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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 9 Configuring IEEE 802.1x Port-Based Authentication
Configuring IEEE 802.1x Authentication
Enabling IEEE 802.1x Authentication
To enable IEEE 802.1x port-based authentication, you must enable authentication, authorization, and
accounting (AAA) and specify the authentication method list. A method list describes the sequence and
authentication method to be queried to authenticate a user.
To allow VLAN assignment, you must enable AAA authorization to configure the switch for all
network-related service requests.
Beginning in privileged EXEC mode, follow these steps to configure IEEE 802.1x port-based
authentication. This procedure is required.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
aaa new-model Enable AAA.
Step 3
aaa authentication dot1x {default}
method1
Create an IEEE 802.1x authentication method list.
To create a default list that is used when a named list is not specified in
the authentication command, use the default keyword followed by the
method that is to be used in default situations. The default method list is
automatically applied to all ports.
For method1, enter the group radius keyword to use the list of all
RADIUS servers for authentication.
Note Though other keywords are visible in the command-line help
string, only the default and group radius keywords are
supported.
Step 4
dot1x system-auth-control Enable IEEE 802.1x authentication globally on the switch.
Step 5
aaa authorization network {default}
group radius
(Optional) Configure the switch for user RADIUS authorization for all
network-related service requests, such as VLAN assignment.
Step 6
radius-server host ip-address (Optional) Specify the IP address of the RADIUS server.
Step 7
radius-server key string (Optional) Specify the authentication and encryption key used between
the switch and the RADIUS daemon running on the RADIUS server.
Step 8
interface interface-id Specify the port connected to the client that is to be enabled for IEEE
802.1x authentication, and enter interface configuration mode.
Step 9
swtichport mode access (Optional) Set the port to access mode only if you configured the
RADIUS server in Step 6 and Step 7.
Step 10
dot1x port-control auto Enable IEEE 802.1x authentication on the interface.
For feature interaction information, see the “IEEE 802.1x Configuration
Guidelines” section on page 9-12.
Step 11
end Return to privileged EXEC mode.
Step 12
show dot1x Verify your entries.
Check the Status column in the IEEE 802.1x Port Summary section of the
display. An enabled status means the port-control value is set either to
auto or to force-unauthorized.
Step 13
copy running-config startup-config (Optional) Save your entries in the configuration file.
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