I've got a couple sites that appear to have issues with EAP chaining, ISE 1.2 and Anyconnect client on windows 8 enterprise.
Basically the windows 8 machines authenticate intermittently and randomly but largely fail auth.
Often the client will work perfectly for a boot even after a few reboots etc and then might stop working. Other clients won't work at all no mater what settings you configure.
Outer Method - EAP-FASTv2
Inner Method - MSChapV2
ISE 1.2 with Patch 1 (latest)
Windows 8 Enterprise - with patch http://support.microsoft.com/kb/2743127
Anyconnect Client 3.1.0466 (latest)
Machine and User Auth Against AD.
Cert checks disabled for testing.
Clients using same configuration.xml file
Symptom is Anyconnect prompts for username / password instead of using existing credentials. Typing credentials doesn't work.
Logs show failed "anonymous" authentications or client EAP timeouts.