Vrrp Parameters; Advertisement Interval - ZyXEL Communications MS-7206 - EDITION 1 Manual

Chapter 38 VRRP
the default gateway. If switch A has a higher priority, it is the master router.
Switch B, having a lower priority, is the backup router.
Figure 136 VRRP: Example 1
If switch A (the master router) is unavailable, switch B takes over. Traffic is then
processed by switch B.

38.1.1 VRRP Parameters

This section describes some VRRP parameters.

38.1.1.1 Advertisement Interval

The master router sends out Hello messages to let the other backup routers know
that it is still up and running. The time interval between sending the Hello
messages is the advertisement interval. By default, a Hello message is sent out
every second.
If the backup routers do not receive a Hello message from the master router after
this interval expires, it is assumed that the master router is down. Then the
backup router with the highest priority becomes the master router.
Note: All routers participating in the virtual router must use the same advertisement
interval.
38.1.1.2 Priority
Configure the priority level (1 to 254) to set which backup router to take over in
case the master router goes down. The backup router with the highest priority will
take over. The priority of the VRRP router that owns the IP address(es) associated
with the virtual router is 255.
282
MS-7206 User's Guide