Users Guide

Table Of Contents
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 final 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
Configure 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.
bfd all-neighbors
ROUTER-OSPFv3 Mode
4. Enter INTERFAC E CONFIGURATION mode.
interface interface-name
CONFIGURATION Mode
5. Establish BFD sessions with OSPFv3 neighbors corresponding to a single OSPF interface.
ipv6 ospf bfd all-neighbors
INTERFACE CONFIGURATION Mode
Establishing BFD sessions with OSPFv3 neighbors in a non-default VRF instance
To establish BFD sessions with OSPFv3 neighbors in a non-default VRF instance:
1. Enable BFD globally
bfd enable
CONFIGURATION Mode
2. Enter INTERFACE CONFIGURATION mode
interface interface-name
502
Layer 3