Configuring Association Between Vrrp And Nqa To Monitor The Uplink Status - Huawei AR530 Series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Reliability
By default, when the monitored BFD session becomes Down, the VRRP priority decreases by
10.
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6.7.2.4 Configuring Association Between VRRP and NQA to Monitor the Uplink
Status
Context
Because VRRP cannot detect faults on the uplink of a VRRP group, services may be interrupted.
You can associate a VRRP group with an NQA test instance on the master so that the NQA test
instance monitors the uplink status of the master. When the NQA test instance detects a fault on
the uplink, it notifies the VRRP group that the priority of the master needs to be decreased. Then
an active/standby switchover is triggered immediately. This reduces the impact of the uplink
fault on service forwarding.
When the fault is rectified, the original master restores its priority and switches to the master to
forward traffic.
NQA technology collects statistics on the delay, jitter, and packet loss ratio. You can configure
the percentage of failed NQA test instances and NQA association to trigger an active/standby
switchover when the uplink is unstable.
Procedure
Step 1 Create an NQA ICMP test instance. For details, see Configuring an ICMP Test Instance.
Step 2 Run:
system-view
The system view is displayed.
Step 3 Run:
interface interface-type interface-number
The view of the interface on the master where a VRRP group is configured is displayed.
Issue 01 (2014-11-30)
NOTE
When associating a VRRP group with a BFD session, note the following points:
l If session-name bfd-configure-name is specified, the VRRP group can be bound to only the static BFD
session with automatically negotiated discriminators.
l If bfd-session-id is specified, the VRRP group can be bound to only the static BFD session.
l After a VRRP group is associated with a BFD session, the BFD session type cannot be modified. Before
deleting the BFD session type, you must delete all original configurations.
l After the value by which the priority decreases is set, ensure that the priority of the backup is higher
than the priority of the master.
NOTE
l A VRRP group can only be associated with an NQA ICMP test instance.
l The master and backup in the VRRP group must work in preemption mode. It is recommended that
the preemption delay be 0 on the backup and non-0 on the master.
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