Cisco Systems 3750E manual Configuring Periodic Re-Authentication, 10-29

Chapter 10 Configuring IEEE 802.1x Port-Based Authentication

Configuring IEEE 802.1x Authentication

Configuring Periodic Re-Authentication

You can enable periodic IEEE 802.1x client re-authentication and specify how often it occurs. If you do not specify a time period before enabling re-authentication, the number of seconds between attempts is 3600.

Beginning in privileged EXEC mode, follow these steps to enable periodic re-authentication of the client and to configure the number of seconds between re-authentication attempts. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface interface-id	Specify the port to be configured, and enter interface configuration mode.
Step 3
	dot1x reauthentication	Enable periodic re-authentication of the client, which is disabled by
		default.
Step 4
	dot1x timeout reauth-period {seconds	Set the number of seconds between re-authentication attempts.
	server}	The keywords have these meanings:
		• seconds—Sets the number of seconds from 1 to 65535; the default is
		3600 seconds.
		• server—Sets the number of seconds based on the value of the
		Session-Timeout RADIUS attribute (Attribute[27]) and the
		Termination-Action RADIUS attribute (Attribute [29]).
		This command affects the behavior of the switch only if periodic
		re-authentication is enabled.
Step 5
	end	Return to privileged EXEC mode.
Step 6
	show dot1x interface interface-id	Verify your entries.
Step 7
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To disable periodic re-authentication, use the no dot1x reauthentication interface configuration command. To return to the default number of seconds between re-authentication attempts, use the no dot1x timeout reauth-periodinterface configuration command.

This example shows how to enable periodic re-authentication and set the number of seconds between re-authentication attempts to 4000:

Switch(config-if)#dot1x reauthentication

Switch(config-if)#dot1x timeout reauth-period 4000

Manually Re-Authenticating a Client Connected to a Port

You can manually re-authenticate the client connected to a specific port at any time by entering the dot1x re-authenticate interface interface-idprivileged EXEC command. This step is optional. If you want to enable or disable periodic re-authentication, see the “Configuring Periodic Re-Authentication” section on page 10-29.

This example shows how to manually re-authenticate the client connected to a port:

Switch# dot1x re-authenticate interface gigabitethernet2/0/1

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		10-29