Reference Guide

Bidirectional Forwarding Detection | 183
Related configuration tasks
• Changing VRRP session parameters.
• Establishing sessions with OSPF neighbors.
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 11-8. Establishing Sessions with VRRP Neighbors
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.
Step Task Command Syntax Command Mode
1 Establish sessions with all VRRP neighbors. vrrp bfd all-neighbors INTERFACE
fnC0042mp
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F
TOS(config-if-range-gi-4/25)# ip address 2.2.5.1/24
F
TOS(config-if-range-gi-4/25)# no shutdown
F
TOS(config-if-range-gi-4/25)# vrrp-group 1
F
TOS(config-if-range-gi-4/25)# virtual-address 2.2.5.4
F
TOS(config-if-range-gi-4/25)# vrrp bfd all-neighbors
F
TOS(config-if-range-gi-4/25)# vrrp bfd neighbor 2.2.5.2
FTOS(conf-if-gi-2/3)#ip address 2.2.5.2/24
FTOS(config-if-gi-2/3)# no shutdown
FTOS(config-if-range-gi-4/25)# vrrp-group 1
FTOS(config-if-range-gi-4/25)# virtual-address 2.2.5.4
FTOS(config-if-range-gi-4/25)# vrrp bfd all-neighbors
FTOS(config-if-range-gi-4/25)# vrrp bfd neighbor 2.2.5
.1
IP Address: 2.2.5.3
Gateway: 2.2.5.1
R2: MASTER
R1: BACKUP
IP Address: 2.2.5.4
VIRTUAL
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