See the first figure in VRRP Topology for the toplology in this example. You can configure VRRP to preempt the existing router. This means that if a new VRRP router is added to the network with priority higher than the existing routers, then the new router becomes the master. If preemption is disabled, then the new router will not become a master. This router becomes master only when the current master is down, that is, only when it does not receive any advertisement packets from the current master. By default, preempt mode is enabled.
SEFOS# configure terminal SEFOS(config)# router vrrp SEFOS(config-vrrp)# interface vlan 2 SEFOS(config-vrrp-if)# vrrp 1 preempt SEFOS(config-vrrp-if)# end
SEFOS# show vrrp interface vlan 2 detail vlan2 - vrID 1 --------------- State is Master Virtual IP address is 12.0.0.5 Virtual MAC address is 00:00:5e:00:01:01 Master router is 12.0.0.5 Associated IpAddresses : ---------------------- 12.0.0.5 12.0.0.6 Advertise time is 1 secs Current priority is 200 Configured priority is 200, may preempt Accept Mode Disabled
SEFOS# show vrrp interface vlan 2 detail vlan2 - vrID 1 --------------- State is Backup Virtual IP address is 12.0.0.5 Virtual MAC address is 00:00:5e:00:01:01 Master router is 12.0.0.5 Associated IpAddresses : ---------------------- 12.0.0.5 12.0.0.6 Advertise time is 1 secs Current priority is 150 Configured priority is 150, may preempt Accept Mode Disabled