I'm running a 3400 Controller on 6.4.2.6 with guests authenticating via captive portal. Guest accounts are created in the local DB and DHCP for Guest is done on the controller.
As of last week, I've been having some android users complaining that their phones are not able to get an address when connecting to my guest network (after being connected, leaving for lunch, and then coming back into the building typically).
When I look in the controller, I see their session and the controller thinks they have an IP. There is no traffic for the session, but it seems to be active. As soon as I kill their session, they can connect again.
The only change I could think of that may be causing this is that I changed the user idle timeout to 2 hours on my guest AAA profile. Prior to that, it was set to 10 minutes, I believe - and users were complaining that they had to log in several times a day.
Any help would be appreciated.
Thanks!