3Com 5500-EI PWR, Reference Manual

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for a period three times of the advertisement interval, they send VRRP advertisements to other
members of the VRRP group to elect a new master.
Note that configuration error occurs if switches of the same VRRP group are configured with different
adver-interval values.
Examples
# Set the interval for the master to send VRRP advertisements to 15 seconds.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Vlan-interface 2
[Sysname-Vlan-interface2] vrrp vrid 1 timer advertise 15
vrrp vrid track interface
Syntax
vrrp vrid virtual-router-id track interface vlan - interface vlan-id [ reduced value-reduced ]
undo vrrp vrid virtual-router-id track interface vlan - interface vlan-id
View
VLAN interface view
Parameters
virtual-router-id : VRRP group ID, ranging from 1 to 255.
vlan-id : A VLAN interface ID to be tracked.
value-reduced : Value by which the priority decreases. This argument ranges from 1 to 255 and defaults
to 10.
Description
Use the vrrp vrid track interface command to set a VLAN interface to be tracked.
Use the undo vrrp vrid track interface command to disable a VLAN interface from being tracked.
The VLAN interface tracking function extends the use of the backup function. With this function enabled
on a switch, the backup function can take effect not only when the VLAN interface where a VRRP group
resides fails, but also when some other VLAN interfaces on the switch fail. You can utilize the VLAN
interface tracking function by specifying monitored VLAN interfaces.
When the tracked VLAN interface on the master of a VRRP group is down, the priority of the master
decreases by the value set by the value-reduced argument, allowing a switch with the highest priority in
the VRRP group becomes the master.
z
If an IP address owner exists in a VRRP group, do not configure the interface tracking function on
the IP address owner. If configured, the function cannot take effect.
z
A VRRP group can track up to eight VLAN interfaces simultaneously.