neighboring interface fails, the BFD agent on the line card notifies the BFD manager, which in turn
notifies the VRRP protocol that a link state change occurred.
Configuring BFD for VRRP is a three-step process:
1. Enable BFD globally. Refer to Enabling BFD Globally.
2. Establish VRRP BFD sessions with all VRRP-participating neighbors.
3. On the master router, establish a VRRP BFD sessions with the backup routers. Refer to Establishing
Sessions with All VRRP Neighbors.
Related Configuration Tasks
Changing VRRP Session Parameters.
Disabling BFD for VRRP.
Establishing Sessions with All VRRP Neighbors
BFD sessions can be established for all VRRP neighbors at once, or a session can be established with a
particular neighbor.
Figure 16. Establishing Sessions with All VRRP Neighbors
To establish sessions with all VRRP neighbors, use the following command.
Establish sessions with all VRRP neighbors.
INTERFACE mode
vrrp bfd all-neighbors
Bidirectional Forwarding Detection (BFD) 159