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3750X POE+ unable to provide enough power to APs

Hello guys,

I am trying to troubleshoot one of the clients 3750X POE+ with 12.2(55)SE5.  The APs that are connected to the 3750X are Motorola AP7131s.  This APs needs 25.5W.

I am have two 3560X POE+ with IOS 12.2(55)SE3 Universal and the other one is 15.0(2)SE2 universal.

In my lab I have lldp running, I was able to power on all 3 radios of my APs. I also tried to use power inline static max 25500, power inline consumption 25500, and power inline port 2x-mode and all of them works in my lab, but none of these commands work with 3750X switch on the client end.

The power supply they have has more power than the one I have in my lab, but for some reason their switch can't enable the 802.3at, and this causing all the APs to power down their 3rd radio and ge2 port.

The only thing I could think of now is the IOS version they have that causes the issue.  The APs are all working correctly when they were connected to POE Injector. The issue started when they migrated to 3750X POE stacked switch.

Would stacking the switches affect the POE+ ports?

Any input would be greatly appreciated

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5 REPLIES 5
Hall of Fame Community Legend

Re: 3750X POE+ unable to provide enough power to APs

Sorry, I'm no Moto user but can you explain what you mean by Ge2?

Are you saying that this AP has two Ethernet ports and both ports support PoE?

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Re: 3750X POE+ unable to provide enough power to APs

Hello Leo,

Ge2 is another gigabit port on the AP, but it is not POE port.
I only use Ge1 port which is PoE port.

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Hall of Fame Community Legend

3750X POE+ unable to provide enough power to APs

Try this:

1.  Remove:  power inline static max 25500;

2.  Remove:  power inline consumption 25500;

3.  Remove:  power inline port 2x-mode; and

4.  Add:  power inline auto max 30000

Re: 3750X POE+ unable to provide enough power to APs

We have tried every power inline command, one at the time, but no luck. The APs are getting 802.3af instead if 802.3at. According to the IT guy at the site the only POE devices that are connected to the switch are the 7 APs.

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Hall of Fame Community Legend

3750X POE+ unable to provide enough power to APs

Can you post the output to the command "sh power inline"?

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