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Version Description
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 [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
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.
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
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
9.13(0.0) Introduced the vrf keyword on S3100 series, S3048–ON, S4048–ON, S4048T-
ON, S5000, S6000, S6000–ON, S6010–ON, S6100–ON, C9010, Z9500, and
Z9100–ON.
9.12(1.0) Introduced on the S5048F–ON.
9.11(2.5) Introduced the vrf keyword on the Z9100–ON.
Bidirectional Forwarding Detection (BFD) 329