ipv6 addressing - non-routable equivalents?

[Bill Manning]

% On Sat, 30 Sep 2000, Bill Manning wrote:
% 
% > 	  If you have:  201:0600:0004:80cf::/48 and (remember) the
% > 	  bits from 65-128 are "reserved" for your MAC or e164 address,
% > 	  then you have /49 to /64 to carve up as subnets.
% > 	  16 delegation points, e.g. the functional equivalant of an
% > 	  IPv4 /16.  Does that help?
% 
% Is it really required that we use the MAC address in bits 64-128?  Ie.
% what prevents someone from just starting with some arbitrary number in the
% subnet field?  Or for that matter what really prevents subnetting beyond a
% /64?

The value does not have to be a MAC address. E164s are 
known to work. The idea is that it is roughly an invarient, globally 
unique number w/o topologocal significance. 

Some applications are using system calls designed along these "8+8"
boundaries.  But, other than the fact that some stuff won't work, there is 
nothing to prevent you from carving up your space as you see fit. :)

--bill