In message <2083423091.131955.1412829918586.JavaMail.zimbra@snappytelecom.net>, Faisal Imtiaz writes:
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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 >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 giving out
In 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.
Mark
Faisal 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