iPads drop internet connection while retaining connection to ssid

[Will3]

So I have had a problem with iPads losing internet randomly during the day at an Elementary school. I have 2 C35 controllers with 3825 aps running firmware version 10.31.04.0009. It seems that everyday almost a bunch of classrooms have there iPads just start spinning while loading something. The iPads are still connected to the AP with good signal, but will not ping gateway or anything until I either disconnect and reconnect from the wifi or do a hard reset on the iPad. It has been a hard problem to trouble shoot because every time it happens I hear about it afterwards or they are working by the time I get there. This problem has become frustrating to teachers and students because it will happen during the middle of testing sometimes also.

I guess I am just wondering if anyone has had similar problems and come up with any solutions. I have opened tickets in the past for this. It seems we change something and it works for a couple days so we assume it is working but then I start hearing the same thing again.

Thanks for the help.

[John_Romero]

I am not using WPA so MFP doesn't apply. We are MAC authenticating. The Session Timeout seems to be a good option, where is that setting?

[Volker_Kull]

We figured out that IOS does not reauthenticate after leaving sleeping mode. Coming up on a different AP the session is still alive on the past AP. For this case we limit the session timeout to 30-60min . Than the IOS device is triggered to do a full reauthentication after sleeping mode. Br Volker

[John_Romero]

Where you set the Session Timeout?

[Evan_Kuckelheim]

Please make sure that your ap radio's are configured appropriately for the environment.

https://gtacknowledge.extremenetworks.com/articles/Q_A/What-are-the-best-radio-settings-for-my-envir...

[Steve_Ballantyn]

100% agree with this ... I made these recommended changes across the board a few months and it resolved a lot of glitches in my environment. Remember that "auto" settings with your AP's typically means "out of the box setting" not necessarily "the best setting for most people".