Reference Guide

150 | Bidirectional Forwarding Detection (BFD)
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Configuring BFD for VRRP
When using BFD with VRRP, the VRRP protocol registers with the BFD manager on the RPM. BFD
sessions are established with all neighboring interfaces participating in VRRP. If a 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. See Enabling BFD globally on page 132.
2. Establish VRRP BFD sessions with all VRRP-participating neighbors.
3. On the master router, establish a VRRP BFD sessions with the backup routers. See page 150.
Related configuration tasks
• Change session parameters. See page 151.
• Disable or re-enable BFD on an interface. See page 139.
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 9-20. Establishing Sessions with VRRP Neighbors
To establish sessions with all VRRP neighbors:
Step Task Command Syntax Command Mode
1 Establish sessions with all VRRP neighbors.
vrrp bfd all-neighbors
INTERFACE
fnC0042mp
4/25
Force10(config-if-range-gi-4/25)# ip address 2.2.5.1/24
Force10(config-if-range-gi-4/25)# no shutdown
Force10(config-if-range-gi-4/25)# vrrp-group 1
Force10(config-if-range-gi-4/25)# virtual-address 2.2.5.4
Force10(config-if-range-gi-4/25)# vrrp bfd all-neighbors
Force10(config-if-range-gi-4/25)# vrrp bfd neighbor 2.2.5.2
Force10(conf-if-gi-2/3)#ip address 2.2.5.2/24
Force10(config-if-gi-2/3)# no shutdown
Force10(config-if-range-gi-4/25)# vrrp-group 1
Force10(config-if-range-gi-4/25)# virtual-address 2.2.5.4
Force10(config-if-range-gi-4/25)# vrrp bfd all-neighbors
Force10(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
2/3