Hello,
If you want to configure WPA2-EAP encryption on your router's WiFi Access Point, navigate to "Network -> Wireless -> Wireless security" menu, select desired encryption and specify your Radius server's information.
If you want to configure router so that it would connect to existing WiFi Access Point, which is using WPA2-EAP:
- From "Network -> WAN" menu activate WiFi interface.
- Save the settings and scan nearby WiFi networks.
- Connect to any WiFi network (not with WPA2-EAP)
- From "Network -> Wireless" menu press "Edit" button on "Wireless Station Mode".
- From "Wireless security" menu you can configure all necessary connection parameters, including "EAP-TTLS" EPA protocol.