Why is the status of the SRU of the NE40 displayed as abnormal and how to deal with it?
Either in the existing network or in the lab, the status of the SRU of the NE40 is often displayed as abnormal. In this case, hidden risks exist although the device can run normally.
The principle for the abnormal state of the SRU of the NE40 is as follows:
The NE40 records the operation of the part in each slot in the running process (including the powering on and startup process).
When abnormalities are detected on the SRU, the LPU, the power supply, and the fan, alarm processing is generated, consisting of trap message, recording an abnormality in the log, leaving the status of the SRU abnormal, or the combination of the three methods.
Alarms can be viewed through the following command:
<Quidway>display alarm record all
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Warning information of slot 5:
Paf/License absent or error
Categories of the abnormal state of the SRU of the NE40 consist of the active/standby switchover module alarm, clock module alarm, power supply module, serial interface processing alarm, HDLC communication alarm, and paf/License inconsistency alarm. Generally, these alarms generate trap message or are recorded into the log.
If abnormalities occur on the device management module, the status of the SRU is directly left abnormal.
Obviously, some abnormalities are ocular and can be rapidly located, and others need deep analysis. The status of the SRU returns to normal after faults are removed. If the status of the SRU can automatically return to normal from abnormal, analysis is not required. If the status of the SRU of the NE40 is displayed as abnormal, collect diag information and logs for the active/standby SRU immediately for analysis.