Reference Guide

Bidirectional Forwarding Detection (BFD) | 147
To establish sessions with all VRRP 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. Therefore, VRRP BFD sessions on the backup router cannot change to the UP state. The
master router must be configured to establish an individual VRRP session the backup router.
To establish a session with a particular VRRP neighbor:
View the established sessions using the command
show bfd neighbors, as shown in the following example.
Figure 7-23. Viewing Established Sessions for VRRP Neighbors
Session state information is also shown in the show vrrp command output, as shown in the following
example.
Step Task Command Syntax Command Mode
1 Establish sessions with all VRRP neighbors. vrrp bfd all-neighbors INTERFACE
Step Task Command Syntax Command Mode
1 Establish a session with a particular VRRP
neighbor.
vrrp bfd neighbor ip-address INTERFACE
R1(conf-if-gi-4/25)#vrrp bfd all-neighbors
R1(conf-if-gi-4/25)#do show bfd neighbor
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
V - VRRP
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
* 2.2.5.1 2.2.5.2 Gi 4/25 Down 1000 1000 3 V
VRRP BFD Sessions