has a value of auto.

Switch(config-if)# no cpe duplex full port

Related Commands

Command
Description

cpe speed

Specifies the CPE port speed settings.

show interfaces

Displays CPE Ethernet ports connection, speed, or duplex status when the cpe parameter is specified.


cpe protected

Use the cpe protected interface configuration command to restrict data traffic to individual ports on Cisco 585 LRE customer premises equipment (CPE) ports. Use the no form of this command to allow different ports on the same CPE device to exchange data directly.

cpe protected [port id]

no cpe protected [port id]

Syntax Description

port id

(Optional) The CPE Ethernet port identifier. Valid values vary from 1 to 4, depending on CPE device.


Defaults

The default is no cpe protected.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Even though you can protect an LRE interface using the switchport protected command, that command does not protect individual CPE Ethernet ports. To ensure that data traffic from one CPE port is not accessed on any of the other three ports, use the cpe protected command. The cpe protected command restricts CPE traffic, either at the CPE device level or at the individual port level for data security. By specifying the cpe protected command without a CPE port, data is protected for all applicable CPE ports. By specifying the additional port id parameters, you can protect an indivdual CPE Ethernet port.

When protecting individual CPE ports, always specify a minimum of two ports. A single port that is configured as protected has no effect. Data traffic does not flow between two ports that are protected.

Examples

This example show how to protect CPE port 1 on Long-Reach Ethernet 0/1:

Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# cpe protected port 1
Switch(config-if)#

Related Commands

Command
Description

show controllers lre cpe protected

Shows CPE protected port information.

switchport protected

Isolates unicast, multicast, and broadcast traffic at Layer 2 from other protected ports on the same switch.


cpe shutdown

Use the cpe shutdown interface configuration command to disable one or more customer premises equipment (CPE) ports. Use the no form of this command to enable a port.

cpe shutdown [port id ]

no cpe shutdown [port id ]

Syntax Description

id

(Optional) The CPE Ethernet port identifier. Valid values vary from 1 to 4, depending on the CPE device.


Defaults

The default is that the ports are enabled.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

The cpe shutdown command operates in a similar method as the speed and duplex commands. The CPE Ethernet ports can be shut down at the CPE device level and the port level. If you add a configuration at the CPE device level and at the port level, you must request the no form of the command for both configurations to return the port to the default state.

If the keyword port is not specified, the value is applied globally to all the CPE Ethernet ports. If the keyword port is specified, the value is applied to the specified CPE Ethernet port and overrides any global speed settings.

Examples

This example shows how to disable all ports on the CPE device:


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# cpe shutdown 
Switch(config-if)#

This example shows how to disable port 2 on the CPE device:


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# cpe shutdown port 2
Switch(config-if)#



This example shows how to enable all CPE Ethernet ports that do not have a port-specific shutdown configured. If you followed this no cpe shutdown command after the previous example, port 2 continues to be shutdown because a port -specific shutdown command was entered. The no cpe shutdown port 2 is the only way to enable the port.


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# no cpe shutdown
Switch(config-if)#

Related Commands

Command
Description

show interfaces

Displays CPE Ethernet ports connection, speed, or duplex status when the cpe parameter is specified.

shutdown

Disables the LRE transmitter of an LRE interface.


cpe speed

Use the cpe speed interface configuration command to set the speed of an customer premises equipment (CPE) port. Use the no form of this command to return a CPE port to the default setting.

cpe speed [auto | 10 | 100 ] [port id ]

no cpe speed [auto | 10 | 100 ] [port id ]

Syntax Description

auto

The port automatically detects whether it should run at 10 or 100 Mbps.

10

The port runs at 10 Mbps.

100

The port runs at 100 Mbps.

port id

(Optional) The CPE Ethernet port identifier. Valid values vary from 1 to 4, depending on the CPE device.


Defaults

The default speed is auto.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

If the keyword port is not specified, the value is applied globally to all the CPE Ethernet ports. If the keyword port is specified, the value is applied to the specified CPE Ethernet port and overrides any global speed settings.

Examples

This example shows how to set port 1 on a CPE to 100 Mbps:


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# cpe speed 100 port 1
Switch(config-if)#

This example shows how to restore the default setting of auto to all CPE Ethernet ports that do not have a port-specific speed configured:


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# no cpe speed 100
Switch(config-if)#

This example shows how the port-specific command works with the base CPE command. Port 1 is set to 10 Mbps, port 2 is set to 100 Mbps, and the remainder of the ports have autonegotiation.

Switch# configure terminal
Switch(config)# interface long 0/4
Switch(config-if)# cpe speed auto
Switch(config-if)# cpe speed 10 port 1
Switch(config-if)# cpe speed 100 port 2

If you enter this command, port 1 is set to autonegotiation because the CPE device base command has a value of auto.

Switch(config-if)# no cpe speed 10 port

Related CommandsSwitch(config-if)

Command
Description

show interfaces

Displays connection, speed, and duplex settings for CPE Ethernet ports attached to the specified LRE switch port.

local duplex

Sets the port speed for LRE ports.


cpe type

Use the cpe type interface configuration command to set the type of an customer premises equipment (CPE) port that is connected to a Long-Reach Ethernet (LRE) switch.

cpe type [CISCO575-LRE | CISCO585-LRE | unknown]

Syntax Description

This command has no arguments or keywords.

Defaults

The default is unknown.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command can only be configured when the port is shut down. If the link is active on a CPE device port, the switch detects the CPE device type and automatically modifies the configuration. You cannot change the CPE device type on active links. For example, if the active CPE device type is CISCO575-LRE, you cannot change the type to CISCO585-LRE or unknown.

Examples

This example shows how to set the CPE device type to CISCO585-LRE while the link is down:


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# cpe type CISCO585-LRE
Switch(config-if)#

Related CommandsSwitch(config-if)

Command
Description

show interfaces

Displays connection, speed, and duplex settings for CPE Ethernet ports attached to the specified LRE switch port.


define interface-range

Use the define interface-range global configuration command to create an interface-range macro. Use the no form of this command to delete the defined macro.

define interface-range macro-name interface-range

no define interface-range macro-name interface-range

Syntax Description

macro-name

Name of the interface-range macro; up to 32 characters.

interface-range

Interface range; for valid values for interface ranges, see "Usage Guidelines."


Defaults

This command has no default setting.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The macro name is a 32-character maximum character string.

A macro can contain up to five ranges.

All interfaces in a range must be the same type; that is, all Fast Ethernet ports, all Gigabit Ethernet ports, all EtherChannel ports, or all VLANs, but you can combine multiple interface types in a macro.

When entering the interface-range, use this format:

type {first-interface} - {last-interface}

You must add a space between the first interface number and the hyphen when entering an interface-range. For example, gigabitethernet 0/1 -2 is a valid range; gigabitethernet 0/1-2 is not a valid range.

Valid values for type and interface:

vlan vlan-id, where vlan-id is from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed.

port-channel port-channel-number, where port-channel-number is from 1 to 6

fastethernet interface-id

gigabitethernet interface-id

VLAN interfaces must have been configured with the interface vlan command (the show running-config privileged EXEC command displays the configured VLAN interfaces). VLAN interfaces not displayed by the show running-config command cannot be used in interface-ranges.

For physical interfaces, the interface-id is defined as a slot/number (where slot is always 0 for the switch), and the range can be entered as type 0/number - number (for example, gigabitethernet0/1 - 2). You can also enter multiple ranges.

When you define a range, you must enter a space before and after the hyphen (-):

interface range gigabitethernet0/1 - 2

When you define multiple ranges, you must enter a space before and after the comma (,):

interface range fastethernet0/3 - 7 , gigabitethernet0/1 - 2

Examples

This example shows how to create a multiple-interface macro:

Switch(config)# define interface-range macro1 fastethernet 0/3 -7 , gigabitethernet 0/2 

Related Commands

Command
Description

interface range

Executes a command on multiple ports at the same time.

show running-config

Displays the current operating configuration, including defined macros. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


delete

Use the delete privileged EXEC command to delete a file or directory on the Flash memory device.

delete [/force] [/recursive] filesystem:/file-url

Syntax Description

/force

(Optional) Suppress the prompt that confirms the deletion.

/recursive

(Optional) Delete the named directory and all subdirectories and the files contained in it.

filesystem:

Alias for a Flash file system. Use flash: for the system board Flash device.

/file-url

The path (directory) and filename to delete.


Command Modes

Privileged EXEC

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.

12.1(6)EA2

The /force and /recursive keywords were added.


Usage Guidelines

If you use the /force keyword, you are prompted once at the beginning of the deletion process to confirm the deletion.

If you use the /recursive keyword without the /force keyword, you are prompted to confirm the deletion of every file.

The prompting behavior depends on the setting of the file prompt global configuration command. By default, the switch prompts for confirmation on destructive file operations. For more information about this command, refer to the Cisco IOS Command Reference for Release 12.1.

Examples

This example shows how to delete a file from the switch Flash memory:

Switch# delete flash:filename

You can verify that the directory was removed by entering the dir filesystem: privileged EXEC command.

Related Commands

Command
Description

copy

Downloads a file from a source, such as a TFTP server, to a destination, such as the Flash memory.

dir filesystem:

Displays a list of files on a file system.

rename

Renames a file.


deny (access-list configuration)

Use the deny access-list configuration command to configure conditions for a named or numbered IP access control list (ACL). Use the no form of the command to remove a deny condition from the IP ACL.

Use these commands with standard IP ACLs:

deny {source source-wildcard | host source | any}

no deny {source source-wildcard | host source | any}

Use these commands with extended IP ACLs:

deny protocol {source source-wildcard | host source | any} [operator port] {destination destination-wildcard | host source | any} [operator port] [dscp dscp-value] [time-range time-range-name]

no deny protocol {source source-wildcard | host source | any} [operator port] {destination destination-wildcard | host source | any} [operator port] [dscp dscp-value] [time-range time-range-name]

This command is available on physical interfaces only if your switch is running the enhanced software image (EI).

Syntax Description

protocol

Name of an IP protocol.

protocol can be ip, tcp, or udp.

source source-wildcard | host source | any

Define a source IP address and wildcard.

The source is the source address of the network or host from which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The source-wildcard applies wildcard bits to the source.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for source and source-wildcard of source 0.0.0.0.

The keyword any as an abbreviation for source and source-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a source-wildcard.

destination destination-wildcard | host destination | any

Define a destination IP address and wildcard.

The destination is the destination address of the network or host to which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The destination-wildcard applies wildcard bits to the destination.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for destination and destination-wildcard of destination 0.0.0.0.

The keyword any as an abbreviation for destination and destination-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a destination-wildcard.

operator port

(Optional) Define a source or destination port.

The operator can be only eq (equal).

If operator is after the source IP address and wildcard, conditions match when the source port matches the defined port.

If operator is after the destination IP address and wildcard, conditions match when the destination port matches the defined port.

The port is a decimal number or name of a Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) port. The number can be from 0 to 65535.

Use TCP port names only for TCP traffic.

Use UDP port names only for UDP traffic.

dscp dscp-value

(Optional) Define a Differentiated Services Code Point (DSCP) value to classify traffic.

For the dscp-value, enter any of the 13 supported DSCP values (0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56), or use the question mark (?) to see a list of available values.

time-range time-range-name

(Optional) For the time-range keyword, enter a meaningful name to identify the time range. For a more detailed explanation of this keyword, refer to the software configuration guide.


Defaults

There are no specific conditions that deny packets in the named or numbered IP ACL.

The default ACL is always terminated by an implicit deny statement for all packets.

Command Modes

Access-list configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Use this command after the ip access-list global configuration command to specify deny conditions for an IP ACL. You can specify a source IP address, destination IP address, IP protocol, TCP port, or UDP port. Specify the TCP and UDP port numbers only if protocol is tcp or udp and operator is eq.


Note For more information about configuring IP ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to create an extended IP ACL and to configure deny conditions for it:

Switch(config)# ip access-list extended Internetfilter
Switch(config-ext-nacl)# deny tcp host 190.5.88.10 any
Switch(config-ext-nacl)# deny tcp host 192.1.10.10 any

This is an example of a standard ACL that sets a deny condition:

ip access-list standard Acclist1
 deny 192.5.34.0  0.0.0.255
 deny 128.88.10.0  0.0.0.255
 deny 36.1.1.0  0.0.0.255

Note In these examples, all other IP access is implicitly denied.


You can verify your settings by entering the show ip access-lists or show access-lists privileged EXEC command.

Related Commands

Command
Description

ip access-list

Defines an IP ACL.

permit (access-list configuration)

Sets conditions for an IP ACL.

ip access-group

Controls access to an interface.

show ip access-lists

Displays IP ACLs configured on the switch.

show access-lists

Displays ACLs configured on a switch.


deny (MAC access-list configuration)

Use the deny MAC access-list configuration command to prevent Layer 2 traffic from being forwarded if the conditions are matched. Use the no form of the command to remove a deny condition from the MAC named access control list (ACL).

{permit | deny} {any | host src-MAC-addr} {any | host dst-MAC-addr} [aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | mop-console | mop-dump | msdos | mumps | netbios | vines-echo |vines-ip | xns-idp]

no {permit | deny} {any | host src-MAC-addr} {any | host dst-MAC-addr} [aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | mop-console | mop-dump | msdos | mumps | netbios | vines-echo |vines-ip | xns-idp]

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

any

Keyword to deny any source or destination MAC address.

host src-MAC-addr

Define a host MAC address. If the source address for a packet matches the defined address, traffic from that address is denied. MAC address-based subnets are not allowed.

host dst-MAC-addr

Define a destination MAC address. If the destination address for a packet matches the defined address, traffic to that address is denied. MAC address-based subnets are not allowed.

aarp

Select Ethertype AppleTalk Address Resolution Protocol that maps a data-link address to a network address.

amber

Select EtherType DEC-Amber.

appletalk

Select EtherType AppleTalk/EtherTalk.

dec-spanning

Select EtherType Digital Equipment Corporation (DEC) spanning tree.

decnet-iv

Select EtherType DECnet Phase IV protocol.

diagnostic

Select EtherType DEC-Diagnostic.

dsm

Select EtherType DEC-DSM.

etype-6000

Select EtherType 0x6000.

etype-8042

Select EtherType 0x8042.

lat

Select EtherType DEC-LAT.

lavc-sca

Select EtherType DEC-LAVC-SCA.

mop-console

Select EtherType DEC-MOP Remote Console.

mop-dump

Select EtherType DEC-MOP Dump.

msdos

Select EtherType DEC-MSDOS.

mumps

Select EtherType DEC-MUMPS.

netbios

Select EtherType DEC-Network Basic Input/Output System (NETBIOS).

vines-echo

Select EtherType Virtual Integrated Network Service (VINES) Echo from Banyan Systems.

vines-ip

Select EtherType VINES IP.

xns-idp

Select EtherType Xerox Network Systems (XNS) protocol suite (from 0 to 65535), an arbitrary Ethertype in decimal, hexadecimal, or octal.


Defaults

This command has no defaults. However, the default action for a MAC named ACL is to deny.

Command Modes

MAC access-list configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

When an access control entry (ACE) is added to an ACL, an implied deny-any-any condition exists at the end of the list. That is, if there are no matches, the packets are denied. However, before the first ACE is added, the list permits all packets.

These options are not allowed:

Class of service (CoS)

Ethertype number of a packet with Ethernet II or Subnetwork Access Protocol (SNAP) encapsulation

Link Service Access Point (LSAP) number of a packet with 802.2 encapsulation


Note For more information about configuring MAC extended ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to define the MAC named extended ACL to deny NETBIOS traffic from any source to MAC address 00c0.00a0.03fa. Traffic matching this list is denied.

Switch(config-ext-macl)# deny any host 00c0.00a0.03fa netbios

This example shows how to remove the deny condition from the named MAC extended ACL:

Switch(config-ext-macl)# no deny any host 00c0.00a0.03fa netbios

You can verify your settings by entering the show access-lists privileged EXEC command.

Related Commands

Command
Description

mac access-list extended

Creates an ACL based on MAC addresses for non-IP traffic.

permit (MAC access-list configuration)

Permits Layer 2 traffic to be forwarded if conditions are matched.

show access-lists

Displays ACLs configured on a switch.


dot1x default

Use the dot1x default global configuration command to reset the global 802.1X parameters to their default values.

dot1x default

Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default setting.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Examples

This example shows how to reset the global 802.1X parameters:

Switch(config)# dot1x default

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

dot1x max-req

Sets the maximum number of times that the switch sends an Extensible Authentication Protocol (EAP)-request/identity frame before restarting the authentication process.

dot1x re-authentication

Enables periodic re-authentication of the client.

dot1x timeout quiet-period

Sets the number of seconds that the switch remains in the quiet state following a failed authentication exchange.

dot1x timeout re-authperiod

Sets the number of seconds between re-authentication attempts.

dot1x timeout tx-period

Sets the number of seconds that the switch waits for a response to an EAP-request/identity frame from the client before retransmitting the request.

show controllers lre version

Displays the 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x max-req

Use the dot1x max-req global configuration command to set the maximum number of times that the switch sends an Extensible Authentication Protocol (EAP)-request/identity frame (assuming that no response is received) before restarting the authentication process. Use the no form of this command to return to the default setting.

dot1x max-req count

no dot1x max-req

Syntax Description

count

Number of times that the switch sends an EAP-request/identify frame before restarting the authentication process. The range is 1 to 10.


Defaults

The default is 2 times.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You should change the default value of this command only to adjust for unusual circumstances such as unreliable links or specific behavioral problems with certain clients and authentication servers.

Examples

This example shows how to set the number of times that the switch sends an EAP-request/identity frame to 5 before restarting the authentication process:

Switch(config)# dot1x max-req 5

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

dot1x timeout tx-period

Sets the number of seconds that the switch waits for a response to an EAP-request/identity frame from the client before retransmitting the request.

show controllers lre version

Displays the 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x multiple-hosts

Use the dot1x multiple-hosts interface configuration command to allow multiple hosts (clients) on an 802.1X-authorized port that has the dot1x port-control interface configuration command set to auto. Use the no form of this command to return to the default setting.

dot1x multiple-hosts

no dot1x multiple-hosts

Syntax Description

This command has no arguments or keywords.

Defaults

Multiple hosts are disabled.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

This command enables you to attach multiple clients to a single 802.1X-enabled port. In this mode, only one of the attached hosts must be successfully authorized for all hosts to be granted network access. If the port becomes unauthorized (re-authentication fails, or an Extensible Authentication Protocol over LAN [EAPOL]-logoff message is received), all attached clients are denied access to the network.

Examples

This example shows how to enable 802.1X on Fast Ethernet interface 0/1 and to allow multiple hosts:

Switch(config)# interface fastethernet0/1
Switch(config-if)# dot1x port-control auto
Switch(config-if)# dot1x multiple-hosts

You can verify your settings by entering the show dot1x [interface interface-id] privileged EXEC command.

Related Commands

Command
Description

dot1x port-control

Enables manual control of the authorization state of the port.

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x port-control

Use the dot1x port-control interface configuration command to enable manual control of the authorization state of the port. Use the no form of this command to return to the default setting.

dot1x port-control {auto | force-authorized | force-unauthorized}

no dot1x port-control

Syntax Description

auto

Enable 802.1X authentication on the interface and cause the port to transition to the authorized or unauthorized state based on the 802.1X authentication exchange between the switch and the client.

force-authorized

Disable 802.1X authentication on the interface and cause the port to transition to the authorized state without any authentication exchange required. The port transmits and receives normal traffic without 802.1X-based authentication of the client.

force-unauthorized

Deny all access through this interface by forcing the port to transition to the unauthorized state, ignoring all attempts by the client to authenticate. The switch cannot provide authentication services to the client through the interface.


Defaults

The authorization state is force-authorized.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The 802.1X protocol is supported on Layer 2 static-access ports.

You can use the auto keyword only if the port is not configured as one of these:

Trunk port—If you try to enable 802.1X on a trunk port, an error message appears, and 802.1X is not enabled. If you try to change the mode of an 802.1X-enabled port to trunk, the port mode is not changed.

Dynamic port—A port in dynamic mode can negotiate with its neighbor to become a trunk port. If you try to enable 802.1X on a dynamic port, an error appears, and 802.1X is not enabled. If you try to change the mode of an 802.1X-enabled port to dynamic, the port mode is not changed.

Dynamic-access port—If you try to enable 802.1X on a dynamic-access (VLAN Query Protocol [VQP]) port, an error appears, and 802.1X is not enabled. If you try to change an 802.1X-enabled port to dynamic VLAN assignment, an error appears, and the VLAN configuration is not changed.

EtherChannel port—Before enabling 802.1X on the port, you must first remove it from the EtherChannel. If you try to enable 802.1X on an EtherChannel or on an active port in an EtherChannel, an error appears, and 802.1X is not enabled. If you enable 802.1X on a not-yet active port of an EtherChannel, the port does not join the EtherChannel.

Secure port—You cannot configure a secure port as an 802.1X port. If you try to enable 802.1X on a secure port, an error appears, and 802.1X is not enabled. If you try to change an 802.1X-enabled port to a secure port, an error appears, and the security settings are not changed.

Switch Port Analyzer (SPAN) destination port—You can enable 802.1X on a port that is a SPAN destination port; however, 802.1X is disabled until the port is removed as a SPAN destination. You can enable 802.1X on a SPAN source port.

To globally disable 802.1X on the switch, you must disable it on each port. There is no global configuration command for this task.

Examples

This example shows how to enable 802.1X on Fast Ethernet interface 0/1:

Switch(config)# interface fastethernet0/1
Switch(config-if)# dot1x port-control auto

You can verify your settings by entering the show dot1x privileged EXEC command and checking the Status column in the 802.1X Port Summary section of the output. An enabled status means the port-control value is set either to auto or to force-unauthorized.

Related Commands

Command
Description

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x re-authenticate

Use the dot1x re-authenticate privileged EXEC command to manually initiate a re-authentication of all 802.1X-enabled ports or the specified 802.1X-enabled port.

dot1x re-authenticate [interface interface-id]

Syntax Description

interface interface-id

(Optional) Slot and port number of the interface to re-authenticate.


Defaults

There is no default setting.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You can use this command to re-authenticate a client without waiting for the configured number of seconds between re-authentication attempts (re-authperiod) and automatic re-authentication.

Examples

This example shows how to manually re-authenticate the device connected to Fast Ethernet interface 0/1:

Switch# dot1x re-authenticate interface fastethernet0/1
Starting reauthentication on FastEthernet0/1.

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x re-authentication

Use the dot1x re-authentication global configuration command to enable periodic re-authentication of the client. Use the no form of this command to return to the default setting.

dot1x re-authentication

no dot1x re-authentication

Syntax Description

This command has no arguments or keywords.

Defaults

Periodic re-authentication is disabled.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You configure the amount of time between periodic re-authentication attempts by using the dot1x timeout re-authperiod global configuration command.

Examples

This example shows how to disable periodic re-authentication of the client:

Switch(config)# no dot1x re-authentication

This example shows how to enable periodic re-authentication and set the number of seconds between re-authentication attempts to 4000 seconds:

Switch(config)# dot1x re-authentication
Switch(config)# dot1x timeout re-authperiod 4000

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

dot1x timeout re-authperiod

Sets the number of seconds between re-authentication attempts.

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x timeout quiet-period

Use the dot1x timeout quiet-period global configuration command to set the number of seconds that the switch remains in the quiet state following a failed authentication exchange (for example, the client provided an invalid password). Use the no form of this command to return to the default setting.

dot1x timeout quiet-period seconds

no dot1x timeout quiet-period

Syntax Description

seconds

Time in seconds that the switch remains in the quiet state following a failed authentication exchange with the client. The range is 0 to 65535 seconds.


Defaults

The default time is 60 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

During the quiet period, the switch does not accept or initiate any authentication requests.

You should change the default value of this command only to adjust for unusual circumstances such as unreliable links or specific behavioral problems with certain clients and authentication servers.

If you want to provide a faster response time to the user, enter a smaller number than the default.

Examples

This example shows how to set the quiet time on the switch to 30 seconds:

Switch(config)# dot1x timeout quiet-period 30

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x timeout re-authperiod

Use the dot1x timeout re-authperiod global configuration command to set the number of seconds between re-authentication attempts. Use the no form of this command to return to the default setting.

dot1x timeout re-authperiod seconds

no dot1x timeout re-authperiod

Syntax Description

seconds

Number of seconds between re-authentication attempts. The range is 1 to 4294967295.


Defaults

The default is 3600 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The dot1x timeout re-authperiod global configuration command affects the behavior of the switch only if you have enabled periodic re-authentication by using the dot1x re-authentication global configuration command.

You should change the default value of this command only to adjust for unusual circumstances such as unreliable links or specific behavioral problems with certain clients or authentication servers.

Examples

This example shows how to enable periodic re-authentication and set the number of seconds between re-authentication attempts to 4000 seconds:

Switch(config)# dot1x re-authentication
Switch(config)# dot1x timeout re-authperiod 4000

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

dot1x re-authentication

Enables periodic re-authentication of the client.

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


dot1x timeout tx-period

Use the dot1x timeout tx-period global configuration command to set the number of seconds that the switch waits for a response to an Extensible Authentication Protocol (EAP)-request /identity frame from the client before retransmitting the request. Use the no form of this command to return to the default setting.

dot1x timeout tx-period seconds

no dot1x timeout tx-period

Syntax Description

seconds

Time in seconds that the switch should wait for a response to an EAP-request/identity frame from the client before retransmitting the request. The range is 1 to 65535 seconds.


Defaults

The default is 30 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You should change the default value of this command only to adjust for unusual circumstances such as unreliable links or specific behavioral problems with certain clients or authentication servers.

Examples

This example shows how to set 60 as the number of seconds that the switch waits for a response to an EAP-request/identity frame from the client before retransmitting the request:

Switch(config)# dot1x timeout tx-period 60

You can verify your settings by entering the show dot1x privileged EXEC command.

Related Commands

Command
Description

dot1x max-req

Sets the maximum number of times that the switch sends an EAP-request/identity frame before restarting the authentication process.

show controllers lre version

Displays 802.1X statistics, administrative status, and operational status for the switch or for the specified interface.


duplex

Use the duplex interface configuration command to specify the duplex mode of operation for non-Long Reach Ethernet (LRE) switch ports. Use the no form of this command to return the port to its default value.

duplex {auto | full | half}

no duplex

Syntax Description

auto

Port automatically detects whether it should run in full- or half-duplex mode.

full

Port is in full-duplex mode.

half

Port is in half-duplex mode.


Defaults

For Fast Ethernet and 10/100/1000 ports, the default is auto.

For 100BASE-FX ports, the default is full.

For the default duplex mode of the Gigabit Interface Converter (GBIC)-module ports, refer to the documentation that came with your GBIC module.

For small, form-factor pluggable (SFP) Gigabit ports, the default is auto.

Command Modes

Interface configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Applicability of this command is hardware-dependent.

Non-LRE Switches:

Certain ports, such as GBIC module ports, can be configured are either full duplex or half duplex. The applicability of this command depends on the device to which the switch is attached.

The 100BASE-FX ports on Catalyst 2950C-24 switches do not support the duplex command. These ports only operate in full-duplex and 100-Mbps mode.

For Fast Ethernet ports, setting the port to auto has the same effect as specifying half if the attached device does not autonegotiate the duplex parameter.

If the speed is set to auto, the switch negotiates with the device at the other end of the link for the speed setting and then forces the speed setting to the negotiated value. The duplex setting remains as configured on each end of the link, which could result in a duplex setting mismatch.


Note The 10/100/1000 ports can operate only in the full-duplex mode.


If both the speed and duplex are set to specific values, autonegotiation is disabled.

LRE Switches:

For Long-Reach Ethernet (LRE) switches, this command configures both the MAC and LRE chipset.

In the default configurations, LRE Gigabit ports are set to auto. A copper connection (10|100|1000) autonegotiates with the device at the other end of the link for the duplex setting and then forces the duplex setting to the negotiated value. A fiber-optic connection (SFP) also autonegotiates with the device at the other end of the link but only accepts a connection at full duplex.

The duplex setting for a Gigabit Ethernet port has a close relationship to the setting for speed. Fiber is always forced to 1000 Mbps full duplex. Copper can run at either full duplex or half duplex for 10|100 Mbps but is forced to full duplex for 1000 Mbps. When you force speed and duplex settings, autonegotiation is disabled, and speed and duplex settings can cause a mismatch.


Note For guidelines on setting the switch speed and duplex parameters, refer to the Catalyst 2950 Desktop Switch Hardware Installation Guide.


Examples

This example shows how to set a Fast Ethernet port to half duplex:

Switch(config)# interface fastethernet0/11
Switch(config-if)# duplex half

This example shows how to set a Gigabit Ethernet port to full duplex:

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# duplex full

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

Command
Description

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.

local duplex

Specifies the LRE port speed.

cpe duplex

Sets the duplex setting for customer premises equipment (CPE) Ethernet ports.


errdisable detect

Use the errdisable detect global configuration command to enable error disable detection. Use the no form of this command to disable this feature.

errdisable detect cause {all | dtp-flap | gbic-invalid | link-flap | pagp-flap}

no errdisable detect cause {all | dtp-flap | gbic-invalid | link-flap | pagp-flap}

Syntax Description

all

Enable detection for all error disable causes.

dtp-flap

Enable detection for the Dynamic Trunking Protocol (DTP)- flap cause.

gbic-invalid

Enable error detection for an invalid GBIC error-disable cause.

link-flap

Enable detection for the link flap cause.

pagp-flap

Enable detection for the Port Aggregation Protocol (PAgP)-flap cause.


Defaults

The default is all, enabled for all causes.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.

12.1(9)EA1

The bpduguard, rootguard, and udld keywords were removed. The gbic-invalid keyword was added.


Usage Guidelines

A cause (dtp-flap, gbic-invalid, link-flap, and pagp-flap) is the reason why the error-disabled state occurred. When a cause is detected on an interface, the interface is placed in error-disabled state, an operational state similar to link-down state. If you do not enable errdisable recovery for the cause, the interface stays in the error-disabled state until you enter the shutdown and no shutdown interface configuration commands. If you enable the recovery for a cause, the interface is brought out of the error-disabled state and allowed to retry the operation again when all the causes have timed out.

You must enter the shutdown and then the no shutdown commands to manually recover an interface from the error-disabled state.

Examples

This example shows how to enable error disable detection for the link-flap error-disable cause:

Switch(config)# errdisable detect cause link-flap

You can verify your settings by entering the show errdisable detect privileged EXEC command.

Related Commands

Command
Description

errdisable recovery

Configures the recovery mechanism variables.

show errdisable detect

Displays errdisable detection status.

show interfaces trunk

Displays interface status or a list of interfaces in error-disabled state.


errdisable recovery

Use the errdisable recovery global configuration command to configure the recover mechanism variables. Use the no form of this command to return to the default setting.

errdisable recovery {cause {all | bpduguard | dtp-flap | gbic-invalid | link-flap | pagp-flap | psecure-violation | udld} | {interval interval}

no errdisable recovery {cause {all | bpduguard | dtp-flap | gbic-invalid | link-flap | pagp-flap | psecure-violation | udld} | {interval interval}

Syntax Description

cause

Enable error disable to recover from a specific cause.

all

Enable the timer to recover from all error-disable causes.

bpduguard

Enable the timer to recover from the bridge protocol data unit (BPDU)-guard error-disable state.

dtp-flap

Enable the timer to recover from the Dynamic Trunking Protocol (DTP)-flap error-disable state.

gbic-invalid

Enable the timer to recover from an invalid GBIC error disable state.

link-flap

Enable the timer to recover from the link-flap error-disable state.

pagp-flap

Enable the timer to recover from the Port Aggregation Protocol (PAgP)-flap error-disable state.

psecure-violation

Enable the timer to recover from a port security violation disable state.

udld

Enable the timer to recover from the UniDirectional Link Detection (UDLD) error-disable state.

interval interval

Specify the time to recover from specified error-disable state. The range is 30 to 86400 seconds. The same interval is applied to all causes. The default interval is 300 seconds.

Note The errdisable recovery timer initializes at a random differential from the configured interval value. The difference between the actual timeout value and the configured value can be up to 15 percent of the configured interval.



Note Though visible in the command-line help string, the channel-misconfig keyword is not supported.


Defaults

Recovery is disabled for all causes.

The default interval is 300 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.

12.1(9)EA1

The gbic-invalid and psecure-violation keywords were added. The rootguard keyword was removed.


Usage Guidelines

A cause (bpduguard, dtp-flap, gbic-invalid, link-flap, pagp-flap, psecure-violation, and udld) is defined as the reason why the error-disabled state occurred. When a cause is detected on an interface, the interface is placed in error-disabled state, an operational state similar to link-down state. If you do not enable errdisable recovery for the cause, the interface stays in error-disabled state until you enter a shutdown and no shutdown interface configuration command. If you enable the recovery for a cause, the interface is brought out of the error-disabled state and allowed to retry the operation again when all the causes have timed out.

Otherwise, you must enter the shutdown then no shutdown commands to manually recover an interface from the error-disabled state.

Examples

This example shows how to enable the recovery timer for the BPDU guard error-disable cause:

Switch(config)# errdisable recovery cause bpduguard

This example shows how to set the timer to 500 seconds:

Switch(config)# errdisable recovery interval 500

You can verify your settings by entering the show errdisable recovery privileged EXEC command.

Related Commands

Command
Description

show errdisable recovery

Displays errdisable recovery timer information.

show interfaces status

Displays interface status.


flowcontrol

Use the flowcontrol interface configuration command to set the receive or send flow-control value for an interface. When flow control send is on for a device and it detects any congestion at its end, it notifies the link partner or the remote device of the congestion by sending a pause frame. When flow control receive is on for the remote device and it receives a pause frame, it stops sending any data packets. This prevents any loss of data packets during the congestion period.

Use the receive off and send off keywords to disable flow control.

flowcontrol {receive | send} {desired | off | on}


Note This flowcontrol command applies only to 10/100/1000 ports and Gigabit Interface Converter (GBIC)-module ports on the switches.


Syntax Description

receive

Sets whether the interface can receive flow-control packets from a remote device.

send

Sets whether the interface can send flow-control packets to a remote device.

desired

When used with receive, allows an interface to operate with an attached device that is required to send flow-control packets or with an attached device that is not required to but can send flow-control packets.
When used with send, the interface sends flow-control packets to a remote device if the remote device supports it.

off

When used with receive, turns off an attached device's ability to send flow-control packets to an interface. When used with send, turns off the local port's ability to send flow-control packets to a remote device.

on

When used with receive, allows an interface to operate with an attached device that is required to send flow-control packets or with an attached device that is not required to but can send flow-control packets.
When used with send, the interface sends flow-control packets to a remote device if the remote device supports it.


Defaults

The defaults for 10/100/1000 and GBIC-module ports are flowcontrol receive off and flowcontrol send desired.

Command Modes

Interface configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.

12.1(6)EA2

The asymmetric and symmetric keywords were replaced with the receive, send, off, on, and desired keywords.


Usage Guidelines

Use the flowcontrol command only on 10/100/1000 and GBIC-module ports.

We strongly recommend that you do not configure IEEE 802.3X flowcontrol when quality of service (QoS) is configured on the switch. Before configuring flowcontrol on an interface, make sure to disable QoS on the switch.

Note that when used with receive, the on and desired keywords have the same result.

When you use the flowcontrol command to set a port to control traffic rates during congestion, you are setting flow control on a port to one of these conditions:

receive on and send on: Flow control operates in both directions; pause frames can be sent by both the local device and the remote device to show link congestion.

receive on and send desired: The port can receive pause frames and is able to send pause frames if the attached device supports them.

receive on and send off: The port cannot send pause frames, but can operate with an attached device that is required to or is able to send pause frames; the port is able to receive pause frames.

receive off and send on: The port sends pause frames if the remote device supports them, but cannot receive pause frames from the remote device.

receive off and send desired: The port cannot receive pause frames, but can send pause frames if the attached device supports them.

receive off and send off: Flow control does not operate in either direction. In case of congestion, no indication is given to the link partner, and no pause frames are sent or received by either device.

Table 2-3 shows the flow control resolution achieved on local and remote ports by a combination of settings. The table assumes that for receive, using the desired keyword has the same results as using the on keyword.

Table 2-3 Flow Control Settings and Local and Remote Port Flow Control Resolution 

Flow Control Settings
Flow Control Resolution
Local Device
Remote Device
Local Device
Remote Device

send on/receive on

send on/receive on

send on/receive off

send desired/receive on

send desired/receive off

send off/receive on

send off/receive off

Sends and receives

Does not send or receive

Sends and receives

Does not send or receive

Sends and receives

Does not send or receive

Sends and receives

Does not send or receive

Sends and receives

Does not send or receive

Receives only

Does not send or receive

send on/receive off

send on/receive on

send on/receive off

send desired/receive on

send desired/receive off

send off/receive on

send off/receive off

Does not send or receive

Does not send or receive

Sends only

Does not send or receive

Sends only

Does not send or receive

Does not send or receive

Does not send or receive

Receives only

Does not send or receive

Receives only

Does not send or receive

send desired/receive on

send on/receive on

send on/receive off

send desired/receive on

send desired/receive off

send off/receive on

send off/receive off

Sends and receives

Receives only

Sends and receives

Receives only

Sends and receives

Does not send or receive

Sends and receives

Sends only

Sends and receives

Sends only

Receives only

Does not send or receive

send desired/receive off

send on/receive on

send on/receive off

send desired/receive on

send desired/receive off

send off/receive on

send off/receive off

Does not send or receive

Does not send or receive

Sends only

Does not send or receive

Sends only

Does not send or receive

Does not send or receive

Does not send or receive

Receives only

Does not send or receive

Receives only

Does not send or receive

send off/receive on

send on/receive on

send on/receive off

send desired/receive on

send desired/receive off

send off/receive on

send off/receive off

Receives only

Receives only

Receives only

Receives only

Receives only

Does not send or receive

Sends and receives

Sends only

Sends and receives

Sends only

Receives only

Does not send or receive

send off/receive off

send on/receive on

send on/receive off

send desired/receive on

send desired/receive off

send off/receive on

send off/receive off

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive

Does not send or receive


Examples

This example shows how to configure the local port to not support any level of flow control by the remote port:

Switch(config-if)# flowcontrol receive off
Switch(config-if)# flowcontrol send off

You can verify your settings by entering the show interfaces counters privileged EXEC command.

Related Commands

Command
Description

show interfaces counters

Displays the interface settings on a switch, including input and output flow control.


hw-module slot module-slot # upgrade lre

Use the hw-module slot module-slot # lre upgrade lre privileged EXEC command to perform firmware upgrades on Long-Reach Ethernet (LRE) systems.

hw-module slot module-slot # upgrade lre [force] [{local ctrlr unit # | remote interface-id}]

Syntax Description

module-slot #

Physical slot that connects the local (LRE switch) and remote (customer premises equipment [CPE] device) of the upgrade.

force

(Optional) LRE binaries update by force, even when the version of the LRE binary on the switch Flash memory and the LRE binary in use are the same.

local ctrlr unit #

(Optional) The single LRE chipset for a controller at the local end of the LRE Ethernet link.

remote interface-id

(Optional) One or more chipsets on a single CPE device at the remote end of the LRE Ethernet link.


Defaults

No default is defined.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Use the hw-module slot module-slot # upgrade lre command to start an LRE upgrade. An LRE upgrade can be started in one of these ways:

Upgrade all LRE local chipsets (controllers) and remote CPE devices by entering the hw-module slot module-slot # upgrade lre command with no additional parameters.

Upgrade a single local LRE controller by entering the hw-module slot module-slot # lre upgrade command with the local parameter.

Upgrade a single remote LRE CPE device by entering the hw-module slot module-slot # lre upgrade command with the remote parameter.

You can use the force option to upgrade an LRE binary on a local LRE controller or a remote LRE CPE device, even though the device is already running the version of the desired LRE binary. The default behavior is not to upgrade LRE binaries that are already up to date.

During an upgrade, users on the LRE links being upgraded experience a temporary disruption of Ethernet connectivity. All LRE local and remote upgrades run concurrently and take 3 to 6 minutes to complete.

The IOS CLI remains available while an LRE upgrade is in progress.

Once started, an LRE upgrade can only be stopped by physically changing the remote CPE device or by reloading the IOS software on the Ethernet switch.

Under most circumstances, configuration for upgrades is not necessary.

Examples

This example shows how to start a system-wide LRE upgrade:

Switch# hw-module slot 0 upgrade lre

You are about to start an LRE upgrade on all LRE interfaces.
Users on LRE links being upgraded will experience a temporary
disruption of Ethernet connectivity.

Start LRE upgrade ? [yes]:

Starting remote upgrade on CPE Lo0/1.
Starting remote upgrade on CPE Lo0/2
Starting remote upgrade on CPE Lo0/3
Starting remote upgrade on CPE Lo0/4
Starting remote upgrade on CPE Lo0/5
Starting remote upgrade on CPE Lo0/6
Starting remote upgrade on CPE Lo0/7
Starting remote upgrade on CPE Lo0/8
Starting upgrade on local controller LongReachEthernet 0
Starting remote upgrade on CPE Lo0/9
Starting remote upgrade on CPE Lo0/10
Starting remote upgrade on CPE Lo0/11
Starting remote upgrade on CPE Lo0/12
Starting remote upgrade on CPE Lo0/13
Starting remote upgrade on CPE Lo0/14
Starting remote upgrade on CPE Lo0/15
Starting remote upgrade on CPE Lo0/16
Starting upgrade on local controller LongReachEthernet 1
Starting remote upgrade on CPE Lo0/17
Starting remote upgrade on CPE Lo0/18
Starting remote upgrade on CPE Lo0/19
Starting remote upgrade on CPE Lo0/20
Starting remote upgrade on CPE Lo0/21
Starting remote upgrade on CPE Lo0/22
Starting remote upgrade on CPE Lo0/23
Starting remote upgrade on CPE Lo0/24
Starting upgrade on local controller LongReachEthernet 2

This example shows how to start an LRE upgrade on a single LRE controller in a switch. In this example, LongRangeEthernet 0 causes an LRE upgrade to run on controller 0 in the switch.


Switch# hw-module slot 0 upgrade lre local lo 0
You are about to start an LRE upgrade on local controller LongReachEthernet 0.
Users on LRE links being upgraded will experience a temporary
disruption of Ethernet connectivity.

Start LRE upgrade ? [yes]:

Starting Upgrade on local controller LongReachEthernet 0

This example shows how to start an LRE upgrade on a single CPE device. In this example, LongRangeEthernet 0/1 causes an LRE upgrade to run on the CPE device connected to LRE link LongRangeEthernet 0/1.


Switch# hw-module slot 0 upgrade lre remote lo 0/1

You are about to start an LRE upgrade on CPE Lo0/1.
Users on LRE links being upgraded will experience a temporary
disruption of Ethernet connectivity.

Start LRE upgrade ? [yes]:

Starting remote upgrade on CPE Lo0/1

This example shows what happens when you attempt to update current firmware without using the force option.


Switch# hw-module slot 0 upgrade lre remote lo 0/1

You are about to start an LRE upgrade on CPE Lo0/1.
Users on LRE links being upgraded will experience a temporary
disruption of Ethernet connectivity.

Start LRE upgrade ? [yes]:

No upgrade required on CPE Lo0/1

This example shows the force option when attempting to update current firmware on a CPE:


Switch# hw-module slot 0 upgrade lre force remote lo 0/1

You are about to start an LRE upgrade on CPE Lo0/1.
Users on LRE links being upgraded will experience a temporary
disruption of Ethernet connectivity.

Start LRE upgrade ? [yes]:

Starting remote upgrade on CPE Lo0/1

Switch#

Related Commands

Command
Description

controller LongReachEthernet

Allows you to enter controller sub-mode.

show lre upgrade binaries

Displays the Long-Reach Ethernet (LRE) binaries present on the system Flash memory

show lre upgrade status

Displays the upgrade status on all ports in the switch.

show lre upgrade version

Displays the versions of binaries on local and remote ends on all ports.


interface

Use the interface global configuration command to configure an interface type, to create a switch virtual interface to be used as the management VLAN interface, and to enter interface configuration mode.

interface {interface-id | vlan number}

no interface {interface-id | vlan number}

Syntax Description

interface-id

Specify the interface type (Fast Ethernet, Gigabit Ethernet, Long-Reach Ethernet) and number.

vlan number

VLAN number from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed to be used as the management VLAN. Do not enter leading zeroes.


Defaults

The default management VLAN interface is VLAN 1.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

When creating a management VLAN interface, a space between vlan and number is accepted.

Only one management VLAN interface can be active.

You cannot delete the management VLAN 1 interface.

You can use the no shutdown interface configuration command to shut down the active management VLAN interface and to enable a new one.

You can configure the management VLAN interface on static-access and trunk ports.

Examples

This example shows how to enable the switch to configure interface 2:

Switch(config)# interface fastethernet0/2
Switch(config-if)#

This example shows how to change the management VLAN from the default management VLAN to VLAN 3. Enter this series of commands only from the console. If these commands are entered through a Telnet session, the shutdown command disconnects the session, and there is no way to use IP to access the system.

Switch# configure terminal
Switch(config)# interface vlan 3
Switch(config-if)# ip address 172.20.128.176 255.255.255.0
Switch(config-if)# no shutdown
Switch(config-if)# exit

You can verify your settings by entering the show interfaces and show interfaces vlan vlan-id privileged EXEC commands.

Related Commands

Command
Description

show interfaces

Displays the administrative and operational status of a switching (nonrouting) port.

shutdown

Disables a port and shuts down the management VLAN.


interface port-channel

Use the interface port-channel global configuration command to access or create the port-channel logical interface for Layer 2 interfaces. Use the no form of this command to remove the port channel.

interface port-channel port-channel-number

no interface port-channel port-channel-number

Syntax Description

port-channel-number

Port-channel number. The range is 1 to 6.


Defaults

No port-channel logical interfaces are defined.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Only one port channel in a channel group is allowed.

Follow these guidelines when you use the interface port-channel command:

If you want to use the Cisco Discovery Protocol (CDP), you must configure it only on the physical interface and not on the port-channel interface.

On the port-channel interface, if you do not assign a static MAC address or if you assign a static MAC address and then later remove it, the switch automatically assigns a MAC address to the interface.

Examples

This example shows how to create a port-channel interface with a port-channel number of 5:

Switch(config)# interface port-channel 5

You can verify your settings by entering the show running-config or show etherchannel channel-group-number detail privileged EXEC command.

Related Commands

Command
Description

channel-group

Assigns an Ethernet interface to an EtherChannel group.

show etherchannel

Displays EtherChannel information for a channel.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands


interface range

Use the interface range global configuration command to enter interface range configuration mode and to execute a command on multiple ports at the same time. Use the no form of this command to remove an interface range.

interface range {port-range | macro name}

no interface range {port-range | macro name}

Syntax Description

port-range

Port range. For a list of valid values for port-range, see the "Usage Guidelines" section.

macro name

Specify the name of a macro.


Defaults

This command has no default setting.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

From the interface range configuration mode, all interface parameters that you enter are applied to all interfaces within the range.

For VLANs, you can use the interface range command only on existing VLAN interfaces. To display VLAN interfaces, enter the show running-config privileged EXEC command. VLANs not displayed cannot be used in the interface range command. The commands that you enter under the interface range command are applied to all existing VLAN interfaces in the range.

All configuration changes made to an interface range are saved to nonvolatile RAM (NVRAM), but the interface range itself is not saved to NVRAM.

You can enter the interface range in two ways:

Specifying up to five interface ranges

Specifying a previously defined interface-range macro

You can define up to five interface ranges with a single command, with each range separated by a comma (,).

All interfaces in a range must be the same type; that is, all Fast Ethernet ports, all Gigabit Ethernet ports, all EtherChannel ports, or all VLANs.

These are the valid values for port-range type and interface:

vlan vlan-id, where vlan-id is from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed.

port-channel port-channel-number, where port-channel-number is from 1 to 6

fastethernet interface-id

gigabitethernet interface-id

For physical interfaces, the interface-id is defined as a slot/number (where slot is always 0 for the switch), and the range is entered as type 0/number - number (for example, gigabitethernet0/1 - 2). You can also enter multiple ranges.

When you define a range, you must enter a space before and after the hyphen (-):

interface range gigabitethernet0/1 - 2

When you define multiple ranges, you must enter a space before and after the comma (,):

interface range fastethernet0/3 - 7 , gigabitethernet0/1 - 2

You cannot specify both a macro and an interface range in the same command.

A single interface can also be specified in port-range. (The command is then similar to the interface interface-id global configuration command.)


Note For more information about configuring interface ranges, refer to the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to use the interface range command to enter interface range configuration mode and to enter commands for two ports:

Switch(config)# interface range gigabitethernet0/1 - 2
Switch(config-if-range)#

This example shows how to use the interface range command to enter interface range configuration mode and to enter commands for two Long-Reach Ethernet (LRE) ports:

Switch(config)# interface range lo0/1 -2
Switch(config-if-range)# 

This example shows how to use a port-range macro macro1 for the same function. The advantage is that you can reuse the macro1 until you delete it.

Switch(config)# define interface-range macro gigabitethernet0/1 - 2
Switch(config)# interface range macro macro1
Switch(config-if-range)#

Related Commands

Command
Description

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


ip access-group

Use the ip access-group interface configuration command to control access to an interface. Use the no form of this command to remove an access group from an interface.

ip access-group {access-list-number | name} in

no ip access-group {access-list-number | name} in

This command is available on physical interfaces only if your switch is running the enhanced software image (EI).

Syntax Description

access-list-number

Number of the IP access control list (ACL), from 1 to 199 or from 1300 to 2699.

name

Name of an IP ACL, specified in the ip access-list command.


Defaults

No ACL is applied to the interface.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You can apply IP ACLs only to ingress interfaces. If a MAC access group is already defined for an interface, you cannot apply this command to the interface.

The ACLs can be standard or extended.

For standard ACLs, after receiving a packet, the switch checks the packet source address. If the source address matches a defined address in the ACL and the list permits the address, the switch forwards the packet.

For extended ACLs, after receiving the packet, the switch checks the match conditions in the ACL. If the conditions are matched, the switch forwards the packet.

If the specified ACL does not exist, the switch forwards all packets.

IP access groups can be separated on Layer 2 and Layer 3 interfaces.


Note For more information about configuring IP ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to apply a numbered ACL to an interface:

Switch(config)# interface fastethernet0/1
Switch(config-if)# ip access-group 101 in

You can verify your settings by entering the show access-lists or show ip access-lists privileged EXEC command.

Related Commands

Command
Description

access-list (IP extended)

Defines an extended IP ACL.

access-list (IP standard)

Defines a standard IP ACL.

deny (access-list configuration)

Configures conditions for an IP ACL.

ip access-list

Defines an IP ACL.

permit (access-list configuration)

Configures conditions for an IP ACL.

show access-lists

Displays ACLs configured on the switch.

show ip access-lists

Displays IP ACLs configured on the switch.


ip access-list

Use the ip access-list global configuration command to create an IP access control list (ACL) to be used for matching packets to an ACL whose name or number you specify and to enter access-list configuration mode. Use the no form of this command to delete an existing IP ACL and return to global configuration mode.

ip access-list {extended | standard} {access-list-number | name}

no ip access-list {extended | standard} {access-list-number | name}

This command is available on physical interfaces only if your switch is running the enhanced software image (EI).

Syntax Description

access-list-number

Number of an ACL.

For standard IP ACLs, the range is from 1 to 99 and 1300 to 1999.

For extended IP ACLs, the range from 100 to 199 and from 2000 to 2699.

name

Name of an ACL.

Note The ACL name must begin with an alphabetic character to prevent ambiguity with numbered ACLs. A name also cannot contain a space or quotation mark.


Defaults

No named or numbered IP ACLs are defined.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Use this command to enter access-list configuration mode and to specify the name or number of the IP ACL for which you want to create or modify ACL match criteria. In this mode, you must enter the permit and deny commands to configure the permit and deny access conditions for this list.

Use the ip access-list command and its subcommands to define packet classification and marking as part of a globally-named service policy applied on a per-interface basis or as an IP access group applied on a per-interface basis.

Specifying standard or extended with the ip access-list command determines the prompt that you get when you enter access-list configuration mode.


Note For more information about configuring IP ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to configure a standard ACL named Internetfilter1:

Switch(config)# ip access-list standard Internetfilter1
Switch(config-std-nacl)# permit 192.5.34.0  0.0.0.255
Switch(config-std-nacl)# permit 192.5.32.0  0.0.0.255
Switch(config-std-nacl)# exit

This example shows how to configure an extended ACL named Internetfilter2:

Switch(config)# ip access-list extended Internetfilter2
Switch(config-ext-nacl)# permit any 128.8.10.0  0.0.0.255 eq 80
Switch(config-ext-nacl)# permit any 128.5.8.0  0.0.0.255 eq 80
Switch(config-ext-nacl)# exit


Note In these examples, all other IP access is implicitly denied.


You can verify your settings by entering the show access-lists or show ip access-lists privileged EXEC command.

Related Commands

Command
Description

deny (access-list configuration)

Configures conditions for an IP ACL.

ip access-group

Controls access to an interface.

permit (access-list configuration)

Configures conditions for an IP ACL.

service-policy

Applies a policy map to the input of an interface.

show access-lists

Displays ACLs configured on the switch.

show ip access-lists

Displays IP ACLs configured on the switch.


ip address

Use the ip address interface configuration command to set an IP address for a switch. Use the no form of this command to remove an IP address or to disable IP processing.

ip address ip-address subnet-mask

no ip address ip-address subnet-mask

Syntax Description

ip-address

IP address.

subnet-mask

Mask for the associated IP subnet.


Defaults

No IP address is defined for the switch.

Command Modes

Interface configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

A switch can have one IP address.

The IP address of the switch can be accessed only by nodes connected to ports that belong to the management VLAN. By default, the management VLAN is VLAN 1, but you can configure a different VLAN as the management VLAN.

If you remove the IP address through a Telnet or Secure Shell (SSH) session, your connection to the switch is lost.

If your switch receives its IP address from a Bootstrap Protocol (BOOTP) or a Dynamic Host Configured Protocol (DHCP) server and you remove the switch IP address by using the no ip address command, IP processing is disabled, and the BOOTP or DHCP server cannot reassign the address.

Examples

This example shows how to configure the IP address for the switch on a subnetted network:

Switch(config)# interface vlan 1
Switch(config-if)# ip address 172.20.128.2 255.255.255.0 

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

Command
Description

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


ip igmp snooping

Use the ip igmp snooping global configuration command to globally enable Internet Group Management Protocol (IGMP) snooping. Use the no form of this command to disable IGMP snooping.

ip igmp snooping

no ip igmp snooping

Syntax Description

This command has no arguments or keywords.

Defaults

By default, IGMP snooping is globally enabled.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

When IGMP snooping is globally enabled, it enables IGMP snooping on all the existing VLAN interfaces. When IGMP snooping is globally disabled, it disables IGMP snooping on all the existing VLAN interfaces.

The configuration is saved in nonvolatile RAM (NVRAM).

Examples

This example shows how to globally enable IGMP snooping:

Switch(config)# ip igmp snooping

This example shows how to globally disable IGMP snooping:

Switch(config)# no ip igmp snooping

You can verify your settings commands by entering the show ip igmp snooping privileged EXEC command.

Related Commands

Command
Description

ip igmp snooping vlan

Enables IGMP snooping on a VLAN interface.

ip igmp snooping vlan immediate-leave

Enables IGMP Immediate-Leave processing.

ip igmp snooping vlan mrouter

Configures a Layer 2 port as a multicast router port.

ip igmp snooping vlan static

Configures a Layer 2 port as a member of a group.

show ip igmp snooping

Displays the IGMP snooping configuration.


ip igmp snooping vlan

Use the ip igmp snooping vlan global configuration command to enable Internet Group Management Protocol (IGMP) snooping on a specific VLAN. Use the no form of this command to disable IGMP snooping on a VLAN interface.

ip igmp snooping vlan vlan-id

no ip igmp snooping vlan vlan-id

Syntax Description

vlan-id

VLAN ID. The range is from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.


Defaults

By default, IGMP snooping is enabled when each VLAN is created.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

This command automatically configures the VLAN if it is not already configured. The configuration is saved in nonvolatile RAM (NVRAM).

Examples

This example shows how to enable IGMP snooping on VLAN 2:

Switch(config)# ip igmp snooping vlan 2

This example shows how to disable IGMP snooping on VLAN 2:

Switch(config)# no ip igmp snooping vlan 2

You can verify your settings by entering the show ip igmp snooping vlan privileged EXEC command.

Related Commands

Command
Description

ip igmp snooping

Globally enables IGMP snooping. IGMP snooping must be globally enabled in order to be enabled on a VLAN.

ip igmp snooping vlan immediate-leave

Enables IGMP Immediate-Leave processing.

ip igmp snooping vlan mrouter

Configures a Layer 2 port as a multicast router port.

ip igmp snooping vlan static

Configures a Layer 2 port as a member of a group.

show ip igmp snooping

Displays the IGMP snooping configuration.


ip igmp snooping vlan immediate-leave

Use the ip igmp snooping immediate-leave global configuration command to enable Internet Group Management Protocol (IGMP) Immediate-Leave processing on a VLAN interface. Use the no form of this command to disable Immediate-Leave processing on the VLAN interface.

ip igmp snooping vlan vlan-id immediate-leave

no ip igmp snooping vlan vlan-id immediate-leave

Syntax Description

vlan-id

VLAN ID value. The range is between 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.


Defaults

By default, IGMP Immediate-Leave processing is disabled.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

Use the Immediate-Leave feature only when there is only one IP multicast receiver present on every port in the VLAN. The Immediate-Leave configuration is saved in nonvolatile RAM (NVRAM).

The Immediate-Leave feature is supported only with IGMP version 2 hosts.

Examples

This example shows how to enable IGMP Immediate-Leave processing on VLAN 1:

Switch(config)# ip igmp snooping vlan 1 immediate-leave

This example shows how to disable IGMP Immediate-Leave processing on VLAN 1:

Switch(config)# no ip igmp snooping vlan 1 immediate-leave

You can verify your settings by entering the show ip igmp snooping vlan privileged EXEC command.

Related Commands

Command
Description

ip igmp snooping

Enables IGMP snooping.

ip igmp snooping vlan mrouter

Configures a Layer 2 port as a multicast router port.

show ip igmp snooping

Displays the IGMP snooping configuration.

ip igmp snooping vlan static

Configures a Layer 2 port as a member of a group.

show mac address-table multicast

Displays the Layer 2 multicast entries for a VLAN.


ip igmp snooping vlan mrouter

Use the ip igmp snooping vlan mrouter global configuration command to add a multicast router port and to configure the multicast router learning method. Use the no form of this command to remove the configuration.

ip igmp snooping vlan vlan-id mrouter {interface interface-id | learn {cgmp | pim-dvmrp}}

no ip igmp snooping vlan vlan-id mrouter {interface interface-id | learn {cgmp | pim-dvmrp}}

Syntax Description

vlan vlan-id

Specify the VLAN ID. The range is from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.

interface interface-id

Specify the interface of the member port that is configured to a static router port.

learn

Specify the multicast router learning method.

cgmp

Set the switch to learn multicast router ports by snooping on Cisco Group Management Protocol (CGMP) packets.

pim-dvmrp

Set the switch to learn multicast router ports by snooping on IGMP queries and Protocol-Independent Multicasting-Distance Vector Multicast Routing Protocol (PIM-DVMRP) packets.


Defaults

The default learning method is pim-dvmrp.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

The CGMP learning method is useful for controlling traffic in Cisco router environments.

The configured learning method is saved in nonvolatile RAM (NVRAM).

Static connections to multicast routers are supported only on switch ports.

Examples

This example shows how to configure Fast Ethernet interface 0/6 as a multicast router port:

Switch(config)# ip igmp snooping vlan 1 mrouter interface fastethernet0/6

This example shows how to specify the multicast router learning method as CGMP:

Switch(config)# no ip igmp snooping vlan 1 mrouter learn cgmp

You can verify your settings by entering the show ip igmp snooping mrouter privileged EXEC command.

Related Commands

Command
Description

ip igmp snooping

Globally enables Internet Group Management Protocol (IGMP) snooping.

ip igmp snooping vlan

Enables IGMP snooping on the VLAN interface.

ip igmp snooping vlan immediate-leave

Configures IGMP Immediate-Leave processing.

ip igmp snooping vlan static

Configures a Layer 2 port as a member of a group.

show ip igmp snooping mrouter

Displays the statically and dynamically learned multicast router ports.


ip igmp snooping vlan static

Use the ip igmp snooping vlan vlan-id static global configuration command to add a Layer 2 port as a member of a multicast group. Use the no form of this command to remove the configuration.

ip igmp snooping vlan vlan-id static mac-address interface interface-id

no ip igmp snooping vlan vlan-id static mac-address interface interface-id

Syntax Description

vlan vlan-id

Specify the VLAN ID. The range is 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.

static mac-address

Specify the static group MAC address.

interface interface-id

Specify the interface configured to a static router port.


Defaults

None configured.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

The command is used to statically configure the IP multicast group member ports.

The static ports and groups are saved in nonvolatile RAM (NVRAM).

Static connections to multicast routers are supported only on switch ports.

Examples

This example shows how to statically configure a host on an interface:

Switch(config)# ip igmp snooping vlan 1 static 0100.5e02.0203 interface fastethernet0/6
Configuring port FastEthernet 0/6 on group 0100.5e02.0203

You can verify your settings by entering the show mac address-table multicast privileged EXEC command.

Related Commands

Command
Description

ip igmp snooping

Enables Internet Group Management Protocol (IGMP) snooping.

ip igmp snooping vlan

Enables IGMP snooping on the VLAN interface.

ip igmp snooping vlan immediate-leave

Configures IGMP Immediate-Leave processing.

ip igmp snooping vlan mrouter

Configures a Layer 2 port as a multicast router port.

show mac address-table multicast

Displays the Layer 2 multicast entries for a VLAN.


link monitor

Use the link monitor interface configuration command to enable Long-Reach Ethernet (LRE) link monitoring on a port. Use the no form of the command to disable LRE link monitoring on a port.

link monitor

no link monitor

Syntax Description

This command has no arguments or keywords.

Defaults

The default is link monitor.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

If the link is shut down, link monitor data is not collected.

Examples

This example shows how to enable LRE link monitoring on port 1.


Switch# configure terminal
Switch(config)# interface long 0/1
Switch(config-if)# link monitor
Switch(config-if)#

Related Commands

Command
Description

clear controllers lre link monitor

Deletes LRE link monitor data.

link monitor logging

Enables link monitor event logging per port.

link monitor threshold snr

Sets an signal-to-noise margin for the LRE link monitor.

link monitor threshold rserr

Sets a Reed-Solomon error threshold for the LRE link monitor.

show controllers lre link monitor errors

Displays Reed-Solomon and Ethenet errors captured by the LRE link monitor.

show controllers lre link monitor parameters

Displays the switch or customer premises equipment (CPE) device operating parameter data.

show controllers lre link monitor statistics

Displays the switch or CPE device statistical data.


link monitor logging

Use the link monitor logging interface configuration command to enable Long-Reach Ethernet (LRE) link monitoring event logging. Use the no form of the command to disable LRE link monitor logging.

link monitor logging

no link monitor logging

Syntax Description

This command has no arguments or keywords.

Defaults

The default is no link monitor logging.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Events are logged in the system log when a configured threshold is crossed.

Examples

This example shows how to enable LRE link monitoring logging on port 2.


Switch# configure terminal
Switch(config)# interface long 0/2
Switch(config-if)# link monitor logging
Switch(config-if)#

Command History

Command
Description

clear controllers lre link monitor

Deletes LRE link monitor data.

link monitor

Enables the LRE link monitor on a port.

link monitor threshold snr

Sets an signal-to-noise margin for the LRE link monitor.

link monitor threshold rserr

Sets a Reed-Solomon error threshold for the LRE link monitor.

show controllers lre link monitor errors

Displays Reed-Solomon and Ethenet errors captured by the LRE link monitor.

show controllers lre link monitor parameters

Displays the switch or CPE device operating parameter data.

show controllers lre link monitor statistics

Displays the switch or CPE device statistical data.


link monitor threshold rserr

Use the link monitor threshold rserr interface configuration command to establish threshold values for Reed-Solomon errors. Use the no form of the command to reset the threshold values to their defaults.

link monitor threshold rserr {downstream value | upstream value}

no link monitorthreshold rserr {downstream value | upstream value}

Syntax Description

value

The number of the Reed Solomon errors allowed per second. The valid range is from 0 to 25000.


Defaults

The default is 1000 errors per second.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

To compute threshold values, calculate the number of frames that can be sent for a particular bandwidth based on the Long-Reach Ethernet (LRE) profile. Use the show controller lre status profile command to determine the downstream and upstream data rates. Divide the downstream data rate by the length of an LRE frame (216 bytes) multiplied by 8 (8 bits per byte).

For example, a link is running LRE-10, which has a downstream data rate of 12.5 Mbps.

((12500000)/(261*8))=5986

If you configure the downstream Reed-Solomon error threshold to 598, an alarm counter increments when the threshold is exceeded.

Examples

This example shows how to configure a threshold for Reed-Solomon errors at 4000 errors per second downstream and 3000 errors per second upstream.


Switch# configure terminal
Switch(config)# interface long 0/1
Switch(config-if)# link monitor threshold rserr downstream 4000 
Switch(config-if)# link monitor threshold rserr upstream 3000
Switch(config-if)#

Related Commands

Command
Description

clear controllers lre link monitor

Deletes LRE link monitor data.

link monitor

Enables the LRE link monitor on a port.

link monitor logging

Enables link monitor event logging per port.

link monitor threshold snr

Sets an signal-to-noise margin for the LRE link monitor.

show controllers lre link monitor errors

Displays Reed-Solomon and Ethenet errors captured by the LRE link monitor.

show controllers lre link monitor parameters

Displays the switch or CPE device operating parameter data.

show controllers lre link monitor statistics

Displays the switch or CPE device statistical data.

show controllers lre status

Displays the Long-Reach Ethernet (LRE) link statistics and profile information on a switch LRE port, including link state, link duration, profile name, and data rates.


link monitor threshold snr

Use the link monitor threshold snr interface configuration command to establish threshold values for signal-to-noise ratio (SNR) errors. Use the no form of the command reset the threshold values to their defaults.

link monitor threshold snr {downstream value | upstream value}

no link monitorthreshold snr {downstream value | upstream value}

Syntax Description

value

The value of the SNR, measured in dB. The valid range is from 0 to 10.


Defaults

The default is 2 dB.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

The default theoretical SNR value added to the threshold value is compared to the value in the LRE chipset.

Examples

This example shows how to configure the SNR threshold as 6 dB downstream and 4 dB upstream.


Switch# configure terminal
Switch(config)# interface long 0/1
Switch(config-if)# link monitor threshold snr downstream 6
Switch(config-if)# link monitor threshold snr upstream 4
Switch(config-if)#

Related Commands

Command
Description

clear controllers lre link monitor

Deletes LRE link monitor data.

link monitor

Enables the LRE link monitor on a port.

link monitor logging

Enables link monitor event logging per port.

link monitor threshold rserr

Sets a Reed-Solomon error threshold for the LRE link monitor.

show controllers lre link monitor errors

Displays Reed-Solomon and Ethernet errors captured by the LRE link monitor.

show controllers lre link monitor parameters

Displays the switch or CPE device operating parameter data.

show controllers lre link monitor statistics

Displays the switch or CPE device statistical data.


local duplex

Use the local duplex interface configuration command to specify the duplex mode of operation for a Long-Reach Ethernet (LRE) port. Use the no form of this command to return the port to its default value.

local duplex {half | full}

no local duplex

Syntax Description

full

Port is in full-duplex mode.

half

Port is in half-duplex mode.


Defaults

The default is half.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ)

This command was introduced.


Usage Guidelines

This command only sets the duplex mode on an LRE link. To set the duplex mode on a customer premises equipment (CPE) Ethernet link, use the cpe duplex command; to set the duplex mode of the Gigabit ports, use the duplex command.

Examples

This example shows how to set LRE port 1 to full duplex:

Switch(config)# interface longrangethernet1/1
Switch(config-if)# local duplex full
Switch(config-if)#

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

Command
Description

cpe duplex

Specifies the duplex mode of CPE Ethernet ports.

cpe speed

Sets the speed of an customer premises equipment (CPE) port

duplex

Specifies the duplex mode of Gigabit Ethernet ports.

local speed

Specifies the speed of LRE ports.

speed

Specifies the speed of LRE Gigabit Ethernet ports.


local speed

Use the local speed interface configuration command to specify the speed of a Long-Reach Ethernet (LRE) port and LRE interface. Use the no form of this command to return to the default value.

local speed {10 | 100}

no local speed

Syntax Description

10

LRE port runs at 10 Mbps.

100

LRE port runs at 100 Mbps.


Defaults

The default is 100 Mbps.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ)

This command was introduced.


Usage Guidelines

This command only sets the speed on an LRE link. To set the speed on a customer premises equipment (CPE) Ethernet link, use the cpe speed command; to set the speed of the Gigabit ports, use the speed command.

Examples

This example shows how to set LRE port 1 to 100 Mbps:

Switch(config)# interface longrangethernet1/1
Switch(config-if)# local speed 100
Switch(config-if)#

You can verify your settings by entering the show running-config privileged EXEC command.

Related Commands

Command
Description

cpe duplex

Specifies the duplex mode of CPE Ethernet ports.

cpe speed

Specifies the speed of CPE Ethernet ports.

duplex

Specifies the duplex mode of Gigabit Ethernet ports.

local duplex

Specifies the duplex mode of operation for LRE ports.

speed

Specifies the speed of Gigabit Ethernet ports.


logging lre

Use the logging lre interface configuration command to specify the mode in which to log Long-Reach Ethernet (LRE) events. Use the no form of the command to turn off logging of events.

logging lre { event | extended | normal}

no logging lre { event | extended | normal}

Syntax Description

event

Logs events only.

extended

Logs events and all possible parameters.

normal

Logs events and some typical parameters.


Defaults

The default is normal.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command is not needed for normal operation of the switch. However, it can be used as a diagnostic tool to analyze activity on the switch.

The maximum number of events that can be logged on a per-port basis is 50. Eventually, the log overwrites itself when full.

Examples

This example shows how to disable the log:


Switch (config)# interface lo0/1
Switch(config-if)# no logging lre
Switch (config-if)#

This example shows how to set logging for events:


Switch (config)# interface lo0/1
Switch(config-if)# logging lre event
Switch (config-if)#

This example shows how to extend event logging to include all possible parameters:


Switch (config)# interface lo0/1
Switch(config-if)# logging lre extended
Switch (config-if)#

This example shows how to add some typical parameters to logging events:


Switch (config)# interface lo0/1
Switch(config-if)# logging lre normal 
Switch (config-if)#

Related Commands

Command
Description

clear controllers lre log

Deletes the history of link, configuration, and timer events for a specific LRE port or for all switch LRE ports.

show controllers lre log

Displays the history of link, configuration, and timer events for a specific LRE port or all switch LRE ports.


lre profile

Use the lre profile global configuration command to assign a Long-Reach Ethernet (LRE) profile to all switch LRE ports.

lre profile profile-name

no lre profile profile-name

Syntax Description

profile-name

Name of the profile. The profile name can be a Cisco-supplied profile or a user-created profile. See the Catalyst 2950 Series Software Configuration Guide for further details on Cisco-supplied profiles.


Defaults

The default is LRE-10.

Command Modes

Global configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Unless you assign a profile, the switch uses the default LRE-10 global profile. This profile allows the upstream and downstream transmission rate on the LRE link to be 12.5 Mbps. Profiles assigned at the port level have priority over profiles that are assigned at the global level.

When assigning profiles to LRE ports, keep these considerations in mind:

The default profile, LRE-10, may not be the best choice for your environment.

When you assign a different profile to a port, the port applies and uses the newly assigned profile.

If the switch is used with equipment directly connected to a public switched telephone network (PSTN) without a public branch exchange (PBX) between the LRE switch and the public telephone lines, Cisco recommends that you use either the LRE-998-15-4-M2 or LRE-997-10-4-M2 profiles globally.

Examples

This example shows how to specify the profile command:


Switch# configure t
Switch(config)# lre profile LRE-8
Switch(config)#

You can verify your settings by entering the show controllers lre profile details privileged EXEC command.

Related Commands

Command
Description

profile (sequence mode)

Adds an LRE profile to a rate selection sequence.

show controllers lre profile names

Displays information about the LRE profiles available on the switch.

show controllers lre profile details

Displays how the profiles are assigned to the switch LRE ports.


lre rate selection sequence

Use the lre rate selection sequence global configuration command to assign the rate selection sequence for the entire switch. Use the no form of the command to delete the assigned sequence.

lre rate selection sequence sequenceName

no lre rate selection sequence sequenceName

Syntax Description

sequenceName

Name of the rate selection sequence being applied.


Command Modes

Global configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command applies a sequence to all ports that have rate selection enabled. The command is rejected if the sequence is not configured with a profile.

When rate selection is enabled, profiles and sequences follow a predefined priority scheme that determines the rate for a port or for the entire switch. In general, sequences have priority over standalone profiles, and port configurations have priority over switch-wide configurations. Specifically, these are the priority levels with rate selection enabled, from highest to lowest:

1. Per-port sequence

2. Global sequence

3. Port profile

4. Global profile

For further details on profiles, sequences, and their priority scheme, see Catalyst 2950 Series Software Configuration Guide.

Examples

This example shows how to specify the sequence named lre-seq-upstream:

Switch(config)# lre rate selection sequence lre-seq-upstream
Switch(config)#

Related Commands

Command
Description

lre rate selection sequence

Assigns a sequence to the entire switch.

lre sequence

Creates user-defined rate selection sequences.

rate selection

Enables rate selection on a specific port.

rate selection sequence

Assigns a rate selection sequence for a specific port.

show controllers lre sequence

Displays the list of sequences.


lre sequence

Use the lre sequence global configuration command to define a new sequence and to enter sequence configuration mode. Use the no form of the command to delete a user-configured sequence.

lre sequence sequence-name

no lre sequence sequence-name

Syntax Description

sequence-name

The name of the sequence being created or modified.


Defaults

No default is defined.

Command Modes

Global configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command creates a new sequence when the sequence name specified in the command does not match any of the existing configured sequences. When the sequence-name specified in the command matches a configured sequence, a new sequence is not created.

The profiles can be edited from the sequence configuration mode. However, the system-defined sequences cannot be edited. If the sequence specified in this command is a system-defined sequence, the command is rejected. An error message appears if the sequence name matches the name of a system-defined sequence. Use the exit command to return to global configuration mode.

Examples

This example shows how to specify the a user-defined sequence called myseq.

Switch# configure t
Switch(config)# lre sequence myseq
Switch(config-seq)#

This example shows how to create a user-defined sequence called corpseq, with two profiles in that sequence.

Switch# configure t
Switch(config)# lre sequence corpseq
Switch(config-seq)# profile lre-15-5
Switch(config-seq)# profile lre-15-3
Switch(config-seq)# exit
Switch(config)#

This example show the error message when trying to edit a system-defined sequence.

Switch(config)# lre sequence lre-seq-complete-reach

Error:Sequence LRE-SEQ-COMPLETE-REACH is a system defined sequence. Cannot edit 
	this sequence
Switch>(config)#

This example shows how to delete a user-defined sequence.

Switch# configure t
Switch(config)# no lre sequence myseq
Switch(config-seq)# exit
Switch(config)#

Related Commands

Command
Description

lre rate selection sequence

Assigns sequences globally.

profile

Adds a profile to a sequence.


lre upgrade default family device-family binary

Use the lre upgrade default family global configuration command to define a map between a Long-Reach Ethernet (LRE) device and an LRE binary.

lre upgrade default family device-family [model model] [revision revision]
binary
LRE binary]

no lre upgrade default family device-family [model model] [revision revision]
binary
LRE binary]

Syntax Description

device-family

Type of device that contains the chipset to be upgraded. Valid values are CISCO575-LRE, CISCO585-LRE, and CISCO2950-LRE.

model

(Optional) Model number of the device family, for example, a model could be CISCO585-LRE.

revision

(Optional) Revision of the target device.

LRE binary

LRE binary file being applied.


Defaults

No default is defined. The system selects the binary file.

Command Modes

Global configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Use the lre upgrade default family device-family binary configuration command to override the default behavior for upgrading LRE firmware. This command is useful when you want to upgrade all CPE devices or local controllers of a given family to an LRE binary version.


Note The name of the LRE binary must by entered as it appears on Flash memory. Use the show lre upgrade binaries command to determine the Flash filename of an LRE binary.


Examples

This example configures all CISCO585-LRE CPE devices to upgrade with the LRE binary file CISCO-585-LRE_vdslsngl_51.00.00:

Switch(config)# lre upgrade default family CISCO585-LRE binary 
	CISCO585-LRE_vdslsngl_51.00.00.bin
Switch(config)#


Related Commands

Command
Description

controller LongReachEthernet

Allows you to enter controller submode.

show lre upgrade binaries

Displays the LRE binaries present on the system Flash memory.

show lre upgrade version

Displays the version of binaries on local and remote ports in the switch.

upgrade binary

Configures upgrades on either end of an LRE link.

upgrade preserve

Prevents an upgrade of the local CPE controller and all remote CPE devices connected to it.


mac access-group

Use the mac access-group interface configuration command to apply a named extended MAC access control list (ACL) to an interface. Use the no form of this command to remove a MAC ACL from an interface.

mac access-group name in

no mac access-group name in

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

name

Name of the MAC extended ACL.


Defaults

No MAC ACL is applied to the interface.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You can apply MAC ACLs only to ingress interfaces. If an IP access group is already defined for an interface, you cannot apply this command to the interface.

After receiving the packet, the switch checks the match conditions in the ACL. If the conditions are matched, the switch forwards the packet.

If the specified ACL does not exist, the switch forwards all packets.


Note For more information about configuring MAC extended ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to apply a MAC extended ACL named macacl2 to an interface:

Switch(config)# interface fastethernet0/1
Switch(config-if)# mac access-group macacl2 in

You can verify your settings by entering the show mac access-group privileged EXEC command.

Related Commands

Command
Description

{deny (MAC access-list configuration) | permit (MAC access-list configuration)}

Configures a MAC ACL.

show access-lists

Displays the ACLs configured on the switch.

show mac access-group

Displays the MAC ACLs configured on the switch.


mac access-list extended

Use the mac access-list extended global configuration command to create an access control list (ACL) based on MAC addresses. Using this command changes the mode to extended MAC access-list configuration mode. Use the no form of this command to return to the default setting.

mac access-list extended name

no mac access-list extended name

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

name

Assign a name to the MAC extended ACL.


Defaults

No MAC ACLs are created.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

MAC-named extended ACLs are used with the mac access-group interface configuration command and class maps.


Note For more information about configuring MAC extended ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to enter extended MAC access-list configuration mode and to create a MAC extended ACL named mac1:

Switch(config)# mac access-list extended mac1
Switch(config-ext-macl)#

This example shows how to delete the MAC extended ACL named mac1:

Switch(config)# no mac access-list extended mac1

You can verify your settings by entering the show access-lists privileged EXEC command.

Related Commands

Command
Description

class-map

Creates a class map to be used for matching packets to the class whose name you specify and to enter class-map configuration mode.

{deny (MAC access-list configuration) | permit (MAC access-list configuration)}

Configures a MAC ACL.

mac access-group

Applies a MAC ACL to an interface.

show access-lists

Displays the ACLs configured on the switch.


mac address-table aging-time

Use the mac address-table aging-time global configuration command to set the length of time that a dynamic entry remains in the MAC address table after the entry is used or updated. Use the no form of this command to return to the default setting. The aging time applies to all VLANs.

mac address-table aging-time [0 | 10-1000000]

no mac address-table aging-time [0 | 10-1000000]


Note Beginning with Release 12.1(11)EA1, the mac address-table aging-time command replaces the mac-address-table aging-time command (with the hyphen). The mac-address-table aging-time command (with the hyphen) will become obsolete in a future release.


Syntax Description

0

This value disables aging. Static address entries are never aged or removed from the table.

10-100000

Aging time in seconds. The range is 10 to 1000000 seconds.


Defaults

The default is 300 seconds.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.

12.1(6)EA2

The aging-time values were modified.

12.1(11)EA1

The mac-address-table aging-time command was replaced by the mac address-table aging-time command.


Usage Guidelines

If hosts do not send continuously, increase the aging time to record the dynamic entries for a longer time. This reduces the possibility of flooding when the hosts send again.

Examples

This example shows how to set the aging time to 200 seconds:

Switch(config)# mac address-table aging-time 200

This example shows how to disable aging in VLAN 1.

Switch(config)# mac address-table aging-time 0

This example shows how to set aging time to 450 seconds for all VLANs for which the user did not specify aging time.

Switch(config)# mac address-table aging-time 450

You can verify your settings by entering the show mac address-table privileged EXEC command.

Related Commands

Command
Description

clear mac address-table

Deletes dynamic entries from the MAC address table.

show mac address-table

Displays the MAC address table.

show mac address-table aging-time

Displays the MAC address table aging time for all VLANs or the specified VLAN.


mac address-table notification

Use the mac address-table notification global configuration command to enable the MAC notification feature and configure the notification-trap interval or history table. Use the no form of this command to disable this feature.

mac address-table notification [history-size size | interval interval]

no mac address-table notification [history-size size | interval interval]


Note Beginning with Release 12.1(11)EA1, the mac address-table notification command replaces the mac-address-table notification command (with the hyphen). The mac-address-table notification command (with the hyphen) will become obsolete in a future release.


Syntax Description

history-size size

(Optional) Configures the maximum number of entries in the MAC notification history table; valid values are 0 to 500.

interval interval

(Optional) Configures the notification-trap interval in seconds; valid values are from 0 to 2147483647. The switch sends the notification traps when this amount of time has elapsed.


Defaults

The MAC notification feature is disabled.

The default trap-interval value is 1 second.

The default number of entries in the history table is 1.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.

12.1(11)EA1

The mac-address-table notification command was replaced by the mac address-table notification command.


Usage Guidelines

The MAC address notification feature sends Simple Network Management Protocol (SNMP) traps to the network management system (NMS) whenever a MAC address is added or deleted from the forwarding tables. MAC notifications are generated only for dynamic and secure MAC addresses. Events are not generated for self addresses, multicast addresses, or other static addresses.

When you configure the history-size option, the existing MAC address history table is deleted, and a new table is created.

You enable the MAC address notification feature by using the mac address-table notification command. You must also enable MAC address notification traps on an interface by using the snmp trap mac-notification interface configuration command, and configure the switch to send MAC address traps to the NMS by using the snmp-server enable traps mac-notification global configuration command.

Examples

This example shows how to enable the MAC notification feature:

Switch(config)# mac address-table notification

This example shows how to set the notification-trap interval to 60 seconds:

Switch(config)# mac address-table notification interval 60

This example shows how to set the number of entries in the history table to 32:

Switch(config)# mac address-table notification history-size 32

You can verify your settings by entering the show mac address-table notification privileged EXEC command.

Related Commands

Command
Description

clear mac address-table notification

Clears the MAC address notification global counters.

show mac address-table notification

Displays the MAC address notification settings for all interfaces or the specified interface.

snmp-server enable traps

Sends the SNMP MAC notification traps when the mac-notification keyword is appended.

snmp trap mac-notification

Enables the SNMP MAC notification trap on a specific interface.


mac address-table static

Use the mac address-table static global configuration command to add static addresses to the MAC address table. Use the no form of this command to remove static entries from the MAC address table.

mac address-table static mac-addr vlan vlan-id interface interface-id

no mac address-table static mac-addr vlan vlan-id interface interface-id


Note Beginning with Release 12.1(11)EA1, the mac address-table static command replaces the mac-address-table static command (with the hyphen). The mac-address-table static command (with the hyphen) will become obsolete in a future release.


Syntax Description

mac-addr

Destination MAC address (unicast or multicast) to add to the address table. Packets with this destination address received in the specified VLAN are forwarded to the specified interface.

vlan vlan-id

Specify the VLAN for which the packet with the specified MAC address is received. Valid VLAN IDs are 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1005 when the standard software image (SI) is installed. Do not enter leading zeros.

interface interface-id

Interface to which the received packet is forwarded. Valid interfaces include physical ports and port channels.


Defaults

None configured.

Command Modes

Global configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.

12.1(6)EA2

The interface keyword and parameters were changed.

12.1(11)EA1

The mac-address-table static command was replaced by the mac address-table static command.


Examples

This example shows how to add the static address 0004.5600.67ab to the MAC address table:

Switch(config)# mac address-table static 0004.5600.67ab vlan 1 interface fastethernet0/2

This example shows how to add the static address c2f3.220a.12f4 to the MAC address table. When a packet is received in VLAN 4 with this MAC address as its destination, the packet is forwarded to the specified interface:

Switch(config)# mac address-table static c2f3.220a.12f4 vlan 4 interface 
gigabitethernet0/1

You can verify your settings by entering the show mac address-table privileged EXEC command.

Related Commands

Command
Description

clear mac address-table

Deletes entries from the MAC address table.

mac address-table aging-time

Sets the length of time that a dynamic entry remains in the MAC address table after the entry is used or updated.

show mac address-table

Displays the MAC address table.

show mac address-table static

Displays static MAC address table entries only.


margin

Use the margin interface configuration command to specify the margin value used to determine link quality during Long-Reach Ethernet (LRE) rate selection. Use the no form of this command to restore the default value.

margin {downstream value | upstream value}

no margin {downstream value | upstream value}

Syntax Description

downstream value

Value at the remote end of the link. Valid entries are from 0 to 10 dB.

upstream value

Value at the local end of the link. Valid entries are from 0 to 10 dB.


Defaults

The default is 0 dB.

Command Modes

Interface configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

When rate selection is running, the signal-to-noise ratio (SNR) shows the link quality. The switch does not provide any internal mechanism to assure link quality. There can be different requirements for link quality, depending on the required bit-error rate and the noise level of the environment. A noisier environment would require a higher SNR in order to provide a stable link. A lower bit-error rate would require a higher SNR. Typically a 6-dB margin provides an error rate of 10-21 bits.

To provide link stability, you should add a margin to the required SNR. You can configure your margins to an amount that is appropriate for the noise level of your environment. Increasing the margin requirement can cause the system to choose a lower profile, which would in turn translate to a lower rate but with a longer reach.

The switch does not guarantee any margins after a link is activated. Margins are only guaranteed when the link is established. When a link is activated, if the SNR requirements do not match the configured margin level, the link is not established.

Downstream means the remote end of the link and upstream the local end. The link has to satisfy both the local and remote margin requirements. If either one is not met, the link is advertised as down. This command has no significance if rate selection is not running on this interface.


Note Setting a margin requirement might cause the system to choose another profile, which might translate to a lower rate but a longer reach.


For a full discussion of link stability and margins, refer to the Catalyst 2950 Series Software  Configuration Guide.

Examples

This example shows how to specify a margin of 2 dB for both upstream and downstream. If the SNR is 2 dB above the theoretical minimum for the chosen profile when the link is established, the link is classified as down and the next profile in the sequence is attempted.

Switch(config-if)# margin upstream 2 downstream 2
Switch(config-if)#

This example shows show to specify a margin of 1 dB for downstream:

Switch(config-if)# margin downstream 1
Switch(config-if)#

Related Commands

Command
Description

lre rate selection sequence

Assigns a rate selection sequence for the entire switch.

rate selection

Enables rate selection on a specific port.

rate selection sequence

Assigns a rate selection sequence for a specific port.


match

Use the match class-map configuration command to define the match criteria to classify traffic. Use the no form of this command to remove the match criteria.

match {access-group acl-index | access-group name acl-name | ip dscp dscp-list}

no match {access-group acl-index | access-group name acl-name | ip dscp}

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

access-group acl-index

Number of an IP standard or extended access control list (ACL).

For an IP standard ACL, the ACL index range is 1 to 99 and 1300 to 1999. For an IP extended ACL, the ACL index range is 100 to 199 and 2000 to 2699.

access-group name acl-name

Name of an IP standard or extended ACL or name of an extended MAC ACL.

Note The ACL name must begin with an alphabetic character to prevent ambiguity with numbered ACLs. A name also cannot contain a space or quotation mark.

ip dscp dscp-list

List of up to eight IP Differentiated Services Code Point (DSCP) values for each match statement to match against incoming packets. Separate each value with a space. The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56.


Defaults

No match criteria are defined.

Command Modes

Class-map configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Use the match command to specify which fields in the incoming packets are examined to classify the packets. Only IP access groups, MAC access groups, and classification based on DSCP values are supported.

Only one match command per class map is supported.


Note For more information about configuring ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to classify traffic on an interface by using the access group named acl2:

Switch(config)# class-map class2
Switch(config-cmap)# match access-group name acl2
Switch(config-cmap)# exit

You can verify your settings by entering the show class-map privileged EXEC command.

Related Commands

Command
Description

class

Defines a traffic classification for a policy to act on using the class-map name or access group.

class-map

Creates a class map to be used for matching packets to the class whose name you specify.

ip access-group

Controls access to an interface.

mac access-group

Applies a named extended MAC ACL to an interface.

show class-map

Displays quality of service (QoS) class maps.

show policy-map

Displays QoS policy maps.


media-type

Use the media-type interface configuration command to enable or disable fiber-optic or copper connections on a Long-Reach Ethernet (LRE) switch. It also allows you to manually set the port to select a small form-factor pluggable (SFP) connector or an RJ-45 connector. Use the no form of this command to return to the default setting of SFP-preferred.

media-type {auto-select | sfp | rj45}

no media-type {auto-select | sfp | rj45}

Syntax Description

auto-select

First media-type detected makes the link.

sfp

SFP fiber-optic connection makes the link even when a link is already established with copper.

rj45

RJ-45 copper connection makes the link even when a link is already established with fiber-optic.


Defaults

The default is SFP-preferred.

Command Modes

Interface Configuration

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

If an LRE switch detects an SFP connector inserted into the switch, whether or not fiber-optic is connected to that connector, it attempts to link by using SFP as the media-type. This preference of fiber-optic over copper connection is called SFP-preferred. To physically connect both fiber-optic and copper and to override the SFP preferred setting, use the auto-select parameter or force the setting to RJ45 or SFP.

You can check your settings using the show interfaces command with the media or media interface-id parameters.

Examples

This example of the media-type command forces the connection to a copper RJ-45 connection:

Switch# configure t
Switch(config)# interface gi0/1
Switch(config-if)# media-type rj45
Switch(config-if)

Related Commands

Command
Description

show interfaces

Shows the status or resolution of the link.


mls qos cos

Use the mls qos cos interface configuration command to define the default class of service (CoS) value of a port or to assign the default CoS to all incoming packets on the port. Use the no form of this command to return to the default setting.

mls qos cos {default-cos | override}

no mls qos cos {default-cos | override}

Syntax Description

default-cos

Assign a default CoS value to a port. If the port is CoS trusted and packets are untagged, the default CoS value becomes a CoS value used to select one output queue to index into the CoS-to-Differentiated Services Code Point (DSCP) map. The CoS range is 0 to 7.

override

Override the CoS of the incoming packets, and apply the default CoS value on the port to all incoming packets.


Defaults

The default CoS value for a port is 0.

CoS override is disabled.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You can use the default value to assign CoS and DSCP values to all packets entering a port if the port has been configured by using the override keyword.

Use the override keyword when all incoming packets on certain ports deserve higher or lower priority than packets entering from other ports. Even if a port was previously set to trust DSCP or CoS, this command overrides that trust state, and all the incoming CoS values are assigned the default CoS value configured with the mls qos cos command. If an incoming packet is tagged, the CoS value of the packet is modified with the default CoS of the port at the ingress port.

Examples

This example shows how to configure the default port CoS to 4:

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# mls qos trust cos
Switch(config-if)# mls qos cos 4

This example shows how to assign all the packets entering a port to the default port CoS value of 4:

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# mls qos cos 4
Switch(config-if)# mls qos cos override

You can verify your settings by entering the show mls qos interface privileged EXEC command.

Related Commands

Command
Description

mls qos map

Defines the CoS-to-DSCP map or the DSCP-to-CoS map.

mls qos trust

Configures the port trust state.

show mls qos interface

Displays quality of service (QoS) information.


mls qos map

Use the mls qos map global configuration command to define the class of service (CoS)-to-Differentiated Services Code Point (DSCP) map or DSCP-to-CoS map. Use the no form of this command to return to the default map.

mls qos map {cos-dscp dscp1...dscp8 | dscp-cos dscp-list to cos}

no mls qos map {cos-dscp | dscp-cos}

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

cos-dscp dscp1...dscp8

Define the CoS-to-DSCP map.

For dscp1...dscp8, enter eight DSCP values that correspond to CoS values
0 to 7. Separate each DSCP value with a space.

The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56.

dscp-cos dscp-list to cos

Define the DSCP-to-CoS map.

For dscp-list, enter up to 13 DSCP values separated by spaces. Then enter the to keyword. The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56.

For cos, enter the CoS value to which the DSCP values correspond. The CoS range is 0 to 7.


Defaults

Table 2-4 shows the default CoS-to-DSCP map:

Table 2-4 Default CoS-to-DSCP Map

CoS Value

0

1

2

3

4

5

6

7

DSCP Value

0

8

16

24

32

40

48

56


Table 2-5 shows the default DSCP-to-CoS map:

Table 2-5 Default DSCP-to-CoS Map

DSCP Values

0

8, 10

16, 18

24, 26

32, 34

40, 46

48

56

CoS Value

0

1

2

3

4

5

6

7


Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

All the maps are globally defined. You apply all maps to all ports.

If you enter the mls qos trust cos command, the default CoS-to-DSCP map is applied.

If you enter the mls qos trust dscp command, the default DSCP-to-CoS map is applied.

After a default map is applied, you can define the CoS-to-DSCP or DSCP-to-CoS map by entering consecutive mls qos map commands.

The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56. If the mls qos trust dscp command is entered and a packet with an untrusted DSCP value is at an ingress port, the packet CoS value is set to 0.


Note The switches do not support the dscp-mutation, dscp-switch-priority, ip-prec-dscp, and policed-dscp options.


Examples

This example shows how to define the DSCP-to-CoS map. DSCP values 16, 18, 24, and 26 are mapped to CoS 1. DSCP values 0, 8, and 10 are mapped to CoS 0.

Switch# configure terminal
Switch(config)# mls qos map dscp-cos 16 18 24 26 to 1
Switch(config)# mls qos map dscp-cos 0 8 10 to 0

This example shows how to define the CoS-to-DSCP map. CoS values 0 to 7 are mapped to DSCP values 8, 8, 8, 8, 24, 32, 56, and 56.

Switch# configure terminal
Switch(config)# mls qos map cos-dscp 8 8 8 8 24 32 56 56

You can verify your settings by entering the show mls qos maps privileged EXEC command.

Related Commands

Command
Description

mls qos cos

Defines the default CoS value of a port or assigns the default CoS to all incoming packets on the port.

mls qos trust

Configures the port trust state.

show mls qos maps

Displays quality of service (QoS) mapping information.


mls qos trust

Use the mls qos trust interface configuration command to configure the port trust state. Ingress traffic can be trusted, and classification is performed by examining the class of service (CoS) or the Differentiated Services Code Point (DSCP) value. Use the no form of this command to return a port to its untrusted state.

mls qos trust [cos [pass-through dscp] | device cisco-phone | dscp]

no mls qos trust [cos [pass-through dscp] | device cisco-phone | dscp]

Syntax Description

cos

(Optional) Classify ingress packets with packet CoS values. For untagged packets, the port default CoS value is used.

cos pass-through dscp

(Optional) Configure the interface to classify ingress packets by trusting the CoS value and to send packets without modifying the DSCP value (pass-through mode).

device cisco-phone

(Optional) Classify ingress packets by trusting the value sent from the Cisco IP Phone (trusted boundary).

dscp

(Optional) Classify ingress packets with packet DSCP values (most significant 6 bits of the 8-bit service-type field). For non-IP packets, the packet CoS value is set to 0. This keyword is available only if your switch is running the enhanced software image (EI).


Defaults

The port is not trusted.

Pass-through mode is disabled.

Trusted boundary is disabled.

If no keyword is specified and the switch is running the EI, the default is dscp.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.

12.1(11)EA1

The device cisco-phone and pass-through dscp keywords were added.


Usage Guidelines

Packets entering a quality of service (QoS) domain are classified at the edge of the QoS domain. When the packets are classified at the edge, the switch port within the QoS domain can be configured to one of the trusted states because there is no need to classify the packets at every switch within the domain. Use this command to specify whether the port is trusted and which fields of the packet to use to classify traffic.

When a port is configured with trust DSCP and the incoming packet is a tagged non-IP packet, the CoS value for the packet is set to 0, and the DSCP-to-CoS map is not applied. For an untagged non-IP packet, the default port CoS value is used.

If DSCP is trusted, the DSCP field of the IP packet is not modified. However, it is still possible that the CoS value of the packet is modified (according to the DSCP-to-CoS map).

If CoS is trusted, the CoS of the packet is not modified, but DSCP can be modified (according to the CoS-to-DSCP map) if it is an IP packet.

To return a port to the untrusted state, use the no mls qos trust interface configuration command.

The trusted boundary feature prevents security problems if users disconnect their PCs from networked Cisco IP Phones and connect them into the switch port to take advantage of trusted CoS settings. You must globally enable the Cisco Discovery Protocol (CDP) on both the switch and on the interface connected to the IP phone. If the phone is not detected, trusted boundary disables the trust setting on the switch port and prevents misuse of a high-priority queue.

If trusted boundary is enabled and the no mls qos trust command is entered, the port returns to the untrusted state and cannot be configured to trust if it is connected to a Cisco IP Phone.

To disable trusted boundary, use the no mls qos trust device interface configuration command.

In software releases earlier than Release 12.1(11)EA1, the switch is in pass-through mode. It uses the CoS value of incoming packets without modifying the DSCP value and sends the packets from one of the four egress queues. You cannot enable or disable pass-through mode if your switch is running a software release earlier than Release 12.1(11)EA1.

In Release 12.1(11)EA1 or later, pass-through mode is disabled by default. The switch assigns a CoS value of 0 to all incoming packets without modifying the packets. It offers best-effort service to each packet regardless of the packet contents or size and sends it from a single egress queue.

You can enable pass-through mode on a switch running Release 12.1(11)EA1 or later by using the mls qos trust cos pass-through dscp interface configuration command. To disable pass-through mode, use the no mls qos trust cos pass-through interface configuration command.


Note In software releases earlier than Release 12.1(11)EA1, the mls qos trust command is available only when the switch is running the EI.


Examples

This example shows how to configure a port to be a DSCP-trusted port:

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# mls qos trust dscp

Note The mls qos trust dscp command is available only when the switch is running the EI.


This example shows how to specify that the Cisco IP Phone is a trusted device:

Switch(config)# interface fastethernet0/1
Switch(config-if)# mls qos trust device cisco-phone

This example shows how to configure the interface to trust the CoS of incoming packets and to send them without modifying the DSCP field:

Switch(config)# interface fastethernet0/1
Switch(config-if)# mls qos trust cos pass-through dscp

You can verify your settings by entering the show mls qos interface privileged EXEC command.

Related Commands

Command
Description

mls qos cos

Defines the default CoS value of a port or assigns the default CoS to all incoming packets on the port.

mls qos map

Defines the CoS-to-DSCP map or the DSCP-to-CoS map.

show mls qos interface

Displays QoS information.


monitor session

Use the monitor session global configuration command to start a new Switch Port Analyzer (SPAN) or Remote SPAN (RSPAN) session. Use the no form of this command to remove the SPAN or the RSPAN session or to remove source or destination interfaces from the SPAN or RSPAN session.

monitor session session_number {destination {interface interface-id [encapsulation {dot1q}] | remote vlan vlan-id reflector-port interface-id} | source {interface interface-id [, | -] [both | rx | tx ] | remote vlan vlan-id}}

no monitor session session_number {destination {interface interface-id [encapsulation {dot1q}] | remote vlan vlan-id reflector-port interface-id} | source {interface interface-id [, | -] [both | rx | tx ] | remote vlan vlan-id}}

no monitor session {session_number | all | local | remote}

To use the RSPAN feature, you must have the enhanced software image (EI) installed on your switch.

Syntax Description

session_number

Specify the session number identified with the SPAN or RSPAN session.

destination interface interface-id

Specify the destination interface for a local SPAN session. Valid interfaces are physical ports.

encapsulation

(Optional) Specify the encapsulation header for outgoing packets through a destination port. If encapsulation type is not specified, packets are sent in native form. To reconfigure a destination port in native form, enter the command without the encapsulation keyword.

dot1q

Specify the encapsulation type as 802.1Q.

destination remote vlan vlan-id

Specify the destination remote VLAN for an RSPAN source session.

reflector-port interface-id

Specify the reflector port used for a source RSPAN session.

source interface interface-id

Specify the SPAN source interface type, slot, and port number. Valid interfaces include physical ports and port channels.

,

Note (Optional) Specify a series of interfaces, or separate a range of interfaces from a previous range. Enter a space after the comma.

-

Note (Optional) Specify a range of interfaces. Enter a space before and after the hyphen.

both, rx, tx

(Optional) Specify the traffic direction for each source.

source remote vlan vlan-id

Specify the source RSPAN VLAN for an RSPAN destination session.

all, local, remote

Specify all, local, or remote to clear a SPAN or RSPAN session.


Defaults

On a source interface, the default is to monitor both received and transmitted traffic.

If encapsulation type is not specified on a destination port, packets are sent in native form with no encapsulation.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA1

This command was introduced.

12.1(11)EA1

These RSPAN keywords were added: encapsulation, destination remote vlan reflector-port, source remote vlan, all, local, remote.


Usage Guidelines

Traffic that enters or leaves source ports can be monitored by using SPAN or RSPAN. Traffic routed to source ports cannot be monitored.

You can configure (and store in NVRAM) one local SPAN session or multiple RSPAN sessions on a switch. The number of active sessions and combinations are subject to these restrictions:

SPAN or RSPAN source (rx, tx, both): one active session limit. (SPAN and RSPAN are mutually exclusive on a source switch).

RSPAN source sessions have one destination per session with an RSPAN VLAN associated for that session.

Each RSPAN destination session has one or more destination interfaces for each RSPAN VLAN that it supports.

RSPAN destination sessions are limited to two, or one if a local SPAN or a source RSPAN session is configured on the same switch.

You can monitor traffic on a single port or on a series or range of ports. You select a series or range of interfaces by using the [, | -] options.

If you specify a series of interfaces, you must enter a space after the comma. If you specify a range of interfaces, you must enter a space before and after the hyphen (-).

EtherChannel ports cannot be configured as SPAN or RSPAN destination or reflector ports. A physical port that is a member of an EtherChannel group can be used as a source or destination port. It does not participate in the EtherChannel group while it is configured for SPAN or RSPAN.

A port used as a reflector port cannot be a SPAN or RSPAN source or destination port, nor can a port be a reflector port for more than one session at a time.

A port used as a destination port cannot be a SPAN or RSPAN source or reflector port, nor can a port be a destination port for more than one session at a time.

You can enable 802.1X on a port that is a SPAN or RSPAN destination port; however, 802.1X is disabled until the port is removed as a SPAN destination. (If 802.1X is not available on the port, the switch will return an error message.) You can enable 802.1X on a SPAN or RSPAN source port.

Examples

This example shows how to create SPAN session 1 to monitor both sent and received traffic on source interface 0/1 on destination interface 0/8:

Switch(config)# monitor session 1 source interface longreachethernet 0/1 both
Switch(config)# monitor session 1 destination interface longreachethernet 0/8

This example shows how to delete a destination port from an existing SPAN session:

Switch(config)# no monitor session 2 destination fastEthernet0/4

This example shows how to configure RSPAN session 1 to monitor multiple source interfaces and to configure the destination RSPAN VLAN and the reflector-port.

Switch(config)# monitor session 1 source interface fastEthernet0/10 tx
Switch(config)# monitor session 1 source interface fastEthernet0/2 rx
Switch(config)# monitor session 1 source interface port-channel 102 rx
Switch(config)# monitor session 1 destination remote vlan 901 reflector-port 
fastEthernet 0/1
Switch(config)# end

You can verify your settings by entering the show monitor privileged EXEC command.

Related Commands

Command
Description

remote-span

Configures an RSPAN VLAN in vlan configuration mode.

show mvr

Displays SPAN and RSPAN session information.


mvr

Use the mvr global configuration command without keywords to enable the multicast VLAN registration (MVR) feature on the switch. Use the no form of this command to disable MVR and its options. Use the command with keywords to set the MVR mode for a switch, to configure the MVR IP multicast address, to set the maximum time to wait for a query reply before removing a port from group membership, and to specify the MVR multicast VLAN. Use the no form of the command to return the switch to the default settings.

mvr [group ip-address [count] | mode {compatible | dynamic} | querytime value | vlan vlan-id]

no mvr [group ip-address | mode {compatible | dynamic} | querytime value | vlan vlan-id]

Syntax Description

group ip-address

(Optional) Statically configure an MVR group IP multicast address on the switch.

Use the no form of this command to remove a statically configured IP multicast address or contiguous addresses or, when no IP address is entered, to remove all statically configured MVR IP multicast addresses.

count

(Optional) Configure multiple contiguous MVR group addresses. The range is from 1 to 256. The default is 1.

mode

(Optional) Specify the MVR mode of operation.

The default is compatible mode.

compatible

Set MVR mode to provide compatibility with Catalyst 2900 XL and 3500 XL switches. This mode does not allow dynamic membership joins on source ports.

dynamic

Set MVR mode to allow dynamic MVR membership on source ports.

querytime value

(Optional) Set the maximum time to wait for Internet Group Management Protocol (IGMP) report memberships on a receiver port. This time applies only to receiver-port leave processing. When an IGMP query is sent from a receiver port, the switch waits for the default or configured MVR query time for an IGMP group membership report before removing the port from multicast group membership.

The value is the response time in units of tenths of a second. The default is 5 tenths or one-half second. The range is 1 to 100 tenths of a second.

Use the no form of the command to return to the default setting.

vlan vlan-id

(Optional) Specify the VLAN on which MVR multicast data is expected to be received. This is also the VLAN to which all the source ports belong. The default is VLAN 1. Valid VLAN IDs are 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1001 when the standard software image (SI) is installed. Do not enter leading zeros.


Defaults

MVR is disabled by default.

The default MVR mode is compatible mode.

No IP multicast addresses are configured on the switch by default.

The default group IP address count is 0.

The default query response time is 5 tenths of or one-half second.

The default multicast VLAN for MVR is VLAN 1.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

A maximum of 256 MVR multicast groups can be configured on a switch.

Use the mvr group command to statically configure all the IP multicast addresses that will take part in MVR. Any multicast data sent to a configured multicast address is sent to all the source ports on the switch and to all receiver ports registered to receive data on that IP multicast address.


Note The mvr group command prevents adding IP multicast addresses that cause address aliasing between MVR multicast groups or with the reserved IP multicast addresses (in the range 224.0.0.xx). Each IP multicast address translates to a multicast 48-bit MAC address. If the IP address being configured translates (aliases) to the same 48-bit MAC address as a previously configured IP multicast address or the reserved MAC multicast addresses, the command fails.


The mvr querytime parameter applies only to receiver ports.

The mvr group and mvr vlan commands only apply to ports configured as receiver ports.

If the switch MVR is interoperating with Catalyst 2900 XL or Catalyst 3500 XL switches, set the multicast mode to compatible.

When in compatible mode, MVR does not support IGMP dynamic joins on MVR source ports.

Examples

This example shows how to enable MVR:

Switch(config)# mvr

This example shows how to disable MVR:

Switch(config)# no mvr

This example shows how to configure 228.1.23.4 as an IP multicast address:

Switch(config)# mvr group 228.1.23.4

This command fails because of address aliasing:

Switch(config)# mvr group 230.1.23.4

Cannot add this IP address - aliases with previously configured IP address 228.1.23.4. 

This example shows how to configure ten contiguous IP multicast groups with multicast addresses from 228.1.23.1 to 228.1.23.10:

Switch(config)# mvr group 228.1.23.1 10

This example shows how to delete the previously configured ten IP multicast addresses:

Switch(config)# no mvr group 228.1.23.1 10

This example shows how to delete all previously configured IP multicast addresses:

Switch(config)# no mvr group

This example shows how to set the maximum query response time as 1 second (10 tenths):

Switch(config)# mvr querytime 10

This example shows how to return the maximum query response time to the default setting of one-half second:

Switch(config)# no mvr querytime

This example shows how to set VLAN 2 as the multicast VLAN:

Switch(config)# mvr vlan 2 

Use the show mvr members privileged EXEC command to display the IP multicast group addresses configured on the switch.

You can verify your settings by entering the show mvr privileged EXEC command.

Related Commands

Command
Description

mvr immediate

Enables the Immediate-Leave feature on an interface.

mvr type

Configures a port as a receiver or source port.

mvr vlan group

Configures a receiver port as a member of an MVR group.

show mvr

Displays MVR global parameters or port parameters.

show mvr interface

Displays the configured MVR interfaces with their type, status, and Immediate-Leave configuration.

show mvr interface interface-id member

Displays all MVR groups of which the interface is a member.

show mvr members

Displays all ports that are members of an MVR multicast group; if the group has no members, its status is shown as Inactive.


mvr immediate

Use the mvr immediate interface configuration command to enable the Immediate-Leave feature on an interface. Use the no form of this command to disable the feature on the interface.

mvr immediate

no mvr immediate

Syntax Description

This command has no keywords or arguments.

Defaults

The Immediate-Leave feature is disabled.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The Immediate-Leave feature applies only to receiver ports. When the Immediate-Leave feature is enabled, a receiver port leaves a multicast group more quickly. When the switch receives an Internet Group Management Protocol (IGMP) leave message from a group on a receiver port, it sends an IGMP query on that port and waits for IGMP group membership reports. If no reports are received in a configured time period, the receiver port is removed from multicast group membership. With the Immediate-Leave feature, an IGMP query is not sent from the receiver port on which the IGMP leave was received. As soon as the leave message is received, the receiver port is removed from multicast group membership, thus speeding up leave latency.

The Immediate-Leave feature should only be enabled on receiver ports to which a single receiver device is connected.

Examples

This example shows how to enable the Immediate-Leave feature on a port:

Switch(config-if)# mvr immediate

This example shows how to disable the Immediate-Leave feature on a port:

Switch(config-if)# no mvr immediate

You can verify your settings by entering the show mvr privileged EXEC command.

Related Commands

Command
Description

mvr

Enables multicast VLAN registration (MVR).

mvr type

Configures a port as a receiver or source port.

mvr vlan group

Configures a receiver port as a member of an MVR group.

show mvr

Displays MVR global parameters or port parameters.


mvr type

Use the mvr type interface configuration command to configure a port as a multicast VLAN registration (MVR) receiver or source port. Use the no form of the command to return the port to the default settings.

mvr type {receiver | source}

no mvr type {receiver | source}

Syntax Description

receiver

Port that receives multicast data and cannot send multicast data to multicast groups.

source

Port that can send and receive multicast data to multicast groups.


Defaults

By default, a port is configured as neither receiver nor source.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Configure a port as a source port if that port should be able to both send and receive multicast data bound for the configured multicast groups. Multicast data is received on all ports configured as source ports.

Configure a port as a receiver port if that port should only be able to receive multicast data and should not be able to send multicast data to the configured multicast groups. None of the receiver ports receives multicast data unless it sends an Internet Group Management Protocol (IGMP) group join message for a multicast group.

A receiver port configured as a static member of a multicast group remains a member until statically removed from membership.


Note All receiver ports must not be trunk ports and must not belong to the MVR source VLAN.


A port that is not taking part in MVR should not be configured as an MVR receiver port or source port. This port is a normal switch port and is able to send and receive multicast data with normal switch behavior.

Examples

This example shows how to configure a port as an MVR receiver port:

Switch(config)# interface fastethernet0/1
Switch(config-if)# mvr type receiver

This example shows how to configure a port as an MVR source port:

Switch(config)# interface fastethernet0/3
Switch(config-if)# mvr type source

This example shows how to return a port to the default setting:

Switch(config)# interface fastethernet0/5
Switch(config-if)# no mvr type receiver

You can verify your settings by entering the show mvr privileged EXEC command.

Related Commands

Command
Description

mvr

Enables MVR.

mvr immediate

Enables the Immediate-Leave feature on an interface.

mvr vlan group

Configures a receiver port as a member of an MVR group.

show mvr

Displays MVR global parameters or port parameters.


mvr vlan group

Use the mvr vlan group interface configuration command to statically configure a receiver port as a member of a multicast VLAN registration (MVR) group in a particular VLAN. Use the no form of the command to remove the port from the MVR group.

mvr vlan vlan-id group ip-address

no mvr vlan vlan-id group ip-address

Syntax Description

vlan vlan-id

Specify the VLAN ID to which the receiver port belongs. Valid IDs are from 1 to 4094 when the enhanced software image (EI) is installed and 1 to 1005 when the standard software image (SI ) is installed. Do not enter leading zeros.

group ip-address

Specify the MVR group address for which the interface is statically configured to be a member.


Defaults

By default, a port is configured as neither receiver nor source.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The receiver port belongs to a multicast VLAN.

The group address is configured as a MVR group address.

Examples

This example shows how to configure a static MVR group entry on port 0/1 in VLAN 10:

Switch(config)# interface fastethernet0/1
Switch(config-if)# mvr vlan 10 group 225.1.1.1

This example shows how to remove an entry on port 0/3 in VLAN 10:

Switch(config)# interface fastethernet0/3
Switch(config-if)# no mvr 10 group 255.1.1.2

You can verify your settings by entering the show mvr privileged EXEC command.

Related Commands

Command
Description

mvr

Enables MVR.

mvr immediate

Enables the Immediate-Leave feature on an interface.

mvr type

Configures a port as a receiver or source port.

show mvr

Displays MVR global parameters or port parameters.


pagp learn-method

Use the pagp learn-method interface configuration command to set the source-address learning method of incoming packets received from an EtherChannel port. Use the no form of this command to return to the default setting.

pagp learn-method aggregation-port

no pagp learn-method

Syntax Description

aggregation-port

Specify address learning on the logical port-channel. The switch transmits packets to the source by using any of the interfaces in the EtherChannel. This setting is the default. With aggregate-port learning, it is not important on which physical port the packet arrives.



Note Though visible in the command-line help strings, the physical-port keyword is not supported.


Defaults

The default is aggregation-port (logical port channel).

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The switch supports address learning only on aggregate ports even though the physical-port keyword is provided in the command-line interface (CLI). The pagp learn-method and the pagp port-priority interface configuration commands have no affect on the switch hardware.


Note You should not set the learn method to physical-port because the switch is an aggregate-learning device.


If the link partner to the switch is a physical learner that has the channel-group interface configuration command set to auto or desirable, the switch automatically uses the load-distribution method based on the source MAC address, regardless of the configured load-distribution method.

If the link partner to the switch is a physical learner that has the channel-group interface configuration command set to on, set the load-distribution method based on the source MAC address by using the port-channel load-balance src-mac global configuration command.

Examples

This example shows how to set the learning method to aggregation-port (the default):

Switch(config-if)# pagp learn-method aggregation-port

You can verify your settings by entering the show running-config or show pagp channel-group-number internal privileged EXEC command.

Related Commands

Command
Description

channel-group

Assigns an Ethernet interface to an EtherChannel group.

pagp port-priority

Selects an interface through which all Port Aggregation Protocol (PAgP) traffic through the EtherChannel is sent.

show pagp

Displays PAgP channel-group information.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


pagp port-priority

You do not need to enter this command. It is documented for informational purposes only. Though visible in the command-line help strings, the switch does not support the pagp port-priority command.

Use the pagp port-priority interface configuration command to select an interface through which all Port Aggregation Protocol (PAgP) traffic through the EtherChannel is sent. Use the no form of this command to return to the default value.

pagp port-priority priority

no pagp port-priority

Syntax Description

priority

A priority number ranging from 0 to 255.


Defaults

The default value is 128.

Command Modes

Interface configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

The pagp learn-method and the pagp port-priority interface configuration commands have no affect on the switch hardware.


Note You should not change the port priority because the switch does not support this command.


Related Commands

Command
Description

pagp learn-method

Sets the source-address learning method of incoming packets received from an EtherChannel port.

show pagp

Displays PAgP channel-group information.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


permit (access-list configuration)

Use the permit access-list configuration command to configure conditions for a named or numbered IP access control list (ACL). Use the no form of the command to remove a permit condition from the IP ACL.

Use these commands with standard IP ACLs:

permit {source source-wildcard | host source | any}

no permit {source source-wildcard | host source | any}

Use these commands with extended IP ACLs:

permit protocol {source source-wildcard | host source | any} [operator port] {destination destination-wildcard | host source | any} [operator port] [dscp dscp-value] [time-range time-range-name]

no permit protocol {source source-wildcard | host source | any} [operator port] {destination destination-wildcard | host source | any} [operator port] [dscp dscp-value] [time-range time-range-name]

This command is available on physical interfaces only if your switch is running the enhanced software image (EI).

Syntax Description

protocol

Name of an IP protocol.

protocol can be ip, tcp, or udp.

source source-wildcard | host source | any

Define a source IP address and wildcard.

The source is the source address of the network or host from which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The source-wildcard applies wildcard bits to the source.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for source and source-wildcard of source 0.0.0.0.

The keyword any as an abbreviation for source and source-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a source-wildcard.

destination destination-wildcard | host destination | any

Define a destination IP address and wildcard.

The destination is the destination address of the network or host to which the packet is being sent, specified in one of these ways:

The 32-bit quantity in dotted-decimal format. The destination-wildcard applies wildcard bits to the destination.

The keyword host, followed by the 32-bit quantity in dotted-decimal format, as an abbreviation for destination and destination-wildcard of destination 0.0.0.0.

The keyword any as an abbreviation for destination and destination-wildcard of 0.0.0.0 255.255.255.255. You do not need to enter a destination-wildcard.

operator port

(Optional) Define a source or destination port.

The operator can be only eq (equal).

If operator is after the source IP address and wildcard, conditions match when the source port matches the defined port.

If operator is after the destination IP address and wildcard, conditions match when the destination port matches the defined port.

The port is a decimal number or name of a Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) port. The number can be from 0 to 65535.

Use TCP port names only for TCP traffic.

Use UDP port names only for UDP traffic.

dscp dscp-value

(Optional) Define a Differentiated Services Code Point (DSCP) value to classify traffic.

For the dscp-value, enter any of the 13 supported DSCP values (0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48, and 56), or use the question mark (?) to see a list of available values.

time-range time-range-name

(Optional) For the time-range keyword, enter a meaningful name to identify the time range. For a more detailed explanation of this keyword, refer to the software configuration guide.


Defaults

There are no specific conditions that permit packets in a named or numbered IP ACL.

The default ACL is always terminated by an implicit deny statement for all packets.

Command Modes

Access-list configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Use this command after the ip access-list global configuration command to specify permit conditions for a named or numbered IP ACL. You can specify a source IP address, destination IP address, IP protocol, TCP port, or UDP port. Specify the TCP and UDP port numbers only if protocol is tcp or udp and operator is eq.


Note For more information about configuring IP ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to create an extended IP ACL and configure permit conditions for it:

Switch(config)# ip access-list extended Internetfilter2
Switch(config-ext-nacl)# permit host 36.10.10.5 any
Switch(config-ext-nacl)# permit host 192.1.10.8 any

This is an example of a standard ACL that sets permit conditions:

ip access-list standard Acclist1
 permit 192.5.34.0  0.0.0.255
 permit 128.88.10.0  0.0.0.255
 permit 36.1.1.0  0.0.0.255

Note In these examples, all other IP access is implicitly denied.


You can verify your settings by entering the show ip access-lists or show access-lists privileged EXEC command.

Related Commands

Command
Description

deny (access-list configuration)

Sets deny conditions for an IP ACL.

ip access-group

Controls access to an interface.

ip access-list

Defines an IP ACL.

show access-lists

Displays ACLs configured on a switch.

show ip access-lists

Displays IP ACLs configured on the switch.


permit (MAC access-list configuration)

Use the permit MAC access-list configuration command to allow Layer 2 traffic to be forwarded if the conditions are matched. Use the no form of the command to remove a permit condition from the named MAC access control list (ACL).

{permit | deny} {any | host src-MAC-addr} {any | host dst-MAC-addr} [aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | mop-console | mop-dump | msdos | mumps | netbios | vines-echo |vines-ip | xns-idp]

no {permit | deny} {any | host src-MAC-addr} {any | host dst-MAC-addr} [aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | mop-console | mop-dump | msdos | mumps | netbios | vines-echo |vines-ip | xns-idp]

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

any

Keyword to specify to permit any source or destination MAC address.

host src-MAC-addr

Define a host MAC address. If the source address for a packet matches the defined address, traffic from that address is permitted. MAC address-based subnets are not allowed.

host dst-MAC-addr

Define a destination MAC address. If the destination address for a packet matches the defined address, traffic to that address is permitted. MAC address-based subnets are not allowed.

aarp

Select Ethertype AppleTalk Address Resolution Protocol that maps a data-link address to a network address.

amber

Select EtherType DEC-Amber.

appletalk

Select EtherType AppleTalk/EtherTalk.

dec-spanning

Select EtherType Digital Equipment Corporation (DEC) spanning tree.

decnet-iv

Select EtherType DECnet Phase IV protocol.

diagnostic

Select EtherType DEC-Diagnostic.

dsm

Select EtherType DEC-DSM.

etype-6000

Select EtherType 0x6000.

etype-8042

Select EtherType 0x8042.

lat

Select EtherType DEC-LAT.

lavc-sca

Select EtherType DEC-LAVC-SCA.

mop-console

Select EtherType DEC-MOP Remote Console.

mop-dump

Select EtherType DEC-MOP Dump.

msdos

Select EtherType DEC-MSDOS.

mumps

Select EtherType DEC-MUMPS.

netbios

Select EtherType DEC- Network Basic Input/Output System (NETBIOS).

vines-echo

Select EtherType Virtual Integrated Network Service (VINES) Echo from Banyan Systems.

vines-ip

Select EtherType VINES IP.

xns-idp

Select EtherType Xerox Network Systems (XNS) protocol suite (from 0 to 65535), an arbitrary Ethertype in decimal, hexadecimal, or octal.


Defaults

This command has no defaults. However, the default action for a MAC-named ACL is to deny.

Command Modes

MAC access-list configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

When an access control entry (ACE) is added to an ACL, an implied deny-any-any condition exists at the end of the list. That is, if there are no matches, the packets are denied. However, before the first ACE is added, the list permits all packets.

These options are not allowed:

Class of service (CoS)

Ethertype number of a packet with Ethernet II or Subnetwork Access Protocol (SNAP) encapsulation

Link Service Access Point (LSAP) number of a packet with 802.2 encapsulation


Note For more information about configuring MAC extended ACLs, refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to define the named MAC extended ACL to deny NETBIOS traffic from any source to MAC address 00c0.00a0.03fa. Traffic matching this list is allowed.

Switch(config-ext-macl)# permit any host 00c0.00a0.03fa netbios

This example shows how to remove the permit condition from the named MAC extended ACL:

Switch(config-ext-macl)# no permit any host 00c0.00a0.03fa netbios

You can verify your settings by entering the show access-lists privileged EXEC command.

Related Commands

Command
Description

deny (MAC access-list configuration)

Prevents Layer 2 traffic from being forwarded if conditions are matched.

mac access-list extended

Creates an ACL based on MAC addresses.

show access-lists

Displays ACLs configured on a switch.


persistence

Use the persistence interface configuration command to set the amount of delay before the link reports a link failure. Use the no form of the command to return to the default settting.

persistence delay

no persistence delay

Syntax Description

delay

The amount of time delay; valid values can be 1 to 20 seconds.


Defaults

The default is enabled and the duration is 3 seconds.

Command Modes

Interface configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

Enter the persistence command before the link enters the profile link-up mode. If the link is already in the profile link-up mode when you enter the persistence value, the new value does not go into effect immediately. Instead, it becomes effective after the profile link goes down and comes back up.

Examples:

This example of the persistence command establishes a delay of 1 second before the link reports a failure:


Switch(config)# interface lo0/1
Switch(config-if)# persistence 1
Switch(config-if)#

Related Commands

Command
Description

show controllers lre status

Displays the status of persistence.


police

Use the police policy-map class configuration command to define a policer for classified traffic. Use the no form of this command to remove an existing policer.

police rate-bps burst-byte [exceed-action {drop | dscp dscp-value}]

no police rate-bps burst-byte [exceed-action {drop | dscp dscp-value}]

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

rate-bps

Specify average traffic rate in bits per second (bps).

For 10/100 ports, the range is 1000000 to 100000000, and the granularity is 1 Mbps.

For Gigabit-capable Ethernet ports, the range is 8000000 to 1016000000, and the granularity is 8 Mbps.

burst-byte

Specify the normal burst size in bytes.

For 10/100 ports, the burst size values are 4096, 8192, 16384, 32768, and 65536.

For Gigabit-capable Ethernet ports, the burst size values are 4096, 8192, 16384, 32768, 65536, 131072, 262144, and 524288.

exceed-action drop

(Optional) When the specified rate is exceeded, specify that the switch drops the packet.

exceed-action dscp dscp-value

(Optional) When the specified rate is exceeded, specify that the switch changes the Differentiated Services Code Point (DSCP) of the packet to the specified dscp-value and then sends the packet.


Defaults

No policers are defined.

Command Modes

Policy-map class configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

You can configure up to six policers on ingress Fast Ethernet ports.

You can configure up to 60 policers on ingress Gigabit-capable Ethernet ports.

Policers cannot be configured on egress Fast Ethernet and Gigabit-capable Ethernet ports.

To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode, use the end command.


Note For more information about configuring access control lists (ACLs), refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to configure a policer that sets the DSCP value to 46 if traffic does not exceed a 1-Mbps average rate with a burst size of 65536 bytes and drops packets if traffic exceeds these conditions:

Switch(config)# policy-map policy1
Switch(config-pmap)# class class1
Switch(config-pmap-c)# set ip dscp 46
Switch(config-pmap-c)# police 1000000 65536 exceed-action drop
Switch(config-pmap-c)# exit

You can verify your settings by entering the show policy-map privileged EXEC command.

Related Commands

Command
Description

policy-map

Creates or modifies a policy map that can be attached to multiple interfaces, and enters policy-map configuration mode.

show policy-map

Displays quality of service (QoS) policy maps.


policy-map

Use the policy-map global configuration command to create or modify a policy map that can be attached to multiple interfaces and to enter policy-map configuration mode. Use the no form of this command to delete an existing policy map and return to global configuration mode.

policy-map policy-map-name

no policy-map policy-map-name

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

policy-map-name

Name of the policy map.


Defaults

No policy maps are defined.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

Entering the policy-map command enables the policy-map configuration mode. These configuration commands are available:

class: defines the classification match criteria for the specified class map. For more information, see the class command.

description: describes the policy map (up to 200 characters).

exit: exits policy-map configuration mode and returns to global configuration mode.

no: removes a previously defined policy map.

rename: renames the policy map.


Note In a policy map, the class named class-default is not supported. The switch does not filter traffic based on the policy map defined by the class class-default policy-map configuration command.


To return to global configuration mode, use the exit command. To return to privileged EXEC mode, use the end command.

Before you can configure policies for classes whose match criteria are defined in a class map, use the policy-map command to specify the name of the policy map to be created or modified. Entering this command also enables the policy-map configuration mode in which you can configure or modify the class policies for that policy map.

You can configure class policies in a policy map only if the classes have match criteria defined for them. Use the class-map and match commands to configure the match criteria for a class. Only one match command per class map is supported.

Only one policy map per interface per direction is supported. You can apply the same policy map to multiple interfaces but only in the ingress direction.


Note For more information about configuring access control lists (ACLs), refer to the "Configuring Network Security with ACLs" chapter in the Catalyst 2950 Desktop Switch Software Configuration Guide for this release.


Examples

This example shows how to create a policy map called policy1. When attached to the ingress direction, it matches all the incoming traffic defined in class1 and polices the traffic at an average rate of 1 Mbps and bursts at 65536 bytes. Traffic exceeding the profile is dropped.

Switch(config)# policy-map policy1
Switch(config-pmap)# class class1
Switch(config-pmap-c)# police 1000000 65536 exceed-action drop
Switch(config-pmap-c)# exit
Switch(config-pmap)#

This example shows how to delete policymap2:

Switch(config)# no policy-map policymap2

You can verify your settings by entering the show policy-map privileged EXEC command.

Related Commands

Command
Description

class

Defines the default CoS value of a port or assigns the default CoS to all incoming packets on the port.

class-map

Creates a class map to be used for matching packets to the class whose name you specify.

police

Defines a policer for classified traffic.

set

Classifies IP traffic by setting a DSCP value in the packet.

show policy-map

Displays quality of service (QoS) policy maps.


port-channel load-balance

Use the port-channel load-balance global configuration command to set the load distribution method among the ports in the EtherChannel. Use the no form of this command to reset the load distribution to the default.

port-channel load-balance method

no port-channel load-balance

Syntax Description

method

Load distribution method.

These are the method values:

dst-mac—Load distribution using the destination MAC address

src-mac—Load distribution using the source MAC address


Defaults

The default method is src-mac.

Command Modes

Global configuration

Command History

Release
Modification

12.1(6)EA2

This command was introduced.


Usage Guidelines

If the link partner to the switch is a physical learner that has the channel-group interface configuration command set to auto or desirable, the switch automatically uses the load-distribution method based on the source MAC address regardless of the configured load-distribution method.

If the link partner to the switch is a physical learner that has the channel-group interface configuration command set to on, set the load-distribution method based on the source MAC address by using the port-channel load-balance src-mac global configuration command.

Examples

This example shows how to set the load-distribution method to dst-mac:

Switch(config)# port-channel load-balance dst-mac

You can verify your settings by entering the show etherchannel privileged EXEC command.

Related Commands

Command
Description

channel-group

Assigns an Ethernet interface to an EtherChannel group.

show etherchannel

Displays EtherChannel information for a channel.

show running-config

Displays the configuration information running on the switch. For syntax information, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS File Management Commands > Configuration File Commands.


profile (interface mode)

Use the profile interface configuration command to add a Long-Reach Ethernet (LRE) profile to a port. Use the no form of this command to delete a profile from the sequence.

profile profile-name

no profile profile-name

Syntax Description

profile-name

Name of the profile. The profile name can be a Cisco-supplied profile or a user-created profile. See the Catalyst 2950 Series Software Configuration Guide for further details on Cisco-supplied profiles.


Defaults

The default is not defined.

Command Modes

Interface mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command can be used to assign a profile to a specific LRE port. The profile command in interface mode has a higher precedence than the profile specified in global scope using the lre profile profile command. If the profile command is not specified, the profile specified in global scope applies to this port.

For a complete list of considerations for using LRE profiles and profile sequences, refer to the "LRE Links and LRE Profiles" section in the Catalyst 2950 Series Software Configuration Guide.

Examples

This example shows how to assign the LRE-8 profile to LRE port 1:

Switch(config)# interface lo0/1
Switch(config-if)# profile lre-8
Switch(config-if)#

This example shows how to return port 1 to global scope from the previous example.

Switch(config)# interface lo0/1
Switch(config-if)# no profile lre-8
Switch(config-if)#

Related Commands

Command
Description

lre rate selection sequence

Assigns the rate selection sequence for the entire switch.

lre sequence

Defines a new sequence.

rate selection

Enables rate selection on a specific port.

rate selection sequence

Assigns a rate selection sequence for a specific port.

show controllers lre profile names

Displays information about the LRE profiles available on the switch.

show controllers lre profile details

Displays information about the LRE profiles and sequences available on the switch.


profile (sequence mode)

Use the profile sequence configuration command to add a Long-Reach Ethernet (LRE) profile to a sequence. Use the no form of this command to delete a profile from the sequence.

profile profile-name

no profile profile-name

Syntax Description

profile-name

Name of the profile. The profile name can be a Cisco-supplied profile or a user-created profile. See the Catalyst 2950 Series Software  Configuration Guide for further details on Cisco-supplied profiles.


Defaults

The default is LRE-10.

Command Modes

Sequence mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

When you add an LRE profile to a sequence, the profile is added as in a first-in, first-out (FIFO) queue. Rate selection attempts to establish a link with the first profile in the sequence. If the link is not established in that profile, rate selection uses the next profile in the queue.

You cannot add a profile in the middle of the sequence. To add a profile to a user-defined sequence in the middle of a sequence, you need to delete the most-recent profiles first.

Although you can delete a profile from a sequence, you cannot change a sequence's configuration if it is in use by an interface.

You cannot add or delete a profile from a system-defined sequence.

For a complete list of considerations for using LRE profiles and profile sequences, refer to the "LRE Links and LRE Profiles" section in the Catalyst 2950 Series Software Configuration Guide.

Examples

This example shows how to assign the LRE-4 profile to the seq2downsym sequence:

Switch(config)# lre sequence seq2downsym
Switch(config-seq)# profile LRE-4
Switch(config-seq)#

Related Commands

Command
Description

lre rate selection sequence

Assigns the rate selection sequence for the entire switch.

lre sequence

Defines a new sequence.

rate selection

Enables rate selection on a specific port.

rate selection sequence

Assigns a sequence for a specific port.


rate selection

Use the rate selection interface configuration command to enable rate selection on a port. Use the no form of this command to disable rate selection on ports already configured for rate selection.

rate selection

no rate selection

Syntax Description

This command has no arguments or keywords.

Defaults

The default is enabled.

Command Modes

Interface configuration mode

Command History

Release
Modification

12.1(11)YJ and 12.1(11)WC6

This command was introduced.


Usage Guidelines

Use this command to enable rate selection on a port. The rate selection command does not cause rate selection to start. To start rate selection, you need to assign a sequence to a port. This command does not specify a sequence. Use the rate selection sequence command or the lre rate selection sequence command.

If a global sequence is configured and rate selection is disabled on the port, rate selection runs on the entire switch except on the port where rate selection is disabled.

Examples

This example disables the rate selection feature on a port:


Switch(config-if)# no rate selection
Switch(config-if)#

Related Commands

Command
Description

rate selection sequence

Assigns a sequence on a port.

lre rate selection sequence

Assigns a sequence for the entire switch.


rate selection profile lock

Use the rate selection profile lock interface configuration command to lock a profile in a port that is enabled for rate selection. Use the no form of the command to unlock a profile in a port.

rate selection profile lock

no rate selection profile lock

Syntax Description

This command has no arguments or keywords.

Command Modes

Interface configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

This command does not enable rate selection. It only has significance when a sequence is assigned to a port.

If rate selection is already converged on the port, this command causes the profile chosen by rate selection to immediately lock. During the lock process, the name of the profile appends to the end of this command. For example, if rate selection converges on LRE-15 and you enter this command, the resulting locked configuration looks like this:

rate selection profile lock LRE-15

If rate selection is not already converged on the port, this command has no immediate effect. However, when rate selection converges for that port, the profile is locked immediately, and the output of the running configuration is saved as in the example.

Examples

This example locks a profile to a port that is running rate selection:


Switch(config-if)# rate selection profile lock
Switch(config-if)#

Related Commands

Command
Description

rate selection sequence

Assigns a sequence on a port.

lre rate selection sequence

Assigns a sequence for the entire switch.

show controllers lre status sequence

Displays information about the profiles and sequences when the sequence parameter is specified.


rate selection sequence

Use the rate selection sequence interface configuration command to assign a sequence to a port and to start rate selection. The no form of the command removes a specific rate selection sequence on a port.

rate selection sequence sequenceName

no rate selection sequence sequenceName

Syntax Description

sequenceName

The name of the sequence being applied to the port. Refer to the Catalyst 2950 Series Software Configuration Guide for a names of system-supplied sequences.


Command Modes

Interface configuration mode

Command History

Release
Modification

12.1(11)YJ

This command was introduced.


Usage Guidelines

A sequence is a list of profiles. Using this command overrides the default profile of LRE-10 and assigns a sequence of your choice.

When rate selection is enabled, profiles and sequences follow a predefined priority scheme that determines the rate for a port or for the entire switch. In general, sequences have priority over standalone profiles, and per-port configurations have priority over switch-wide configurations. Specifically, these are the priority levels with rate selection enabled, from highest to lowest:

1. Per-port sequence

2. Global sequence

3. Port profile

4. Global profile

Cisco provides a set of preconfigured sequences, called system-defined sequences. System-defined sequences cannot be modified. Users can create and modify their own sequences by using the profile command.

The rate selection sequence command is rejected if the specified sequence does not exist or is a null sequence. A null sequence is a sequence that does not have any profiles.

For further details on profiles, sequences and their priority scheme, see Catalyst 2950 Series Software Configuration Guide.

Examples

This example applies the sequence, CISCO-COMPLETE-SEQUENCE to the port:


Switch(config-if)# rate selection sequence CISCO-COMPLETE-SEQUENCE
Switch(config-if)#

Related Commands

Command
Description

rate selection

Enables rate selection on ports already configured for rate selection.

show controllers lre sequence

Displays the list of sequences.


rcommand

Use the rcommand user EXEC command to start a Telnet session and to enter commands from the command switch for a member switch. To end the session, enter the exit command.

rcommand {n | commander | mac-address hw-addr}

Syntax Description

n

Provide the number that identifies a cluster member. The range is from 0 to 15.

commander

Provide access to the command switch from a member switch.

mac-address hw-addr

MAC address of the member switch.


Command Modes

User EXEC

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

If the switch is the command switch but the member switch n does not exist, an error message appears. To obtain the switch number, enter the show cluster members privileged EXEC command on the command switch.

You can use this command to access a member switch from the command-switch prompt or to access a command switch from the member-switch prompt.

For Catalyst 2900 XL, 2950, 3500 XL, and 3550 switches, the Telnet session accesses the member-switch command-line interface (CLI) at the same privilege level as on the command switch. For example, if you enter this command at user level on the cluster command switch, the member switch is accessed at user level. If you use this command on the command switch at privileged level, the command accesses the remote device at privileged level. If you use an intermediate enable-level lower than privileged, access to the member switch is at user level.

For Catalyst 1900 and 2820 switches running standard edition software, the Telnet session accesses the menu console (the menu-driven interface) if the command switch is at privilege level 15. If the command switch is at privilege level 1, you are prompted for the password before being able to access the menu console. Command switch privilege levels map to the member switches running standard edition software as follows:

If the command switch privilege level is from 1 to 14, the member switch is accessed at privilege level 1.

If the command switch privilege level is 15, the member switch is accessed at privilege level 15.

The Catalyst 1900 and 2820 CLI is available only on switches running Enterprise Edition Software.

This command does not work if the vty lines of the command switch have access-class configurations.

You are not prompted for a password because the member switches inherited the password of the command switch when they joined the cluster.

Examples

This example shows how to start a session with member 3. All subsequent commands are directed to member 3 until you enter the exit command or close the session.

Switch# rcommand 3
Switch-3# show version
Cisco Internet Operating System Software ...
...
Switch-3# exit
Switch#

Related Commands

Command
Description

show cluster members

Displays information about the cluster members.


remote-span

Use the remote-span VLAN configuration command to add the Remote Switched Port Analyzer (RSPAN) feature to a VLAN. Use the no form of this command to remove the RSPAN feature from the VLAN.

remote-span

no remote-span

This command is available only if your switch is running the enhanced software image (EI).

Syntax Description

This command has no arguments or keywords.

Defaults

No RSPAN VLANs are defined.

Command Modes

VLAN configuration

Command History

Release
Modification

12.1(11)EA1

This command was introduced.


Usage Guidelines

When a VLAN is converted from a normal VLAN to an RSPAN VLAN (or the reverse), the VLAN is first deleted and is then recreated with the new configuration. The RSPAN feature is propagated by VLAN Trunking Protocol (VTP) for VLAN-IDs that are lower than 1005.

Before you configure the RSPAN remote-span feature, use the vlan (global configuration) command to create the VLAN.

Examples

This example shows how to configure an RSPAN VLAN.

Switch(config)# vlan 901
Switch(config-vlan)# remote-span

This example shows how to remove the RSPAN feature from a VLAN.

Switch(config)# vlan 901
Switch(config-vlan)# no remote-span

You can verify your settings by entering the show vlan user EXEC command.

Related Commands

Command
Description

monitor session

Enables SPAN and RSPAN monitoring on a port and configures a port as a source or destination port.

vlan (global configuration)

Changes to config-vlan mode where you can configure VLANs 1 to 1005. Do not enter leading zeros.


rmon collection stats

Use the rmon collection stats interface configuration command to collect Ethernet group statistics. The Ethernet group statistics include utilization statistics about broadcast and multicast packets and error statistics about Cyclic Redundancy Check (CRC) alignment errors and collisions. Use the no form of this command to return to the default setting.

rmon collection stats index [owner name]

no rmon collection stats index [owner name]

Syntax Description

index

Remote Network Monitoring (RMON) collection control index. The range is 1 to 65535.

owner name

(Optional) Owner of the RMON collection.


Defaults

The RMON statistics collection is disabled.

Command Modes

Interface configuration

Command History

Release
Modification

12.0(5.2)WC(1)

This command was introduced.


Usage Guidelines

The RMON statistics collection command is based on hardware counters.

Examples

This example shows how to collect RMON statistics for the owner root on an interface:

Switch(config)# interface fastethernet0/1
Switch(config-if)# rmon collection stats 2 owner root

You can verify your settings by entering the show rmon statistics privileged EXEC command.

Related Commands

Command
Description

show rmon statistics

Displays RMON statistics.

For more information on this command, select Cisco IOS Configuration Fundamentals Command Reference for Release 12.1 > Cisco IOS System Management Commands > RMON Commands.