170 | 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 port-channels is a two-step process:1. Enabling BFD globally.2. Establishing sessions on port-channels.Related configuration tasks• Disabling BFD for port-channels.Establishing sessions on port-channelsTo establish a session, BFD must be enabled at interface level on both ends of the link, as shown in theexample below. The session parameters do not need to match.Disabling BFD for port-channelsIf BFD is disabled on an interface, sessions on the interface are torn down. A final Admin Down controlpacket is sent to all neighbors, and sessions on the remote system are placed in a Down state (Message 3).To disable BFD for a port-channel:Step Task Command Syntax Command Mode1 Disable BFD for a port-channel. no bfd enable INTERFACE PORT-CHANNELfnC0044mp4/24FTOS(config-if-range-gi-4/24-5)# port-channel-protocol lacpFTOS(config-if-range-gi-4/24-5)# port-channel 1 mode activeFTOS(config-if-range-gi-4/24-5)# no shutdownFTOS(config-if-range-gi-4/24-5)# interface port-channel 1FTOS(config-if-po-1)# ip address 2.2.2.1/24FTOS(config-if-po-1)# no shutdownFTOS(config-if-po-1)# bfd neighbor 2.2.2.22/14/25 2/2Port Channel 14/244/25FTOS(config-if-range-gi-2/1-2)# port-channel-protocol lacpFTOS(config-if-range-gi-2/1-2)# port-channel 1 mode activeFTOS(config-if-range-gi-2/1-2)# no shutdownFTOS(config-if-range-gi-2/1-2)# interface port-channel 1FTOS(config-if-po-1)# ip address 2.2.2.2/24FTOS(config-if-po-1)# no shutdownFTOS(config-if-po-1)# bfd neighbor 2.2.2.1
