01-11-2018 01:05 PM - edited 07-05-2021 08:05 AM
Hi,
I am currently trying to troubleshoot why a 3802i is staying in a low powered mode even with a 802.3at PoE injector attached. It is a deployment of around 12 APs with 6 of them remaining in that state.
Logs on the APs show CDP PSE negotiation timeouts. They also are showing "AC Adaptor (false)...802.3af (true).
I'm not sure how this is happening as the injectors are AT compliant. They are connected to a controller so all obtained the same global config. Same injectors used.
4 of the 6 worked initially but reverted to low power after dropping offline and having to be rebooted to regain management visbility. The other 2 have been in thay state from the beginning.
Other deployments have had this issue but started working once we rebooted by disconnecting the PoE.
I just feel the working ones are running on borrowed time and will fail eventually.
Hoping someone can shed some light on this. This involves a major customer and I would be extremely grateful for any assistance.
Jerome
01-11-2018 01:17 PM
01-11-2018 02:10 PM
01-11-2018 02:48 PM
01-12-2018 01:38 AM
01-12-2018 02:34 AM
01-12-2018 02:59 AM
No worries.
AP13#sh lldp inline
Power_Requested(mW) Power_Available(mW) Port_ID
Negotiation-failed Negotiation-failed
A working AP:
AP03#sh lldp inline
Power_Requested(mW) Power_Available(mW) Port_ID
Not-negotiated Not-negotiated
01-12-2018 01:40 PM
01-12-2018 03:18 PM
01-12-2018 03:20 PM
01-14-2018 04:59 AM
01-19-2018 01:22 AM
01-19-2018 02:12 PM
@Jerome N wrote:
We are currently ordering the exact model of PoE injector that Cisco defines should power 3800s.
Order 1 first to see if it works or not.
02-04-2019 12:39 AM
Hi Leo,
Is upgrading to 8.5.110.0 or beyond (proposing 8.5.140.0) is supposed to fix this? We have a 5508 running 8.2.166.0 with 3802i's and experiencing the same issue.
Thanks
Luke
02-04-2019 12:51 AM
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