Configuring Periodic Re-Authentication; Manually Re-Authenticating A Client Connected To A Port - Cisco Catalyst 3750 Software Configuration Manual

Configuring 802.1x Authentication
You also need to configure some settings on the RADIUS server. These settings include the IP address
of the switch and the key string to be shared by both the server and the switch. For more information,
refer to the RADIUS server documentation.

Configuring Periodic Re-Authentication

You can enable periodic 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
re-authentication 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
Step 1
configure terminal
Step 2 interface interface-id
Step 3
dot1x reauthentication
Step 4
dot1x timeout reauth-period seconds
Step 5 end
Step 6
show dot1x interface interface-id
Step 7
copy running-config startup-config
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-period interface 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-id privileged EXEC command. This step is optional. If you want to
enable or disable periodic re-authentication, see the
on page
This example shows how to manually re-authenticate the client connected to a port:
Switch# dot1x re-authenticate interface fastethernet1/0/1
Catalyst 3750 Metro Switch Software Configuration Guide
8-14
Purpose
Enter global configuration mode.
Specify the port to be configured, and enter interface configuration mode.
Enable periodic re-authentication of the client, which is disabled by
default.
Set the number of seconds between re-authentication attempts.
The range is 1 to 65535; the default is 3600 seconds.
This command affects the behavior of the switch only if periodic
re-authentication is enabled.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
8-14.
Chapter 8 Configuring 802.1x Port-Based Authentication
"Configuring Periodic Re-Authentication" section
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