Subj : 
To   : Richard Menedetter
From : Michiel van der Vlist
Date : Tue Jul 16 2019 00:50:29

Hello Richard,

On Monday July 15 2019 23:06, you wrote to me:

 RM>>> https://ipv6.menedetter.net/

 MV>> For the IPv4 test, IPvFox says I am connected via IPv4 but the
 MV>> button still says "Connected via IPv6". I know why that is, I ran
 MV>> into that problem before.;-)

 RM> Why?

This part:

<center>
<a href='https://ipv6-test.com'><img src='https://v4v6.ipv6-test.com/imgtest.png' alt='ipv6 test' title='ipv6 test' border='0' /></a>
<p>
<!--<a href='https://www.worldipv6launch.org/'><img src='ipv6.png' alt='ipv6' title='ipv6' border='0' /></a>-->
</center>

Even when I use ipv4.menedetter.net and so have my system connect to your's by IPv4, the above code is executed on MY system and it calls ipv6-test.com over IPv6 because my system supports IPv6. And so ipv6-test.com reports that I connect by IPv6.

The button reports how I connect to ipv6-test.com, not how I connect to YOU.

 RM>>> The speedtest is not extremely accurate, but IMO it is good
 RM>>> enough to get an estimate.

 MV>> My provider says I have 50/5

 RM> For IPv4 it sounds good.
 RM> Question is why is IPv6 so much slower.

I don't know. But it is not incidental. The speed varies a bit but the difference between IPv4 and IPv6 is consistent. IPv6 speed is about half of IPv4.

 RM> And if the problem is on my side or yours or both ;)

Other dual stack speed tests perforned from here show no consistent sigificant difference between IPv4 and IPv6...


Cheers, Michiel

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