On 7/9/2015 6:31 PM, John Curran wrote:
On Jul 9, 2015, at 9:02 PM, Matthew Kaufman <matt...@matthew.at
<mailto:matt...@matthew.at>> wrote:
On Jul 9, 2015, at 4:07 PM, Owen DeLong <o...@delong.com
<mailto:o...@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
