Need Multi-Auth Information

Prasenjit Manna pmanna at netd.com
Thu Mar 23 01:04:01 EST 2006


Jouni Malinen wrote:

>On Wed, Mar 22, 2006 at 12:49:08PM +0530, Prasenjit Manna wrote:
>
>  
>
>>I want to know some informations regarding How multi-auth works in wired 
>>setup.
>>1. What is the destination address of EAPOL packet? Is this unicast or 
>>group address?
>>    
>>
>
>IEEE 802.1X requires that the PAE group address (01:80:c2:00:00:03) is
>used as the destination address in wired Ethernet networks.
>  
>
I think this is for single-host or multi-host mode. But multi-auth mode, 
except the first packet from
either of the side(supplicant or authenticator),  all the other 
communication should be unicast.

>  
>
>>    In single-host mode, Authenticator sends EAPOL-Request/Identity 
>>packets to wire.
>>    The same this is applicable here for multi-auth mode? If it is like 
>>this, then what will be the destination
>>    address of the first packets from authenticator?
>>    
>>
>
>All EAPOL frames will be sent to the same group address, so this
>requires that there are separate ports (e.g., switch ports) that the
>authenticator can use for each supplicant.
>  
>
I am assuming a scenario, where one switchport and multiple clients are 
connected through a hub.
Whoever(client) has authenticator, they will get the access to the 
switchport. This is I am talking about
multi-auth mode.




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