On Wed, Oct 01, 2008 at 04:36:57PM +0200, Jeroen Massar wrote:
> Alexandru Petrescu wrote:
> > For what it's worth,
> > 
> > Whenever statelessly auto-configuring an IPv6 address on Ethernet the
> > 10th and 11th bytes are always 'fffe', hardcoded.  These are lost bits.
> 
> The world has more devices than Ethernet. The Ethernet MAC -> EUI-64
> trick (thus your lost fffe bits) is just a trick. Take firewire for
> example which uses full EUI-64.

Well, Vista uses 'random' host addresses, 64-bit ones.   If the spec
had been different way back when, these could equally have been 32 or
48 bits instead.   But it wasn't.

-- 
Tim


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