Meraki AP POE Issue

[Dennb10]

I am getting the following error on 3 of my MR-45 APs....They are all plugged into the same Cisco 9300 switch....

Error: Device is not recommended to be used with PoE (802.3af) and performance cannot be guaranteed. Please connect AP to PoE+ (802.3at) power source. I have a lot of other APs just like this plugged in the 9300 and working very well.

thank you

[Kevin31]

The MR45s require 802.3at as the required power can be up to 18w, please see https://documentation.meraki.com/MR/MR_Overview_and_Specifications/MR45_and_MR55_Overview_and_Specif...

Running them on 802.3af (15.4w max) is essentially underpowering the devices depending on current load. 

[cmr]

@Kevin31 all 9300s that supply power are either PoE+ or UPoE

@Dennb10 it could be one of a few things please try the APs that show low power on a direct connection to the switch, if this works then test/repair/replace the patch cables and structured cabling.  If the cable has too high a resistance the power may not be getting through.  If the AP is no better connected directly to the switch try a different port, if still no better a different switch.  Also make sure that you aren't using more power than the switch can deliver, a 48 port switch full of PoE+ devices can be supplying 1000W or more and depending on the PSUs in the 9300 this may or may not be achievable.

[Bruce]

@Dennb10  What IOS-XE version is running on the Catalyst? Are all the other APs that are working all MR45s and are the other Catalysts running the same IOS-XE version? Are there any messages related to PoE in the Catalyst event log? I think you're probably better off troubleshooting this from the Catalyst side. I know there have been bugs in IOS-XE where the LLDP power negotiation doesn't work correctly with some devices.