Users Guide

Version Description
8.4.1.3 Introduced BFD for BGP on the E-Series.
8.2.1.0 Introduced BFD for OSPF and ISIS on the E-Series.
7.6.1.0 Introduced BFD for OSPF on the C-Series.
7.5.1.0 Introduced BFD for ISIS on the E-Series.
7.4.1.0 Introduced BFD for OSPF on the E-Series.
Usage Information
All neighbors inherit the timer values configured with the bfd neighbor 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 neighbor command. Likewise, using the no bfd
neighbor command does not disable BFD on an interface if you explicitly enable
BFD using the isis bfd all-neighbors command.
• 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
neighbor
command or configured for the peer group to which a neighbor
belongs. The neighbors inherit only the global timer values (configured with the
bfd neighbor command).
You can only enable BFD for VRRP in INTERFACE command mode (vrrp bfd all-
neighbors
).
Related
Commands
• neighbor bfd disable — disable a BFD session explicitly with a BGP neighbor or a
BGP peer group.
bfd disable
Disable BFD on an interface.
Syntax
bfd disable
Re-enable BFD using the no bfd disable command.
Defaults BFD is disabled by default.
Command Modes VRRP
Command History
This guide is platform-specific. For command information about other platforms, see
the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
Bidirectional Forwarding Detection (BFD) 419