800-Series f/w PoE Fails while showing near Maximum Power Consumption

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  • Updated 4 years ago
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Article ID: 16023 

800-Series, firmware

Have connected one or more Power over Ethernet (PoE) clients. 

Over time, any PoE usage is incorrectly seen by the switch to gradually but continually increase.
When per a 'show poe system' the perceived "Power Consumption" nears the "Power Limit" of 370 Watts (typically after 1-3 days), the power shedding feature disables PoE on higher-numbered ports.
A 'show poe ports' displays the true power consumption at all times. 

Upgrade to firmware or higher.
Release notes state, in the 'Changes and Enhancements in' section:
94   Corrected a POE issue where a switch would fail to provide power while showing power consumption of 372W. 

Pre-upgrade workaround: Rebooting the system will temporarily restore full PoE function.
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Posted 4 years ago

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