<div dir="ltr">Android is properly trying to query DNS over IPv6 unlike other devices/OSes. Most other mobile platforms still prefer the querying of DNS over IPv4 for A/AAAA RR query types.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Apr 24, 2016 at 10:17 AM, Eric Vyncke (evyncke) <span dir="ltr"><<a href="mailto:evyncke@cisco.com" target="_blank">evyncke@cisco.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>Jeroen, Erik and John,</div>
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<div>Thanks for the hint. I will advise the ISP to investigate any DNS issue (such as not returning an error message when requesting a non-existing AAAA) but I wonder why it is linked to that specific Android Marshmallow version.</div>
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<div>-éric</div>
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<span style="font-weight:bold">From: </span><<a href="mailto:ipv6-ops-bounces+evyncke=cisco.com@lists.cluenet.de" target="_blank">ipv6-ops-bounces+evyncke=cisco.com@lists.cluenet.de</a>> on behalf of "Brzozowski, John Jason" <<a href="mailto:jjmb@jjmb.com" target="_blank">jjmb@jjmb.com</a>><br>
<span style="font-weight:bold">Date: </span>Sunday 24 April 2016 at 16:01<br>
<span style="font-weight:bold">To: </span>Erik Kline <<a href="mailto:ek@google.com" target="_blank">ek@google.com</a>><br>
<span style="font-weight:bold">Cc: </span>Jeroen Massar <<a href="mailto:jeroen@massar.ch" target="_blank">jeroen@massar.ch</a>>, IPv6 Ops list <<a href="mailto:ipv6-ops@lists.cluenet.de" target="_blank">ipv6-ops@lists.cluenet.de</a>><br>
<span style="font-weight:bold">Subject: </span>Re: Slow WiFi with Android Marshmallow & IPv6?<br>
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<div>My customers saw this issue at one point. We had issues with DNS over IPv6. Bad DNS and/or network configurations. Once these were fixed, the problems cleared up.<br>
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On Sunday, April 24, 2016, Erik Kline <<a href="mailto:ek@google.com" target="_blank">ek@google.com</a>> wrote:<br>
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On 24 April 2016 at 19:53, Jeroen Massar <<a>jeroen@massar.ch</a>> wrote:<br>
> On 2016-04-24 11:51, Eric Vyncke (evyncke) wrote:<br>
>> One of the first Belgian ISP to deploy IPv6 (VOO) is now recommending to<br>
>> its Android Marshmallow (6.0.1) users to deactivate IPv6 on their<br>
>> residential WiFi CPE... :-(<br>
>><br>
>> It appears that the issue is about IPv6 web sites/apps being really<br>
>> slower when using IPv6.<br>
><br>
> Is it a DNS issue maybe?<br>
><br>
> <a href="https://www.sixxs.net/faq/dns/?faq=ipv6slowconnect" target="_blank">https://www.sixxs.net/faq/dns/?faq=ipv6slowconnect</a><br>
><br>
> As that has been the general cause of "Disable IPv6!!!!!" around the<br>
> world for many years already.<br>
><br>
> Of course, without more details, little one really can say. Bug number<br>
> maybe?<br>
><br>
> Greets,<br>
> Jeroen<br>
><br>
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Yeah, a link to something that eventually leads to a bug report would be good.<br>
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Also if anybody has adb installed they can just try "adb shell dumpsys<br>
connectivity --diag" and see what the over-simplified diagnostic<br>
output shows.<br>
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