Re: UDP encaps for SCTP and SCCP

Lars Eggert <lars.eggert@nokia.com> Tue, 18 May 2010 07:38 UTC

Return-Path: <lars.eggert@nokia.com>
X-Original-To: tsvwg@core3.amsl.com
Delivered-To: tsvwg@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 195213A68B0; Tue, 18 May 2010 00:38:44 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -5.357
X-Spam-Level:
X-Spam-Status: No, score=-5.357 tagged_above=-999 required=5 tests=[AWL=-0.617, BAYES_20=-0.74, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BgV0V6QypHGb; Tue, 18 May 2010 00:38:43 -0700 (PDT)
Received: from mgw-mx06.nokia.com (smtp.nokia.com [192.100.122.233]) by core3.amsl.com (Postfix) with ESMTP id 08EDB3A6942; Tue, 18 May 2010 00:38:26 -0700 (PDT)
Received: from esebh105.NOE.Nokia.com (esebh105.ntc.nokia.com [172.21.138.211]) by mgw-mx06.nokia.com (Switch-3.3.3/Switch-3.3.3) with ESMTP id o4I7cBHM017939; Tue, 18 May 2010 10:38:16 +0300
Received: from vaebh104.NOE.Nokia.com ([10.160.244.30]) by esebh105.NOE.Nokia.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 18 May 2010 10:38:12 +0300
Received: from mgw-sa01.ext.nokia.com ([147.243.1.47]) by vaebh104.NOE.Nokia.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Tue, 18 May 2010 10:38:02 +0300
Received: from mail.fit.nokia.com (esdhcp030222.research.nokia.com [172.21.30.222]) by mgw-sa01.ext.nokia.com (Switch-3.3.3/Switch-3.3.3) with ESMTP id o4I7c1Hu012213 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 18 May 2010 10:38:01 +0300
Subject: Re: UDP encaps for SCTP and SCCP
X-Virus-Status: Clean
X-Virus-Scanned: clamav-milter 0.96 at fit.nokia.com
Mime-Version: 1.0 (Apple Message framework v1078)
Content-Type: multipart/signed; boundary="Apple-Mail-69--491673321"; protocol="application/pkcs7-signature"; micalg="sha1"
From: Lars Eggert <lars.eggert@nokia.com>
In-Reply-To: <9693C831-4EE4-4FC5-84A2-083DA16C1CD6@nokia.com>
Date: Tue, 18 May 2010 10:37:49 +0300
Message-Id: <F969C7A1-3ED7-4C93-B30A-27E513985932@nokia.com>
References: <9693C831-4EE4-4FC5-84A2-083DA16C1CD6@nokia.com>
To: "tsvwg@ietf.org" <tsvwg@ietf.org>
X-Mailer: Apple Mail (2.1078)
X-OriginalArrivalTime: 18 May 2010 07:38:02.0140 (UTC) FILETIME=[0BA785C0:01CAF65D]
X-Nokia-AV: Clean
Cc: DCCP working group <dccp@ietf.org>, TSV Area <tsv-area@ietf.org>
X-BeenThere: tsvwg@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Transport Area Working Group <tsvwg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/tsvwg>, <mailto:tsvwg-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tsvwg>
List-Post: <mailto:tsvwg@ietf.org>
List-Help: <mailto:tsvwg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tsvwg>, <mailto:tsvwg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 18 May 2010 07:38:44 -0000

Hi,

the discussion has touched on lots of things related to UDP encaps, but I haven't seen anything I'd call consensus on the question below. I'd therefore like to ask folks to specifically state which option they support:

(1) do one SCTP-specific and one DCCP-specific UDP encaps
(2) do one generic UDP encaps that can be used with both
(3) do neither (don't do any sort of UDP encaps for SCTP and DCCP)

Thanks,
Lars

On 2010-4-22, at 12:57, Eggert Lars (Nokia-NRC/Espoo) wrote:
> Hi,
> 
> as most of you probably know, there are two different proposals for how to encapsulate SCTP and DCCP inside UDP.
> 
> One approach proposes two protocol-specific encapsulation schemes (described in draft-tuexen-sctp-udp-encaps and draft-ietf-dccp-udpencap).
> 
> The second approach proposes a generic encapsulation scheme that can be applied to both SCTP and DCCP (draft-manner-tsvwg-gut).
> 
> As a community, we do need to come to consensus on which of these two approaches we want to follow when it comes to UDP encapsulation of SCTP and DCCP. I believe it would be very confusing if we were to standardize both approaches.
> 
> I'd hence like to ask folks to read the three documents and post their views to the tsvwg@ietf.org list. I'm personally especially interested in hearing from folks who aren't on the author lists of the documents, but obviously, the authors expert opinions do matter.
> 
> Thanks,
> Lars
> 
> PS: I'm pushing on this topic, because UDP encapsulation is the last remaining work item in the DCCP working group before it can close...