Re: [DNSOP] Fwd: New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt

Dick Franks <> Fri, 23 March 2018 23:06 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 5EFB212E037 for <>; Fri, 23 Mar 2018 16:06:50 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (2048-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id riOS0WW2ITvh for <>; Fri, 23 Mar 2018 16:06:49 -0700 (PDT)
Received: from ( [IPv6:2a00:1450:400c:c0c::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id AC14B126DEE for <>; Fri, 23 Mar 2018 16:06:48 -0700 (PDT)
Received: by with SMTP id z73so13618690wrb.0 for <>; Fri, 23 Mar 2018 16:06:48 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=NCLCrYFqszi5Yzl4r1Yfkrnd3atnp8D7ow4RxB0U4Po=; b=FKjH77EWNRvcqzoxGMd6n9aSGFLDdOn8a9ueaagZ4zT6/ArIMV1Vc9G7ZFGrWjvgu6 7h4fVJ71Rb4CM+Kw1/B8j8nxEt3jl9ZRRq/eK1ng6vAusLTcD+hjUDwdWx3zP/mGeVoO GWTlF5XkuhoprGws80o0iSPmfYTP9vZnq8Z+lepJIMEBfieIXerZLURzbj0HNRIF/3rF 8I5G5sQI8I/bSJq39UGch2Ssz9BQFh0CskY6gR6JTh81o4WyqTkQx5aQfpSZE4rhBxTx SAk7io29n63pigb9/lrfd28cktF3IA39ia0Wvg/6mdQBaJXmjmzQa4HGwVrlXwMfER+4 fprA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=NCLCrYFqszi5Yzl4r1Yfkrnd3atnp8D7ow4RxB0U4Po=; b=pLFO6MNRRuxDrtDqipVd/F0bMxG4ooh/q6yI83IKhyL/LHs7vM7oiJljtStERKxCln lVhW2ESKuBuImH66trrqPDobwQs+qemQ1KCCXIeoE8Jwh5aTk5gDtuiCc+2q00/twK+k 4/gcHM6MvLfRBERn8kfUUg3LRke33BK7Lzyj1M+p8VkhWqBQSH3B5MqfS4h6Re5sxqh7 rsCFVxj6anEz5UJ3W/qsP4Dmxr8dTTV6IyJf7DQB1jttT3EZyIPLb+gqGVaELTejOkM6 fGI5zDBvUk/MT0LJoDpvJqfI6NKeh6Ve5S8Zfuc8Yrli96R5zhJuaouZo+6oyDoW6Sm8 Q5PQ==
X-Gm-Message-State: AElRT7HXsMRrZoOFMp+U6toWAuJp8QBqPTxOtxF0symMmX/txTC1RNUU +vrCBRE4komhZSPfMidHz0HT3sAy65hz2NtBSGdwyQ==
X-Google-Smtp-Source: AG47ELsc671L2T8MPDH6rgNUAWqu4mfvfQ4Cvz2vLQqLRL1azvp8kI07h5RhPdJJrnVoNNzPlm+e9u28rX7nLP+xKxE=
X-Received: by with SMTP id c50mr24573723wra.196.1521846407271; Fri, 23 Mar 2018 16:06:47 -0700 (PDT)
MIME-Version: 1.0
Received: by with HTTP; Fri, 23 Mar 2018 16:06:06 -0700 (PDT)
In-Reply-To: <>
References: <> <>
From: Dick Franks <>
Date: Fri, 23 Mar 2018 23:06:06 +0000
Message-ID: <>
To: =?UTF-8?B?T25kxZllaiBTdXLDvQ==?= <>
Cc: dnsop <>
Content-Type: multipart/alternative; boundary="001a11468ffa82235805681c7a32"
Archived-At: <>
Subject: Re: [DNSOP] Fwd: New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: IETF DNSOP WG mailing list <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Fri, 23 Mar 2018 23:06:50 -0000

On 23 March 2018 at 12:11, Ondřej Surý <> wrote:

> this is a first attempt to start reducing the load on DNS Implementors and
> actually remove the stuff from DNS that’s not used and not needed anymore.

I have no quarrel with the overall effect of this proposal, but the
justifications are necessarily different for each category identified in

          3.3.4. MD RDATA format (Obsolete)
          3.3.5. MF RDATA format (Obsolete)

These were already obsolete when RFC1035 was published and arguably should
never have appeared at all.
If these have not already been deprecated somewhere else, there is no
plausible argument against doing so now.

          3.3.3. MB RDATA format (EXPERIMENTAL)
          3.3.6. MG RDATA format (EXPERIMENTAL)
          3.3.7. MINFO RDATA format (EXPERIMENTAL)
          3.3.8. MR RDATA format (EXPERIMENTAL)

After 30 years, it seem clear that the "experiment" produced little or
nothing of lasting value.  Plenty of word have been wasted in the past
about open-ended experiments and unpublished results.  Deprecating these
RRTYPES would put a formal end to the "experiment".  Any counter-argument
needs to be justified by evidence of continuing use in the global internet,
and made by the parties directly affected.  The "someone might be using it
somewhere ..." argument is far from convincing.

          3.4.2. WKS RDATA format

WKS is IPv4-specific, so the choice is ether to wait until IPv4 itself
becomes deprecated, or to dispose of it now in the same manner as MB, MG

          3.2.3. QTYPE values

The intended meaning of MAILA is uncertain, but it is already declared by
RFC1035 to be obsolete.

MAILB is a specific request for MB, MG, and MR records.

Both should also be deprecated by this document.


> DNSOP mailing list