Reference Guide

Version 8.3.11.1 Introduced on the Z9000.
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)
dot1x guest-vlan
Configure a guest VLAN for limited access users or for devices that are not 802.1X capable.
Z9000
Syntax
dot1x guest-vlan vlan-id
To disable the guest VLAN, use the no dot1x guest-vlan vlan-id command.
Parameters
vlan-id Enter the VLAN Identifier. The range is from 1 to 4094.
Defaults Not configured.
Command Modes CONFIGURATION ( conf-if-interface-slot/port )
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.11.1 Introduced on the Z9000.
Version 7.6.1.0 Introduced on the C-Series, E-Series, and S-Series.
Usage
Information
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, occurs at the next reauthentication interval (dot1x reauthentication).
If the host fails authentication for the designated number of times, the authenticator places the
port in authentication failed VLAN (dot1x auth-fail-vlan).
NOTE: You can create the Layer 3 portion of a guest VLAN and authentication fail VLANs
regardless if the VLAN is assigned to an interface or not. After an interface is assigned a
guest VLAN (which has an IP address), routing through the guest VLAN is the same as any
other traffic. However, the interface may join/leave a VLAN dynamically.
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