AP-105 requesting to much power over PoE and switch shuts down port.

[HeyEddie]

We're seeing a very odd issue at a school where AP-105s are pulling more power than the port allows and so the switch shuts down the port.

Has anyone else experienced this issue? It just started on a handful of APs and I'm pretty sure it's an issue with the APs and not the switch.

Thanks,

[cjoseph]

Make sure hybrid spectrum analysis is not enabled in the radio profile.

[Constantin]

Here is another post on the forum in releation to the issue that you are facing : 

http://community.arubanetworks.com/t5/Aruba-Instant-Cloud-Wi-Fi/Aruba-IAP-105-and-Cisco-3750-Power-Controller-reports-power-Imax/m-p/130765#M3941

AND HERE is Aruba advising in a Field Buleting that this is an issue : 

http://community.arubanetworks.com/aruba/attachments/aruba/IAP/3936/1/Field%20Bulletin%20AP1311-1%20(AP-100%20Series%20PA).pdf

[ebicharri]

I am encountering this issue on a 3200 controller. We have with multiple AP-105's, and the controller is running code version 6.3.1.2. AP-mode is activated on all APs with no spectrum analysis. Only 1 of the AP-105's is affected. It is trying to draw a lot of power and the switch has shut down the port. Any advice as to why this is happening?

[cjoseph]

What kind of switch and how many APs do you have on it?

[ebicharri]

The switch is a Cisco 4507. We have 8 APs on the switch - 7x AP-105s, 1x AP-104.

[cjoseph]

We need more details:

How much does each AP consume?

What is the total?

Do you have hybrid spectrum analysis enabled?

[ebicharri]

The APs consume 15.4W each. 7 x 15.4 = 107.8W.

We do not have hybrid spectrum analysis enabled.

[cjoseph]

Do you have the output of "show power inline" from the switch?

Are these Instant APs or controller-based APs?

What version of Aruba Instant or Controller-based code is this?

[ebicharri]

---

@cjoseph wrote:

Do you have the output of "show power inline" from the switch?

Are these Instant APs or controller-based APs?

What version of Aruba Instant or Controller-based code is this?

---

It's a 3200 controller running code version 6.3.1.2.

All APs are campus APs.

Show power inline output on the port:

sw-4.#sh power inline gi7/26
Available:4800(w) Used:1174(w) Remaining:3626(w)

Interface   Admin   Oper             Power(Watts)               Device          Class
                                                   From PS   To Device
-----------   ------     -----------------  ----------     --------------   ----------------- -------

Gi7/26     auto      on                  16.6          15.4             Ieee PD         3

Interface   AdminPowerMax    AdminConsumption
                (Watts)                    (Watts)
----------    ------------------------   -----------------------

Gi7/26     30.0                        15.4

Below is the error we get from the switch on the port the AP is on:

051703: May 12 03:49:10.568 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051704: May 12 03:50:39.550 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051705: May 12 03:52:08.673 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051706: May 12 03:53:12.595 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051707: May 12 03:54:42.994 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051708: May 12 03:55:43.277 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051709: May 12 03:57:11.702 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051710: May 12 03:58:39.897 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051711: May 12 03:59:57.314 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051712: May 12 04:01:03.213 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051713: May 12 04:02:15.925 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.
051714: May 12 04:03:28.962 UTC: %C4K_ETHPORTMAN-3-INLINEPOWEROVERDRAWN: Inline powered device connected on port Gi7/26 exceeded its hardware protection threshold.