IETF Logo Mail Archive

Re: [netmod] An abundant amount of IANA if types...

Ladislav Lhotka <lhotka@nic.cz> Fri, 06 April 2018 07:55 UTC

Return-Path: <lhotka@nic.cz>
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 A0ACA128961 for <netmod@ietfa.amsl.com>; Fri, 6 Apr 2018 00:55:20 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -7.01
X-Spam-Level:
X-Spam-Status: No, score=-7.01 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, T_RP_MATCHES_RCVD=-0.01] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz
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 NqzGgZGFJiPz for <netmod@ietfa.amsl.com>; Fri, 6 Apr 2018 00:55:18 -0700 (PDT)
Received: from mail.nic.cz (mail.nic.cz [IPv6:2001:1488:800:400::400]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E650912426E for <netmod@ietf.org>; Fri, 6 Apr 2018 00:55:17 -0700 (PDT)
Received: from birdie (unknown [IPv6:2001:718:1a02:1::380]) by mail.nic.cz (Postfix) with ESMTPSA id 7C32362546; Fri, 6 Apr 2018 09:55:14 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1523001314; bh=gHOS5UAF8ChFwWlZimRXiqYK4KoFIgJJhKGwYlQXsBg=; h=From:To:Date; b=fRUNIkLCXIdqYx6oYLFifo2LhLh3W8nRP6jGObsV909EjsS392kYaupgg+ZyINNW7 HLz11+AzIer4GQvDC2EAT/IaR8msGwZ52XqyuJ+Wyk9Nksb5GMf7aRI8/hjk6xLFX2 kGMjl2Z3Y5pUrcjjk0w0Livq3i4vf0ANkCzECKpA=
Message-ID: <95e15ae380a2e114a8defa3ad924d73c15137b1b.camel@nic.cz>
From: Ladislav Lhotka <lhotka@nic.cz>
To: Alex Campbell <Alex.Campbell@Aviatnet.com>, "Bogaert, Bart (Nokia - BE/Antwerp)" <bart.bogaert@nokia.com>, "netmod@ietf.org" <netmod@ietf.org>
Date: Fri, 06 Apr 2018 09:55:14 +0200
In-Reply-To: <1522972773708.26374@Aviatnet.com>
References: <AM4PR07MB1716AECAC144285D98B0E1EE94BB0@AM4PR07MB1716.eurprd07.prod.outlook.com> <1522972773708.26374@Aviatnet.com>
Organization: CZ.NIC
Content-Type: text/plain; charset="UTF-8"
X-Mailer: Evolution 3.28.1
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: clamav-milter 0.99.2 at mail
X-Virus-Status: Clean
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/pCoboCPNLhoem7IY2RAxyHgvVAs>
Subject: Re: [netmod] An abundant amount of IANA if types...
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: Fri, 06 Apr 2018 07:55:21 -0000

Hi,

I have argued several times in the past that the IANA interface list (and, for
that matter, the iana-if-type module) is a useless pile of rubbish because

- for some interface classes (Ethernet, tunnels) it is way too coarse-grained

- on the other hand, it contains a lot of stuff that nobody will ever use

- using the cabalistic (and wrong, in fact) name "ethernetCsmacd" for Ethernet
is outright stupid

- YANG identities allow for encoding important relationships in interface types,in the flat list all this information is lost 

- as you say, implementing the iana-if-type module means that all interface
types listed therein become valid.

So yes, I do believe that it would be useful if authoritative expert groups
develop a better structure of interface type identities.

Lada
  
On Thu, 2018-04-05 at 23:59 +0000, Alex Campbell wrote:
> I haven't seen any previous discussions on the topic, but we have a similar
> problem.
> Note this is not really to do with YANG itself, so much as the practical
> limitations of the software package that provides our CLI interface.
> In NETCONF, the existence of extra unused identities doesn't pose any problem.
> 
> From: netmod <netmod-bounces@ietf.org> on behalf of Bogaert, Bart (Nokia -
> BE/Antwerp) <bart.bogaert@nokia.com>
> Sent: Thursday, 5 April 2018 8:21 p.m.
> To: netmod@ietf.org
> Subject: [netmod] An abundant amount of IANA if types...
>  
> Hi,
>  
> We were wondering if it would make sense to introduce features in the IANA if
> types YANG model to enable grouping of related interface types.  This would
> allow implementations to include only the types it really requires (by
> supporting the related features but not the others) and (in case of a CLI
> interface) would reduce the possible completions if an operator would ask for
> the possible values of the type of an interface.
> Has this ever been considered/discussed?
>  
> Best regards,
> Bart
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod
-- 
Ladislav Lhotka
Head, CZ.NIC Labs
PGP Key ID: 0xB8F92B08A9F76C67

v2.23.0 | Report a Bug | By Email