Re: [mpls] working group last call on draft-ietf-mpls-tp-p2mp-framework

"Zhenlong Cui" <c-sai@bx.jp.nec.com> Tue, 22 October 2013 09:19 UTC

Return-Path: <c-sai@bx.jp.nec.com>
X-Original-To: mpls@ietfa.amsl.com
Delivered-To: mpls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1F3ED21F9F50 for <mpls@ietfa.amsl.com>; Tue, 22 Oct 2013 02:19:35 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.09
X-Spam-Level:
X-Spam-Status: No, score=-4.09 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_EQ_JP=1.244, HOST_EQ_JP=1.265, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BOwGHpLLszHq for <mpls@ietfa.amsl.com>; Tue, 22 Oct 2013 02:19:31 -0700 (PDT)
Received: from tyo202.gate.nec.co.jp (TYO202.gate.nec.co.jp [202.32.8.206]) by ietfa.amsl.com (Postfix) with ESMTP id F26A711E82F0 for <mpls@ietf.org>; Tue, 22 Oct 2013 02:19:26 -0700 (PDT)
Received: from mailgate3.nec.co.jp ([10.7.69.197]) by tyo202.gate.nec.co.jp (8.13.8/8.13.4) with ESMTP id r9M9JODY014835; Tue, 22 Oct 2013 18:19:24 +0900 (JST)
Received: from mailsv3.nec.co.jp (imss61.nec.co.jp [10.7.69.156]) by mailgate3.nec.co.jp (8.11.7/3.7W-MAILGATE-NEC) with ESMTP id r9M9JO512211; Tue, 22 Oct 2013 18:19:24 +0900 (JST)
Received: from mail02.kamome.nec.co.jp (mail02.kamome.nec.co.jp [10.25.43.5]) by mailsv3.nec.co.jp (8.13.8/8.13.4) with ESMTP id r9M9JOQ3000442; Tue, 22 Oct 2013 18:19:24 +0900 (JST)
Received: from chojiro.jp.nec.com ([10.26.220.28] [10.26.220.28]) by mail03.kamome.nec.co.jp with ESMTP id BT-MMP-381385; Tue, 22 Oct 2013 18:18:29 +0900
Received: from VPCS7083 ([10.38.126.83] [10.38.126.83]) by mail.jp.nec.com with ESMTPA id BT-MMP-49829; Tue, 22 Oct 2013 18:18:29 +0900
From: "Zhenlong Cui" <c-sai@bx.jp.nec.com>
To: <mpls@ietf.org>
References: <5260B904.2090802@pi.nu>
In-Reply-To: <5260B904.2090802@pi.nu>
Date: Tue, 22 Oct 2013 18:18:29 +0900
Message-ID: <015a01cecf07$abeefcd0$03ccf670$@bx.jp.nec.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Outlook 14.0
Thread-Index: AQKjcmuX2mpL/9O/4vEBAfSw2EoiNZhXKF0g
Content-Language: ja
Cc: draft-ietf-mpls-tp-p2mp-framework@tools.ietf.org
Subject: Re: [mpls] working group last call on draft-ietf-mpls-tp-p2mp-framework
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
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, 22 Oct 2013 09:19:35 -0000

Dear authors,

I have a comment/question on this draft.

As described in section 1.3, in the ring topology, we have to consider the drop-and-continue node case. 
In this case, the drop-and-continue node will become an intermediate point. 
So, can we configure a MEP on an intermediate node(= drop-and-continue node)?

As described in section 3.3 of RFC 6371, a MEP terminates all the OAM packets it receives from the MEG, 
may discards silently if addressing information in the OAM payload is different with termination node. 
It means that the intermediate node must NOT be configured as a MEP when per-node OAM configuration is used, 
because downstream nodes can't receive the OAM packets from root node.

On the other hand, if the intermediate node can't be configured as a MEP, the path protection may 
not be able to work at this point. I think this is a serious problem.

Best regards,
zhenlong

> -----Original Message-----
> From: mpls-bounces@ietf.org [mailto:mpls-bounces@ietf.org] On Behalf Of Loa Andersson
> Sent: Friday, October 18, 2013 1:29 PM
> To: mpls@ietf.org
> Cc: mpls-chairs@tools.ietf.org; draft-ietf-mpls-tp-p2mp-framework@tools.ietf.org
> Subject: [mpls] working group last call on draft-ietf-mpls-tp-p2mp-framework
> 
> Working Group,
> 
> this is to start a two week working group last call on draft-ietf-mpls-tp-p2mp-framework-04.
> 
> Please send your comment to working group mailing lists (mpls@ietf.org).
> 
> We did an IPR poll on this document prior to starting the wglc.
> The each authors responded to the IPR poll that they not aware of any IPR's relating to this document.
> 
> There are no IPRs disclosed against this document.
> 
> The working group last call will end Friday November 1, 2913.
> 
> /Loa
> mpls wg co-chair
> --
> 
> 
> Loa Andersson                        email: loa@mail01.huawei.com
> Senior MPLS Expert                          loa@pi.nu
> Huawei Technologies (consultant)     phone: +46 739 81 21 64
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls