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Abnormal Automatic Matching During OSN 6800 Package Loading

Publication Date:  2012-07-24 Views:  89 Downloads:  0
Issue Description
In the OptiX OSN 6800 package upgrade project, insert the upgraded SCC (from to in the subrack. Insert the OTU, amplifier board and other boards in the subrack. Enable the automatic matching function to upgrade these boards. Some time later, however, the OTU, amplifier board and other boards are still not upgraded and the SCC reports an SWDL_CHGMNG_NOMATCH alarm.
SCC version information: BIOS        8.20.03T02 20070413 17:07:41 inactive
ExtBios     9.20.04T02 20070808 22:25:16 active
NeSoft(D) 20070815 16:44:36
Platform(D) 5.00.08.B01c 20070706 12:22:35
Logic       (U109)120  Dsp               
Alarm Information
Handling Process
Insert the SCC and wait until the indicators are normal. Wait for 10 more minutes and then insert other boards.      
Root Cause
The replaced SCC software and package versions are inconsistent with previous versions. The replaced SCC mismatches software versions of other boards in the subrack. To avoid the alarm generated due to incorrect load and mismatch, the SCC version is higher than other board versions in the subrack.
At this time, the SCC is upgraded first and then other boards are upgraded. Other boards are inserted after all SCC indicators become normal. But other boards still mismatch the SCC.
For the previous SCC, after power-on, even if the indicators are normal, you should wait for 5 to 10 minutes until the SCC works stably. When using a toolkit to load packages, you can see a process from the normal state to the stable state.
If you insert other boards in the subrack in the waiting period, the loading information of the SCC is unstable. After the information becomes stable, other boards are started. Hence, inconsistent board versions are detected. If you insert other boards first and then the SCC, the same result can occur. As a result, automatic matching fails.       
Wait until the SCC state is normal and then insert other boards. Pay attention to the load sequence of the SCC and other boards.