Re: problem statement [was Re: New Version Notification for draft-hinden-ipv4flag-00.txt]

Erik Kline <ek@google.com> Tue, 21 November 2017 22:40 UTC

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From: Erik Kline <ek@google.com>
Date: Tue, 21 Nov 2017 22:40:20 +0000
Message-ID: <CAAedzxo726yiHE0i2hHBHXK7TQdo-OPeJNKms3cnuzwgUy8NTA@mail.gmail.com>
Subject: Re: problem statement [was Re: New Version Notification for draft-hinden-ipv4flag-00.txt]
To: Michael Richardson <mcr+ietf@sandelman.ca>
Cc: IETF IPv6 Mailing List <ipv6@ietf.org>
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> Having SAID all of that, I still believe that an RA option (not flag bit)
> that declared on behalf of the router, "I do not speak IPv4" might be worth
> standardizing.  Perhaps, we should rather name the option, "I speak only IPv6"
> since many of the devices also do not not speak XNS or AppleTalk.

I agree it should denote "I'm IPv6-only".  But I don't think we need
to take a full 8 bytes (minimum ND option size) to say this.