I recently did an IAP installation for a client and PCs connecting to one of the SSIDs are experiencing connectivity issues.
I set this network up with three SSIDs: Fac-Staff, Student, and Student-Open. They are all configured as WPA2-Personal PSK, with a different key for each WLAN. I am having some difficulty attaching the error screen shots to this post, so I have included them below. The issue appears to be happening on Mac OSX, Ubuntu (linux), and Windows clients who are to this post.
Sometimes they can work for a while and then they get booted and receive the error message shown in the client attachment. Sometimes clicking refresh will allow them to access the site. There doesn't seem to be a time element. It has happened to almost all of the students at one point or another.
Any assistance would be greatly appreciated.