Reference Guide

Bidirectional Forwarding Detection (BFD) | 289
Usage
Information
All neighbors inherit the timer values configured with the bfd all-neighbors
command except in the following cases:
• Timer values configured with the isis bfd all-neighbors or ip ospf bfd
all-neighbors commands in INTERFACE mode override timer values configured
with the bfd all-neighbors command. Likewise, using the no bfd all-neighbors
command does not disable BFD on an interface if BFD is explicitly enabled
using the command isis bfd all-neighbors.
• Neighbors that have been explicitly enabled or disabled for a BFD session with
the bfd neighbor or neighbor bfd disable commands in ROUTER BGP mode do
not inherit the global BFD enable/disable values configured with the bfd
all-neighbors command or configured for the peer group to which a neighbor
belongs. The neighbors inherit only the global timer values (configured with the
bfd all-neighbors command).
Related
Commands
bfd disable
c e
Disable all VRRP sessions in a VRRP group.
Syntax bfd disable
Re-enable BFD using the command no bfd disable.
Defaults
BFD is disabled by default.
Command Modes
INTERFACE VRRP
Command
History
bfd enable (Configuration)
c e
Enable BFD on all interfaces.
Syntax bfd enable
Disable BFD using the no bfd enable command.
show bfd neighbors Display BFD neighbor information on all interfaces or a specified
interface.
bfd neighbor Explicitly enable a BFD session with a BGP neighbor or a BGP peer
group.
neighbor bfd disable Explicitly disable a BFD session with a BGP neighbor or a BGP peer
group.
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on C-Series
Version 7.5.1.0 Introduced on E-Series