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Cisco Bug: CSCup05919 - 3850 - Power given, but State Machine Power Good wait timer timed out

Last Modified

Dec 16, 2020

Products (1)

  • Cisco Catalyst 3850 Series Switches

Known Affected Releases


Description (partial)

Some old model of Cisco IP phones do not get PoE immediately after being plugged. This is because power controller state machine times out.

%ILPOWER-3-CONTROLLER_PORT_ERR:  Power given, but State Machine Power Good wait timer timed out

Phones do come up eventually. This is reproducible with at least two Cisco 7970/7971 phones in my lab. I just bounce the port (shut-no shut)/PoE (power inline never/power inline auto) or move the PD to some other port to repro

has been seen with cisco 7970/7971 phones. Other models may see it too.

Related Community Discussions

C3850-48P and Pre-Standard POE
Hello, Does this switch stack support older phones that do not hav POE 802.2af standard? I have a 7940G that will not power with the 3850 model, newer phones do work though. I have tried to provide static power but this doesn't help
Latest activity: Mar 01, 2016
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