To paraphrase a post on this list a while ago (my apologies for lack of reference). There are two kinds of waste: - the first kind of waste is providing 'too many' subnets for someone; - the second kind of waste is leaving the space unallocated forever. If we choose the first option and somehow burn through the 35 trillion /48's out of the first /3 we're drawing from (ie, almost 5000 /48's for every person on the planet) then we can always reconsider how to be more conservative with the remaining 88% of unallocated IPv6 space. -----Original Message----- From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Faisal Imtiaz Sent: October-09-14 12:45 AM To: Mark Andrews Cc: NANOG Subject: Re: IPv6 Default Allocation - What size allocation are you giving out ======================================
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. =======================================
So, this is more of a 'opinion' / 'feel' (with all due respect) comment, and not something which has a (presently) compelling technical reasoning behind it ? 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