150 | Bidirectional Forwarding Detection (BFD)w w w . d e l l . c o m | s u p p o r t . d e l l . c o m Configuring BFD for VRRPBFD for VRRP is only supported on platforms: e cWhen using BFD with VRRP, the VRRP protocol registers with the BFD manager on the RPM. BFDsessions are established with all neighboring interfaces participating in VRRP. If a neighboring interfacefails, the BFD agent on the line card notifies the BFD manager, which in turn notifies the VRRP protocolthat a link state change occurred.Configuring BFD for VRRP is a three-step process:1. Enable BFD globally. See 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.Related configuration tasks• Change session parameters.• Disable or re-enable BFD on an interface.Establishing sessions with all VRRP neighborsBFD sessions can be established for all VRRP neighbors at once, or a session can be established with aparticular neighbor.Figure 7-22. Establishing Sessions with VRRP NeighborsfnC0042mp4/25FTOS(config-if-range-gi-4/25)# ip address 2.2.5.1/24FTOS(config-if-range-gi-4/25)# no shutdownFTOS(config-if-range-gi-4/25)# vrrp-group 1FTOS(config-if-range-gi-4/25)# virtual-address 2.2.5.4FTOS(config-if-range-gi-4/25)# vrrp bfd all-neighborsFTOS(config-if-range-gi-4/25)# vrrp bfd neighbor 2.2.5.2FTOS(conf-if-gi-2/3)#ip address 2.2.5.2/24FTOS(config-if-gi-2/3)# no shutdownFTOS(config-if-range-gi-4/25)# vrrp-group 1FTOS(config-if-range-gi-4/25)# virtual-address 2.2.5.4FTOS(config-if-range-gi-4/25)# vrrp bfd all-neighborsFTOS(config-if-range-gi-4/25)# vrrp bfd neighbor 2.2.5.1IP Address: 2.2.5.3Gateway: 2.2.5.1R2: MASTERR1: BACKUPIP Address: 2.2.5.4VIRTUAL2/3
