nanog mailing list archives
Re: IPv6 Default Allocation - What size allocation are you giving out
From: Mark Andrews <marka () isc org>
Date: Thu, 09 Oct 2014 16:02:37 +1100
In message <2083423091.131955.1412829918586.JavaMail.zimbra () snappytelecom net>, Faisal Imtiaz writes:
======================================Only short sighted ISP's hand out /56's to residential customers.I am curious as to why you say it is short sighted? what is the technical or otherwise any other reasoning for such statement ?256 is *not* a big number of subnets. By restricting the number of subnetsresidences get you restrict what >developers will design for. Subnets don't need to be scares resource. ISP's that default to /56 are making them a >sc ares resource. ======================================= So, this is more of a 'opinion' / 'feel' (with all due respect) comment, and not something which has a (presently) compelling technical reasoning behind i t ?
There are thousands of examples of things being designed for the lowest common denominator. There are thousand of examples of "this will never be reached" only to have the thing be reached. Every time this happens it becomes expensive to correct. It causes operational issues for those on the leading edge. Your home router should support thousands of internal routes and be able to hand out thousands of prefixes all in a $50 box. Memory is cheap. It doesn't require lots of cpu to support something like a house even with thousands of subnets. If /56 becomes the norm the boxes will end up being designed for 256 subnets rather than the thousands it should be designed for thousands the hardware is capable of supporting. This unfortunately is human nature.
Regards Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: Support () Snappytelecom net ----- Original Message -----From: "Mark Andrews" <marka () isc org> To: "Faisal Imtiaz" <faisal () snappytelecom net> Cc: "Sam Silvester" <sam.silvester () gmail com>, "NANOG" <nanog () nanog org> Sent: Thursday, October 9, 2014 12:40:07 AM Subject: Re: IPv6 Default Allocation - What size allocation are you givingoutIn message <482678376.131852.1412829159356.JavaMail.zimbra () snappytelecom net>, Faisal Imtiaz writes:A /60, /56, /52 or /48 allows the client to run multiple SLAAC subnets (16, 256, 4096 or 65536) and to have the reverse ip6.arpa zone delegated on a nibble boundary.Understood...There is plenty of address space even handing out /48's to everyone.Also Understood.Only short sighted ISP's hand out /56's to residential customers.I am curious as to why you say it is short sighted? what is the technical or otherwise any other reasoning for such statement ?256 is *not* a big number of subnets. By restricting the number of subnets residences get you restrict what developers will design for. Subnets don't need to be scares resource. ISP's that default to /56 are making them a scares resource. MarkFaisal Imtiaz Snappy Internet & Telecom-- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka () isc org
-- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka () isc org
Current thread:
- Re: IPv6 Default Allocation - What size allocation are you giving out, (continued)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Kenneth Finnegan (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mark Andrews (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mark Andrews (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out David Conrad (Oct 08)
- RE: IPv6 Default Allocation - What size allocation are you giving out Peter Rocca (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Karl Auer (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mark Andrews (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Gary Buhrmaster (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Hugo Slabbert (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Daniel Ankers (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Karl Auer (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Saku Ytti (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Saku Ytti (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mikael Abrahamsson (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)