User Manual

User’s Manual of LRP-822CS/LRP-1622CS
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Figure 4-9-2 EAP Message Exchange
 Ports in Authorized and Unauthorized States
The switch port state determines whether or not the client is granted access to the network. The port starts in the unauthorized
gress traffic except for 802.1X protocol packets. When a client is
If a client that does not support 802.1X is connected to an unauthorized 802.1X port, the switch requests the client's identity. In
this situation, the client does not respond to the request, the port remains in the unauthorized state, and the client is not granted
access to the network.
In contrast, when an 802.1X-enabled client connects to a port that is not running the 802.1X protocol, the client initiates the
n the authorized
state
If the client is succes es to
authorized, and all fr emains
in the unauthori d witch can
transmit the request. If no response is received from the server after the specified number of attempts, authentication fails,
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
state. While in this state, the port disallows all ingress and e
successfully authenticated, the port transitions to the authorized state, allowing all traffic for the client to flow normally.
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 i
sfully authenticated (receives an Accept frame from the authentication server), the port state chang
ames from the authenticated client are allowed through the port. If the authentication fails, the port r
state, but authentication can be retried. If the authentication server cannot be reached, the sze
re
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.
unauthorized state.