Configuring the Multiprotocol over ATM Client

The Multiprotocol over ATM (MPOA) client (MPC) involves ingress/egress cache management, data-plane and control-plane virtual circuit connection (VCC) management, MPOA frame processing, and participation in MPOA protocol and MPOA flow detection.

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Information About the Multiprotocol over ATM Client

MPC Software Module

The MPC software module implements the functionality of the MPC in compliance with the ATM Forum MPOA specification. An MPC identifies packets sent to an MPOA-capable router over the nonbroadcast multi-access (NBMA) network and establishes a shortcut VCC to the egress MPC, if possible. The MPC then routes these packets directly over this shortcut VCC, bypassing the intermediate routers and enabling the fast routing of internetwork-layer packets across an NBMA network. The Catalyst 5000 series switch can be designated as an MPC. If the Catalyst 5000 series switch is configured with an RSM/VIP2 (with an ATM interface) it can be configured as an MPC or an MPS.

A router is usually designated as an MPOA server (MPS), but can also be designated as an MPC. MPC on the router is primarily meant to provide router-initiated and router-terminated shortcuts for non-NBMA networks. For this reason, MPC information in this chapter primarily refers to the Catalyst 5000 series switch, and MPS information refers to the router or the RSM/VIP2 with an ATM interface in a Catalyst 5000 series switch.

How to Configure the Multiprotocol over ATM Client

Configuring the ELAN ID

For MPOA to work properly, an LEC must belong to an ELAN that has a defined ELAN ID.


Caution

If an ELAN ID is supplied, make sure both commands use the same elan-id value.

To obtain an ELAN ID, use either of the following commands in LANE database configuration mode.


Note

To configure an MPC on a Catalyst 5000 series ATM module, establish a connection with the ATM module, enter privileged mode, and then enter configuration mode. For information on performing these tasks, refer to the Catalyst 5000 Series Software Configuration Guide .

Command or Action

Purpose

 
Router(lane-config-dat)# name elan-name
 elan-id id

Defines an ELAN ID for the LEC (in LANE database configuration mode).

 
Router(lane-config-dat)# lane server-bus ethernet elan-name
 [elan-id id
]

Configures the LEC with the ELAN ID (in interface configuration mode).

Configuring the MPC

To configure an MPC on your network, perform the steps in this section.

SUMMARY STEPS

    1.    Router(config)# mpoa client config namempc-name

    2.    Router(config-if)# interface atm {mod-num/port-num | number }

    3.    Router(config-if)# mpoa client namempc-name

    4.    Router(config-if)# interfaceatm-num.sub-interface-num

    5.    Router(config-if)# lane client mpoa client namempc-name

    6.    Repeat Steps 4 and 5 for every LEC to be served by the MPC/MPS.


DETAILED STEPS
     Command or ActionPurpose
    Step 1 Router(config)# mpoa client config namempc-name 

    In global configuration mode, defines an MPC with a specified name.

     
    Step 2 Router(config-if)# interface atm {mod-num/port-num | number } 

    In interface configuration mode, specifies the ATM interface to which the MPC is associated.

     
    Step 3 Router(config-if)# mpoa client namempc-name  

    In interface configuration mode, attaches an MPC to the ATM interface.

     
    Step 4 Router(config-if)# interfaceatm-num.sub-interface-num  

    In interface configuration mode, specifies the ATM interface that contains the LEC to which you will bind the MPC.

     
    Step 5 Router(config-if)# lane client mpoa client namempc-name  

    In interface configuration mode, binds a LEC to the specified MPC.

     
    Step 6 Repeat Steps 4 and 5 for every LEC to be served by the MPC/MPS. 

     

    Configuring the MPC Variables

    An MPC has to be defined with a specified name before you can change its variables.

    To change the variables for an MPC, perform the steps in this section.

    SUMMARY STEPS

      1.    Router(mpoa-client-config)# mpoa client config namemps-name

      2.    Router(mpoa-client-config)# atm-addressatm-address

      3.    Router(mpoa-client-config)# shortcut-frame-countcount

      4.    Router(mpoa-client-config)# shortcut-frame-timetime


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 Router(mpoa-client-config)# mpoa client config namemps-name 

      Defines an MPC with the specified name.

       
      Step 2 Router(mpoa-client-config)# atm-addressatm-address 

      (Optional) Specifies the control ATM address that the MPC should use (when it is associated with a hardware interface).

       
      Step 3 Router(mpoa-client-config)# shortcut-frame-countcount 

      (Optional) Specifies the maximum number of times a packet can be routed to the default router within shortcut-frame time before an MPOA resolution request is sent.

       
      Step 4 Router(mpoa-client-config)# shortcut-frame-timetime 

      (Optional) Sets the shortcut-setup frame time for the MPC.

       

      Monitoring and Maintaining the MPC

      To monitor and maintain the configuration of an MPC, use the following commands as needed.

      SUMMARY STEPS

        1.    Router# show mpoa client [namempc-name ]

        2.    Router# show mpoa client [namempc-name ] cache [ingress | egress] [ip-addrip-addr ]

        3.    Router# show mpoa client [namempc-name ] statistics

        4.    Router# clear mpoa client [namempc-name ] cache [ingress | egress] [ip-addrip-addr ]

        5.    Router# show mpoa client [namempc-name ] [remote-device ]

        6.    Router# show mpoa default-atm-addresses


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 Router# show mpoa client [namempc-name ] 

        Displays information about a specified MPC or all MPCs.

         
        Step 2 Router# show mpoa client [namempc-name ] cache [ingress | egress] [ip-addrip-addr ] 

        Displays ingress and egress cache entries associated with an MPC.

         
        Step 3 Router# show mpoa client [namempc-name ] statistics 

        Displays all the statistics collected by an MPC.

         
        Step 4 Router# clear mpoa client [namempc-name ] cache [ingress | egress] [ip-addrip-addr ] 

        Clears cache entries.

         
        Step 5 Router# show mpoa client [namempc-name ] [remote-device ] 

        Displays all the MPOA devices that this MPC has learned.

         
        Step 6 Router# show mpoa default-atm-addresses 

        Displays the default ATM addresses for the MPC.

         

        Configuration Examples for the Multiprotocol over ATM Client

        Configuring MCP Example

        This section contains an example of the commands needed to configure an MPC. The lines beginning with exclamation points (!) are comments explaining the command shown on the subsequent line. The figure below shows an example of how you can configure your system to use MPOA.

        Figure 1. Example of an MPOA Configuration

        The following example shows how to configure the MPC and attach the MPC to a hardware interface: 

        ! Define the MPC "MYMPC"
 mpoa client config name MYMPC
! Leave everything as default
 exit
! Specify the ATM interface to which the MPC is attached
 interface ATM 1/0
! Attach MPC MYMPC to the HW interface
 mpoa client name MYMPC
! Specify the ATM interface that contains the LEC to which you will bind the MPC
 interface atm 1/0.1
! Bind a LANE client to the specified MPC
 lane client mpoa client name MYMPC
! Go back up to global config mode
 exit

        The following example shows a typical configuration file for the first MPC: 

        Current configuration:
!
version 11.3
! Go to LANE database config mode
 exit
lane database mpoa-test
hostname mpc-1
! Define the ELAN ID and ATM address
name elan1 server-atm-address 47.00918100000000613E5A2F01.006070174821.01
name elan1 elan-id 101
name elan2 server-atm-address 47.00918100000000613E5A2F01.006070174821.02
name elan2 elan-id 102
! Define the MPC "mpc-1"
mpoa client config name mpc-1
interface Ethernet0
! Go back up to global config mode
 exit
! Specify the ATM interface to which the MPC is attached
interface ATM0
atm pvc 1 0 5 qsaal
atm pvc 2 0 16 ilmi
lane config auto-config-atm-address
lane config database mpoa-test
! Attach MPC mpc-1 to the HW interface
mpoa client name mpc-1
! Specify the ATM interface that contains the LEC to which you will bind the MPC
interface ATM0.1 multipoint
lane server-bus ethernet elan1
! Bind a LANE client to the specified MPC
lane client mpoa client name mpc-1
lane client ethernet 1 elan1
! Go back up to global config mode
 exit

        The following example shows a typical configuration file for the second MPC: 

        Current configuration:
!
version 11.3
hostname mpc-2
! Go back up to global config mode
 exit
! Define the MPC "mpc-2"
mpoa client config name mpc-2
! Specify the ATM interface to which the MPC is attached
interface ATM0
atm pvc 1 0 5 qsaal
atm pvc 2 0 16 ilmi
mpoa client name mpc-2
! Specify the ATM interface that contains the LEC to which you will bind the MPC
interface ATM0.1 multipoint
lane server-bus ethernet elan2
lane client mpoa client name mpc-2
lane client ethernet 2 elan2
! Go back up to global config mode
 exit

        Additional References

        Related Documents

        Related Topic

        Document Title

        Cisco IOS commands

        Cisco IOS Master Commands List, All Releases

        ATM commands

        Cisco IOS Asynchronous Transfer Mode Command Reference

        Standards

        Standard

        Title

        None

        MIBs

        MIB

        MIBs Link

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

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

        RFCs

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        Title

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        Description

        Link

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        Feature Information for the Multiprotocol over ATM Client

        The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

        Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to . An account on Cisco.com is not required.
        Table 1 Feature Information for the Multiprotocol over ATM Client

        Feature Name

        Releases

        Feature Information

        Multiprotocol over ATM Client

        12.0(1) 12.1(1)E

        The Multiprotocol over ATM (MPOA) client (MPC) involves ingress/egress cache management, data-plane and control-plane virtual circuit connection (VCC) management, MPOA frame processing, and participation in MPOA protocol and MPOA flow detection.

        The following commands were introduced or modifief: clear mpoa client cache, debug mpoa client, lane client mpoa client name, mpoa client config name, mpoa client name, show mpoa client, show mpoa client cache, show mpoa client statistics.