Configuring 802.1X Authentication - Cisco 2950 - Catalyst Switch Configuration Manual

Chapter 10 Configuring 802.1x Port-Based Authentication
Command
Step 3 dot1x default
Step 4
end
Step 5 show dot1x interface interface-id
Step 6 copy running-config startup-config

Configuring 802.1x Authentication

To configure 802.1x port-based authentication, you must enable AAA and specify the authentication
method list. A method list describes the sequence and authentication methods to be queried to
authenticate a user.
The software uses the first method listed to authenticate users. If that method fails to respond, the
software selects the next authentication method in the method list. This process continues until there is
successful communication with a listed authentication method or until all defined methods are
exhausted. If authentication fails at any point in this cycle, the authentication process stops, and no other
authentication methods are attempted.
To allow per-user ACLs or VLAN assignment, you must enable AAA authorization to configure the
switch for all network-related service requests.
This is the 802.1x authentication, authorization and accounting process:
A user connects to a port on the switch.
Step 1
Step 2 Authentication is performed.
Step 3 VLAN assignment is enabled, as appropriate, based on the RADIUS server configuration.
Step 4 The switch sends a start message to an accounting server.
Step 5 Re-authentication is performed, as necessary.
Step 6 The switch sends an interim accounting update to the accounting server that is based on the result of
re-authentication.
Step 7 The user disconnects from the port.
The switch sends a stop message to the accounting server.
Step 8
Beginning in privileged EXEC mode, follow these steps to configure 802.1x port-based authentication:
Command
Step 1 configure terminal
Step 2
aaa new-model
78-11380-10
Purpose
Reset the configurable 802.1x parameters to the default values.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enable AAA.
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Configuring 802.1x Authentication
10-19