Re: [DNSOP] I-D Action: draft-lee-dnsop-recursion-performance-improvement-00.txt

In message <20151211173028.GA27573@nic.fr>, Stephane Bortzmeyer writes:
> On Fri, Dec 11, 2015 at 09:21:32AM -0800,
>  internet-drafts@ietf.org <internet-drafts@ietf.org> wrote 
>  a message of 42 lines which said:
> 
> >         Title           : An approach to improve recursion performance 
> >         Authors         : Xiaodong Lee
> >                           Hongtao Li
> >                           Haikuo Zhang
> >                           Peng Zuo
> > 	Filename        : draft-lee-dnsop-recursion-performance-improvement-00.
> txt
> 
> At the first reading, I do not see the difference between your RQID
> and a cookie, as documented in draft-ietf-dnsop-cookies (currently
> past working group last call and sent to the IESG).

It's half of the client half/part of a cookie.  I would also suggest
not just accepting responses without the option but rather fall back
to port randomisation.

We were planning to switch back to a fixed port.  The only question
was for the first query and retry with a random port if one didn't
get the cookie option in a reply or to only send using the fixed
port when you know that cookies are supported by the server.  The
choice of which strategy to employ is really dependent on the uptake
of cookie support in servers.

At 50%+ deployment the first strategy should give the greatest
benefit.  Before that the second strategy should be the winning
one.

Mark

> If there is a difference, and a reason why you just don't use DNS
> cookies, please document it.
> 
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Mark Andrews, ISC
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PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org