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Contents
The BFD for RIPv2 Support feature is used to facilitate an alternate path selection when a neighboring router is inactive.
Routing Information Protocol (RIP) uses the timeout of prefixes of a particular neighbor to identify if a neighbor is inactive. By default, the timeout is 180 seconds; that is, although the next-hop router is inactive, the RIP router will still broadcast prefixes for up to 180 seconds.
Bidirectional Forward Detection (BFD) is a protocol that provides subsecond failure detection using a single, common standardized mechanism that is independent of media and routing protocols.
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.
BFD is independent of RIPv2 and must be enabled and functional on the router.
Perform this task toconfigure BFD on RIPv2 neighbors:
1.
enable
2.
configure
terminal
3.
router
rip
4.
bfd
all-interfaces
5.
end
The following example shows how to configure BFD for all interfaces associated with a RIPv2 neighbor:
! interface GigabitEthernet 0/0/0 ip address 10.10.10.1 255.255.255.0 bfd interval 50 min_rx 50 multiplier 5 end ! interface GigabitEthernet 0/0/1 ip address 10.10.20.1 255.255.255.0 bfd interval 50 min_rx 50 multiplier 5 end ! router rip version 2 redistribute connected network 10.0.0.0 neighbor 10.10.20.2 bfd bfd all-interfaces no auto-summary !
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Cisco IOS commands |
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Cisco IOS IP Routing: Protocol-Independent Commands |
Cisco IOS IP Routing: Protocol-Independent Command Reference |
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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 |
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.
Feature Name |
Releases |
Feature Information |
---|---|---|
BFD for RIPv2 Support |
Cisco IOS Release 15.1(2)S Cisco IOS Release 15.3(2)T |
The BFD for RIPv2 Support feature is used to facilitate alternate path selection when a neighboring router is inactive. The following commands were introduced or modified: bfd all-interfaces, debug ip rip bfd events, neighbor (RIP),and show ip rip neighbor. |