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Re: [v6ops] reclassify 464XLAT as standard instead of info - double stack coexistence

Alexandre Petrescu <alexandre.petrescu@gmail.com> Mon, 25 September 2017 10:07 UTC

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To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Lee Howard <lee@asgard.org>, v6ops@ietf.org
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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Mon, 25 Sep 2017 12:07:32 +0200
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Subject: Re: [v6ops] reclassify 464XLAT as standard instead of info - double stack coexistence
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Le 25/09/2017 à 11:53, Mikael Abrahamsson a écrit :
> On Mon, 25 Sep 2017, Alexandre Petrescu wrote:
> 
>> I mean GTPU protocol that uses IPv4 addresses, and carries IPv6 packets
> 
> This is not something the end user device sees or cares about.

But the end-user device connects to a network, and you claim that 
network is IPv6-only.

You claim that because there are networks that are IPv6-only then 
devices must run CLAT.

But what is "IPv6-only networks"?  Do they use IPv4 though?

> Why are 
> you bringing this up?

Because I need to understand whether the APNs dedicated to CLAT run 
IPv6-only.  Do these networks do GTP-v4?  And PDP type IPv4-IPv6?

One would like to have coherence between IPv4, IPv6, APN type, PDP type, 
encapsulations, translations.

The ideal is "double stack" - no encap, no translation, no IN A in UDPv6 
packets, no IN AAAA in UDPv4 packets, and PDP type v4v6.

Alex

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