H3C Technologies H3C S12500-X Series Switches - Manual (Page 79)

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• NQA.
• BFD.
• CFD.
• Interface management.
Collaboration between the Track module and an application module
The following application modules can be associated with the Track module:
• VRRP.
• Static routing.
• Policy-based routing.
When configuring a track entry for an application module, you can set a notification delay to avoid
immediate notification of status changes, which can cause communication failure. This issue occurs when
route convergence is slower than the link state change notification. For example, when the master in a
VRRP group detects that the uplink interface fails through the Track module, the Track module notifies the
master to decrease its priority so that a backup with higher priority preempts as the new master. When
the failed uplink interface recovers, the Track module immediately notifies the original master to restore
its priority and forward traffic. If the uplink route has not recovered, forwarding failure will occur.
Collaboration application example
The following is an example of collaboration between NQA, Track, and static routing.
Configure a static route with next hop 192.168.0.88 on the device. If the next hop is reachable, the static
route is valid. If the next hop becomes unreachable, the static route should become invalid. For this
purpose, configure collaboration between the NQA, track, and static routing modules:
1. Create an NQA test group to monitor the accessibility of IP address 192.168.0.88.
2. Create a track entry and associate it with the NQA test group. When the next hop 192.168.0.88
is reachable, the track entry is in Positive state. When the next hop becomes unreachable, the track
entry is in Negative state.
3. Associate the track entry with the static route. When the track entry turns to the Positive state, the
static route is valid. When the associated track entry turns to Negative state, the static route is
invalid.
Track configuration task list
To implement the collaboration function, establish associations between the Track module and the
detection modules, and between the Track module and the application modules.
To configure the Track module, perform the following tasks:
Tasks at a glance Remarks
(Required.) Associating the Track module with a detection module :
• Associating Track with NQA
• Associating Track with BFD
• Associating Track with CFD
• Associating Track with interface management
Use one of the
methods.