RE: [EME] First cut at eme requirements

"Paul Francis" <francis@cs.cornell.edu> Tue, 05 December 2006 16:31 UTC

Received: from [127.0.0.1] (helo=stiedprmman1.va.neustar.com) by megatron.ietf.org with esmtp (Exim 4.43) id 1GrdCX-0006Oa-7I; Tue, 05 Dec 2006 11:31:25 -0500
Received: from [10.91.34.44] (helo=ietf-mx.ietf.org) by megatron.ietf.org with esmtp (Exim 4.43) id 1GrdCV-0006Ku-7h for eme@irtf.org; Tue, 05 Dec 2006 11:31:23 -0500
Received: from exchfenlb-2.cs.cornell.edu ([128.84.97.34] helo=exchfe2.cs.cornell.edu) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1GrdCT-0003pg-Vg for eme@irtf.org; Tue, 05 Dec 2006 11:31:23 -0500
Received: from EXCHANGE2.cs.cornell.edu ([128.84.96.44]) by exchfe2.cs.cornell.edu with Microsoft SMTPSVC(6.0.3790.1830); Tue, 5 Dec 2006 11:31:21 -0500
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Subject: RE: [EME] First cut at eme requirements
Date: Tue, 5 Dec 2006 11:31:19 -0500
Message-ID: <E6F7A586E0A3F94D921755964F6BE00672E365@EXCHANGE2.cs.cornell.edu>
In-Reply-To: <4575444D.2080903@wanadoo.fr>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Thread-Topic: [EME] First cut at eme requirements
Thread-Index: AccYVP8xJt0NSCI0RtaAgHNYB2J0IgANYTRg
From: "Paul Francis" <francis@cs.cornell.edu>
To: =?iso-8859-1?Q?R=E9mi_Despr=E9s?= <remi.despres@wanadoo.fr>
X-OriginalArrivalTime: 05 Dec 2006 16:31:21.0320 (UTC) FILETIME=[CC29E680:01C7188A]
X-Spam-Score: 0.0 (/)
X-Scan-Signature: d8ae4fd88fcaf47c1a71c804d04f413d
Cc: eme <eme@irtf.org>
X-BeenThere: eme@irtf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: end-middle-end research group <eme.irtf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/eme>, <mailto:eme-request@irtf.org?subject=unsubscribe>
List-Archive: <http://www1.ietf.org/pipermail/eme>
List-Post: <mailto:eme@irtf.org>
List-Help: <mailto:eme-request@irtf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/eme>, <mailto:eme-request@irtf.org?subject=subscribe>
Errors-To: eme-bounces@irtf.org

Do you find Scott's definition to be insufficient or too involved?  (Repeated
here for convenience)
 
A middlebox refers to a network element which involves itself in
communication between endpoints by performing functions apart from standard
functions of an IP router. A middlebox may keep per-flow state or may be
stateless. Like endpoints, middleboxes may also have local policy governing
which endpoints may communicate over the particular network.

 
PF

________________________________

From: Rémi Després [mailto:remi.despres@wanadoo.fr] 
Sent: Tuesday, December 05, 2006 5:05 AM
To: Paul Francis
Cc: Scott W Brim; eme
Subject: Re: [EME] First cut at eme requirements


I wonder whether an easy characterization of EME middleboxes couldn't be that
they may modify IP packets.
("IP Packets" are no longer E2E. Only part of their semantics is.)

RD

Paul Francis wrote : 

	These are all reasonable comments...happy to incorporate them in the
next
	revision.
	
	PF
	
	 
	
	-----Original Message-----
	From: Scott W Brim [mailto:swb@employees.org] 
	Sent: Tuesday, November 28, 2006 2:39 PM
	To: Paul Francis
	Cc: eme
	Subject: Re: [EME] First cut at eme requirements
	
	On 11/28/2006 10:30 AM, Paul Francis wrote:
	  

		   Middlebox:  A middlebox refers to a network element
assisting
		      endpoints to communicate through that network.  A
middlebox may
		      keep per-flow state or may be stateless.  Like
endpoints,
		      middleboxes may also have local policy governing which
endpoints
		      may communicate over the particular network.
		    

	
	This isn't an easy definition.  Not all middleboxes "assist"
	communication -- some either restrict it or allow it.  Also I believe
we want
	to exclude routers from the definition.  Finally, some middleboxes
are pure
	control, some are pure data plane, some are mixed.  What about pure
policy
	boxes?
	
	  
	  


_______________________________________________
EME mailing list
EME@irtf.org
https://www1.ietf.org/mailman/listinfo/eme