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Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 10 Configuring IEEE 802.1x Port-Based Authentication
Configuring IEEE 802.1x Authentication
Configuring NAC Layer 2 IEEE 802.1x Validation
In Cisco IOS Release 12.2(25)SED or later, you can configure NAC Layer 2 IEEE 802.1x validation,
which is also referred to as IEEE 802.1x authentication with a RADIUS server.
Beginning in privileged EXEC mode, follow these steps to configure NAC Layer 2 IEEE 802.1x
validation. The procedure is optional.
This example shows how to configure NAC Layer 2 IEEE 802.1x validation:
Switch# configure terminal
Switch(config)# interface gigabitethernet2/0/1
Switch(config-if)# dot1x reauthentication
Switch(config-if)# dot1x timeout reauth-period server
Configuring Web Authentication
Beginning in privileged EXEC mode, follow these steps to configure authentication, authorization,
accounting (AAA) and RADIUS on a switch before configuring web authentication. The steps enable
AAA by using RADIUS authentication and enable device tracking.
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 guest-vlan vlan-id Specify an active VLAN as an IEEE 802.1x guest VLAN. The range is 1
to 4094.
You can configure any active VLAN except an internal VLAN (routed
port), an RSPAN VLAN, or a voice VLAN as an IEEE 802.1x guest
VLAN.
Step 4
dot1x reauthentication Enable periodic re-authentication of the client, which is disabled by
default.
Step 5
dot1x timeout reauth-period {seconds |
server}
Set the number of seconds between re-authentication attempts.
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 6
end Return to privileged EXEC mode.
Step 7
show dot1x interface interface-id Verify your IEEE 802.1x authentication configuration.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
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