IETF Logo Mail Archive

Re: [mpls] Comments on draft-bryant-mpls-oam-udp-return

Stewart Bryant <stbryant@cisco.com> Tue, 20 May 2014 15:50 UTC

Return-Path: <stbryant@cisco.com>
X-Original-To: mpls@ietfa.amsl.com
Delivered-To: mpls@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 50C0C1A0774 for <mpls@ietfa.amsl.com>; Tue, 20 May 2014 08:50:27 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.151
X-Spam-Level:
X-Spam-Status: No, score=-10.151 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-0.651, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham
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 3KMJ7IAd5pJC for <mpls@ietfa.amsl.com>; Tue, 20 May 2014 08:50:24 -0700 (PDT)
Received: from aer-iport-3.cisco.com (aer-iport-3.cisco.com [173.38.203.53]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9CE251A0771 for <mpls@ietf.org>; Tue, 20 May 2014 08:50:23 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10028; q=dns/txt; s=iport; t=1400601023; x=1401810623; h=message-id:date:from:reply-to:mime-version:to:cc:subject: references:in-reply-to; bh=uPeu7TTLJNDfKg/pamp/ghGYQ6Mthuog079HejJ+bBg=; b=IOuSkeS6LyhHZwi8apx0DQaK7rRVkxAmT4t7S9bCKHbmnYBQHLzzPhk/ vvBTCO/TqFT6TKUQT6MyECWBB4PAnc0PLvzjvnoG3lX1Jk6pH88R6S62o qAA8iFNs07DVPQjfSp3l42yA0tdDLtCphSuP0zDWAaGK1399MbOuAZB67 c=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AqQEAMN4e1OtJssW/2dsb2JhbABZgkKBFcRuAYEydIIlAQEBBC06EQEQCxEEAQEBCRYIBwkDAgECATQJCAYBDAEFAgEBiD0NtUGeEheOLCIGAQaEOgSZaJMggzls
X-IronPort-AV: E=Sophos; i="4.98,874,1392163200"; d="scan'208,217"; a="51695085"
Received: from aer-iport-nat.cisco.com (HELO aer-core-3.cisco.com) ([173.38.203.22]) by aer-iport-3.cisco.com with ESMTP; 20 May 2014 15:50:21 +0000
Received: from cisco.com (mrwint.cisco.com [64.103.70.36]) by aer-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id s4KFoLWJ011079 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 20 May 2014 15:50:21 GMT
Received: from STBRYANT-M-R010.CISCO.COM (localhost [127.0.0.1]) by cisco.com (8.14.4+Sun/8.8.8) with ESMTP id s4KFoKuU012058; Tue, 20 May 2014 16:50:20 +0100 (BST)
Message-ID: <537B79BC.9080006@cisco.com>
Date: Tue, 20 May 2014 16:50:20 +0100
From: Stewart Bryant <stbryant@cisco.com>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.5.0
MIME-Version: 1.0
To: Eric Gray <eric.gray@ericsson.com>, Gregory Mirsky <gregory.mirsky@ericsson.com>, "draft-bryant-mpls-oam-udp-return@tools.ietf.org" <draft-bryant-mpls-oam-udp-return@tools.ietf.org>
References: <7347100B5761DC41A166AC17F22DF1121B79D6DE@eusaamb103.ericsson.se> <534535F8.6090408@cisco.com> <48E1A67CB9CA044EADFEAB87D814BFF632A54011@eusaamb107.ericsson.se> <53455996.9060407@cisco.com> <48E1A67CB9CA044EADFEAB87D814BFF632A55453@eusaamb107.ericsson.se>
In-Reply-To: <48E1A67CB9CA044EADFEAB87D814BFF632A55453@eusaamb107.ericsson.se>
Content-Type: multipart/alternative; boundary="------------000505000504080403080809"
Archived-At: http://mailarchive.ietf.org/arch/msg/mpls/gP-zuxKqY-7kRQ4YN9p11FY9TRk
Cc: "mpls@ietf.org" <mpls@ietf.org>
Subject: Re: [mpls] Comments on draft-bryant-mpls-oam-udp-return
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: stbryant@cisco.com
List-Id: Multi-Protocol Label Switching WG <mpls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mpls>, <mailto:mpls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mpls/>
List-Post: <mailto:mpls@ietf.org>
List-Help: <mailto:mpls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mpls>, <mailto:mpls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 20 May 2014 15:50:27 -0000

Apropos the above, the proposal in the draft is simple and
satisfies a need that an operator has requested us to address.

In this case I do not think a complete test protocol is needed or justified,
and in any case would be a lot more effort to implement compared
to the proposal on the table.

I would like to understand how best to move forward with this.

- Stewart



On 10/04/2014 15:06, Eric Gray wrote:
>
> I agree with the port reviewers.  A well-known port would have been a 
> target.
>
> *From:*Stewart Bryant [mailto:stbryant@cisco.com]
> *Sent:* Wednesday, April 09, 2014 10:31 AM
> *To:* Eric Gray; Gregory Mirsky; 
> draft-bryant-mpls-oam-udp-return@tools.ietf.org
> *Cc:* mpls@ietf.org
> *Subject:* Re: [mpls] Comments on draft-bryant-mpls-oam-udp-return
> *Importance:* High
>
> On 09/04/2014 13:58, Eric Gray wrote:
>
>     Stewart,
>
>     Well, you're adding 4 bytes to handle the case where the response
>     is to be
>
>     returned using UDP.  This is in addition to the address
>     information already included
>
>     in the message as defined by RFC 6374.
>
> Sure
>
> It's certainly arguable that this new information does not need to be 
> carried
>
> in the test messages, assuming that there might be a control protocol 
> used instead.
>
>
>
> The question as to whether or not this is "heavy-weight" depends on how
>
> many additional ways one might envision returning the response.
>
> Well I am not convinced that you would want to send it over TCP.
> We already have a way to return it over MPLS - via LSP association
> or via the use of a first hop label encoded in the address field.
> That leaves UDP/IP which this draft deals with.
>
> Our first thoughts were BTW to request a UDP port, and we submitted
> a port request, but the port reviewers suggested that we should find a
> way to do it using dynamic ports, and that is what the draft describes.
>
> Stewart
>


-- 
For corporate legal information go to:

http://www.cisco.com/web/about/doing_business/legal/cri/index.html

v2.23.0 | Report a Bug | By Email