Handling redundancy events

After binding to a TUP user SAP, the application receives a status indication indicating the MTP redundancy or run state on the board. The event type associated with status indication (EVTSITSTAIND) indicates one of the following states:

State

Description

TUPMTP3STANDALONE

Application is in a non-redundant configuration. Normal operation can begin.

TUPMTP3PRIMARY

The run state of MTP is primary on this board in a redundant board pair. Normal operation is allowed as long as the board remains primary.

TUPMTP3BACKUP

The run state of MTP is backup on this board in a redundant board pair, monitoring the status of the primary board. No active traffic passes through this SAP until the board becomes the primary member of the pair.

TUPMTP3RESUME

MTP resume indication is delivered to the application when the TUP layer receives a resume indication from the MTP3 layer.

TUPMTP3PAUSE

MTP pause indication is delivered to the application when the TUP layer receives a resume indication from the MTP3 layer.