PLANET XGS3-24042 - Manual (Page 1078)

61-1
Chapter 61 Commands for IPv6
VRRPv3 Configuration
61.1 advertisement-interval
Command:
advertisement-interval <adver_interval>
Function:
Configure the advertisement interval of VRRPv3.
Parameters:
<adver_interval> is the interval of sending VRRPv3 advertisement messages, in centiseconds,
ranging from 100 to 1000, and has to be a multiple of 100.
Command Mode:
VRRPv3 Protocol Mode.
Default:
<adver_interval> is 100 centiseconds (1 second) by default.
Usage Guide:
The Master in a VRRPv3 backup group will send a VRRPv3 message to notify other routers
(layer-three switches) in the group that it is working normally at intervals. This interval is
adver_interval. If the Backup hasn’t received any VRRPv3 message from Master over a certain
period of time (the length of the time is master_down_interval), it will assume that the master is not
working normally and will change the state of itself to Master.
Uses can use this command to adjust the interval of VRRPv3 advertisement messages sent by
Master. For the members in the same backup group, this attribute should have same value. For
Backup, the value of its master_down_interval should be three times more than adver_interval. If
the network flow is too big or different routers (or layer-three switches) have different timers,
master_down_interval might has a time-out, which will cause a state change as a result. This kind
of situation can be solved by prolonging adver_interval or setting a longer preempts delay time.
Example:
Configure the VRRPv3 advertisement interval as 300 centiseconds.
Switch(config-router)# advertisement-interval 300