[dns-operations] Signaling client protocol to authority

[Paul Vixie]

> From: Dan Collins <en.wp.st47 at gmail.com>
> Date: Sun, 16 Jan 2011 20:10:32 -0500
> 
> Forgive me, but...exactly. Isn't that the problem? Not that a DNS
> server sends them an AAAA record that they can't use, but that they
> asked for an AAAA record that they can't use. The problem lies in the
> client that's making requests for an address using a protocol that it
> ought to know it can't use, and the problem is absolutely not that the
> server is doing exactly what the client asked it to do.
> 
> It isn't the job of a DNS server to decide what the DNS client
> actually wants.

+1.

however, and forgive me also, this isn't about dns, this is about money.
there is money being lost (or in some cases money not being made or made
fast enough or often enough) on the server and cdn side because clients are
asking for AAAA RR's they can't use.  the money is not being lost by the
clients, nor by the ISP's of the clients, nor by the vendors of the 
software used by the clients.  the money is being lost on the server side.
and so, irrespective of what the clients should have done or should do,
or what is or is not in-purview for the dns server, we're going to see a
never-ending set of proposals from server-side vendors and operators to
get this problem solved.