push apps failing in Android until you disable IPv6

[Lorenzo Colitti]

Jordi,

from your report it's not clear what the problem is. You say that the
problem disappears when IPv6 is disabled on the router, but then you say
that it also happens on an IPv4-only network. How can those statements both
be true?

It's not usually possible to disable IPv6 on an Android device unless the
device is rooted, which usually involves installing a non-stock build which
may behave differently.

Also, please clarify what device you're talking about. Stock Android should
not have this problem, but some OEMs are known to drop IPv6 packets when
the screen is off.

Cheers,
Lorenzo

On Sat, Apr 30, 2016 at 9:03 PM, JORDI PALET MARTINEZ <
jordi.palet at consulintel.es> wrote:

> Hi,
>
> I’m not an Android user, but while doing and IPv6 training, many folks in
> the meeting room told me that they needed to disable IPv6 in the
> router/Android devices, otherwise they aren’t getting the notifications
> from WhatsApp, Facebook, and many other apps.
>
> We have tried disabling energy saving options in Android, and it seems the
> problems is not there. Basically, if the Android device is in stand-by,
> notifications don’t come, until you “open” the Android. Apple and Windows
> devices don’t have this problem.
>
> The scenario seems to happen regardless of the type of CPE (some observed
> this with ADSL, others with GPON).
>
> Just for having a “stable scenario” were to try, we have actually
> replicated this problem with Android 4.4 and 5.1, with an ONT Huawei
> HG8245H, hw v 494.B and firmware v V3R013C00S106.
>
> We have tried using both the ONT as the wireless AP and also disabling the
> WiFi on the ONT and using an external AP. Same problem in both situations.
>
> Don’t look like an issue related to a specific ISP, because the situation
> happens in many different ISPs, and of course none of them provides IPv6 :-(
>
> I’m specially worried because the ISPs are telling the users to disable
> IPv6 everywhere …
>
> Any hints ?
>
> Regards,
> Jordi
>
>
>
>
>
>
>
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