By default, the AAA subsystem of the Cisco switch is disabled. Prior to enabling the AAA subsystem, none of the required commands will be available as a configuration option. Here’s how you enable it:
Step 1. Enable Authentication, Authorization, and Accounting on the access switch(es):
An authentication method is required to instruct the switch on which group of RADIUS servers to use for 802.1X authentication requests.
Step 2. Create an authentication method for 802.1X:
C3560X(config)#aaa authentication dot1x default group radius
The method created in ...