Users Guide

Version Description
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 [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
[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 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 — 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 Description
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.
9.3.(0.0) Introduced on S6000.
9.2(1.0) Introduced on the Z9500.
338
Bidirectional Forwarding Detection (BFD)