Re: [v6ops] Apple and IPv6, a few clarifications - ND proxy for bridging hotspots

Alexandru Petrescu <alexandru.petrescu@gmail.com> Thu, 25 June 2015 09:14 UTC

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Date: Thu, 25 Jun 2015 11:13:59 +0200
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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To: Mark Andrews <marka@isc.org>, Gert Doering <gert@space.net>
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Subject: Re: [v6ops] Apple and IPv6, a few clarifications - ND proxy for bridging hotspots
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Le 25/06/2015 01:41, Mark Andrews a écrit :
>
> In message <20150624161858.GP67883@Space.Net>et>, Gert Doering writes:
>> Hi,
>>
>> On Wed, Jun 24, 2015 at 05:26:39PM +0200, Alexandru Petrescu wrote:
>>>> Crap.  The devices on either sides will not see which method the
>> device
>>>> in the middle deploys to achieve reachability.
>>>
>>> Crap?  The smartphone doing ND proxy is useless if the car's router is
>>> not doing the same.  And currently car routers dont do ND proxy.
>>
>> Crap.
>>
>>>        ----------                ---------                         ------
>>> 4G--|smartphone|-----BT-------|CarRouter|------hotspotWiFi------|tablet|
>>>        ----------                ---------                         ------
>>
>> So?  What "smartphone" does is of no interest to "CarRouter".  It
>>
>>   ** WILL **
>>   ** NOT **
>>   ** SEE **
>>
>> which method "smartphone" deploys to achieve reachability.
>
> If the smart phones in doing ND proxy then there is no PD therefore
> the hotspotWiFi won't have a GUA prefix.
>
> This we will kludge cellphones instead of just doing it right in
> the first place is coming back to bite us.

I agree.

We have already seen this with cable boxes at home: the first IPv6 cable 
boxes ten years ago were also doing ND proxy.  Not any longer - the 
now-classic home boxes have several /64s to deliver how they like to the 
home's subnets.

Alex

>
>> Gert Doering
>>          -- NetMaster
>> --=20
>> have you enabled IPv6 on something today...?
>>
>> SpaceNet AG                        Vorstand: Sebastian v. Bomhard
>> Joseph-Dollinger-Bogen 14          Aufsichtsratsvors.: A. Grundner-Culemann
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