Cisco Catalyst 3550 User Manual

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Catalyst 3550 Multilayer Switch Command Reference
OL-8566-02
Chapter 2 Catalyst 3550 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 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.
dot1x host-mode {multi-host | single-host}
no dot1x host-mode [multi-host | single-host]
Syntax Description
Defaults The default is single-host mode.
Command Modes Interface configuration
Command History
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
multi-host Enable multiple-hosts mode on the switch.
single-host Enable single-host mode on the switch.
Release Modification
12.1(14)EA1 This command was introduced. It replaces the dot1x multiple-hosts
interface configuration command.
Command Description
show dot1x [interface interface-id] Displays IEEE 802.1x status for the specified interface.

Cisco Catalyst 3550 Specifications

General

Category	Switch
QoS	Yes
Form Factor	Rack-mountable
Manageable	Yes
RAM	64 MB
Model	Catalyst 3550
Uplink Ports	2 x GBIC (Gigabit Interface Converter) or SFP (Small Form-factor Pluggable)
Layer Support	Layer 3
VLAN Support	Yes
MAC Address Table Size	12000 entries
Routing Protocol	EIGRP
Features	QoS
Operating Temperature	32 to 113°F (0 to 45°C)
Operating Humidity	10 - 95% (non-condensing)
Ports	24 or 48 10/100 ports