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Re: [v6ops] I-D Action: draft-ietf-v6ops-nat64-experience-04.txt

Mikael Abrahamsson <swmike@swm.pp.se> Thu, 14 November 2013 06:58 UTC

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Date: Thu, 14 Nov 2013 07:58:38 +0100
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: holger.metschulat@telekom.de
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Cc: v6ops@ietf.org
Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-nat64-experience-04.txt
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On Thu, 14 Nov 2013, holger.metschulat@telekom.de wrote:

> this needs to be resolved in the provider's network by applying DNS64 
> only to those UE that have an IPv6-only connection. Usually, IPv6-only 
> connectivity means a separate APN with a dedicated IPv6 pool, so either 
> IPv4 and IPv4v6 UE get a different DNS server than the IPv6-only UE, or 
> the DNS server is the same and it can deduce from the client's IPv6 
> address whether it's an IPv4v6 or and IPv6-only client.

I oppose this reasoning. It brings in unneeded complexity in the mobile 
core network to handle all this logic, and besides, customers should be 
able to choose if they want IPv4v6 or IPv6 only, meaning you don't know in 
advance.

It's beneficial if standards allow for less complexity in backend systems. 
Complex backend systems is less problem for huge ISPs, but it is for 
smaller ones. Also, even huge ISPs benefit from less complexity in their 
backend systems.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se

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