3com 8807 Guida Di Riferimento

Use the vrrp vrid preempt-mode command to configure the preemption and 
delay of the virtual router.

Use the undo vrrp vrid preempt-mode command to cancel the preemption.

By default, virtual router is in preempt mode and delay-value is 0 second.

If a higher-priority switch is required to preempt the Master, you need to configure 
it as preemption. You can also set a delay for the preemption. If you configure it 
not to preempt, the delay will be set to 0 automatically.

# Configure the switch to preempt.

[3Com-vlan-interface2] vrrp vrid 1 preempt-mode 

# Set a delay.

[3Com-vlan-interface2] vrrp vrid 1 preempt-mode timer delay 5 

# Configure the switch not to preempt.

[3Com-vlan-interface2] undo vrrp vrid 1 preempt-mode 

vrrp vrid virtual-router-ID priority priority

undo vrrp vrid virtual-router-ID priority

VLAN interface view

virtual-router-ID: VRRP virtual router ID, ranging from 1 to 255.

priority: Priority value, ranging from 1 to 254; By default, the priority value is 100.

Use the vrrp vrid priority command to configure the virtual router priority.

Use the undo vrrp vrid priority command to remove the virtual router priority.

The priority decides the status of a switch in the virtual router. A higher-priority 
switch is more likely to be a Master. Priority 0 is reserved for some special purpose. 
255 is reserved for the IP address owner. The priority of the IP address owner is 
always 255 and cannot be modified.

# Set the virtual router priority on VLAN-interface2.

[3Com-vlan-interface2] vrrp vrid 1 priority 120