Understanding Ieee 802.1X Port-Based Authentication - Cisco WS-C3020 Software Configuration Manual

Catalyst blade switch for hp
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Configuring IEEE 802.1x Port-Based
Authentication
This chapter describes how to configure IEEE 802.1x port-based authentication on the switch.
IEEE 802.1x authentication prevents unauthorized devices (clients) from gaining access to the network.
Note
For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release and the "RADIUS Commands" section in the Cisco IOS Security Command
Reference, Release 12.2 from the Cisco.com page under Documentation > Cisco IOS Software > 12.2
Mainline > Command References
This chapter consists of these sections:

Understanding IEEE 802.1x Port-Based Authentication

The IEEE 802.1x standard defines a client-server-based access control and authentication protocol that
prevents unauthorized clients from connecting to a LAN through publicly accessible ports unless they
are properly authenticated. The authentication server authenticates each client connected to a switch port
before making available any services offered by the switch or the LAN.
Until the client is authenticated, IEEE 802.1x access control allows only Extensible Authentication
Protocol over LAN (EAPOL), Cisco Discovery Protocol (CDP), and Spanning Tree Protocol (STP)
traffic through the port to which the client is connected. After authentication is successful, normal traffic
can pass through the port.
These sections describe IEEE 802.1x port-based authentication:
OL-8915-03
Displaying IEEE 802.1x Statistics and Status, page 8-44
Device Roles, page 8-2
C H A P T E R
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
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