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− Performs unidirectional traffic control to deny traffic from the client. The HP devices support
only unidirectional traffic control.
Figure 21 Authorization state of a controlled port
802.1X-related protocols
802.1X uses the Extensible Authentication Protocol (EAP) to transport authentication information for the
client, the access device, and the authentication server. EAP is an authentication framework that uses the
client/server model. The framework supports a variety of authentication methods, including
MD5-Challenge, EAP-Transport Layer Security (EAP-TLS), and Protected EAP (PEAP).
802.1X defines EAP over LAN (EAPOL) for passing EAP packets between the client and the access device
over a wired or wireless LAN. Between the access device and the authentication server, 802.1X delivers
authentication information by using one of the following methods:
• Encapsulates EAP packets in RADIUS by using EAP over RADIUS (EAPOR), as described in "EAP
re
lay."
• Extracts authentication information from the EAP packets and encapsulates the information in
standard RADIUS packets, as described in "EAP termination."
Packet formats
EAP packet format
Figure 22 shows the EAP packet format.
Figure 22 EAP packet format
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