[184154] in North American Network Operators' Group

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Re: IPv6 and Android auto conf

daemon@ATHENA.MIT.EDU (Hugo Slabbert)
Mon Sep 28 11:20:41 2015

X-Original-To: nanog@nanog.org
Date: Mon, 28 Sep 2015 08:20:39 -0700
From: Hugo Slabbert <hugo@slabnet.com>
To: Anurag Bhatia <me@anuragbhatia.com>, nanog@nanog.org
In-Reply-To: <CAJ0+aXZVNAiVbz6g5zuvbey63TH3CqTTUt6+0eK=TFFdpeeCKg@mail.gmail.com>
Errors-To: nanog-bounces@nanog.org


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On Mon 2015-Sep-28 17:33:46 +0530, Anurag Bhatia <me@anuragbhatia.com> wrot=
e:

>Hello everyone
>
>
>
>
>I recently got IPv6 working at home LAN. My Android device (Google Nexus 5)
>is connected via wifi to LAN and LAN's core router is Map2N
><http://routerboard.com/RBmAP2n>. I have a /64 on the LAN with "advertise"
>enabled to make ND to work and have autoconfig working on all devices.
>There are bunch of other layer 2 devices in LAN but all just acting as
>layer 2 transparently and core L3 remains on Map2N.
>
>
>All works well for most part but only trouble I am getting is on Nexus 5
>where after around 24hrs IPv6 stops working.=20

How, specifically, does it "stop working" on the Nexus 5?
- temp addresses expired and does not generate new, valid, slaac addresses?
- RA entry ages out and doesn't get refreshed?
- cannot reach v6 gateway (ND fails somehow)?

>Only unusual thing I notice at that time is that phone 4 IPv6 as opposed=
=20
>to 2 (autoconf and temporary randomised address). Seems like some kind of=
=20
>issue in way NDP works either on Microtik or phone. The fix I am doing=20
>from few days is to restart wifi and phone interface gets fresh (two) IPv6=
=20
>addresses and all works well
>again.
>
>
>
>Anyone facing similar issue? (Note: No issues on OS X or iOS which are in
>same LAN)
>
>
>I can try DHCPv6 but I guess most of devices do not support it yet. (I see
>support for that in routerboard though).
>

Unless something's changed, DHCPv6 IA_NA isn't an option for getting an=20
IPv6 address assigned to an Android device[1][2]

>
>
>
>
>Thanks.
>
>
>--=20
>
>
>Anurag Bhatia
>anuragbhatia.com
>
>
>PGP Key Fingerprint: 3115 677D 2E94 B696 651B 870C C06D D524 245E 58E2


--=20
Hugo

hugo@slabnet.com: email, xmpp/jabber
PGP fingerprint (B178313E):
CF18 15FA 9FE4 0CD1 2319
1D77 9AB1 0FFD B178 313E

[1] https://code.google.com/p/android/issues/detail?id=3D32621
[2] http://mailman.nanog.org/pipermail/nanog/2015-June/075915.html

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