Hi I just wanted to add what I have found regarding WCS and the guest feature.
-There are two ways to configure a "local net user". The first is a static guest ID that has the "guest" flag off. This means that the client's session will not timeout. The second is to specify the "guest" user checkbox and give it a timeout value in seconds.
This should let you control how long a user is logged in.
From the WLC login, go to SECURITY --> LOCAL NET USERS --> then click on NEW. From there you can specify a user ID and also set that optional guest user box. If you click on the Guest User box then you will see a timeout field.
With my guest account set to not be a guest user (no timeout value), I have noticed the following.
1. If a guest gets disconnected, usually they will reassociate and still be able to log in.
2. If a guest has problems, I usually tell them to disable their wireless card, close all browser windows, and then reassociate to the network.