IP Routing: BFD Configuration Guide, Cisco IOS Release 15M&T
OSPFv3 for BFD
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OSPFv3 for BFD

The Bidirectional Forwarding Detection protocol supports OSPFv3.

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 OSPFv3 for BFD

The Bidirectional Forwarding Detection (BFD) protocol supports Open Shortest Path First version 3 (OSPFv3).

How to Configure OSPFv3 for BFD

Configuring BFD Support for OSPFv3

This section describes the procedures for configuring BFD support for OSPFv3, so that OSPFv3 is a registered protocol with BFD and will receive forwarding path detection failure messages from BFD. You can either configure BFD support for OSPFv3 globally on all interfaces or configure it selectively on one or more interfaces.

There are two methods for enabling BFD support for OSPFv3:

  • You can enable BFD for all of the interfaces for which OSPFv3 is routing by using the bfd all-interfaces command in router configuration mode. You can disable BFD support on individual interfaces using the ipv6 ospf bfd disable command in interface configuration mode.
  • You can enable BFD for a subset of the interfaces for which OSPFv3 is routing by using the ipv6 ospf bfd command in interface configuration mode.

Note

OSPF will only initiate BFD sessions for OSPF neighbors that are in the FULL state.

Configuring Baseline BFD Session Parameters on the Interface

Repeat this task for each interface over which you want to run BFD sessions to BFD neighbors.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    interface type number

    4.    bfd interval milliseconds min_rx milliseconds multiplier interval-multiplier


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 interface type number


    Example:
    Device(config)# interface GigabitEthernet 0/0/0
     

    Specifies an interface type and number, and places the device in interface configuration mode.

     
    Step 4 bfd interval milliseconds min_rx milliseconds multiplier interval-multiplier


    Example:
    Device(config-if)# bfd interval 50 min_rx 50 multiplier 5
     

    Enables BFD on the interface.

     

    Configuring BFD Support for OSPFv3 for All Interfaces

    Before You Begin

    OSPFv3 must be running on all participating devices. The baseline parameters for BFD sessions on the interfaces over which you want to run BFD sessions to BFD neighbors must be configured.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    ipv6 router ospf process-id [vrf vpn-name]

      4.    bfd all-interfaces

      5.    exit

      6.    show bfd neighbors [vrf vrf-name] [client {bgp | eigrp | isis | ospf | rsvp | te-frr}] [ip-address | ipv6 ipv6-address] [details]

      7.    show ipv6 ospf [process-id] [area-id] [rate-limit]


    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 ipv6 router ospf process-id [vrf vpn-name]


      Example:
      Device(config)# ipv6 router ospf 2
       

      Configures an OSPFv3 routing process.

       
      Step 4 bfd all-interfaces


      Example:
      Device(config-router)# bfd all-interfaces
       

      Enables BFD for all interfaces participating in the routing process.

       
      Step 5 exit


      Example:
      Device(config-router)# exit
       

      Enter this command twice to go to privileged EXEC mode.

       
      Step 6 show bfd neighbors [vrf vrf-name] [client {bgp | eigrp | isis | ospf | rsvp | te-frr}] [ip-address | ipv6 ipv6-address] [details]


      Example:
      Device# show bfd neighbors detail
       

      (Optional) Displays a line-by-line listing of existing BFD adjacencies.

       
      Step 7 show ipv6 ospf [process-id] [area-id] [rate-limit]


      Example:
      Device# show ipv6 ospf
       

      (Optional) Displays general information about OSPFv3 routing processes.

       

      Configuring BFD Support for OSPF for One or More Interfaces

      To configure BFD on one or more OSPF interfaces, perform the steps in this section.

      Before You Begin

      OSPF must be running on all participating routers.

      The baseline parameters for BFD sessions on the interfaces over which you want to run BFD sessions to BFD neighbors must be configured. See the Configuring BFD Session Parameters on the Interface section for more information.


      Note

      Output from the show bfd neighbors details command shows the configured intervals. The output does not show intervals that were changed because hardware-offloaded BFD sessions were configured with Tx and Rx intervals that are not multiples of 50 ms.

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    interface type number

        4.    ip ospf bfd [disable]

        5.    end

        6.    show bfd neighbors [details]

        7.    show ip ospf


      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 type number


        Example:
        Router(config)# interface fastethernet 6/0
         

        Enters interface configuration mode.

         
        Step 4 ip ospf bfd [disable]


        Example:
        Router(config-if)# ip ospf bfd
         

        Enables or disables BFD on a per-interface basis for one or more interfaces associated with the OSPF routing process.

        Note   

        You should use the disable keyword only if you enabled BFD on all of the interfaces that OSPF is associated with using the bfd all-interfaces command in router configuration mode.

         
        Step 5 end


        Example:
        Router(config-if)# end
         

        Exits interface configuration mode and returns the router to privileged EXEC mode.

         
        Step 6 show bfd neighbors [details]


        Example:
        Router# show bfd neighbors details
         

        (Optional) Displays information that can help verify if the BFD neighbor is active and displays the routing protocols that BFD has registered.

        Note   

        In order to display the full output of the show bfd neighbors details command on a Cisco 12000 series router, you must enter the command on the line card. Enter the attach slot-number command to establish a CLI session with a line card. The registered protocols are not shown in the output of the show bfd neighbors details command when it is entered on a line card.

        Note   

        If hardware-offloaded BFD sessions are configured with Tx and Rx intervals that are not multiples of 50 ms, the hardware intervals are changed. However, output from the show bfd neighbors details command will show the configured intervals, not the changed ones.

         
        Step 7 show ip ospf


        Example:
        Router# show ip ospf
         

        (Optional) Displays information that can help verify if BFD support for OSPF has been enabled.

         

        Retrieving BFDv6 Information for Monitoring and Troubleshooting

        SUMMARY STEPS

          1.    enable

          2.    monitor event ipv6 static [enable | disable]

          3.    show ipv6 static [ipv6-address | ipv6-prefix/prefix-length] [interface type number | recursive] [vrf vrf-name] [bfd] [detail

          4.    show ipv6 static [ipv6-address | ipv6-prefix/prefix-length] [interface type number | recursive] [vrf vrf-name] [bfd] [detail]

          5.    debug ipv6 static


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example:
          Device> enable
           

          Enables privileged EXEC mode.

          • Enter your password if prompted.
           
          Step 2 monitor event ipv6 static [enable | disable]


          Example:
          Device# monitor event ipv6 static enable
           

          Enables the use of event trace to monitor the operation of the IPv6 static and IPv6 static BFDv6 neighbors.

           
          Step 3 show ipv6 static [ipv6-address | ipv6-prefix/prefix-length] [interface type number | recursive] [vrf vrf-name] [bfd] [detail


          Example:
          Device# show ipv6 static vrf vrf1 detail
           

          Displays the BFDv6 status for a static route associated with a static BFDv6 neighbor.

           
          Step 4 show ipv6 static [ipv6-address | ipv6-prefix/prefix-length] [interface type number | recursive] [vrf vrf-name] [bfd] [detail]


          Example:
          Device# show ipv6 static vrf vrf1 bfd
           

          Displays static BFDv6 neighbors and associated static routes.

           
          Step 5 debug ipv6 static


          Example:
          Device# debug ipv6 static
           

          Enables BFDv6 debugging.

           

          Configuration Examples for OSPFv3 for BFD

          Example: Displaying OSPF Interface Information about BFD

          The following display shows that the OSPF interface is enabled for BFD: 

          Device# show ipv6 ospf interface 

Serial10/0 is up, line protocol is up 
  Link Local Address FE80::A8BB:CCFF:FE00:6500, Interface ID 42 
  Area 1, Process ID 1, Instance ID 0, Router ID 10.0.0.1 
  Network Type POINT_TO_POINT, Cost: 64 
  Transmit Delay is 1 sec, State POINT_TO_POINT, BFD enabled 
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 
    Hello due in 00:00:07 
  Index 1/1/1, flood queue length 0 
  Next 0x0(0)/0x0(0)/0x0(0) 
  Last flood scan length is 1, maximum is 1 
  Last flood scan time is 0 msec, maximum is 0 msec 
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.1.0.1
  Suppress hello for 0 neighbor(s)

          Additional References

          Related Documents

          Related Topic

          Document Title

          IPv6 addressing and connectivity

          Cisco IOS IPv6 Configuration Guide

          Cisco IOS commands

          Cisco IOS Master Commands List, All Releases

          IPv6 commands

          Cisco IOS IPv6 Command Reference

          Cisco IOS IPv6 features

          Cisco IOS IPv6 Feature Mapping

          OSPFv3 for BFD

          “Bidirectional Forwarding Detection” module

          Standards and RFCs

          Standard/RFC

          Title

          RFCs for IPv6

          IPv6 RFCs

          MIBs

          MIB

          MIBs Link

          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

          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 OSPFv3 for 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 OSPFv3 for BFD

          Feature Name

          Releases

          Feature Information

          OSPFv3 for BFD

          15.1(2)T

          12.2(33)SRE

          15.0(1)SY

          BFD supports the dynamic routing protocol OSPFv3.

          The following commands were introduced or modified: bfd, bfd all-interfaces, debug bfd, ipv6 router ospf, show bfd neighbors, show ipv6 ospf, show ipv6 ospf interface, show ospfv3, show ospfv3 interface.