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Re: New Version Notification for draft-hinden-ipv4flag-00.txt

james woodyatt <jhw@google.com> Fri, 17 November 2017 18:39 UTC

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Subject: Re: New Version Notification for draft-hinden-ipv4flag-00.txt
From: james woodyatt <jhw@google.com>
In-Reply-To: <0F60023D-9EDA-4C5D-9ABB-27BEAD294780@gmail.com>
Date: Fri, 17 Nov 2017 10:39:06 -0800
Cc: Fernando Gont <fernando@gont.com.ar>, IPv6 List <ipv6@ietf.org>
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To: Bob Hinden <bob.hinden@gmail.com>
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On Nov 17, 2017, at 00:17, Bob Hinden <bob.hinden@gmail.com> wrote:
> 
> The flag is to tell the host to not use IPv4.  Once the host see the Flag=1, it should stop sending IPv4.

The draft is very confused about what the flag means. And both of the conflicting descriptions in the draft are in conflict with this statement. Here are the three conflicting positions (I’m wondering how many will emerge before this can be sent back to the April 1 queue).

  — "IPv4 is Not Available on this Router"

  — "A host that receives only RAs with the flag set to 1 should not attempt IPv4 operations, unless it subsequently receives at least one RA with the flag set to zero."

  — "A host that receives Flag=1 should stop sending IPv4" (to what routers? on which interfaces? until what condition arises?).

Please send this draft back into the For Comedy Purposes Only category and leave the serious business of this topic to the SUNSET4 working group, which is actually chartered to deal with it.


--james woodyatt <jhw@google.com>

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