Description of the problem

A bureau originally used Metro300 SS62EGT2 binding 4 VC4 to open GE services, one day one end of the replacement for OSN3500V100R010C03 equipment using SSN3EGS4, query service configuration is normal, no abnormal alarms, GE services do not work.

Alarm information

No

Processing

1. Synchronize the network element alarms without alarms;

2、Query Ethernet service configuration, binding channel is normal;

3、Ethernet test frame is not available, query the RMON performance at both ends, only receiving packets without sending packets, proving that the Ethernet service is not available;

4. Modify the internal and external ports of EGS4 to ACCESS and TAG AWARE, and the service is still not available;

5, compare the internal port settings, encapsulation/mapping, found that SS62EGT2 scrambling mode is unscrambled, SSN3EGS4 is scrambled mode [X43+1], modify SSN3EGS4 unscrambled, GE service is normal.

Root cause

The Metro3000 SS62EGT2 board does not match the SSN3EGS4 scrambling method of the OSN3500, resulting in the service not being available

Solution

After modifying the SSN3EGS4 non-scrambling code, the GE service is normal.

Recommendation and summary

1. RMON performance can rule out whether it is an external failure or a transmission failure;

2, different veneer docking to carefully compare the individual parameter settings are consistent.

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