Connectivity Guide

To change parameters for all OSPFv2 sessions or for OSPF sessions on a single interface, use the following commands:
1 Change parameters for OSPF sessions.
bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active |
passive]
ROUTER-OSPF Mode
2 Change parameters for all OSPF sessions on an interface.
ip ospf bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role
[active | passive]
INTERFACE CONFIGURATION Mode
Disabling BFD for OSPFv2
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:
1 Disable BFD sessions with all OSPF neighbors.
no bfd all-neighbors
ROUTER-OSPF Mode
2 Disable OSPFv2 at interface level using the following command:
ip ospf bfd all-neighbors disable
INTERFACE CONFIGURATION Mode
To re-enable BFD, disabled the interface alone using the following commands:
• no ip ospf bfd all-neighbors command
• ip ospf bfd all-neighbors
Congure BFD for OSPFv3
BFD for OSPFv3 provides support for IPv6:
1 Enable BFD Globally.
2 Establish sessions with OSPFv3 neighbors.
Establishing BFD sessions with OSPFv3 neighbors
To establish BFD sessions with OSPFv3 neighbors:
1 Enable BFD globally
bfd enable
CONFIGURATION Mode
2 Enter ROUTER-OSPF mode
router ospfv3 ospfv3-instance
CONFIGURATION
3 Establish sessions with all OSPFv3 neighbors.
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