push apps failing in Android until you disable IPv6

[Brian E Carpenter]

On 14/05/2016 04:02, Lorenzo Colitti wrote:
> On Fri, May 13, 2016 at 3:27 PM, Mikael Abrahamsson <swmike at swm.pp.se>
> wrote:
> 
>> My guess is that any device which sees this, will install default IPv6
>> route but will only have link local addresses on the interface, thus there
>> is no source address to use to send packets to the world outside the link.
>>
> 
> You're forgetting that the device might have an an IPv6 address on the
> cellular interface, and an OS that uses the weak host model like Linux is
> perfectly happy to use the cellular interface's IPv6 address to send
> packets on the wifi interface.

Ouch. Yes, that's what we are incidentally trying to fix with
https://tools.ietf.org/html/draft-ietf-6man-multi-homed-host
but it will be a while before that becomes widespread.

   Brian