HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 135

Configuration prerequisites, Configuration procedure, Configuring VRRP packet attributes,

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Configuration prerequisites Before you configure the VF tracking function, create a VRRP group and configure a virtual IP address for it. Configuration procedure VRRP operates in load balancing mode. Assume that you have configured the VF tracking function to monitor the 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. To configure VF tracking: Step 1. Enter system view. 2. Enter the specified interface view. 3. Configure VF tracking. Command Remarks system-view N/A interface interface-type interface-number N/A Configure the VF tracking function to monitor a specified track entry and specify the value by which the weight decreases: vrrp vrid virtual-router-id weight track track-entry-number [ reduced weight-reduced ] Configure the VF tracking function to monitor an AVF on a specified router: vrrp vrid virtual-router-id track track-entry-number forwarder-switchover member-ip ip-address Use either approach. The VF tracking function is not configured by default. Configuring VRRP packet attributes Configuration guidelines • You might configure different authentication modes and authentication keys for the VRRP groups on an interface. However, the members of the same VRRP group must use the same authentication mode and authentication key. • Excessive traffic might cause a backup to trigger a change of its status because the backup does not receive any VRRP advertisements for a specified period of time. To solve this problem, prolong the time interval to send VRRP advertisements. • Configuring different intervals for sending VRRP advertisements on the routers in a VRRP group might cause a backup to trigger a change of its status because the backup does not receive any VRRP advertisements for a specified period of time. To solve this problem, configure the same interval for sending VRRP advertisements on each router in the VRRP group. 128

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128
Configuration prerequisites
Before you configure the VF tracking function, create a VRRP group and configure a virtual IP address for
it.
Configuration procedure
VRRP operates in load balancing mode. Assume that you have configured the VF tracking function to
monitor the 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.
To configure VF 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 VF tracking.
Configure the VF tracking function
to monitor a specified track entry
and specify the value by which the
weight decreases:
vrrp vrid
virtual-router-id
weight
track
track-entry-number
[
reduced
weight-reduced
]
Configure the VF tracking function
to monitor an AVF on a specified
router:
vrrp vrid
virtual-router-id
track
track-entry-number
forwarder-switchover
member-ip
ip-address
Use either approach.
The VF tracking function is not
configured by default.
Configuring VRRP packet attributes
Configuration guidelines
•
You might configure different authentication modes and authentication keys for the VRRP groups on
an interface. However, the members of the same VRRP group must use the same authentication
mode and authentication key.
•
Excessive traffic might cause a backup to trigger a change of its status because the backup does not
receive any VRRP advertisements for a specified period of time. To solve this problem, prolong the
time interval to send VRRP advertisements.
•
Configuring different intervals for sending VRRP advertisements on the routers in a VRRP group
might cause a backup to trigger a change of its status because the backup does not receive any
VRRP advertisements for a specified period of time. To solve this problem, configure the same
interval for sending VRRP advertisements on each router in the VRRP group.