My Client (Windows 7) can Login in the Wlan, is redirected to the ISE Website and is authenticated and authorized. But in the ISE in RadiusLivelog, i see a Radius error of CoA but i dont know why. The Radius communication before works fine between the WLC and ISE. I can see in Wireshark some Radius Paket and one Paket for CoA Request and Response. So there will be no Problem in the Network with Layer 2 and 3.