Slow WiFi with Android Marshmallow & IPv6?

[Eric Vyncke (evyncke)]

Jeroen, Erik and John,

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.

-éric

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 "Brzozowski, John Jason" <jjmb at jjmb.com<mailto:jjmb at jjmb.com>>
Date: Sunday 24 April 2016 at 16:01
To: Erik Kline <ek at google.com<mailto:ek at google.com>>
Cc: Jeroen Massar <jeroen at massar.ch<mailto:jeroen at massar.ch>>, IPv6 Ops list <ipv6-ops at lists.cluenet.de<mailto:ipv6-ops at lists.cluenet.de>>
Subject: Re: Slow WiFi with Android Marshmallow & IPv6?

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.

On Sunday, April 24, 2016, Erik Kline <ek at google.com<mailto:ek at google.com>> wrote:
On 24 April 2016 at 19:53, Jeroen Massar <jeroen at massar.ch<javascript:;>> wrote:
> On 2016-04-24 11:51, Eric Vyncke (evyncke) wrote:
>> One of the first Belgian ISP to deploy IPv6 (VOO) is now recommending to
>> its Android Marshmallow (6.0.1) users to deactivate IPv6 on their
>> residential WiFi CPE... :-(
>>
>> It appears that the issue is about IPv6 web sites/apps being really
>> slower when using IPv6.
>
> Is it a DNS issue maybe?
>
> https://www.sixxs.net/faq/dns/?faq=ipv6slowconnect
>
> As that has been the general cause of "Disable IPv6!!!!!" around the
> world for many years already.
>
> Of course, without more details, little one really can say. Bug number
> maybe?
>
> Greets,
>  Jeroen
>

Yeah, a link to something that eventually leads to a bug report would be good.

Also if anybody has adb installed they can just try "adb shell dumpsys
connectivity --diag" and see what the over-simplified diagnostic
output shows.
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