Symptom
A OptiX OSN 6800 NE contains two subracks in a network. The master subrack houses two SCC boards. One is active and the other is standby. The software package on the active SCC board is correct and complete. The SCC board of the slave subrack is replaced with a new SCC board, whose software package version is the same as the current NE software version. After power-on, the SCC reports an SWDL_CHGMNG_NOMATCH alarm. In this process, no SCC board of the master subrack is inserted or removed.
Cause analysis
Regarding the function of software package auto-match, the SCC board has a software package version description file different from that of other board.
Regarding the software package auto-match function of the NG WDM products, the SCC board of the slave subrack is considered as an ordinary board. Therefore, the SCC unit of the slave subrack should have a board version description file in addition to the software package version description file. The new SCC board, however, provides only the software package version description file. The corresponding board software description file is generated only after the board is considered as an SCC board of the slave subrack, or has undergone a package loading process or a package auto-match process.
After the NE is powered on, the new SCC board replaced in the slave subrack lacks a board version description file. As a result, the slave subrack is considered as inconsistent with the version of the NE software and thus the SWDL_CHGMNG_NOMATCH (replace SCC) alarm is reported.
Procedure
1. Check whether the version of the software package for the SCC board is correct and make sure that the board version description file has been provided.
2. Load the correct software package successfully. The problem is solved.
