Dell PowerConnect FCS624S Configuration Guide - Page 1260

34 How 802.1X port security works How 802.1X port security works This section explains the basic concepts behind 802.1X port security, including device roles, how the devices communicate, and the procedure used for authenticating clients. NOTE 802.1X Port Security cannot be configured on MAC Port Security-enabled ports. Device roles in an 802.1X configuration The 802.1X standard defines the roles of Client/Supplicant, Authenticator, and Authentication Server in a network. The Client (known as a Supplicant in the 802.1X standard) provides username/password information to the Authenticator. The Authenticator sends this information to the Authentication Server. Based on the Client's information, the Authentication Server determines whether the Client can use services provided by the Authenticator. The Authentication Server passes this information to the Authenticator, which then provides services to the Client, based on the authentication result. Figure 153 illustrates these roles. FIGURE 153 Authenticator, client/supplicant, and authentication server in an 802.1X configuration RADIUS Server (Authentication Server) Switch (Authenticator) Client/Supplicant Authenticator - The device that controls access to the network. In an 802.1X configuration, the PowerConnect device serves as the Authenticator. The Authenticator passes messages between the Client and the Authentication Server. Based on the identity information supplied by the Client, and the authentication information supplied by the Authentication Server, the Authenticator either grants or does not grant network access to the Client. 1218 PowerConnect B-Series FCX Configuration Guide 53-1002266-01