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Chapter 4: Web-Based Management
112 GE-DS-242-PoE Managed Ethernet Switch User Manual
In contrast, when an 802.1X-enabled client connects to a port that is not running the
802.1X protocol, the client initiates the authentication process by sending the EAPOL-
start frame. When no response is received, the client sends the request for a fixed
number of times. Because no response is received, the client begins sending frames
as if the port is in the authorized state
If the client is successfully authenticated (receives an Accept frame from the
authentication server), the port state changes to authorized, and all frames from the
authenticated client are allowed through the port. If the authentication fails, the port
remains in the unauthorized state, but authentication can be retried. If the
authentication server cannot be reached, the switch can retransmit the request. If no
response is received from the server after the specified number of attempts,
authentication fails, and network access is not granted.
When a client logs off, it sends an EAPOL-logoff message, causing the switch port to
transition to the unauthorized state.
If the link state of a port transitions from up to down, or if an EAPOL-logoff frame is
received, the port returns to the unauthorized state.
System Configuration
802.1x makes use of the physical access characteristics of IEEE802 LAN
infrastructures in order to provide a means of authenticating and authorizing devices
attached to a LAN port that has point-to-point connection characteristics, and of
preventing access to that port in cases in which the authentication and authorization
process fails.
To enable 802.1x, from System \ System Information \ Misc Config then you still to fill
in the authentication server information:
Figure 4-65: System information \ Misc Configuration\ 802.1x Protocol