The World IPv6 Launch website has compiled a set of measurements at
http://www.worldipv6launch.org/measurements/. I'll take a quick look
at some of them here, with a focus on universities.
The "Network Operator measurements" include data collected by Google,
Facebook, and Yahoo! for access to their services on June 6th 2012
from the various
network operator participants registered for the event.
There were only 77 networks in total registered. I'm sure there
are a number of other qualified networks that could have provided
significant numbers of IPv6 users and traffic. I suspect the initial
requirement that network operator participants be able to demonstrate
that at least 1% of their traffic constitute IPv6 prior to the event
likely dissuaded some potential participants from registering.
Different views of the network operator measurement charts require
provide a direct URL link to them. Instead, in the discussion below,
I'm including the relevant screen captures.
View by Total Traffic
The default view presents the participating networks sorted by total
volume of IPv6 traffic measured, although the absolute volume number
is not disclosed. Several large ISPs lead the list, with Free Telecom
(France) occupying the top spot. AT&T (US), KDDI (Japan), RCS & RDS
(Romania), Comcast (US), and Verizon Wireless (US) round out the next
five. There is a significant disparity in the proportion of IPv6
traffic generated by those networks though, with Comcast seeing only
1.47% and Free seeing 17.35%. I suspect the numbers for Comcast will
go up significantly as they turn up IPv6 on more of their home network
customers during the coming year (the number was 1.5% on June 6th).
The US wireless carriers should also see their numbers go up as more
of their users switch to IPv6-enabled 4G/LTE cell phones.
It's great to see a number of US universities (including my own)
feature prominently in the top part of this list also - in ranked
order: Indiana University, University of Pennsylvania, Virginia Tech,
Louisiana State, and University of Iowa.
View by IPv6 Traffic Percentage
Sorting the table by the "IPv6 traffic percentage" column (the 3rd
column below) produces some very impressive looking numbers. In this
measure, universities start to dominate the rankings. The top two
spots are held by Virginia Tech and Louisiana State, for which close
to 60% of traffic constituted IPv6. Other notables include Marist
College (53%), Indiana University (49%), RPI (47%), Penn (32%),
University of Iowa (31%), Karlsruhe Institute of Technology (20%), &
University of Phillipines Diliman (12%). The effect of many of these
universities having large parts of their campus networks IPv6 enabled
and presumably large numbers of IPv6 enabled computers on those
networks undoubtedly had a lot to do with these results.
It would be interesting to see more detailed measurement data from
some of these extensively IPv6 enabled campuses about what proportion
of their total traffic is IPv6 (as opposed to the subset of traffic
only to a set of popular IPv6 enabled services). I hope to be able to
share some data from Penn in the near future - we're currently dealing
with some IPv6 traffic accounting bugs with a router vendor first. But
our initial calculations are that we were seeing IPv6 account for 8 to
10% of the total traffic traversing the campus border during peak
hours of the day. Even though the vast majority of the Internet is not
IPv6 enabled, the existence of a number of popular and high-traffic
generating services (Google, YouTube!, Netflix, etc) are likely
skewing the numbers in favor of IPv6.