Problem with Huawei WDM OSN 6800 log out from T2000 Frequently?

The metro WDM system of the local network comprises the OptiX OSN 8800 and the OptiX OSN 6800 devices. The software version of both the OptiX OSN 8800 and the OptiX OSN 6800 is 5.51.04 .24. The version of the iManager T2000 is V2R 7C 02. The customer reports that NE 6 -221 in the system logs out from the iManager T2000 frequently. Logging in to NE 6-221 by using the relevant command line fails.

Log in to NE 9-188 by using the relevant command, and then run the cm-get-eccroute command.

The system returns the following data:

0x000600dd  0x000600dd   0    4    auto      47      11

The returned data shows that the ECC from NE 9-188 to NE 6-221 is normal. Logging in to NE 6-221 by using the relevant command line, however, remains unsuccessful.

The iManager T2000 shows that NE 9-188 is not connected directly to NE 6-221. Other NEs exist between NE 9-188 and NE 6-221. Why does the eccroute data show the distance is 0?

Check the channel allocation of the WDM system.

It is detected that a service channel is configured between NE 9-188 and NE 6-221. The service in that channel passes through the intermediate station.

Re-log in to NE 9-188, and then run the cm-get-newbdinfo command.

The system returns the following data:

 21       255       1     port-enable   GCC12_18      47         ok 

The gateway NE 9-188 monitors NE 6-221 through the ESC of the optical port in slot 21 on board 1. The check shows that a large number of performance events exist in the corresponding channel. The cause for the problem is located: The current Huawei WDM system supports OSC-based and ESC-based monitoring modes. The system uses the ESC-based monitoring by default because of the bandwidth. When the signal performance of the ESC channel deteriorates, the monitored devices log out from the iManager T2000 frequently or even logging in to the device fails.

When the signal performance of the ESC channel deteriorates, the monitored devices log out from the iManager T2000 frequently or even logging in to the device fails.

On the iManager T2000, disable the ESC communication in slot 21 of NE 9-188.

NE 6-221 is displayed as normal on the iManager T 2000 a few minutes later. In addition, logging into NE 6-221 succeeds.

Run the cm-get-eccroute command on NE 9-188.

The system returns the following data:

0x000600dd  0x000900bd    1     4    auto       1       90   

The distance between gateway NE 9-188 and NE 6-221 is 1. This shows that the gateway NE monitors NE 6-221 through the OSC.The ESC-based monitoring of the WDM system is affected by the relevant channel performance. Therefore, faults often occur in actual applications. It is recommended that all new metro Huawei WDM systems use the OSC-based monitoring.