You may not get link/activity until the AP's interface comes up, but the AP may still be requesting power and booting. I'd get one attached to a console cable and see what happens. If you're using a Cisco switch, the "show power inline" command will tell you if power is being supplied/requested.
Jeff On 8/17/18, 11:17 AM, "The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Sam Ziadeh" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU on behalf of szia...@lsu.edu> wrote: POE switch (non cisco). We did take some of the failed units and plugged them into a Cisco POE switch to rule out a switch issue. We did not check the console port of the AP, but the port on the switch was not lighting up either. -Sam -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> On Behalf Of Jeffrey D. Sessler Sent: Thursday, August 16, 2018 7:59 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Cisco AP2800 failure rate I’ve got a metric ton of 3800’s and 2800’s spanning FCS (first customer ship) to less than a month old and have had zero failures. I agree with one of the other posters that even with no lights displayed, there can be action on the console port. Was the initial failure when connected to a POE switch or using an injector? Cisco switches/injectors or third-party? Jeff From: "wireless-lan@listserv.educause.edu" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> on behalf of Sam Ziadeh <szia...@lsu.edu> Reply-To: "wireless-lan@listserv.educause.edu" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Date: Thursday, August 16, 2018 at 7:39 AM To: "wireless-lan@listserv.educause.edu" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] Cisco AP2800 failure rate Is anyone else seeing a high rate of Cisco AP 2800 failures? Out of a batch of ~500 recently installed Aps, we have had roughly 70 fail. Some were online for a month, but some only a few days. Typically they will fail after a powercycle or loss of power. We are working with Cisco on this, but I’m curious if this is a more wide spread problem. ------------------------------------------------------------- Sam Ziadeh Manager, Network Engineering & Architecture University Networking & Infrastructure Information Technology Services Louisiana State University (225) 578-0074 szia...@lsu.edu <mailto:szia...@lsu.edu> ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.