Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 84

• Ports are in an unauthorized state by default. In this state, non-802.1X traffic cannot be forwarded in or out of the port. • The authenticator changes the port state to authorized if the server can authenticate the supplicant. In this state, network traffic can be forwarded normally. NOTE: The switch places 802.1X-enabled ports in the unauthorized state by default. Topics: • The Port-Authentication Process • Configuring 802.1X • Important Points to Remember • Enabling 802.1X • Configuring dot1x Profile • Configuring MAC addresses for a do1x Profile • Configuring the Static MAB and MAB Profile • Configuring Critical VLAN • Configuring Request Identity Re-Transmissions • Configuring a Quiet Period after a Failed Authentication • Forcibly Authorizing or Unauthorizing a Port • Re-Authenticating a Port • Configuring Dynamic VLAN Assignment with Port Authentication • Guest and Authentication-Fail VLANs • Multi-Host Authentication • Multi-Supplicant Authentication • MAC Authentication Bypass • Dynamic CoS with 802.1X The Port-Authentication Process The authentication process begins when the authenticator senses that a link status has changed from down to up: 1. When the authenticator senses a link state change, it requests that the supplicant identify itself using an EAP Identity Request frame. 2. The supplicant responds with its identity in an EAP Response Identity frame. 3. The authenticator decapsulates the EAP response from the EAPOL frame, encapsulates it in a RADIUS Access-Request frame and forwards the frame to the authentication server. 4. The authentication server replies with an Access-Challenge frame. The Access-Challenge frame requests that the supplicant prove that it is who it claims to be, using a specified method (an EAP-Method). The challenge is translated and forwarded to the supplicant by the authenticator. 5. The supplicant can negotiate the authentication method, but if it is acceptable, the supplicant provides the Requested Challenge information in an EAP response, which is translated and forwarded to the authentication server as another Access-Request frame. 6. If the identity information provided by the supplicant is valid, the authentication server sends an Access-Accept frame in which network privileges are specified. The authenticator changes the port state to authorized and forwards an EAP 802.1X 84