Description of the problem

Upgrade encountered a problem: Huawei OSN3500 device site to replace the SCC (5.12.13.47P01) for GSCC (5.21.18.50) after the data download failed to return error code: 38752

Alarm message

Data download failed with error parameter: 38752

Processing

1. Turn off the low-order broadcast optimization switch of the GSCC version of the master control before changing the GSCC.

2. If there is a 1+1 LMSP on the SCC to be changed and there are services to the LMSP, you must turn off the low-order broadcast optimization of the GSCC version (you must turn off this switch on the empty subrack because the switch must be turned off to take effect by executing cfg-verify)

3. If the 1+1 LMSP does not exist on the SCC to be switched, it does not need to be turned off and can be downloaded directly.

4、The download is successful after the low-order broadcast optimization switch is turned off on site;

Close method: Execute the following two commands on the command line:

:cfg-set-1j1lmsp-lxcoptmz:disable

:cfg-verify

root cause

1. R8CO2B01L (5.21.18.50) host GSCC, cross-board for version 13.47P01 software;

2, through the network management of the download, in the cfg-verify when the rollback, the rollback reason is that the cross board does not recognize the master issued by the level of the cross-matrix service;

3, Huawei OSN3500 cross board does not recognize the main reason is that the R8C02B01L version of the 1 +1 LMSP low-order broadcast optimization switch is turned on by default, resulting in the host sends the matrix when sending the optimized matrix to the cross board, the lower version of the cross board does not recognize the level of the service, the return parameter error in the verification judgment, resulting in the failure of the download.

Suggestions and Summary

In order to facilitate subsequent maintenance, it is recommended that the low-order broadcast optimization switch in the existing network be turned on or off uniformly.

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 reprint! Our company specializes in the sales of Huawei SDH optical transmission equipment, SDH transmission equipment.