Contents

Reuse MAC for ATM Route-Bridge Encapsulation

The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single VC on each sub-interface that connects each subscriber to the ISP.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information for Define Interface Policy-Map AV Pairs AAA.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http:/​/​www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Information About Reuse MAC for ATM Route-Bridge Encapsulation

When multiple hosts are connected to the Customer Premises Equipment (CPE) that in turn communicate to the Internet Service Provider (ISP) through the Broadband Remote Access Server (BRAS), the hosts are connected to the CPE through Ethernet and legacy ATM between the CPE and the BRAS, and aggregation using DSL Access Multiplexer (DSLAM).

In a standard setup, hosts are connected to the BRAS through sub-interfaces. A host sends a DHCP request to get its IP address from the DHCP server (can be the BRAS), and when the IP address is assigned, the packets start flowing with the IP. The ATM interface in the CPE is configured with Route-Bridge Encapsulation (RBE) to enable packets from the hosts to be bridged across the ATM connection as shown in the figure below.

Figure 1. Sample Topology for Reuse MAC for ATM Route-Bridge Encapsulation

The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single virtual circuit (VC) on each sub-interface that connects each subscriber to the ISP.

How to Configure Reuse MAC for ATM Route-Bridge Encapsulation

The Reuse MAC for ATM Route-Bridge Encapsulation configuration is available only in the ATM point-to-point sub-interface mode. Only physical Ethernet interfaces can be used as client interfaces whose MAC address can be used for the ATM P2P sub-interface.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    interface atm slot/port

    4.    atm ether-mac-address interface-name

    5.    atm ether-mac-address mac-address

    6.    end

    7.    show running interface atm slot /port


DETAILED STEPS
     Command or ActionPurpose
    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 interface atm slot/port


    Example:
    Router(config)# interface atm 1/0.1
     

    Specifies the ATM interface to be configured and enters ATM point-to-point sub-interface mode, where:

    • slot/port--Specifies the location of the interface

     
    Step 4 atm ether-mac-address interface-name


    Example:
    Router(config-subif)# atm ether-mac-address interface fastEthernet 0/0
     

    Specifies the interface name whose MAC address can be used to configure the ATM point-to-point sub-interfaces. This is option 1, skip step 5 if you prefer to specify the interface name and not the MAC address.

    Note   

    Step 4 and step 5 are exclusive of each other.

     
    Step 5 atm ether-mac-address mac-address


    Example:
    Router(config-subif)# atm ether-mac-address 00a1.0b65.87bc
     

    Specifies the user defined or explicit MAC address that can be used to configure the ATM point-to-point sub-interfaces. This is option 2, skip step 4 if you prefer to specify the MAC address and not the interface name.

    Note   

    Step 4 and step 5 are exclusive of each other.

     
    Step 6 end


    Example:
    Router(config-subif)# end
     

    Returns to the privileged EXEC mode.

     
    Step 7 show running interface atm slot /port


    Example:
    Router# show running interface atm0/0.000
     

    Displays the configuration.

     

    Configuration Examples for Reuse MAC for ATM Route-Bridge Encapsulation

    The following example shows how to configure the Reuse MAC for ATM Route-Bridge Encapsulation feature using an interface:

    Router> enable
Router# configure terminal
Router(config)# interface atm 3/0.100 point-to-point
Router(config-subif)# atm ether-mac-address interface fastEthernet 0/0
Router(config-subif)# end

    The following example shows how to configure the Reuse MAC for ATM Route-Bridge Encapsulation feature using an MAC address for the ATM point-to-point sub-interface:

    Router> enable
Router# configure terminal
Router(config)# interface atm 3/0.100 point-to-point
Router(config-subif)# atm ether-mac-address 00a1.0b65.87bc

    Router(config-subif)# end

    3. You can use the show run interface atm slot/port command to display the configuration:

    Router# show run interface atm0/0.000
Current configuration : 188 bytes
!
interface ATM3/0.100 point-to-point
 atm route-bridged ip
 atm ether-mac-address interface FastEthernet0/0
 no atm enable-ilmi-trap
 pvc 1/100
 !
end

    Additional References

    The following sections provide references related to the ATM OAM Ping feature.

    Related Documents

    Related Topic

    Document Title

    Configuring PVCs and mapping a protocol address to a PVC while configuring ATM

    Configuring PVCs section of Cisco IOS Configuring ATM Feature Guide

    Configuring ATM

    Cisco IOS Configuring ATM Feature Guide

    ATM commands, complete command syntax, command mode, command history, defaults, usage guidelines, and examples

    Cisco IOS Asynchronous Transfer Mode Command Reference

    Configuring ATM OAM traffic reduction

    "ATM OAM Traffic Reduction" feature module

    Configuring PVCs with or without OAM

    "Using OAM for PVC Management" sample configuration

    Detecting failures when using OAM cells and PVC management

    Troubleshooting PVC Failures When Using OAM Cells and PVC Management technical note

    Cisco IOS commands

    Cisco IOS Master Commands List, All Releases

    Standards

    Standard

    Title

    ITU-T Specification I.610 (ITU-T specification for B-ISDN operation and maintenance principles and functions).

    I.610 Series I: Integrated Services Digital Network Maintenance principles

    MIBs

    MIB

    MIBs Link

    None

    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

    RFCs

    RFC

    Title

    None

    --

    Technical Assistance

    Description

    Link

    The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

    To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

    Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

    http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

    Feature Information for Reuse MAC for ATM Route-Bridge Encapsulation

    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 Reuse MAC for ATM Route-Bridge Encapsulation

    Feature Name

    Releases

    Feature Information

    Reuse MAC for ATM Route-Bridge Encapsulation

    15.1(1)T

    The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single VC on each sub-interface that connects each subscriber to the ISP.

    This feature was introduced in Cisco IOS RElease 15.1(1)T. The following commands were introducef: atm ether-mac-address.

    Reuse MAC for ATM Route-Bridge Encapsulation

    Reuse MAC for ATM Route-Bridge Encapsulation

    The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single VC on each sub-interface that connects each subscriber to the ISP.

    Finding Feature Information

    Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information for Define Interface Policy-Map AV Pairs AAA.

    Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http:/​/​www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

    Information About Reuse MAC for ATM Route-Bridge Encapsulation

    When multiple hosts are connected to the Customer Premises Equipment (CPE) that in turn communicate to the Internet Service Provider (ISP) through the Broadband Remote Access Server (BRAS), the hosts are connected to the CPE through Ethernet and legacy ATM between the CPE and the BRAS, and aggregation using DSL Access Multiplexer (DSLAM).

    In a standard setup, hosts are connected to the BRAS through sub-interfaces. A host sends a DHCP request to get its IP address from the DHCP server (can be the BRAS), and when the IP address is assigned, the packets start flowing with the IP. The ATM interface in the CPE is configured with Route-Bridge Encapsulation (RBE) to enable packets from the hosts to be bridged across the ATM connection as shown in the figure below.

    Figure 1. Sample Topology for Reuse MAC for ATM Route-Bridge Encapsulation

    The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single virtual circuit (VC) on each sub-interface that connects each subscriber to the ISP.

    How to Configure Reuse MAC for ATM Route-Bridge Encapsulation

    The Reuse MAC for ATM Route-Bridge Encapsulation configuration is available only in the ATM point-to-point sub-interface mode. Only physical Ethernet interfaces can be used as client interfaces whose MAC address can be used for the ATM P2P sub-interface.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    interface atm slot/port

      4.    atm ether-mac-address interface-name

      5.    atm ether-mac-address mac-address

      6.    end

      7.    show running interface atm slot /port


    DETAILED STEPS
       Command or ActionPurpose
      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 interface atm slot/port


      Example:
      Router(config)# interface atm 1/0.1
       

      Specifies the ATM interface to be configured and enters ATM point-to-point sub-interface mode, where:

      • slot/port--Specifies the location of the interface

       
      Step 4 atm ether-mac-address interface-name


      Example:
      Router(config-subif)# atm ether-mac-address interface fastEthernet 0/0
       

      Specifies the interface name whose MAC address can be used to configure the ATM point-to-point sub-interfaces. This is option 1, skip step 5 if you prefer to specify the interface name and not the MAC address.

      Note   

      Step 4 and step 5 are exclusive of each other.

       
      Step 5 atm ether-mac-address mac-address


      Example:
      Router(config-subif)# atm ether-mac-address 00a1.0b65.87bc
       

      Specifies the user defined or explicit MAC address that can be used to configure the ATM point-to-point sub-interfaces. This is option 2, skip step 4 if you prefer to specify the MAC address and not the interface name.

      Note   

      Step 4 and step 5 are exclusive of each other.

       
      Step 6 end


      Example:
      Router(config-subif)# end
       

      Returns to the privileged EXEC mode.

       
      Step 7 show running interface atm slot /port


      Example:
      Router# show running interface atm0/0.000
       

      Displays the configuration.

       

      Configuration Examples for Reuse MAC for ATM Route-Bridge Encapsulation

      The following example shows how to configure the Reuse MAC for ATM Route-Bridge Encapsulation feature using an interface:

      Router> enable
Router# configure terminal
Router(config)# interface atm 3/0.100 point-to-point
Router(config-subif)# atm ether-mac-address interface fastEthernet 0/0
Router(config-subif)# end

      The following example shows how to configure the Reuse MAC for ATM Route-Bridge Encapsulation feature using an MAC address for the ATM point-to-point sub-interface:

      Router> enable
Router# configure terminal
Router(config)# interface atm 3/0.100 point-to-point
Router(config-subif)# atm ether-mac-address 00a1.0b65.87bc

      Router(config-subif)# end

      3. You can use the show run interface atm slot/port command to display the configuration:

      Router# show run interface atm0/0.000
Current configuration : 188 bytes
!
interface ATM3/0.100 point-to-point
 atm route-bridged ip
 atm ether-mac-address interface FastEthernet0/0
 no atm enable-ilmi-trap
 pvc 1/100
 !
end

      Additional References

      The following sections provide references related to the ATM OAM Ping feature.

      Related Documents

      Related Topic

      Document Title

      Configuring PVCs and mapping a protocol address to a PVC while configuring ATM

      Configuring PVCs section of Cisco IOS Configuring ATM Feature Guide

      Configuring ATM

      Cisco IOS Configuring ATM Feature Guide

      ATM commands, complete command syntax, command mode, command history, defaults, usage guidelines, and examples

      Cisco IOS Asynchronous Transfer Mode Command Reference

      Configuring ATM OAM traffic reduction

      "ATM OAM Traffic Reduction" feature module

      Configuring PVCs with or without OAM

      "Using OAM for PVC Management" sample configuration

      Detecting failures when using OAM cells and PVC management

      Troubleshooting PVC Failures When Using OAM Cells and PVC Management technical note

      Cisco IOS commands

      Cisco IOS Master Commands List, All Releases

      Standards

      Standard

      Title

      ITU-T Specification I.610 (ITU-T specification for B-ISDN operation and maintenance principles and functions).

      I.610 Series I: Integrated Services Digital Network Maintenance principles

      MIBs

      MIB

      MIBs Link

      None

      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

      RFCs

      RFC

      Title

      None

      --

      Technical Assistance

      Description

      Link

      The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

      To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

      Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

      http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

      Feature Information for Reuse MAC for ATM Route-Bridge Encapsulation

      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 Reuse MAC for ATM Route-Bridge Encapsulation

      Feature Name

      Releases

      Feature Information

      Reuse MAC for ATM Route-Bridge Encapsulation

      15.1(1)T

      The Reuse MAC for ATM Route-Bridge Encapsulation feature provides for a configurable MAC address for ATM point-to-point sub-interfaces, with the single VC on each sub-interface that connects each subscriber to the ISP.

      This feature was introduced in Cisco IOS RElease 15.1(1)T. The following commands were introducef: atm ether-mac-address.