Wednesday, September 26, 2018

Cisco 2800 AP and poe+ injector

Wanted to share in case someone else stumbles across this. I am upgrading a number of APs from 1141s to 2800 APs. A good number of these APs are connected to switches that only support POE. Eventually these switches will get upgraded but for now we have to live with them. To get around the POE limit, we purchased some POE+ injectors from fs.com. When we first plugged them in, we noticed the Aps only negotiated to 15.4 watts for power and as such the radios wouldn't turn on. After a little bit of panic we figured out that we had to disable CDP and LLDP on the switchport to get the switch to stop advertising out its capabilities to the AP. Anyway if anyone else has this problem give this a shot and hope it works for you as well.



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