nanog mailing list archives
Re: Rate of growth on IPv6 not fast enough?
From: William Herrin <bill () herrin us>
Date: Mon, 19 Apr 2010 16:52:30 -0400
On Mon, Apr 19, 2010 at 1:22 PM, Bryan Fields <Bryan () bryanfields net> wrote:
On 4/19/2010 10:14, Patrick Giagnocavo wrote:The eyeball ISPs will find it trivial to NAT should they ever need to do so however, something servers cannot do - you are looking at numbers, not operational considerations.LSN is not trivial. Here is some unverified calculations I did on the problem of scaling nat. Right now I'm using 42 translation entries in my nat table. Each entry takes up 312 bytes of FIB memory, which is ~12.7 Kib of data in the FIB. Mutiply this by 250k users and we have 3,124,237 KiB of FIB entries, or 3.1 GiB. This is not running any PtP programs or really hitting the network, I'm just browsing the web and typing this email to you.
Bryan, Is there some reason we believe we need to scale individual NAT systems beyond about 1000 users each in order to have the desired impact on address recapture/reuse? Growing towards 7B people in the world with, let's say, 4 connected client devices each, grouped 1000 per NAT box requires 7B * 4 / 1K = 28M or 1.7 /8's for the eyeball networks before structural overhead. Pushing a carrier NAT process shallow has its own set of complications (and certainly isn't trivial) but raw scalability doesn't look like one of the problems. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: Rate of growth on IPv6 not fast enough?, (continued)
- Re: Rate of growth on IPv6 not fast enough? joel jaeggli (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Simon Perreault (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Leo Bicknell (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Jack Bates (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Bryan Fields (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Florian Weimer (Apr 20)
- Re: Rate of growth on IPv6 not fast enough? Florian Weimer (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Owen DeLong (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Mark Smith (Apr 20)
- Re: Rate of growth on IPv6 not fast enough? Joe Maimon (Apr 20)
- Re: Rate of growth on IPv6 not fast enough? William Herrin (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Owen DeLong (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Perry Lorier (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Adrian Chadd (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? James Hess (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Jack Bates (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Joe Greco (Apr 19)
- Re: Rate of growth on IPv6 not fast enough? Jack Bates (Apr 20)
- Re: Rate of growth on IPv6 not fast enough? Dave Pooser (Apr 18)
- Re: Rate of growth on IPv6 not fast enough? Bill Bogstad (Apr 18)
- Re: Rate of growth on IPv6 not fast enough? joel jaeggli (Apr 18)