MPLS Layer 2 VPNs Configuration Guide, Cisco IOS XE Release 3S
Xconnect as a Client of BFD
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Xconnect as a Client of BFD

Xconnect as a Client of BFD

The Xconnect as a Client of Bidirectional Forwarding Detection (BFD) feature provides a trigger for redundant pseudowire switchover based on BFD’s fast failure detection capabilities.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and 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 table at the end of this module.

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

Information About Xconnect as a Client of BFD

Xconnect as a Client of BFD

Redundant pseudowires are deployed to provide fault tolerance and resiliency to L2VPN-backhauled connections. The speed at which a system recovers from failures, especially when scaled to large numbers of pseudowires, is critical to many service providers and service level agreements (SLAs). The configuration of a trigger for redundant pseudowire switchover reduces the time that it takes a large number of pseudowires to failover. A fundamental component of bidirectional forwarding detection (BFD) capability is enabled by fast-failure detection (FFD).

The configuration of this feature refers to a BFD configuration, such as the following (the second URL in the bfd map command is the loopback URL in the monitor peer bfd command):

bfd-template multi-hop mh
 interval min-tx 200 min-rx 200 multiplier 3 !
bfd map ipv4  10.1.1.0/24  10.1.1.1/32 mh

How to Configure Xconnect as a Client of BFD

Configuring Xconnect as a Client of BFD

Perform this task to configure a trigger for redundant pseudowire switchover.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    pseudowire-class mpls-ffd

    • Enters pseudowire class configuration mode.

    4.    encapsulation mpls

    5.    monitor peer bfd [local interface interface-type interface-number]


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Device> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Device# configure terminal
     

    Enters global configuration mode.

     
    Step 3 pseudowire-class mpls-ffd
    • Enters pseudowire class configuration mode.


    Example:
    Device(config)# pseudowire-class mpls-ffd
     

    Establishes a pseudowire class for MPLS fast-failure detection.

     
    Step 4 encapsulation mpls


    Example:
    Device(config-pw-class)# encapsulation mpls
     

    Specifies the tunneling encapsulation to be MPLS.

     
    Step 5 monitor peer bfd [local interface interface-type interface-number]


    Example:
    Device(config-pw-class)# monitor peer bfd local interface loopback 0
     

    Enables the pseudowire fast-failure detection capability.

     

    Configuration Examples for Xconnect as a Client of BFD

    Example: Xconnect as a Client of BFD

    Pseudowire Class Configuration

    The following example shows pseudowire fast-failure detection enabled for a pseudowire class:

    pseudowire-class mpls-ffd
     encapsulation mpls
     monitor peer bfd local interface Loopback0

    Template Configuration

    The following example shows pseudowire fast-failure detection enabled in a template:

    template type pseudowire 1
     encapsulation mpls
     monitor peer bfd local interface Ethernet0/1

    Interface Configuration

    The following example shows pseudowire fast-failure detection enabled for an interface:

    interface pseudowire100
     encapsulation mpls
     neighbor 10.10.1.1 21190
     monitor peer bfd local interface Ethernet0/1

    Additional References

    Related Documents

    Related Topic

    Document Title

    Any Transport over MPLS

    Any Transport over MPLS

    High Availability for AToM

    AToM Graceful Restart

    L2VPN Interworking

    L2VPN Interworking

    Layer 2 local switching

    Layer 2 Local Switching

    PWE3 MIB

    Pseudowire Emulation Edge-to-Edge MIBs for Ethernet and Frame Relay Services

    Packet sequencing

    Any Transport over MPLS (AToM) Sequencing Support

    BFD configuration

    IP Routing BFD Configuration Guide

    Standards

    Standards

    Title

    None

    --

    MIBs

    MIBs

    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

    RFCs

    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/​techsupport

    Feature Information for Xconnect as a Client of BFD

    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 www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

    Table 1 Feature Information for Xconnect as a Client of BFD

    Feature Name

    Releases

    Feature Information

    Xconnect as a Client of BFD

    Cisco IOS XE Release 3.8S

    This feature provides fast-failure detection for L2VPN pseudowire redundancy.

    The following command was introduced: monitor peer bfd.