Administrator Guide

Version Description
7.4.1.0 Introduced on the E-Series.
dot1x guest-vlan
Configure a guest VLAN for limited access users or for devices that are not 802.1X capable.
C9000 Series
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 Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the C-Series, S-Series, and E-Series.
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 occurs at the next re-authentication
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: The layer 3 portion of guest VLAN and authentication fail VLANs can be created 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.
Related
Commands
dot1x auth-fail-vlan — configures a VLAN for authentication failures.
dot1x reauthentication — enables periodic re-authentication.
show dot1x interface — displays the 802.1X information on an interface.
1488 Security