Description of the problem

OSN3500 gateway network element abnormal de-control, business is normal, a moment of automatic normal monitoring, query the network element side of the history of the alarm returns to empty, the user needs to analyze the cause. The host version is 5.21.18.50P01, the master model is SSN4GSCC, the network management reports CONNECT_FAIL, NE_COMMU_BREAK and other alarms.

Processing

1. Since this network element is a gateway network element, we suggest that the user ping the corresponding IP, and the user feedbacks that monitoring has been resumed before the user has time to ping the test;

2, it is recommended that the user will be the main gateway of the network element modified to other gateway network element, and then connected to the device cable into the computer for long ping, to see whether there is a loss of packets or interruptions, the long practice test found that the DCN is not a problem;

3, the neighboring network elements have no abnormal alarms and normal business, to rule out the problem of network element power loss;

4, due to the query network element on the return of historical alarms is empty, so suspect the main control board reset, the collection of errlog reset records back to the R & D analysis, found that there is a platform tVos1s task reset, the following red part of the figure.

5, consulting R & D learned that, for SSN4GSCC, host 18.55 previous version of the known platform problems: 8560 diab compiler array initialization - tVos1s abnormal reset;

6, the conditions that trigger the host reset are: no CPU single board such as PIU, AUX, etc. Frequent reset caused by small probability events.

Root cause

1. user DCN problem;

2. equipment power down;

3, Main control board reset;

4, the main control board failure.

Solution

Upgrade to OSN3500 device software to version V1R8C02SPC500 (5.21.18.55) to solve the problem.

The related technical information in this chapter and the troubleshooting process of SDH equipment are collected and organized by Shenzhen Optical Transmission Network Technology Company Limited ( www.opticaltrans.com), please retain the reproduction! Our company specializes in the sale of Huawei SDH optical transmission equipment, SDH transmission equipment.