The SAP board becomes unreachable to the NMS or fails to report the relay alarm due to its faulty hardware. After the SAP board is replaced with a proper one, the fault is rectified.
Symptom
The SAP board on the OptiX OSN 2500 does not report the relay alarm. On the NE panel, the SAP board icon is unavailable. In addition, two tributary boards, one optical amplification board, and two PIU boards report the COMMUN_FAIL and BD_STATUS alarms. After a cold reset is performed for the SAP board, the fault persists.
Cause Analysis
The SAP board enables other boards on the OptiX OSN 2500 subrack to communicate with each other. If many boards report the BD_STATUS and COMMUN_FAIL alarms, you need to first check whether the SAP board is faulty.
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