address-family ipv4 unicast (BFD)
To enable Bidirectional Forwarding Detection (BFD) fast-detection on a specific IPV4 unicast destination address prefix and on the forwarding next-hop address, use the address-family ipv4 unicast command in static route configuration mode. To return the router to the default setting, use the no form of this command.
address-family ipv4 unicast address nexthop bfd fast-detect [minimum interval interval] [multiplier multiplier]
no address-family ipv4 unicast address nexthop bfd fast-detect [minimum interval interval] [multiplier multiplier]
Syntax Description
address |
Specifies the IPv4 unicast destination address and prefix on which to enable BFD fast-detection. |
nexthop |
Specifies the next-hop address on which to enable BFD fast-detection. |
bfd fast-detect |
Enables BFD fast-detection on the specified IPV4 unicast destination address prefix and on the forwarding next-hop address. |
minimum interval interval |
(Optional) Ensures that the next hop is assigned with the same hello interval. Replace interval with a number that specifies the interval in milliseconds. Range is from 10 through 10000. |
multiplier multiplier |
(Optional) Ensures that the next hop is assigned with the same detect multiplier. Replace multiplier with a number that specifies the detect multiplier. Range is from 1 through 10. |
Command Default
interval : 100
multiplier : 3
Command Modes
Static route configuration mode
Command History
Release |
Modification |
---|---|
Release 3.7.2 |
This command was introduced. |
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance.
If the multiplier is changed using the bfd multiplier command, the new parameter is used to update all existing BFD sessions for the protocol (BGP, IS-IS, MPLS-TE, or OSPF).
Task ID
Task ID |
Operations |
---|---|
static |
read, write |
Examples
The following example shows how to enable BFD on a static route. In this example, BFD sessions are established with the next-hop 3.3.3.3 when it becomes reachable.
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# router static
RP/0/RSP0/CPU0:router (config-static)# address-family ipv4 unicast 2.2.2.0/24 3.3.3.3 bfd fast-detection