3com S7906E Installationsanweisungen

 

1-8 

10)  When receiving the RADIUS Access-Request packet, the RADIUS server compares the password 

information encapsulated in the packet with that generated by itself. If the two are identical, the 

authentication server considers the user valid and sends to the device a RADIUS Access-Accept 

packet.  

11)  Upon receiving the RADIUS Access-Accept packet, the device opens the port to grant the access 

request of the client. After the client gets online, the device periodically sends handshake requests 

to the client to check whether the client is still online. By default, if two consecutive handshake 

attempts end up with failure, the device concludes that the client has gone offline and performs the 

necessary operations, guaranteeing that the device always knows when a client goes offline. 

12)  The client can also send an EAPOL-Logoff packet to the device to go offline unsolicitedly. In this 

case, the device changes the status of the port from authorized to unauthorized and sends an 

EAP-Failure packet to the client. 

 

In EAP relay mode, a client must use the same authentication method as that of the RADIUS server. On 

the device, however, you only need to execute the dot1x authentication-method eap command to 

enable EAP relay.  

 

In EAP termination mode, EAP packets are terminated at the device and then repackaged into the PAP 

or CHAP attributes of RADIUS and transferred to the RADIUS server for authentication, authorization, 

and accounting. 

 shows the message exchange procedure with CHAP authentication.