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Problem Description
A bureau in order to enhance the stability of the equipment, the original OSN3500 single-master device upgraded to dual-master, the original master for the N1SCC, network element supporting version 5.21.13.47P01, the new replacement of the two master single board for the N3SCC02, version 5.21.18.50P01, due to the original master of the highest supported version of the R3, and the new master does not support the downgrade to the R3, so the Still according to the guidebook "OptiX OSN3500 SCC to GSCC Upgrade Guidebook-B" operation, but after replacing it with N3GSCC download, the calibration startup fails, the service is cleared, and the download fails.
Warning MessageParameter error (received command parameter is illegal), error code: 38752
Processing Procedure 1、Reinsert back N1SCC to download the recovery service;
2、Upgrade the spare cross EXCSA from 3.19 to 8.13, and invert the cross to the 8.13 version of the veneer;
3、Updraw the original main cross EXCSA with the version of 3.19 (keep it for the eventuality of recovering the service);
4、Replace the N1SCC with the N3GSCC to download the data successfully;
5、Upgrade the network element to the matching version.
2、Upgrade the spare cross EXCSA from 3.19 to 8.13, and invert the cross to the 8.13 version of the veneer;
3、Updraw the original main cross EXCSA with the version of 3.19 (keep it for the eventuality of recovering the service);
4、Replace the N1SCC with the N3GSCC to download the data successfully;
5、Upgrade the network element to the matching version.
Root CauseThere is a strict strong matching relationship between NG-SDH versions, and the span between R3 and R8 versions is too large, which leads to the failure of cross-checking when downloading, resulting in the failure.
Suggestions and Summary1, the operation must be in strict accordance with the guide, such as version, veneer and other discrepancies, be sure to confirm clearly;
2, NG-SDH version or need to be strictly version supporting relationship, as far as possible to unify.
2, NG-SDH version or need to be strictly version supporting relationship, as far as possible to unify.
END
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