Lists the software, protocol, platform, and neighbor support requirements needed before enabling BFD in different deployment scenarios.
Ensure you are in a user group associated with a task group that includes the proper task IDs. Consult the command reference guides for required task IDs, and contact your AAA administrator if user group assignment prevents command execution.
Implement BFD only when these system and protocol requirements are met:
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Install the required software packages: a composite PIE file including the MPLS package for MPLS, or a Cisco IOS XR IP Unicast Routing Core Bundle image for BGP, IS-IS, Static, and OSPF.
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Activate the Interior Gateway Protocol (IGP) on the router if using IS-IS or OSPF.
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Verify that the neighbor router supports BFD before enabling it for that neighbor.
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Ensure bundle member links meet specific connectivity and state requirements:
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Connect routers on either end of the bundle back-to-back without an intervening Layer 2 switch.
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Establish a BFD session by reaching the LACP Distributing state, configuring EtherChannel, or reaching the Hot Standby and LACP Collecting state.
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