[e2e] use of MAC addresses
touch at ISI.EDU
Thu Apr 13 14:50:52 PDT 2006
Fahad Dogar wrote:
> On 4/13/06, Joe Touch <touch at isi.edu> wrote:
> IMHO, we have to change these protocols because they have been
> designed keeping in view the presence of MAC addresses and how they
You need to change the protocols only if they don't do something you
need to do. What is it you need to do?
> If we were to redesign Internet and networking technologies
> (clean slate approach), do we need to have a different MAC address.
> Shouldn't IP address be sufficient? It is like assigning a globally
> unique name to every person and then asking him to maintain an
> additional name for 'local' identification.
The locally unique address is how you know you're different from someone
else before you get (or pick a random, possibly colliding) IP address.
The reason for that need is the MAC protocol - bridging, backoff,
spanning tree, etc. If you design a multi-access subnet that doesn't
need unique a-priori addresses, then you might be able to reuse IP
I.e., this needs to be motivated at the MAC layer.
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