Related 
Commands
dot1x authentication (Interface) – enables dot1x on an interface.
dot1x authentication (Interface)
Enable dot1x on an interface; dot1x must be enabled both globally and at the interface level.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
dot1x authentication
To disable dot1x on an interface, use the no dot1x authentication command.
Defaults Disabled.
Command Modes INTERFACE
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the C-Series and S-Series.
Version 7.4.1.0 Introduced on the E-Series.
Related 
Commands
dot1x authentication (Configuration) – enables dot1x globally.
dot1x auth-fail-vlan
Configure an authentication failure VLAN for users and devices that fail 802.1X authentication.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
dot1x auth-fail-vlan vlan-id [max-attempts number]
To delete the authentication failure VLAN, use the no dot1x auth-fail-vlan vlan-
id
 [max-attempts number] command.
Parameters
vlan-id
Enter the VLAN Identifier. The range is 1 to 4094.
max-attempts 
number
(OPTIONAL) Enter the keywords max-attempts followed number 
of attempts desired before authentication fails. The range is 1 to 5. 
The default is 
3.
Defaults 3 attempts
Command Modes CONFIGURATION (conf-if-interface-slot/port)
Command History
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the C-Series, S-Series, and E-Series.
Usage 
Information
If the host responds to 802.1X with an incorrect login/password, the login fails. The switch 
attempts to authenticate again until the maximum attempts configured is reached. If the 
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