Dell S3100 Command Line Reference Guide for the Series 9.100.1 - Page 159

5 802.1X 802.1X is a port-based Network Access Control (PNAC) that provides an authentication mechanism to devices wishing to attach to a LAN or WLAN. Until the authentication, only extensible authentication protocol over LAN (EAPOL) traffic is allowed through the port to which a client is connected. After authentication is successful, normal traffic passes through the port. The Dell Networking OS supports remote authentication dial-in service (RADIUS) and active directory environments using 802.1X Port Authentication. Important Points to Remember Dell Networking OS limits network access for certain users by using virtual local area network (VLAN) assignments. 802.1X with VLAN assignment has these characteristics when configured on the switch and the RADIUS server. • If the primary RADIUS server becomes unresponsive, the authenticator begins using a secondary RADIUS server, if configured. • If no VLAN is supplied by the RADIUS server or if you disable 802.1X authorization, the port configures in its access VLAN after successful authentication. • If you enable 802.1X authorization but the VLAN information from the RADIUS server is not valid, the port returns to the Unauthorized state and remains in the configured access VLAN. This safeguard prevents ports from appearing unexpectedly in an inappropriate VLAN due to a configuration error. Configuration errors create an entry in Syslog. • If you enable 802.1X authorization and all information from the RADIUS server is valid, the port is placed in the specified VLAN after authentication. • If you enable port security on an 802.1X port with VLAN assignment, the port is placed in the RADIUS server assigned VLAN. • If you disable 802.1X on the port, it returns to the configured access VLAN. • When the port is in the Force Authorized, Force Unauthorized, or Shutdown state, it is placed in the configured access VLAN. • If an 802.1X port is authenticated and put in the RADIUS server assigned VLAN, any change to the port access VLAN configuration does not take effect. • The 802.1X with VLAN assignment feature is not supported on trunk ports, dynamic ports, or with dynamic-access port assignment through a VLAN membership. Topics: • dot1x critical-vlan • debug dot1x • dot1x auth-fail-vlan • dot1x auth-server • dot1x auth-type mab-only • dot1x authentication (Configuration) • dot1x authentication (Interface) • dot1x guest-vlan • dot1x host-mode • dot1x mac-auth-bypass • dot1x max-eap-req • dot1x max-supplicants • dot1x port-control 802.1X 159