Procedure
- Enable BFD support with the command
bfd.
- Enable BFD on a VRRP interface with the command
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 |
德fault 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 VRRP interface.
switch#configswitch(config)#bfdswitch#interface 1/1/1switch(config-if)#no shutdownswitch(config-if)#ip address 192.168.1.1/24switch(config-if)#vrrp 1 ipv4地址系列switch(config-if-vrrp)#bfd 192.158.1.2switch(config-if-vrrp)#exitswitch#show vrrpVRRP is enabled Interface 1/1/1 - Group 1 - Address-Family IPv4 State is MASTER State duration 56 mins 57.826 secs Virtual IP address is 192.168.1.1 Virtual MAC address is 00:00:5e:00:01:01 Advertisement interval is 1000 msec Preemption enabled Priority is 100 BFD is enabled Master Router is 192.168.1.1 (local), priority is 100 Master Advertisement interval is 1000 msec Master Down interval is unknown Tracked object ID is 1, and state Down