Re: [DNSOP] the root is not special, everybody please stop obsessing over it

Evan Hunt <> Thu, 14 February 2019 23:56 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 0D7E712F1A6 for <>; Thu, 14 Feb 2019 15:56:17 -0800 (PST)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -6.9
X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id GioNsfsHJ6bo for <>; Thu, 14 Feb 2019 15:56:16 -0800 (PST)
Received: from ( [IPv6:2001:4f8:0:2::2b]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id EFE0E128B36 for <>; Thu, 14 Feb 2019 15:56:15 -0800 (PST)
Received: from ( []) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 1FAF73AB042; Thu, 14 Feb 2019 23:56:15 +0000 (UTC)
Received: by (Postfix, from userid 10292) id EB179216C1C; Thu, 14 Feb 2019 23:56:14 +0000 (UTC)
Date: Thu, 14 Feb 2019 23:56:14 +0000
From: Evan Hunt <>
To: Paul Vixie <>
Message-ID: <>
References: <>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <>
User-Agent: Mutt/1.5.23 (2014-03-12)
Archived-At: <>
Subject: Re: [DNSOP] the root is not special, everybody please stop obsessing over it
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF DNSOP WG mailing list <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Thu, 14 Feb 2019 23:56:17 -0000

On Thu, Feb 14, 2019 at 01:57:14PM -0800, Paul Vixie wrote:
> indeed nothing which treats the root zone as special is worth pursuing, 
> since many other things besides the root zone are also needed for 
> correct operation during network partition events.

This point is well taken, but sometimes the root zone is a useful test
case for innovations that might be more generically useful later. It's
relatively small, relatively static, *XFR accessible, signed but uses
NSEC not NSEC3, etc. It's pleasantly free of annoyances.

So, zone mirroring fell out of 7706, and I suspect it will eventually have
broader applications than just local root cache. I think some of the early
work on aggressive negative caching was root-specific as well.  I wouldn't
assume an idea is bad just because it's currently focused on the root, it
might not always be.

Evan Hunt --
Internet Systems Consortium, Inc.