Procedure
- Enable BFD support with the command
bfd.
- Enable BFD on an IPv4 static route with the command
ip route bfd.
- For most deployments, the default values for the following features do not need to be changed. If your deployment requires different settings, change the default values with the indicated command:
| BFD setting |
Default value |
命令来改变它 |
| Sets the BFD detection multiplier on an interface. |
5 |
bfd detect-multiplier |
| Sets the minimum time interval between received BFD echo packets. |
500 milliseconds |
bfd min-echo-receive-interval |
| Sets the minimum time interval between transmitted BFD control packets on an interface. |
3000 milliseconds |
bfd min-transmit-interval |
Configuring the timers to be too aggressive (for example, detect-multiplier of 1) can sometimes lead to BFD session flaps depending upon traffic conditions.
- Review BFD configuration settings with the commands
show bfd.
Example
Enabling BFD on a static IPv4 route.
switch#configswitch(config)#bfdswitch#interface 1/1/1switch(config-if)#no shutdownswitch(config-if)#ip address 192.168.1.1/24switch(config-if)#exitswitch(config)#ip route 10.0.2.0/24 20.0.0.2 bfd