Dual stack statistics?

Eric Vyncke (evyncke) evyncke at cisco.com
Tue Jan 29 09:51:07 CET 2013

Assuming that this is about 6lab about content statistics. A couple of points:

1)     It only counts web access and we know that other types of traffic exist on the Internet

2)    It is based on the per country Alexa list, e.g. for Belgium: http://www.alexa.com/topsites/countries;0/BE This is the list of visited web sites by viewers located in the country. E.g., no wonder that the top-10 Belgian sites are the Google, Youtube, Facebook and Yahoo!

3)    We collect the top-500 of those web sites and assign a weight based on the ranking, this is more magic than science here to select the exponential law parameters... IMHO we have put too much weigh on the top-10

4)    Then the usual trick of DNS + connecting over HTTP. Which in some cases is tricky as well... A response code of 200 then this is fine... but a "page not found" is also (for fbcdn.net which does not have any public home page) but for "service temp unavailable" or "unsupported method"... We currently say that any response code received OVER IPv6 is good.

5)    Then we sum up the weights of the 'good' and 'bad' sites

BTW, you may always contact 6stats-feeback at cisco.com<mailto:6stats-feeback at cisco.com> for more discussion (I took the liberty to add this alias in cc)

Hope this helps


From: ipv6-ops-bounces+evyncke=cisco.com at lists.cluenet.de [mailto:ipv6-ops-bounces+evyncke=cisco.com at lists.cluenet.de] On Behalf Of Lorenzo Colitti
Sent: lundi 28 janvier 2013 22:39
To: Tim Chown
Cc: IPv6 Ops list
Subject: Re: Dual stack statistics?

On 28 Jan 2013 23:14, "Tim Chown" <tjc at ecs.soton.ac.uk<mailto:tjc at ecs.soton.ac.uk>> wrote:
> based on what a typical home user does, 50% of that content (Google, FB, YouTube etc) is available via IPv6.

Does anyone know where they get this data from? Figuring out which websites are dual-stack is easy (just ask the DNS), but how do they know which websites users visit?
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