Re: IPv4 traffic on "ietf-v6ONLY"

Brian E Carpenter <brian.e.carpenter@gmail.com> Wed, 15 November 2017 11:33 UTC

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Subject: Re: IPv4 traffic on "ietf-v6ONLY"
To: ipv6@ietf.org
References: <f9805855-68cf-a3e8-a13f-c6ac31b09058@gmail.com> <bbd4e1d2-047f-6758-76f8-fd591c51dad7@gmail.com> <D631CE54.8C0F5%lee@asgard.org> <m1eEvEP-0000G3C@stereo.hq.phicoh.net> <5655992F-737A-4223-A917-63CAD6DF7A1D@cisco.com> <m1eEvku-0000F7C@stereo.hq.phicoh.net>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <232a0572-a804-fccf-7278-e70671a50df9@gmail.com>
Date: Thu, 16 Nov 2017 00:32:58 +1300
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On 16/11/2017 00:21, Philip Homburg wrote:
>>     Perhaps, define a DHCPv6 option to convey v6-only, for which
>>     the client interpretation should be to suppress v4.  Although
>>    this will be at the cross road with allowing client's wishes to
>>    use v4 LL for whatever useless/useful traffic, it would be a
>>    reasonable deployment policy to enforce.
> 
> The problem with a DHCPv6 option is that an IPv4-only network may not be
> prepared to defend against rogue DHCPv6 servers.

A bigger problem is that not all networks/hosts support DHCPv6. It needs
to be an RA option if you want everybody to see it.

    Brian