On Mon, Apr 19, 2010 at 7:03 AM, Edward Ned Harvey <lop...@nedharvey.com> wrote: >> From: discuss-boun...@lopsa.org [mailto:discuss-boun...@lopsa.org] On >> Behalf Of da...@lang.hm >> >> I know that the people pushing IPv6 consider NAT evil and want to >> make it impossible. > > Reference please? I never heard anything like that. I would agree that > it's generally not expected to be encouraged. But made impossible? I call > BS.
There are certainly people in the IETF that are anti-NAT. They've been making their case for quite some time, including http://www.faqs.org/rfcs/rfc1627.html (which I agree with). Are they making it difficult for people to use NAT with IPv6? Yes. When people come up with a reason to do NAT+IPv6, they run to make sure the need is fixed some other way. For example, http://www.faqs.org/rfcs/rfc3041.html Are they making it impossible? Well, it depends on where "difficult" stops and "impossible" begins. > FWIW, I'll half way agree, which is to say, there's no point to IPv6 if > you're going to continue NAT. Because if you're using NAT, there isn't an > organization in the world that's too large to fit in 10.0.0.0/8 You are 100% for the general case. However, 16 million IP addresses isn't a lot for massive clusters. Subnetting removes a lot of the efficiencies that you'd expect. IP addresses are not hotdogs. Hotdogs are sold 10 hot dogs come ten to a package while buns come in eight or 10 to a package. If you buy both in bulk it doesn't matter. You can make them match up as long as you can calculate a greatest common multiplier. On the other hand... Subnets come in powers of two and racks hold 40 or 80 machines. The nearest power of two is 64 or 128. Both give you a 65% efficiency. Subtract out other inefficiencies and overheads for the transit networks you need to connect so many machines. 10/8 doesn't look so big any more. (Oh, and now you need a NAT table bigger than will fit in RAM.) Tom -- http://EverythingSysadmin.com -- http://www.TomOnTime.com Computer and network administrators... Spread the word! LOPSA New Jersey Professional IT Community Conference New Brunswick, NJ, May 7-8, 2010 -- http://picconf.org _______________________________________________ Discuss mailing list Discuss@lopsa.org http://lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
