Collaboration Between The Track Module And The Application Modules; Configuring Collaboration Between The Track Module And The Detection Modules; Configuring Track-Nqa Collaboration - H3C S9500E Series Configuration Manual

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For more information about NQA Configuration, see NQA in the Network Management
and Monitoring Configuration Guide.
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For more information about BFD, see BFD in the High Availability Configuration Guide.
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The interface management module is used to monitor the physical status or Layer 3 protocol
status of an interface. When the physical status or Layer 3 protocol status of an interface is
up, the status of a track entry is Positive; when the physical status or Layer 3 protocol status
of an interface is down, the status of a track entry is Negative.
Collaboration between the track module and the
application modules
You can establish collaboration between the track module and application modules through
configuration. If the status of the track entry changes, the track module notifies the application
modules to deal with the change.
Application modules that can collaborate with the track module include:
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VRRP
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Static routing
In some cases, when the status of the track entry changes, if the track module notifies the
application modules immediately, communication may be interrupted because routes cannot be
recovered in time. For example, the master in a VRRP group monitors the uplink interface through
the track module. When the uplink interface fails, the track module notifies the master to reduce
its priority so that a backup with a higher priority can preempt as the master to forward packets.
When the uplink interface recovers, if the track module notifies the original master to restore its
priority immediately, the master will forward packets immediately; however, the uplink route has
not been recovered yet, which may result in packet forwarding failure. To prevent this, you can
configure a specified delay time before the track module notifies the application modules of the
track entry status change.
Configuring collaboration between the track
module and the detection modules
To implement the collaboration function, you need to establish collaboration between the track
module and the detection modules, and between the track module and the application modules.

Configuring track-NQA collaboration

Through the following configuration, you can establish collaboration between the track module
and NQA, which probes the link status and informs the track module of the probe result.
To configure track-NQA collaboration:
To do...
1. Enter system view
Use the command...
system-view
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Remarks
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