North American Network Operators Group
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RE: Re: Get as much IP space as you ever dreamed of, was: Re: Looking to buy IPv4 addresses from class C swamp

  • From: Stewart, William C (Bill), RTSLS
  • Date: Tue Apr 29 02:30:05 2003 
[Let's try this again without fat-fingering the Send button :-)]

Seems like an obvious case for using IPv6.
RFC2373 site-local addresses assign a /48, 
with 16 bits of subnet ID and 64 bits of host ID.
The average location probably doesn't have 2**16 extranets on one DMZ;
picking a random value usually yields one that nobody you're talking to 
is also talking to, so almost nobody needs to use NAT for this kind of thing,
assuming you plan to tunnel them.