Administrator Guide

Version Description
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 noties 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 congured through static routes.
Syntax
ip route bfd [prefix-list prefix-list-name] [interval interval min_rx min_rx
multiplier value role {active | passive}]
To disable BFD for all neighbors congured through static routes, use the no ip route bfd [prefix-list
prefix-list-name] [interval interval min_rx min_rx multiplier value role
{active | passive}] command.
Parameters
prex-list prex-list-
name
(Optional) Enter the keyword prefix-list followed by the name of the prex list to
enable or disable BFD on specic 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.
role [active |
passive]
Enter the role that the local system assumes:
• Active — active system initiates the BFD session. Both systems can be active for
the same session.
• Passive — passive system does not initiate a session. It only responds to a request
for session initialization from the active system.
The default is Active.
Defaults See Parameters.
Command Modes CONFIGURATION
332 Bidirectional Forwarding Detection (BFD)