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Cisco IOS Software Releases 12.3 Special and Early Deployments

Multi-Processor Forwarding (MPF) for Broadband LAC

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Table Of Contents

Multi-Processor Forwarding (MPF) for Broadband LAC

Contents

Prerequisites for MPF for Broadband LAC

Restrictions for MPF for Broadband LAC

Information About MPF for Broadband LAC

MPF for Broadband LAC Overview

How to Configure MPF for Broadband LAC

Disabling and Enabling MPF for Broadband LAC

Prerequisites

Verifying MPF for Broadband LAC Is Enabled

Configuration Examples for MPF for Broadband LAC

Example of show version Command

Example of show ip mpf Command

Additional References

Related Documents

Standards

MIBs

IRFCs

Technical Assistance

Command Reference

debug ip mpf

ip mpf

show ip mpf adjacency

show ip mpf fib

show ip mpf interface

show ip mpf lac

show ip mpf statistics

show ip mpf vcci

show version

Glossary


Multi-Processor Forwarding (MPF) for Broadband LAC

The Multi-Processor Forwarding (MPF) for Broadband L2TP Access Concentrator (LAC) feature enables a second CPU on the Cisco 7301 router to use a fast forwarding method of switching data packets in order to improve broadband feature performance.

Release
Modification

12.3(7)XI1

This feature was introduced.


Feature History for MPF for Broadband LAC Feature

Finding Support Information for Platforms and Cisco IOS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Contents

•Prerequisites for MPF for Broadband LAC

•Restrictions for MPF for Broadband LAC

•Information About MPF for Broadband LAC

•How to Configure MPF for Broadband LAC

•Configuration Examples for MPF for Broadband LAC

•Additional References

•Command Reference

•Glossary

Prerequisites for MPF for Broadband LAC

•You must have an upgraded ROM monitor 2.0 (ROMmon) image before you can download the software to enable use of the second CPU.

–Minimum required ROMmon version for the Cisco 7301 is ROMmon version 12.3(4r)T2.

–The upgraded ROMmon 2.0 image is available by default for newly purchased Cisco 7301 routers.

–If you have a ROMmon version earlier than 2.0 and you would like to use the MPF capability, a Cisco-qualified support engineer (SE) can perform the ROMmon 2.0 upgrade on site.

•Cisco Express Forwarding (CEF) is enabled.

•You should have a preferred 512 MB memory for the second CPU.

Restrictions for MPF for Broadband LAC

•MPF for Broadband LAC is only supported on a Cisco 7301 router.

•MPF for Broadband LAC only supports native Gigabit Ethernet (GE) interfaces.

•L2TP access concentrator (LAC) is the only supported broadband feature.

Information About MPF for Broadband LAC

To configure MPF for Broadband LAC, you should read the MPF for Broadband LAC Overview.

MPF for Broadband LAC Overview

MPF for Broadband LAC is a method of improving the performance of broadband features, specifically the Layer 2 Tunneling Protocol (L2TP) access concentrator (LAC), by enabling forwarding on a second CPU on the Cisco 7301 router. The need to improve performance is important due to the rapid increase in broadband users. MPF for Broadband LAC significantly improves performance by three times that of a regular Cisco 7301, without adding a new chassis.

MPF for Broadband LAC is accomplished by the second CPU running Fast Forwarding (FF) software to switch data packets. The FF software is bundled together with the Cisco IOS software image. When the Cisco IOS image is loaded, the second CPU is enabled by default. To disable fast forwarding on the second CPU, use the no ip mpf command. In addition, show ip mpf commands and a debug ip mpf command monitor forwarding on the second CPU and provide statistics.

The MPF for Broadband LAC feature requires the purchase of enabling software for the second CPU. You may purchase the enabling software when you purchase a new Cisco 7301 router, or you may purchase the enabling software as an upgrade. In both cases, the second CPU software is bundled in the Cisco IOS image and turned on by default. Contact your Cisco field representative or sales support team for more information.

Certain Broadband LAC features are handed off to the second CPU to be processed. They include the following supported IP features:

•Longest prefix match forwarding. Note that load balancing and IP Version 6 (IPv6) are not supported.

•Fragmentation. Note that reassembly is not supported.

•Point-to-Point Protocol over Ethernet (PPPoE) tunneling to and from L2TP

•Per PPPoE session accounting

•Per L2TP session accounting

•Per IP Version 4 (IPv4) adjacency accounting

•Per interface accounting

MPF for Broadband LAC supports the following protocols and encapsulations:

Protocols

•L2TP

Encapsulations

•ARPA

•802.1Q

•PPPoE

Features not supported on the second CPU will be redirected and continue to be processed by way of Cisco Express Forwarding (CEF) in the same manner as they are today. Two unsupported features are CEF Accounting and Virtual Private Network (VPN) routing/forwarding (VRF).

The following CEF Accounting and VRF commands will disable the fast forwarding function on a global level:

•ip cef accounting per-prefix

•ip cef accounting prefix-length

•ip cef accounting non-recursive

•ip vrf vrf-name

How to Configure MPF for Broadband LAC

This section contains the following tasks:

•Disabling and Enabling MPF for Broadband LAC (optional)

•Verifying MPF for Broadband LAC Is Enabled (optional)

Disabling and Enabling MPF for Broadband LAC

This section contains the procedure to disable or enable forwarding on the second CPU on a Cisco 7301 router for MPF for Broadband LAC.

Prerequisites

•You have installed the enabling software.

•You must have IP routing turned on before enabling forwarding on the second CPU.

SUMMARY STEPS

1. enable

2. configure terminal

3. no ip mpf

4. end

5. configure terminal

6. ip mpf

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

no ip mpf

Example:

Router(config)# no ip mpf

To disable forwarding on the second CPU.

The second CPU is enabled by default.

Step 4 

end

Example:

Router(config)# end

Exits global configuration mode and returns to privileged EXEC mode.

Step 5 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 6 

ip mpf

Example:

Router(config)# ip mpf

If you have disabled forwarding on the second CPU for MPF for Broadband LAC, this command re-enables forwarding on the second CPU.

Verifying MPF for Broadband LAC Is Enabled

Perform this optional task to verify that MPF for Broadband LAC is enabled or turned on for the second CPU.

SUMMARY STEPS

1. enable

2. show version

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

Router# show version

Example:

Router# show version

Displays information about the currently loaded software version along with hardware and device information, including information about whether the second CPU (CPU 1) is enabled for MPF for Broadband LAC.

Configuration Examples for MPF for Broadband LAC

This section contains the following examples:

•Example of show version Command

•Example of show ip mpf Command

Example of show version Command

The following show version command example displays the second CPU (CPU 1) enabled for MPF for Broadband LAC. 

Router# show version


Cisco IOS Software, 7301 Software (C7301-I12S-M), Experimental Version 
12.3(20040524:050554) [REL-v123_7_xi_throttle.ios-weekly 114]

Copyright (c) 1986-2004 by Cisco Systems, Inc.

Compiled Mon 24-May-04 06:26 by userid


ROM:System Bootstrap, Version 12.3(4r)T2, RELEASE SOFTWARE (fc1)

BOOTLDR:Cisco IOS Software, 7301 Software (C7301-BOOT-M), Experimental Version 
12.3(20040514:051116) [userid-v123_7_xi_throttle-ios-nightly-task 117]


Router uptime is 1 hour, 50 minutes

System returned to ROM by reload at 18:05:37 UTC Wed Mar 22 2004

System image file is "disk0:c7301-i12s-mz"


Cisco 7301 (NPE) processor (revision C) with 229376K/32768K bytes of memory.

Processor board ID 74806813

SB-1 CPU at 700MHz, Implementation 1, Rev 0.2, 512KB L2 Cache

1 slot midplane, Version 3.0


Last reset from watchdog nmi

CPU 1 Multi-Processor Forwarding, Fri May 21 14:21:57 2004 [dailybuil 119]

1 FastEthernet interface

3 GigabitEthernet interfaces

509K bytes of NVRAM.


62976K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).

32768K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x0

Example of show ip mpf Command

The following examples display MPF for Broadband LAC information using the show ip mpf command. For more information on the examples, refer to the commands in the Command Reference. 

Router# show ip mpf ?


 adjacency   Adjacency information

 fib         Forwarding information base

 interface   Interface related information

 lac         LAC information

 statistics  Protocol statistics

 vcci        VCCI allocation


Router# show ip mpf interface ?


 GigabitEthernet  GigabitEthernet IEEE 802.3z

 statistics       Interface counters

subblock         Interface subblock information


Router# show ip mpf interface subblock


 MPF is enabled

 CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/1        Y  Y   -- 0     2     ARPA   4096 646FC928 64368908 649BB290

 Gi0/2        Y  Y   -- 1     3     ARPA   4096 646FE928 64368898 649C0438

 Gi0/3        Y  Y   -- 2     4     ARPA   4096 64700928 64368828 5005F4AC


Router# show ip mpf interface GibabitEthernet 0/0 subblock 


 MPF is enabled

 CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 641089A4 63D72D94 6442F78C


Router# configure t

Router(config)# ip cef accounting per-prefix 

Router(config)# end

Router# show ip mpf interface GigabitEthernet 0/0 subblock


MPF is configured

IP MPF is not currently supported

  CEF accounting is enabled

CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 641089A4 63D72D94 6442F78C


Router# show ip mpf interface GibabitEthernet 0/0 subblock detailed


 MPF is enabled

 CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 641089A4 63D72D94 6442F78C


  Receive  :Packets 122                  Bytes 40603               

           :Punts   2071                 Drops 0                   

           :Bcast   0                   

  Transmit :Packets 0                    Bytes 0                   

           :Punts   124                  Drops 0                   

           :Bcast   0                   

  Response :Negated 0                    Disc  0                   

             Last    00:00:07

  Errors   :Input   error 0 crc 0, frame 0, runts 0

           :        overrun 0, resource 0, drops 0

           :Output  collision 0, underrun 0, drops 0

           :Message negated 0, discards 0, last 00:00:00

Additional References

The following sections provide references related to MPF for Broadband LAC.

Related Documents

Related Topic
Document Title

Cisco 7300: Upgrading and Troubleshooting Tasks, using the show version command.

Cisco 7300 Network Processing Engine Installation and Configuration, "Troubleshooting and Upgrading Tasks chapter."

Cisco Express Forwarding (CEF)

Cisco IOS Switching Services Command Reference, Release 12.3 T

IP commands: command syntax, command mode, defaults, usage guidelines, and examples

Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services, Release 12.3


Standards

Standards
Title

Gigabit Ethernet IEEE 802.3z

—

IEEE 802.1q

—


MIBs

MIBs
MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


IRFCs

RFCs
Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—


Technical Assistance

Description
Link

The Cisco Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport


Command Reference

This section documents only new and modified commands.

New commands:

•debug ip mpf

•ip mpf

•show ip mpf adjacency

•show ip mpf fib

•show ip mpf interface

•show ip mpf lac

•show ip mpf statistics

•show ip mpf vcci

Modified command:

•show version

debug ip mpf

To enable debugging on a Cisco 7301 router that has the second CPU enabled for Multi-Processor Forwarding (MPF) for Broadband LAC, use the debug ip mpf command in privileged EXEC mode. To disable debugging output, use the no form of this command.

debug ip mpf [adjacency | elog | error | fib [events [access-list]] | interface [control] | l2tp | statistics]

no debug ip mpf [adjacency | elog | error | fib [events [access-list]] | interface [control] | l2tp | statistics]

Syntax Description

adjacency

(Optional) Information about adjacent node events.

elog

(Optional) Event logging. Enables or disables logging information about significant internal MPF events.

error

(Optional) Interface and session setup errors.

fib

(Optional) Information about routing events (in the forwarding information base (FIB)).

events

(Optional) Table events.

access-list

(Optional) Limits debugging collection to packets that match the access list number. This is a standard IP access list number, 1-99.

interface

(Optional) Information on interfaces.

control

(Optional) MPF for Broadband LAC control information pertaining to interfaces

l2tp

(Optional) PPPoE session and L2TP session/tunnel setup information.

statistics

(Optional) MPF for Broadband LAC statistics.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

Using the debug ip mpf command without any keywords only displays general MPF events.

We recommend you use the debug condition commands in conjunction with the MPF debug ip mpf command in order to limit the amount of debugging output especially in those cases where a large number of sessions will produce verbose output. When debug conditions are entered, the router generates debugging messages for packets entering or leaving the router on a specified interface or subinterface or for a session that meet specified conditions.

The conditions which are applicable to MPF include interface, username, and MAC address. The username and MAC address conditions pertain to a session and are applicable only to the debug ip mpf l2tp command. The debug ip mpf l2tp command requires the username and MAC address conditions.

For example, the debug condition username <username> command generates debugging output only for interfaces with packets that specify the value of that <username>.

The router monitors interfaces to learn if any packets contain the specified value for certain conditions. If the condition is met on an interface or subinterface or for a session, debug command output will be displayed for that interface or session.

Refer to the "Conditionally Triggered Debugging" chapter of the Cisco IOS Debug Command Reference for more information on the debug condition commands.

Note When more than one debug command is enabled, it's possible that if one command meets its conditions, the other debug command's output may not be visible. For example, if you use the debug ip mpf l2tp command with a username condition and a second debug ip mpf interface control command was enabled, the latter command might not display any output. Add a pertinent interface condition for the second debug ip mpf interface control command to enable displaying the output after the interface condition is met.

Examples

The following examples display debugging turned on to collect various debugging information: 

Router# debug ip mpf

MPF general debugging is on


Router# debug ip mpf adjacency

MPF adjacency debugging is on


00:39:19:Gi0/3 MPF:Deleting adjacency 0x6497BFDC for 200.1.1.1 id 0x6497BFDC

00:39:19:Gi0/3 MPF:Allocated adjacency 0x6497BFDC for 200.1.1.1 VCCI 1 flags 0 len 0 id 
0x6497BFDC

00:39:19:Gi0/3 MPF:Sent adjacency 0x6497BFDC add for 200.1.1.1 VCCI 1 flags 0 len 0 id 
0x6497BFDC

00:39:19:Gi0/3 MPF:Updating adj 0x6497BFDC for 200.1.1.1 VCCI 4 flags 0 len 14 id 
0x6497BFDC

00:39:19:Gi0/3 MPF:Sent adjacency 0x6497BFDC update for 200.1.1.1 VCCI 4 flags 0 len 14 id 
0x6497BFDC


Router# debug ip mpf error

MPF error debugging is on


Router# debug ip mpf fib events

MPF forwarding event debugging is on


00:40:18:MPF:Found table 0 200.0.0.0/24 leaf 0x64680A48 id null

00:40:18:MPF:Deleting leaf 0x64680A48 200.0.0.0/24 adj null

00:40:18:MPF:Sent upon delete leaf 0x64680A48 200.0.0.0/24 adj null

00:40:18:MPF:Freeing leaf 0x64680A48 for table 0 200.0.0.0/24

00:40:18:MPF:Allocated leaf 0x64680A48 for table 0 0.0.0.0/0

00:40:18:MPF:Updating attached leaf 0x64680A48 table 0 200.0.0.0/24 flags 9 adj punt

00:40:18:MPF:Sent attached leaf 0x64680A48 table 0 200.0.0.0/24 flags 9 adj punt

00:40:18:MPF:Found table 0 200.0.0.0/24 leaf 0x64680A48 id punt

00:40:18:MPF:Adding attached leaf 0x64680A48 table 0 200.0.0.0/24 flags 9 adj punt

00:40:18:MPF:Sent attached leaf 0x64680A48 table 0 200.0.0.0/24 flags 9 adj punt


Router(config)# access-list 1 permit 200.1.1.1 

Router(config)# end

Router# debug ip mpf fib events 1

MPF forwarding event debugging is on for access list 1

Router# clear ip route *


00:43:04:MPF:Found table 0 200.1.1.1/32 leaf 0x64681390 id null

00:43:04:MPF:Deleting leaf 0x64681390 200.1.1.1/32 adj null

00:43:04:MPF:Sent upon delete leaf 0x64681390 200.1.1.1/32 adj null

00:43:04:MPF:Unlocking leaf 0x64681390 table 0 200.1.1.1/32 flags 0 from adj null

00:43:04:MPF:Sent update for leaf 0x64681390 table 0 200.1.1.1/32 flags 0 adj punt

00:43:04:MPF:Freeing leaf 0x64681390 for table 0 200.1.1.1/32

00:43:04:MPF:Leaf 0x64681324 table 0 0.0.0.0/0 flags 0 adj punt changed 200.1.1.1/32

00:43:04:MPF:Updating host route leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj punt

00:43:04:MPF:Sent host route leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj punt

00:43:04:MPF:Locking leaf 0x64681324 table 0 200.1.1.1/32 flags 10 with adj 0x6497BFDC

00:43:04:MPF:Sent update for leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj 0x6497BFDC

00:43:04:MPF:Found table 0 200.1.1.1/32 leaf 0x64681324 id 0x6497BFDC

00:43:04:MPF:Adding attached leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj 0x6497BFDC

00:43:04:MPF:Sent attached leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj 0x6497BFDC

00:43:04:MPF:Found table 0 200.1.1.1/32 leaf 0x64681324 id 0x6497BFDC

00:43:04:MPF:Adding host route leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj 
0x6497BFDC

00:43:04:MPF:Sent host route leaf 0x64681324 table 0 200.1.1.1/32 flags 10 adj 0x6497BFDC


Router# debug ip mpf interface control

MPF interface control debugging is on


Router(config)# interface gi0/2

Router(config-if)# shutdown

Router(config-if)# end

Router#

00:44:38:Gi0/2 MPF:State changed to DOWN

00:44:38:Gi0/2 MPF:Updating ICB 1 VCCI 3 with encap drop, MTU max 1528 min 18


Router# debug ip mpf l2tp

MPF L2TP debugging is on


Router# debug ip mpf statistics

MPF statistics debugging is on

Related Commands

Command
Description

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf statistics

Shows MPF data packet statistics.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


ip mpf

To enable Multi-Processor Forwarding (MPF) for Broadband LAC on the second CPU of a Cisco 7301 router, use the ip mpf command in global configuration mode. To disable MPF for Broadband LAC forwarding, use the no form of this command.

ip mpf

no ip mpf

Syntax Description

This command has no arguments or keywords.

Defaults

MPF for Broadband LAC forwarding is enabled by default on the second CPU.

Command Modes

Global configuration

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

MPF for Broadband LAC forwarding is enabled by default on the second CPU (CPU 1). The MPF-enabling software image is bundled together with the Cisco IOS image. Cisco IOS images that contain the special MPF images must be purchased.

Examples

The following example disables MPF for Broadband LAC forwarding on the second CPU: 

Router(config)# no ip mpf

Related Commands

Command
Description

debug ip mpf

Enables MPF debugging.

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf statistics

Shows MPF data packet statistics.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


show ip mpf adjacency

To show information about adjacency nodes when Multi-Processor Forwarding (MPF) for Broadband LAC is enabled on the second CPU on a Cisco 7301 router, use the show ip mpf adjacency command in privileged EXEC mode.

show ip mpf adjacency [GibabitEthernet slot/port | id number | vcci number]

Syntax Description

GibabitEthernet

(Optional) Displays the specified Gigabit Ethernet interface

slot/port

Displays the slot number and port number for the Gigabit Ethernet interface

id number

(Optional) Displays information for a specific adjacency identifier. number is the adjacency identifier number.

vcci number

(Optional) Displays all adjacencies on a particular Virtual Channel Common Index (VCCI). VCCI is associated with an interface. number is the VCCI number.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

Use this command to display MPF for Broadband LAC adjacency table information and to verify that an adjacency exists for a connected device, particularly the IP address of the interface representing the next hop for packet routing.

Examples

The following example displays information (all adjacencies on VCCI number 3, the next hop IP address) adjacent to the Gigabit Ethernet 0/1 interface: 

Router# show ip mpf adjacency GibabitEthernet 0/1

------------------------------------------------------


 Protocol Interface  ID       VCCI  Address

 IP       Gi0/1      63BB9040 3     12.1.1.1

 IP       Gi0/1      63BB9170 3     12.1.1.4

 IP       Gi0/1      63BB9208 3     12.1.1.3

 IP       Gi0/1      63BB90D8 3     12.1.1.2

 IP       Gi0/1      63BB8DE0 3     12.1.1.100

Table 1 describes the fields shown in the display.

Table 1 show ip mpf adjacency Field Descriptions

Field
Description

Protocol

Routed protocol to which the adjacency is related.

Interface

Outgoing interface associated with the adjacency.

ID

The adjacency identifier

VCCI

The Virtual Channel Common Index (VCCI) number.

Address

The next-hop IP address reachable via Gi0/1.


The following example displays all adjacencies on VCCI ID number 3: 

Router# show ip mpf adjacency vcci 3

------------------------------------------


 Protocol Interface  ID       VCCI  Address

 IP       Gi0/1      63BB9040 3     12.1.1.1

 IP       Gi0/1      63BB9170 3     12.1.1.4

 IP       Gi0/1      63BB9208 3     12.1.1.3

 IP       Gi0/1      63BB90D8 3     12.1.1.2

 IP       Gi0/1      63BB8DE0 3     12.1.1.100

The following example displays adjacency information for adjacency ID number 63BB9040: 

Router# show ip mpf adjacency id 63BB9040

-----------------------------------------------

 Protocol Interface  ID       VCCI  Address

 IP       Gi0/1      63BB9040 3     12.1.1.1

Related Commands

Command
Description

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf statistics

Shows MPF data packet statistics.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


show ip mpf fib

To show information about the forwarding information base (FIB) on a Cisco 7301 router enabled for Multi-Processor Forwarding (MPF) for Broadband LAC, use the show ip mpf fib command in privileged EXEC mode.

show ip mpf fib [A.B.C.D E.F.G.H]

Syntax Description

A.B.C.D E.F.G.H

(Optional) Destination prefix (IP address, A.B.C.D) and mask (E.F.G.H) in dotted decimal format.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

Use this command to show forwarding information used to fast forward IP traffic for a destination prefix (IP address and mask). Multiple hops can be required to reach the destination prefix; each hop is via a connected adjacency that has its own address.

Examples

The following example displays the forwarding information for IP address 12.1.1.1 with subnet mask 255.255.255.255. The output shows the IP address and mask (Prefix), the adjacency ID number (Next Hop), and the output interface (Interface Gi 0/1). 

Router# show ip mpf fib 12.1.1.1 255.255.255.255


 Prefix              Next Hop Interface

 12.1.1.1/32         63BB9040 Gi0/1

The following example displays the forwarding information based upon all IP addresses and subnets: 

Router# show ip mpf fib 


 Prefix              Next Hop Interface

 0.0.0.0/32          receive  

 0.0.0.0/0           drop     Null0 (default route handler entry)

 10.0.0.0/32         receive  

 10.0.0.0/24         punt    

 10.0.0.121/32       63BB8AE8 

 10.0.0.201/32       receive  

 10.0.0.255/32       receive  

 12.1.1.0/32         receive  

 12.1.1.0/24         punt    

 12.1.1.1/32         63BB9040 Gi0/1

 12.1.1.2/32         63BB90D8 Gi0/1

 12.1.1.3/32         63BB9208 Gi0/1

 12.1.1.4/32         63BB9170 Gi0/1

 12.1.1.100/32       63BB8DE0 Gi0/1

 12.1.1.101/32       receive  

 12.1.1.255/32       receive  

 13.1.1.0/32         receive  

 13.1.1.0/24         punt    

 13.1.1.1/32         receive  

 13.1.1.255/32       receive

The following example displays the forwarding information used to forward via MPF for Broadband LAC to the prefix representing the 200.1.1.0/24 subnet. The output highlights all prefixes within this subnet. 

Router# show ip mpf fib 200.1.1.0 255.255.255.0


 Prefix              Next Hop Interface

 200.1.1.0/32        receive  

 200.1.1.0/24        punt    

 200.1.1.1/32        64B2F7DC Gi0/3

 200.1.1.12/32       receive  

 200.1.1.255/32      receive

Table 2 describes the significant fields and output text shown in the output example.

Table 2 show ip mpf fib Field Descriptions 

Field
Description

Prefix

Specifies the network prefix (IP address and mask).

Next Hop

Specifies the adjacency ID number, drop, receive, or punt status.

Interface

Output or next hop interface.

receive

Packets forwarded to this adjacency are received.

drop

Packets forwarded to this adjacency are dropped.

punt

Represents destinations that cannot be switched in the normal path and that are punted to the next fastest switching vector.


Related Commands

Command
Description

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf statistics

Shows MPF data packet statistics.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


show ip mpf interface

To show interface-related information for all interfaces that support MPF for Broadband LAC on a Cisco 7301 router, use the show ip mpf interface command in privileged EXEC mode.

show ip mpf interface [GigabitEthernet slot/port [statistics | subblock [detailed]] | statistics | subblock]

Syntax Description

GigabitEthernet

(Optional) Displays interface-related information for a specified Gigabit Ethernet interface.

slot/port

Displays the slot number and port number for the Gigabit Ethernet interface.

statistics

(Optional) Displays interface counters.

subblock

(Optional) Displays interface subblock information.

detailed

(Optional) Displays detailed information on all MPF-supported Gigabit Ethernet interfaces.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

Each interface has an associated VCCI number. When Cisco Express Forwarding (CEF) accounting or Virtual Private Network (VPN) routing/forwarding (VRF) is configured, fast forwarding of IP traffic is disabled.

Examples

The following example displays interface counters for all MPF-supported interfaces (Gi0/0, Gi0/1, Gi0/2): 

Router# show ip mpf interface statistics


 Gi0/0, VCCI 2

  Receive  :Packets 5                    Bytes 1630                

           :Punts   73                   Drops 0                   

           :Bcast   0                   

  Transmit :Packets 0                    Bytes 0                   

           :Punts   6                    Drops 0                   

           :Bcast   0                   

  Response :Negated 0                    Disc  0                   

             Last    00:00:07

  Errors   :Input   error 0 crc 0, frame 0, runts 0

           :        overrun 0, resource 0, drops 0

           :Output  collision 0, underrun 0, drops 0

           :Message negated 0, discards 0, last 00:00:00


 Gi0/1, VCCI 3

  Receive  :Packets 18956                Bytes 7438945             

           :Punts   6                    Drops 0                   

           :Bcast   0                   

  Transmit :Packets 18847                Bytes 7270512             

           :Punts   119                  Drops 0                   

           :Bcast   0                   

  Response :Negated 0                    Disc  0                   

             Last    00:00:08

  Errors   :Input   error 0 crc 0, frame 0, runts 0

           :        overrun 0, resource 0, drops 0

           :Output  collision 0, underrun 0, drops 0

           :Message negated 0, discards 0, last 00:00:00

 Gi0/2, VCCI 4

  Receive  :Packets 25706                Bytes 10679484            

           :Punts   13878                Drops 0                   

           :Bcast   0                   

  Transmit :Packets 39575                Bytes 21512973            

           :Punts   6                    Drops 0                   

           :Bcast   0                   

  Response :Negated 0                    Disc  0                   

             Last    00:00:01

  Errors   :Input   error 0 crc 0, frame 0, runts 0

           :        overrun 0, resource 0, drops 0

           :Output  collision 0, underrun 0, drops 0

           :Message negated 0, discards 0, last 00:00:00

The following example displays information about each interface (Gi0/1, Gi0/2, Gi0/3) by subblock: 

Router# show ip mpf interface subblock


 MPF is enabled

 CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/1        Y  Y   -- 0     2     ARPA   4096 646FC928 64368908 649BB290

 Gi0/2        Y  Y   -- 1     3     ARPA   4096 646FE928 64368898 649C0438

 Gi0/3        Y  Y   -- 2     4     ARPA   4096 64700928 64368828 5005F4AC

The following example displays information for the Gigabit Ethernet 0/0 interface when Cisco Express Forwarding (CEF) Accounting, an unsupported feature, is enabled. The output text regarding whether IP MPF is supported and CEF accounting is enabled is displayed depending on the CEF Accounting settings selected: 

Router# show ip mpf interface GibabitEthernet 0/0 subblock 


MPF is enabled

CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 64228024 63E92274 64556ECC


Router# configure t

Router(config)# ip cef accounting per-prefix 

Router(config)# end

Router# show ip mpf interface GigabitEthernet 0/0 subblock



MPF is configured

IP MPF is not currently supported

  CEF accounting is enabled

CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 641089A4 63D72D94 6442F78C

The following example shows that a configuration for Virtual Private Network (VPN) routing/forwarding (VRF), an unsupported feature, is enabled. The output text regarding whether IP MPF is supported and IP VRF is enabled is displayed depending on the VRF settings selected: 

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)# ip vrf vpn1

Router(config-vrf)# end

Router# show ip mpf interface subblock


MPF is configured

IP MPF is not currently supported

   IP VRF is enabled

CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 64228024 63E92274 64556ECC

 Gi0/1        Y  Y   -- 1     3     ARPA   4096 6422A024 63E92204 6458CC2C

 Gi0/2        Y  Y   -- 2     4     ARPA   4096 6422C024 63E92194 645A4F70

The following example displays all detailed information for the Gigabit Ethernet 0/0 interface by subblock: 

Router# show ip mpf interface GibabitEthernet 0/0 subblock detailed


 MPF is enabled

 CPU 1 is running


 Interface    Up MPF Un Index VCCI  Encap  Size Maptable If Info  Info Map

 Gi0/0        Y  Y   -- 0     2     ARPA   4096 641089A4 63D72D94 6442F78C


  Receive  :Packets 122                  Bytes 40603               

           :Punts   2071                 Drops 0                   

           :Bcast   0                   

  Transmit :Packets 0                    Bytes 0                   

           :Punts   124                  Drops 0                   

           :Bcast   0                   

  Response :Negated 0                    Disc  0                   

             Last    00:00:07

  Errors   :Input   error 0 crc 0, frame 0, runts 0

           :        overrun 0, resource 0, drops 0

           :Output  collision 0, underrun 0, drops 0

           :Message negated 0, discards 0, last 00:00:00

Table 3 describes significant fields shown in the output examples.

Table 3 show ip mpf interface Field Descriptions 

Field
Description

Up

The interface is up (Y) or down (N).

MPF

MPF is enabled (Y) or disabled (N) on the interface.

Un

Unsupported features. All traffic received on this interface is punted (and fast forwarding disabled) if I- (input) or IO is present. All traffic destined towards this interface is punted if -O (output) or IO is present. The I- condition can be set by input features such as access lists, unicast RPF, or policing; the -O condition is set by any QoS or features such as access lists.

Index

Internal enumeration of the interface.

VCCI

Allocated identifier for the interface.

Encap

Encapsulation. This can be one of the following:

•Actual data encapsulation type

•punt (if interface is I-/IO)

•drop (if the interface is down)

Size/Maptable/If Info/Info Map

Internal interface information.

Negated

Number of counters received from the module which was determined to have decreased in value and which upon detection was corrected.

Disc(ard)

Number of messages received from the module in which the set of counters was deemed not to have advanced.


Related Commands

Command
Description

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf statistics

Shows MPF data packet statistics.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


show ip mpf lac

To show L2TP Access Concentrator (LAC) information on a Cisco 7301 router enabled for Multi-Processor Forwarding (MPF) for Broadband LAC, use the show ip mpf lac command in privileged EXEC mode.

show ip mpf lac [detail | interface {interface-type interface-number} | session [l2tp [id id] | pppoe [id id] | tunnel id]

Syntax Description

detail

(Optional) Displays Media Access Control (MAC) rewrite information.

interface

(Optional) Displays information for a physical interface.

interface-type

Gigabit Ethernet interface.

interface-number

Gigabit Ethernet slot/port number.

session

(Optional) Displays LAC information by session.

l2tp

(Optional) Displays LAC information for all L2TP sessions.

pppoe

(Optional) Displays LAC information for all PPPoE sessions

id

(Optional) Displays LAC information for an individual L2TP session or PPPoE session with a specific session ID number.

tunnel

(Optional) Displays the number of L2TP tunnels and associated tunnel information.

id

L2TP session number or PPPoE session number or tunnel number, as designated by the "Local" output field.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

The show ip mpf lac command without any arguments is the primary command for displaying session information. The command displays the complete set of connections and their segments with the associated binding between PPPoE sessions and L2TP session/tunnels.

Examples

The following example without any arguments displays all the PPPoE session and L2TP session/tunnel information on the router: 

Router# show ip mpf lac 


 Connection Segment 1 Type  Local Len IP MTU Segment 2 Type  Local Len IP MTU

 641A94EC   641872F8  PPPoE 201   24  1500   64187280  L2TP  202   38  65497  

 641A9510   64187348  PPPoE 200   24  1500   641872A8  L2TP  201   38  65497  

 641A9534   64187370  PPPoE 199   24  1500   641872D0  L2TP  200   38  65497  

 641A9558   64187398  PPPoE 198   24  1500   64187320  L2TP  199   38  65497  

 641A957C   64187460  PPPoE 197   24  1500   641873C0  L2TP  198   38  65497  

 641A95A0   64187488  PPPoE 196   24  1500   641873E8  L2TP  197   38  65497  

 641A95C4   641874B0  PPPoE 195   24  1500   64187410  L2TP  196   38  65497  

 641A95E8   641874D8  PPPoE 194   24  1500   64187438  L2TP  195   38  65497  

 641A960C   641875A0  PPPoE 193   24  1500   64187500  L2TP  194   38  65497  

 641A9630   641875C8  PPPoE 192   24  1500   64187528  L2TP  193   38  65497  

 641A9654   641875F0  PPPoE 191   24  1500   64187550  L2TP  192   38  65497  

 641A9678   64187618  PPPoE 190   24  1500   64187578  L2TP  191   38  65497  

 641A969C   641876E0  PPPoE 189   24  1500   64187640  L2TP  190   38  65497  

 641A96C0   64187708  PPPoE 188   24  1500   64187668  L2TP  189   38  65497  

 641A96E4   64187730  PPPoE 187   24  1500   64187690  L2TP  188   38  65497  

 641A9708   64187758  PPPoE 186   24  1500   641876B8  L2TP  187   38  65497  

 641A972C   64187820  PPPoE 185   24  1500   64187780  L2TP  186   38  65497  

 641A9750   64187848  PPPoE 184   24  1500   641877A8  L2TP  185   38  65497  

 641A9774   64187870  PPPoE 183   24  1500   641877D0  L2TP  184   38  65497

The following example shows additional MAC rewrite information for each connection: 

Router# show ip mpf lac detail 


 Connection Segment 1 Type  Local Len IP MTU Segment 2 Type  Local Len IP MTU

 641A94EC   641872F8  PPPoE 201   24  1500   64187280  L2TP  202   38  65497  

            VCCI 208, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C963C9                 C801010106A506A500080000020216D0

                                             0DDC0000FF03

 641A9510   64187348  PPPoE 200   24  1500   641872A8  L2TP  201   38  65497  

            VCCI 207, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C863C9                 C801010106A506A500080000020216D0

                                             0DDB0000FF03

 641A9534   64187370  PPPoE 199   24  1500   641872D0  L2TP  200   38  65497  

            VCCI 206, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C763C9                 C801010106A506A500080000020216D0

                                             0DDA0000FF03

 641A9558   64187398  PPPoE 198   24  1500   64187320  L2TP  199   38  65497  

            VCCI 205, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C663C9                 C801010106A506A500080000020216D0

                                             0DD90000FF03

The following example displays MAC rewrite information for each connection when an idle timer is added to the configuration: 

Router# show running-config interface virtual-Template 1

Building configuration...


Current configuration :156 bytes

!

interface Virtual-Template1

 ip unnumbered Loopback0

 no peer default ip address

 ppp authentication chap

 ppp timeout idle 120 either

end


Router# show ip mpf lac detail


 Connection Segment 1 Type  Local Len IP MTU Segment 2 Type  Local Len IP MTU

 641A94EC   641872F8  PPPoE 201   24  1500   64187280  L2TP  202   38  65497  

            VCCI 208, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C963C9                 C801010106A506A500080000020216D0

                                             0DDC0000FF03

            Idle direction either,

            last in 00:01:36 out 00:01:36

 641A9510   64187348  PPPoE 200   24  1500   641872A8  L2TP  201   38  65497  

            VCCI 207, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C863C9                 C801010106A506A500080000020216D0

                                             0DDB0000FF03

            Idle direction either,

            last in 00:01:36 out 00:01:36

 641A9534   64187370  PPPoE 199   24  1500   641872D0  L2TP  200   38  65497  

            VCCI 206, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C763C9                 C801010106A506A500080000020216D0

                                             0DDA0000FF03

            Idle direction either,

            last in 00:01:36 out 00:01:36

 641A9558   64187398  PPPoE 198   24  1500   64187320  L2TP  199   38  65497  

            VCCI 205, VCD 0                  Tunnel 19855, Mode L2L2, Seq N   

            000E3975C01A000E3975BC1A81000070 4500000000000000FF1129DDC801010C

            8864110000C663C9                 C801010106A506A500080000020216D0

                                             0DD90000FF03

            Idle direction either,

            last in 00:01:37 out 00:01:37

The following example displays the LAC information for the Gigabit Ethernet interface 0/2.112: 

Router# show ip mpf lac interface gi0/2.112

VCCI  Interface 

8     Gi0/2.112 

135   Gi0/2.112 

134   Gi0/2.112 

133   Gi0/2.112 

132   Gi0/2.112

The following example displays information about the different types of LAC sessions, which are listed by local session ID: 

Router# show ip mpf lac session


 Total number of L2TP sessions:169


 Local Remote If    Context  Tunnel      DF Seq IP MTU Len

 798   174    0     67B21120 35457/47563 N  N   65497  38 

 797   173    0     67B23860 35457/47563 N  N   65497  38 

 796   172    0     67B235A0 35457/47563 N  N   65497  38 

 795   171    0     67B247E0 35457/47563 N  N   65497  38 

 794   170    0     67B22DC0 35457/47563 N  N   65497  38 

 793   169    0     67B22B00 35457/47563 N  N   65497  38 

 792   168    0     67B22840 35457/47563 N  N   65497  38 

 791   167    0     67B24E80 35457/47563 N  N   65497  38 

 790   166    0     67B24AE0 35457/47563 N  N   65497  38 

 789   165    0     67B230C0 35457/47563 N  N   65497  38 

 788   164    0     67B21E00 35457/47563 N  N   65497  38 

 787   163    0     67B1C200 35457/47563 N  N   65497  38 

 786   162    0     67B1CB00 35457/47563 N  N   65497  38 

 785   161    0     67B1BF40 35457/47563 N  N   65497  38 

 784   160    0     67B1BC80 35457/47563 N  N   65497  38 

 783   159    0     67B1D0A0 35457/47563 N  N   65497  38 

 782   158    0     67B1CDE0 35457/47563 N  N   65497  38 

 781   157    0     67B1D500 35457/47563 N  N   65497  38 

 780   156    0     67A11C00 35457/47563 N  N   65497  38 

 779   155    0     67A11940 35457/47563 N  N   65497  38 


 Total number of PPPoE sessions:167


 Local If                        Context  VCCI  VCD   IP MTU Len

 829   Gi0/1.112                 64AC60E0 804   0     1500   24 

 828   Gi0/1.112                 64AC5FEC 803   0     1500   24 

 827   Gi0/1.112                 64AC5EF8 802   0     1500   24 

 826   Gi0/1.112                 64AC5B28 801   0     1500   24 

 821   Gi0/1.112                 64AC61D4 798   0     1500   24 

 820   Gi0/1.112                 64AC5D10 797   0     1500   24 

 815   Gi0/1.112                 64AC51A0 796   0     1500   24 

 814   Gi0/1.112                 64AC547C 795   0     1500   24 

 812   Gi0/1.112                 64AC4448 794   0     1500   24 

 811   Gi0/1.112                 64AC4630 793   0     1500   24 

 810   Gi0/1.112                 64AC4724 792   0     1500   24 

 809   Gi0/1.112                 64AC5388 791   0     1500   24 

 808   Gi0/1.112                 64AC5294 790   0     1500   24 

 807   Gi0/1.112                 64AC4DD0 789   0     1500   24 

 806   Gi0/1.112                 64AC4FB8 788   0     1500   24 

 813   Gi0/1.112                 64AC37E4 787   0     1500   24 

 805   Gi0/1.112                 64AC4EC4 786   0     1500   24 

 804   Gi0/1.112                 64AC5570 785   0     1500   24 

 803   Gi0/1.112                 64AC4CDC 784   0     1500   24 

 802   Gi0/1.112                 64AC4BE8 783   0     1500   24

The following example displays LAC information for all L2TP sessions: 

Router# show ip mpf lac session l2tp


 Total number of L2TP sessions:1


 Local Remote If    Context  Tunnel      DF Seq IP MTU Len

 801   177    0     67A14C60 18574/61698 N  N   65497  38

The following example displays LAC information for an individual L2TP session with the session ID number 801: 

Router# show ip mpf lac session l2tp id 801


 Local Remote If    Context  Tunnel      DF Seq IP MTU Len

 801   177    0     67A14C60 18574/61698 N  N   65497  38

The following example displays LAC information for all PPPoE sessions: 

Router# show ip mpf lac session pppoe


 Total number of PPPoE sessions:1


 Local If                        Context  VCCI  VCD   IP MTU Len

 832   Gi0/1.112                 64AC50AC 807   0     1500   24

The following example displays LAC information for an individual PPPoE session with the session ID number 832: 

Router# show ip mpf lac session pppoe id 832


 Local If                        Context  VCCI  VCD   IP MTU Len

 832   Gi0/1.112                 64AC50AC 807   0     1500   24

The following example displays the number of L2TP tunnels and associated tunnel information: 

Router# show ip mpf lac tunnel


 Total number of tunnels:1


 Local Remote Mode Remote Address  Port  Tport Count DF    ToS  UDP MTU

 35457 47563  L2L2 200.1.1.1       1701  IP    167   clr   clr  N/N 65497

The following example displays information for an individual L2TP tunnel with the tunnel ID number 18574: 

Router# show ip mpf lac tunnel 18574 


 Local Remote Mode Remote Address  Port  Tport Count DF    ToS  UDP MTU

 18574 61698  L2L2 200.1.1.1       1701  IP    1     clr   clr  N/N 65497

Table 4 describes significant fields shown in the output examples.

Table 4 show ip mpf lac Field Descriptions 

Field
Description

Context

Internal reference.

Count

Number of sessions in tunnel.

DF

DF bit setting. Always displays "N" for L2TP session keyword; not supported for LAC.

If

Interface number or Interface name for a PPPoE session. Not applicable for LAC L2TP.

Len

Length of protocol/encapsulation.

Local

Local session ID.

Mode

Layer two to layer two switch.

Port

User Datagram Protocol (UDP) port number for the L2TP traffic.

Remote

Remote session ID.

Remote address

IP address of the remote end of the tunnel (that is the L2TP network server (LNS) endpoint).

Seq

L2TP sequencing, always displays "N," not supported by MPF.

ToS

Type of Service setting, not supported for LAC.

Tport

Transport for L2TP is IP.

Tunnel

Local/Remote ID.

UDP

User Datagram Protocol (UDP) checksums. Always displays "N," not supported by MPF.

VCCI

Allocated virtual common channel index. Provides mapping of LAC sessions to interface via the VCCI.

VCD

Reserved for future use.


Related Commands

Command
Description

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf statistics

Shows MPF data packet statistics.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


show ip mpf statistics

To show Multi-Processor Forwarding (MPF) for Broadband LAC data packet statistics on a Cisco 7301 router enabled for MPF, use the show ip mpf statistics command in privileged EXEC mode.

show ip mpf statistics [dot1q [GigabitEthernet slot/port | id vlan-id] | traffic]

Syntax Description

dot1q

(Optional) Displays data packet statistics for all IEEE 802.1Q VLANs for an interface or for a specific IEEE 802.1Q VLAN across all interfaces or subinterfaces.

GigabitEthernet

(Optional) Displays data packet statistics for all IEEE 802.1Q VLANs for a specified Gigabit Ethernet interface.

slot/port

Displays the slot number and port number for the Gigabit Ethernet interface.

id

(Optional) Individual Virtual LAN identifier. Displays data packet statistics for an individual IEEE 802.1Q VLAN across all interfaces or subinterfaces.

vlan-id

Virtual LAN identifier. The allowed range is from 1 to 4094.

traffic

(Optional) Displays received and sent data packet traffic counters.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

The traffic output is similar to the traffic counters in the show ip traffic command.

Examples

The following example displays traffic counter statistics: 

Router# show ip mpf statistics traffic 


  Rcvd:  0 checksum errors

         0 fragments, 0 total reassembled

         0 reassembly timeouts, 0 failed reassembly

  Sent:  0 fragmented into 0 fragments, 0 failed

The following example displays data packet statistics for all VLANs on the Gigabit Ethernet 0/1 interface: 

Router# show ip mpf statistics dot1q gi0/1


VLAN      Packets                   Bytes

1        in 0                      in 0

1       out 0                     out 0

100      in 0                      in 0

100     out 0                     out 0

112      in 30                     in 8452

112     out 18                    out 688

The following example displays data packet statistics for the VLAN ID of 112 and lists all interfaces or subinterfaces on which VLAN 112 is configured: 

Router# show ip mpf statistics dot1q id 112


VLAN Interface        Packets                   Bytes

112  Gi0/1.112       in 30                     in 8452

112  Gi0/1.112       out 18                    out 688

Related Commands

Command
Description

show ip traffic

Displays statistics about IP traffic.

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf vcci

Displays the Virtual Channel Common Index (VCCI) mapping to interfaces.


show ip mpf vcci

To display the Virtual Channel Common Index (VCCI) mapping to interfaces on a Cisco 7301 router, enabled for Multi-Processor Forwarding (MPF) for Broadband LAC, use the show ip mpf vcci command in privileged EXEC mode.

show ip mpf vcci number [interface [GibabitEthernet slot/port] | summary]

Syntax Description

number

The VCCI number.

interface

(Optional) Displays MPF-supported Gigabit Ethernet interfaces for a VCCI. VCCI is associated with an interface.

GibabitEthernet

(Optional) Displays the specified Gigabit Ethernet interface for a VCCI.

slot/port

The slot number and port number for the Gigabit Ethernet interface.

summary

(Optional) Displays summary information on MPF-supported Gigabit Ethernet interfaces by VCCI.


Defaults

No default behavior or values

Command Modes

Privileged EXEC

Command History

Release
Modification

12.3(7)XI1

This command was introduced.


Usage Guidelines

VCCI is associated with an interface.

Examples

The following example displays the MPF-supported interface (Gigabit Ethernet 0/1) for VCCI 3: 

Router# show ip mpf vcci 3 


 VCCI  Interface

 3     Gi0/1

The following example displays MPF-supported Gigabit Ethernet interface (Gi0/1) information by VCCI: 

Router# show ip mpf vcci interface gi0/1.112


 VCCI  Interface    Context

 7     Gi0/1.112    I 64C0F428

  Receive  :Packets 1177815              Bytes 910700653           

           :Punts   1300                 Drops 0                   

  Transmit :Packets 770578               Bytes 296721860           

           :Punts   0                    Drops 0                   

  Response :Negated 0                    Disc  1                   

             Last    00:00:04

Table 5 describes significant fields shown in the show ip mpf vcci interface output example.

Table 5 show ip mpf vcci interface Field Descriptions 

Field
Description

Negated

Number of counters received from the module which was determined to have decreased in value and which upon detection was corrected.

Disc(ard)

Number of messages received from the module in which the set of counters was deemed not to have advanced.


The following example displays summary MPF-supported interface information by VCCI: 

Router# show ip mpf vcci summary 


 Type         Base     Max   Used  Avail Num   Size  Allocated  Array

 Basic queue  63B45300 16384 0     16384 1     2     0          63B45300

 VLAN queue   63B3F2D4 3     3     0     4096  2     3          638E305C

 VCCI queue   63B4D32C 65531 9     65522 1     0     3188       63B4D32C

Related Commands

Command
Description

show ip mpf adjacency

Shows information about MPF adjacency nodes.

show ip mpf fib

Shows forwarding information base (FIB) information used to fast forward IP traffic.

show ip mpf interface

Shows interface-related information for all MPF interfaces.

show ip mpf lac

Shows MPF L2TP Access Concentrator (LAC) information.

show ip mpf statistics

Shows MPF data packet statistics.


show version

To display information about the currently loaded software version along with hardware and device information, use the show version command in EXEC mode.

show version

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values

Command Modes

User EXEC

Privileged EXEC

Command History

Release
Modification

9.0

This command was introduced.

12.3(4)T, 12.2(20)S

The output format of this command was updated.

12.3(7)XI1

This command was modified to show the second CPU information with Multi-Processor Forwarding (MPF) for Broadband LAC enabled on the Cisco 7301 only.


Usage Guidelines

This command displays information about the Cisco IOS software version currently running on your routing device, the ROM Monitor and Bootflash or boot loader software versions, and information about the hardware configuration, including the amount of system memory. Because this command displays both software and hardware information, the output of this command is the same as the output of the show hardware command. (The show hardware command is a command alias for the show version command.)

Specifically, the show version command provides the following information:

•Software information

–Main Cisco IOS image version

–Main Cisco IOS image capabilities (feature set)

–Location and name of bootfile in ROM

–Bootflash or boot loader image version (depending on platform)

–Second CPU information with Multi-Processor Forwarding (MPF) for Broadband LAC enabled on the Cisco 7301

•Device-specific information

–Device name

–System uptime

–System reload reason

–Config-register setting

–Config-register settings for after the next reload (depending on platform)

•Hardware information

–Platform type

–Processor type

–Processor hardware revision

–Amount of main (processor) memory installed

–Amount I/O memory installed

–Amount of Flash memory installed on different types (depending on platform)

–Processor board ID

The output of this command will vary by platform image, but generally uses the following format: 

Cisco IOS Software, <platform> Software (<image-id>), Version <software-version>,  
<software-type>

Technical Support: http://www.cisco.com/techsupport

Copyright (c) <date-range> by Cisco Systems, Inc.

Compiled <day> <date> <time> by <compiler-id>


ROM: System Bootstrap, Version <software-version>,  <software-type>

BOOTLDR: <platform> Software (image-id), Version <software-version>,  <software-type>


<router-name> uptime is <w> weeks, <d> days, <h> hours, <m> minutes

System returned to ROM by reload at <time> <day> <date>

System image file is "<filesystem-location>/<software-image-name>"

Last reload reason: <reload-reason>


Cisco <platform-processor-type> processor (revision <processor-revision-id>) with 
<free-DRAM-memory>K/<packet-memory>K bytes of memory.

Processor board ID <ID-number>

<CPU-type> CPU at <clock-speed>Mhz, Implementation <number>, Rev <Revision-number>, 
<kilobytes-Processor-Cache-Memory>KB <cache-Level> Cache

See the Examples section for descriptions of the fields in this output.

Examples

The following is sample output from the show version command from Cisco IOS Release 12.3(7)XI1, showing the second CPU (CPU 1) software with Multi-Processing Forwarding enabled on a Cisco 7301 router: 

Router# show version


Cisco IOS Software, 7301 Software (C7301-I12S-M), Experimental Version 
12.3(20040524:050554) [REL-v123_7_xi_throttle.ios-weekly 114]

Copyright (c) 1986-2004 by Cisco Systems, Inc.

Compiled Mon 24-May-04 06:26 by userid


ROM:System Bootstrap, Version 12.3(4r)T2, RELEASE SOFTWARE (fc1)

BOOTLDR:Cisco IOS Software, 7301 Software (C7301-BOOT-M), Experimental Version 
12.3(20040514:051116) [userid-v123_7_xi_throttle-ios-nightly-task 117]


Router uptime is 1 hour, 50 minutes

System returned to ROM by reload at 18:05:37 UTC Wed Mar 22 2004

System image file is "disk0:c7301-i12s-mz"


Cisco 7301 (NPE) processor (revision C) with 229376K/32768K bytes of memory.

Processor board ID 74806813

SB-1 CPU at 700MHz, Implementation 1, Rev 0.2, 512KB L2 Cache

1 slot midplane, Version 3.0


Last reset from watchdog nmi

CPU 1 Multi-Processor Forwarding, Fri May 21 14:21:57 2004 [dailybuil 119]

1 FastEthernet interface

3 GigabitEthernet interfaces

509K bytes of NVRAM.


62976K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).

32768K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x0

The following is sample output from the show version command from Cisco IOS Release 12.3(7)T1: 

C7301# show version

Cisco IOS Software, 7301 Software (C7301-IS-M), Version 12.3(7)T1, RELEASE SOFTWARE (fc2)

Technical Support:http://www.cisco.com/techsupport

Copyright (c) 1986-2004 by Cisco Systems, Inc.

Compiled Wed 21-Apr-04 21:52 by userid


ROM:System Bootstrap, Version 12.3(4r)T2, RELEASE SOFTWARE (fc1)

BOOTLDR:Cisco IOS Software, 7301 Software (C7301-BOOT-M), Experimental Version 
12.3(20040514:051116) [userid-v123_7_xi_throttle-ios-nightly-task 117]


Router uptime is 50 minutes

System returned to ROM by reload at 22:22:08 UTC Thu Apr 13 2004

System image file is "disk0:c7301-is-mz.123-7.T1"

Last reload reason:Reload command



Cisco 7301 (NPE) processor (revision C) with 229376K/32768K bytes of memory.

Processor board ID 74806813

SB-1 CPU at 700MHz, Implementation 1, Rev 0.2, 512KB L2 Cache

1 slot midplane, Version 3.0


Last reset from watchdog nmi

1 FastEthernet interface

3 Gigabit Ethernet interfaces

509K bytes of NVRAM.


62976K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).

32768K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x0

Table 6 describes significant fields for the show version command.

Table 6 show version Field Descriptions 

Field
Description

Cisco IOS Software, <platform> Software (<image-id>), Version <software-version>, <release-type>

Example:

Cisco IOS Software, 7301 Software (C7301-IS-M), Version 12.3(7)T

platform—Cisco hardware device name.

image-id—The coded software image identifier, in the format platform-features-format (for example, "c7301-is-m").

software-version—The Cisco IOS software release number, in the format x.y(z)A, where x.y is the main release identifier, z is the maintenance release number, and A, where applicable, is the special release train identifier. For example, 12.3(7)T indicates the seventh maintenance release of the 12.3T special technology release train.

Note In the full software image filename, 12.3(7)T appears as 123-7.T. In the IOS Upgrade Planner, 12.3(7)T appears as 12.3.7T (ED).

release-type—The description of the release type. Possible values include MAINTENANCE (for example, 12.3(3)), INTERIM (for example, 12.3(3.2)), and EARLY DEPLOYMENT (for example 12.2(20)S).

Tip Refer to "The ABC's of Cisco IOS Networking" (available on Cisco.com) for more information on Cisco IOS software release numbering and software versions.

Cisco IOS is a registered trademark (R) of Cisco Systems, Inc. 

Technical Support: 
http://www.cisco.com/techsupport

Copyright (c) <date-range> by Cisco Systems, Inc.

The Cisco Technical Assistance Center (TAC) contains more than 30,000 pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

Cisco IOS software, including the source code, user-help, and documentation, is copyrighted by Cisco Systems, Inc. It is Cisco's policy to enforce its copyrights against any third party who infringes on its copyright.

ROM: System Bootstrap, Version 12.3(4r)T2, RELEASE SOFTWARE (fc1)

The system "bootstrap" software, stored in ROM memory.

BOOTLDR:

The system "boot loader" software, stored in Flash memory (if applicable). 

<device> uptime is ...
Example:

C7301 uptime is 1 week, 3 days, 6 hours, 41 minutes

The amount of time the system has been up and running.

System returned to ROM by <reload-reason> at <time> <day> <date>


Example: 
System returned to ROM by reload 
at 22:22:08 UTC Thu Apr 13 2004

Shows the last recorded reason for a system reload, and time of last reload. 

Last reload reason: 
<reload-reason>
Example: 
Last reload reason: Reload 
command

Shows the last recorded reason for a system reload. 

Last reset from <reset-reason>

Example: 
Last reset from power-on

Shows the last recorded reason for a system reset. Possible reset-reason values include:

•power-on—System was reset with the initial power on or a power cycling of the device.

•s/w peripheral—System was reset due to a software peripheral.

•s/w nmi—System was reset by a nonmaskable interrupt (NMI) originating in the system software. For example, on some systems, you can configure the device to reset automatically if two or more fans fail.

•push-button—System was reset by manual activation of a RESET push-button (also called a hardware NMI).

•watchdog—System was reset due to a watchdog process.

•unexpected value—May indicate a bus error, such as for an attempt to access a nonexistent address (for example, "System restarted by bus error at PC 0xC4CA, address 0x210C0C0").

(This field was formerly labeled as the "System restarted by" field.)

System image file is "<file-location/file-name>"

Example: 
System image file is 
"disk0:c7301-is-mz.123-7.T1"

Displays the file location (local or remote filesystem) and the system image name. 

Cisco <platform> 
(<processor-type>) processor 
(revision 
<processor-revision-id>) with 
<free-DRAM-memory>K/<packet-memo
ry>K bytes of memory.
Example: Separate DRAM and Packet Memory 

Cisco RSP4 (R5000) processor 
with 65536K/2072K bytes of 
memory

Example: Combined DRAM and Packet Memory

Cisco 3660 (R527x) processor (revision 1.0) with 57344K/8192K bytes of memory.



This line can be used to determine how much Dynamic RAM (DRAM) is installed on your system, in order to determine if you meet the "Min. Memory" requirement for a software image. DRAM (including SDRAM) is used for system processing memory and for packet memory.

Two values, separated by a slash, are given for DRAM: The first value tells you how DRAM is available for system processing, and the second value tells you how much DRAM is being used for Packet memory.

The first value, Main Processor memory, is either:

•The amount of DRAM available for the processor, or

•The total amount of DRAM installed on the system.

The second value, Packet memory, is either:

•The total physical input/output (I/O) memory (or "Fast memory") installed on the router (Cisco 4000, 4500, 4700, and 7500 series), or

•The amount of "shared memory" used for packet buffering. In the shared memory scheme (Cisco 2500, 2600, 3600, and 7200 series), a percentage of DRAM is used for packet buffering by the router's network interfaces.

Note The terms "I/O memory" or "iomem"; "shared memory"; "Fast memory" and "PCI memory" all refer to "Packet Memory." Packet memory is either separate physical RAM or shared DRAM.

Separate DRAM and Packet Memory

The Cisco 4000, 4500, 4700, and 7500 series routers have separate DRAM and Packet memory, so you only need to look at the first number to determine total DRAM. In the example to the left for the Cisco RSP4, the first value shows that the router has 65536K (65,536 kilobytes, or 64 megabytes) of DRAM. The second value, 2072K, is the Packet memory.

Combined DRAM and Packet Memory

The Cisco 2500, 2600, 3600, 7301, and 7200 series routers require a minimum amount of I/O memory to support certain interface processors.

The Cisco 1600, 2500, 2600, 3600, 7301, and 7200 series routers use a fraction of DRAM as Packet memory, so you need to add both numbers to find out the real amount of DRAM. In the example to the left for the Cisco 3660, the router has 57,344 kilobytes (KB) of free DRAM and 8,192 KB dedicated to Packet memory. Adding the two numbers together gives you 57,344K + 8,192K = 65,536K, or 64 megabytes (MB) of DRAM.


For more details on memory requirements, see the document "How to Choose a Cisco IOS® Software Release" on Cisco.com. 

Configuration register is 
<value>

Example: 
Configuration register is 0x2142 
(will be 0x2102 at next reload)

Shows the current configured hex value of the software configuration register. If the value has been changed with the config-register command, the register value that will be used at the next reload is displayed in parentheses.

The boot field (final digit) of the software configuration register dictates what the system will do after a reset.

For example, when the boot field of the software configuration register is set to 00 (for example, 0x0), and you press the NMI button on a Performance Route Processor (PRP), the user-interface remains at the ROM monitor prompt (rommon>) and waits for a user command to boot the system manually. But if the boot field is set to 01 (for example, 0x1), the system automatically boots the first Cisco IOS image found in the onboard Flash memory SIMM on the PRP.

The factory-default setting for the configuration register is 0x2102. This value indicates that the router will attempt to load a Cisco IOS software image from Flash memory and load the startup configuration file. 

CPU 1 Multi-Processor 
Forwarding, <day> <date> <time> 
<year> [daily build number]
Example: 
CPU 1 Multi-Processor 
Forwarding, Thu Feb  5 23:26:14 
2004 [dailybuil 100]

Indicates the second CPU (CPU 1) is enabled for Multi-Processor Forwarding on day, date, time, and year.

[daily build number] is the user id of whoever built the image. In the example it was the daily build that built the image.


Related Commands

Command
Description

show inventory

Displays the Cisco Unique Device Identifier information, including the product ID, the version ID, and the serial number, for the hardware device and hardware components.


Glossary

adjacency—Information about adjacent node events.

broadband—Transmission methodology that multiplexes multiple independent signals onto one cable. In telecommunications, broadband is classified as any channel with bandwidth greater than 4kHz (typical voice grade). In LAN terminology, broadband is classified as a coaxial cable on which analog signaling is employed.

FF—Fast Forwarding. Accelerates broadband features by enabling the second CPU on the Cisco 7301 router.

FIB—Forwarding information base. Information used to fast forward IP traffic.

MPF for Broadband LAC—Multi-Processor Forwarding for broadband L2TP access concentrator. Enables a second CPU on the Cisco 7301 router to use a fast forwarding method of forwarding data packets in order to improve broadband feature performance.

ROMmon—ROM monitor. ROMmon is the initializing software that is executed when the router is powered up.

VCCI—Virtual Channel Common Index. The VCCI is used as an identifier for the interface. It supports a variety of interfaces that can be mapped to a single VCCI value or to multiple VCCI values.

Note Refer to Internetworking Terms and Acronyms for terms not included in this glossary.

Copyright © 2004 Cisco Systems, Inc. All rights reserved.