134 | 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 To re-enable BFD on an interface:Configuring BFD for Static RoutesConfiguring BFD for Static Routes is supported on C-Series and E-Series only.BFD gives systems a link state detection mechanism for static routes. With BFD, systems are notified toremove static routes from the routing table as soon as the link state change occurs, rather than having towait until packets fail to reach their next hop.Configuring BFD for static routes is a three-step process:1. Enable BFD globally. See Enabling BFD globally.2. On the local system, establish a session with the next hop of a static route.3. On the remote system, establish a session with the physical port that is the origin of the static route.See Establishing a session on physical ports.Related configuration tasks• Change session parameters.• Disable BFD for all static routes.Establishing sessions for static routesSessions are established for all neighbors that are the next hop of a static route.Figure 7-9. Enabling BFD for Static RoutesStep Task Command Syntax Command Mode1 Enable BFD on an interface. bfd enable INTERFACE2.2.2.1/244/24 2/1 2/2 6/0FTOS(config)# interface gigabitethernet 2/2FTOS(conf-if-gi-2/2)# ip address 2.2.3.1/24FTOS(conf-if-gi-2/2)# no shutdownFTOS(config)# interface gigabitethernet 4/24FTOS(conf-if-gi-4/24)# ip address 2.2.2.1/24FTOS(conf-if-gi-4/24)# no shutdownFTOS(config)# ip route 2.2.3.0/24 2.2.2.2FTOS(config)# ip route bfdFTOS(config)# interface gigabitethernet 6/0FTOS(conf-if-gi-6/0)# ip address 2.2.3.2/24FTOS(conf-if-gi-6/0)# no shutdownFTOS(config)# interface gigabitethernet 2/1FTOS(conf-if-gi-2/1)# ip address 2.2.2.2/24FTOS(conf-if-gi-2/1)# no shutdownFTOS(conf-if-gi-2/1)# bfd neighbor 2.2.2.1R12.2.3.2/242.2.3.1/242.2.2.2/24R2 R3
