Configuring Ieee 802.1X Authentication Using A Radius Server - Cisco Catalyst 2950 Software Configuration Manual

Configuring IEEE 802.1x Authentication
Command
Step 4 show running-config
Step 5
copy running-config startup-config
To delete the specified RADIUS server, use the no radius-server host {hostname | ip-address} global
configuration command.
This example shows how to specify the server with IP address 172.20.39.46 as the RADIUS server, to
use port 1612 as the authorization port, and to set the encryption key to rad123, matching the key on the
RADIUS server:
Switch(config)# radius-server host 172.l20.39.46 auth-port 1612 key rad123
You can globally configure the timeout, retransmission, and encryption key values for all RADIUS
servers by using the radius-server host global configuration command. If you want to configure these
options on a per-server basis, use the radius-server timeout, radius-server retransmit, and the
radius-server key global configuration commands. For more information, see the
for All RADIUS Servers" section on page
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,
see the RADIUS server documentation.

Configuring IEEE 802.1x Authentication Using a RADIUS Server

In Cisco IOS Release 12.2(25)SEC, you can also configure IEEE 802.1x authentication with a RADIUS
server.
Catalyst 2950 LRE switches do not support NAC Layer 2 IEEE 802.1x authentication.
Note
Beginning in privileged EXEC mode, follow these steps to configure IEEE 802.1x authentication with a
RADIUS server. The procedure is optional.
Command
Step 1 configure terminal
Step 2 interface interface-id
Step 3
dot1x guest-vlan vlan-id
Step 4
dot1x reauthentication
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
9-16
Chapter 9
Purpose
Verify your entries.
(Optional) Save your entries in the configuration file.
8-29.
Purpose
Enter global configuration mode.
Specify the port to be configured, and enter interface configuration mode.
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 RSPAN VLAN, or a voice
VLAN as an IEEE 802.1x guest VLAN.
Enable periodic re-authentication of the client, which is disabled by
default.
Configuring IEEE 802.1x Port-Based Authentication
"Configuring Settings
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