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Dear Eric,<br>
<br>
on the <a class="moz-txt-link-freetext" href="http://www.ipv6matrix.org">http://www.ipv6matrix.org</a> project we are also seeing rises
& falls depending on areas.<br>
We have attributed this to several potential causes:<br>
<br>
1. temporary allocation of IPv6 addresses & roll-back when faced
with a tech problem<br>
2. a less inter-connected IPv6 network thus affected by changes in
peering agreements & BGP routing. (this has been quite a
significant challenge)<br>
3. changes in hosting for some large content providers - this
sometimes happens when content providers strike a deal with another
hosting company or merge<br>
<br>
Kind regards,<br>
<br>
Olivier<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 23/10/2014 17:38, Eric Vyncke
(evyncke) wrote:<br>
</div>
<blockquote cite="mid:D06E7D10.2FF7F%25evyncke@cisco.com"
type="cite">
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<div>For a couple of weeks, it seems that Google IPv6 measurements
are heading down mainly for Europe. For example, here is a link
to a presentation of the Google measurements for several
European countries and USA. There is a clear drop in the last
days/weeks for European countries but not for USA.</div>
<div><br>
</div>
<div>This includes a big drop for my country (BE) :-O and I have
checked with all Belgian ISP and they have no explanation as for
them 'business as usual'. Apnic also does not show such a big
drop.</div>
<div><br>
</div>
<div>So, I am guessing either a 'bug' in Google measurements
infrastructure in Europe or could it be that the IPv6 latency to
Google has increased a lot so that Happy Eyeball prefers IPv4?
Recent measurement of dual-stack latency to <a class="moz-txt-link-abbreviated" href="http://www.google.com">www.google.com</a> from
several Belgian ISP gave 10% slower over IPv6.</div>
<div><br>
</div>
<div>Any clue will be welcome</div>
<div><br>
</div>
<div>-éric</div>
</blockquote>
<br>
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