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-boun...@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: supp...@snappytelecom.net ----- Original Message ----- > From: "Mark Andrews" <ma...@isc.org> > To: "Faisal Imtiaz" <fai...@snappytelecom.net> > Cc: "Sam Silvester" <sam.silves...@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.zim...@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: ma...@isc.org >
