[182081] in North American Network Operators' Group
Re: Dual stack IPv6 for IPv4 depletion
daemon@ATHENA.MIT.EDU (Matthew Kaufman)
Fri Jul 10 02:42:55 2015
X-Original-To: nanog@nanog.org
Date: Thu, 09 Jul 2015 23:42:57 -0700
From: Matthew Kaufman <matthew@matthew.at>
To: John Curran <jcurran@arin.net>
In-Reply-To: <8C616849-E018-4595-969B-54DE785632DC@arin.net>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On 7/9/2015 6:31 PM, John Curran wrote:
> On Jul 9, 2015, at 9:02 PM, Matthew Kaufman <matthew@matthew.at
> <mailto:matthew@matthew.at>> wrote:
>>> On Jul 9, 2015, at 4:07 PM, Owen DeLong <owen@delong.com
>>> <mailto:owen@delong.com>> wrote:
>>> ...
>>> You are correct… In order for 20% of Google’s traffic to come from
>>> IPv6 connected devices, there would generally need to be more than
>>> 20% of all devices connected over IPv6.
>>
>> That doesn't follow at all.
>>
>> One guy who has v6 and really loves youtube can account for most of it.
>
> Matthew -
>
> That would be the case if the measurements of “IPv6 users” were based
> on traffic or packet
> counts, but Google’s measurements are based on specific pairs of HTTP
> connection attempts
> (one IPv4, and one IPv6) and the ratio of those which are IPv6
> capable. The measurement
> methodology is documented in the Google research paper -
> <http://research.google.com/pubs/pub36240.html>
Still can be accounted for with *fewer* than "20% of all devices
connected over IPv6" (the opposite of Owen's claim). Possibly even far
fewer, if many "devices" don't bother to visit Google via HTTP.
I do find it interesting that Google (and other's) graphs show much
higher IPv6 penetration on weekends - I assume that's because
ISP-provided CPE + default OS configs get you better chances of IPv6
than you get using your IT department's machine image plus network
infrastructure. Anecdotally: I have yet to work regularly at a facility
that has IPv6 connectivity to the outside world from the WiFi networks
that serve employee laptops. (Though for several years in the late 2000s
I did get IPv6 addresses via RA and routing between floors (but not
beyond)).
Matthew Kaufman
