H3C Technologies H3C MSR 50 - Manual (Page 84)

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Step Command Remarks
84. Enter the specified interface
view. interface interface-type
interface-number
N/A
85. Configure the priority of the
router in the VRRP group. vrrp ipv6 vrid virtual-router-id
priority priority-value Optional.
100 by default.
86. 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 0 seconds
by default.
87. 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.
88. 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.
You can configure the VF tracking function when VRRP operates in either standard mode or load
balancing mode. However, the VF tracking function is effective only when VRRP operates in load
balancing mode.
By default, the weight of a VF is 255, and its lower limit of failure is 10.
If the weight of a VF owner is higher than or equal to the lower limit of failure, the priority of the VF owner
is always 255 and does not change with the weight value. Therefore, if an uplink fails, another VF takes
over the VF owner's work and becomes the AVF only when the weight of the VF owner decreases by a
correctly specified value and becomes lower than the lower limit of failure. In other words, the weight of
the VF owner decreases by more than 245.
To configure VF tracking: