Concept Guide

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.
Establishing BFD Sessions with OSPFv3 Neighbors for
nondefault VRFs
To congure BFD in a nondefault VRF, use the following procedure:
• Enable BFD globally.
CONFIGURATION mode
bfd enable
• Establish sessions with all OSPFv3 neighbors in a specic VRF.
ROUTER-OSPFv3 mode
bfd all-neighbors
• Establish sessions with the OSPFv3 neighbors on a single interface in a specic VRF.
INTERFACE mode
ipv6 ospf bfd all-neighbors
• To disable BFD on a specic OSPFv3 enabled interface, use the ipv6 ospf bfd all-neighbors disable command. You can
also use the no bfd enable command to disable BFD on a specic interface.
NOTE
: You can create upto a maximum of 128 BFD sessions (combination of OSPFv2 and OSPFv3 with a timer of 300*300*3)
for both default and nondefault VRFs.
The following example shows the conguration to establish sessions with all OSPFv3 neighbors in a specic VRF:
ipv6 router ospf 20 vrf vrf1
bfd all-neighbors
!
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Bidirectional Forwarding Detection (BFD)