On Thu, Apr 8, 2010 at 7:57 PM, John Palmer (NANOG Acct) <nan...@adns.net> wrote: > What I would need if I were to go with IP6 would be to have a parallel > address for every one of > my current addresses. Right now we have 2 - legacy /24's and one legacy /23 > - thats it. > > I'd just need the "equivalent" IP6 space.
John, IPv6 assignment is LAN-centric rather than address centric, so think about how many LANs you have. LANs are rigged to always be /64. Stateless autoconfiguration doesn't work right if they're bigger or smaller. You need a /64 for each LAN including the ones now served with RFC 1918 addresses. You'll want to set aside one /64 from which you'll assign /126's to your point to points and /128's to your router loopbacks. If you have downstream customers, even if they're just dialups, expect to assign at least a /60 to each one. Many folks recommend /56 or /48. Delegation on 4-bit boundaries is convenient in IPv6 the same way delegation on 8-bit boundaries is convenient in IPv4. Since your downstream customers may have an internal LAN and a DMZ, you'll want to provide at least two LANs by stepping up to the next 4-bit boundary above /64. ARIN details vary depending on whether or not your an ISP and whether you're connecting a single network or multiple sites independently connected to the Internet. I recommend you hire or befriend someone with experience interacting with ARIN who can go over your network's details with you. ARIN staff are friendly and helpful but there are some magic words and phrases that will get you the result you want and it can be hard to un-say the wrong thing. If you want to look before you leap, do a google search for "6to4" or get a free IPv6 tunnel via tunnelbroker.net. Regards, Bill Herrin -- William D. Herrin ................ her...@dirtside.com b...@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
