Riverstone Networks WICT1-12 - Manual (Page 205)

Riverstone Networks RS Switch Router User Guide Release 8.0 12-9
VRRP Configuration Guide Additional Configuration
12.2 ADDITIONAL CONFIGURATION
This section covers settings you can modify in a VRRP configuration, including backup priority, advertisement
interval, pre-empt mode, and authentication key.
12.2.1 Setting the Backup Priority
As described in Section 12.1.3, "Multi-Backup Configuration" , you can specify which Backup router takes over when
the Master router goes down by setting the priority for the Backup routers. To set the priority for a Backup router, enter
the following command in Configure mode:
To specify 200 as the priority used by virtual router 1 on interface int1:
The priority can be between 1 (lowest) and 254. The default is 100. The priority for the IP address owner is 255 and
cannot be changed.
12.2.2 Setting the Warmup Period
When the Master router goes down, the Backup router takes over. When an interface comes up, the Master router may
become available and take over from the Backup router. Before the Master router takes over, it may have to update its
routing tables. You can specify a warmup period, in seconds, during which the Master router can update its routing
information before it preempts the existing Master router.
To specify a warmup period for a Master router before it takes over:
The warmup period can be between 1 and 180 seconds. The default is 30 seconds.
12.2.3 Setting the Advertisement Interval
The VRRP Master router sends periodic advertisement messages to let the other routers know that the Master is up and
running. By default, advertisement messages are sent once each second. To change the VRRP advertisement interval,
enter the following command in Configure mode:
To set the advertisement interval to 3 seconds:
rs(config)# ip-redundancy set vrrp 1 interface int1 priority 200
rs(config)# ip-redundancy set vrrp 1 warmup-period 20
rs(config)# ip-redundancy set vrrp 1 interface int1 adv-interval 3