From: Paul Hoffman <paul.hoff...@vpnc.org>
Subject: Re: [DNSOP] draft-ietf-dnsop-root-loopback-01
Date: Wed, 25 Mar 2015 14:18:59 -0500

> On Mar 25, 2015, at 11:06 AM, Evan Hunt <e...@isc.org> wrote:
>> 
>> On Wed, Mar 25, 2015 at 03:53:27PM +0000, Tony Finch wrote:
>>> I think you mean "common queries over UDP" since AXFR over TCP isn't a
>>> thing :-)
>> 
>> Or rather AXFR over UDP isn't. TCP is mandatory for *XFR.
> 
> Where is that requirement made? The only thing I see in RFC 5936 is that AXFR 
> over UDP is not defined.

Section 4.3.5 of RFC1034 says: "Because accuracy is essential, TCP or
some other reliable protocol must be used for AXFR requests."

-- Akira Kato

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