802.1X Port-Based Authentication
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OmniAccess 5740 Unified Services Gateway CLI Configuration Guide
Alcatel-Lucent
802.1X OVERVIEW
The IEEE 802.1X standard, Port Based Network Access Control, defines a
mechanism for port-based network access control that makes use of the physical
access characteristics of IEEE 802 LAN infrastructure. It provides a means of
authenticating and authorizing devices attached to a LAN port that has point-to-
point connection characteristics. It also prevents access to that port when the
authentication and authorization fails.
The following diagram shows the deployment scenario of 802.1X. This diagram
shows the supplicant, authenticator, and authentication server in a 802.1X
network. The 802.1X requires one authenticator port. In the diagram, controlled
port and uncontrolled port are the logical port in Authenticator System. The
controlled port shown here is not authorized and therefore it is not allowing traffic.
The uncontrolled port in Authenticator system is basically used for sending/
receiving 802.1x control frame. Once authentication is successful, then the
controlled port will be open to access the service offered by authenticator.
Figure 15: 802.1X deployment scenario
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