Clients roaming in and out of coverage area

Hi,
I am currently getting reports from my user base that they are having to re-authenticate every 5 min's. They claim this is happening when using our visitor network which is a webauth based setup with a 4 hour session time out. My thinking on this is that the user is roaming in and out of our coverage areas and thus having to reauthorise sooner than expected.
2 questions on this...
1. Does this sound like a likely explanation.
2. Is there any setting I can change to increase the timeout length that will allow a user to wonder in and out of the coverage area before being required to re-authenticate?
Kit list
WCS 7.0.220.0
WLC 4402, 4404, 5508, 2504
Software versions 6.0.199.4 to 7.0.220.0
AP's AIR-LAP1142N-E-K9
Thanks
Dylan

Dylan,
There are two timers especially if you use WebAuth.... The most important especially if the guest users are Apple devices, is the idle timer. This should be set to 2-4 hours depending... I usually set this to 2 hours so guest can grab lunch and don't have to login. The session timer is a hard timer and if you have that set to 4 hours, then every 4 hours they will have to login. The idle timer has to be set lower than the session.
Thanks,
Scott
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