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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 8 Configuring IEEE 802.1x Port-Based Authentication
Configuring IEEE 802.1x Authentication
Configuring the Switch-to-RADIUS-Server Communication
RADIUS security servers are identified by their hostname or IP address, hostname and specific UDP port
numbers, or IP address and specific UDP port numbers. The combination of the IP address and UDP port
number creates a unique identifier, which enables RADIUS requests to be sent to multiple UDP ports on
a server at the same IP address. If two different host entries on the same RADIUS server are configured
for the same service—for example, authentication—the second host entry configured acts as the fail-over
backup to the first one. The RADIUS host entries are tried in the order that they were configured.
Beginning in privileged EXEC mode, follow these steps to configure the RADIUS server parameters on
the switch. This procedure is required.
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
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 7
dot1x port-control auto Enable IEEE 802.1x authentication on the port.
For feature interaction information, see the “IEEE 802.1x Configuration
Guidelines” section on page 8-10.
Step 8
end Return to privileged EXEC mode.
Step 9
show dot1x Verify your entries.
Step 10
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
radius-server host {hostname |
ip-address} auth-port port-number key
string
Configure the RADIUS server parameters.
For hostname | ip-address, specify the hostname or IP address of the
remote RADIUS server.
For auth-port port-number, specify the UDP destination port for
authentication requests. The default is 1812. The range is 0 to 65536.
For key string, specify the authentication and encryption key used
between the switch and the RADIUS daemon running on the RADIUS
server. The key is a text string that must match the encryption key used on
the RADIUS server.
Note Always configure the key as the last item in the radius-server
host command syntax because leading spaces are ignored, but
spaces within and at the end of the key are used. If you use spaces
in the key, do not enclose the key in quotation marks unless the
quotation marks are part of the key. This key must match the
encryption used on the RADIUS daemon.
If you want to use multiple RADIUS servers, re-enter this command.
Step 3
end Return to privileged EXEC mode.