Re: [v6ops] IPv6-Only Preferred DHCPv4 option

Lorenzo Colitti <lorenzo@google.com> Mon, 09 December 2019 15:39 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 10 Dec 2019 00:39:46 +0900
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To: Ted Lemon <mellon@fugue.com>
Cc: "Bernie Volz (volz)" <volz@cisco.com>, V6 Ops List <v6ops@ietf.org>
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Subject: Re: [v6ops] IPv6-Only Preferred DHCPv4 option
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On Tue, Dec 10, 2019 at 12:37 AM Ted Lemon <mellon@fugue.com> wrote:

> BTW, I’ve been arguing for using the parameter request list to signal this
> option, and that is how it’s supposed to be used, but I’m realizing that
> some clients may still not actually correctly implement the parameter
> request list—this was always a problem.  And so these clients may be
> relying on the behavior they get when they don’t send a PRL.   So it might
> be better for the client to send the option, rather than requesting it, and
> then the server can reply back with it if the network is IPv6-preferred.
>

Can we simply say that those clients cannot use this option, then? It seems
unfortunate to say that well-behaved clients that do know how to use the
PRL should have to add the option to their request packets outside the PRL.