Re: [mpls] Review and Consensus call on text from the MPLS Open DT on in-stack indicators
gregory.mirsky@ztetx.com Fri, 06 August 2021 22:34 UTC
Return-Path: <gregory.mirsky@ztetx.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 C16FA3A1B67; Fri, 6 Aug 2021 15:34:11 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.894
X-Spam-Level:
X-Spam-Status: No, score=-1.894 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_FONT_FACE_BAD=0.001, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
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 c2TX-XDR--0J; Fri, 6 Aug 2021 15:34:07 -0700 (PDT)
Received: from mxus.zteusa.com (mxus.zteusa.com [4.14.134.162]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0375D3A1B65; Fri, 6 Aug 2021 15:34:05 -0700 (PDT)
Received: from mse-us.zte.com.cn (unknown [10.36.11.29]) by Forcepoint Email with ESMTPS id 2FA0BBFB044E1A429D45; Sat, 7 Aug 2021 06:34:04 +0800 (CST)
Received: from mgapp02.zte.com.cn ([10.36.9.143]) by mse-us.zte.com.cn with SMTP id 176MXwSe001176; Sat, 7 Aug 2021 06:33:58 +0800 (GMT-8) (envelope-from gregory.mirsky@ztetx.com)
Received: from mapi (mgapp01[null]) by mapi (Zmail) with MAPI id mid81; Sat, 7 Aug 2021 06:33:58 +0800 (CST)
Date: Sat, 07 Aug 2021 06:33:58 +0800
X-Zmail-TransId: 2af9610db8d6d81ea89b
X-Mailer: Zmail v1.0
Message-ID: <202108070633582444608@zte.com.cn>
In-Reply-To: <CAMZsk6euHa=MQaZ_kcXdv72-Qaij5oJwPTT4OhSZ7vusMMJcuQ@mail.gmail.com>
References: 1cfaeafc-7d2c-7e04-c6e2-767feb6e8364@pi.nu, CAMZsk6euHa=MQaZ_kcXdv72-Qaij5oJwPTT4OhSZ7vusMMJcuQ@mail.gmail.com
Mime-Version: 1.0
From: gregory.mirsky@ztetx.com
To: rgandhi.ietf@gmail.com
Cc: loa@pi.nu, mpls@ietf.org, pals-chairs@ietf.org, mpls-chairs@ietf.org, detnet-chairs@ietf.org
Content-Type: multipart/mixed; boundary="=====_001_next====="
X-MAIL: mse-us.zte.com.cn 176MXwSe001176
Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/PCoF7uXMaCZkZOc6XzzXjKLkVsA>
Subject: Re: [mpls] Review and Consensus call on text from the MPLS Open DT on in-stack indicators
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.29
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: <https://mailarchive.ietf.org/arch/browse/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: Fri, 06 Aug 2021 22:34:12 -0000
Hi Rakesh, I don't think any IETF document dictates that an MPLS packet with GAL/G-ACh must be "punted out of the fast path in forwarding". I always thought that how a packet is processed is entirely implementation detail, which is also applicable to packets with GAL/G-ACh. For example, for many years now, BFD is supported using HW, whether over IP or MPLS data planes. I can imagine that in an MPLS-TP environment with non-IP encapsulation, BFD control messages over the Continuity Check G-ACh channel (0x0022), still be processed in HW without being punted to the slow-path processing. Regards, Greg Mirsky Sr. Standardization Expert 预研标准部/有线研究院/有线产品经营部 Standard Preresearch Dept./Wireline Product R&D Institute/Wireline Product Operation Division E: gregory.mirsky@ztetx.com www.zte.com.cn Original Mail Sender: RakeshGandhi To: Loa Andersson; CC: mpls@ietf.org;pals-chairs@ietf.org;mpls-chairs@ietf.org;DetNet Chairs; Date: 2021/08/06 07:01 Subject: Re: [mpls] Review and Consensus call on text from the MPLS Open DT on in-stack indicators _______________________________________________ mpls mailing list mpls@ietf.org https://www.ietf.org/mailman/listinfo/mpls Hi WG, One comment on the following text with <RG>: We have a standardized associated channel, the GAL/GACH. We are not going to change the associated channel in anyway that breaks existing implementations. The ACH is found immediately after the label carrying the Bottom of Stack (BoS) bit. Currently, there is no defined method to carry multiple ACHs in the same MPLS packet. GAL/GACH will only be an OAM or instrumentation tool and will not be used to carry meta-data with user-traffic. <RG> The last sentence needs some clarification. The packet with GAL is punted out of the fast path in forwarding, so user-traffic does not carry it, so it makes sense. However, packets could carry GACH without GAL. The user-traffic could also carry a GACH without GAL if use-case makes sense. I am not sure we are ready to add this restriction just yet. Thanks, Rakesh On Thu, Aug 5, 2021 at 10:52 AM Loa Andersson <loa@pi.nu> wrote: Working Group, MPLS Open DT, The week before IETF 111 the Open DT met and agreed upon a text on "indicators". The terminology we use is that somewhere in the label stack there is an indicator tell the processing node that a specific packet needs a certain set of Forwarding Actions, for example some iOAM action might be required. To support the forwarding action there is often ancillary data with the packet. The text the DT produced is about the indicators, a companion text on ancillary data will follow. The text was discussed in the Joint meeting and reported to the MPLS working group at IETF 111. The Open DT itself can only propose, the text is therefore now sent out to the working group for review and consensus call. The proposed text is found at: https://trac.ietf.org/trac/mpls/wiki/2021-07-22-agenda Please review the proposed text and comment on the MPLS wg mailing list (mpls@ietf.org). We plan to keep the consensus call open until 2021-08-20. /Loa Open DT Co-ordinator / MPLS wg co-chair -- Loa Andersson email: loa@pi.nu Senior MPLS Expert loa.pi.nu@gmail.com Bronze Dragon Consulting phone: +46 739 81 21 64 _______________________________________________ mpls mailing list mpls@ietf.org https://www.ietf.org/mailman/listinfo/mpls
- [mpls] Review and Consensus call on text from the… Loa Andersson
- Re: [mpls] Review and Consensus call on text from… Toerless Eckert
- Re: [mpls] Review and Consensus call on text from… Kireeti Kompella
- Re: [mpls] Review and Consensus call on text from… Haoyu Song
- Re: [mpls] Review and Consensus call on text from… Toerless Eckert
- Re: [mpls] Review and Consensus call on text from… Haoyu Song
- Re: [mpls] Review and Consensus call on text from… Toerless Eckert
- Re: [mpls] Review and Consensus call on text from… Haoyu Song
- Re: [mpls] Review and Consensus call on text from… Toerless Eckert
- Re: [mpls] Review and Consensus call on text from… Loa Andersson
- Re: [mpls] Review and Consensus call on text from… bruno.decraene
- Re: [mpls] Review and Consensus call on text from… Rakesh Gandhi
- Re: [mpls] Review and Consensus call on text from… tom petch
- Re: [mpls] Review and Consensus call on text from… gregory.mirsky
- Re: [mpls] Review and Consensus call on text from… gregory.mirsky
- Re: [mpls] Review and Consensus call on text from… Toerless Eckert
- Re: [mpls] Review and Consensus call on text from… Stewart Bryant