Collaboration Application Example; Track Configuration Task List - HPE FlexNetwork HSR6800 series Configuration Manual

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:
•
VRRP.
•
Static routing.
•
Policy-based routing.
In some cases, the status of a track entry changes while a route is still recovering. This leads to
problems if the Track module immediately notifies the application modules of the status change and
the application modules begin using the route before it is ready.
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 failed uplink
interface recovers, if the Track module immediately notifies the original master to restore its priority,
the master immediately will forward packets to that interface. However, this result in packet
forwarding failure because the uplink route has not yet been recovered.
To solve this problem, configure a delay before the Track module notifies the application modules of
the track entry status changes.

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 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.
Complete these tasks to configure the Track module:
Task
Associating the Track module
with a detection module
Associating the Track module
with an application module
Associating Track with NQA
Associating Track with BFD
Associating Track with interface
management
Associating Track with VRRP
Associating Track with static routing
Associating Track with PBR
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Remarks
Required.
Use one of the methods.
Required.
Use one of the methods.