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Spirent TestCenter: PX3 appliance showing Power Failure warning messages.

A PX3 appliance is showing Power Failure warnings constantly.  Please refer to the images below:


  • Mantis and Groot appliances running STC firmwares releases 5.34 and older.
The solution included:
  • Supporting clock stretching for devices marked as requiring clock stretching support.
  • Marking the devices on the PX3 chassis that require clock stretching, and fixing the peripheral daemon to dynamically determine the correct I2C bus numbers.
Root Cause
  • PX3 appliances didn't had clock stretching support untill 5.35.

Product : PX3,Spirent TestCenter