Service Manual
Congure BFD for VRRP
When using BFD with VRRP, the VRRP protocol registers with the BFD manager on the route processor module (RPM). BFD
sessions are established with all neighboring interfaces participating in VRRP. If a neighboring interface fails, the BFD agent on the
line card noties the BFD manager, which in turn noties the VRRP protocol that a link state change occurred.
Conguring 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 Conguration 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 20. 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
Establishing VRRP Sessions on VRRP Neighbors
The master router does not care about the state of the backup router, so it does not participate in any VRRP BFD sessions.
VRRP BFD sessions on the backup router cannot change to the UP state. Congure the master router to establish an individual
VRRP session the backup router.
Bidirectional Forwarding Detection (BFD)
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