Cisco Catalyst 4500 Series Command Reference Guide

2-218
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
dot1x host-mode
dot1x host-mode
Use the dot1x host-mode interface configuration command on the switch stack or on a standalone switch
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 mode
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.
You can assign both voice and data VLAN dynamically from the ACS server. No additional
configuration is required to enable dynamic VLAN assignment on the switch.To enable VLAN
assignment, you must configure the Cisco ACS server. For details on configuring the ACS server for
voice VLAN assignment, refer to the “Cisco ACS Configuration for VLAN Assignment” section in the
Catalyst 4500 Series Switch Software Configuration Guide-Release, 12.2(52)SG.
multi-host Enables multiple-hosts mode on the switch.
single-host Enables single-host mode on the switch.
multi-domain Enables MDA on a switch port.
Release Modification
12.2(20)EWA Support for this command was introduced on the Catalyst 4500 series switch.
12.2(37)SG Added support for multiple domains.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E