Did you end up getting these units working with the Ubiquiti POE-50-60W?
I have a 3802i with Mobility Express loaded on it - but I'm getting the same issue:
Aug 10 02:16:50 brain: Power mode: Degraded/Reduced Power, power_detection: DC_adapter(FALSE), 802.3AF_POE(TRUE)
Aug 10 02:16:55 brain: Restart POE negotiation
Aug 10 02:16:56 brain: CDP PoE negotiation START
Aug 10 02:17:57 brain: CDP PoE negotiation FAILED !!
Aug 10 02:17:57 brain: LLDP PoE negotiation START
Aug 10 02:18:29 brain: LLDP PoE negotiation FAILED !!
In this mode, I can't bring up any of the radios, although I can SSH / browse / console into the device fine.
I'm just trying to use these with a dumb switch (no LLDP or CDP support), and the power injector to give the thing PoE.
I've also tried:
(Cisco Controller) >config ap power injector enable all override
... View more