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Re: [DNSOP] [dnsext] Re: Computerworld apparently has changed DNS protocol

Florian Weimer <fw@deneb.enyo.de> Wed, 04 November 2009 20:54 UTC

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From: Florian Weimer <fw@deneb.enyo.de>
To: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
References: <200911041858.TAA24009@TR-Sys.de> <FD44BF39-5B62-4689-AC6D-8DFFAF340EA1@icsi.berkeley.edu> <20091104192634.GA31981@vacation.karoshi.com.> <d791b8790911041141k71066fa9nede54d5dff9394fa@mail.gmail.com> <AF9E632C-C470-4EA8-9BB4-BF144D208619@ICSI.Berkeley.EDU>
Date: Wed, 04 Nov 2009 21:54:30 +0100
In-Reply-To: <AF9E632C-C470-4EA8-9BB4-BF144D208619@ICSI.Berkeley.EDU> (Nicholas Weaver's message of "Wed, 4 Nov 2009 11:43:11 -0800")
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Cc: Matthew Dempsky <matthew@dempsky.org>, HÎnes <ah@tr-sys.de>, dnsop@ietf.org, namedroppers@ops.ietf.org, Alfred, bmanning@vacation.karoshi.com
Subject: Re: [DNSOP] [dnsext] Re: Computerworld apparently has changed DNS protocol
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* Nicholas Weaver:

> Also, has someone done a study what the major recursive resolvers do
> on response failures from a root?  Do they go to another first or do
> they try a smaller EDNS MTU?

Note that switching seems beneficial because six roots MTUs clearly
support MTUs less than 1500, and seven roots probably don't (from my
POV, numbers about a week old).

It will be interesting to see if the root ops fix this before or after
they've enabled large responses for DO=1. 8-/

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