3Com S7906E Configuration Manual page 2089

To do...
Configure the router in the
VRRP group to work in
preemptive mode and
configure preemption delay
Configure the interface to be
tracked
Configure VRRP to track a
specified Track object
The running priority of an IP address owner is always 255 and you do not need to configure it. An IP
address owner always works in the preemptive mode.
Do not configure VRRP tracking of an interface or an object on an IP address owner.
If the state of the interface under tracking changes from down or removed to up, the priority of the
router corresponding to the interface is restored automatically.
If the state of a Track object changes from negative or invalid to positive, the priority of the router
corresponding to the Track object is restored automatically.
Configuring VF Tracking
Configuration prerequisites
Before configuring the VF tracking function, create a VRRP group and configure a virtual IP address for
it.
Configuration procedure
VRRP works in the load balancing mode. Suppose that the VF is configured to monitor the Track object.
When the state of the Track object becomes negative or invalid, the weight values of all VFs on the
routers decrease by a specified value; when the state of the Track object becomes positive, the weight
values of all VFs on the routers restore their original values.
Follow these steps to configure VF tracking:
To do...
Enter system view
Enter the specified interface
view
Configure the VF to monitor a
specified Track object
Use the command...
vrrp vrid virtual-router-id
preempt-mode [ timer delay
delay-value ]
vrrp vrid virtual-router-id track
interface interface-type
interface-number [ reduced
priority-reduced ]
vrrp vrid virtual-router-id track
track-entry-number [ reduced
priority-reduced | switchover ]
Use the command...
system-view
interface interface-type
interface-number
vrrp vrid virtual-router-id
weight track
track-entry-number [ reduced
weight-reduced ]
1-16
Remarks
Optional
The router in the VRRP group
works in preemptive mode and
the preemption delay is 0
seconds by default.
Optional
No interface is being tracked by
default.
Optional
Not configured by default.
Remarks
—
—
Required
No Track object is specified by
default.