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Power rests causes Software loss of ISU2 cards on RTN 950 V100R003C00SPC100

Publication Date:  2012-07-25 Views:  147 Downloads:  0
Issue Description
Many resets for some RTN 950 V100R003C00SPC100  due to power problems,  Caused ISU2 cards software loss and these cards didn't re-start causing related services to these cards to be down. 


Alarm Information
HARD_BAD  with parameter is 0x15 ,and SWDL_CHGMNG_NOMATCH alarms is reported.


Handling Process
We tried two methods:
1) Pull out the ISU2 board, and then restart the NE again, after the NE is in normal status both , then insert the ISU2 board again, to force the NE to re-copy the software files to the ISU2.

2) If the above method is not working we can re-install the software package to the NE by using the package loading method (as Upgrade operation).



 IF none of the above worked please Replace the ISU2.


Root Cause
The HARD_BAD  with parameter is 0x15 which means that the the DRV is not loaded successfully at that time, so there should be some files for isu2 board is lost or abnormal, then the verification is not passed when our equipment checks the version of the software in CF card and ISU2's flash, this will judged as the version is not equaled, so the SWDL_CHGMNG_NOMATCH alarm is reported.


Suggestions


If the software files is abnormal due to power problems and the NE is restart, then HARD_BAD or SWDL_CHGMNG_NOMATCH can be reported.

If this is happened:

1) Pull out the ISU2 board, and then restart the NE again, after the NE is in normal status both , then insert the ISU2 board again, to force the NE to re-copy the software files to the ISU2.

2) If the above method is not working we can re-install the software package to the NE by using the package loading method (as Upgrade operation).

3) Replace the ISU2.




END