Bi–directional forwarding detection (BFD)
Bi-directional Forwarding Detection (BFD) is a protocol used to quickly locate hardware failures in the network. Routers running BFD send packets to each other at a negotiated rate. If packets from a BFD-protected router fail to arrive, then that router is declared down. BFD communicates this information to the routing protocol and the routing information is updated.
BFD neighbors establish if BFD is enabled in OSPF or BFP routers that establish as neighbors. The CLI commands associated with BFD include:
config router bgp
config neighbor set bfd
config router ospf set bfd
config system settings set bfd
set bfd-desired-min-tx set bfd-required-min-rx set bfd-detect-mult
set bfd-dont-enforce-src-port end
Per-interface (override) configuration:
config system interface edit <interface_name>
set bfd enable
set bfd-desired-min-tx set bfd-detect-mult
set bfd-required-min-rx end
For more information about BFD in BGP, see Border Gateway Protocol (BGP) on page 338.
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