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42 | Mobility Controller Configuration Campus Wireless Networks Validated Reference Design Version 3.3 | Design Guide
Authenticating with 802.1X
802.1X was developed to secure wired ports by placing the port in a ‘blocking’ state until authentication
completed using Extensible Authentication Protocol (EAP). EAP is a framework and allows many
different authentication types to take place within the EAP authentication system; Protected EAP
(PEAP) is most commonly used in wireless. In this mode, a TLS tunnel is created and user credentials
are passed to the authentication server within the tunnel. When the authentication is complete, the
client and the Mobility Controller both have copies of the keys used to protect the user session.
arun_057
Associate
Associate response
EAP request identity
EAP response
EAP exchange
APStation
802.11 Association 802.1X Authentication 4-way Handshake
Key1
Key2
Key3
Key4