H3C Technologies H3C S10500 Series Switches - Manual (Page 147)

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Configuring router priority, preemptive mode and tracking
function
Configuration prerequisites
Before you configure router priority, preemptive mode and tracking function, create a VRRP group and
configure its virtual IPv6 address.
Configuration procedure
By configuring router priority, preemptive mode, interface tracking, or a track entry, determine which
router in the VRRP group serves as the master.
Follow these steps to configure router priority, preemptive mode and interface tracking:
To do… Use the command… Remarks
Enter system view system-view —
Enter the specified interface view
interface interface-type
interface-number
—
Configure the priority of the router
in the VRRP group vrrp ipv6 vrid virtual-router-id
priority priority-value Optional
100 by default
Configure the router in the VRRP
group to work in preemptive mode
and configure preemption delay of
the VRRP group
vrrp ipv6 vrid virtual-router-id
preempt-mode [ timer delay
delay-value ]
Optional
The router in the VRRP group works
in preemptive mode and the
preemption delay is zero seconds
by default.
Configure the interface to be
tracked
vrrp ipv6 vrid virtual-router-id track
interface interface-type
interface-number [ reduced
priority-reduced ]
Optional
No interface is being tracked by
default.
Configure VRRP to track a
specified track entry
vrrp ipv6 vrid virtual-router-id track
track-entry-number [ reduced
priority-reduced | switchover ]
Optional
Not configured by default.
NOTE:
•
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 preemptive mode.
• Interface tracking is not configurable on an IP address owner.
• If you configure an interface to be tracked or a track entry to be monitored on a router that is the IP
address owner in a VRRP group, the configuration does not take effect. If the router is not the IP address
owner in the VRRP group later, the configuration takes effect.
• If the state of a tracked interface changes from down or removed to up, the priority of the router that
owns the interface is automatically restored.
• If the state of a track entry changes from negative or invalid to positive, the priority of the router where
the track entry is configured is automatically restored.