Planet IGS-801T [98/120] User s manual of igs 801m

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User’s Manual of IGS-801M

Figure 4-9-2

in the

unauthorized state. While in this state, the port disallows all ingress and egress traffic except for 802.1X protocol packets.

When a client is suc

flow normally.

If a client that does not su nt's

ntity. In this situation, the client does not respond to the request, the port remains in the unauthorized state, and the

ot granted access to the network.

equest

mes. Because no response is received, the client begins sending frames as if the port is in the

authorized state

rized, 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.

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

cessfully authenticated, the port transitions to the authorized state, allowing all traffic for the client to

pport 802.1X is connected to an unauthorized 802.1X port, the switch requests the clie

ide

client is n

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 r

for a fixed number of ti

If the client is successfully authenticated (receives an Accept frame from the authentication server), the port state chang

to autho