802.1X | 193
dot1x auth-server
c e s
Configure the authentication server to RADIUS.
Syntax
dot1x auth-server radius
Defaults
No default behavior or values
Command Modes
CONFIGURATION
Command
History
dot1x guest-vlan
c e s
Configure a guest VLAN for limited access users or for devices that are not 802.1X capable.
Syntax
dot1x guest-vlan vlan-id
To disable the guest VLAN, use the no dot1x guest-vlan vlan-id command.
Parameters
Defaults
Not configured
Command Modes
CONFIGURATION (conf-if-interface-slot/port)
Command
History
Usage
Information
802.1X authentication is enabled when an interface is connected to the switch. If the host fails to
respond within a designated amount of time, the authenticator places the port in the guest VLAN.
If a device does not respond within 30 seconds, it is assumed that the device is not 802.1X capable.
Therefore, a guest VLAN is allocated to the interface and authentication, for the device, will occur at
the next re-authentication interval (dot1x reauthentication).
If the host fails authentication for the designated amount of times, the authenticator places the port in
authentication failed VLAN (dot1x auth-fail-vlan).
Related
Commands
Version 7.6.1.0 Introduced on C-Series and S-Series
Version 7.4.1.0 Introduced on E-Series
vlan-id
Enter the VLAN Identifier.
Range: 1 to 4094
Version 7.6.1.0 Introduced on C-Series, E-Series, and S-Series
Note: Layer 3 portion of guest VLAN and authentication fail VLANs can be created
regardless if the VLAN is assigned to an interface or not. Once an interface is assigned a guest
VLAN (which has an IP address), then routing through the guest VLAN is the same as any
other traffic. However, interface may join/leave a VLAN dynamically.
dot1x auth-fail-vlan
dot1x reauthentication
show dot1x interface
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