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POE over budget on a B5 or C5 SecureStack

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TitlePOE over budget on a B5 or C5 SecureStack
Symptoms
Some ports with POE status of 'over budget', and not delivering power.
Current POE usage is relatively low. The number of ports using inlinepower is random
Environment
  • SecureStack
  • B5-Series
  • C5-Series
  • Firmware 6.81.01.0027
  • POE is not working properly
Cause
The default inlinepower management mode of real-time is the wrong setting for the switch or switches having the issue. The inlinepower management mode real-time ends up working harder trying to adjust to the number of request for changes and at any moment the inlinepower is out of service to any new inlinepower requests as well as some existing Poe devices
Resolution
Change the inlinepower management mode from real-time to class.

A workaround that 
Change POE threshold from default of 80% to 90%. This may resolve the issue; you can then change the threshold value back to 80%.

CLI syntax for changing PoE management mode:
set inlinepower management mode <OPTION> <UNIT_ID>
Example:
set inlinepower management mode class 2
Then change back to defaults:
set inlinepower Management mode real-time 2
Additional notes

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