Configure Bfd For Bgp - Dell C9000 Series Networking Configuration Manual

Disabling BFD for IS-IS
If you disable BFD globally, all sessions are torn down and sessions on the remote system are placed in a
Down state.
If you disable BFD on an interface, sessions on the interface are torn down and sessions on the remote
system are placed in a Down state. Disabling BFD does not trigger a change in BFD clients; a final Admin
Down packet is sent before the session is terminated.
To disable BFD sessions, use the following commands.
• Disable BFD sessions with all IS-IS neighbors.
ROUTER-ISIS mode
no bfd all-neighbors
• Disable BFD sessions with IS-IS neighbors on a single interface.
INTERFACE mose
isis bfd all-neighbors disable

Configure BFD for BGP

In a BGP core network, BFD provides rapid detection of communication failures in BGP fast-forwarding paths
between internal BGP (iBGP) and external BGP (eBGP) peers for faster network reconvergence. BFD for BGP is
supported on 1GE, 10GE, 40GE, port-channel, and VLAN interfaces. BFD for BGP does not support IPv6 and
the BGP multihop feature.
Prerequisites
Before configuring BFD for BGP, you must first configure the following settings:
1 Configure BGP on the routers that you want to interconnect, as described in
Border Gateway Protocol IPv4
2 Enable fast fall-over for BGP neighbors to reduce convergence time (the neighbor fall-over
command), as described in
Establishing Sessions with BGP Neighbors
Before configuring BFD for BGP, you must first configure BGP on the routers that you want to interconnect.
For more information, refer to
(BGPv4).
BGP Fast Fall-Over.
Border Gateway Protocol IPv4 (BGPv4).
Bidirectional Forwarding Detection (BFD) 180