Google IPv6 measurements in Europe appear heading down...

Eric Vyncke (evyncke) evyncke at
Thu Oct 23 20:03:42 CEST 2014

With the link, it is probably better… still need some caffein,de,us,lu

From: Eric Vyncke <evyncke at<mailto:evyncke at>>
Date: jeudi 23 octobre 2014 09:38
To: "ipv6-ops at<mailto:ipv6-ops at>" <ipv6-ops at<mailto:ipv6-ops at>>
Subject: Google IPv6 measurements in Europe appear heading down...

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.

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.

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 from several Belgian ISP gave 10% slower over IPv6.

Any clue will be welcome

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