iPads drop internet connection while retaining connection to ssid

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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.
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Will

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Posted 9 months ago

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John Romero

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I am having this same issue, it also happens with Apple phones. I hope someone has a fix for this as I have a bunch of not so happy college students.


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JP

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What firmware are you running ?  
(Edited)
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John Romero

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10.21.03.0010
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Laura

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It could be the application itself? We have iPads in our classrooms and, I have seen the iPad connect to the wifi and can get out to Google, but when they open downloaded applications, it will freeze. Or the kids have tons of apps open at one time.
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Ronald Dvorak, Embassador

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What kind of privacy and authentication is set for the WLAN service and is MFP enabled or disabled.
What topology is used.
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Laura

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What does MFP do?
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Ronald Dvorak, Embassador

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I'd disable it as some clients don't "like" it.

Here a example...
https://community.extremenetworks.com/extreme/topics/some-clients-unable-receive-ip
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Evan Kuckelheim

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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...
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Steve Ballantyne

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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".
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Volker Kull

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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
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John Romero

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Where you set the Session Timeout?
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John Romero

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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?


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Volker Kull

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You can configure session timeout in the WLAN service >advanced. So you configure it per service and not for the entire system.

br
Volker
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Will

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I am going to try this, we were set at the default of 0. I will post back when I get results.
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Will

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So changing the session timeout did not help the problem. Most classrooms still have to either restart their iPads or just shut off and turn on the wifi to get the connection to wake up. It always happens after waking the iPads from sleep.
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Doug Hyde, Technical Support Manager

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Another setting we have seen cause issues with the apples is having UAPSD enabled. When the ipad comes out of sleep mode you need to manually connect back up to the SSID.