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EAP messages encapsulation in ethernet frame,radius protocol

Unanswered Question
Jun 2nd, 2012
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Hi everybody.




Let say we have a network as shown below:




R1( supplicant)----ethernet--SW( authenticator)-----ethernet-----Radius server


Let say R1 sends EAP message to SW.  Does R1 encapsulate the eap message as:



Ethernet->EAPmessage.




Radius server uses udp ports.  When Sw( authenticator ) receives a EAP message, it simply relays it to radius server.  How does Sw encapsulate the EAP message in radius protocol i.e   does it look like this:


Ethernet->IP->udp->Radius->EAP message ?


==============================================================================


802.1x support  various EAP methods such as EAP-TLS,EAP-md5.   If we want to configure Cisco router say R1 as 802.1x supplicant, what is the default EAP method?

How can we change this default EAP method  to EAP-TLS on cisco router configured as 802.1x supplicant?


thanks and have a great weekend.

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