Name: Cisco Catalyst 3750-X
Brand: Cisco
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Catalyst 3750-X and 3560-X Switch Command Reference

OL-29704-01

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

authentication violation

Use the authentication violation interface configuration command to configure the violation modes that

occur when a new device connects to a port or when a new device connects to a port after the maximum

number of devices are connected to that port.

authentication violation {protect | replace | restrict | shutdown}

no authentication violation {protect | replace | restrict | shutdown}

Syntax Description

Defaults By default authentication violation shutdown mode is enabled.

Command Modes Interface configuration

Command History

Examples This example shows how to configure an IEEE 802.1x-enabled port as error disabled and to shut down

when a new device connects it:

Switch(config-if)# authentication violation shutdown

This example shows how to configure an 802.1x-enabled port to generate a system error message and to

change the port to restricted mode when a new device connects to it:

Switch(config-if)# authentication violation restrict

This example shows how to configure an 802.1x-enabled port to ignore a new device when it connects

to the port:

Switch(config-if)# authentication violation protect

This example shows how to configure an 802.1x-enabled port to remove the current session and initiate

authentication with a new device when it connects to the port:

Switch(config-if)# authentication violation replace

You can verify your settings by entering the show authentication privileged EXEC command.

protect Unexpected incoming MAC addresses are dropped. No syslog errors are

generated.

replace Removes the current session and initiates authentication with the new host.

restrict Generates a syslog error when a violation error occurs.

shutdown Error disables the port or the virtual port on which an unexpected MAC

address occurs.

Release Modification

12.2(53)SE2 This command was introduced.

12.2(55)SE The replace keyword was added.

Cisco Catalyst 3750-X Command Reference

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