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Re: [DNSOP] Last Call: <draft-ietf-dnsop-no-response-issue-14.txt> (A Common Operational Problem in DNS Servers - Failure To Communicate.) to Best Current Practice

Stephane Bortzmeyer <bortzmeyer@nic.fr> Mon, 16 December 2019 09:42 UTC

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Date: Mon, 16 Dec 2019 10:39:45 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: dnsop@ietf.org
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Subject: Re: [DNSOP] Last Call: <draft-ietf-dnsop-no-response-issue-14.txt> (A Common Operational Problem in DNS Servers - Failure To Communicate.) to Best Current Practice
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On Thu, Dec 05, 2019 at 06:00:39PM -0800,
 The IESG <iesg-secretary@ietf.org> wrote 
 a message of 53 lines which said:

> The IESG has received a request from the Domain Name System Operations WG
> (dnsop) to consider the following document: - 'A Common Operational Problem
> in DNS Servers - Failure To Communicate.'
>   <draft-ietf-dnsop-no-response-issue-14.txt> as Best Current Practice

I just tested the dig commands against NSD and Knot. No problem for
NSD but Knot has a discrepancy:

8.1.4 "Testing Unknown Opcodes"

expect: status: NOTIMP

But:

% dig +noedns +noad +opcode=15 +norec +header-only @2001:678:f::1  

; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> +noedns +noad +opcode=15 +norec +header-only @2001:678:f::1
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: RESERVED15, status: FORMERR, id: 58770
;; flags: qr; QUERY: 0, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; Query time: 24 msec
;; SERVER: 2001:678:f::1#53(2001:678:f::1)
;; WHEN: Mon Dec 16 10:28:49 CET 2019
;; MSG SIZE  rcvd: 12

Do we agree that Knot is wrong and the draft is right? Or is FORMERR
acceptable?

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