Concept Guide

CONFIGURATION mode
ip route bfd [prefix-list prefix-list-name] interval milliseconds min_rx milliseconds
multiplier value role [active | passive]
To view session parameters, use the show bfd neighbors detail command.
Disabling BFD for Static Routes
If you disable BFD, all static route BFD sessions are torn down.
A nal Admin Down packet is sent to all neighbors on the remote systems, and those neighbors change to the Down state.
To disable BFD for static routes, use the following command.
• Disable BFD for static routes.
CONFIGURATION mode
no ip route bfd [prefix-list prefix-list-name] [interval interval min_rx min_rx multiplier
value role {active | passive}]
Congure BFD for IPv6 Static Routes
BFD oers systems a link state detection mechanism for static routes. With BFD, systems are notied to remove static routes from the
routing table as soon as the link state change occurs, rather than waiting until packets fail to reach their next hop.
Conguring BFD for IPv6 static routes is a three-step process:
1 Enable BFD globally.
2 Congure static routes on both routers on the system (either local or remote).
3 Congure an IPv6 route to connect BFD on the static routes using the ipv6 route bfd command.
Related Conguration Tasks
• Changing IPv6 Static Route Session Parameters
• Disabling BFD for Static Routes
Establishing Sessions for IPv6 Static Routes for Default VRF
Sessions are established for all neighbors that are the next hop of a static route on the default VRF.
To establish a BFD session, use the following command.
• Establish BFD sessions for all IPv6 neighbors that are the next hop of a static route.
CONFIGURATION mode
ipv6 route bfd [prefix-list prefix-list-name] [interval interval min_rx min_rx multiplier
value role {active | passive}]
Example of the show bfd neighbors Command to Verify Static Routes
To verify that sessions have been created for static routes, use the show bfd neighbors command.
R1(conf)#ipv6 route 11::1 11::2
R1(conf)#ipv6 route bfd
R1(conf)#do show bfd neighbors
* - Active session role
Ad Dn - Admin Down
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Bidirectional Forwarding Detection (BFD)