802.1x Commands 493Syntax• dot1x port-control {auto | force-authorized | force-unauthorized}• no dot1x port-control• auto — Enable 802.1X authentication on the interface and cause the port to transition to theauthorized or unauthorized state based on the 802.1X authentication exchange between theswitch and the client.• force-authorized — Disable 802.1X authentication on the interface and cause the port totransition to the authorized state without any authentication exchange required. The port resendsand receives normal traffic without 802.1X-based authentication of the client.• force-unauthorized — Deny all access through this interface by forcing the port to transition tothe unauthorized state, ignoring all attempts by the client to authenticate. The switch cannotprovide authentication services to the client through the interface.Default Configurationforce-authorized.Command ModeInterface Configuration (Ethernet) mode.User Guidelines• It is recommended to disable spanning tree or to enable spanning-tree PortFast mode on 802.1x edgeports (ports in auto state that are connected to end stations), in order to get immediately to theforwarding state after successful authentication.ExamplesThe following example enables 802.1X authentication on the interface.dot1x re-authenticationThe dot1x re-authentication Interface Configuration mode command enables periodic re-authentication of the client. Use the no form of this command to return to the default setting.Syntax• dot1x re-authentication• no dot1x re-authenticationThis command has no arguments or keywords.Console (config)# interface ethernet g8Console (config-if)# dot1x port-control auto5400_CLI.book Page 493 Wednesday, December 17, 2008 4:33 PM
