Re: ITU-T Dubai Meeting
mrex@sap.com (Martin Rex) Tue, 07 August 2012 07:46 UTC
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Subject: Re: ITU-T Dubai Meeting
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To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Date: Tue, 07 Aug 2012 09:46:01 +0200
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From: mrex@sap.com
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Brian E Carpenter wrote: [ Charset UTF-8 unsupported, converting... ] > On 06/08/2012 23:02, Martin Rex wrote: > > Steven Bellovin wrote: > >> Randy Bush wrote: > >>> whatever the number of address bits, if it is fixed, we always run out. > >>> memory addressing has been a cliff many times. ip addressing. ... > >> Yup. To quote Fred Brooks on memory address space: "Every successful > >> computer architecture eventually runs out of address space" -- and I heard > >> him say that in 1973. > > > > I'm wondering what resource shortage would have happened if IPv6 > > had been massively adopted 10 years earlier, and whether we would have > > seen the internet backbone routers suffer severely from the size > > of the routing tables, if every single home customer (DSL subscriber) > > would have required a provider-independent IPv6 network prefix rather > > than a single, provider-dependent IPv4 IP Address. > > That was never a likely scenario (and still isn't). PA prefixes are still > the norm for mass-market IP, regardless of version number. IPv6 PA prefixes result in that awkward renumbering. Avoiding the renumbering implies provider independent network prefix. With IPv4, you would have typically keept your IPv4 network address (the old class A, B & C from early 199x) even when changing network providers. To me, IPv6 PA prefixes look like a pretty useless feature (from the customer perspective). Either you want an provider-independent prefix to avoid the renumbering when changing providers, or you want some level of privacy protection and therefore a fully dynamic temporary DHCP-assigned IPv6 address (same network prefix for 10000+ customers of the ISP) and for use with NAT (again to avoid the renumbering). IPv6 renumbering creates huge complexity without value (for the customer). -Martin
- ITU-T Dubai Meeting Phillip Hallam-Baker
- Re: ITU-T Dubai Meeting Noel Chiappa
- Re: ITU-T Dubai Meeting SM
- Re: ITU-T Dubai Meeting David Conrad
- Re: ITU-T Dubai Meeting Steven Bellovin
- Re: ITU-T Dubai Meeting Phillip Hallam-Baker
- Re: ITU-T Dubai Meeting Doug Barton
- Re: ITU-T Dubai Meeting Steven Bellovin
- Re: ITU-T Dubai Meeting Doug Barton
- Re: ITU-T Dubai Meeting Dmitry Burkov
- Re: ITU-T Dubai Meeting Daniel Karrenberg
- Re: ITU-T Dubai Meeting Brian E Carpenter
- Re: ITU-T Dubai Meeting Patrik Fältström
- Re: ITU-T Dubai Meeting Ole Jacobsen
- Re: ITU-T Dubai Meeting David Conrad
- Re: ITU-T Dubai Meeting Mark Andrews
- Re: ITU-T Dubai Meeting Dmitry Burkov
- Re: ITU-T Dubai Meeting SM
- Re: ITU-T Dubai Meeting Daniel Karrenberg
- Re: ITU-T Dubai Meeting Randy Bush
- Re: ITU-T Dubai Meeting Steven Bellovin
- Re: ITU-T Dubai Meeting Arturo Servin
- Re: ITU-T Dubai Meeting Martin Rex
- Re: ITU-T Dubai Meeting Brian E Carpenter
- Re: ITU-T Dubai Meeting Martin Rex
- Re: ITU-T Dubai Meeting Brian E Carpenter
- Re: ITU-T Dubai Meeting Noel Chiappa
- RE: ITU-T Dubai Meeting Worley, Dale R (Dale)
- Re: ITU-T Dubai Meeting Yoav Nir
- Re: ITU-T Dubai Meeting Noel Chiappa
- Re: ITU-T Dubai Meeting Yoav Nir
- Re: ITU-T Dubai Meeting Noel Chiappa
- Re: ITU-T Dubai Meeting Yoav Nir
- Re: ITU-T Dubai Meeting Doug Barton
- Re: ITU-T Dubai Meeting Mark Andrews
- Re: ITU-T Dubai Meeting Martin Rex
- Re: ITU-T Dubai Meeting Doug Barton
- Re: ITU-T Dubai Meeting Doug Barton
- Re: ITU-T Dubai Meeting Martin Rex
- Re: ITU-T Dubai Meeting Brian E Carpenter
- Re: ITU-T Dubai Meeting Daniel Karrenberg
- Re: ITU-T Dubai Meeting David Conrad
- Re: ITU-T Dubai Meeting Arturo Servin
- Re: ITU-T Dubai Meeting Doug Barton
- Re: ITU-T Dubai Meeting Phillip Hallam-Baker
- Re: ITU-T Dubai Meeting Randy Bush
- Re: ITU-T Dubai Meeting Phillip Hallam-Baker
- Re: ITU-T Dubai Meeting Randy Bush
- Re: ITU-T Dubai Meeting Phillip Hallam-Baker
- Re: ITU-T Dubai Meeting Randy Bush
- Re: ITU-T Dubai Meeting Phillip Hallam-Baker
- Re: ITU-T Dubai Meeting Michael Richardson