WPA2 Enterprise with 802.

To ensure that only PEAP authentication is used for network access through a wireless network using WPA2 Enterprise with 802.1X, enabling AAA override on an SSID allows individual client authentication requests to be modified by RADIUS server responses dynamically. By configuring an access policy in Cisco Identity Services Engine (ISE) that permits access solely when PEAP is used as the EAP authentication method, any user attempting to authenticate using EAP-FAST will be denied network access until their devices are configured correctly for PEAP usage. References: CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide