3Com Switch 8800 Family IPsec Module Configuration and Command reference Guide

VRRP Configuration Commands 477
To allow a backup security gateway in a standby group to preempt the current
master when it has a higher priority, you must enable preemption on it. If
immediate preemption is not desired, you can set a preemption delay. The delay
automatically changes to 0 seconds when preemption is disabled.
By default, the preemption mode is adopted with the delay of 0 seconds.
Example
# Enable preemption on the security gateway in standby group 1.
[SecBlade_FW-GigabitEthernet0/0.1] vrrp vrid 1 preempt-mode
# Set the preemption delay to five seconds.
[SecBlade_FW-GigabitEthernet0/0.1] vrrp vrid 1 preempt-mode timer delay 5
# Disable preemption on the security gateway in standby group 1.
[SecBlade_FW-GigabitEthernet0/0.1] undo vrrp vrid 1 preempt-mode
vrrp vrid priority Syntax
vrrp vrid virtual-router-ID priority priority-value
undo vrrp vrid virtual-router-ID priority
View
Interface view
Parameter
virtual-router-ID: VRRP standby group number, in the range of 1 to 255.
priority-value: Priority value, in the range 1 to 254.
Description
Use the vrrp vrid priority command to configure the priority of the security
gateway in the specified standby group.
Use the undo vrrp vrid priority command to restore the default.
In VRRP, the role that a SecBlade card plays in a standby group depends on its
priority. A higher priority means that the security gateway is more likely to become
the master. Note that priority 0 is reserved for special use and 255 for the IP
address owner.
BY default, the priority is 100.
Example
# Set the priority of the security gateway in standby group 1 to 150.
[SecBlade_FW-GigabitEthernet0/0.1] vrrp vrid 1 priority 150
vrrp vrid timer advertise Syntax
vrrp vrid virtual-router-ID timer advertise adver-interval