Reference Guide

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.
S4820T
Syntax
ip route bfd [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 [interval interval min_rx min_rx multiplier value role
{active | passive}]
command.
Parameters
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
100.
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 100.
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 — The active system initiates the BFD session. Both
systems can be active for the same session.
• Passive — The 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
Command History
Version 9.2.(0.0) Introduced on Z9000, S4810, and S4820T.
Version 8.2.1.0 Introduced on the E-Series ExaScale.
Version 7.6.1.0 Introduced on the C-Series.
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