Huawei NetEngine80E Configuration Manual - Reliability page 162

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Context
The VRRP backup group on an interface enters the Initialize state and performs a master/backup
VRRP switchover if a link or an interface goes Down. Although the master/backup VRRP
switchover is performed, the host route, static route, or network segment route are not removed
from the interface. As a result network-to-user traffic flows through the failed link, causing
traffic loss or service interruptions.
To address this problem, the VRRP backup group can be associated with routes of a VRRP-
enabled interface. The routes include the network segment, host, and static routes. The
association allows the VRRP-enabled interface to remove the routes if the VRRP status becomes
Initialize and advertise the routes if the VRRP status becomes Backup or Master.
Perform the following steps on the device that needs to implement a rapid master/backup VRRP
switchover:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The view of the interface where the VRRP IPv4 backup group is configured is displayed.
Step 3 Run:
vrrp trigger route
The VRRP backup group is associated with routes.
At present, an interface can be configured with multiple VRRP backup groups, each of which
has its own VRRP status. Configuring a single VRRP backup group on an interface is
recommended, preventing route flapping.
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Issue 02 (2014-09-30)
NOTE
Association between a VRRP backup group and routes has the following influences:
l On a QinQ termination sub-interface or VLANIF interface:
l When entering the Initialize state, this VRRP-enabled interface deletes the network segment route
and host route.
l When entering the Master state, this VRRP-enabled interface advertises the network segment
route and host route.
l On an interface of a different type:
l When entering the Initialize state, this VRRP-enabled interface deletes the network segment
route.
l When entering the Master state, this VRRP-enabled interface advertises the network segment
route.
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