Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

How to Configure 802.1x Port-Based Authentication
DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Switch# configure terminal
Step 2 interface interface-id
Example:
Switch(config)# interface
gigabitethernet2/0/2
Step 3 authentication violation {protect | replace |
restrict | shutdown}
Example:
Switch(config-if)# authentication violation
replace
Step 4 end
Example:
Switch(config-if)# end
Step 5 show running-config
Example:
Switch# show running-config
Step 6
copy running-config startup-config
Example:
Switch# copy running-config startup-config

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

1376
Purpose
Enters global configuration mode.
Specifies the port to be configured, and enter interface
configuration mode.
Use the replace keyword to enable MAC replace on the interface.
The port removes the current session and initiates authentication
with the new host.
The other keywords have these effects:
• protect: the port drops packets with unexpected MAC
addresses without generating a system message.
• restrict: violating packets are dropped by the CPU and a
system message is generated.
• shutdown: the port is error disabled when it receives an
unexpected MAC address.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.