Description of the problem

When the performance of Huawei SDH transmission equipment is found to be missing a certain line board performance. Then the single board query for this single board performance returns a value of NULL.

Processing

First, query whether this single board is working, and execute the command :cfg-get-workstat:bid

#9-44:szhw [][][2011-10-22 23:43:09+08:00]>

:cfg-get-workstat:5

BD-WORK-STATUS

BID WORK-STAT

5 not work

Total records :1

The board is found to be not working, and the performance is not monitored if the board is not working.

Then I analyzed the reason why the single board did not start, firstly, I replaced the single board to another slot, and found that it could start normally, so I judged that it was a slot problem. After replacing the subrack, the problem was solved.

Root cause

The root cause of this problem is that the veneer fails to start due to a slot failure, and thus the performance of the veneer cannot be queried.

Solution

Emergency recovery measures: Replace the slot or replace the subrack.

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