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Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter Software Configuration Guide
OL-12189-01
Chapter 9 Configuring IEEE 802.1x Port-Based Authentication
Configuring IEEE 802.1x Authentication
Beginning in privileged EXEC mode, follow these steps to configure IEEE 802.1x accounting after AAA
is enabled on your switch. This procedure is optional.
Use the show radius statistics privileged EXEC command to display the number of RADIUS messages
that do not receive the accounting response message.
This example shows how to configure IEEE 802.1x accounting. The first command configures the
RADIUS server, specifying 1813 as the UDP port for accounting:
Switch(config)# radius-server host 172.120.39.46 auth-port 1812 acct-port 1813 key rad123
Switch(config)# aaa accounting dot1x default start-stop group radius
Switch(config)# aaa accounting system default start-stop group radius
Configuring a Guest VLAN
When you configure a guest VLAN, clients that are not IEEE 802.1x-capable are put into the guest
VLAN when the server does not receive a response to its EAP request/identity frame. Clients that are
IEEE 802.1x-capable but that fail authentication are not granted network access. The switch supports
guest VLANs in single-host or multiple-hosts mode.
Beginning in privileged EXEC mode, follow these steps to configure a guest VLAN. This procedure is
optional.
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
aaa accounting dot1x default
start-stop group radius
Enable IEEE 802.1x accounting using the list of all RADIUS servers.
Step 4
aaa accounting system default
start-stop group radius
(Optional) Enables system accounting (using the list of all RADIUS
servers) and generates system accounting reload event messages when the
switch reloads.
Step 5
end Return to privileged EXEc mode.
Step 6
show running-config Verify your entries.
Step 7
copy running-config startup-config (Optional) Saves your entries in the configuration file.
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.
For the supported port types, see the “IEEE 802.1x Authentication
Configuration Guidelines” section on page 9-24.
Step 3
switchport mode access
or
switchport mode private-vlan host
Set the port to access mode,
or
Configure the Layer 2 port as a private-VLAN host port.
Step 4
dot1x port-control auto Enable IEEE 802.1x authentication on the port.