Administrator Guide

Conguring BFD for OSPFv3 is a two-step process:
1. Enable BFD globally.
2. Establish sessions with OSPFv3 neighbors.
Related Conguration Tasks
• Changing OSPFv3 Session Parameters
• Disabling BFD for OSPFv3
Establishing Sessions with OSPFv3 Neighbors
You can establish BFD sessions with all OSPFv3 neighbors at once or with all neighbors out of a specic interface. Sessions are only
established when the OSPFv3 adjacency is in the Full state.
To establish BFD with all OSPFv3 neighbors or with OSPFv3 neighbors on a single interface, use the following commands.
• Establish sessions with all OSPFv3 neighbors.
ROUTER-OSPFv3 mode
bfd all-neighbors
• Establish sessions with OSPFv3 neighbors on a single interface.
INTERFACE mode
ipv6 ospf bfd all-neighbors
To view the established sessions, use the show bfd neighbors command.
Changing OSPFv3 Session Parameters
Congure BFD sessions with default intervals and a default role.
The parameters that you can congure are: desired tx interval, required min rx interval, detection
multiplier
, and system role. Congure these parameters for all OSPFv3 sessions or all OSPFv3 sessions on a particular
interface. If you change a parameter globally, the change aects all OSPFv3 neighbors sessions. If you change a parameter at the
interface level, the change aects all OSPFv3 sessions on that interface.
To change parameters for all OSPFv3 sessions or for OSPFv3 sessions on a single interface, use the following commands.
To view session parameters, use the show bfd neighbors detail command, as shown in the example in Displaying BFD for
BGP Information.
• Change parameters for all OSPFv3 sessions.
ROUTER-OSPFv3 mode
bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active
| passive]
• Change parameters for OSPFv3 sessions on a single interface.
INTERFACE mode
ipv6 ospf bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value
role [active | passive]
Disabling BFD for OSPFv3
If you disable BFD globally, all sessions are torn down and sessions on the remote system are placed in a Down state.
If you disable BFD on an interface, sessions on the interface are torn down and sessions on the remote system are placed in a Down
state. Disabling BFD does not trigger a change in BFD clients; a nal Admin Down packet is sent before the session is terminated.
To disable BFD sessions, use the following commands.
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Bidirectional Forwarding Detection (BFD)