R3303-HP HSR6800 Routers High Availability Configuration Guide

161
synchronous/asynchronous serial interfaces can be PPP only, and the tracked
synchronous/asynchronous serial interfaces cannot be added to a virtual template or MP-group.
• 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.
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.
To configure router priority, preemptive mode and interface tracking:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter the specified interface
view.
interface interface-type
interface-number
N/A
3. Configure the priority of the
router in the VRRP group.
vrrp ipv6 vrid virtual-router-id
priority priority-value
Optional.
100 by default.
4. Configure the router in the
VRRP group to operate 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
operates in preemptive mode and
the preemption delay is zero
seconds by default.
5. 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.
6. 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.
Configuring VF tracking
Configuration prerequisites
Before you configure the VF tracking function, create a VRRP group and configure a virtual IPv6 address
for it.
Configuration procedure
VRRP operates in load balancing mode. Assume that you have configured the VF tracking function to
monitor a track entry and specified the value by which the weight decreases. When the status of the track
entry becomes negative, the weight values of all VFs on the router decrease by the specified value. When
the status of the track entry becomes positive or invalid, the weight values of all VFs on the router restore
their original values.
If you configure the VF tracking function on an LVF to monitor its corresponding AVF on a specified router,
the LVF can take over the AVF immediately when the status of the track entry becomes negative, to ensure
uninterrupted network communications.