Wireless Access Points Upgrade

We upgraded some Cisco Access Points with newer Aruba Access Points (all PoE) and we noticed that after swapping the AP and reconnecting the ethernet cables, there would be no LED status lights at all on the system or the Radio LED indicator (AP Model 315 Aruba).  We had to switch to different modes to get back the system and radio lights.  Not sure why that would be the case. The switch port is still working as I tested with my laptop so why did we have to switch to different switch ports for the new Access Points to work?

We even power cycled the switch (due to different reason and I tried shut/no shut (in case the switch port went to err-disabled).

Does any know know why?

thank you!
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The switch port is still working as I tested with my laptop 
This tells that data over that port works, but bear in mind your laptop would not use POE. I have actually dealt with a switch where the whole problem was that POE kept somehow shutting off, but otherwise worked fine.

Having read your other question where you mentioned that you had to change the ports the access points were on...

Did you use the same ports the old access points were on? If not, then the ports you used at first probably had POE disabled, and secondarily might have also been configured for the wrong VLAN.

If they were the same ports, see below:

There could be multiple factors at play. 1) What model switches are the APs connected to? Could be an issue with too much power being drawn.
2) Is LLDP enabled in the switch so that the AP can properly negotiate the amount of power it may need?
3) Is IPM enabled? This is the least likely to be an issue because the worst that should happen is the USB ports get disabled.
8055730Author Commented:
The switch is a SG300 28P PoE switch and yes, think it is related to too much power being drawn from the new APs. And they were connected to the same switch ports as we replaced them from the ceiling tiles (just swapped with new APs and it didn't immediately work) until we connect to different switch ports.  Yes, LLDP is on as I could see the neighbor.

Will check on IPM as not sure how to enable this. Do you know how to enable this?
8055730Author Commented:
Ok, I found it.  It is done via CLI and the command is below:

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Are all of your phones powered by the switch as well?

You could...
A) get a dedicated switch for your access points.
B) upgrade the switch
C) get an online injector for the APs

A or C would probably be the better options.

As an experiment, disconnect about half of the access points and see if things work normally at that point. If so, then definitely go with one of the two options I just suggested.

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Andy BartkiewiczNetwork AnalystCommented:
A lot of new High End APs are using POE+ which draws more power then POE. I don't believe the Cisco 300 series switches support POE+
8055730Author Commented:
There are not he Cisco access points but the Aruba IAP 315 models.

Yes,  most likely was a power issue.
BTW - A good number of the SG300 series switches do support POE+. But it depends on exactly which model you have.
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