nanog mailing list archives
Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)]
From: Paul Jakma <paul () jakma org>
Date: Fri, 6 Feb 2009 10:26:30 +0000 (GMT)
On Thu, 5 Feb 2009, Matthew Moyle-Croft wrote:
DHCP(v6). Setting the idea in people's heads that a /64 IS going to be their own statically is insane and will blow out provider's own routing tables more than is rational.
Routing table size will be a function of the number of customers - *not* the prefix length assigned to them (for so long as address space is sufficiently sparsely allocated that there's a 1:1 mapping from customer to prefix - which should be "for a long time" with IPv6).
So (within that longer term constraint) it doesn't matter if you're allocating your customer a /48, /56 or /64.
Indeed, what you're suggesting - smaller-than-64 allocations - *would* increase routing table sizes. With your proposal those indexes would increase greatly in depth (and possibly other space increases due to not being able to optimise for "hierarchical routing of bits past 64 is highly rare").
Think of IPv6 as a 64bit network address + host address. At least for now.
regards, -- Paul Jakma paul () clubi ie paul () jakma org Key ID: 64A2FF6A Fortune: If you don't have a nasty obituary you probably didn't matter. -- Freeman Dyson
Current thread:
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)], (continued)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Jack Bates (Feb 05)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Mark Andrews (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Seth Mattinen (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Nathan Ward (Feb 04)
- RE: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] TJ (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Matthew Moyle-Croft (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Jack Bates (Feb 05)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] John Schnizlein (Feb 05)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Paul Timmins (Feb 05)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Tony Finch (Feb 06)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Paul Jakma (Feb 06)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Matthew Moyle-Croft (Feb 06)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Jack Bates (Feb 06)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Matthew Moyle-Croft (Feb 06)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Bill Stewart (Feb 07)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Matthew Moyle-Croft (Feb 07)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] (IPv6-MW) Scott Howard (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] (IPv6-MW) Mark Andrews (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] (IPv6-MW) Matthew Moyle-Croft (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] (IPv6-MW) Mr. James W. Laferriere (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] (IPv6-MW) Matthew Moyle-Croft (Feb 04)