Re: [mpls] working group last call on draft-ietf-mpls-tp-p2mp-framework
Lou Berger <lberger@labn.net> Mon, 04 November 2013 06:22 UTC
Return-Path: <lberger@labn.net>
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 87DD511E82E1 for <mpls@ietfa.amsl.com>; Sun, 3 Nov 2013 22:22:57 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -102.088
X-Spam-Level:
X-Spam-Status: No, score=-102.088 tagged_above=-999 required=5 tests=[AWL=0.511, BAYES_00=-2.599, USER_IN_WHITELIST=-100]
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 Ut3iFe+YZH-Z for <mpls@ietfa.amsl.com>; Sun, 3 Nov 2013 22:22:53 -0800 (PST)
Received: from outbound-ss-1738.bluehost.com (outbound-ss-1738.bluehost.com [74.220.192.106]) by ietfa.amsl.com (Postfix) with SMTP id F327811E81A0 for <mpls@ietf.org>; Sun, 3 Nov 2013 22:22:52 -0800 (PST)
Received: (qmail 8126 invoked by uid 0); 4 Nov 2013 06:22:28 -0000
Received: from unknown (HELO box313.bluehost.com) (69.89.31.113) by oproxy1.mail.unifiedlayer.com with SMTP; 4 Nov 2013 06:22:28 -0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=labn.net; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:References:Subject:CC:To:MIME-Version:From:Date:Message-ID; bh=5nYGJY+dgNpq08RRJPkseuaBpfzGMEZJF+2Dn8iS+VA=; b=ajHJhfRBL7fRIlwETj1hNijSinrZX4GzlXQ5peX/csb/wegcuIg6HZpT8g0x1Nxo4op2NrSkYKQMkcgIx88SxAsFn0F8UsrDNGZ6A0oLz+NRGTNBAi9tq7lQdTKA6MfA;
Received: from box313.bluehost.com ([69.89.31.113]:47801 helo=[127.0.0.1]) by box313.bluehost.com with esmtpa (Exim 4.80) (envelope-from <lberger@labn.net>) id 1VdDYS-0001iG-4i; Sun, 03 Nov 2013 23:22:28 -0700
Message-ID: <52771FCD.1030406@labn.net>
Date: Sun, 03 Nov 2013 20:17:17 -0800
From: Lou Berger <lberger@labn.net>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0
MIME-Version: 1.0
To: Zhenlong Cui <c-sai@bx.jp.nec.com>, mpls@ietf.org
References: <5260B904.2090802@pi.nu> <015a01cecf07$abeefcd0$03ccf670$@bx.jp.nec.com>
In-Reply-To: <015a01cecf07$abeefcd0$03ccf670$@bx.jp.nec.com>
X-Enigmail-Version: 1.6
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7bit
X-Identified-User: {1038:box313.bluehost.com:labnmobi:labn.net} {sentby:smtp auth 69.89.31.113 authed with lberger@labn.net}
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: Mon, 04 Nov 2013 06:22:57 -0000
Zhenlong, Thank you for the comments. Please see below for responses in-line. On 10/22/2013 2:18 AM, Zhenlong Cui wrote: > 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. Agreed. This node will be both a transit node and an egress/leaf. This case is covered in RFC4875. > So, can we configure a MEP on an intermediate node(= drop-and-continue node)? I think this is a matter of semantics. By definition a MEP is only on egress (leaf) nodes and a MIP only on transit nodes. Assuming you are asking about the case stated in the previous point, that a node is both egress and transit, then I think it could have both MEP and MIP functionality separately instantiated. Section 3.7 already covers P2MP MIPs and MEPs. > 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. Why do you say this? If a node is both transit and egress, it will replicate OAM packets (just like the data) when performing its transit role before then terminating the data/OAM packets as part of its egress role. > > 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. > Perhaps I'm missing something, but I simply don't see an issue here that isn't already addressed in RFC6371 (and 4875.) I guess 6371 could have shown this case as an example, or provided a related detailed walk through, but either way I don't see any "serious problem" here. Perhaps the best way to proceed on this is to propose text to the already referenced "additional detail" draft draft-hmk-mpls-tp-p2mp-oam-framework. Does this work for you? Thanks, Lou > 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 > > > > >
- [mpls] working group last call on draft-ietf-mpls… Loa Andersson
- Re: [mpls] working group last call on draft-ietf-… Zhenlong Cui
- [mpls] Closed : working group last call on draft-… Loa Andersson
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Zhenlong Cui
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Zhenlong Cui
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Zhenlong Cui
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Gregory Mirsky
- Re: [mpls] working group last call on draft-ietf-… Gregory Mirsky
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Lou Berger
- Re: [mpls] working group last call on draft-ietf-… Gregory Mirsky
- Re: [mpls] working group last call on draft-ietf-… Zhenlong Cui