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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
dot1x host-mode
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. Use the
multi-domain
keyword to enable multidomain
authentication (MDA) on an IEEE 802.1x-authorized port. Use the
no
form of this command to return
to the default setting.
dot1x host-mode
{
multi-host
|
single-host | multi-domain
}
no dot1x host-mode
[
multi-host
|
single-host | multi-domain
}
Syntax Description
Defaults
The default is single-host mode.
Command Modes
Interface configuration
Command History
Usage Guidelines
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 needs to 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.
Use the
multi-domain
keyword to enable MDA on a port. MDA divides the port into both a data domain
and a voice domain. MDA allows both a data device and a voice device, such as an IP phone (Cisco or
non-Cisco), on the same IEEE 802.1x-enabled port.
Before entering this command, make sure that the
dot1x port-control
interface configuration command
is set to
auto
for the specified port.
Examples
This example shows how to enable IEEE 802.1x authentication globally, to enable IEEE 802.1x
authentication on a port, and to enable multiple-hosts mode:
Switch(config)#
dot1x system-auth-control
Switch(config)#
interface gigabitethernet2/0/1
Switch(config-if)#
dot1x port-control auto
Switch(config-if)#
dot1x host-mode multi-host
multi-host
Enable multiple-hosts mode on the switch.
single-host
Enable single-host mode on the switch.
multi-domain
Enable MDA on a switch port.
Release
Modification
12.1(14)EA1
This command was introduced. It replaces the
dot1x multiple-hosts
interface configuration command.
12.2(35)SE
The
multi-domain
keyword was added.
