IPv6 Default Allocation - What size allocation are you giving out

Thu Oct 9 04:59:14 UTC 2014

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 at 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 at Snappytelecom.net 

----- Original Message -----
> From: "Mark Andrews" <marka at isc.org>
> To: "Faisal Imtiaz" <faisal at snappytelecom.net>
> Cc: "Sam Silvester" <sam.silvester at gmail.com>, "NANOG" 
> <nanog at 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 at 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 at isc.org
> 