R3166-R3206-HP High-End Firewalls High Availability Configuration Guide-6PW101

• NQA (see the chapter “NQA configuration”)

• Interface management module

Collaboration between the track module and an application module

After being associated with an application module, when the status of the track entry changes, the track

module notifies the application module, which then takes proper actions.

The following application modules can be associated with the track module:

• Virtual Router Redundancy Protocol (VRRP)

• Static routing

• Policy-based routing (PBR)

In some cases, when the status of a track entry changes, if the track module immediately notifies the

application modules, 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 immediately notifies the original master to restore its priority, the master immediately will

forward packets; however, the uplink route has not been recovered yet, which may result in packet

forwarding failure. Then configure the track module to wait a specified delay time before notifying the

application modules of the track entry status change.

Track configuration task list

To implement the collaboration function, establish collaborations between the track module and the

detection modules, and between the track module and the application modules.

Complete these tasks to configure track module:

Task Remarks

Associating the track module

with a detection module

Associating track with NQA

Required

Use either of the approaches

Associating track with interface

management

Associating the track module

with an application module

Associating track with VRRP

Required

Use any of the approac

hes.

Associating track with static routing

Associating track with PBR

Associating the track module with a detection

module

Associating track with NQA

NQA supports multiple test types to analyze network performance, services, service quality. For example,

an NQA test group can periodically detect whether a destination is reachable, or whether the TCP

connection to a TCP server can be set up.

When associated with a track entry, an NQA test group functions as follows: