Re: [ippm] I-D Action: draft-gandhi-ippm-stamp-srpm-03.txt

Mach Chen <> Sat, 08 May 2021 03:17 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 33BED3A3754 for <>; Fri, 7 May 2021 20:17:35 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -1.898
X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_BLOCKED=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id mLKgmSlQJgPS for <>; Fri, 7 May 2021 20:17:32 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id D6AD53A374C for <>; Fri, 7 May 2021 20:17:31 -0700 (PDT)
Received: from (unknown []) by (SkyGuard) with ESMTP id 4FcXNH4wpRz6pn65; Sat, 8 May 2021 11:09:19 +0800 (CST)
Received: from ( by ( with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Sat, 8 May 2021 05:17:26 +0200
Received: from ( by ( with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Sat, 8 May 2021 11:17:25 +0800
Received: from ([]) by ([]) with mapi id 15.01.2176.012; Sat, 8 May 2021 11:17:25 +0800
From: Mach Chen <>
To: "Foote, Footer (Nokia - CA)" <>, Tommy Pauly <>, IETF IPPM WG <>
Thread-Topic: [ippm] I-D Action: draft-gandhi-ippm-stamp-srpm-03.txt
Date: Sat, 08 May 2021 03:17:24 +0000
Message-ID: <>
References: <> <> <> <>
In-Reply-To: <>
Accept-Language: en-US, zh-CN
Content-Language: zh-CN
x-originating-ip: []
Content-Type: multipart/alternative; boundary="_000_f2a9544498784e939953b6ae358d0992huaweicom_"
MIME-Version: 1.0
X-CFilter-Loop: Reflected
Archived-At: <>
Subject: Re: [ippm] I-D Action: draft-gandhi-ippm-stamp-srpm-03.txt
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF IP Performance Metrics Working Group <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Sat, 08 May 2021 03:17:35 -0000

Indeed, I agree with Footer and think that the draft is ready for WG adoption.

Best regards,

From: ippm [] On Behalf Of Foote, Footer (Nokia - CA)
Sent: Saturday, May 8, 2021 5:45 AM
To: Tommy Pauly <>; IETF IPPM WG <>
Subject: Re: [ippm] I-D Action: draft-gandhi-ippm-stamp-srpm-03.txt


As a recent co-author, I feel this work introduces some benefits that should be considered.  This draft leverages the flexibility introduced by Simple Two-Way Active Measurement Protocol Optional Extensions [RFC8972] adding specific uses cases for Segment Routing IPv6 (SRv6) and Segment Routing MPLS (SR-MPLS) networks looking to use STAMP.  The TLVs introduced by this draft allow for instruction based messaging between the STAMP session-sender and STAMP session-reflector to influence the return path, for end to end measurement, including a SR MPLS Label Stack and SRv6 Segment List.  These optional extension allow for the one-way forward and one-way backward delay measurements to represent the same collection of links and nodes between the STAMP session-sender and STAMP session-reflector in each directions.  It also introduces the ability to instruct the STAMP session-reflector to utilize the same link between directly connected IP peers.  This also allows for the STAMP session-reflector to skip the global route lookup, if that is the preferred method to determine return next-hop, to ensure the same directly connected IP link is used in both directions, and not some other link that is of each cost.

I believe it important to leverage and grow the work done by Simple Two-Way Active Measurement Protocol Optional Extensions [RFC8972] to make use of STAMP in different environments, in this case Segment Routing.

Have a great weekend.


From: ippm <<>> On Behalf Of Tommy Pauly
Sent: Friday, 7 May 2021 16:43
Subject: Re: [ippm] I-D Action: draft-gandhi-ippm-stamp-srpm-03.txt


This draft has been discussed and debated at length before, and the chairs would like to get input from the WG on their thoughts on this version of the document and its direction. Given the interaction with other working groups, we’d like to make progress on this in a timely fashion.

Please do send your thoughts and feedback to the list, particularly if you support this work, or if you have concerns new or existing.


On May 3, 2021, at 9:42 AM, Rakesh Gandhi <<>> wrote:

Hi WG,
This revision contains following updates:

·         Welcome Richard as a co-author

·         Merge Segment List Sub-TLVs

·         Various editorial changes

Welcome your review comments and suggestions.

Rakesh (for co-authors)

On Thu, Apr 29, 2021 at 7:03 PM <<>> wrote:

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Performance Measurement WG of the IETF.

        Title           : Simple TWAMP (STAMP) Extensions for Segment Routing Networks
        Authors         : Rakesh Gandhi
                          Clarence Filsfils
                          Daniel Voyer
                          Mach(Guoyi) Chen
                          Bart Janssens
                          Richard Foote
        Filename        : draft-gandhi-ippm-stamp-srpm-03.txt
        Pages           : 12
        Date            : 2021-04-29

   Segment Routing (SR) leverages the source routing paradigm.  SR is
   applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6
   (SRv6) data planes.  This document specifies RFC 8762 (Simple Two-Way
   Active Measurement Protocol (STAMP)) extensions for SR networks, for
   both SR-MPLS and SRv6 data planes by augmenting the optional
   extensions defined in RFC 8972.

The IETF datatracker status page for this draft is:

There are also htmlized versions available at:

A diff from the previous version is available at:

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at<>.

Internet-Drafts are also available by anonymous FTP at:

ippm mailing list<>
ippm mailing list<>