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Re: Last Call: <draft-ietf-sunset4-ipv6-ietf-01.txt> (IETF: End Work on IPv4) to Proposed Standard

Stewart Bryant <stewart.bryant@gmail.com> Mon, 02 October 2017 08:23 UTC

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Subject: Re: Last Call: <draft-ietf-sunset4-ipv6-ietf-01.txt> (IETF: End Work on IPv4) to Proposed Standard
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>, Denis Ovsienko <denis@ovsienko.info>
Cc: ietf@ietf.org
References: <150660518277.13796.5801483741214576151.idtracker@ietfa.amsl.com> <15ecdbe2816.f5ac2a2c78696.145459607793828122@ovsienko.info> <CAKKJt-eFGEuFkX25oM0r45cemdWL9M2hWE2qJhPmqFSs1XT0LQ@mail.gmail.com> <68d72410-461c-7496-7c33-c5c786fd35a9@cs.tcd.ie>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Mon, 02 Oct 2017 09:23:37 +0100
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On 02/10/2017 08:54, Stephen Farrell wrote:
> I do however
> agree that we ought stop adding features to IPv4 that don't work for
> IPv6,

Something that has been nagging me for a while is that the underpin of 
this statement,
is the assumption that IPv4 and IPv6 are equivalent and work the same 
way. However,
they do not work the same way. For example, IPv4 uses ARP and permits 
in-network
fragmentation. So statements such as the above would mean that 
legitimate maintenance
might be precluded.

Rather than tie millstones to IPv4, wouldn't it be better to demonstrate 
the compelling
advantage of IPv6?

- Stewart

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