IP Routing: BGP Configuration Guide, Cisco IOS Release 15S

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Book Title

IP Routing: BGP Configuration Guide, Cisco IOS Release 15S

Chapter Title

BGP IPv6 PIC Edge and Core for IP/MPLS

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Updated:
July 31, 2014

Chapter: BGP IPv6 PIC Edge and Core for IP/MPLS

BGP IPv6 PIC Edge and Core for IP/MPLS

The BGP IPv6 PIC Edge and Core for IP/MPLS feature improves convergence for both core and edge failures after a network failure.

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 BGP IPv6 IPC Edge and Core for IP/MPLS

BGP IPv6 PIC Edge for IP MPLS

The BGP IPv6 PIC Edge for IP MPLS feature improves convergence for both core and edge failures after a network failure. The BGP IPv6 PIC edge for IP MPLS feature creates and stores a backup or alternate path in the Routing Information Base (RIB), the Forwarding Information Base (FIB), and in Cisco Express Forwarding, so that the backup or alternate path can immediately take over wherever a failure is detected, thus enabling fast failover.

How to Configure BGP IPv6 PIC Edge and Core for IP/MPLS

Configuring BGP IPv6 PIC Edge for IP MPLS

Because many service provider networks contain many VRFs, the BGP PIC feature allows you to configure BGP PIC feature for all VRFs at once. Performing this task in IPv6 address family configuration mode protects IPv6 VRFs.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    router bgp autonomous-system-number

    4.    address-family ipv6 [vrf vrf-name] [unicast | multicast | vpnv6]

    5.    bgp additional-paths install

    6.    bgp recursion host


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 router bgp autonomous-system-number


    Example:
    Device(config)# router bgp 100
     

    Configures the BGP routing process.

     
    Step 4 address-family ipv6 [vrf vrf-name] [unicast | multicast | vpnv6]


    Example:
    Device(config-router)# address-family ipv6 vrf_pic
     

    Specifies a VRF table named vrf_pic, and enters IPv6 address family configuration mode.

     
    Step 5 bgp additional-paths install


    Example:
    Device(config-router-af)# bgp additional-paths install
     

    Calculates a backup path and installs it into the RIB and Cisco Express Forwarding.

     
    Step 6 bgp recursion host


    Example:
    Device(config-router-af)# bgp recursion host
     

    Enables the recursive-via-host flag for IPv6 address families.

     

    Additional References

    Related Documents

    Related Topic

    Document Title

    Cisco IOS commands

    Cisco IOS Master Commands List, All Releases

    BGP commands

    Cisco IOS IP Routing: BGP Command Reference

    BGP PIC Edge for IP and MPLS-VPN

    “BGP PIC Edge for IP and MPLS-VPN” module in the IP Routing: BGP Configuration Guide

    Technical Assistance

    Description

    Link

    The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

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

    Feature Information for BGP IPv6 PIC Edge and Core for IP/MPLS

    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 BGP IPv6 PIC Edge and Core for IP/MPLS

    Feature Name

    Releases

    Feature Information

    BGP IPv6 PIC Edge and Core for IP/MPLS

    Cisco IOS XE Release 3.3S

    15.2(3)T

    15.2(4)S

    The BGP IPv6 PIC Edge and Core for IP/MPLS feature improves convergence for both core and edge failures after a network failure.

    The following commands were modified: bgp additional-paths install, bgp advertise-best-external, bgp recursion host.

    In Cisco IOS Release 15.2(4)S, support was added for the Cisco 7200 series router.

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