Planet IGS-801T [97/120] User s manual of igs 801m

User’s Manual of IGS-801M

z Switch (802.1X device)—controls the physical access to the network based on the authentication status of the

server, requesting

ying a

on server.

When the switch receives EAPOL frames and relays them to the authentication server, the Ethernet header is

not

mat. When the switch receives frames from the authentication server, the server's frame header is

en encapsulated for Ethernet and sent to the client.

and Message Exchange

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

to up. It then sends an EAP-request/identity frame to the client to request its identity (typically, the

tion). 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

client. The switch acts as an intermediary (proxy) between the client and the authentication

identity information from the client, verifying that information with the authentication server, and rela

response to the client. The switch includes the RADIUS client, which is responsible for encapsulating and

decapsulating the Extensible Authentication Protocol (EAP) frames and interacting with the authenticati

stripped and the remaining EAP frame is re-encapsulated in the RADIUS format. The EAP frames are

modified or examined during encapsulation, and the authentication server must support EAP within the native

frame for

removed, leaving the EAP frame, which is th

 Authentication Initiation

The switch or the client can initiate authentication. If you

transitions from down

switch sends an initial identity/request frame followed by one or more requests for authentication informa

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 begin termediary, passing EAP frames between the client

and the authentication server until authentication succeeds or fails. If the authentication succeeds, the switch port

becomes authorized.

essage exchange initiated by the client using the One-Time-Password (OTP) authentication method with a RADIUS

s its role as the in

The specific exchange of EAP frames depends on the authentication method being used. “Figure 4-9-2” shows a

server.