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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)
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