Administrator Guide

bfd protocol-liveness
Enable the BFD protocol liveness feature.
Syntax
bfd protocol-liveness
Defaults Disabled
Command Modes CONFIGURATION
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
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.8(2.0) Introduced on the S3100 series.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.2(1.0) Introduced on the Z9500.
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.10.0 Introduced on the S4810.
7.4.1.0 Introduced on the E-Series.
Usage
Information
Protocol Liveness is a feature that notifies the BFD Manager when a client protocol (for example,
OSPF and ISIS) is disabled. When a client is disabled, all BFD sessions for that protocol are torn down.
Neighbors on the remote system receive an Admin Down control packet and are placed in the Down state.
Peer routers might take corrective action by choosing alternative paths for the routes that originally
pointed to this router.
ip route bfd
Enable BFD for all neighbors configured through static routes.
Syntax
ip route bfd [vrf vrf-name] [prefix-list prefix-list-name] [interval
interval min_rx min_rx multiplier value role {active | passive}]
To disable BFD for all neighbors configured through static routes, use the no ip route bfd [vrf
vrf-name] [prefix-list prefix-list-name] [interval interval min_rx min_rx
multiplier value role {active | passive}] command.
Parameters
vrf vrf-name Enter the keyword vrf and then the name of the VRF.
prefix-list prefix-
list-name
(Optional) Enter the keyword prefix-list followed by the name of the prefix
list to enable or disable BFD on specific neighbors.
interval
milliseconds
(OPTIONAL) Enter the keywords interval to specify non-default BFD session
parameters beginning with the transmission interval. The range is from 50 to 1000.
The default is 200.
min_rx
milliseconds
Enter the keywords min_rx to specify the minimum rate at which the local system
receives control packets from the remote system. The range is from 50 to 1000.
The default is 200.
multiplier value Enter the keywords multiplier to specify the number of packets that must be
missed in order to declare a session down. The range is from 3 to 50. The default is
3.
Bidirectional Forwarding Detection (BFD) 313