15.2.6 Setting ADVERTISEMENT Packet-Send Interval
If the master and backup routers are switched over frequently because the network load is high and many advertisement packets are lost, you might be able to alleviate the problem by specifying a longer sending interval for advertisement packets. However, note that a backup router becomes the master if it does not receive an advertisement packet three consecutive times. If you specify a longer sending interval for advertisement packets, it might take longer for a backup router to take over as the master if the master fails.
The master and backup routers might also be switched over frequently when many virtual routers are configured on the Switch. In this case, adjust the sending interval of advertisement packets according to the following table.
|
Number of virtual routers configured on the Switch |
Sending interval of advertisement packets |
|---|---|
|
1~64 |
1 second or longer |
|
65~128 |
2 seconds or more |
|
129~192 |
3 seconds or more |
|
193~255 |
4 seconds or longer |
- Points to note
-
Specify the same sending interval of advertisement packets on both the master and backup virtual routers.
Command examples
-
(config-if)# vrrp 1 timers advertise 3
Sets the sending interval of advertisement packets to 3 seconds for virtual router VRID 1.