We have guest wifi setup throughout our campus enviorment, occasionaly i get notified that guests cannot connect to the wifi, the only fix that i've found so far is to reboot the access point. We are running 6.5.1.1, 7905 controller and 325 AP. I have attached a screenshot of our vap profile for this ssid. If you have anymore questions or reccomendations please let me know. Thanks!