Dell PowerConnect 7048P Manual page 1042

10 Track the route to the 192.168.200.0 network. If it becomes unavailable,
the priority of VRID 10 on Router A is decreased by 10, which is the
default decrement priority value.
console(config-if-vlan10)#vrrp 10 track ip route
192.168.200.0/24
console(config-if-vlan10)#exit
Router B is the backup router for VRID 10. The configured priority is 195. If
the VLAN 25 routing interface or route to the external network on Router A
go down, the priority of Router A will become 190 (or 180, if both the
interface and router are down). Because the configured priority of Router B is
greater than the actual priority of Router A, Router B will become the master
for VRID 10. When VLAN 25 and the route to the external network are back
up, the priority of Router A returns to 200, and it resumes its role as VRRP
master.
To configure Router B:
1 Enable routing for the switch.
console#config
console(config)#ip routing
2 Create and configure the VLAN routing interface to use as the default
gateway for network clients. This example assumes all other routing
interfaces, such as the interface to the external network, have been
configured.
console(config)#interface vlan 10
console(config-if-vlan10)#ip address 192.168.10.2
255.255.255.0
console(config-if-vlan10)#exit
3 Enable VRRP for the switch.
console(config)#ip vrrp
4 Assign a virtual router ID to the VLAN routing interface for the VRRP
group.
console(config)#interface vlan 10
console(config-if-vlan10)#vrrp 10
5 Specify the IP address that the virtual router function will use.
console(config-if-vlan10)#vrrp 10 ip 192.168.10.15
1042
Configuring VRRP