Administrator Guide

Usage Information
This command provides the flexibility to fine-tune the timer values based on individual interface needs when ISIS
BFD is configured in CONFIGURATION mode. Any timer values specified with this command overrides timers set
using the bfd all-neighbors command. Using the no form of this command does not disable BFD if BFD is
configured in CONFIGURATION mode.
To disable BFD on a specific interface while BFD is configured in CONFIGURATION mode, use the keyword
disable.
neighbor bfd
Explicitly enable or disable a BFD session with a BGP neighbor or a BGP peer group.
Syntax
neighbor {ip-address | ipv6-address | peer-group-name} bfd
Parameters
ip-address Enter the IP address of the BGP neighbor that you want to explicitly enable for BFD
sessions in dotted decimal format (A.B.C.D).
peer-group-name Enter the name of the peer group that you want to explicitly enable for BFD sessions.
Defaults None
Command Modes ROUTER BGP
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC
Networking OS Command Line Reference Guide.
Version Description
9.13(0.0) Introduced support for enabling BFD on non-default VRFs for IPv4 BGP, default, and non-
default VRFs for IPv6 BGP on the S3100 series, S3048–ON, S4048–ON, S4048T-ON,
S5000, S6000, S6000–ON, S6010–ON, S6100–ON, C9010, Z9500, and Z9100–ON.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100-ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.0.2.0 Introduced on the S6000.
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.8.0 Introduced on the S4810.
8.4.1.3 Introduced on the E-Series.
Usage Information
When you enable a BFD session with a specified BGP neighbor or peer group using the bfd neighbor
command, the default BFD session parameters are used (interval: 200 milliseconds, min_rx: 200 milliseconds,
multiplier:
3 packets, and role: active) if you have not specified parameters with the bfd neighbor command.
When you explicitly enable a BGP neighbor for a BFD session with the bfd neighbor command:
• The neighbor does not inherit the global BFD enable values configured with the bfd neighbor command or
configured for the peer group to which the neighbor belongs.
• The neighbor only inherits the global timer values configured with the bfd neighbor command: interval,
min_rx, and multiplier.
Related
Commands
• neighbor bfd disable — disable a BFD session explicitly with a BGP neighbor or a BGP peer group.
324 Bidirectional Forwarding Detection (BFD)