Catalyst 2960-XR Switch Security Command Reference, Cisco IOS Release 15.2(2)E
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- Updated:
- June 24, 2014
Chapter: Security Commands
Security Commands
- aaa accounting dot1x
- aaa accounting identity
- aaa authentication dot1x
- aaa authorization network
- authentication host-mode
- authentication mac-move permit
- authentication priority
- authentication violation
- cisp enable
- clear errdisable interface vlan
- clear mac address-table
- deny (MAC access-list configuration)
- device-role (IPv6 snooping)
- device-role (IPv6 nd inspection)
- dot1x critical (global configuration)
- dot1x pae
- dot1x supplicant controlled transient
- dot1x supplicant force-multicast
- dot1x test eapol-capable
- dot1x test timeout
- dot1x timeout
- epm access-control open
- ip admission
- ip admission name
- ip device tracking maximum
- ip device tracking probe
- ip dhcp snooping database
- ip dhcp snooping information option format remote-id
- ip dhcp snooping verify no-relay-agent-address
- ip source binding
- ip verify source
- ipv6 snooping policy
- limit address-count
- mab request format attribute 32
- match (access-map configuration)
- no authentication logging verbose
- no dot1x logging verbose
- no mab logging verbose
- permit (MAC access-list configuration)
- protocol (IPv6 snooping)
- security level (IPv6 snooping)
- show aaa acct-stop-cache
- show aaa clients
- show aaa command handler
- show aaa local
- show aaa servers
- show aaa sessions
- show authentication sessions
- show cisp
- show dot1x
- show eap pac peer
- show ip dhcp snooping statistics
- show radius server-group
- show vlan access-map
- show vlan group
- switchport port-security aging
- switchport port-security mac-address
- switchport port-security maximum
- switchport port-security violation
- tracking (IPv6 snooping)
- trusted-port
- vlan access-map
- vlan filter
- vlan group
aaa accounting dot1x
To enable authentication, authorization, and accounting (AAA) accounting and to create method lists defining specific accounting methods on a per-line or per-interface basis for IEEE 802.1x sessions, use the aaa accounting dot1xcommand in global configuration mode. To disable IEEE 802.1x accounting, use the no form of this command.
aaa accounting dot1x { name | default } start-stop { broadcast group { name | radius | tacacs+} [ group { name | radius | tacacs+} ... ] | group { name | radius | tacacs+} [ group { name | radius | tacacs+} ... ]}
no aaa accounting dot1x { name | default }
Syntax Description
| name |
Name of a server group. This is optional when you enter it after the broadcast group and group keywords. |
| default |
Specifies the accounting methods that follow as the default list for accounting services. |
| start-stop |
Sends a start accounting notice at the beginning of a process and a stop accounting notice at the end of a process. The start accounting record is sent in the background. The requested user process begins regardless of whether or not the start accounting notice was received by the accounting server. |
| broadcast |
Enables accounting records to be sent to multiple AAA servers and sends accounting records to the first server in each group. If the first server is unavailable, the switch uses the list of backup servers to identify the first server. |
| group |
The group keyword is optional when you enter it after the broadcast group and group keywords. You can enter more than optional group keyword. |
| radius |
(Optional) Enables RADIUS accounting. |
| tacacs+ |
(Optional) Enables TACACS+ accounting. |
Command Default
AAA accounting is disabled.
Command Modes
Global configuration
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
This command requires access to a RADIUS server.
We recommend that you enter the dot1x reauthentication interface configuration command before configuring IEEE 802.1x RADIUS accounting on an interface.
Examples
This example shows how to configure IEEE 802.1x accounting:
Switch(config)# aaa new-model Switch(config)# aaa accounting dot1x default start-stop group radius
aaa accounting identity
To enable authentication, authorization, and accounting (AAA) accounting for IEEE 802.1x, MAC authentication bypass (MAB), and web authentication sessions, use the aaa accounting identity command in global configuration mode. To disable IEEE 802.1x accounting, use the no form of this command.
aaa accounting identity { name | default } start-stop { broadcast group { name | radius | tacacs+} [ group { name | radius | tacacs+} ... ] | group { name | radius | tacacs+} [ group { name | radius | tacacs+} ... ]}
no aaa accounting identity { name | default }
Syntax Description
| name |
Name of a server group. This is optional when you enter it after the broadcast group and group keywords. |
| default |
Uses the accounting methods that follow as the default list for accounting services. |
| start-stop |
Sends a start accounting notice at the beginning of a process and a stop accounting notice at the end of a process. The start accounting record is sent in the background. The requested-user process begins regardless of whether or not the start accounting notice was received by the accounting server. |
| broadcast |
Enables accounting records to be sent to multiple AAA servers and send accounting records to the first server in each group. If the first server is unavailable, the switch uses the list of backup servers to identify the first server. |
| group |
The group keyword is optional when you enter it after the broadcast group and group keywords. You can enter more than optional group keyword. |
| radius |
(Optional) Enables RADIUS authorization. |
| tacacs+ |
(Optional) Enables TACACS+ accounting. |
Command Default
AAA accounting is disabled.
Command Modes
Global configuration
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
To enable AAA accounting identity, you need to enable policy mode. To enable policy mode, enter the authentication display new-style command in privileged EXEC mode.
Examples
This example shows how to configure IEEE 802.1x accounting identity:
Switch# authentication display new-style Please note that while you can revert to legacy style configuration at any time unless you have explicitly entered new-style configuration, the following caveats should be carefully read and understood. (1) If you save the config in this mode, it will be written to NVRAM in NEW-style config, and if you subsequently reload the router without reverting to legacy config and saving that, you will no longer be able to revert. (2) In this and legacy mode, Webauth is not IPv6-capable. It will only become IPv6-capable once you have entered new- style config manually, or have reloaded with config saved in 'authentication display new' mode. Switch# configure terminal Switch(config)# aaa accounting identity default start-stop group radius
aaa authentication dot1x
To specify the authentication, authorization, and accounting (AAA) method to use on ports complying with the IEEE 802.1x authentication, use the aaa authentication dot1x command in global configuration mode on the switch stack or on a standalone switch. To disable authentication, use the no form of this command.
aaa authentication dot1x { default} method1
no aaa authentication dot1x { default} method1
Syntax Description
| default |
The default method when a user logs in. Use the listed authentication method that follows this argument. |
||
| method1 |
Specifies the server authentication. Enter the group radius keywords to use the list of all RADIUS servers for authentication.
|
Command Default
No authentication is performed.
Command Modes
Global configuration
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The method argument identifies the method that the authentication algorithm tries in the specified sequence to validate the password provided by the client. The only method that is IEEE 802.1x-compliant is the group radius method, in which the client data is validated against a RADIUS authentication server.
If you specify group radius, you must configure the RADIUS server by entering the radius-server host global configuration command.
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 IEEE 802.1x-compliant authentication list. This authentication first tries to contact a RADIUS server. If this action returns an error, the user is not allowed access to the network.
Switch(config)# aaa new-model Switch(config)# aaa authentication dot1x default group radius
aaa authorization network
To the configure the switch to use user-RADIUS authorization for all network-related service requests, such as IEEE 802.1x VLAN assignment, use the aaa authorization network command in global configuration mode. To disable RADIUS user authorization, use the no form of this command
aaa authorization network default group radius
no aaa authorization network default
Syntax Description
| default group radius |
Use the list of all RADIUS hosts in the server group as the default authorization list. |
Command Default
Authorization is disabled.
Command Modes
Global configuration
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use the aaa authorization network default group radius global configuration command to allow the switch to download IEEE 802.1x authorization parameters from the RADIUS servers in the default authorization list. The authorization parameters are used by features such as VLAN assignment to get parameters from the RADIUS servers.
Use the show running-config privileged EXEC command to display the configured lists of authorization methods.
Examples
This example shows how to configure the switch for user RADIUS authorization for all network-related service requests:
Switch(config)# aaa authorization network default group radius
authentication host-mode
To set the authorization manager mode on a port, use the authentication host-mode command in interface configuration mode. To return to the default setting, use the no form of this command.
authentication host-mode { multi-auth | multi-domain | multi-host | single-host}
no authentication host-mode
Syntax Description
| multi-auth |
Enables multiple-authorization mode (multi-auth mode) on the port. |
| multi-domain |
Enables multiple-domain mode on the port. |
| multi-host |
Enables multiple-host mode on the port. |
| single-host |
Enables single-host mode on the port. |
Command Default
Single host mode is enabled.
Command Modes
Interface configuration
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Single-host mode should be configured if only one data host is connected. Do not connect a voice device to authenticate on a single-host port. Voice device authorization fails if no voice VLAN is configured on the port.
Multi-domain mode should be configured if data host is connected through an IP phone to the port. Multi-domain mode should be configured if the voice device needs to be authenticated.
Multi-auth mode should be configured to allow devices behind a hub to obtain secured port access through individual authentication. Only one voice device can be authenticated in this mode if a voice VLAN is configured.
Multi-host mode also offers port access for multiple hosts behind a hub, but multi-host mode gives unrestricted port access to the devices after the first user gets authenticated.
Examples
This example shows how to enable multi-auth mode on a port:
Switch(config-if)# authentication host-mode multi-auth
This example shows how to enable multi-domain mode on a port:
Switch(config-if)# authentication host-mode multi-domain
This example shows how to enable multi-host mode on a port:
Switch(config-if)# authentication host-mode multi-host
This example shows how to enable single-host mode on a port:
Switch(config-if)# authentication host-mode single-host
You can verify your settings by entering the show authentication sessions interface interface details privileged EXEC command.
authentication mac-move permit
To enable MAC move on a switch, use the authentication mac-move permit command in global configuration mode. To disable MAC move, use the no form of this command.
authentication mac-move permit
no authentication mac-move permit
Syntax Description
Command Default
Command Modes
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The command enables authenticated hosts to move between ports on a switch. For example, if there is a device between an authenticated host and port, and that host moves to another port, the authentication session is deleted from the first port, and the host is reauthenticated on the new port.
If MAC move is disabled, and an authenticated host moves to another port, it is not reauthenticated, and a violation error occurs.
Examples
This example shows how to enable MAC move on a switch:
Switch(config)# authentication mac-move permit
authentication priority
To add an authentication method to the port-priority list, use the authentication priority command in interface configuration mode. To return to the default, use the no form of this command.
authentication priority [ dot1x | mab] { webauth}
no authentication priority [ dot1x | mab] { webauth}
Syntax Description
Command Default
The default priority is 802.1x authentication, followed by MAC authentication bypass and web authentication.
Command Modes
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Ordering sets the order of methods that the switch attempts when trying to authenticate a new device is connected to a port.
When configuring multiple fallback methods on a port, set web authentication (webauth) last.
Assigning priorities to different authentication methods allows a higher-priority method to interrupt an in-progress authentication method with a lower priority.
 Note | If a client is already authenticated, it might be reauthenticated if an interruption from a higher-priority method occurs. |
The default priority of an authentication method is equivalent to its position in execution-list order: 802.1x authentication, MAC authentication bypass (MAB), and web authentication. Use the dot1x, mab, and webauth keywords to change this default order.
Examples
This example shows how to set 802.1x as the first authentication method and web authentication as the second authentication method:
Switch(config-if)# authentication priority dotx webauth
This example shows how to set MAB as the first authentication method and web authentication as the second authentication method:
Switch(config-if)# authentication priority mab webauth
Related Commands
authentication violation
To configure the violation modes that occur when a new device connects to a port or when a new device connects to a port after the maximum number of devices are connected to that port, use the authentication violation command in interface configuration mode.
authentication violation{ protect| replace| restrict| shutdown }
no authentication violation{ protect| replace| restrict| shutdown }
Syntax Description
| protect |
Drops unexpected incoming MAC addresses. No syslog errors are generated. |
| replace |
Removes the current session and initiates authentication with the new host. |
| restrict |
Generates a syslog error when a violation error occurs. |
| shutdown |
Error-disables the port or the virtual port on which an unexpected MAC address occurs. |
Command Default
Authentication violation shutdown mode is enabled.
Command Modes
Interface configuration
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use the authentication violation command to specify the action to be taken when a security violation occurs on a port.
Examples
This example shows how to configure an IEEE 802.1x-enabled port as error-disabled and to shut down when a new device connects it:
Switch(config-if)# authentication violation shutdown
This example shows how to configure an 802.1x-enabled port to generate a system error message and to change the port to restricted mode when a new device connects to it:
Switch(config-if)# authentication violation restrict
This example shows how to configure an 802.1x-enabled port to ignore a new device when it connects to the port:
Switch(config-if)# authentication violation protect
This example shows how to configure an 802.1x-enabled port to remove the current session and initiate authentication with a new device when it connects to the port:
Switch(config-if)# authentication violation replace
You can verify your settings by entering the show authentication privileged EXEC command.
cisp enable
To enable Client Information Signaling Protocol (CISP) on a switch so that it acts as an authenticator to a supplicant switch, use the cisp enable global configuration command.
cisp enable
no cisp enable
Syntax Description
Command Default
Command Modes
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The link between the authenticator and supplicant switch is a trunk. When you enable VTP on both switches, the VTP domain name must be the same, and the VTP mode must be server.
To avoid the MD5 checksum mismatch error when you configure VTP mode, verify that:
Examples
This example shows how to enable CISP:
Switch(config)# cisp enable
Related Commands
|
dot1x supplicant force-multicast |
Forces 802.1X supplicant to send multicast packets. |
|
dot1x supplicant controlled transient |
Configures controlled access by 802.1X supplicant. |
clear errdisable interface vlan
To reenable a VLAN that was error-disabled, use the clear errdisable interface command in privileged EXEC mode.
clear errdisable interface interface-id vlan [ vlan-list]
Syntax Description
|
(Optional) Specifies a list of VLANs to be reenabled. If a VLAN list is not specified, then all VLANs are reenabled. |
Command Default
Command Modes
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You can reenable a port by using the shutdown and no shutdown interface configuration commands, or you can clear error-disable for VLANs by using the clear errdisable interface command.
Examples
This example shows how to reenable all VLANs that were error-disabled on Gigabit Ethernet port 4/0/2:
Switch# clear errdisable interface gigabitethernet4/0/2 vlan
Related Commands
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Enables error-disabled detection for a specific cause or all causes. |
|
|
Displays interface status of a list of interfaces in error-disabled state. |
clear mac address-table
To delete from the MAC address table a specific dynamic address, all dynamic addresses on a particular interface, all dynamic addresses on stack members, or all dynamic addresses on a particular VLAN, use the clear mac address-table command in privileged EXEC mode. This command also clears the MAC address notification global counters.
clear mac address-table { dynamic [ address mac-addr | interface interface-id | vlan vlan-id] | move update | notification}
Syntax Description
Command Default
Command Modes
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You can verify that the information was deleted by entering the show mac address-table privileged EXEC command.
Examples
This example shows how to remove a specific MAC address from the dynamic address table:
Switch# clear mac address-table dynamic address 0008.0070.0007
Related Commands
deny (MAC access-list configuration)
To prevent non-IP traffic from being forwarded if the conditions are matched, use the deny MAC access-list configuration command on the switch stack or on a standalone switch. To remove a deny condition from the named MAC access list, use the no form of this command.
deny { any | host src-MAC-addr | src-MAC-addr mask} { any | host dst-MAC-addr | dst-MAC-addr mask} [ type mask | aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | lsap lsap mask | mop-console | mop-dump | msdos | mumps | netbios | vines-echo | vines-ip | xns-idp] [ cos cos]
no deny { any | host src-MAC-addr | src-MAC-addr mask} { any | host dst-MAC-addr | dst-MAC-addr mask} [ type mask | aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | lsap lsap mask | mop-console | mop-dump | msdos | mumps | netbios | vines-echo | vines-ip | xns-idp] [ cos cos]
Syntax Description
Command Default
This command has no defaults. However, the default action for a MAC-named ACL is to deny.
Command Modes
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You enter MAC-access list configuration mode by using the mac access-list extended global configuration command.
If you use the host keyword, you cannot enter an address mask; if you do not use the host keyword, you must enter an address mask.
When an access control entry (ACE) is added to an access control list, 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.
To filter IPX traffic, you use the type mask or lsap lsap mask keywords, depending on the type of IPX encapsulation being used. Filter criteria for IPX encapsulation types as specified in Novell terminology and Cisco IOS terminology are listed in the table.
Examples
This example shows how to define the named MAC extended access list 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 access list:
Switch(config-ext-macl)# no deny any 00c0.00a0.03fa 0000.0000.0000 netbios.
This example denies all packets with EtherType 0x4321:
Switch(config-ext-macl)# deny any any 0x4321 0
You can verify your settings by entering the show access-lists privileged EXEC command.
Related Commands
|
Creates an access list based on MAC addresses for non-IP traffic. |
|
|
Permits from the MAC access-list configuration. Permits non-IP traffic to be forwarded if conditions are matched. |
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device-role (IPv6 snooping)
To specify the role of the device attached to the port, use the device-role command in IPv6 snooping configuration mode.
device-role { node | switch}
Syntax Description
| node |
Sets the role of the attached device to node. |
| switch |
Sets the role of the attached device to switch. |
Command Default
The device role is node.
Command Modes
IPv6 snooping configuration
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The device-role command specifies the role of the device attached to the port. By default, the device role is node.
The switch keyword indicates that the remote device is a switch and that the local switch is now operating in multiswitch mode; binding entries learned from the port will be marked with trunk_port preference level. If the port is configured as a trust-port, binding entries will be marked with trunk_trusted_port preference level.
Examples
This example shows how to define an IPv6 snooping policy name as policy1, place the device in IPv6 snooping configuration mode, and configure the device as the node:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# device-role node
device-role (IPv6 nd inspection)
To specify the role of the device attached to the port, use the device-role command in neighbor discovery (ND) inspection policy configuration mode.
device-role { host | monitor | router | switch}
Syntax Description
| host |
Sets the role of the attached device to host. |
| monitor |
Sets the role of the attached device to monitor. |
| router |
Sets the role of the attached device to router. |
| switch |
Sets the role of the attached device to switch. |
Command Default
The device role is host.
Command Modes
ND inspection policy configuration
Command History
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Release |
Modification |
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The device-role command specifies the role of the device attached to the port. By default, the device role is host, and therefore all the inbound router advertisement and redirect messages are blocked. If the device role is enabled using the router keyword, all messages (router solicitation [RS], router advertisement [RA], or redirect) are allowed on this port.
When the router or monitor keyword is used, the multicast RS messages are bridged on the port, regardless of whether limited broadcast is enabled. However, the monitor keyword does not allow inbound RA or redirect messages. When the monitor keyword is used, devices that need these messages will receive them.
The switch keyword indicates that the remote device is a switch and that the local switch is now operating in multiswitch mode; binding entries learned from the port will be marked with trunk_port preference level. If the port is configured as a trust-port, binding entries will be marked with trunk_trusted_port preference level.Examples
The following example defines a Neighbor Discovery Protocol (NDP) policy name as policy1, places the device in ND inspection policy configuration mode, and configures the device as the host:
Switch(config)# ipv6 nd inspection policy policy1 Switch(config-nd-inspection)# device-role host
dot1x critical (global configuration)
To configure the IEEE 802.1X critical authentication parameters, use the dot1x critical command in global configuration mode.
dot1x critical eapol
Syntax Description
| eapol |
Specifies that the switch send an EAPOL-Success message when the switch successfully authenticates the critical port. |
Command Default
eapol is disabled
Command Modes
Global configuration
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This example shows how to specify that the switch sends an EAPOL-Success message when the switch successfully authenticates the critical port:
Switch(config)# dot1x critical eapol
dot1x pae
To set the Port Access Entity (PAE) type, use the dot1x pae command in interface configuration mode. To disable the PAE type that was set, use the no form of this command.
dot1x pae { supplicant | authenticator}
no dot1x pae { supplicant | authenticator}
Syntax Description
| supplicant |
The interface acts only as a supplicant and will not respond to messages that are meant for an authenticator. |
| authenticator |
The interface acts only as an authenticator and will not respond to any messages meant for a supplicant. |
Command Default
PAE type is not set.
Command Modes
Interface configuration
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use the no dot1x pae interface configuration command to disable IEEE 802.1x authentication on the port.
When you configure IEEE 802.1x authentication on a port, such as by entering the dot1x port-control interface configuration command, the switch automatically configures the port as an IEEE 802.1x authenticator. After the no dot1x pae interface configuration command is entered, the Authenticator PAE operation is disabled.
Examples
The following example shows that the interface has been set to act as a supplicant:
Switch(config)# interface g1/0/3 Switch(config-if)# dot1x pae supplicant
dot1x supplicant controlled transient
To control access to an 802.1x supplicant port during authentication, use the dot1x supplicant controlled transient command in global configuration mode. To open the supplicant port during authentication, use the no form of this command
dot1x supplicant controlled transient
no dot1x supplicant controlled transient
Syntax Description
This command has no arguments or keywords.
Command Default
Access is allowed to 802.1x supplicant ports during authentication.
Command Modes
Global configuration
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
In the default state, when you connect a supplicant switch to an authenticator switch that has BPCU guard enabled, the authenticator port could be error-disabled if it receives a Spanning Tree Protocol (STP) bridge protocol data unit (BPDU) packets before the supplicant switch has authenticated. Beginning with Cisco IOS Release 15.0(1)SE, you can control traffic exiting the supplicant port during the authentication period. Entering the dot1x supplicant controlled transient global configuration command temporarily blocks the supplicant port during authentication to ensure that the authenticator port does not shut down before authentication completes. If authentication fails, the supplicant port opens. Entering the no dot1x supplicant controlled transient global configuration command opens the supplicant port during the authentication period. This is the default behavior.
We strongly recommend using the dot1x supplicant controlled transient command on a supplicant switch when BPDU guard is enabled on the authenticator switch port with the spanning-tree bpduguard enable interface configuration command.
Examples
This example shows how to control access to 802.1x supplicant ports on a switch during authentication:
Switch(config)# dot1x supplicant controlled transient
dot1x supplicant force-multicast
To force a supplicant switch to send only multicast Extensible Authentication Protocol over LAN (EAPOL) packets whenever it receives multicast or unicast EAPOL packets, use the dot1x supplicant force-multicast command in global configuration mode. To return to the default setting, use the no form of this command.
dot1x supplicant force-multicast
no dot1x supplicant force-multicast
Syntax Description
This command has no arguments or keywords.
Command Default
The supplicant switch sends unicast EAPOL packets when it receives unicast EAPOL packets. Similarly, it sends multicast EAPOL packets when it receives multicast EAPOL packets.
Command Modes
Command History
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Release |
Modification |
|---|---|
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Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Enable this command on the supplicant switch for Network Edge Access Topology (NEAT) to work in all host modes.
Examples
This example shows how force a supplicant switch to send multicast EAPOL packets to the authenticator switch:
Switch(config)# dot1x supplicant force-multicast
Related Commands
|
Enable Client Information Signalling Protocol (CISP) on a switch so that it acts as an authenticator to a supplicant switch. |
|
dot1x test eapol-capable
To monitor IEEE 802.1x activity on all the switch ports and to display information about the devices that are connected to the ports that support IEEE 802.1x, use the dot1x test eapol-capable command in privileged EXEC mode on the switch stack or on a standalone switch.
dot1x test eapol-capable [ interface interface-id]
Syntax Description
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use this command to test the IEEE 802.1x capability of the devices connected to all ports or to specific ports on a switch.
Examples
This example shows how to enable the IEEE 802.1x readiness check on a switch to query a port. It also shows the response received from the queried port verifying that the device connected to it is IEEE 802.1x-capable:
Switch# dot1x test eapol-capable interface gigabitethernet1/0/13 DOT1X_PORT_EAPOL_CAPABLE:DOT1X: MAC 00-01-02-4b-f1-a3 on gigabitethernet1/0/13 is EAPOL capable
Related Commands
|
Configures the timeout used to wait for EAPOL response to an IEEE 802.1x readiness query. |
dot1x test timeout
To configure the timeout used to wait for EAPOL response from a port being queried for IEEE 802.1x readiness, use the dot1x test timeout command in global configuration mode on the switch stack or on a standalone switch.
dot1x test timeout timeout
Syntax Description
|
Time in seconds to wait for an EAPOL response. The range is from 1 to 65535 seconds. |
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use this command to configure the timeout used to wait for EAPOL response.
Examples
This example shows how to configure the switch to wait 27 seconds for an EAPOL response:
Switch# dot1x test timeout 27
You can verify the timeout configuration status by entering the show run privileged EXEC command.
Related Commands
|
Checks for IEEE 802.1x readiness on devices connected to all or to specified IEEE 802.1x-capable ports. |
dot1x timeout
To configure the value for retry timeouts, use the dot1x timeout command in global configuration or interface configuration mode. To return to the default value for retry timeouts, use the no form of this command.
dot1x timeout { auth-period seconds | held-period seconds | quiet-period seconds | ratelimit-period seconds | server-timeout seconds | start-period seconds | supp-timeout seconds | tx-period seconds}
Syntax Description
| auth-period seconds |
Configures the time, in seconds for which a supplicant will stay in the HELD state (that is, the length of time it will wait before trying to send the credentials again after a failed attempt). The range is from 1 to 65535. The default is 30. |
| held-period seconds |
Configures the time, in seconds for which a supplicant will stay in the HELD state (that is, the length of time it will wait before trying to send the credentials again after a failed attempt). The range is from 1 to 65535. The default is 60 |
| quiet-period seconds |
Configures the time, in seconds, that the authenticator (server) remains quiet (in the HELD state) following a failed authentication exchange before trying to reauthenticate the client. The range is from 1 to 65535. The default is 60 |
| ratelimit-period seconds |
Throttles the EAP-START packets that are sent from misbehaving client PCs (for example, PCs that send EAP-START packets that result in the wasting of switch processing power). |
| server-timeout seconds |
Configures the interval, in seconds, between two successive EAPOL-Start frames when they are being retransmitted. If the server does not send a response to an 802.1X packet within the specified period, the packet is sent again. |
| start-period seconds |
Configures the interval, in seconds, between two successive EAPOL-Start frames when they are being retransmitted. The range is from 1 to 65535. The default is 30. |
| supp-timeout seconds |
Sets the authenticator-to-supplicant retransmission time for all EAP messages other than EAP Request ID. The range is from 1 to 65535. The default is 30. |
| tx-period seconds |
Configures the number of seconds between retransmission of EAP request ID packets (assuming that no response is received) to the client. |
Command Default
Periodic reauthentication and periodic rate-limiting are done.
Command Modes
Interface configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
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.
The dot1x timeout reauth-period interface configuration command affects the behavior of the switch only if you have enabled periodic re-authentication by using the dot1x reauthentication interface configuration command.
During the quiet period, the switch does not accept or initiate any authentication requests. If you want to provide a faster response time to the user, enter a number smaller than the default.
When the ratelimit-period is set to 0 (the default), the switch does not ignore EAPOL packets from clients that have been successfully authenticated and forwards them to the RADIUS server.
Examples
The following example shows that various 802.1X retransmission and timeout periods have been set:
Switch(config)# configure terminal Switch(config)# interface g1/0/3 Switch(config-if)# dot1x port-control auto Switch(config-if)# dot1x timeout auth-period 2000 Switch(config-if)# dot1x timeout held-period 2400 Switch(config-if)# dot1x timeout quiet-period 600 Switch(config-if)# dot1x timeout start-period 90 Switch(config-if)# dot1x timeout supp-timeout 300 Switch(config-if)# dot1x timeout tx-period 60 Switch(config-if)# dot1x timeout server-timeout 60
epm access-control open
To configure an open directive for ports that do not have an access control list (ACL) configured, use the epm access-control open command in global configuration mode. To disable the open directive, use the no form of this command.
epm access-control open
no epm access-control open
Syntax Description
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use this command to configure an open directive that allows hosts without an authorization policy to access ports configured with a static ACL. If you do not configure this command, the port applies the policies of the configured ACL to the traffic. If no static ACL is configured on a port, both the default and open directives allow access to the port.
You can verify your settings by entering the show running-config privileged EXEC command.
Examples
This example shows how to configure an open directive.
Switch(config)# epm access-control open
Related Commands
|
Displays the contents of the current running configuration file. |
ip admission
To enable web authentication, use the ip admission command in interface configuration mode. You can also use this command in fallback-profile configuration mode. To disable web authentication, use the no form of this command.
ip admission rule
no ip admission rule
Syntax Description
| rule |
IP admission rule name. |
Command Default
Web authentication is disabled.
Command Modes
Interface configuration
Fallback-profile configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The ip admission command applies a web authentication rule to a switch port.
Examples
This example shows how to apply a web authentication rule to a switchport:
Switch# configure terminal Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# ip admission rule1
This example shows how to apply a web authentication rule to a fallback profile for use on an IEEE 802.1x enabled switch port.
Switch# configure terminal Switch(config)# fallback profile profile1 Switch(config-fallback-profile)# ip admission rule1
ip admission name
To enable web authentication, use the ip admission name command in global configuration mode. To disable web authentication, use the no form of this command.
ip admission name name { consent | proxy http} [ absolute timer minutes | inactivity-time minutes | list { acl | acl-name} | service-policy type tag service-policy-name]
no ip admission name name { consent | proxy http} [ absolute timer minutes | inactivity-time minutes | list { acl | acl-name} | service-policy type tag service-policy-name]
Syntax Description
| name |
Name of network admission control rule. |
| consent |
Associates an authentication proxy consent web page with the IP admission rule specified using the admission-name argument. |
| proxy http |
Configures web authentication custom page. |
| absolute-timer minutes |
(Optional) Elapsed time, in minutes, before the external server times out. |
| inactivity-time minutes |
(Optional) Elapsed time, in minutes, before the external file server is deemed unreachable. |
| list | (Optional) Associates the named rule with an access control list (ACL). |
| acl |
Applies a standard, extended list to a named admission control rule. The value ranges from 1 through 199, or from 1300 through 2699 for expanded range. |
| acl-name |
Applies a named access list to a named admission control rule. |
| service-policy type tag |
(Optional) A control plane service policy is to be configured. |
| service-policy-name |
Control plane tag service policy that is configured using the policy-map type control tagpolicyname command, keyword, and argument. This policy map is used to apply the actions on the host when a tag is received. |
Command Default
Web authentication is disabled.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The ip admission name command globally enables web authentication on a switch.
After you enable web authentication on a switch, use the ip access-group in and ip admission web-rule interface configuration commands to enable web authentication on a specific interface.
Examples
This example shows how to configure only web authentication on a switch port:
Switch# configure terminal Switch(config) ip admission name http-rule proxy http Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# ip access-group 101 in Switch(config-if)# ip admission rule Switch(config-if)# end
This example shows how to configure IEEE 802.1x authentication with web authentication as a fallback mechanism on a switch port:
Switch# configure terminal Switch(config)# ip admission name rule2 proxy http Switch(config)# fallback profile profile1 Switch(config)# ip access group 101 in Switch(config)# ip admission name rule2 Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# dot1x port-control auto Switch(config-if)# dot1x fallback profile1 Switch(config-if)# end
Related Commands
|
Command |
Description |
|---|---|
|
dot1x fallback |
Configures a port to use web authentication as a fallback method for clients that do not support IEEE 802.1x authentication. |
|
fallback profile |
Creates a web authentication fallback profile. |
|
ip admission |
Enables web authentication on a port. |
|
show authentication sessions interface interface detail |
Displays information about the web authentication session status. |
|
show ip admission |
Displays information about NAC cached entries or the NAC configuration. |
ip device tracking maximum
To configure IP device tracking parameters on a Layer 2 access port, use the ip device tracking maximum command in interface configuration mode. To remove the maximum value, use the no form of the command.
ip device tracking maximum number
no ip device tracking maximum
Syntax Description
|
number |
Number of bindings created in the IP device tracking table for a port. The range is 0 (disabled) to 65535. |
Command Default
None
Command Modes
Interface configuration mode
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
To remove the maximum value, use the no ip device tracking maximum command.
To disable IP device tracking, use the ip device tracking maximum 0 command.
Examples
This example shows how to configure IP device tracking parameters on a Layer 2 access port:
Switch# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch(config)# ip device tracking Switch(config)# interface gigabitethernet1/0/3 Switch(config-if)# switchport mode access Switch(config-if)# switchport access vlan 1 Switch(config-if)# ip device tracking maximum 5 Switch(config-if)# switchport port-security Switch(config-if)# switchport port-security maximum 5 Switch(config-if)# end
ip device tracking probe
To configure the IP device tracking table for Address Resolution Protocol (ARP) probes, use the ip device tracking probe command in global configuration mode. To disable ARP probes, use the no form of this command.
ip device tracking probe { count number | delay seconds | interval seconds | use-svi address }
no ip device tracking probe { count number | delay seconds | interval seconds | use-svi address }
Syntax Description
|
count number |
Sets the number of times that the switch sends the ARP probe. The range is from 1 to 255. |
|
delay seconds |
Sets the number of seconds that the switch waits before sending the ARP probe. The range is from 1 to 120. |
|
interval seconds |
Sets the number of seconds that the switch waits for a response before resending the ARP probe. The range is from 30 to 1814400 seconds. |
|
use-svi |
Uses the switch virtual interface (SVI) IP address as source of ARP probes. |
Command Default
The count number is 3.
There is no delay.
The interval is 30 seconds.
The ARP probe default source IP address is the Layer 3 interface and 0.0.0.0 for switchports.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use the use-svi keyword to configure the IP device tracking table to use the SVI IP address for ARP probes in cases when the default source IP address 0.0.0.0 for switch ports is used and the ARP probes drop.
Examples
This example shows how to set SVI as the source for ARP probes:
Switch(config)# ip device tracking probe use-svi
ip dhcp snooping database
To configure the Dynamic Host Configuration Protocol (DHCP)-snooping database, use the ip dhcp snooping database command in global configuration mode. To disable the DHCP-snooping database, use the no form of this command.
no ip dhcp snooping database [ timeout | write-delay ]
Syntax Description
| flash:url |
Specifies the database URL for storing entries using flash. |
| ftp:url |
Specifies the database URL for storing entries using FTP. |
| http:url |
Specifies the database URL for storing entries using HTTP. |
| https:url |
Specifies the database URL for storing entries using secure HTTP (https). |
| rcp:url |
Specifies the database URL for storing entries using remote copy (rcp). |
| scp:url |
Specifies the database URL for storing entries using Secure Copy (SCP). |
| tftp:url |
Specifies the database URL for storing entries using TFTP. |
| timeout seconds |
Specifies the abort timeout interval; valid values are from 0 to 86400 seconds. |
| write-delay seconds |
Specifies the amount of time before writing the DHCP-snooping entries to an external server after a change is seen in the local DHCP-snooping database; valid values are from 15 to 86400 seconds. |
Command Default
The DHCP-snooping database is not configured.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You must enable DHCP snooping on the interface before entering this command. Use the ip dhcp snooping command to enable DHCP snooping.
Examples
This example shows how to specify the database URL using TFTP:
Switch(config)# ip dhcp snooping database tftp://10.90.90.90/snooping-rp2
This example shows how to specify the amount of time before writing DHCP snooping entries to an external server:
Switch(config)# ip dhcp snooping database write-delay 15
ip dhcp snooping information option format remote-id
To configure the option-82 remote-ID suboption, use the ip dhcp snooping information option format remote-id command in global configuration mode on the switch to configure the option-82 remote-ID suboption. To configure the default remote-ID suboption, use the no form of this command.
ip dhcp snooping information option format remote-id { hostname | string string}
no ip dhcp snooping information option format remote-id { hostname | string string}
Syntax Description
| hostname |
Specify the switch hostname as the remote ID. |
| string string |
Specify a remote ID, using from 1 to 63 ASCII characters (no spaces). |
Command Default
The switch MAC address is the remote ID.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You must globally enable DHCP snooping by using the ip dhcp snooping global configuration command for any DHCP snooping configuration to take effect.
When the option-82 feature is enabled, the default remote-ID suboption is the switch MAC address. This command allows you to configure either the switch hostname or a string of up to 63 ASCII characters (but no spaces) to be the remote ID.
Note | If the hostname exceeds 63 characters, it will be truncated to 63 characters in the remote-ID configuration. |
Examples
This example shows how to configure the option- 82 remote-ID suboption:
Switch(config)# ip dhcp snooping information option format remote-id hostname
ip dhcp snooping verify no-relay-agent-address
To disable the DHCP snooping feature from verifying that the relay agent address (giaddr) in a DHCP client message matches the client hardware address on an untrusted port, use the ip dhcp snooping verify no-relay-agent-address command in global configuration mode. To enable verification, use the no form of this command.
ip dhcp snooping verify no-relay-agent-address
no ip dhcp snooping verify no-relay-agent-address
Syntax Description
This command has no arguments or keywords.
Command Default
The DHCP snooping feature verifies that the relay-agent IP address (giaddr) field in DHCP client message on an untrusted port is 0.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
By default, the DHCP snooping feature verifies that the relay-agent IP address (giaddr) field in DHCP client message on an untrusted port is 0; the message is dropped if the giaddr field is not 0. Use the ip dhcp snooping verify no-relay-agent-address command to disable the verification. Use the no ip dhcp snooping verify no-relay-agent-address to reenable verification.
Examples
This example shows how to enable verification of the giaddr in a DHCP client message:
Switch(config)# no ip dhcp snooping verify no-relay-agent-address
ip source binding
To add a static IP source binding entry, use the ip source binding command. Use the no form of this command to delete a static IP source binding entry
ip source binding mac-address vlan vlan-id ip-address interface interface-id
no ip source binding mac-address vlan vlan-id ip-address interface interface-id
Syntax Description
| mac-address |
Binding MAC address. |
| vlan vlan-id |
Specifies the Layer 2 VLAN identification; valid values are from 1 to 4094. |
| ip-address |
Binding IP address. |
| interface interface-id |
ID of the physical interface. |
Command Default
No IP source bindings are configured.
Command Modes
Global configuration.
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You can use this command to add a static IP source binding entry only.
The no format deletes the corresponding IP source binding entry. It requires the exact match of all required parameter in order for the deletion to be successful. Note that each static IP binding entry is keyed by a MAC address and a VLAN number. If the command contains the existing MAC address and VLAN number, the existing binding entry is updated with the new parameters instead of creating a separate binding entry.
Examples
This example shows how to add a static IP source binding entry:
Switch# configure terminal Switchconfig) ip source binding 0100.0230.0002 vlan 11 10.0.0.4 interface gigabitethernet1/0/1
ip verify source
To enable IP source guard on an interface, use the ip verify source command in interface configuration mode. To disable IP source guard, use the no form of this command.
ip verify source [ port-security] [ smartlog]
no ip verify source
Syntax Description
|
port-security |
(Optional) Enables IP source guard with IP and MAC address filtering. If you do not enter the port-security keyword, IP source guard with IP address filtering is enabled. |
|
smartlog |
(Optional) Enables IP source guard smart logging for the interface. |
Command Default
IP source guard is disabled.
Command Modes
Interface configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
To enable IP source guard with source IP address filtering, use the ip verify source interface configuration command.
To enable IP source guard with source IP and MAC address filtering, use the ip verify source port-security interface configuration command.
When you enable IP source guard smart log on an interface, the contents of the denied packet are sent to a Flexible NetFlow collector.
Examples
This example shows how to enable IP source guard with source IP address filtering on an interface:
Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# ip verify source
This example shows how to enable IP source guard with source IP and MAC address filtering:
Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# ip verify source port-security
This example shows how to enable IP source guard smart logging for the interface:
Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# ip verify source smartlog
You can verify your settings by entering the show ip verify source privileged EXEC command.
ipv6 snooping policy
To configure an IPv6 snooping policy and enter IPv6 snooping configuration mode, use the ipv6 snooping policy command in global configuration mode. To delete an IPv6 snooping policy, use the no form of this command.
ipv6 snooping policy snooping-policy
no ipv6 snooping policy snooping-policy
Syntax Description
| snooping-policy |
User-defined name of the snooping policy. The policy name can be a symbolic string (such as Engineering) or an integer (such as 0). |
Command Default
An IPv6 snooping policy is not configured.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
- The device-role command specifies the role of the device attached to the port.
- The limit address-count maximum command limits the number of IPv6 addresses allowed to be used on the port.
- The protocol command specifies that addresses should be gleaned with Dynamic Host Configuration Protocol (DHCP) or Neighbor Discovery Protocol (NDP).
- The security-level command specifies the level of security enforced.
- The tracking command overrides the default tracking policy on a port.
- The trusted-port command configures a port to become a trusted port; that is, limited or no verification is performed when messages are received.
Examples
This example shows how to configure an IPv6 snooping policy:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)#
limit address-count
To limit the number of IPv6 addresses allowed to be used on the port, use the limit address-count command in Neighbor Discovery Protocol (NDP) inspection policy configuration mode or IPv6 snooping configuration mode. To return to the default, use the no form of this command.
limit address-count maximum
no limit address-count
Syntax Description
| maximum |
The number of addresses allowed on the port. The range is from 1 to 10000. |
Command Default
The default is no limit.
Command Modes
ND inspection policy configuration
IPv6 snooping configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The limit address-count command limits the number of IPv6 addresses allowed to be used on the port on which the policy is applied. Limiting the number of IPv6 addresses on a port helps limit the binding table size. The range is from 1 to 10000.Examples
This example shows how to define an NDP policy name as policy1, place the switch in NDP inspection policy configuration mode, and limit the number of IPv6 addresses allowed on the port to 25:
Switch(config)# ipv6 nd inspection policy policy1 Switch(config-nd-inspection)# limit address-count 25
This example shows how to define an IPv6 snooping policy name as policy1, place the switch in IPv6 snooping policy configuration mode, and limit the number of IPv6 addresses allowed on the port to 25:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# limit address-count 25
mab request format attribute 32
To enable VLAN ID-based MAC authentication on a switch, use the mab request format attribute 32 vlan access-vlan command in global configuration mode. To return to the default setting, use the no form of this command.
mab request format attribute 32 vlan access-vlan
no mab request format attribute 32 vlan access-vlan
Syntax Description
This command has no arguments or keywords.
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use this command to allow a RADIUS server to authenticate a new user based on the host MAC address and VLAN.
Use this feature on networks with the Microsoft IAS RADIUS server. The Cisco ACS ignores this command.
Examples
This example shows how to enable VLAN-ID based MAC authentication on a switch:
Switch(config)# mab request format attribute 32 vlan access-vlan
Related Commands
match (access-map configuration)
To set the VLAN map to match packets against one or more access lists, use the match command in access-map configuration mode on the switch stack or on a standalone switch. To remove the match parameters, use the no form of this command.
match { ip address { name | number } [ name | number ] [ name | number ] ... | mac address { name } [ name ] [ name ] ... }
no match { ip address { name | number } [ name | number ] [ name | number ] ... | mac address { name } [ name ] [ name ] ... }
Syntax Description
| ip address |
Sets the access map to match packets against an IP address access list. |
| mac address |
Sets the access map to match packets against a MAC address access list. |
| name |
Name of the access list to match packets against. |
| number |
Number of the access list to match packets against. This option is not valid for MAC access lists. |
Command Default
The default action is to have no match parameters applied to a VLAN map.
Command Modes
Access-map configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
You enter access-map configuration mode by using the vlan access-map global configuration command.
You must enter one access list name or number; others are optional. You can match packets against one or more access lists. Matching any of the lists counts as a match of the entry.
In access-map configuration mode, use the match command to define the match conditions for a VLAN map applied to a VLAN. Use the action command to set the action that occurs when the packet matches the conditions.
Packets are matched only against access lists of the same protocol type; IP packets are matched against IP access lists, and all other packets are matched against MAC access lists.
Both IP and MAC addresses can be specified for the same map entry.
Examples
This example shows how to define and apply a VLAN access map vmap4 to VLANs 5 and 6 that will cause the interface to drop an IP packet if the packet matches the conditions defined in access list al2:
Switch(config)# vlan access-map vmap4 Switch(config-access-map)# match ip address al2 Switch(config-access-map)# action drop Switch(config-access-map)# exit Switch(config)# vlan filter vmap4 vlan-list 5-6
You can verify your settings by entering the show vlan access-map privileged EXEC command.
no authentication logging verbose
To filter detailed information from authentication system messages, use the no authentication logging verbose command in global configuration mode on the switch stack or on a standalone switch.
no authentication logging verbose
Syntax Description
This command has no arguments or keywords.
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
This command filters details, such as anticipated success, from authentication system messages. Failure messages are not filtered.
Examples
To filter verbose authentication system messages:
Switch(config)# no authentication logging verbose
You can verify your settings by entering the show running-config privileged EXEC command.
Related Commands
|
Filters details from MAC authentication bypass (MAB) system messages. |
no dot1x logging verbose
To filter detailed information from 802.1x system messages, use the no dot1x logging verbose command in global configuration mode on the switch stack or on a standalone switch.
no dot1x logging verbose
Syntax Description
This command has no arguments or keywords.
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
This command filters details, such as anticipated success, from 802.1x system messages. Failure messages are not filtered.
Examples
To filter verbose 802.1x system messages:
Switch(config)# no dot1x logging verbose
You can verify your settings by entering the show running-config privileged EXEC command.
Related Commands
|
Filters details from MAC authentication bypass (MAB) system messages. |
no mab logging verbose
To filter detailed information from MAC authentication bypass (MAB) system messages, use the no mab logging verbose command in global configuration mode on the switch stack or on a standalone switch.
no mab logging verbose
Syntax Description
This command has no arguments or keywords.
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
This command filters details, such as anticipated success, from MAC authentication bypass (MAB) system messages. Failure messages are not filtered.
Examples
To filter verbose MAB system messages:
Switch(config)# no mab logging verbose
You can verify your settings by entering the show running-config privileged EXEC command.
Related Commands
|
Filters details from MAC authentication bypass (MAB) system messages. |
permit (MAC access-list configuration)
To allow non-IP traffic to be forwarded if the conditions are matched, use the permit MAC access-list configuration command on the switch stack or on a standalone switch. To remove a permit condition from the extended MAC access list, use the no form of this command.
{ permit { any | host src-MAC-addr | src-MAC-addr mask} { any | host dst-MAC-addr | dst-MAC-addr mask} [ type mask | aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | lsap lsap mask | mop-console | mop-dump | msdos | mumps | netbios | vines-echo | vines-ip | xns-idp] [ cos cos]
nopermit { any | host src-MAC-addr | src-MAC-addr mask} { any | host dst-MAC-addr | dst-MAC-addr mask} [ type mask | aarp | amber | appletalk | dec-spanning | decnet-iv | diagnostic | dsm | etype-6000 | etype-8042 | lat | lavc-sca | lsap lsap mask | mop-console | mop-dump | msdos | mumps | netbios | vines-echo | vines-ip | xns-idp] [ cos cos]
Syntax Description
Command Default
This command has no defaults. However, the default action for a MAC-named ACL is to deny.
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Though visible in the command-line help strings, appletalk is not supported as a matching condition.
You enter MAC access-list configuration mode by using the mac access-list extended global configuration command.
If you use the host keyword, you cannot enter an address mask; if you do not use the any or host keywords, you must enter an address mask.
After an access control entry (ACE) is added to an access control list, 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.
To filter IPX traffic, you use the type mask or lsap lsap mask keywords, depending on the type of IPX encapsulation being used. Filter criteria for IPX encapsulation types as specified in Novell terminology and Cisco IOS terminology are listed in the following table.
Examples
This example shows how to define the MAC-named extended access list to allow 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 MAC-named extended access list:
Switch(config-ext-macl)# no permit any 00c0.00a0.03fa 0000.0000.0000 netbios
This example permits all packets with EtherType 0x4321:
Switch(config-ext-macl)# permit any any 0x4321 0
You can verify your settings by entering the show access-lists privileged EXEC command.
Related Commands
|
Denies from the MAC access-list configuration. Denies non-IP traffic to be forwarded if conditions are matched. |
|
|
Creates an access list based on MAC addresses for non-IP traffic. |
|
protocol (IPv6 snooping)
To specify that addresses should be gleaned with Dynamic Host Configuration Protocol (DHCP) or Neighbor Discovery Protocol (NDP), or to associate the protocol with an IPv6 prefix list, use the protocol command. To disable address gleaning with DHCP or NDP, use the no form of the command.
protocol { dhcp | ndp}
no protocol { dhcp | ndp}
Syntax Description
| dhcp |
Specifies that addresses should be gleaned in Dynamic Host Configuration Protocol (DHCP) packets. |
| ndp |
Specifies that addresses should be gleaned in Neighbor Discovery Protocol (NDP) packets. |
Command Default
Snooping and recovery are attempted using both DHCP and NDP.
Command Modes
IPv6 snooping configuration mode
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
If an address does not match the prefix list associated with DHCP or NDP, then control packets will be dropped and recovery of the binding table entry will not be attempted with that protocol.
- Using the no protocol {dhcp | ndp} command indicates that a protocol will not be used for snooping or gleaning.
- If the no protocol dhcp command is used, DHCP can still be used for binding table recovery.
- Data glean can recover with DHCP and NDP, though destination guard will only recovery through DHCP.
Examples
This example shows how to define an IPv6 snooping policy name as policy1, place the switch in IPv6 snooping policy configuration mode, and configure the port to use DHCP to glean addresses:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# protocol dhcp
security level (IPv6 snooping)
To specify the level of security enforced, use the security-level command in IPv6 snooping policy configuration mode.
security level { glean | guard | inspect}
Syntax Description
| glean |
Extracts addresses from the messages and installs them into the binding table without performing any verification. |
| guard |
Performs both glean and inspect. Additionally, RA and DHCP server messages are rejected unless they are received on a trusted port or another policy authorizes them. |
| inspect |
Validates messages for consistency and conformance; in particular, address ownership is enforced. Invalid messages are dropped. |
Command Default
The default security level is guard.
Command Modes
IPv6 snooping configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This example shows how to define an IPv6 snooping policy name as policy1, place the device in IPv6 snooping configuration mode, and configure the security level as inspect:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# security-level inspect
show aaa acct-stop-cache
To show accounting session IDs of poisoned sessions, use the show aaa acct-stop-cache command.
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Accounting Stop records for poisoned sessions are cached only on the standby switch.
Examples
This is an example of output from the show aaa acct-stop-cache command:
Switch# show aaa acct-stop-cache
show aaa clients
To show AAA client statistics, use the show aaa clients command.
show aaa clients [ detailed]
Syntax Description
| detailed |
(Optional) Shows detailed AAA client statistics. |
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show aaa clients command:
Switch# show aaa clients
Dropped request packets: 0
show aaa command handler
To show AAA command handler statistics, use the show aaa command handler command.
show aaa command handler
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show aaa command handler command:
Switch# show aaa command handler
AAA Command Handler Statistics:
account-logon: 0, account-logoff: 0
account-query: 0, pod: 0
service-logon: 0, service-logoff: 0
user-profile-push: 0, session-state-log: 0
reauthenticate: 0, bounce-host-port: 0
disable-host-port: 0, update-rbacl: 0
update-sgt: 0, update-cts-policies: 0
invalid commands: 0
async message not sent: 0
show aaa local
To show AAA local method options, use the show aaa local command.
show aaa local { netuser { name | all } | statistics | user lockout}
Syntax Description
| netuser |
Specifies the AAA local network or guest user database. |
| name |
Network user name. |
| all |
Specifies the network and guest user information. |
| statistics |
Displays statistics for local authentication. |
| user lockout |
Specifies the AAA local locked-out user. |
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show aaa local statistics command:
Switch# show aaa local statistics
Local EAP statistics
EAP Method Success Fail
-------------------------------------
Unknown 0 0
EAP-MD5 0 0
EAP-GTC 0 0
LEAP 0 0
PEAP 0 0
EAP-TLS 0 0
EAP-MSCHAPV2 0 0
EAP-FAST 0 0
Requests received from AAA: 0
Responses returned from EAP: 0
Requests dropped (no EAP AVP): 0
Requests dropped (other reasons): 0
Authentication timeouts from EAP: 0
Credential request statistics
Requests sent to backend: 0
Requests failed (unable to send): 0
Authorization results received
Success: 0
Fail: 0
show aaa servers
To shows all AAA servers as seen by the AAA server MIB, use the show aaa servers command.
show aaa servers [ private| public| [ detailed] ]
Syntax Description
| detailed |
(Optional) Displays private AAA servers as seen by the AAA Server MIB. |
| public |
(Optional) Displays public AAA servers as seen by the AAA Server MIB. |
| detailed |
(Optional) Displays detailed AAA server statistics. |
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show aaa servers command:
Switch# show aaa servers
RADIUS: id 1, priority 1, host 172.20.128.2, auth-port 1645, acct-port 1646
State: current UP, duration 9s, previous duration 0s
Dead: total time 0s, count 0
Quarantined: No
Authen: request 0, timeouts 0, failover 0, retransmission 0
Response: accept 0, reject 0, challenge 0
Response: unexpected 0, server error 0, incorrect 0, time 0ms
Transaction: success 0, failure 0
Throttled: transaction 0, timeout 0, failure 0
Author: request 0, timeouts 0, failover 0, retransmission 0
Response: accept 0, reject 0, challenge 0
Response: unexpected 0, server error 0, incorrect 0, time 0ms
Transaction: success 0, failure 0
Throttled: transaction 0, timeout 0, failure 0
Account: request 0, timeouts 0, failover 0, retransmission 0
Request: start 0, interim 0, stop 0
Response: start 0, interim 0, stop 0
Response: unexpected 0, server error 0, incorrect 0, time 0ms
Transaction: success 0, failure 0
Throttled: transaction 0, timeout 0, failure 0
Elapsed time since counters last cleared: 0m
Estimated Outstanding Access Transactions: 0
Estimated Outstanding Accounting Transactions: 0
Estimated Throttled Access Transactions: 0
Estimated Throttled Accounting Transactions: 0
Maximum Throttled Transactions: access 0, accounting 0
show aaa sessions
To show AAA sessions as seen by the AAA Session MIB, use the show aaa sessions command.
show aaa sessions
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show aaa sessions command:
Switch# show aaa sessions
Total sessions since last reload: 7
Session Id: 4007
Unique Id: 4025
User Name: *not available*
IP Address: 0.0.0.0
Idle Time: 0
CT Call Handle: 0
show authentication sessions
To display information about current Auth Manager sessions, use the show authentication sessions command.
show authentication sessions [ database] [ handle handle-id [ details] ] [ interface type number [ details] [ mac mac-address [ interface type number] [ method method-name [ interface type number [ details] [ session-id session-id [ details] ]
Syntax Description
| database |
(Optional) Shows only data stored in session database. |
| handle handle-id |
(Optional) Specifies the particular handle for which Auth Manager information is to be displayed. |
| details |
(Optional) Shows detailed information. |
| interface type number |
(Optional) Specifies a particular interface type and number for which Auth Manager information is to be displayed. |
| mac mac-address |
(Optional) Specifies the particular MAC address for which you want to display information. |
| method method-name |
(Optional) Specifies the particular authentication method for which Auth Manager information is to be displayed. If you specify a method (dot1x, mab, or webauth), you may also specify an interface. |
| session-id session-id |
(Optional) Specifies the particular session for which Auth Manager information is to be displayed. |
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use the show authentication sessions command to display information about all current Auth Manager sessions. To display information about specific Auth Manager sessions, use one or more of the keywords.
|
State |
Description |
|---|---|
|
Not run |
The method has not run for this session. |
|
Running |
The method is running for this session. |
|
Failed over |
The method has failed and the next method is expected to provide a result. |
|
Success |
The method has provided a successful authentication result for the session. |
|
Authc Failed |
The method has provided a failed authentication result for the session. |
|
State |
Description |
|---|---|
|
dot1x |
802.1X |
|
mab |
MAC authentication bypass |
|
webauth |
web authentication |
Examples
The following example shows how to display all authentication sessions on the switch:
Switch# show authentication sessions
Interface MAC Address Method Domain Status Session ID
Gi1/0/48 0015.63b0.f676 dot1x DATA Authz Success 0A3462B1000000102983C05C
Gi1/0/5 000f.23c4.a401 mab DATA Authz Success 0A3462B10000000D24F80B58
Gi1/0/5 0014.bf5d.d26d dot1x DATA Authz Success 0A3462B10000000E29811B94
The following example shows how to display all authentication sessions on an interface:
Switch# show authentication sessions interface gigabitethernet2/0/47
Interface: GigabitEthernet2/0/47
MAC Address: Unknown
IP Address: Unknown
Status: Authz Success
Domain: DATA
Oper host mode: multi-host
Oper control dir: both
Authorized By: Guest Vlan
Vlan Policy: 20
Session timeout: N/A
Idle timeout: N/A
Common Session ID: 0A3462C8000000000002763C
Acct Session ID: 0x00000002
Handle: 0x25000000
Runnable methods list:
Method State
mab Failed over
dot1x Failed over
----------------------------------------
Interface: GigabitEthernet2/0/47
MAC Address: 0005.5e7c.da05
IP Address: Unknown
User-Name: 00055e7cda05
Status: Authz Success
Domain: VOICE
Oper host mode: multi-domain
Oper control dir: both
Authorized By: Authentication Server
Session timeout: N/A
Idle timeout: N/A
Common Session ID: 0A3462C8000000010002A238
Acct Session ID: 0x00000003
Handle: 0x91000001
Runnable methods list:
Method State
mab Authc Success
dot1x Not run
show cisp
To display CISP information for a specified interface, use the show cisp command in privileged EXEC mode.
show cisp {[ clients | interface interface-id] | registrations | summary}
Syntax Description
|
(Optional) Display CISP information about the specified interface. Valid interfaces include physical ports and port channels. |
|
|
registrations |
Displays CISP registrations. |
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This example shows output from the show cisp interface command:
Switch# show cisp interface fast 0 CISP not enabled on specified interface
This example shows output from the show cisp registration command:
Switch# show cisp registrations Interface(s) with CISP registered user(s): ------------------------------------------ Fa1/0/13 Auth Mgr (Authenticator) Gi2/0/1 Auth Mgr (Authenticator) Gi2/0/2 Auth Mgr (Authenticator) Gi2/0/3 Auth Mgr (Authenticator) Gi2/0/5 Auth Mgr (Authenticator) Gi2/0/9 Auth Mgr (Authenticator) Gi2/0/11 Auth Mgr (Authenticator) Gi2/0/13 Auth Mgr (Authenticator) Gi3/0/3 Gi3/0/5 Gi3/0/23
Related Commands
show dot1x
To display IEEE 802.1x statistics, administrative status, and operational status for the switch or for the specified port, use the show dot1x command in user EXEC mode.
show dot1x [ all [ count | details | statistics | summary] ] [ interface type number [ details | statistics] ] [ statistics]
Syntax Description
| all |
(Optional) Displays the IEEE 802.1x information for all interfaces. |
| count |
(Optional) Displays total number of authorized and unauthorized clients. |
| details |
(Optional) Displays the IEEE 802.1x interface details. |
| statistics |
(Optional) Displays the IEEE 802.1x statistics for all interfaces. |
| summary |
(Optional) Displays the IEEE 802.1x summary for all interfaces. |
| interface type number |
(Optional) Displays the IEEE 802.1x status for the specified port. |
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show dot1x all command:
Switch# show dot1x all
Sysauthcontrol Enabled
Dot1x Protocol Version 3
This is an example of output from the show dot1x all count command:
Switch# show dot1x all count
Number of Dot1x sessions
-------------------------------
Authorized Clients = 0
UnAuthorized Clients = 0
Total No of Client = 0
This is an example of output from the show dot1x all statistics command:
Switch# show dot1x statistics
Dot1x Global Statistics for
--------------------------------------------
RxStart = 0 RxLogoff = 0 RxResp = 0 RxRespID = 0
RxReq = 0 RxInvalid = 0 RxLenErr = 0
RxTotal = 0
TxStart = 0 TxLogoff = 0 TxResp = 0
TxReq = 0 ReTxReq = 0 ReTxReqFail = 0
TxReqID = 0 ReTxReqID = 0 ReTxReqIDFail = 0
TxTotal = 0
show eap pac peer
To display stored Protected Access Credentials (PAC) for Extensible Authentication Protocol (EAP) Flexible Authentication via Secure Tunneling (FAST) peers, use the show eap pac peer command in privileged EXEC mode.
show eap pac peer
Syntax Description
This command has no arguments or keywords.
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show eap pac peers privileged EXEC command:
Switch> show eap pac peers No PACs stored
Related Commands
|
Clears EAP session information for the switch or for the specified port. |
show ip dhcp snooping statistics
To display DHCP snooping statistics in summary or detail form, use the show ip dhcp snooping statistics command in user EXEC mode.
show ip dhcp snooping statistics [ detail ]
Syntax Description
| detail |
(Optional) Displays detailed statistics information. |
Command Modes
User EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
In a switch stack, all statistics are generated on the stack master. If a new active switch is elected, the statistics counters reset.
Examples
This is an example of output from the show ip dhcp snooping statistics command:
Switch> show ip dhcp snooping statistics
Packets Forwarded = 0
Packets Dropped = 0
Packets Dropped From untrusted ports = 0
This is an example of output from the show ip dhcp snooping statistics detail command:
Switch> show ip dhcp snooping statistics detail
Packets Processed by DHCP Snooping = 0
Packets Dropped Because
IDB not known = 0
Queue full = 0
Interface is in errdisabled = 0
Rate limit exceeded = 0
Received on untrusted ports = 0
Nonzero giaddr = 0
Source mac not equal to chaddr = 0
Binding mismatch = 0
Insertion of opt82 fail = 0
Interface Down = 0
Unknown output interface = 0
Reply output port equal to input port = 0
Packet denied by platform = 0
|
DHCP Snooping Statistic |
Description |
|---|---|
|
Packets Processed by DHCP Snooping |
Total number of packets handled by DHCP snooping, including forwarded and dropped packets. |
|
Packets Dropped Because IDB not known |
Number of errors when the input interface of the packet cannot be determined. |
|
Queue full |
Number of errors when an internal queue used to process the packets is full. This might happen if DHCP packets are received at an excessively high rate and rate limiting is not enabled on the ingress ports. |
|
Interface is in errdisabled |
Number of times a packet was received on a port that has been marked as error disabled. This might happen if packets are in the processing queue when a port is put into the error-disabled state and those packets are subsequently processed. |
|
Rate limit exceeded |
Number of times the rate limit configured on the port was exceeded and the interface was put into the error-disabled state. |
|
Received on untrusted ports |
Number of times a DHCP server packet (OFFER, ACK, NAK, or LEASEQUERY) was received on an untrusted port and was dropped. |
|
Nonzero giaddr |
Number of times the relay agent address field (giaddr) in the DHCP packet received on an untrusted port was not zero, or the no ip dhcp snooping information option allow-untrusted global configuration command is not configured and a packet received on an untrusted port contained option-82 data. |
|
Source mac not equal to chaddr |
Number of times the client MAC address field of the DHCP packet (chaddr) does not match the packet source MAC address and the ip dhcp snooping verify mac-address global configuration command is configured. |
|
Binding mismatch |
Number of times a RELEASE or DECLINE packet was received on a port that is different than the port in the binding for that MAC address-VLAN pair. This indicates someone might be trying to spoof the real client, or it could mean that the client has moved to another port on the switch and issued a RELEASE or DECLINE. The MAC address is taken from the chaddr field of the DHCP packet, not the source MAC address in the Ethernet header. |
|
Insertion of opt82 fail |
Number of times the option-82 insertion into a packet failed. The insertion might fail if the packet with the option-82 data exceeds the size of a single physical packet on the internet. |
|
Interface Down |
Number of times the packet is a reply to the DHCP relay agent, but the SVI interface for the relay agent is down. This is an unlikely error that occurs if the SVI goes down between sending the client request to the DHCP server and receiving the response. |
|
Unknown output interface |
Number of times the output interface for a DHCP reply packet cannot be determined by either option-82 data or a lookup in the MAC address table. The packet is dropped. This can happen if option 82 is not used and the client MAC address has aged out. If IPSG is enabled with the port-security option and option 82 is not enabled, the MAC address of the client is not learned, and the reply packets will be dropped. |
|
Reply output port equal to input port |
Number of times the output port for a DHCP reply packet is the same as the input port, causing a possible loop. Indicates a possible network misconfiguration or misuse of trust settings on ports. |
|
Packet denied by platform |
Number of times the packet has been denied by a platform-specific registry. |
show radius server-group
To display properties for the RADIUS server group, use the show radius server-group command.
show radius server-group { name | all}
Syntax Description
| name |
Name of the server group. The character string used to name the group of servers must be defined using the aaa group server radius command. |
| all |
Displays properties for all of the server groups. |
Command Modes
User EXEC
Privileged EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
Use the show radius server-group command to display the server groups that you defined by using the aaa group server radius command.
Examples
This is an example of output from the show radius server-group all command:
Switch# show radius server-group all
Server group radius
Sharecount = 1 sg_unconfigured = FALSE
Type = standard Memlocks = 1
|
Field |
Description |
|---|---|
|
Server group |
Name of the server group. |
|
Sharecount |
Number of method lists that are sharing this server group. For example, if one method list uses a particular server group, the sharecount would be 1. If two method lists use the same server group, the sharecount would be 2. |
|
sg_unconfigured |
Server group has been unconfigured. |
|
Type |
The type can be either standard or nonstandard. The type indicates whether the servers in the group accept nonstandard attributes. If all servers within the group are configured with the nonstandard option, the type will be shown as "nonstandard". |
|
Memlocks |
An internal reference count for the server-group structure that is in memory. The number represents how many internal data structure packets or transactions are holding references to this server group. Memlocks is used internally for memory management purposes. |
show vlan access-map
To display information about a particular VLAN access map or for all VLAN access maps, use the show vlan access-map command in privileged EXEC mode.
show vlan access-map [ map-name ]
Syntax Description
| map-name |
(Optional) Name of a specific VLAN access map. |
Command Default
None
Command Modes
Privileged EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Examples
This is an example of output from the show vlan access-map command:
Switch# show vlan access-map
Vlan access-map "vmap4" 10
Match clauses:
ip address: al2
Action:
forward
Vlan access-map "vmap4" 20
Match clauses:
ip address: al2
Action:
forward
show vlan group
To display the VLANs that are mapped to VLAN groups, use the show vlan group command in privileged EXEC mode.
show vlan group [ group-name vlan-group-name [user_count] ]
Syntax Description
| group-name vlan-group-name |
(Optional) Displays the VLANs mapped to the specified VLAN group. |
| user_count |
(Optional) Displays the number of users in each VLAN mapped to a specified VLAN group. |
Command Default
None
Command Modes
Privileged EXEC
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The show vlan group command displays the existing VLAN groups and lists the VLANs and VLAN ranges that are members of each VLAN group. If you enter the group-name keyword, only the members of the specified VLAN group are displayed.
Examples
This example shows how to display the members of a specified VLAN group:
switchport port-security aging
To set the aging time and type for secure address entries or to change the aging behavior for secure addresses on a particular port, use the switchport port-security aging command in interface configuration mode. To disable port security aging or to set the parameters to their default states, use the no form of this command.
switchport port-security aging { static | time time | type { absolute | inactivity } }
no switchport port-security aging { static | time | type }
Syntax Description
|
static |
Enables aging for statically configured secure addresses on this port. |
|
time time |
Specifies the aging time for this port. The range is 0 to 1440 minutes. If the time is 0, aging is disabled for this port. |
|
type |
Sets the aging type. |
|
absolute |
Sets absolute aging type. All the secure addresses on this port age out exactly after the time (minutes) specified and are removed from the secure address list. |
|
inactivity |
Sets the inactivity aging type. The secure addresses on this port age out only if there is no data traffic from the secure source address for the specified time period. |
Command Default
The port security aging feature is disabled. The default time is 0 minutes.
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
To enable secure address aging for a particular port, set the aging time to a value other than 0 for that port.
To allow limited time access to particular secure addresses, set the aging type as absolute. When the aging time lapses, the secure addresses are deleted.
To allow continuous access to a limited number of secure addresses, set the aging type as inactivity. This removes the secure address when it become inactive, and other addresses can become secure.
To allow unlimited access to a secure address, configure it as a secure address, and disable aging for the statically configured secure address by using the no switchport port-security aging static interface configuration command.
Examples
This example sets the aging time as 2 hours for absolute aging for all the secure addresses on the port:
Switch(config)# interface gigabitethernet1/0/1 Switch(config-if)# switchport port-security aging time 120
This example sets the aging time as 2 minutes for inactivity aging type with aging enabled for configured secure addresses on the port:
Switch(config)# interface gigabitethernet1/0/2 Switch(config-if)# switchport port-security aging time 2 Switch(config-if)# switchport port-security aging type inactivity Switch(config-if)# switchport port-security aging static
This example shows how to disable aging for configured secure addresses:
Switch(config)# interface gigabitethernet1/0/2 Switch(config-if)# no switchport port-security aging static
switchport port-security mac-address
To configure secure MAC addresses or sticky MAC address learning, use the switchport port-security mac-address interface configuration command. To return to the default setting, use the no form of this command.
switchport port-security mac-address { mac-address [ vlan { vlan-id { access | voice } } ] | sticky [ mac-address | vlan { vlan-id { access | voice } } ] }
no switchport port-security mac-address { mac-address [ vlan { vlan-id { access | voice } } ] | sticky [ mac-address | vlan { vlan-id { access | voice } } ] }
Syntax Description
|
mac-address |
A secure MAC address for the interface by entering a 48-bit MAC address. You can add additional secure MAC addresses up to the maximum value configured. |
||
|
vlan vlan-id |
(Optional) On a trunk port only, specifies the VLAN ID and the MAC address. If no VLAN ID is specified, the native VLAN is used. |
||
|
vlan access |
(Optional) On an access port only, specifies the VLAN as an access VLAN. |
||
|
vlan voice |
(Optional) On an access port only, specifies the VLAN as a voice VLAN.
|
||
|
sticky |
Enables the interface for sticky learning. When sticky learning is enabled, the interface adds all secure MAC addresses that are dynamically learned to the running configuration and converts these addresses to sticky secure MAC addresses. |
||
|
mac-address |
(Optional) A MAC address to specify a sticky secure MAC address. |
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
A secure port has the following limitations:
- A secure port can be an access port or a trunk port; it cannot be a dynamic access port.
- A secure port cannot be a routed port.
- A secure port cannot be a protected port.
- A secure port cannot be a destination port for Switched Port Analyzer (SPAN).
- A secure port cannot belong to a Gigabit or 10-Gigabit EtherChannel port group.
- You cannot configure static secure or sticky secure MAC addresses in the voice VLAN.
- When you enable port security on an interface that is also configured with a voice VLAN, set the maximum allowed secure addresses on the port to two. When the port is connected to a Cisco IP phone, the IP phone requires one MAC address. The Cisco IP phone address is learned on the voice VLAN, but is not learned on the access VLAN. If you connect a single PC to the Cisco IP phone, no additional MAC addresses are required. If you connect more than one PC to the Cisco IP phone, you must configure enough secure addresses to allow one for each PC and one for the Cisco IP phone.
- Voice VLAN is supported only on access ports and not on trunk ports.
Sticky secure MAC addresses have these characteristics:
- When you enable sticky learning on an interface by using the switchport port-security mac-address sticky interface configuration command, the interface converts all the dynamic secure MAC addresses, including those that were dynamically learned before sticky learning was enabled, to sticky secure MAC addresses and adds all sticky secure MAC addresses to the running configuration.
- If you disable sticky learning by using the no switchport port-security mac-address sticky interface configuration command or the running configuration is removed, the sticky secure MAC addresses remain part of the running configuration but are removed from the address table. The addresses that were removed can be dynamically reconfigured and added to the address table as dynamic addresses.
- When you configure sticky secure MAC addresses by using the switchport port-security mac-address sticky mac-address interface configuration command, these addresses are added to the address table and the running configuration. If port security is disabled, the sticky secure MAC addresses remain in the running configuration.
- If you save the sticky secure MAC addresses in the configuration file, when the switch restarts or the interface shuts down, the interface does not need to relearn these addresses. If you do not save the sticky secure addresses, they are lost. If sticky learning is disabled, the sticky secure MAC addresses are converted to dynamic secure addresses and are removed from the running configuration.
- If you disable sticky learning and enter the switchport port-security mac-address sticky mac-address interface configuration command, an error message appears, and the sticky secure MAC address is not added to the running configuration.
You can verify your settings by using the show port-security privileged EXEC command.
Examples
This example shows how to configure a secure MAC address and a VLAN ID on a port:
Switch(config)# interface gigabitethernet 2/0/2 Switch(config-if)# switchport mode trunk Switch(config-if)# switchport port-security Switch(config-if)# switchport port-security mac-address 1000.2000.3000 vlan 3
This example shows how to enable sticky learning and to enter two sticky secure MAC addresses on a port:
Switch(config)# interface gigabitethernet 2/0/2 Switch(config-if)# switchport port-security mac-address sticky Switch(config-if)# switchport port-security mac-address sticky 0000.0000.4141 Switch(config-if)# switchport port-security mac-address sticky 0000.0000.000f
switchport port-security maximum
To configure the maximum number of secure MAC addresses, use the switchport port-security maximum command in interface configuration mode. To return to the default settings, use the no form of this command.
switchport port-security maximum value [ vlan [ vlan-list | [ access | voice ] ] ]
no switchport port-security maximum value [ vlan [ vlan-list | [ access | voice ] ] ]
Syntax Description
|
value |
Sets the maximum number of secure MAC addresses for the interface. The default setting is 1. |
||
|
vlan |
(Optional) For trunk ports, sets the maximum number of secure MAC addresses on a VLAN or range of VLANs. If the vlan keyword is not entered, the default value is used. |
||
|
vlan-list |
(Optional) Range of VLANs separated by a hyphen or a series of VLANs separated by commas. For nonspecified VLANs, the per-VLAN maximum value is used. |
||
|
access |
(Optional) On an access port only, specifies the VLAN as an access VLAN. |
||
|
voice |
(Optional) On an access port only, specifies the VLAN as a voice VLAN.
|
Command Default
When port security is enabled and no keywords are entered, the default maximum number of secure MAC addresses is 1.
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The maximum number of secure MAC addresses that you can configure on a switch or switch stack is set by the maximum number of available MAC addresses allowed in the system. This number is determined by the active Switch Database Management (SDM) template. See the sdm prefer command. This number represents the total of available MAC addresses, including those used for other Layer 2 functions and any other secure MAC addresses configured on interfaces.
A secure port has the following limitations:
- A secure port can be an access port or a trunk port.
- A secure port cannot be a routed port.
- A secure port cannot be a protected port.
- A secure port cannot be a destination port for Switched Port Analyzer (SPAN).
- A secure port cannot belong to a Gigabit or 10-Gigabit EtherChannel port group.
- When you enable port security on an interface that is also configured with a voice VLAN, set the maximum allowed secure addresses on the port to two. When the port is connected to a Cisco IP phone, the IP phone requires one MAC address. The Cisco IP phone address is learned on the voice VLAN, but is not learned on the access VLAN. If you connect a single PC to the Cisco IP phone, no additional MAC addresses are required. If you connect more than one PC to the Cisco IP phone, you must configure enough secure addresses to allow one for each PC and one for the Cisco IP phone. Voice VLAN is supported only on access ports and not on trunk ports.
- When you enter a maximum secure address value for an interface, if the new value is greater than the previous value, the new value overrides the previously configured value. If the new value is less than the previous value and the number of configured secure addresses on the interface exceeds the new value, the command is rejected. Setting a maximum number of addresses to one and configuring the MAC address of an attached device ensures that the device has the full bandwidth of the port.
When you enter a maximum secure address value for an interface, this occurs:
- If the new value is greater than the previous value, the new value overrides the previously configured value.
- If the new value is less than the previous value and the number of configured secure addresses on the interface exceeds the new value, the command is rejected.
You can verify your settings by using the show port-security privileged EXEC command.
Examples
This example shows how to enable port security on a port and to set the maximum number of secure addresses to 5. The violation mode is the default, and no secure MAC addresses are configured.
Switch(config)# interface gigabitethernet 2/0/2 Switch(config-if)# switchport mode access Switch(config-if)# switchport port-security Switch(config-if)# switchport port-security maximum 5
switchport port-security violation
To configure secure MAC address violation mode or the action to be taken if port security is violated, use the switchport port-security violation command in interface configuration mode. To return to the default settings, use the no form of this command.
switchport port-security violation { protect | restrict | shutdown | shutdown vlan }
no switchport port-security violation { protect | restrict | shutdown | shutdown vlan }
Syntax Description
|
protect |
Sets the security violation protect mode. |
|
restrict |
Sets the security violation restrict mode. |
|
shutdown |
Sets the security violation shutdown mode. |
|
shutdown vlan |
Sets the security violation mode to per-VLAN shutdown. |
Command Default
Command Modes
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
In the security violation protect mode, when the number of port secure MAC addresses reaches the maximum limit allowed on the port, packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses to drop below the maximum value or increase the number of maximum allowable addresses. You are not notified that a security violation has occurred.
Note | We do not recommend configuring the protect mode on a trunk port. The protect mode disables learning when any VLAN reaches its maximum limit, even if the port has not reached its maximum limit. |
In the security violation restrict mode, when the number of secure MAC addresses reaches the limit allowed on the port, packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses or increase the number of maximum allowable addresses. An SNMP trap is sent, a syslog message is logged, and the violation counter increments.
In the security violation shutdown mode, the interface is error-disabled when a violation occurs and the port LED turns off. An SNMP trap is sent, a syslog message is logged, and the violation counter increments. When a secure port is in the error-disabled state, you can bring it out of this state by entering the errdisable recovery cause psecure-violation global configuration command, or you can manually re-enable it by entering the shutdown and no shutdown interface configuration commands.
When the security violation mode is set to per-VLAN shutdown, only the VLAN on which the violation occurred is error-disabled.
A secure port has the following limitations:
- A secure port can be an access port or a trunk port.
- A secure port cannot be a routed port.
- A secure port cannot be a protected port.
- A secure port cannot be a destination port for Switched Port Analyzer (SPAN).
- A secure port cannot belong to a Gigabit or 10-Gigabit EtherChannel port group. A security violation occurs when the maximum number of secure MAC addresses are in the address table and a station whose MAC address is not in the address table attempts to access the interface or when a station whose MAC address is configured as a secure MAC address on another secure port attempts to access the interface. When a secure port is in the error-disabled state, you can bring it out of this state by entering the errdisable recovery cause psecure-violation global configuration command. You can manually re-enable the port by entering the shutdown and no shutdown interface configuration commands or by using the clear errdisable interface privileged EXEC command.
You can verify your settings by using the show port-security privileged EXEC command.
Examples
This example show how to configure a port to shut down only the VLAN if a MAC security violation occurs:
Switch(config)# interface gigabitethernet2/0/2 Switch(config)# switchport port-security violation shutdown vlan
tracking (IPv6 snooping)
To override the default tracking policy on a port, use the tracking command in IPv6 snooping policy configuration mode.
tracking { enable [ reachable-lifetime { value | infinite}] | disable [ stale-lifetime { value | infinite}
Syntax Description
| enable |
Enables tracking. |
| reachable-lifetime |
(Optional) Specifies the maximum amount of time a reachable entry is considered to be directly or indirectly reachable without proof of reachability. |
| value |
Lifetime value, in seconds. The range is from 1 to 86400, and the default is 300. |
| infinite |
Keeps an entry in a reachable or stale state for an infinite amount of time. |
| disable |
Disables tracking. |
| stale-lifetime |
(Optional) Keeps the time entry in a stale state, which overwrites the global stale-lifetime configuration. |
Command Default
The time entry is kept in a reachable state.
Command Modes
IPv6 snooping configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
The tracking command overrides the default tracking policy set by the ipv6 neighbor tracking command on the port on which this policy applies. This function is useful on trusted ports where, for example, you may not want to track entries but want an entry to stay in the binding table to prevent it from being stolen.
The reachable-lifetime keyword is the maximum time an entry will be considered reachable without proof of reachability, either directly through tracking or indirectly through IPv6 snooping. After the reachable-lifetime value is reached, the entry is moved to stale. Use of the reachable-lifetime keyword with the tracking command overrides the global reachable lifetime configured by the ipv6 neighbor binding reachable-lifetime command.
The stale-lifetime keyword is the maximum time an entry is kept in the table before it is deleted or the entry is proven to be reachable, either directly or indirectly. Use of the reachable-lifetime keyword with the tracking command overrides the global stale lifetime configured by the ipv6 neighbor binding stale-lifetime command.
Examples
This example shows how to define an IPv6 snooping policy name as policy1, place the switch in IPv6 snooping policy configuration mode, and configure an entry to stay in the binding table for an infinite length of time on a trusted port:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# tracking disable stale-lifetime infinite
trusted-port
To configure a port to become a trusted port, use the trusted-port command in IPv6 snooping policy mode or ND inspection policy configuration mode. To disable this function, use the no form of this command.
trusted-port
no trusted-port
Syntax Description
Command Default
No ports are trusted.
Command Modes
ND inspection policy configuration
IPv6 snooping configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
When the trusted-port command is enabled, limited or no verification is performed when messages are received on ports that have this policy. However, to protect against address spoofing, messages are analyzed so that the binding information that they carry can be used to maintain the binding table. Bindings discovered from these ports will be considered more trustworthy than bindings received from ports that are not configured to be trusted.
Examples
This example shows how to define an NDP policy name as policy1, place the switch in NDP inspection policy configuration mode, and configure the port to be trusted:
Switch(config)# ipv6 nd inspection policy1 Switch(config-nd-inspection)# trusted-port
This example shows how to define an IPv6 snooping policy name as policy1, place the switch in IPv6 snooping policy configuration mode, and configure the port to be trusted:
Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# trusted-port
vlan access-map
To create or modify a VLAN map entry for VLAN packet filtering, and change the mode to the VLAN access-map configuration, use the vlan access-map command in global configuration mode on the switch stack or on a standalone switch. To delete a VLAN map entry, use the no form of this command.
vlan access-map name [ number ]
no vlan access-map name [ number ]
Note | This command is not supported on switches running the LAN Base feature set. |
Syntax Description
| name |
Name of the VLAN map. |
| number |
(Optional) The sequence number of the map entry that you want to create or modify (0 to 65535). If you are creating a VLAN map and the sequence number is not specified, it is automatically assigned in increments of 10, starting from 10. This number is the sequence to insert to, or delete from, a VLAN access-map entry. |
Command Default
There are no VLAN map entries and no VLAN maps applied to a VLAN.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
In global configuration mode, use this command to create or modify a VLAN map. This entry changes the mode to VLAN access-map configuration, where you can use the match access-map configuration command to specify the access lists for IP or non-IP traffic to match and use the action command to set whether a match causes the packet to be forwarded or dropped.
In VLAN access-map configuration mode, these commands are available:
- action—Sets the action to be taken (forward or drop).
- default—Sets a command to its defaults.
- exit—Exits from VLAN access-map configuration mode.
- match—Sets the values to match (IP address or MAC address).
- no—Negates a command or set its defaults.
When you do not specify an entry number (sequence number), it is added to the end of the map.
There can be only one VLAN map per VLAN and it is applied as packets are received by a VLAN.
You can use the no vlan access-map name [number] command with a sequence number to delete a single entry.
Use the vlan filter interface configuration command to apply a VLAN map to one or more VLANs.
For more information about VLAN map entries, see the software configuration guide for this release.
Examples
This example shows how to create a VLAN map named vac1 and apply matching conditions and actions to it. If no other entries already exist in the map, this will be entry 10.
Switch(config)# vlan access-map vac1 Switch(config-access-map)# match ip address acl1 Switch(config-access-map)# action forward
This example shows how to delete VLAN map vac1:
Switch(config)# no vlan access-map vac1
vlan filter
To apply a VLAN map to one or more VLANs, use the vlan filter command in global configuration mode on the switch stack or on a standalone switch. To remove the map, use the no form of this command.
vlan filter mapname vlan-list { list | all }
no vlan filter mapname vlan-list { list | all }
Note | This command is not supported on switches running the LAN Base feature set. |
Syntax Description
| mapname |
Name of the VLAN map entry. |
| vlan-list |
Specifies which VLANs to apply the map to. |
| list |
The list of one or more VLANs in the form tt, uu-vv, xx, yy-zz, where spaces around commas and dashes are optional. The range is 1 to 4094. |
| all |
Adds the map to all VLANs. |
Command Default
There are no VLAN filters.
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
To avoid accidentally dropping too many packets and disabling connectivity in the middle of the configuration process, we recommend that you completely define the VLAN access map before applying it to a VLAN.
For more information about VLAN map entries, see the software configuration guide for this release.
Examples
This example applies VLAN map entry map1 to VLANs 20 and 30:
Switch(config)# vlan filter map1 vlan-list 20, 30
This example shows how to delete VLAN map entry mac1 from VLAN 20:
Switch(config)# no vlan filter map1 vlan-list 20
You can verify your settings by entering the show vlan filter privileged EXEC command.
vlan group
To create or modify a VLAN group, use the vlan group command in global configuration mode. To remove a VLAN list from the VLAN group, use the no form of this command.
vlan group group-name vlan-list vlan-list
no vlan group group-name vlan-list vlan-list
Syntax Description
| group-name |
Name of the VLAN group. The group name may contain up to 32 characters and must begin with a letter. |
| vlan-list vlan-list |
Specifies one or more VLANs to be added to the VLAN group. The vlan-list argument can be a single VLAN ID, a list of VLAN IDs, or VLAN ID range. Multiple entries are separated by a hyphen (-) or a comma (,). |
Command Default
None
Command Modes
Global configuration
Command History
|
Release |
Modification |
|---|---|
|
Cisco IOS 15.0(2)EX1 |
This command was introduced. |
Usage Guidelines
If the named VLAN group does not exist, the vlan group command creates the group and maps the specified VLAN list to the group. If the named VLAN group exists, the specified VLAN list is mapped to the group.
The no form of the vlan group command removes the specified VLAN list from the VLAN group. When you remove the last VLAN from the VLAN group, the VLAN group is deleted.
A maximum of 100 VLAN groups can be configured, and a maximum of 4094 VLANs can be mapped to a VLAN group.
Examples
This example shows how to map VLANs 7 through 9 and 11 to a VLAN group:
Switch(config)# vlan group group1 vlan-list 7-9,11
This example shows how to remove VLAN 7 from the VLAN group:
Switch(config)# no vlan group group1 vlan-list 7
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