Cisco Catalyst 2950 Command Reference

2-87
Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
dot1x
dot1x
Use the dot1x global configuration command to enable IEEE 802.1x authentication globally. Use the no
form of this command to return to the default setting.
dot1x {system-auth-control} | {guest-vlan supplicant}
no dot1x {system-auth-control} | {guest-vlan supplicant}
Syntax Description
Defaults IEEE 802.1x authentication is disabled, and the optional guest VLAN behavior is disabled.
Command Modes Global configuration
Command History
Usage Guidelines You must enable authentication, authorization, and accounting (AAA) and specify the authentication
method list before enabling IEEE 802.1x authentication globally. A method list describes the sequence
and authentication methods to be queried to authenticate a user.
Before globally enabling IEEE 802.1x authentication on a switch, remove the EtherChannel
configuration from the interfaces on which IEEE 802.1x authentication and EtherChannel are
configured.
If you are using a device running the Cisco Access Control Server (ACS) application for IEEE 802.1x
authentication with EAP-Transparent LAN Services (TLS) and with EAP-MD5 and your switch is
running Cisco IOS Release 12.1(14)EA1, make sure that the device is running ACS Version 3.2.1 or
later.
You can use the guest-vlan supplicant keywords to enable the optional IEEE 802.1x guest VLAN
behavior globally on the switch. For more information, see the dot1x guest-vlan command.
Examples This example shows how to globally enable IEEE 802.1x authentication on a switch:
Switch(config)# dot1x system-auth-control
This example shows how to globally enable the optional guest VLAN behavior on a switch:
Switch(config)# dot1x guest-vlan supplicant
You can verify your settings by entering the show dot1x privileged EXEC command.
system-auth-control Enable IEEE 802.1x authentication globally on the switch.
guest-vlan supplicant Enable optional guest VLAN behavior globally on the switch.
Release Modification
12.1(14)EA1 This command was introduced.
12.1(22)EA2 The guest-vlan supplicant keywords were added.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz