I kind of thought that was something that had already been worked out. Thats what I get for not paying close enough attention. ----- Original Message ----- From: "Deepak Jain" <deepak@ai.net> To: "Lee Howard" <lee@asgard.org>; "'Gary E. Miller'" <gem@rellim.com>; "'OwenDeLong'" <owen@delong.com> Cc: "'NANOG list'" <nanog@nanog.org> Sent: Wednesday, April 07, 2010 5:31 PM Subject: RE: ARIN IP6 policy for those with legacy IP4 Space Now I may be talking crazy... IIRC, all of IPv4 space maps to a section of IPv6 space. <mad hat on> If one has legacy IPv4 space, but actually talks IPv6 couldn't one announce a prefix much longer than a /64 to map them onto the IPv6 universe (assuming people would allow such craziness... perhaps on their IPv4 speaking routers) and originate/terminate traffic as normal? </mad hat off> Isn't this all left to the networks to enforce, as usual, but unlike the status quo, these are all valid allocations... Technical note: I know this breaks lots of IPv6 goodness (no need to enumerate it here). DJ