HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 140

Configuration procedure, Configuring VF tracking, Configuration guidelines, Configuration

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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: Step 1. Enter system view. Command system-view Remarks 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 vrrp ipv6 vrid virtual-router-id preemptive mode and preempt-mode [ timer delay configure preemption delay of delay-value ] the VRRP group. Optional. The router in the VRRP group operates in preemptive mode and the preemption delay is zero seconds by default. vrrp ipv6 vrid virtual-router-id track Optional. 5. Configure the interface to be interface interface-type tracked. interface-number [ reduced No interface is being tracked by priority-reduced ] 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 guidelines • You can configure the VF tracking function when VRRP is operating in either standard protocol mode or load balancing mode. However, the VF tracking function is effective only when VRRP is operating 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 properly 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. 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 133

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133
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:
Step
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 guidelines
•
You can configure the VF tracking function when VRRP is operating in either standard protocol
mode or load balancing mode. However, the VF tracking function is effective only when VRRP is
operating 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 properly 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.
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