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Re: [v6ops] Apple and IPv6, a few clarifications

"Heatley, Nick" <nick.heatley@ee.co.uk> Wed, 24 June 2015 07:58 UTC

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From: "Heatley, Nick" <nick.heatley@ee.co.uk>
To: David Schinazi <dschinazi@apple.com>, "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [v6ops] Apple and IPv6, a few clarifications
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Date: Wed, 24 Jun 2015 07:58:11 +0000
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Cc: Vividh Siddha <vividh@apple.com>
Subject: Re: [v6ops] Apple and IPv6, a few clarifications
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From: v6ops [mailto:v6ops-bounces@ietf.org] On Behalf Of David Schinazi
Sent: 24 June 2015 08:16
To: v6ops@ietf.org
Cc: Vividh Siddha
Subject: Re: [v6ops] Apple and IPv6, a few clarifications

Hi again,

First off, thanks everyone for the feedback and advice!
Here's an attempt at answering the questions that arose since my last post.

*) Personal hotspot on iOS
Currently the hotspot shares whatever address families it gets from the cellular network.
The current implementation broadcasts an IPv6-only network if the cellular network is of that type,
but I could imagine carriers bringing up IPv4 specifically when using this feature. Our custom version
of prefix sharing is described in more detail here:
https://opensource.apple.com/source/xnu/xnu-2782.1.97/bsd/netinet6/nd6_prproxy.c
It supports creating multiple hotspots at the same time, such as Wi-FI and Bluetooth and bridges them.

[Heatley, Nick] Thanks for sharing the information, David.
When you say you imagine carries bringing up IPv4 specifically for personal hotspot, not sure what you mean - do you mean a parallel, dedicated "hotspot APN"?
Many carriers across the globe, for their own individual business reasons, have a common APN approach for the mass consumer market, but nevertheless desire this common APN to go IPv6-only.

So I am nervous about how to support *any* device on a personal hotspot from an IPv6-only iOS handset in this way, do you have any more details on your intentions here?
Thanks for the discussion. Nick







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