I have an interesting issue. I am running a 4500 with 1300W power supplies. We have IP Cameras and Cisco APs being powered by this switch. I have one AP that will not power up. It powers up with an A/C adapter just fine. I took the AP to another POE switch and it powered up just fine. So, I was thinking it was a PoE issue.
Checking the syslogs, I found the following:
Interface Gi5/36: inline power denied. Reason: Insufficient inline power, requested(17303) available(10018)
So this syslog basically is telling me that there isn't enough power, which is fine, I do have 50 devices being powered. They are a mix of Cisco and non-cisco devices.
However, when I look at the power info, it appears that there should be enough power left to power up a 15.4 Watt AP.
Power Summary Maximum
(in Watts) Used Available
---------------------- ---- ---------
System Power (12V) 590 617
Inline Power (-50V) 683 710
Backplane Power (3.3V) 0 0
---------------------- ---- ---------
Total 1273 (not to exceed Total Maximum Available = 1300)
It appears that I have 15 watts available.
Available:710(w) Used:683(w) Remaining:27(w)
Interface Admin Oper Power(Watts) Device Class
From PS To Device
--------- ------ ---------- ---------- ---------- ------------------- -----
Gi5/36 auto off 0.0 0.0 n/a n/a
Interface AdminPowerMax AdminConsumption
(Watts) (Watts)
---------- --------------- --------------------
Gi5/36 15.4 15.4
So, I am just trying to figure out why the switch won't power up this AP. Now, I do have an injector so, I have a work around but I am wanting to understand whey the switch appears to be giving me conflicting information. Either that, or I am not understand the output of the sh power commands correctly.
