Re: [netmod] Adam Roach's No Objection on draft-ietf-netmod-entity-07: (with COMMENT)

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Thu, 11 January 2018 09:13 UTC

Return-Path: <j.schoenwaelder@jacobs-university.de>
X-Original-To: netmod@ietfa.amsl.com
Delivered-To: netmod@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 92DAF12EABB; Thu, 11 Jan 2018 01:13:04 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.909
X-Spam-Level:
X-Spam-Status: No, score=-1.909 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, T_RP_MATCHES_RCVD=-0.01, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ypy8vksNLSVQ; Thu, 11 Jan 2018 01:13:01 -0800 (PST)
Received: from atlas5.jacobs-university.de (atlas5.jacobs-university.de [212.201.44.20]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 67181124239; Thu, 11 Jan 2018 01:13:01 -0800 (PST)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222]) by atlas5.jacobs-university.de (Postfix) with ESMTP id 3922769A; Thu, 11 Jan 2018 10:13:00 +0100 (CET)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from atlas5.jacobs-university.de ([10.70.0.217]) by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new, port 10032) with ESMTP id jYFzxs441-bI; Thu, 11 Jan 2018 10:12:59 +0100 (CET)
Received: from hermes.jacobs-university.de (hermes.jacobs-university.de [212.201.44.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hermes.jacobs-university.de", Issuer "Jacobs University CA - G01" (verified OK)) by atlas5.jacobs-university.de (Postfix) with ESMTPS; Thu, 11 Jan 2018 10:13:00 +0100 (CET)
Received: from localhost (demetrius1.jacobs-university.de [212.201.44.46]) by hermes.jacobs-university.de (Postfix) with ESMTP id 2202C2013D; Thu, 11 Jan 2018 10:13:00 +0100 (CET)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from hermes.jacobs-university.de ([212.201.44.23]) by localhost (demetrius1.jacobs-university.de [212.201.44.32]) (amavisd-new, port 10024) with ESMTP id 9jBzZHFwk-RN; Thu, 11 Jan 2018 10:12:59 +0100 (CET)
Received: from elstar.local (unknown [10.50.231.133]) by hermes.jacobs-university.de (Postfix) with ESMTP id A7EF32013C; Thu, 11 Jan 2018 10:12:59 +0100 (CET)
Received: by elstar.local (Postfix, from userid 501) id 94BF1420B8BD; Thu, 11 Jan 2018 10:12:59 +0100 (CET)
Date: Thu, 11 Jan 2018 10:12:59 +0100
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: Martin Bjorklund <mbj@tail-f.com>
Cc: adam@nostrum.com, iesg@ietf.org, netmod-chairs@ietf.org, draft-ietf-netmod-entity@ietf.org, netmod@ietf.org
Message-ID: <20180111091259.72vv7vs35jlqm4so@elstar.local>
Reply-To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
Mail-Followup-To: Martin Bjorklund <mbj@tail-f.com>, adam@nostrum.com, iesg@ietf.org, netmod-chairs@ietf.org, draft-ietf-netmod-entity@ietf.org, netmod@ietf.org
References: <151565374680.30635.814396227713285360.idtracker@ietfa.amsl.com> <20180111071317.wvqyyufx4bkyz5pi@elstar.local> <20180111.094924.121178859287289476.mbj@tail-f.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <20180111.094924.121178859287289476.mbj@tail-f.com>
User-Agent: NeoMutt/20171215
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/RTmy0_eo-nCRU_yzSUQlml7YAdg>
Subject: Re: [netmod] Adam Roach's No Objection on draft-ietf-netmod-entity-07: (with COMMENT)
X-BeenThere: netmod@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: NETMOD WG list <netmod.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netmod>, <mailto:netmod-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netmod/>
List-Post: <mailto:netmod@ietf.org>
List-Help: <mailto:netmod-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netmod>, <mailto:netmod-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 11 Jan 2018 09:13:05 -0000

On Thu, Jan 11, 2018 at 09:49:24AM +0100, Martin Bjorklund wrote:

> Will do.  As it happens, I always just look into the MIBs distributed
> by libsmi, and it seems the MIB is not updated there ;-)

OK. My fault.

> Which leads
> to an interesting issue - the errata for the MIB not only changes the
> description in the comment, but it also changes the *value*.  I will
> thus do the same in the YANG module:
> 
>       enum peta {
>         value 14;
>         description
>           "Data scaling factor of 10^15.";
>       }
>       enum exa {
>         value 15;
>         description
>           "Data scaling factor of 10^18.";
>       }
> 
> This matches the verified MIB Errata, but since the original MIB is
> probably present in most distributions, I wouldn't be surprised if
> this object is not correctly implemented in real code...  When I
> googled for the MIB I found several instances of NON-updated MIBs, and
> zero instances of an updated MIB.

Yes. This is very subtle. Not changing the value would also have been
somewhat odd since tera and exa are then 'out of natural order'. But
it might have been more robust. Anyway, the errata says what it says
and all we can do now is likely to hope that people running into this
at the end find the errata linked to the RFC. Hence, I will commit the
errata fix to the libsmi repository now.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>