Service Manual

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 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 [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 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.
Bidirectional Forwarding Detection (BFD) 422