RE: what problem is solved by proscribing non-64 bit prefixes?

[<michael.dillon at bt.com>]

> I'm aware of several IEEE link layers and none uses 64bit addresses. 
> IEEE tries to have them all 48bit.  Even non-IEEE (like USB) 
> tries to be 48bit.

Have you ever heard of EUI-64?
<http://standards.ieee.org/regauth/oui/tutorials/EUI64.html>

One notable IEEE protocol which uses EUI-64 is Firewire (IEEE 1394). For
more info see RFC 3146.

--Michael Dillon
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