On Mon, Oct 08, 2007 at 10:48:45PM -0700, Bernard Aboba wrote:
> >DHCP requests are broadcast, whereas EAPoL packets are not.
> 
> EAPoL packets are sent to a non-forwardable multicast address in wired 
> networks, and to a unicast address in IEEE 802.11.
> 
> >The first issue is simply that 802.1x does not traverse a switch.
> 
> Not so.  Forwarding of IEEE 802.1X frames is a frequently implemented 
> feature in switches.  For example, this feature is routinely supported on 
> low end switches and VOIP handsets with switch ports.

I'm wondering if it can work over wired networks where a
non-forwardable multicast address is used as the destination MAC
address of EAPoL frames.  How two Supplicants attached to such a
switch can run 802.1X where one Supplicant may receive EAPoL frames
intended to be received by the other one?

Yoshihiro Ohba

> 
> >A whole world of issues arise when you try break that part of 802.1x by 
> >having it traverse a switch as 802.1x is port authentication, not host 
> >authentication
> 
> Again, not true.  IEEE 802.1X switches today routinely support MAC address 
> state, not just port state.  In fact, this feature is supported within the 
> Cisco 65xx series switches.
> 
> 
> 
> 
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