Hi,
I'm getting this message ONLY with iOS devices. This is the scenario:
ClearPass 6.7.8.109113
802.1X Aruba Wireless Service
Authentication Source: Active Directory
Authentication Method: EAP-PEAP/EAP-MSCHAPv2
ClearPass joined in Domain
RADIUS Certificate generated from Windows CA
CA certificate added to Trust list
When iOS device connects everything looks fine on Access Tracker, but after a few seconds I get this message and TIMEOUT Alert for this Request. If the iOS device is rebooted I can connect without problem, but after a couple of hours I get this error again.