At least on some Samsung devices there is this known issue where they drop IPv6 packets when screen-saved. This is fixed n the Galaxy S7 apparently (I haven't tested myself). I agree this is a major problem...
http://developer.samsung.com/forum/board/thread/view.do?boardName=General&messageId=239890 http://www.gossamer-threads.com/lists/nsp/ipv6/54641 On Sat, Apr 30, 2016 at 8:03 AM, JORDI PALET MARTINEZ < [email protected]> 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 > > > > > > >
