Summary: When the OptiX OSN 1800II device restarts after power-off, the SCC board
reports the HARD_BAD and MOD_COM_FAIL alarms and the HARD_BAD and
MOD_COM_FAIL alarms persist.
Product Family: WDM Product Model: OptiX OSN 1800II
[Problem Description]
Trigger conditions:
This problem occasionally occurs (about a 1% probability) when OptiX OSN 1800II devices
using V100R005C10SPC100 or earlier versions restart after power-off.
Symptoms:
l The faulty SCC board reports the HARD_BAD and MOD_COM_FAIL alarms and the
HARD_BAD and MOD_COM_FAIL alarms persist.
l Impact on services:
− For the NE with only one SCC board: If this problem occurs, all data services on the local
NE are interrupted and cannot be automatically restored.
− For the NE with dual SCC boards: Data services on OTU boards can be automatically restored
after service interruption for 15 minutes. Data services connected to the faulty board are interrupted
and cannot be automatically restored.
Identification method:
Step 1 Check the alarms reported on the live network. If the HARD_BAD and MOD_COM_FAIL
alarms are displayed, go the Step 2.
Step 2 Perform a cold reset on the faulty board to identify the problem. If the fault is rectified after
the cold reset, this problem can be identified.
[Root Cause]
The resetting process of chips on boards using V100R005C10SPC100 and earlier versions has
problems, which result in that the board power-on occurs at a certain probability and the central
switching board cannot go online.
[Impact and Risk]
l For the NE with only one SCC board: If this problem occurs, all data services on the local NE are
interrupted and cannot be automatically restored. The alarms persist.
l For the NE with dual SCC boards: Data services on OTU boards can be automatically restored
after service interruption for 15 minutes. Data services connected to the faulty board are
interrupted and cannot be automatically restored. The alarms persist.
[Measures and Solutions]
Recovery measures:
l Cold reset the faulty SCC board.
Workarounds:
None
Preventive measures:
Upgrade the OptiX OSN 1800II to V100R005C10SPC200 or a later version (The NMS must
be upgraded to V200R014C50SPC200 accordingly).
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