Dot1X Host-Mode - Cisco Catalyst 2950 Command Reference Manual

Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands

dot1x host-mode

Use the dot1x host-mode interface configuration command to allow a single host (client) or multiple
hosts on an IEEE 802.1x-authorized port that has the dot1x port-control interface configuration
command set to auto. Use the no form of this command to return to the default setting.
Syntax Description
multi-host
single-host
Defaults The default is single-host mode.
Command Modes Interface configuration
Command History Release
12.1(14)EA1
Usage Guidelines You can use this command to limit an IEEE 802.1x-enabled port to a single client or to attach multiple
clients to an IEEE 802.1x-enabled port. In multiple-hosts mode, only one of the attached hosts must be
successfully authorized for all hosts to be granted network access. If the port becomes unauthorized
(re-authentication fails, or an Extensible Authentication Protocol over LAN [EAPOL]-logoff message is
received), all attached clients are denied access to the network.
Before entering this command, make sure that the dot1x port-control interface configuration command
is set to auto for the specified interface.
Examples This example shows how to enable IEEE 802.1x authentication globally, enable IEEE 802.1x
authentication on an interface, and enable multiple-hosts mode:
Switch(config)# dot1x system-auth-control
Switch(config)# interface fastethernet0/1
Switch(config-if)# dot1x port-control auto
Switch(config-if)# dot1x host-mode multi-host
You can verify your settings by entering the show dot1x [interface interface-id] privileged EXEC
command.
Related Commands Command
show dot1x
OL-10102-01
dot1x host-mode {multi-host | single-host}
no dot1x host-mode [multi-host | single-host]
Enable multiple-hosts mode on the switch.
Enable single-host mode on the switch.
Modification
This command was introduced. It replaces the dot1x multiple-hosts
interface configuration command.
[interface interface-id]
Description
Displays IEEE 802.1x status for the specified interface.
Catalyst 2950 and Catalyst 2955 Switch Command Reference
dot1x host-mode
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