Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.6 - Page 941

If a valid authenticated RFC 3575 Disconnect-Request request is received from a configured server and the session cannot be found, the switch returns a Disconnect-NAK message with the 503 Session Context Not Found response code. Four additional types of CoA requests are supported: • Re-authenticate Session: Upon receipt of a re-authenticate request for a host currently authenticated by 802.1x, the switch sends an EAPOL EAP-Request/EAPIdentity Request to the host without de-authorizing the host. If the host is authenticated using MAB, the switch sends a RADIUS Access-Request to the authentication server using the same attributes as were used in the previously successful authentication. If session authentication is in progress when the switch receives the reauthenticate session command, the switch restarts the authentication sequence starting with the first configured method. • Session Termination: Upon receipt of a session termination request for a host currently authenticated by 802.1x, the switch terminates the session without disabling the port and denies access to the individual host. The termination may cause the host to attempt to re-authenticate on the port. If a valid and authenticated session termination request is received from a configured CoA client and the session cannot be found, the switch returns a CoA-NAK message with the 503 Session Context Not Found response code. • Disable Host Port: The disable host port request may be useful when a port is causing issues on the network. It administratively disables the port by bringing the link down. The administrator may re-enable the port using the no shutdown command. If a valid and authenticated disable host port request is received from a configured CoA client and the session cannot be found, the switch returns a CoA-NAK message with the 503 Session Context Not Found response code. If a valid and authenticated request is received from a configured CoA client and the disable host port is administratively disabled, a CoA- Security Commands 941