DES-3526 / DES-3526DC Fast Ethernet Layer 2 Switch
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802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
Network access controlled port
Network access uncontrolled port
RADIUS
Server
Ethernet Switch
Figure 6- 71. Example of Typical Port-Based Configuration
Once the connected Client has successfully been authenticated, the Port then becomes Authorized, and
all subsequent traffic on the Port is not subject to access control restriction until an event occurs that
causes the Port to become Unauthorized. Hence, if the Port is actually connected to a shared media
LAN segment with more than one attached device, successfully authenticating one of the attached
devices effectively provides access to the LAN for all devices on the shared segment. Clearly, the
security offered in this situation is open to attack.
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