Planet WSD-800 User Manual page 60

Authentication Initiation and Message Exchange
The Switch or the client can initiate authentication. If you enable authentication on a port by using the dot1x
port-control auto interface configuration command, the Switch must initiate authentication when it determines
that the port link state transitions from down to up. It then sends an EAP-request/identity frame to the client to
request its identity (typically, the Switch sends an initial identity/request frame followed by one or more requests
for authentication information). Upon receipt of the frame, the client responds with an EAP-response/identity
frame.
However, if during bootup, the client does not receive an EAP-request/identity frame from the switch, the client
can initiate authentication by sending an EAPOL-start frame, which prompts the switch to request the client's
identity
NOTICE:
If 802.1X is not enabled or supported on the network access device, any EAPOL frames from the client are
dropped. If the client does not receive an EAP-request/identity frame after three attempts to start
authentication, the client transmits frames as if the port is in the authorized state. A port in the authorized
state effectively means that the client has been successfully authenticated.
When the client supplies its identity, the Switch begins its role as the intermediary, passing EAP frames between
the client and the authentication server until authentication succeeds or fails. If the authentication succeeds, the
Switch port becomes authorized. For more information, see the
section
The specific exchange of EAP frames depends on the authentication method being used. "Figure 2-43" shows a
message exchange initiated by the client using the One-Time-Password (OTP) authentication method with a
RADIUS server.
User's Manual of WSD-800 / WGSD-910/WGSD-1022C
"Ports in Authorized and Unauthorized States"
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