my wireless network consists in 3 WLC 4402 which manage 40 APs.
I have a fourth WLC which I installed on my DMZ for guest vlan anchoring and web autentication.
Everiting works fine but I have a problem:
If my client associates with an AP and then I authenticate I'm ready to make traffic. As soon as my client roams to an AP managed by a differnt WLC I need to authenticate again. If I roam back to the first AP i need to reauthenticate.
In my guest WLAN I use WEB authentication provided by the internal web server of the Anchor WLC.
On the WLAN said, change the session timeout to what you require. That should fix the issue you are having.
Here is my findings I have attached. This should fix your issue. Fisrt thing to do is change the VIP of wlc1, wlc2 and wlc3 to 188.8.131.52 and then reboot the wlc's. You can keep the wlcanchor VIP as 184.108.40.206. Look at the other suggestions I posted.