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Server (TLS) id 15.0.1395.4; Sun, 16 Dec 2018 23:19:33 -0500 Received: from xch-rtp-001.cisco.com ([64.101.220.141]) by XCH-RTP-001.cisco.com ([64.101.220.141]) with mapi id 15.00.1395.000; Sun, 16 Dec 2018 23:19:33 -0500 From: "Brian Weis (bew)" To: John Lemon CC: "Frank Brockners (fbrockne)" , "Shwetha Bhandari (shwethab)" , Tal Mizrahi , Mickey Spiegel , Barak Gafni , Aviv Kfir , "Ramesh Sivakolundu (sramesh)" , "bew.stds@gmail.com" Subject: Re: IOAM GRE Encapsulation Question Thread-Topic: IOAM GRE Encapsulation Question Thread-Index: AQHUka0yMlK8ga53gk6b+WY2TeDk8aV69hwAgAEyioCABpgBgA== Date: Mon, 17 Dec 2018 04:19:33 +0000 Message-ID: References: <90F06091-DB58-43AB-9ACD-4B934B71ABBB@cisco.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Exchange-Organization-AuthMechanism: 04 X-MS-Exchange-Organization-AuthSource: XCH-RTP-001.cisco.com X-MS-Has-Attach: X-MS-TNEF-Correlator: X-MS-Exchange-Organization-RecordReviewCfmType: 0 x-originating-ip: [10.19.191.165] 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[127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NahN4NElGSV8; Mon, 2 Sep 2019 04:29:44 -0700 (PDT) Received: from wp513.webpack.hosteurope.de (wp513.webpack.hosteurope.de [IPv6:2a01:488:42:1000:50ed:8223::]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DD18A120052; Mon, 2 Sep 2019 04:29:43 -0700 (PDT) Received: from 200116b82c5b2300dc80f3be8794e65e.dip.versatel-1u1.de ([2001:16b8:2c5b:2300:dc80:f3be:8794:e65e]); authenticated by wp513.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) id 1i4kWe-0005rE-AG; Mon, 02 Sep 2019 13:29:36 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: Mirja Kuehlewind In-Reply-To: <4D7F4AD313D3FC43A053B309F97543CFA0AF30B4@njmtexg5.research.att.com> Date: Mon, 2 Sep 2019 13:29:35 +0200 Cc: "draft-ietf-ippm-initial-registry.all@ietf.org" , IETF IPPM WG , Michelle Cotton Content-Transfer-Encoding: quoted-printable Message-Id: References: <40A0B71C-4857-46F0-9096-6EE289E7404B@kuehlewind.net> <4D7F4AD313D3FC43A053B309F97543CFA0AF30B4@njmtexg5.research.att.com> To: "MORTON, ALFRED C (AL)" X-Mailer: Apple Mail (2.3445.104.11) X-bounce-key: webpack.hosteurope.de;ietf@kuehlewind.net;1567423783;fcc33158; X-HE-SMSGID: 1i4kWe-0005rE-AG Archived-At: Subject: Re: [ippm] AD review of draft-ietf-ippm-initial-registry-11 X-BeenThere: ippm@ietf.org 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: Mon, 02 Sep 2019 11:29:47 -0000 Hi Al, Thanks for the background info. Sorry, I should have explained myself = better. However, I don=E2=80=99t have a strong opinion on which status = we end up with but I would really like to make sure that the intended = status is well explained in the shepherd write-up in order to provided = the other ADs the needed background information during IESG review. My think was that this document does actually not specify any new metric = and as the registry only requires =E2=80=9CExpert Review=E2=80=9D, = informational felt more natural for me. However, this is for the working = group to decide! Mirja > On 30. Aug 2019, at 22:20, MORTON, ALFRED C (AL) = wrote: >=20 > Hi Mirja, >=20 > Thanks for reviewing these two memos,=20 > registry and initial contents. They added a lot > of pages to your review load. >=20 > I don't recollect a list discussion on=20 > whether PS or Info, but years ago we decided > that all metric RFCs would go on the Standards Track, > and devised ways to evaluate whether they should=20 > advance based on testing and ultimately=20 > revised text. So, it seemed natural to make these > "tighter specifications of the original metrics" > PS, and that's been the status since 00. >=20 > With this background, I'm interested to learn why > Informational seems the right choice to you, > and we should all think about the implications=20 > of Info or PS for the metrics in this=20 > draft-*-initial-registry. >=20 > regards, > Al >=20 >> -----Original Message----- >> From: Mirja Kuehlewind [mailto:ietf@kuehlewind.net] >> Sent: Tuesday, August 27, 2019 11:47 AM >> To: draft-ietf-ippm-initial-registry.all@ietf.org >> Cc: IETF IPPM WG ; Michelle Cotton >> >> Subject: AD review of draft-ietf-ippm-initial-registry-11 >>=20 >> Hi authors, hi all, >>=20 >> We need to discuss at least one bigger question on the intended = status >> before we can move ahead. However, as you can seen I have more >> questions/comments below. >>=20 >> The bigger status question first: >> The intended status is PS. The shepherd write-up does not provide any >> additional information about why this status is appropriate. I would >> assume that informational is actually more appropriate. I don=E2=80=99t= recall out >> of my head if/when this was discussed and I thought I rather ask than >> searching the list archive and minutes=E2=80=A6 Is this the right = status and why? >> And if so, please reflect in the write-up! >>=20 >>=20 >> And then a couple more (hopefully) quicker comments/questions: >>=20 >> - I know this was already reviewed by IANA (Michelle is also = cc=E2=80=99ed), >> however, as far as I can see all Administrative Information (Status, >> Requestor, Revision, and Revision Date) and maybe even the ID don=E2=80= =99t need >> to be part of the template because IANA will anyway assign them based = on >> the instructions given in draft-ietf-ippm-metric-registry. Or did = IANA >> explicitly request to also include these parts? >>=20 >> - Then for the Change Controller that should usually be the IESG = rather >> than the IETF. Did IANA comment on that? >>=20 >> - And one minor point: I guess the secY part of the name could = already be >> filled out, no? However, I should probably have asked that on review = of >> draft-ietf-ippm-metric-registry already but I was actually wondering = if >> the decision to include the RFC number and section in the metric name = is >> appropriate. Can you maybe lay out what the reasons for this are (and >> maybe also explain in the draft as his might come up again during = IESG >> review otherwise)=E2=80=A6? >>=20 >>=20 >> Then then on references again: >>=20 >> - This draft references two obsoleted RFCs (RFC2679 and RFC2680). I = assume >> this is an oversight and the references need to be updated? >>=20 >> - Also given you rely heavily on [Trammell-14], I think this needs to = be a >> normative reference (and maybe [Strowes] as well?). The more stable >> pointer for [Trammell-14] is actually here: >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps- >> 3A__link.springer.com_chapter_10.1007_978-2D3-2D642-2D54999-2D1- >> = 5F2&d=3DDwIFaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3Dh= wJZg- >> = IdxQ9507aw2mjEKKOSWIEVnc8nwr7B_QiOyCU&s=3DHSEAeC_uI-vofX5ZWPSCH-R4Ph8Gu618= - >> YtZJ4pTAgE&e=3D >> But to be honest the split between normative and informational = isn=E2=80=99t >> actually very clear to me here=E2=80=A6? >>=20 >>=20 >> And on the shepherd write-up: >>=20 >> It=E2=80=99s indicated that not all authors have replied to the IPR = question. This >> need to be checked and respectively reflected in the shepherd = write-up >> before we can move ahead! >>=20 >>=20 >> And some smaller technical questions/nits: >>=20 >> - Is it correct that T0 in section 4 is defined in both subsections = 4.3.5 >> and 4.4.2? >>=20 >> - Why is an URI given (only) in section 6.1.3? >> Also section 7.1.3 and 8.1.3.: http:\\www.iana.org\ ... -> I >> think this should be: = https://urldefense.proofpoint.com/v2/url?u=3Dhttp- >> 3A__www.iana.org_&d=3DDwIFaQ&c=3DLFYZ- >> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DhwJZg- >> IdxQ9507aw2mjEKKOSWIEVnc8nwr7B_QiOyCU&s=3D9PuQd07oTFlEt8tWIDYz4c- >> qFUd4zpyT_7QeckyeAsc&e=3D/ >>=20 >>=20 >> Some more editorial comments/nits: >>=20 >> - I find it actually unnecessary or rather confusing that most (not = all) >> sections start with a sentence/paragraph explaining what the section = is >> about (e.g. "Additional (Informational) details for this entry=E2=80=9D= ). I would >> think this is sufficiently explained in = draft-ietf-ippm-metric-registry >> and does not need to be repeated here (in this already long = document). >> Also note that section 8.6 inconsistently doesn=E2=80=99t have any = content while >> 10.6. says =E2=80=9CNone.=E2=80=9D. >>=20 >> - Also these comments in section 7 and 8 are probably supposed to be >> removed: >> " =E2=80=9D >> =E2=80=A6? >>=20 >> - I found this in section 10.2.2: "@@@@@ others??=E2=80=9D. I guess = there is >> something missing? Also in this part, I don=E2=80=99t think SYN and = FIN should be >> set at the same time, no? And rather than providing the Kind and = Length of >> the TSopt, I would recommend to provide a pointer to the respective = RFC. >>=20 >>=20 >> And finally one/two/three more general question(s) at the end, that I >> probably should also have asked already on my review for = draft-ietf-ippm- >> metric-registry: >>=20 >> Is it actually intended that basically all the text in this RFC gets >> copied into the registry? And what is expected to be on the URL page = then? >> Wouldn=E2=80=99t it be necessary to also define a format for that = page in order to >> be of any use? >>=20 >>=20 >> Mirja >>=20 >>=20 >>=20 >>=20 >=20 From nobody Mon Sep 2 07:37:38 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 4E1A912013D; Mon, 2 Sep 2019 07:37:30 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156743505021.12881.6377913958569167494@ietfa.amsl.com> Date: Mon, 02 Sep 2019 07:37:30 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-yang-04.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Sep 2019 14:37:31 -0000 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 Two-way Active Measurement Protocol (STAMP) Data Model Authors : Greg Mirsky Xiao Min Wei S Luo Filename : draft-ietf-ippm-stamp-yang-04.txt Pages : 35 Date : 2019-09-02 Abstract: This document specifies the data model for implementations of Session-Sender and Session-Reflector for Simple Two-way Active Measurement Protocol (STAMP) mode using YANG. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-yang/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-stamp-yang-04 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-stamp-yang-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-stamp-yang-04 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Mon Sep 2 07:43:09 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 45E8D12013D for ; Mon, 2 Sep 2019 07:43:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 IlDDE507NYji for ; Mon, 2 Sep 2019 07:43:06 -0700 (PDT) Received: from mail-lj1-x22c.google.com (mail-lj1-x22c.google.com [IPv6:2a00:1450:4864:20::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C1ABF120110 for ; Mon, 2 Sep 2019 07:43:05 -0700 (PDT) Received: by mail-lj1-x22c.google.com with SMTP id z17so13142753ljz.0 for ; Mon, 02 Sep 2019 07:43:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=hRV9mMthwkf2dQfPXRxK3lvRS723q2pVwBXd6hOwmfc=; b=D8iUxK33LZgrU+1YJfAsuBdaPjhc7WN4LeX6jBACVH+Be58mkxw60rwnnMAoq6EMQO Dh3BOyJbBUe1eYyUD30v9QOizEs3wyL9l+F8eR6s6UjCmc58PUhqBRSV2F/CdaNTxFCF LMKs3HDEQz+IVr8npC7xR4SufGbOy/9op2Oskyryl2AI2OogMZEOrd1mSu5IufHZE5jO ltbG2qoCBA6F56RXkMwtp8fvFZc+70y/mHWpRY3ckjNYRAZvinLo8VDZ103gTU/cHO7u aBENYs0ywynWalrQVpa747kPNLyzDPEz5BENHD9zIF9GYOQoU+D0mU8353YsFI6hwml2 fY+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=hRV9mMthwkf2dQfPXRxK3lvRS723q2pVwBXd6hOwmfc=; b=PbFf5VcCKo4/Ce6MiucdUbUVjB2UOj2h7Z1WdtYdIc3hPvUHOjH1p3UG9uYm+VlKcQ 0Wb9XumCy1PaxXfZ/kOznQdGcR7Uo08XO5ryOP6LXZUv6jqHliU0KxGwBL3dfj0kXkD1 hc8JY0FFTVib/gD61BB3P76mVWSQNzs/z6T+wRZn9jXAsvkhkhrbbO5eyqEWCiue0cte fVstC2W9dSb/AgZ4RXeD+VFMjveDLbQaonpLx5y9rodDZvmY2TQmR8LyHPJ6IlhnRWMj iOLWOaP3nZR6DS2XYhimwzJA/m2bMNZ4RA+cMC/1AZnNfB1KsHzH1wi1j4yKlur1fB6n 0ByA== X-Gm-Message-State: APjAAAVKjGJPITcC996iFdyz98+mLUm2Hu7S3aA/I+Hap6GkTFEZDJVi 1uyCNNyAN7kL5toTua7U2xV4IO6NBqh2nzypYJi9h/mg X-Google-Smtp-Source: APXvYqw8KGJnzp7upyNKcaj6usAab6wdq2obxMyDInA9c6VOpA9w3VBngH+F/+qWHP+pf9UYEyHNxJVGK7/+vPXODow= X-Received: by 2002:a2e:8747:: with SMTP id q7mr4340648ljj.100.1567435383496; Mon, 02 Sep 2019 07:43:03 -0700 (PDT) MIME-Version: 1.0 References: <156743505021.12881.6377913958569167494@ietfa.amsl.com> In-Reply-To: <156743505021.12881.6377913958569167494@ietfa.amsl.com> From: Greg Mirsky Date: Mon, 2 Sep 2019 16:42:52 +0200 Message-ID: To: IETF IPPM WG Content-Type: multipart/alternative; boundary="0000000000003de40f059192fdc8" Archived-At: Subject: [ippm] Fwd: I-D Action: draft-ietf-ippm-stamp-yang-04.txt X-BeenThere: ippm@ietf.org 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: Mon, 02 Sep 2019 14:43:08 -0000 --0000000000003de40f059192fdc8 Content-Type: text/plain; charset="UTF-8" Dear All, based on our discussion, updated Reflector's range of UDP port numbers to include the User ports. Regards, Greg ---------- Forwarded message --------- From: Date: Mon, Sep 2, 2019 at 4:38 PM Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-yang-04.txt To: Cc: 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 Two-way Active Measurement Protocol (STAMP) Data Model Authors : Greg Mirsky Xiao Min Wei S Luo Filename : draft-ietf-ippm-stamp-yang-04.txt Pages : 35 Date : 2019-09-02 Abstract: This document specifies the data model for implementations of Session-Sender and Session-Reflector for Simple Two-way Active Measurement Protocol (STAMP) mode using YANG. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-yang/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-stamp-yang-04 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-stamp-yang-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-stamp-yang-04 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ _______________________________________________ ippm mailing list ippm@ietf.org https://www.ietf.org/mailman/listinfo/ippm --0000000000003de40f059192fdc8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
based on our discussion, updated Reflector&#= 39;s range of UDP port numbers to include the User ports.

Regards,
Greg

---------- Forwarded message ---------
Fro= m: <inter= net-drafts@ietf.org>
Date: Mon, Sep 2, 2019 at 4:38 PM
= Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-yang-04.txt
To: <<= a href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org>
Cc= : <ippm@ietf.org>

=

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

=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:= Simple Two-way Active Measurement Protocol (STAMP) Data Model
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: Greg= Mirsky
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Xiao Min
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Wei S Luo
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-iet= f-ippm-stamp-yang-04.txt
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:= 35
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 := 2019-09-02

Abstract:
=C2=A0 =C2=A0This document specifies the data model for implementations of<= br> =C2=A0 =C2=A0Session-Sender and Session-Reflector for Simple Two-way Active=
=C2=A0 =C2=A0Measurement Protocol (STAMP) mode using YANG.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-i= etf-ippm-stamp-yang/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ip= pm-stamp-yang-04
https://datatracker.ietf.org/doc/= html/draft-ietf-ippm-stamp-yang-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2= =3Ddraft-ietf-ippm-stamp-yang-04


Please note that it may take a couple of minutes from the time of submissio= n
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--0000000000003de40f059192fdc8-- From nobody Mon Sep 2 08:29:50 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 07FBC120024; Mon, 2 Sep 2019 08:29:48 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-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 ki0l3pGLzvSq; Mon, 2 Sep 2019 08:29:45 -0700 (PDT) Received: from smtp-sh.infomaniak.ch (smtp-sh.infomaniak.ch [128.65.195.4]) (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 F191F120020; Mon, 2 Sep 2019 08:29:44 -0700 (PDT) Received: from smtp7.infomaniak.ch (smtp7.infomaniak.ch [83.166.132.30]) by smtp-sh.infomaniak.ch (8.14.5/8.14.5) with ESMTP id x82FTKia030576 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 2 Sep 2019 17:29:20 +0200 Received: from [IPv6:2a00:79e0:42:206:d65:3820:3e29:d886] ([IPv6:2a00:79e0:42:206:d65:3820:3e29:d886]) (authenticated bits=0) by smtp7.infomaniak.ch (8.14.5/8.14.5) with ESMTP id x82FTIgk046784 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 2 Sep 2019 17:29:19 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: "Brian Trammell (IETF)" In-Reply-To: Date: Mon, 2 Sep 2019 17:29:18 +0200 Cc: "MORTON, ALFRED C (AL)" , Michelle Cotton , "draft-ietf-ippm-initial-registry.all@ietf.org" , IETF IPPM WG Content-Transfer-Encoding: quoted-printable Message-Id: <2292EEC5-9924-496C-82C2-85D896620807@trammell.ch> References: <40A0B71C-4857-46F0-9096-6EE289E7404B@kuehlewind.net> <4D7F4AD313D3FC43A053B309F97543CFA0AF30B4@njmtexg5.research.att.com> To: Mirja Kuehlewind X-Mailer: Apple Mail (2.3445.104.11) X-Antivirus: Dr.Web (R) for Unix mail servers drweb plugin ver.6.0.2.8 X-Antivirus-Code: 0x100000 Archived-At: Subject: Re: [ippm] AD review of draft-ietf-ippm-initial-registry-11 X-BeenThere: ippm@ietf.org 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: Mon, 02 Sep 2019 15:29:48 -0000 hi Mirja, IIRC there was also an intent to have initial-registry on the standards = track as it was initially intended (in part) as input to the LMAP WG = before they changed direction (and closed), and initial-registry was to = form the basis of the (standard) metrics LMAP would select among. Cheers, Brian > On 2 Sep 2019, at 13:29, Mirja Kuehlewind wrote: >=20 > Hi Al, >=20 > Thanks for the background info. Sorry, I should have explained myself = better. However, I don=E2=80=99t have a strong opinion on which status = we end up with but I would really like to make sure that the intended = status is well explained in the shepherd write-up in order to provided = the other ADs the needed background information during IESG review. >=20 > My think was that this document does actually not specify any new = metric and as the registry only requires =E2=80=9CExpert Review=E2=80=9D, = informational felt more natural for me. However, this is for the working = group to decide! >=20 > Mirja >=20 >=20 >=20 >> On 30. Aug 2019, at 22:20, MORTON, ALFRED C (AL) = wrote: >>=20 >> Hi Mirja, >>=20 >> Thanks for reviewing these two memos,=20 >> registry and initial contents. They added a lot >> of pages to your review load. >>=20 >> I don't recollect a list discussion on=20 >> whether PS or Info, but years ago we decided >> that all metric RFCs would go on the Standards Track, >> and devised ways to evaluate whether they should=20 >> advance based on testing and ultimately=20 >> revised text. So, it seemed natural to make these >> "tighter specifications of the original metrics" >> PS, and that's been the status since 00. >>=20 >> With this background, I'm interested to learn why >> Informational seems the right choice to you, >> and we should all think about the implications=20 >> of Info or PS for the metrics in this=20 >> draft-*-initial-registry. >>=20 >> regards, >> Al >>=20 >>> -----Original Message----- >>> From: Mirja Kuehlewind [mailto:ietf@kuehlewind.net] >>> Sent: Tuesday, August 27, 2019 11:47 AM >>> To: draft-ietf-ippm-initial-registry.all@ietf.org >>> Cc: IETF IPPM WG ; Michelle Cotton >>> >>> Subject: AD review of draft-ietf-ippm-initial-registry-11 >>>=20 >>> Hi authors, hi all, >>>=20 >>> We need to discuss at least one bigger question on the intended = status >>> before we can move ahead. However, as you can seen I have more >>> questions/comments below. >>>=20 >>> The bigger status question first: >>> The intended status is PS. The shepherd write-up does not provide = any >>> additional information about why this status is appropriate. I would >>> assume that informational is actually more appropriate. I don=E2=80=99= t recall out >>> of my head if/when this was discussed and I thought I rather ask = than >>> searching the list archive and minutes=E2=80=A6 Is this the right = status and why? >>> And if so, please reflect in the write-up! >>>=20 >>>=20 >>> And then a couple more (hopefully) quicker comments/questions: >>>=20 >>> - I know this was already reviewed by IANA (Michelle is also = cc=E2=80=99ed), >>> however, as far as I can see all Administrative Information (Status, >>> Requestor, Revision, and Revision Date) and maybe even the ID = don=E2=80=99t need >>> to be part of the template because IANA will anyway assign them = based on >>> the instructions given in draft-ietf-ippm-metric-registry. Or did = IANA >>> explicitly request to also include these parts? >>>=20 >>> - Then for the Change Controller that should usually be the IESG = rather >>> than the IETF. Did IANA comment on that? >>>=20 >>> - And one minor point: I guess the secY part of the name could = already be >>> filled out, no? However, I should probably have asked that on review = of >>> draft-ietf-ippm-metric-registry already but I was actually wondering = if >>> the decision to include the RFC number and section in the metric = name is >>> appropriate. Can you maybe lay out what the reasons for this are = (and >>> maybe also explain in the draft as his might come up again during = IESG >>> review otherwise)=E2=80=A6? >>>=20 >>>=20 >>> Then then on references again: >>>=20 >>> - This draft references two obsoleted RFCs (RFC2679 and RFC2680). I = assume >>> this is an oversight and the references need to be updated? >>>=20 >>> - Also given you rely heavily on [Trammell-14], I think this needs = to be a >>> normative reference (and maybe [Strowes] as well?). The more stable >>> pointer for [Trammell-14] is actually here: >>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps- >>> 3A__link.springer.com_chapter_10.1007_978-2D3-2D642-2D54999-2D1- >>> = 5F2&d=3DDwIFaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3Dh= wJZg- >>> = IdxQ9507aw2mjEKKOSWIEVnc8nwr7B_QiOyCU&s=3DHSEAeC_uI-vofX5ZWPSCH-R4Ph8Gu618= - >>> YtZJ4pTAgE&e=3D >>> But to be honest the split between normative and informational = isn=E2=80=99t >>> actually very clear to me here=E2=80=A6? >>>=20 >>>=20 >>> And on the shepherd write-up: >>>=20 >>> It=E2=80=99s indicated that not all authors have replied to the IPR = question. This >>> need to be checked and respectively reflected in the shepherd = write-up >>> before we can move ahead! >>>=20 >>>=20 >>> And some smaller technical questions/nits: >>>=20 >>> - Is it correct that T0 in section 4 is defined in both subsections = 4.3.5 >>> and 4.4.2? >>>=20 >>> - Why is an URI given (only) in section 6.1.3? >>> Also section 7.1.3 and 8.1.3.: http:\\www.iana.org\ ... -> I >>> think this should be: = https://urldefense.proofpoint.com/v2/url?u=3Dhttp- >>> 3A__www.iana.org_&d=3DDwIFaQ&c=3DLFYZ- >>> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DhwJZg- >>> IdxQ9507aw2mjEKKOSWIEVnc8nwr7B_QiOyCU&s=3D9PuQd07oTFlEt8tWIDYz4c- >>> qFUd4zpyT_7QeckyeAsc&e=3D/ >>>=20 >>>=20 >>> Some more editorial comments/nits: >>>=20 >>> - I find it actually unnecessary or rather confusing that most (not = all) >>> sections start with a sentence/paragraph explaining what the section = is >>> about (e.g. "Additional (Informational) details for this entry=E2=80=9D= ). I would >>> think this is sufficiently explained in = draft-ietf-ippm-metric-registry >>> and does not need to be repeated here (in this already long = document). >>> Also note that section 8.6 inconsistently doesn=E2=80=99t have any = content while >>> 10.6. says =E2=80=9CNone.=E2=80=9D. >>>=20 >>> - Also these comments in section 7 and 8 are probably supposed to be >>> removed: >>> " =E2=80=9D >>> =E2=80=A6? >>>=20 >>> - I found this in section 10.2.2: "@@@@@ others??=E2=80=9D. I guess = there is >>> something missing? Also in this part, I don=E2=80=99t think SYN and = FIN should be >>> set at the same time, no? And rather than providing the Kind and = Length of >>> the TSopt, I would recommend to provide a pointer to the respective = RFC. >>>=20 >>>=20 >>> And finally one/two/three more general question(s) at the end, that = I >>> probably should also have asked already on my review for = draft-ietf-ippm- >>> metric-registry: >>>=20 >>> Is it actually intended that basically all the text in this RFC gets >>> copied into the registry? And what is expected to be on the URL page = then? >>> Wouldn=E2=80=99t it be necessary to also define a format for that = page in order to >>> be of any use? >>>=20 >>>=20 >>> Mirja >>>=20 >>>=20 >>>=20 >>>=20 >>=20 >=20 > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm >=20 From nobody Mon Sep 2 23:35:18 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 84F3A120806 for ; Mon, 2 Sep 2019 23:35:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.197 X-Spam-Level: X-Spam-Status: No, score=-4.197 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-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 uyiMtQo-V3hN for ; 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=CxsJyvcQ3xpSsIes2jPg1TDrk9vHQ0hCyCFbWb4q4U4=; b=Wgx5QXpC9irEEhNLE+zzjmRIoF5gtJUuKYvOlD/FZhWdWBipiq5oSo2jCT40gfZ8t0 +W2dtrreoVSEVLLb/9ONMShkBzNtbz4Th5hTaZxXiHl2RKP4FSOZUXS1sYcV3sz7PCrI 89cHo2RA1Po73XC1/yI6b5BfFWYgHhna6EQhweeEQFIASJe3eH2IRlBpnKp6f2u23g4W +b3tAyLg6AGq99576bhYsVfOKHYy2QW2hZCzKE0dKoZCsXVlmwP7rVxCSOPTt0DSkjCm qv6Jce+ZmHm5JpCQk2y+XjVFHKp0pydQ2Pw86KG+QC/kPrKUMWzmR/bOeYyYMU3pwaIf 7gag== X-Gm-Message-State: APjAAAW+5qFRnyxbQO+NJOJTdKyOQ5yVPgKFx2ucgweGvjUzmr+jHk7I vgE+PG+FMVX/O9Uw5XTW1vj4S29FnRRGZKQec1A= X-Google-Smtp-Source: APXvYqz7hTZ4JeX1WdIVwUCaW3D6Aj/KcfWjraLPtOMbL+wuE4yQ6Kjx7zie5re2p3vV5jD1tH5BAZC9XM7n3xDjzuE= X-Received: by 2002:ac5:c5ba:: with SMTP id f26mr6881739vkl.32.1567548351215; Tue, 03 Sep 2019 15:05:51 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Anoop Ghanwani Date: Tue, 3 Sep 2019 15:05:33 -0700 Message-ID: To: "Frank Brockners (fbrockne)" Cc: "vijayr@arista.com" , "draft-ietf-ippm-ioam-data@ietf.org" , IETF IPPM WG , Hugh Holbrook , "OU, Heidi" , Surendra Anubolu , "bew.stds@gmail.com" Content-Type: multipart/alternative; boundary="000000000000a480660591ad4a7b" Archived-At: Subject: Re: [ippm] Review on draft-ietf-ippm-ioam-data-06 X-BeenThere: ippm@ietf.org 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: Tue, 03 Sep 2019 22:05:55 -0000 --000000000000a480660591ad4a7b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks Frank, this is helpful. It appears the issue is still unresolved. Anoop On Mon, Sep 2, 2019 at 1:20 AM Frank Brockners (fbrockne) < fbrockne@cisco.com> wrote: > Hi Anoop, > > > > WRT/ the use of GRE encap: There was an earlier discussion among authors > and interested parties which I=E2=80=99m attaching here. > > This discussion is also captured in the open issue #128: > https://github.com/inband-oam/ietf/issues/128 > > > > Frank > > > > *From:* Anoop Ghanwani > *Sent:* Samstag, 24. August 2019 00:02 > *To:* vijayr@arista.com > *Cc:* Frank Brockners (fbrockne) ; > draft-ietf-ippm-ioam-data@ietf.org; IETF IPPM WG ; Hugh > Holbrook ; OU, Heidi ; > Surendra Anubolu > *Subject:* Re: [ippm] Review on draft-ietf-ippm-ioam-data-06 > > > > Hi Frank, > > > > As with Vijay, I am also interested in understanding the use of GRE for > in-sequencing OAM. Do we end up needing an Ethertype for TCP/UDP? > > > > Thanks, > > Anoop > > > > On Thu, Aug 22, 2019 at 10:06 AM Vijay Rangarajan 40arista.com@dmarc.ietf.org> wrote: > > Hi Frank: > > Thanks, I knew I was missing something. > > So basically what you are saying is - let's say we have a UDP packet, we > are just going to stick in the GRE header and IOAM Header and Metadata > in-between the original IP and UDP headers? > > > > So, the next protocol in the IOAM Header should indicate the L4 protocol = - > i.e UDP/TCP? > > Looking at https://datatracker.ietf.org/doc/draft-weis-ippm-ioam-eth/, it > actually defines the "Next protocol" in the IOAM header to be an ethertyp= e > value? > > > > Thanks, > > Vijay > > > > > > On Thu, Aug 22, 2019 at 6:22 PM Frank Brockners (fbrockne) < > fbrockne@cisco.com> wrote: > > Hi Vijay, > > > > note that you don=E2=80=99t necessarily need to =E2=80=9Ctunnel=E2=80=9D = =E2=80=93 you can just use the > GRE header to sequence-in IOAM. > > > > Cheers, Frank > > > > *From:* Vijay Rangarajan > *Sent:* Donnerstag, 22. August 2019 05:31 > *To:* Carlos Pignataro (cpignata) > > *Cc:* Jai Kumar ; > draft-ietf-ippm-ioam-data@ietf.org; IETF IPPM WG ; Frank > Brockners (fbrockne) ; Hugh Holbrook < > holbrook@arista.com>; Anoop Ghanwani ; OU, Heidi > >; Surendra Anubolu = < > surendra.anubolu@broadcom.com>; John Lemon > *Subject:* Re: [ippm] Review on draft-ietf-ippm-ioam-data-06 > > > > Thanks Carlos, for pointing me to the draft. > > > > Based on my understanding of the two drafts I have the following question= s > and concerns: > > 1. If I understand correctly, to deploy inband telemetry, we would > need to construct GRE tunnels coinciding with the IOAM domain? > 2. GRE typically requires configuration to provision the tunnels. > Provisioning and managing these tunnels and keeping these updated as t= he > network grows/shrinks could be a significant overhead. > 3. In order to get the benefit of telemetry, we are imposing a change > in forwarding protocol/topology and configuration - which, I feel is n= ot > desirable. For example, a customer might have basic L3 routing enabled= and > the expectation would be for inband telemetry to work seamlessly, with= out > having to revamp the network with GRE tunnels and such. This could be = a > significant barrier to deployment. > 4. If sampling is used to select packets for performing IOAM encap, is > the expectation that only sampled IOAM packets go through GRE encap? O= r all > data packets? > 5. Due to network nodes inserting the IOAM data, the inner L3/L4 > headers keep getting pushed deeper. I would imagine this gets challeng= ing > for ASICs to access these fields for hashing/load balancing. > 6. Assuming only a subset of packets in a flow are subject to IOAM > (based on sampling), how do we ensure these packets take the same netw= ork > path as the rest of the packets in the flow? > > Thanks, > > Vijay > > > > > > On Wed, Aug 21, 2019 at 5:04 PM Carlos Pignataro (cpignata) < > cpignata@cisco.com> wrote: > > Hello, Vijay, > > > > Please see https://datatracker.ietf.org/doc/draft-weis-ippm-ioam-eth/, > and the document this replaces. > > > > Thanks! > > Thumb typed by Carlos Pignataro. > > Excuze typofraphicak errows > > > 2019/08/21 6:35=E3=80=81Vijay Rangarajan =E3=81=AE=E3= =83=A1=E3=83=BC=E3=83=AB: > > Hello all: > > Apologise if this has been previously discussed. > > In reading "draft-ietf-ippm-ioam-data-06", I don't see mention of GRE > encap. The draft, in fact in Sec 3, says the following - "The in-situ OAM > data field can be transported by a variety of transport protocols, > including NSH, Segment Routing, Geneve, IPv6, or IPv4. Specification > details for these different transport protocols are outside the scope of > this document." > > > > Is there another document, or a description somewhere, that talks about > how IOAM is proposed to be carried in GRE? what would be the GRE payload, > the GRE protocol type etc? > > > > Thanks, > > Vijay > > > > > > On Wed, Aug 21, 2019 at 7:52 AM Jai Kumar wrote: > > Hello Frank, > > > > This is in context of our conversation at IETF105. My goal is to provide > input and improve current IOAM data draft with the learnings we had with > IFA deployment. > > This feedback is based on various customer interactions and concerns > raised by them wrt IOAM. Each feedback is a longer topic and I am startin= g > this thread as a summary email. This is just highlighting the issues and > not yet proposing any solution. > > > > > > Feedback 1: > > Section 4.2.1 Pre-allocated and Incremental Trace Options > > Pre-allocated and incremental trace option is 8Bytes long. This can be > easily reduced to 4Bytes. > > There is a feedback that pre-allocated option is really not needed and > either be removed or made optional. > > Given that deployments are sensitive to the IOAM overhead (specially in 5= G > deployments), it=E2=80=99s a 50% fixed overhead savings on a per packet b= asis. > > > > > > Feedback 2: > Section 4.1 IOAM Namespaces > > Namespaces should be treated as templates (similar to IPFIX template > record formats). This is more flexible way of enumerating data. 64K > namespace id is a very large namespace and can be reduced to 64 IANA > specified name spaces. Separate private name space can be allowed instead > of interleaving of opaque data in the IANA allocated name space as > suggested in the current draft =E2=80=9Copaque state snapshot=E2=80=9D. > > https://tools.ietf.org/html/rfc7011#section-3.4 > > > > Feedback 3: > > Section 4.2.1 Pre-allocated and Incremental Trace Options > > IOAM-Trace-Type: A 24-bit identifier which specifies which data > > types are used in this node data list. > > This is the most contentious of all. In the current proposal, as new data > fields are added, there is a corresponding trace type bit need in the > header. This essentially means that all possible data fields need to be > enumerated. Given that we there are 64K names spaces allowed, I don=E2=80= =99t see > how we can fit all possible data fields in this 24bit vector. I know ther= e > was a suggestion of keeping last bit as an extension bit but it is still > scalable and/or easy to implement in hardware. Besides this the data fiel= ds > are not annotated/encoded with the data type, something like in IPFIX > https://tools.ietf.org/html/rfc7011#section-6.1 > > > > Feedback 4: > > There is no version field in the data header and this will make > interoperability challenging. Standard will evolve and headers bit > definition and/or trace type will change and without version field HW wil= l > not be able to correctly handle the IOAM data headers. > > > > Feedback 5: > > Handling of TCP/UDP traffic using GRE encap is not acceptable. Here are > some of the issues I can think of > > - GRE encaped IOAM packets will traverse a different network path then > the original packet > - Not all packets can be GRE encaped to avoid the previous problem, > due to wastage of network bandwidth (typically sampled traffic is used= for > IOAM). What about native GRE traffic, will it get further encaped in > another GRE tunnel and so forth. > - IP header protocol will point to GRE IP proto and IOAM ethertype > (pending allocation by IEEE) need to be read from the GRE header to de= tect > an IOAM packet. This means parsing performance penalty for all regular= GRE > (non IOAM) traffic. > > > > Thanks, > > -Jai > > > > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm > > --000000000000a480660591ad4a7b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks Frank, this is helpful.=C2=A0 It appears the issue = is still unresolved.

Anoop

On Mon, Sep 2, 2019 at 1= :20 AM Frank Brockners (fbrockne) <fbrockne@cisco.com> wrote:

Hi Anoop,

=C2=A0

WRT/ the use of GRE encap: There was an earlier disc= ussion among authors and interested parties which I=E2=80=99m attaching her= e.

This discussion is also captured in the open issue #= 128: https://github.com/inband-oam/ietf/issues/128

=C2=A0

Frank

=C2=A0

From: Anoop Ghanwani <anoop@alumni.duke.edu>
Sent: Samstag, 24. August 2019 00:02
To: vijayr@ar= ista.com
Cc: Frank Brockners (fbrockne) <fbrockne@cisco.com>; draft-ietf-ippm-ioam-data@i= etf.org; IETF IPPM WG <ippm@ietf.org>; Hugh Holbrook <holbrook@arista.com>; OU, Heidi <heidi.ou@alibaba= -inc.com>; Surendra Anubolu <surendra.anubolu@broadcom.com>
Subject: Re: [ippm] Review on draft-ietf-ippm-ioam-data-06=

=C2=A0

Hi Frank,

=C2=A0

As with Vijay, I am also interested in understanding= the use of GRE for in-sequencing OAM.=C2=A0 Do we end up needing an Ethert= ype for TCP/UDP?

=C2=A0

Thanks,

Anoop

=C2=A0

On Thu, Aug 22, 2019 at 10:06 AM Vijay Rangarajan &l= t;vijayr=3D40arista.com@dmarc.ietf.org> wrote:

Hi Frank:

Thanks, I knew I was missing something.

So basically what you are saying is - let's say = we have a UDP packet, we are just going to stick in the GRE header and IOAM= Header and Metadata in-between the original IP and UDP headers?<= /u>

=C2=A0

So, the next protocol in the IOAM Header should indi= cate the L4 protocol - i.e UDP/TCP?=C2=A0

Looking at=C2=A0https://datatracker.ie= tf.org/doc/draft-weis-ippm-ioam-eth/, it actually defines the "Nex= t protocol" in the IOAM header to be an ethertype value?

=C2=A0

Thanks,

Vijay

=C2=A0

=C2=A0

On Thu, Aug 22, 2019 at 6:22 PM Frank Brockners (fbr= ockne) <fbrockne= @cisco.com> wrote:

Hi Vijay,

=C2=A0

note that you don=E2=80=99t necessarily need to =E2= =80=9Ctunnel=E2=80=9D =E2=80=93 you can just use the GRE header to sequence= -in IOAM.

=C2=A0

Cheers, Frank

=C2=A0

From: Vijay Rangarajan <vijayr@arista.com>
Sent: Donnerstag, 22. August 2019 05:31
To: Carlos Pignataro (cpignata) <cpignata@cisco.com>
Cc: Jai Kumar <jai.kumar@broadcom.com>; dra= ft-ietf-ippm-ioam-data@ietf.org; IETF IPPM WG <ippm@ietf.org>; Frank Brockners (fbroc= kne) <fbrockne@c= isco.com>; Hugh Holbrook <holbrook@arista.com>; Anoop Ghanwani <Anoop.Ghanwani@dell.com>; OU, Hei= di <heidi.= ou@alibaba-inc..com>; Surendra Anubolu <surendra.anubolu@broadcom.com>; John Lemon <john.lemon@broadcom.c= om>
Subject: Re: [ippm] Review on draft-ietf-ippm-ioam-data-06=

=C2=A0

Thanks Carlos, for pointing me to the draft.<= u>

=C2=A0

Based on my understanding of the two drafts I have t= he following questions and concerns:

  1. If I understand correctly, to deploy inband telemetry, we would need to con= struct GRE tunnels coinciding with the IOAM domain?
  2. GRE typically requires configuration to provision the tunnels. Provisioning= and managing these tunnels and keeping these updated as the network grows/= shrinks could be a significant overhead.
  3. In order to get the benefit of telemetry, we are imposing a change in forwa= rding protocol/topology and configuration - which, I feel is not desirable.= For=C2=A0example, a customer might have basic L3 routing enabled and the e= xpectation would be for inband telemetry to work seamlessly, without having to revamp the network with GRE tunnels = and such. This could be a significant barrier to deployment.<= /li>
  4. If sampling is used to select packets for performing IOAM encap, is the exp= ectation that only sampled IOAM packets go through GRE encap? Or all data p= ackets?
  5. Due to network nodes inserting the IOAM data, the inner L3/L4 headers keep = getting pushed deeper. I would imagine this gets challenging for ASICs to a= ccess these fields for hashing/load balancing.
  6. Assuming only a subset of packets in a flow are subject to IOAM (based on s= ampling), how do we ensure these packets take the same network path as the = rest of the packets in the flow?

Thanks,

Vijay

=C2=A0

=C2=A0

On Wed, Aug 21, 2019 at 5:04 PM Carlos Pignataro (cp= ignata) <cpignat= a@cisco.com> wrote:

Hello, Vijay,

=C2=A0

Please see=C2=A0https://datatracker.ie= tf.org/doc/draft-weis-ippm-ioam-eth/, and the document this replaces.=C2=A0

=C2=A0

Thanks!

Thumb typed by Carlos Pignataro.

Excuze typofraphicak errows=


2019/08/21 6:35=E3=80=81<= /span>Vijay Rangarajan <vijayr@arista.com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:

Hello all:

Apologise if this has been previously discussed.<= /u>

In reading "draft-ietf-ippm-ioam-data-06",= I don't see mention of GRE encap. The draft, in fact in Sec 3, says th= e following - "The in-situ OAM data field can be transported by a variety of transport protocols, including NSH, Segment Routing, Geneve, = IPv6, or IPv4.=C2=A0 Specification details for these different transport pr= otocols are outside the scope of this document."

=C2=A0

Is there another document, or a description somewher= e, that talks about how IOAM is proposed to be carried in GRE? what would b= e the GRE payload, the GRE protocol type etc?

=C2=A0

Thanks,

Vijay

=C2=A0

=C2=A0

On Wed, Aug 21, 2019 at 7:52 AM Jai Kumar <jai.kumar@broadcom.co= m> wrote:

Hello Frank,

=C2=A0

This is in context of our conversation at IETF105. M= y goal is to provide input and improve current IOAM data draft with the lea= rnings we had with IFA deployment.

This feedback is based on various customer interacti= ons and concerns raised by them wrt IOAM. Each feedback is a longer topic a= nd I am starting this thread as a summary email. This is just highlighting the issues and not yet proposing any solution.

=C2=A0

=C2=A0

Feedback 1:

Section 4.2.1 Pre-allocated and Incremental Trace Options

Pre-allocated and incremental trace option is 8Bytes= long. This can be easily reduced to 4Bytes.

There is a feedback that pre-allocated option is rea= lly not needed and either be removed or made optional.

Given that deployments are sensitive to the IOAM ove= rhead (specially in 5G deployments), it=E2=80=99s a 50% fixed overhead savi= ngs on a per packet basis.

=C2=A0

=C2=A0

Feedback 2:

Section 4.1 = IOAM Namespaces

Namespaces should be treated as templates (similar t= o IPFIX template record formats). This is more flexible way of enumerating = data. 64K namespace id is a very large namespace and can be reduced to 64 IANA specified name spaces. Separate private name spa= ce can be allowed instead of interleaving of opaque data in the IANA alloca= ted name space as suggested in the current draft =E2=80=9Copaque state snap= shot=E2=80=9D.

https://tools.ietf.org/html/rfc7011#section-3.4

=C2=A0

Feedback 3:

Section 4.2.1 Pre-allocated and Incremental Trace Options

IOAM-Trace-Type:=C2=A0 A= 24-bit identifier which specifies which data

=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 types are used in this node data list.

This is the most contentious of all. In the current = proposal, as new data fields are added, there is a corresponding trace type= bit need in the header. This essentially means that all possible data fields need to be enumerated. Given that we there are 64= K names spaces allowed, I don=E2=80=99t see how we can fit all possible dat= a fields in this 24bit vector. I know there was a suggestion of keeping las= t bit as an extension bit but it is still scalable and/or easy to implement in hardware. Besides this the data field= s are not annotated/encoded with the data type, something like in IPFIX https://tools.ietf.org/html/rfc7011#section-6.1

=C2=A0

Feedback 4:

There is no version field in the data header and thi= s will make interoperability challenging. Standard will evolve and headers = bit definition and/or trace type will change and without version field HW will not be able to correctly handle the IOAM data header= s.

=C2=A0

Feedback 5:

Handling of TCP/UDP traffic using GRE encap is not a= cceptable. Here are some of the issues I can think of

  • GRE encaped IOAM packets will traverse a different network path then the or= iginal packet
  • Not all packets can be GRE encaped to avoid the previous problem, due to wa= stage of network bandwidth (typically sampled traffic is used for IOAM). Wh= at about native GRE traffic, will it get further encaped in another GRE tun= nel and so forth.
  • IP header protocol will point to GRE IP proto and IOAM ethertype (pending a= llocation by IEEE) need to be read from the GRE header to detect an IOAM pa= cket. This means parsing performance penalty for all regular GRE (non IOAM)= traffic.

=C2=A0

Thanks,

-Jai

=C2=A0

_______________________________________________
ippm mailing list
ippm@ietf.org
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--000000000000a480660591ad4a7b-- From nobody Tue Sep 3 18:01:08 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 165ED12009E; Tue, 3 Sep 2019 18:01:00 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Dale Worley via Datatracker To: Cc: draft-ietf-ippm-stamp.all@ietf.org, ietf@ietf.org, ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Dale Worley Message-ID: <156755886001.20663.2914752086303599527@ietfa.amsl.com> Date: Tue, 03 Sep 2019 18:01:00 -0700 Archived-At: Subject: [ippm] Genart last call review of draft-ietf-ippm-stamp-07 X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 01:01:00 -0000 Reviewer: Dale Worley Review result: Ready with Issues Network Working Group G. Mirsky Internet-Draft ZTE Corp. Intended status: Standards Track G. Jun Expires: February 13, 2020 ZTE Corporation H. Nydell Accedian Networks R. Foote Nokia August 12, 2019 Simple Two-way Active Measurement Protocol draft-ietf-ippm-stamp-07 Abstract This document describes a Simple Two-way Active Measurement Protocol which enables the measurement of both one-way and round-trip performance metrics like delay, delay variation, and packet loss. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on February 13, 2020. Copyright Notice Copyright (c) 2019 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must Mirsky, et al. Expires February 13, 2020 [Page 1] Internet-Draft STAMP August 2019 include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions used in this document . . . . . . . . . . . . . . 3 2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2.2. Requirements Language . . . . . . . . . . . . . . . . . . 3 3. Softwarization of Performance Measurement . . . . . . . . . . 3 4. Theory of Operation . . . . . . . . . . . . . . . . . . . . . 4 4.1. Session-Sender Behavior and Packet Format . . . . . . . . 5 4.1.1. Session-Sender Packet Format in Unauthenticated Mode 5 4.1.2. Session-Sender Packet Format in Authenticated Mode . 6 4.2. Session-Reflector Behavior and Packet Format . . . . . . 7 4.2.1. Session-Reflector Packet Format in Unauthenticated Mode . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2.2. Session-Reflector Packet Format in Authenticated Mode 9 4.3. Integrity and Confidentiality Protection in STAMP . . . . 10 4.4. Interoperability with TWAMP Light . . . . . . . . . . . . 11 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11 6. Security Considerations . . . . . . . . . . . . . . . . . . . 12 7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 12 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.1. Normative References . . . . . . . . . . . . . . . . . . 12 8.2. Informative References . . . . . . . . . . . . . . . . . 14 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14 1. Introduction Development and deployment of Two-Way Active Measurement Protocol (TWAMP) [RFC5357] and its extensions, e.g., [RFC6038] that defined features such as Reflect Octets and Symmetrical Size for TWAMP provided invaluable experience. Several independent implementations exist, have been deployed and provide important operational performance measurements. At the same time, there has been noticeable interest in using a more straightforward mechanism for active performance monitoring that can provide deterministic behavior and inherit separation of control (vendor-specific configuration or orchestration) and test functions. One of such is Performance Measurement from IP Edge to Customer Equipment using TWAMP Light from Broadband Forum [BBF.TR-390] used as the reference TWAMP Light that, according to [RFC8545], includes sub-set of TWAMP-Test functions in combination with other applications that provide, for example, control and security. This document defines an active performance measurement test protocol, Simple Two-way Active Measurement Protocol (STAMP), that enables measurement of both one-way and round-trip Mirsky, et al. Expires February 13, 2020 [Page 2] Internet-Draft STAMP August 2019 performance metrics like delay, delay variation, and packet loss. Some TWAMP extensions, e.g., [RFC7750] are supported by the extensions to STAMP base specification in [I-D.ietf-ippm-stamp-option-tlv]. 2. Conventions used in this document 2.1. Terminology AES Advanced Encryption Standard CBC Cipher Block Chaining ECB Electronic Cookbook KEK Key-encryption Key STAMP - Simple Two-way Active Measurement Protocol NTP - Network Time Protocol PTP - Precision Time Protocol HMAC Hashed Message Authentication Code OWAMP One-Way Active Measurement Protocol TWAMP Two-Way Active Measurement Protocol MBZ May be Zero 2.2. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. 3. Softwarization of Performance Measurement Figure 1 presents the Simple Two-way Active Measurement Protocol (STAMP) Session-Sender, and Session-Reflector with a measurement session. The configuration and management of the STAMP Session- Sender, Session-Reflector, and management of the STAMP sessions can be achieved through various means. Command Line Interface, OSS/BSS (operations support system/business support system as a combination of two systems used to support a range of telecommunication services) Mirsky, et al. Expires February 13, 2020 [Page 3] Internet-Draft STAMP August 2019 using SNMP or controllers in Software-Defined Networking using Netconf/YANG are but a few examples. o----------------------------------------------------------o | Configuration and | | Management | o----------------------------------------------------------o || || || || || || +----------------------+ +-------------------------+ | STAMP Session-Sender | <--- STAMP---> | STAMP Session-Reflector | +----------------------+ +-------------------------+ Figure 1: STAMP Reference Model 4. Theory of Operation STAMP Session-Sender transmits test packets over UDP transport toward STAMP Session-Reflector. A STAMP Session-Sender MUST use UDP port 862 (TWAMP-Test Receiver Port) as the default destination UDP port number. A STAMP implementation of Session-Sender MUST be able to use UDP port numbers from User, a.k.a. Registered, Ports and Dynamic, a.k.a. Private or Ephemeral, Ports ranges defined in [RFC6335]. Before using numbers from the User Ports range, the possible impact on the network MUST be carefully studied and agreed by all users of the network. STAMP Session-Reflector receives Session-Sender's packet and acts according to the configuration and optional control information communicated in the Session-Sender's test packet. An implementation of STAMP Session-Reflector by default MUST use receive STAMP test packets on UDP port 862. An implementation of Session-Reflector that supports this specification MUST be able to define the port number to receive STAMP test packets from User Ports and Dynamic Ports ranges that are defined in [RFC6335]. STAMP defines two different test packet formats, one for packets transmitted by the STAMP-Session- Sender and one for packets transmitted by the STAMP-Session- Reflector. STAMP supports two modes: unauthenticated and authenticated. Unauthenticated STAMP test packets, defined in Section 4.1.1 and Section 4.2.1, ensure interworking between STAMP and TWAMP Light as described in Section 4.4 packet formats. Mirsky, et al. Expires February 13, 2020 [Page 4] Internet-Draft STAMP August 2019 By default, STAMP uses symmetrical packets, i.e., size of the packet transmitted by Session-Reflector equals the size of the packet received by the Session-Reflector. 4.1. Session-Sender Behavior and Packet Format Because STAMP supports symmetrical test packets, STAMP Session-Sender packet has a minimum size of 44 octets in unauthenticated mode, see Figure 2, and 112 octets in the authenticated mode, see Figure 4. 4.1.1. Session-Sender Packet Format in Unauthenticated Mode STAMP Session-Sender packet format in unauthenticated mode: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence Number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Error Estimate | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | | | | | MBZ (30 octets) | | | | | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 2: STAMP Session-Sender test packet format in unauthenticated mode where fields are defined as the following: o Sequence Number is four octets long field. For each new session its value starts at zero and is incremented with each transmitted packet. o Timestamp is eight octets long field. STAMP node MUST support Network Time Protocol (NTP) version 4 64-bit timestamp format [RFC5905], the format used in [RFC5357]. STAMP node MAY support IEEE 1588v2 Precision Time Protocol truncated 64-bit timestamp format [IEEE.1588.2008], the format used in [RFC8186]. Mirsky, et al. Expires February 13, 2020 [Page 5] Internet-Draft STAMP August 2019 o Error Estimate is two octets long field with format displayed in Figure 3 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |S|Z| Scale | Multiplier | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 3: Error Estimate Format where S, Scale, and Multiplier fields are interpreted as they have been defined in section 4.1.2 [RFC4656]; and Z field - as has been defined in section 2.3 [RFC8186]: * 0 - NTP 64 bit format of a timestamp; * 1 - PTPv2 truncated format of a timestamp. The STAMP Session-Sender and Session-Reflector MAY use, not use, or set value of the Z field in accordance with the timestamp format in use. This optional field is to enhance operations, but local configuration or defaults could be used in its place. o May-be-Zero (MBZ) field in the session-sender unauthenticated packet is 30 octets long. It MAY be all zeroed on the transmission and MUST be ignored on receipt. 4.1.2. Session-Sender Packet Format in Authenticated Mode STAMP Session-Sender packet format in authenticated mode: Mirsky, et al. Expires February 13, 2020 [Page 6] Internet-Draft STAMP August 2019 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence Number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | MBZ (12 octets) | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Error Estimate | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ~ ~ | MBZ (70 octets) | ~ ~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | HMAC (16 octets) | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 4: STAMP Session-Sender test packet format in authenticated mode The field definitions are the same as the unauthenticated mode, listed in Section 4.1.1. Also, MBZ fields are used to align the packet on 16 octets boundary. The value of the field MAY be zeroed on transmission and MUST be ignored on receipt. Also, the packet includes a key-hashed message authentication code (HMAC) ([RFC2104]) hash at the end of the PDU. The detailed use of the HMAC field is described in Section 4.3. 4.2. Session-Reflector Behavior and Packet Format The Session-Reflector receives the STAMP test packet, verifies it, prepares and transmits the reflected test packet. Two modes of STAMP Session-Reflector characterize the expected behavior and, consequently, performance metrics that can be measured: o Stateless - STAMP Session-Reflector does not maintain test state and will reflect the received sequence number without modification. As a result, only round-trip packet loss can be calculated while the reflector is operating in stateless mode. Mirsky, et al. Expires February 13, 2020 [Page 7] Internet-Draft STAMP August 2019 o Stateful - STAMP Session-Reflector maintains test state thus enabling the ability to determine forward loss, gaps recognized in the received sequence number. As a result, both near-end (forward) and far-end (backward) packet loss can be computed. That implies that the STAMP Session-Reflector MUST keep a state for each accepted STAMP-test session, uniquely identifying STAMP- test packets to one such session instance, and enabling adding a sequence number in the test reply that is individually incremented on a per-session basis. 4.2.1. Session-Reflector Packet Format in Unauthenticated Mode For unauthenticated mode: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence Number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Error Estimate | MBZ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Receive Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Session-Sender Sequence Number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Session-Sender Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Session-Sender Error Estimate | MBZ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Ses-Sender TTL | MBZ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 5: STAMP Session-Reflector test packet format in unauthenticated mode where fields are defined as the following: o Sequence Number is four octets long field. The value of the Sequence Number field is set according to the mode of the STAMP Session-Reflector: * in the stateless mode the Session-Reflector copies the value from the received STAMP test packet's Sequence Number field; Mirsky, et al. Expires February 13, 2020 [Page 8] Internet-Draft STAMP August 2019 * in the stateful mode the Session-Reflector counts the received STAMP test packets in each test session and uses that counter to set the value of the Sequence Number field. o Timestamp and Receiver Timestamp fields are each eight octets long. The format of these fields, NTP or PTPv2, indicated by the Z flag of the Error Estimate field as described in Section 4.1. o Error Estimate has the same size and interpretation as described in Section 4.1. o Session-Sender Sequence Number, Session-Sender Timestamp, and Session-Sender Error Estimate are copies of the corresponding fields in the STAMP test packet sent by the Session-Sender. o Session-Sender TTL is one octet long field, and its value is the copy of the TTL field in IPv4 (or Hop Limit in IPv6) from the received STAMP test packet. o MBZ is used to achieve alignment on a four octets boundary. The value of the field MAY be zeroed on transmission and MUST be ignored on receipt. 4.2.2. Session-Reflector Packet Format in Authenticated Mode For the authenticated mode: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence Number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MBZ (12 octets) | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Error Estimate | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | MBZ (6 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Receive Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MBZ (8 octets) | | | Mirsky, et al. Expires February 13, 2020 [Page 9] Internet-Draft STAMP August 2019 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Session-Sender Sequence Number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MBZ (12 octets) | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Session-Sender Timestamp | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Session-Sender Error Estimate | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | MBZ (6 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Ses-Sender TTL | | +-+-+-+-+-+-+-+-+ + | | | MBZ (15 octets) | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | HMAC (16 octets) | | | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 6: STAMP Session-Reflector test packet format in authenticated mode The field definitions are the same as the unauthenticated mode, listed in Section 4.2.1. Additionally, the MBZ field is used to align the packet on 16 octets boundary. The value of the field MAY be zeroed on transmission and MUST be ignored on receipt. Also, STAMP Session-Reflector test packet format in authenticated mode includes a key (HMAC) ([RFC2104]) hash at the end of the PDU. The detailed use of the HMAC field is in Section 4.3. 4.3. Integrity and Confidentiality Protection in STAMP To provide integrity protection, each STAMP message is being authenticated by adding Hashed Message Authentication Code (HMAC). STAMP uses HMAC-SHA-256 truncated to 128 bits (similarly to the use of it in IPSec defined in [RFC4868]); hence the length of the HMAC field is 16 octets. HMAC uses its own key, and the definition of the mechanism to distribute the HMAC key is outside the scope of this specification. One example is to use an orchestrator to configure HMAC key based on STAMP YANG data model [I-D.ietf-ippm-stamp-yang]. Mirsky, et al. Expires February 13, 2020 [Page 10] Internet-Draft STAMP August 2019 HMAC MUST be verified as early as possible to avoid using or propagating corrupted data. If confidentiality protection for STAMP is required, encryption at the higher level MUST be used. For example, STAMP packets could be transmitted in the dedicated IPsec tunnel or share the IPsec tunnel with the monitored flow. 4.4. Interoperability with TWAMP Light One of the essential requirements to STAMP is the ability to interwork with a TWAMP Light device. There are two possible combinations for such use case: o STAMP Session-Sender with TWAMP Light Session-Reflector; o TWAMP Light Session-Sender with STAMP Session-Reflector. In the former case, the Session-Sender MAY not be aware that its Session-Reflector does not support STAMP. For example, a TWAMP Light Session-Reflector may not support the use of UDP port 862 as defined in [RFC8545]. Thus STAMP Session-Sender MAY use port numbers as defined in Section 4. If any of STAMP extensions are used, the TWAMP Light Session-Reflector will view them as Packet Padding field. The Session-Sender SHOULD use the default format for its timestamps - NTP. And it MAY use PTPv2 timestamp format. In the latter scenario, if a TWAMP Light Session-Sender does not support the use of UDP port 862, the test management system MUST set STAMP Session-Reflector to use UDP port number as defined in Section 4. If the TWAMP Light Session-Sender includes Packet Padding field in its transmitted packet, the STAMP Session-Reflector will return the reflected packet of the symmetrical size if the size of the received test packet is larger than the size of the STAMP base packet. The Session-Reflector MUST be set to use the default format for its timestamps, NTP. STAMP does not support the Reflect Octets capability defined in [RFC6038]. If the Server Octets field is present in the TWAMP Session-Sender packet, STAMP Session-Reflector will not copy the content starting from the Server Octets field but will transmit the reflected packet of equal size. 5. IANA Considerations This document doesn't have any IANA action. This section may be removed before the publication. Mirsky, et al. Expires February 13, 2020 [Page 11] Internet-Draft STAMP August 2019 6. Security Considerations In general, all the security considerations related to TWAMP-Test, discussed in [RFC5357] apply to STAMP. Since STAMP uses the well- known UDP port number allocated for the OWAMP-Test/TWAMP-Test Receiver port, the security considerations and measures to mitigate the risk of the attack using the registered port number documented in Section 6 [RFC8545] equally apply to STAMP. Because of the control and management of a STAMP test being outside the scope of this specification only the more general requirement is set: To mitigate the possible attack vector, the control, and management of a STAMP test session MUST use the secured transport. Load of STAMP test packets offered to a network MUST be carefully estimated, and the possible impact on the existing services MUST be thoroughly analyzed before launching the test session. [RFC8085] section 3.1.5 provides guidance on handling network load for UDP-based protocol. While the characteristic of test traffic depends on the test objective, it is highly recommended to stay in the limits as provided in [RFC8085]. STAMP test packets can be transmitted with the destination UDP port number from the User Ports range, as defined in Section 4, that is already or will be assigned by IANA. The possible impact of the STAMP test packets on the network MUST be thoroughly analyzed, and the use of STAMP for each case MUST be agreed by all users on the network before starting the STAMP test session. Use of HMAC-SHA-256 in the authenticated mode protects the data integrity of the STAMP test packets. 7. Acknowledgments Authors express their appreciation to Jose Ignacio Alvarez-Hamelin and Brian Weis for their great insights into the security and identity protection, and the most helpful and practical suggestions. Also, our sincere thanks to David Ball and Rakesh Gandhi or their thorough reviews and helpful comments. 8. References 8.1. Normative References [IEEE.1588.2008] "Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems", IEEE Standard 1588, March 2008. Mirsky, et al. Expires February 13, 2020 [Page 12] Internet-Draft STAMP August 2019 [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC4656] Shalunov, S., Teitelbaum, B., Karp, A., Boote, J., and M. Zekauskas, "A One-way Active Measurement Protocol (OWAMP)", RFC 4656, DOI 10.17487/RFC4656, September 2006, . [RFC5357] Hedayat, K., Krzanowski, R., Morton, A., Yum, K., and J. Babiarz, "A Two-Way Active Measurement Protocol (TWAMP)", RFC 5357, DOI 10.17487/RFC5357, October 2008, . [RFC5905] Mills, D., Martin, J., Ed., Burbank, J., and W. Kasch, "Network Time Protocol Version 4: Protocol and Algorithms Specification", RFC 5905, DOI 10.17487/RFC5905, June 2010, . [RFC6038] Morton, A. and L. Ciavattone, "Two-Way Active Measurement Protocol (TWAMP) Reflect Octets and Symmetrical Size Features", RFC 6038, DOI 10.17487/RFC6038, October 2010, . [RFC6335] Cotton, M., Eggert, L., Touch, J., Westerlund, M., and S. Cheshire, "Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry", BCP 165, RFC 6335, DOI 10.17487/RFC6335, August 2011, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8186] Mirsky, G. and I. Meilik, "Support of the IEEE 1588 Timestamp Format in a Two-Way Active Measurement Protocol (TWAMP)", RFC 8186, DOI 10.17487/RFC8186, June 2017, . [RFC8545] Morton, A., Ed. and G. Mirsky, Ed., "Well-Known Port Assignments for the One-Way Active Measurement Protocol (OWAMP) and the Two-Way Active Measurement Protocol (TWAMP)", RFC 8545, DOI 10.17487/RFC8545, March 2019, . Mirsky, et al. Expires February 13, 2020 [Page 13] Internet-Draft STAMP August 2019 8.2. Informative References [BBF.TR-390] "Performance Measurement from IP Edge to Customer Equipment using TWAMP Light", BBF TR-390, May 2017. [I-D.ietf-ippm-stamp-option-tlv] Mirsky, G., Xiao, M., Jun, G., Nydell, H., and R. Foote, "Simple Two-way Active Measurement Protocol Optional Extensions", draft-ietf-ippm-stamp-option-tlv-00 (work in progress), July 2019. [I-D.ietf-ippm-stamp-yang] Mirsky, G., Xiao, M., and W. Luo, "Simple Two-way Active Measurement Protocol (STAMP) Data Model", draft-ietf-ippm- stamp-yang-03 (work in progress), March 2019. [RFC2104] Krawczyk, H., Bellare, M., and R. Canetti, "HMAC: Keyed- Hashing for Message Authentication", RFC 2104, DOI 10.17487/RFC2104, February 1997, . [RFC4868] Kelly, S. and S. Frankel, "Using HMAC-SHA-256, HMAC-SHA- 384, and HMAC-SHA-512 with IPsec", RFC 4868, DOI 10.17487/RFC4868, May 2007, . [RFC7750] Hedin, J., Mirsky, G., and S. Baillargeon, "Differentiated Service Code Point and Explicit Congestion Notification Monitoring in the Two-Way Active Measurement Protocol (TWAMP)", RFC 7750, DOI 10.17487/RFC7750, February 2016, . [RFC8085] Eggert, L., Fairhurst, G., and G. Shepherd, "UDP Usage Guidelines", BCP 145, RFC 8085, DOI 10.17487/RFC8085, March 2017, . Authors' Addresses Greg Mirsky ZTE Corp. Email: gregimirsky@gmail.com Mirsky, et al. Expires February 13, 2020 [Page 14] Internet-Draft STAMP August 2019 Guo Jun ZTE Corporation 68# Zijinghua Road Nanjing, Jiangsu 210012 P.R.China Phone: +86 18105183663 Email: guo.jun2@zte.com.cn Henrik Nydell Accedian Networks Email: hnydell@accedian.com Richard Foote Nokia Email: footer.foote@nokia.com Mirsky, et al. 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Wed, 4 Sep 2019 05:36:59 +0000 From: "Frank Brockners (fbrockne)" To: Haoyu Song , "draft-ietf-ippm-ioam-data@ietf.org" , IETF IPPM WG , Tom Herbert Thread-Topic: [ippm] Review on draft-ietf-ippm-ioam-data-06 Thread-Index: AdVRaVuwRvhTeI2VTDyRJBkRgBuuOwAPCiFABE81OsA= Date: Wed, 4 Sep 2019 05:36:58 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=fbrockne@cisco.com; x-originating-ip: [173.38.220.45] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d2952e19-1e27-4be7-47c2-08d730f9e7f1 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:BYAPR11MB2934; x-ms-traffictypediagnostic: BYAPR11MB2934: x-ms-exchange-purlcount: 1 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: d2952e19-1e27-4be7-47c2-08d730f9e7f1 X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Sep 2019 05:36:59.0615 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: yZOh3UU7YyD9i0fbwCZ4zoZ9Bl85gclvMzQebNhCmyx5J5ErFHiVP0Z0VIcQv0zX82+AAYOLbkTRh5/XPtMFhg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB2934 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.36.7.24, xch-aln-014.cisco.com X-Outbound-Node: rcdn-core-12.cisco.com Archived-At: Subject: Re: [ippm] Review on draft-ietf-ippm-ioam-data-06 X-BeenThere: ippm@ietf.org 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: Wed, 04 Sep 2019 05:37:20 -0000 Thanks again detailed comments (special thanks to Tom and Haoyu). There is a new pull request available which reflect these comments: https://github.com/inband-oam/ietf/pull/133. Please review.=20 I'm hoping to get it merged by the end of this week. Thanks, Frank > -----Original Message----- > From: Frank Brockners (fbrockne) > Sent: Dienstag, 13. August 2019 09:08 > To: Haoyu Song ; draft-ietf-ippm-ioam- > data@ietf.org; IETF IPPM WG > Subject: RE: [ippm] Review on draft-ietf-ippm-ioam-data-06 >=20 > Hi Haoyu, >=20 > Thanks for your comments. They key point you raise is consistent nomencla= ture > - which we definitively need to address in the next revision. Not uncommo= n for a > document with many different authors - but now is indeed the time to tidy= things > up and get the house in order. >=20 > Thanks again, Frank >=20 > > -----Original Message----- > > From: Haoyu Song > > Sent: Dienstag, 13. August 2019 02:00 > > To: draft-ietf-ippm-ioam-data@ietf.org; IETF IPPM WG > > Subject: [ippm] Review on draft-ietf-ippm-ioam-data-06 > > > > Dear IOAM data authors and IPPM WG, > > > > To sync up with the latest, I reread the draft and gave it a full revie= w. > > Some questions, comments, and suggestions are marked in the document. > > Hopefully this can help to tighten the draft. > > Thanks! > > > > Best regards, > > Haoyu > > From nobody Wed Sep 4 06:54:09 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 71606120100; Wed, 4 Sep 2019 06:54:08 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Magnus Westerlund via Datatracker To: "The IESG" Cc: draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , ippm-chairs@ietf.org, tal.mizrahi.phd@gmail.com, ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Magnus Westerlund Message-ID: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 06:54:08 -0700 Archived-At: Subject: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 13:54:09 -0000 Magnus Westerlund has entered the following ballot position for draft-ietf-ippm-stamp-07: Discuss When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- Two very much discussing discusses. However, I would really like to hear the answer to these concerns before clearing. 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If there ever would exist a need to deploy another integrity solution, even if the actual algorithm used to construct the tag can be agreed by the management, there appear to exist a hard look in to use 16-byte tags. Have this issue been considered? 2. Section 6: The possible impact of the STAMP test packets on the network MUST be thoroughly analyzed, and the use of STAMP for each case MUST be agreed by all users on the network before starting the STAMP test session. I assume some potential issues are know, shouldn't they really be listed here in the security consideration to further motivate why the analysis needs to happen. ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- 1. Section 4: Before using numbers from the User Ports range, the possible impact on the network MUST be carefully studied and agreed by all users of the network. Is the above sentence missing to list an important assumption? Is the assumption that by using the registred destination port an operator that sees to much STAMP traffic can simply filter it out and that way deal with the traffic, something which is not possible when using an locally decided port? If that is the case, this assumption should probably be noted. 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? Is that a measurment session between one specific and sender and a specific reflector for a time duration? The defenition of the session do matter if one intended to enable a single sender to use multiple reflectors, and if that can be a single session or always multiple indepdendent ones. Would appreciate a definition what a session is. If it is possible to send STAMP traffic using a multicast or broadcast address should be made explicit. 3. Section 4.1.1.: Timestamp is eight octets long field. STAMP node MUST support Network Time Protocol (NTP) version 4 64-bit timestamp format [RFC5905], the format used in [RFC5357]. STAMP node MAY support IEEE 1588v2 Precision Time Protocol truncated 64-bit timestamp format [IEEE.1588.2008], the format used in [RFC8186]. Is the clock source here something that may be relevant or simply information the management functions should capture. I think there is a similar issue to that of RTP faced when it comes to understand what the timestamp actually represent and thus be used correctly. RTP clock source specification is RFC 7273 (https://datatracker.ietf.org/doc/rfc7273/) 4. Section 4.1: Because STAMP supports symmetrical test packets, STAMP Session-Sender packet has a minimum size of 44 octets in unauthenticated mode, see Figure 2, and 112 octets in the authenticated mode, see Figure 4. The above text implies some potential for UDP payload size variability for the STAMP packets. However, the actual definition appear to have fixed sizes. Can you please clarify if I have missed something that enables the STAMP packet to have variable size? From nobody Wed Sep 4 09:53:20 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 099EA120A3A; Wed, 4 Sep 2019 09:53:12 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Barry Leiba via Datatracker To: "The IESG" Cc: draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , ippm-chairs@ietf.org, tal.mizrahi.phd@gmail.com, ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Barry Leiba Message-ID: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 09:53:12 -0700 Archived-At: Subject: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 16:53:13 -0000 Barry Leiba has entered the following ballot position for draft-ietf-ippm-stamp-07: Discuss When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- I'm sure this will be easy to either explain to me or re-phrase: Sections 4 and 6 both say something like "MUST be agreed by all users of the network". What does that really mean? How is it remotely possible to get agreement from all users of your network? How is it remotely possible that they could understand what you're asking them to agree to? From nobody Wed Sep 4 17:50:31 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 034CF1208E4; Wed, 4 Sep 2019 17:50:21 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Benjamin Kaduk via Datatracker To: "The IESG" Cc: draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , ippm-chairs@ietf.org, tal.mizrahi.phd@gmail.com, ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Benjamin Kaduk Message-ID: <156764462100.22846.16937322291769285829.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 17:50:21 -0700 Archived-At: Subject: [ippm] Benjamin Kaduk's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 00:50:22 -0000 Benjamin Kaduk has entered the following ballot position for draft-ietf-ippm-stamp-07: Discuss When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- We don't ever clearly state that the protocol allows for packet sizes other than the listed 44- and 112-octet variants, that content larger than that is to be treated as padding unless directed otherwise by configuration, that the reflected packet must be the same size as the incoming packet, and how a Session-Reflector should set any such padding that it needs to add in order to produce a same-sized packet. This document hardcodes the truncated HMAC-SHA-256 algorithm. Per BCP 201, what is the procedure for cryptographic algorithm agility? Please also consider the discussion in BCP 107 about key lifecycles and key management, including whether it is appropriate to use a key-derivation function to produce short-term (e.g., per flow) keys from a long-lived key (e.g., one fixed in static configuration). What is the input plaintext to the HMAC computation? In the case of future extensions, does the HMAC field remain at its current fixed offset in the packet or move to always be the last 16 octets? Is any additional padding/TLV content protected by the HMAC? What error does the error estimate ... estimate? Clock skew between sender and receiver? I think we need to require some level of cryptographic protection whenever control information is included in a Session-Sender's test packet. That is, that a Session-Reflector MUST NOT act on control information received in unauthenticated packets. (That said, this document itself does not describe a way to include control information, so perhaps the note about "optional control information communicated in the Session-Sender's test packet" in Section 4 is misplaced. In Section 4.2.1: o Timestamp and Receiver Timestamp fields are each eight octets long. The format of these fields, NTP or PTPv2, indicated by the Z flag of the Error Estimate field as described in Section 4.1. I think you need to explicitly say that "Timestamp" is echoed from the received packet and "Receiver Timestamp" is determined locally as close to (reciept? transmission?) as possible. I think we need greater clarity on whether the normative statements in Section 4.4 apply only to STAMP peers that are aware they are interacting with TWAMP Light, or apply to all STAMP peers (see Comment for further discussion on why the current text seems internally inconsistent). In Section 4.1.1: o Timestamp is eight octets long field. STAMP node MUST support Network Time Protocol (NTP) version 4 64-bit timestamp format [RFC5905], the format used in [RFC5357]. STAMP node MAY support IEEE 1588v2 Precision Time Protocol truncated 64-bit timestamp format [IEEE.1588.2008], the format used in [RFC8186]. I think a note that which one is in use will be configured by the configuration/management function is in order. Except that the Z bit below confuses things terribly... The STAMP Session-Sender and Session-Reflector MAY use, not use, or set value of the Z field in accordance with the timestamp format in use. This optional field is to enhance operations, but local configuration or defaults could be used in its place. ... since, as noted by the secdir reviewer, this line just confuses everything. Either keep the "must be zero" semantics of 4656 or the "MUST match reality" semantics of 8186, but this middle case is actively harmful. (I also support Barry and Magnus' Discusses.) ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Section 1 I'll note several grammar nits, inline, though perhaps some of them will not apply after the rewrite in response to the secdir review: Development and deployment of Two-Way Active Measurement Protocol "the Two-Way" (TWAMP) [RFC5357] and its extensions, e.g., [RFC6038] that defined features such as Reflect Octets and Symmetrical Size for TWAMP comma after TWAMP provided invaluable experience. Several independent implementations exist, have been deployed and provide important operational performance measurements. At the same time, there has been noticeable interest in using a more straightforward mechanism for active performance monitoring that can provide deterministic behavior and inherit separation of control (vendor-specific configuration or "inherit" from what? orchestration) and test functions. One of such is Performance "One such mechanism is" Measurement from IP Edge to Customer Equipment using TWAMP Light from Broadband Forum [BBF.TR-390] used as the reference TWAMP Light that, I'm not sure what the intent here is, but maybe ", which is used as the reference TWAMP Light". according to [RFC8545], includes sub-set of TWAMP-Test functions in I'd also suggest starting a new sentence for "According to [RFC8545]" (and adding the then-needed "this" and "a" for "this includes a"). combination with other applications that provide, for example, control and security. This document defines an active performance measurement test protocol, Simple Two-way Active Measurement Protocol (STAMP), that enables measurement of both one-way and round-trip performance metrics like delay, delay variation, and packet loss. I agree with the secdir reviewer that the relationship between STAMP and TWAMP Light could be much more clear. Section 2.1 MBZ May be Zero I commonly see this expand to "Must be zero"; requiring the sender to not set any bits seems more likely to preserve the ability to use the field for future extensibility, since a recipient that sees a nonzero bit knows it was consciously set (i.e., with intent to use the extension) rather than inadvertently set by someone expecting it to be ignored. (Also, if the bits are covered under the HMAC, then the recipient can't actually ignore them, since they have to be used to verify the HMAC.) Section 3 be achieved through various means. Command Line Interface, OSS/BSS (operations support system/business support system as a combination of two systems used to support a range of telecommunication services) using SNMP or controllers in Software-Defined Networking using Netconf/YANG are but a few examples. nit: if "using SNMP or controllers[...]" is supposed to be separate from "OSS/BSS", then some additional punctuation/conjunction is needed. Section 4 number. A STAMP implementation of Session-Sender MUST be able to use UDP port numbers from User, a.k.a. Registered, Ports and Dynamic, a.k.a. Private or Ephemeral, Ports ranges defined in [RFC6335]. Able to use as source, destination, or both? (We just talked about destination but not source in the previous sentence.) Section 4.1 Because STAMP supports symmetrical test packets, STAMP Session-Sender packet has a minimum size of 44 octets in unauthenticated mode, see Figure 2, and 112 octets in the authenticated mode, see Figure 4. nit: I don't see how merely "support"ing (as opposed to "require"ing or "use"ing) symmetrical packets implies these minimum packet sizes. (That is, I find the word "because" unjustified absent some statement that requires the Session-Reflector packets to be that size and a requirement for the symmetry is present.) Section 4.2 That implies that the STAMP Session-Reflector MUST keep a state for each accepted STAMP-test session, uniquely identifying STAMP- test packets to one such session instance, and enabling adding a sequence number in the test reply that is individually incremented on a per-session basis. How does it "accept a STAMP-test session"? Section 4.2.1 * in the stateful mode the Session-Reflector counts the received STAMP test packets in each test session and uses that counter to set the value of the Sequence Number field. Should we say anything about whether the initial sequence number (having received one packet from the Session-Sender) is zero or one? Section 4.2.2 Also, STAMP Session-Reflector test packet format in authenticated mode includes a key (HMAC) ([RFC2104]) hash at the end of the PDU. The detailed use of the HMAC field is in Section 4.3. nit: "keyed" Section 4.3 I think we should have a statement about HMAC key (non-)reuse across separate measurement sessions. I agree with the secdir reviewer that the confidentiality protection seems like something that would be done at a "lower" level, not a "higher" level. Section 4.4 In the former case, the Session-Sender MAY not be aware that its It's unclear that this "MAY" is normative as opposed to descriptive. Session-Reflector does not support STAMP. For example, a TWAMP Light Session-Reflector may not support the use of UDP port 862 as defined in [RFC8545]. Thus STAMP Session-Sender MAY use port numbers as defined in Section 4. If any of STAMP extensions are used, the TWAMP Light Session-Reflector will view them as Packet Padding field. The Session-Sender SHOULD use the default format for its timestamps - NTP. And it MAY use PTPv2 timestamp format. Given the above note about not knowing that the peer is TWAMP Light vs. STAMP, it seems that this SHOULD/MAY apply to all STAMP implementations, not just ones that are interacting with TWAMP Light. Which in turn might suggest that the normative statements are best made in a different section. (Also (nit), where do we say that NTP is the default format?) In the latter scenario, if a TWAMP Light Session-Sender does not support the use of UDP port 862, the test management system MUST set STAMP Session-Reflector to use UDP port number as defined in Section 4. If the TWAMP Light Session-Sender includes Packet Padding field in its transmitted packet, the STAMP Session-Reflector will return the reflected packet of the symmetrical size if the size of the received test packet is larger than the size of the STAMP base packet. The Session-Reflector MUST be set to use the default format for its timestamps, NTP. On the other hand, if we take the same approach here, and assume that the Session-Reflector may not know that the Session-Sender is TWAMP Light vs. STAMP, then this MUST would seem to always apply, and thus prevent the Session-Reflector from ever using the PTPv2 timestamp format, in which case the text related to its doing so is "dead code" and should be removed to avoid confusion. Section 8.2 RFC 2104 needs to be a normative reference. The truncation of the HMAC is simple enough that we probably don't need to consider RFC 4868 normative just for it, though. From nobody Wed Sep 4 18:45:25 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 42F4612004C; Wed, 4 Sep 2019 18:45:16 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: Roman Danyliw via Datatracker To: "The IESG" Cc: draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , ippm-chairs@ietf.org, tal.mizrahi.phd@gmail.com, ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Roman Danyliw Message-ID: <156764791626.22774.7572696173575309052.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 18:45:16 -0700 Archived-At: Subject: [ippm] Roman Danyliw's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 01:45:16 -0000 Roman Danyliw has entered the following ballot position for draft-ietf-ippm-stamp-07: Discuss When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- (1) Section 4.3. The text does not explicitly state the data on which the HMAC is computed (i.e., bytes 1 to the end of the last MBZ field of the message?) (2) Section 6. Per “In general, all the security considerations related to TWAMP-Test, discussed in [RFC5357] apply to STAMP.”, what exact guidance is relevant here: -- Section 6 (Security Considerations) of RFC5357 says follow the guidance of RFC4656 and guidance on the OWAMP Server-Greeting messages, only the former seems relevant -- Section 6 (Security Considerations) of RFC4656 has: Section 6.1 which discusses authenticated and encrypted mode of OWAMP; but STAMP has no encrypted mode. The claims about authenticate mode seem to be similar to OWAMP, but that’s not explicitly said Section 6.2 discusses DoS, seems to have some related guidance but also discusses TCP handshakes Section 6.3 discusses covert channels, this seems relevant Section 6.4 seems to discuss key management that section 4.3 of this draft seems to suggest is out of scope Section 6.5 seems to provide guidance on resource provisioning but uses the KeyID primitive that doesn’t appear present in this draft [please review the other sections too ...] ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- I support Barry Leiba’s DISCUSS. I also support Magnus Westerlund’s DISCUSS. See #4. (2) Section 4.1.1. The sequence number is defined in terms of a “new session”. However, I couldn’t find the precise definition of a “session” – how is new one initiated? terminated? (3) Section 4.2.1. Per Session-Sender TTL, this field is defined, the guidance on generating its value is clear, but its use is not explained. (4) Section 4.3. Related question to Magnus Westerlund’s DISCUSS, what is the planned approach for crypto agility? (5) Section 4.3. Per, “HMAC uses its own key, and the definition of the mechanism to distribute the HMAC key is outside the scope of this specification.” -- What is being suggested by “uses its own key”? -- Is it expected that each Session-Sender/Reflector pair would have a unique key? -- Recommend being clearer on what’s out of scope, perhaps something on the order of: s/… the definition of the mechanism to distribute the HMAC key is outside the scope of this specification./ … key management and the mechanisms to distribute the HMAC key is outside the scope of this specification.” (5) Section 4.3. Thanks for responded to Russ Housley’s SECDIR review and proposing the new Section 4.3 and 4.4. It provides helpful clarity. (6) Editorial Nits -- Section 3. I didn’t understand the title of ‘Softwarization of Performance Management’. The text of the section seems to simply describe the elements of Figure 1 and suggests a few ways to configure the these elements. -- Section 4. Typo. s/MUST use received/MUST received/ -- Section 6. Editorial. s/Load of STAMP test packets/The load of the STAMP test packets/ From nobody Thu Sep 5 07:05:24 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id B28E11200CD; Thu, 5 Sep 2019 07:05:16 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Martin Vigoureux via Datatracker To: "The IESG" Cc: draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , ippm-chairs@ietf.org, tal.mizrahi.phd@gmail.com, ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Martin Vigoureux Message-ID: <156769231672.22739.6443411633239129567.idtracker@ietfa.amsl.com> Date: Thu, 05 Sep 2019 07:05:16 -0700 Archived-At: Subject: [ippm] Martin Vigoureux's No Objection on draft-ietf-ippm-stamp-07: (with COMMENT) X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 14:05:17 -0000 Martin Vigoureux has entered the following ballot position for draft-ietf-ippm-stamp-07: No Objection When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- I support Barry's DISCUSS. Also a few points are not clear: o Stateless - STAMP Session-Reflector does not maintain test state and will reflect the received sequence number without modification. This is not the only thing that the reflector reflects, right? The STAMP Session-Sender and Session-Reflector MAY use, not use, or set value of the Z field in accordance with the timestamp format in use. This optional field is to enhance operations, but local configuration or defaults could be used in its place. What do you mean by "use"and how does that differ from "set"? Also the fact that it is described as optional here but as "MUST/SHOULD be set to NTP" in interop with TWAMP light is confusing. From nobody Sat Sep 7 14:37:30 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 191B7120164; Sat, 7 Sep 2019 14:37:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-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 b513gihmghJe; Sat, 7 Sep 2019 14:37:25 -0700 (PDT) Received: from mx0a-00191d01.pphosted.com (mx0b-00191d01.pphosted.com [67.231.157.136]) (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 336AE120145; Sat, 7 Sep 2019 14:37:25 -0700 (PDT) Received: from pps.filterd (m0083689.ppops.net [127.0.0.1]) by m0083689.ppops.net-00191d01. 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(Service) with ESMTP id 91EC540002D8; Sat, 7 Sep 2019 21:36:52 +0000 (GMT) Received: from sldc.sbc.com (localhost [127.0.0.1]) by clpi183.sldc.sbc.com (8.14.5/8.14.5) with ESMTP id x87LaqqV005699; Sat, 7 Sep 2019 16:36:52 -0500 Received: from mail-azure.research.att.com (mail-azure.research.att.com [135.207.255.18]) by clpi183.sldc.sbc.com (8.14.5/8.14.5) with ESMTP id x87Lamju005439; Sat, 7 Sep 2019 16:36:48 -0500 Received: from exchange.research.att.com (njbdcas1.research.att.com [135.197.255.61]) by mail-azure.research.att.com (Postfix) with ESMTP id D8140E5900; Sat, 7 Sep 2019 17:36:00 -0400 (EDT) Received: from njmtexg5.research.att.com ([fe80::b09c:ff13:4487:78b6]) by njbdcas1.research.att.com ([fe80::8c6b:4b77:618f:9a01%11]) with mapi id 14.03.0468.000; Sat, 7 Sep 2019 17:36:44 -0400 From: "MORTON, ALFRED C (AL)" To: "Brian Trammell (IETF)" , Mirja Kuehlewind CC: Michelle Cotton , "draft-ietf-ippm-initial-registry.all@ietf.org" , IETF IPPM WG Thread-Topic: [ippm] AD review of draft-ietf-ippm-initial-registry-11 Thread-Index: AQHVXO7t1Dc8eia/wEeItN2FmjYM8qcUJFvggARoOoCAAEL6AIAH/iGA Date: Sat, 7 Sep 2019 21:36:43 +0000 Message-ID: <4D7F4AD313D3FC43A053B309F97543CFA0AF4E49@njmtexg5.research.att.com> References: <40A0B71C-4857-46F0-9096-6EE289E7404B@kuehlewind.net> <4D7F4AD313D3FC43A053B309F97543CFA0AF30B4@njmtexg5.research.att.com> <2292EEC5-9924-496C-82C2-85D896620807@trammell.ch> In-Reply-To: <2292EEC5-9924-496C-82C2-85D896620807@trammell.ch> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.141.203.172] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-07_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909070234 Archived-At: Subject: Re: [ippm] AD review of draft-ietf-ippm-initial-registry-11 X-BeenThere: ippm@ietf.org 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, 07 Sep 2019 21:37:28 -0000 TGV0IG1lIGFkZCB0aGF0IHRoZXJlIGFyZSB+dHdvICJwcml2YXRlIiBpbXBsZW1lbnRhdGlvbnMg b2YgdGhlIA0KcmVnaXN0cnksIEJCRidzIGFuZCBhbm90aGVyIGluIEJyYXppbC4gQWxzbywgQkVS RUMgdXNlcw0KTE1BUCByZXF1aXJlbWVudHMgZm9yIHRoZWlyIHNlbGVjdGVkIHN5c3RlbS4NCg0K QWwNCg0KPiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPiBGcm9tOiBCcmlhbiBUcmFtbWVs bCAoSUVURikgW21haWx0bzppZXRmQHRyYW1tZWxsLmNoXQ0KPiBTZW50OiBNb25kYXksIFNlcHRl bWJlciAyLCAyMDE5IDExOjI5IEFNDQo+IFRvOiBNaXJqYSBLdWVobGV3aW5kIDxpZXRmQGt1ZWhs 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(Service) with ESMTP id 8EAF94005C2C; Sat, 7 Sep 2019 22:09:33 +0000 (GMT) Received: from sldc.sbc.com (localhost [127.0.0.1]) by clpi183.sldc.sbc.com (8.14.5/8.14.5) with ESMTP id x87M9XIC030449; Sat, 7 Sep 2019 17:09:33 -0500 Received: from mail-azure.research.att.com (mail-azure.research.att.com [135.207.255.18]) by clpi183.sldc.sbc.com (8.14.5/8.14.5) with ESMTP id x87M9SvR030163; Sat, 7 Sep 2019 17:09:29 -0500 Received: from exchange.research.att.com (njbdcas1.research.att.com [135.197.255.61]) by mail-azure.research.att.com (Postfix) with ESMTP id 3504FE590E; Sat, 7 Sep 2019 18:08:41 -0400 (EDT) Received: from njmtexg5.research.att.com ([fe80::b09c:ff13:4487:78b6]) by njbdcas1.research.att.com ([fe80::8c6b:4b77:618f:9a01%11]) with mapi id 14.03.0468.000; Sat, 7 Sep 2019 18:09:24 -0400 From: "MORTON, ALFRED C (AL)" To: Mirja Kuehlewind , "draft-ietf-ippm-metric-registry.all@ietf.org" CC: IETF IPPM WG , Michelle Cotton Thread-Topic: AD review of draft-ietf-ippm-metric-registry-19 Thread-Index: AQHVXN15AQy7FexigUuWlNjVu81huacgxm0A Date: Sat, 7 Sep 2019 22:09:22 +0000 Message-ID: <4D7F4AD313D3FC43A053B309F97543CFA0AF4E6B@njmtexg5.research.att.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.141.203.172] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-07_11:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909070240 Archived-At: Subject: Re: [ippm] AD review of draft-ietf-ippm-metric-registry-19 X-BeenThere: ippm@ietf.org 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IHJlZ2lzdHJ5DQp0aGF0IHdlIGNhbiBzaGFyZSB3aXRoIG90aGVycyAod2hlbiB0aGlzIHF1ZXN0 aW9uIGNvbWVzIHVwIGFnYWluLA0KYW5kIGl0IHdpbGwgZHVyaW5nIElFU0cgcmV2aWV3LCBJIGFz c3VyZSB5b3UhKS4NCg0KQWwNCg== From nobody Sun Sep 8 05:43:00 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7AA02120018; Sun, 8 Sep 2019 05:42:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.6 X-Spam-Level: X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-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 mf9eMiScv3-H; Sun, 8 Sep 2019 05:42:52 -0700 (PDT) Received: from mx0a-00191d01.pphosted.com (mx0a-00191d01.pphosted.com [67.231.149.140]) (using TLSv1.2 with cipher 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Subject: Re: [ippm] AD review of draft-ietf-ippm-initial-registry-11 X-BeenThere: ippm@ietf.org 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: Sun, 08 Sep 2019 12:42:57 -0000 SGkgTWFyaWEsDQoNCldlJ3ZlIHN0YXJ0ZWQgdGhlIGRpc2N1c3Npb24gb24gSW50ZW5kZWQgU3Rh dHVzLA0Kc28gSSdsbCBzdGFydCB3aXRoIHRoZSBxdWlja2VyIHF1ZXN0aW9ucyBhbmQgY29tbWVu dHMNCm9uIGluaXRpYWwtcmVnaXN0cnkgZHJhZnQgYmVsb3cuDQoNCkFsIA0KDQo+IC0tLS0tT3Jp Z2luYWwgTWVzc2FnZS0tLS0tDQo+IEZyb206IE1pcmphIEt1ZWhsZXdpbmQgW21haWx0bzppZXRm QGt1ZWhsZXdpbmQubmV0XQ0KPiBTZW50OiBUdWVzZGF5LCBBdWd1c3QgMjcsIDIwMTkgMTE6NDcg QU0NCj4gVG86IGRyYWZ0LWlldGYtaXBwbS1pbml0aWFsLXJlZ2lzdHJ5LmFsbEBpZXRmLm9yZw0K PiBDYzogSUVURiBJUFBNIFdHIDxpcHBtQGlldGYub3JnPjsgTWljaGVsbGUgQ290dG9uDQo+IDxt aWNoZWxsZS5jb3R0b25AaWFuYS5vcmc+DQo+IFN1YmplY3Q6IEFEIHJldmlldyBvZiBkcmFmdC1p 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Subject: Re: [ippm] AD review of draft-ietf-ippm-initial-registry-11 X-BeenThere: ippm@ietf.org 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: Sun, 08 Sep 2019 16:36:09 -0000 SGkgTWlyamEsIA0KSSBwcmVzc2VkIFNFTkQgYWNjaWRlbnRhbGx5LCBldmVuIHdpdGggd3Jvbmcg bmFtZSwgU29ycnkhDQooIk1vcmUgY29mZmVlLCBwbGVhc2UuIikgQ29udGludWluZyBvbiByZWZl cmVuY2UgdG9waWNzLg0KDQpXZSd2ZSBzdGFydGVkIHRoZSBkaXNjdXNzaW9uIG9uIEludGVuZGVk IFN0YXR1cywNCnNvIEknbGwgc3RhcnQgd2l0aCB0aGUgcXVpY2tlciBxdWVzdGlvbnMgYW5kIGNv bW1lbnRzDQpvbiBpbml0aWFsLXJlZ2lzdHJ5IGRyYWZ0IGJlbG93LCBvbiByZWZlcmVuY2VzIHRv cGljcy4NCg0KQWwgDQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogTWly amEgS3VlaGxld2luZCBbbWFpbHRvOmlldGZAa3VlaGxld2luZC5uZXRdDQo+IFNlbnQ6IFR1ZXNk YXksIEF1Z3VzdCAyNywgMjAxOSAxMTo0NyBBTQ0KPiBUbzogZHJhZnQtaWV0Zi1pcHBtLWluaXRp 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amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=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 jD5KYpQ62COJ; Mon, 9 Sep 2019 01:17:49 -0700 (PDT) Received: from wp513.webpack.hosteurope.de (wp513.webpack.hosteurope.de [IPv6:2a01:488:42:1000:50ed:8223::]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 202F01200C5; Mon, 9 Sep 2019 01:17:49 -0700 (PDT) Received: from 200116b82c80fa001919bc0c110520fa.dip.versatel-1u1.de ([2001:16b8:2c80:fa00:1919:bc0c:1105:20fa]); authenticated by wp513.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) id 1i7Ero-0000uV-9h; Mon, 09 Sep 2019 10:17:44 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: Mirja Kuehlewind In-Reply-To: <4D7F4AD313D3FC43A053B309F97543CFA0AF4FA4@njmtexg5.research.att.com> Date: Mon, 9 Sep 2019 10:17:43 +0200 Cc: "draft-ietf-ippm-initial-registry.all@ietf.org" , IETF IPPM WG , Michelle Cotton Content-Transfer-Encoding: quoted-printable Message-Id: References: <40A0B71C-4857-46F0-9096-6EE289E7404B@kuehlewind.net> <4D7F4AD313D3FC43A053B309F97543CFA0AF4FA4@njmtexg5.research.att.com> To: "MORTON, ALFRED C (AL)" X-Mailer: Apple Mail (2.3445.104.11) X-bounce-key: webpack.hosteurope.de;ietf@kuehlewind.net;1568017069;e3d58111; X-HE-SMSGID: 1i7Ero-0000uV-9h Archived-At: Subject: Re: [ippm] AD review of draft-ietf-ippm-initial-registry-11 X-BeenThere: ippm@ietf.org 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: Mon, 09 Sep 2019 08:17:52 -0000 Hi Al, See below. > On 8. Sep 2019, at 18:35, MORTON, ALFRED C (AL) = wrote: >=20 > Hi Mirja,=20 > I pressed SEND accidentally, even with wrong name, Sorry! > ("More coffee, please.") Continuing on reference topics. No worries! >=20 > We've started the discussion on Intended Status, > so I'll start with the quicker questions and comments > on initial-registry draft below, on references topics. Thanks! >=20 > Al=20 >=20 >> -----Original Message----- >> From: Mirja Kuehlewind [mailto:ietf@kuehlewind.net] >> Sent: Tuesday, August 27, 2019 11:47 AM >> To: draft-ietf-ippm-initial-registry.all@ietf.org >> Cc: IETF IPPM WG ; Michelle Cotton >> >> Subject: AD review of draft-ietf-ippm-initial-registry-11 >>=20 >> Hi authors, hi all, >>=20 >> We need to discuss at least one bigger question on the intended = status >> before we can move ahead. However, as you can seen I have more >> questions/comments below. >>=20 >> The bigger status question first: >> The intended status is PS. The shepherd write-up does not provide any >> additional information about why this status is appropriate. I would >> assume that informational is actually more appropriate. I don=E2=80=99t= recall out >> of my head if/when this was discussed and I thought I rather ask than >> searching the list archive and minutes=E2=80=A6 Is this the right = status and why? >> And if so, please reflect in the write-up! >>=20 >>=20 >> And then a couple more (hopefully) quicker comments/questions: >>=20 >> - I know this was already reviewed by IANA (Michelle is also = cc=E2=80=99ed), >> however, as far as I can see all Administrative Information (Status, >> Requestor, Revision, and Revision Date) and maybe even the ID don=E2=80= =99t need >> to be part of the template because IANA will anyway assign them based = on >> the instructions given in draft-ietf-ippm-metric-registry. Or did = IANA >> explicitly request to also include these parts? > [acm]=20 > I think Michelle and I were more comfortable that the=20 > each section/template indicated exactly where IANA assignments > were needed. It's the line between the shared responsibility of Expert=20= > Review and IANA to create a complete entry in the registry. Okay. >=20 >>=20 >> - Then for the Change Controller that should usually be the IESG = rather >> than the IETF. Did IANA comment on that? > [acm]=20 > Yes, this column is something IANA/Michelle asked for, and I think we=20= > could be convinced that IESG could replace IETF. But to me,=20 > "Standards Action" is IETF. At least in the port registry we have the IESG as change controller. I = was assuming that the =E2=80=9Cnormal=E2=80=9D practice=E2=80=A6 maybe = Michelle can check that. >=20 >>=20 >> - And one minor point: I guess the secY part of the name could = already be >> filled out, no? However, I should probably have asked that on review = of >> draft-ietf-ippm-metric-registry already but I was actually wondering = if >> the decision to include the RFC number and section in the metric name = is >> appropriate. Can you maybe lay out what the reasons for this are (and >> maybe also explain in the draft as his might come up again during = IESG >> review otherwise)=E2=80=A6? > [acm]=20 > The reason is simple, a draft may specify more than one registry = entry, > as -initial-registry does. >=20 > I left the secY part general in case of changes during review. > It's very easy to fill this field at the end, when there is no=20 > possible shuffling of section order that then requires name edits,=20 > too.=20 Given we are basically =E2=80=9Cat the end" I recommend to fill it now. >=20 >>=20 >>=20 >> Then then on references again: >>=20 >> - This draft references two obsoleted RFCs (RFC2679 and RFC2680). I = assume >> this is an oversight and the references need to be updated? > [acm]=20 > Yes, I need to use a text editor and globally update to 7679 and 7680, > XMLMind doesn't seem to let me search in the reference fields easily > (when viewing the XML source). Good. >=20 >>=20 >> - Also given you rely heavily on [Trammell-14], I think this needs to = be a >> normative reference (and maybe [Strowes] as well?). The more stable >> pointer for [Trammell-14] is actually here: >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps- >> 3A__link.springer.com_chapter_10.1007_978-2D3-2D642-2D54999-2D1- >> = 5F2&d=3DDwIFaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3Dh= wJZg- >> = IdxQ9507aw2mjEKKOSWIEVnc8nwr7B_QiOyCU&s=3DHSEAeC_uI-vofX5ZWPSCH-R4Ph8Gu618= - >> YtZJ4pTAgE&e=3D >> But to be honest the split between normative and informational = isn=E2=80=99t >> actually very clear to me here=E2=80=A6? > [acm] > I welcome any advice on this too. If the reference is essential to=20 > implementing the specification, then Normative, but I'm unsure about=20= > making a publication Normative (as opposed to a standard). I actually had the feeling it=E2=80=99s essential to implement = correctly. Or alternatively maybe revise the text a bit. As long as your = have a stable reference I think it can be normative. So I thought = publications are fine... >=20 > I have fixed the pointer, we need it anyway, thanks for that. >=20 >>=20 >>=20 >> And on the shepherd write-up: >>=20 >> It=E2=80=99s indicated that not all authors have replied to the IPR = question. This >> need to be checked and respectively reflected in the shepherd = write-up >> before we can move ahead! > [acm] > If I can know who is missing, I can bug them. >=20 >>=20 >>=20 >> And some smaller technical questions/nits: >>=20 >> - Is it correct that T0 in section 4 is defined in both subsections = 4.3.5 >> and 4.4.2? > [acm] > It seems better to define T0 with the Run-time Parameters=20 > and output reporting. > So deleted in 4.3.2 (Packet Stream Generation),=20 > retained in 4.3.5 (Run-time) and 4.4.2 (output). > Same for section 5. Good! >=20 >>=20 >> - Why is an URI given (only) in section 6.1.3? > [acm] > This one avoided the deletion of all URNs, with the label URI... >=20 >> Also section 7.1.3 and 8.1.3.: http:\\www.iana.org\ ... -> I >> think this should be: https://www.iana.org/=20 > [acm] > just s/http/https/ AFAICT.=20 > http was correct at some point in this draft's life, fixed both. Good! >>=20 >>=20 >> Some more editorial comments/nits: >>=20 >> - I find it actually unnecessary or rather confusing that most (not = all) >> sections start with a sentence/paragraph explaining what the section = is >> about (e.g. "Additional (Informational) details for this entry=E2=80=9D= ). I would >> think this is sufficiently explained in = draft-ietf-ippm-metric-registry >> and does not need to be repeated here (in this already long = document). >> Also note that section 8.6 inconsistently doesn=E2=80=99t have any = content while >> 10.6. says =E2=80=9CNone.=E2=80=9D. > [acm] > I anticipated that there are many approaches to writing=20 > registry entries: one will be to simply copy an existing > entry and make changes (without ever reading the Registry=20 > RFC). What we have mostly are instructions at the Category level, > and maybe a few cases of Column-level instructions that were > left behind after deleting most of them. When I see some text > inside < >, I'll take it out if it doesn't belong. This is mostly a question of consistency as well. So please check. There = is also text that is not in pointy brackets in some section, which was = probably initially copied from the template and is not needed anymore = (and got only removed in some sections but not others). >=20 >>=20 >> - Also these comments in section 7 and 8 are probably supposed to be >> removed: >> " =E2=80=9D >> =E2=80=A6? > [acm] > That's what I'm looking for, thanks. >=20 >>=20 >> - I found this in section 10.2.2: "@@@@@ others??=E2=80=9D. I guess = there is >> something missing? Also in this part, I don=E2=80=99t think SYN and = FIN should be >> set at the same time, no? And rather than providing the Kind and = Length of >> the TSopt, I would recommend to provide a pointer to the respective = RFC. > [acm] > Yes, I've fixed all of this, thanks. Thanks! >=20 > Please let me know if you want to see diffs with the=20 > with the drafts and the current working text. No, just go ahead and submit a new version.=20 >=20 > Brian had asked some shepherding questions, > nits and other. I just replied to him and fixed the=20 > working text of -initial-registry. Yes, thanks! Mirja >=20 >>=20 >>=20 >> And finally one/two/three more general question(s) at the end, that I >> probably should also have asked already on my review for = draft-ietf-ippm- >> metric-registry: >>=20 >> Is it actually intended that basically all the text in this RFC gets >> copied into the registry? And what is expected to be on the URL page = then? >> Wouldn=E2=80=99t it be necessary to also define a format for that = page in order to >> be of any use? >>=20 >>=20 >> Mirja >>=20 >>=20 >>=20 >>=20 >=20 From nobody Mon Sep 9 01:24:43 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 84CB01200CC; Mon, 9 Sep 2019 01:24:41 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=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 tPvkwX7KAVvX; Mon, 9 Sep 2019 01:24:39 -0700 (PDT) Received: from wp513.webpack.hosteurope.de (wp513.webpack.hosteurope.de [IPv6:2a01:488:42:1000:50ed:8223::]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 410FA120046; Mon, 9 Sep 2019 01:24:39 -0700 (PDT) Received: from 200116b82c80fa001919bc0c110520fa.dip.versatel-1u1.de ([2001:16b8:2c80:fa00:1919:bc0c:1105:20fa]); authenticated by wp513.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) id 1i7EyR-0001hg-3M; Mon, 09 Sep 2019 10:24:35 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: Mirja Kuehlewind In-Reply-To: <4D7F4AD313D3FC43A053B309F97543CFA0AF4E6B@njmtexg5.research.att.com> Date: Mon, 9 Sep 2019 10:24:34 +0200 Cc: "draft-ietf-ippm-metric-registry.all@ietf.org" , IETF IPPM WG , Michelle Cotton Content-Transfer-Encoding: quoted-printable Message-Id: <045CC4BE-33B3-4485-892C-16CD4141C110@kuehlewind.net> References: <4D7F4AD313D3FC43A053B309F97543CFA0AF4E6B@njmtexg5.research.att.com> To: "MORTON, ALFRED C (AL)" X-Mailer: Apple Mail (2.3445.104.11) X-bounce-key: webpack.hosteurope.de;ietf@kuehlewind.net;1568017479;3ab03c00; X-HE-SMSGID: 1i7EyR-0001hg-3M Archived-At: Subject: Re: [ippm] AD review of draft-ietf-ippm-metric-registry-19 X-BeenThere: ippm@ietf.org 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: Mon, 09 Sep 2019 08:24:41 -0000 Hi Al, Okay to all! About the experts. How should we figure out other experts? = Do have people in mind? Should I approach them, do you want too speak to = them directly?=20 Mirja > On 8. Sep 2019, at 00:09, MORTON, ALFRED C (AL) = wrote: >=20 > Hi Mirja, > Catching-up with your comments on the registry draft. > Please see replies below, and thanks again for your review. > Al >=20 >> -----Original Message----- >> From: Mirja Kuehlewind [mailto:ietf@kuehlewind.net] >> Sent: Tuesday, August 27, 2019 9:44 AM >> To: draft-ietf-ippm-metric-registry.all@ietf.org >> Cc: IETF IPPM WG ; Michelle Cotton >> >> Subject: AD review of draft-ietf-ippm-metric-registry-19 >>=20 >> Hi all, >>=20 >> I just reviewed draft-ietf-ippm-metric-registry-19. Thanks for the = well- >> written document! I have one process question on the following part = before >> we can move ahead: >>=20 >> Sec 8.1: >> "Submission to IANA MAY be the result of IETF Standards Action, = where >> an approved Internet Draft proposes one or more Registered >> Performance Metrics to be added to the Performance Metrics = Registry, >> including the text of the proposed Registered Performance = Metric(s).=E2=80=9D >>=20 >> Maybe I=E2=80=99m confused but I would think that as soon as a = document is >> approved by the IESG, it=E2=80=99s too late for an Expert review = because an >> approved RFC that contains instruction for IANA will usually be >> implemented by IANA as approved. I believe what we usually do is to >> request the new entry before IESG evaluation and simply document in = the >> RFC that an registration was performed, or in case of e.g. the port >> registry (where however the policy is IETF Review for system ports) = we ask >> the experts for review during the IESG evaluation process and take = this as >> input for the IESG to make a decision on approval (rather than as = input >> for IANA). I=E2=80=99m cc=E2=80=99ing Michelle, as I understood that = she was already >> involved in reviewing this document, and she might have further >> insights/considerations. > [acm]=20 > I agree, here's what I changed the working text to read: >=20 > Submission to IANA MAY be during IESG review (leading to IETF=20 > Standards Action), where an Internet Draft proposes one or ... >=20 >>=20 >> Also on experts: Did the group/chairs/authors already consider = possible >> candidates? If not, is anybody of the author team willing to serve? I >> assume having 2 experts should be sufficient, right? > [acm]=20 > Yes, I assume I'll act as one of the experts, and we'll need a few = more=20 > who can share the load, especially if a quick response is required. >=20 >>=20 >> Thanks! >> Mirja >>=20 >> P.S.: Two nits: >> - sec 7.3.2: "The packet generation stream may require parameters = such as >> the the average packet rate =E2=80=A6=E2=80=9D -> two =E2=80=9Cthe=E2=80= =9D >> - sec 8.2: "why the existing entry shuold be revised=E2=80=9D -> = s/shuold/should/ > [acm]=20 > thanks, fixed. >=20 > Other Questions arose: >=20 > Sorry one more thing on references: There are two normative reference = to obsoleted RFC (RFC2141 and RFC4148). I think it would be more = appropriate to make these references informational instead. Also there = is a new Downref to RFC6248, however, I think that could also be an = informational reference instead. >=20 > [acm] > I agree, I moved 4148 and 6248 to Info, can't find 2141 in the working = text,=20 > assume I deleted it with unused references.=20 >=20 > @Bill: as the document shepherd it would be could to point out these = things in the shepherd write-up. If the authors/group decides to move = these references to informational, there is no additional action require = from you. However, if not, the write-up should be updated accordingly. >=20 > Thanks! > Mirja >=20 >=20 > Here are your questions for the registry > that came-up during review of initial contents draft: >=20 >>=20 >> And finally one/two/three more general question(s) at the end, that I >> probably should also have asked already on my review for = draft-ietf-ippm- >> metric-registry: >>=20 >> Is it actually intended that basically all the text in this RFC gets >> copied into the registry?=20 > [acm] > Sort of. All the text for each metric (section) is a file that the = registry > entry points to. Registry draft section 10.3 says: >=20 > The "URIs" column will have a URL to the full template of each = registry entry. The Registry Entry text SHALL be HTML-ized to aid the = reader, with links to reference RFCs (similar to the way that Internet = Drafts are HTML-ized, the same tool can perform the function). >=20 >> And what is expected to be on the URL page then? > [acm] > The URL points to a page =3D one section of the -ippm-initial-registry = draft. > Future URLs might point to text from a section of an RFC for a new = metric. >=20 >> Wouldn=E2=80=99t it be necessary to also define a format for that = page in order to >> be of any use? > [acm] > It's the "full template", filled-out for each registered metric. >=20 > It really helps to have the mock-up we worked-out with IANA > available to see the "running code". I'll send you the mock-up > in separate mail. We looked at this in several IPPM sessions=20 > over the years, and on this one the header is fairly up to date, > but the URLs point to "old" sections of the initial contents draft. > Also, the column widths are not ideal in the mock-up. >=20 > It might help to have a live URL to the mocked-up registry > that we can share with others (when this question comes up again, > and it will during IESG review, I assure you!). >=20 > Al From nobody Tue Sep 10 12:44:13 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 61203120273; Tue, 10 Sep 2019 12:44:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.755 X-Spam-Level: X-Spam-Status: No, score=-0.755 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 U_yXjeODjcZv; Tue, 10 Sep 2019 12:43:59 -0700 (PDT) Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C8AD4120096; Tue, 10 Sep 2019 12:43:58 -0700 (PDT) Received: by mail-lj1-x244.google.com with SMTP id q22so13103183ljj.2; Tue, 10 Sep 2019 12:43:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=5Q6FfsLHA4HaIhMIepo+v4rLPfQakHsZyQZRUhbUMKY=; b=be+Z13tpGMsb3j6EOWK6QNarhdGYAaAL7M8z9AUox6QTdza4rcdfvUSGvgliCXr/pl FasY6sHRpIUyn7C1mc/1rlGGJ0/hIMlVJvQjFGVSo1mgpQkyQbK/ayvGapK4MdsuF2Lk ioUvz1QMx5UlAZUAaHmPfif1nmWK6znW9hQGe8wg2npKuY3iL18//CBTktgffYCIpUYz Gl1v8yetCPDX8HYVFMz/n6l9J1HutwdW71eu0A9pLG1clfLeYrUV3qgflo1oA85ELzc5 iDj3788bRw0l4lpL6OMt9iVgh9WoDHcbAQbTiL/d74lP6IK1c4SIPPeBBgfBRQMsLm5b +x9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=5Q6FfsLHA4HaIhMIepo+v4rLPfQakHsZyQZRUhbUMKY=; b=XnUd33erZwhR8WXJzUy7RDXVjwBDKbJuU8o0HTG3T8xD6JMfKfsmHQmG6INUWRov6m BypswHVSKZ/GFIu4el0YF46CUFiYixasfmqxCMaCf5bmjSa8fiwDsMoDaUOUpzqpoThA 9nIRFrYAOqSXrq7ZWO2QDrenZiJoWz67UmOgjUDdJvOdDnszDnQAYQTbRZOcts7w9hF9 clZR/Gx7szqtxzrtf7jXrwhFDhNA5K6yi3NHNagbh3h4/NqN9KgKGdHonLDlpmCMMI/o +HJyfYbFBZCpcu/dBBVDMmOqC0Ig/ze4XxHJuI13LJ3d9p1t/kCjbIDeuMAjkE6y8HSW OR3w== X-Gm-Message-State: APjAAAWIs/3OA4MSzj6SLTBJmRfWyr2sDAvofGkt/GNgGUg1DG8sR60j JPwwIvDpIRJv9drAo8spK035c5JJ/Wo+OUhDypU= X-Google-Smtp-Source: APXvYqxfakd7Zc9IG46R7RNmDcBd1RTSFQqhSeiBcvpUqLLMDlK88JqNZK3piDSdU0yJm14dXa7IlN6kCNiY2I7xUO8= X-Received: by 2002:a2e:9006:: with SMTP id h6mr492576ljg.42.1568144636991; Tue, 10 Sep 2019 12:43:56 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> In-Reply-To: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Tue, 10 Sep 2019 12:43:45 -0700 Message-ID: To: Magnus Westerlund Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/alternative; boundary="0000000000000b5b990592382022" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Tue, 10 Sep 2019 19:44:03 -0000 --0000000000000b5b990592382022 Content-Type: text/plain; charset="UTF-8" Hi Magnus, thank you for the review and thoughtful, pointed questions. Please find my answers in-line under GIM>> tag. Regards, Greg On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker < noreply@ietf.org> wrote: > Magnus Westerlund has entered the following ballot position for > draft-ietf-ippm-stamp-07: Discuss > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- > > Two very much discussing discusses. However, I would really like to hear > the > answer to these concerns before clearing. > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If there > ever > would exist a need to deploy another integrity solution, even if the actual > algorithm used to construct the tag can be agreed by the management, there > appear to exist a hard look in to use 16-byte tags. Have this issue been > considered? > GIM>> Indeed, this specification defines the use of only one algorithm and only 16 bytes-long HMAC field. Your question prompted the discussion among authors and we believe that in a future specification it would be feasible to extend supporting a number of algorithms and different lengths of HMAC field both being defined through extension to STAMP YANG data model. > > 2. Section 6: > The possible impact of the > STAMP test packets on the network MUST be thoroughly analyzed, and > the use of STAMP for each case MUST be agreed by all users on the > network before starting the STAMP test session. > > I assume some potential issues are know, shouldn't they really be > listed here in the security consideration to further motivate why > the > analysis needs to happen. > GIM>> This is in reference to using numbers from the User range as the destination port number. Would adding the reference to the case of using the port numbers from the User range address your concern? Or rather refer to Section 4, as it includes more discussion (see below)? > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > 1. Section 4: > Before using numbers from the User Ports range, the possible impact > on the network MUST be carefully studied and agreed by all users of > the network. > > Is the above sentence missing to list an important assumption? Is > the > assumption that by using the registred destination port an operator > that sees to much STAMP traffic can simply filter it out and that > way > deal with the traffic, something which is not possible when using > an > locally decided port? If that is the case, this assumption should > probably be noted. > GIM>> That is a very good point but our primary motivation for this cautionary note (or strong warning) was that by allowing STAMP to use port numbers from the User range, ports that may be already assigned to protocols, creates a DDOS attack vector. As for the filtering STAMP traffic out, I think that even if the destination port is one from the Dynamic range, for a relatively long test session it can be filtered out. > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? Is that a > measurment session between one specific and sender and a specific > reflector for a time duration? The defenition of the session do > matter > if one intended to enable a single sender to use multiple > reflectors, > and if that can be a single session or always multiple indepdendent > ones. Would appreciate a definition what a session is. If it is > possible to send STAMP traffic using a multicast or broadcast > address > should be made explicit. > GIM>> Your interpretation is correct, STAMP session is implicitly defined as p2p. And that is what reflected in the STAMP YANG model. Would the following text make it clearer: NEW TEXT: In this document, a measurement session also referred to as STAMP session, is the session between one specific Session-Sender and one particular Session-Reflector for a time duration. > > 3. Section 4.1.1.: > Timestamp is eight octets long field. STAMP node MUST support > Network Time Protocol (NTP) version 4 64-bit timestamp format > [RFC5905], the format used in [RFC5357]. STAMP node MAY support > IEEE 1588v2 Precision Time Protocol truncated 64-bit timestamp > format [IEEE.1588.2008], the format used in [RFC8186]. > > Is the clock source here something that may be relevant or simply > information the management functions should capture. I think there > is a > similar issue to that of RTP faced when it comes to understand > what the > timestamp actually represent and thus be used correctly. RTP clock > source specification is RFC 7273 > (https://datatracker.ietf.org/doc/rfc7273/) > GIM>> NTP and PTP encodings have a different interpretation of the Fraction field of the Timestamp field. In my experience, PTP format is native for the data plane, while NTP is more used at the control plane. Original extension to TWAMP has been described in RFC 8186 . > > 4. Section 4.1: > Because STAMP supports symmetrical test packets, STAMP > Session-Sender > packet has a minimum size of 44 octets in unauthenticated mode, see > Figure 2, and 112 octets in the authenticated mode, see Figure 4. > > The above text implies some potential for UDP payload size > variability > for the STAMP packets. However, the actual definition appear to > have > fixed sizes. Can you please clarify if I have missed something that > enables the STAMP packet to have variable size? > GIM>> I think that the text can be improved by characterizing the listed sizes as "base". The variable length of a test packet in STAMP is supported by using Extra Padding TLV defined in draft-ietf-ippm-stamp-option-tlv . Below is the proposed update: OLD TEXT: Because STAMP supports symmetrical test packets, STAMP Session-Sender packet has a minimum size of 44 octets in unauthenticated mode, see Figure 2, and 112 octets in the authenticated mode, see Figure 4. NEW TEXT: STAMP supports symmetrical test packets. The base STAMP Session- Sender packet has a minimum size of 44 octets in unauthenticated mode, see Figure 2, and 112 octets in the authenticated mode, see Figure 4. The variable length of a test packet in STAMP is supported by using Extra Padding TLV defined in [I-D.ietf-ippm-stamp-option-tlv]. With the new reference, should I-D.ietf-ippm-stamp-option-tlv be moved to the Normative References list or may remain in the Informative list? --0000000000000b5b990592382022 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Magnus,
thank you for the review a= nd thoughtful, pointed questions. Please find my answers in-line under GIM&= gt;> tag.

Regards,
Greg
On Wed, = Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker <noreply@ietf.org> wrote:
=
Magnus Westerlund h= as entered the following ballot position for
draft-ietf-ippm-stamp-07: Discuss

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/s= tatement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-i= ppm-stamp/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

Two very much discussing discusses. However, I would really like to hear th= e
answer to these concerns before clearing.

1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If there eve= r
would exist a need to deploy another integrity solution, even if the actual=
algorithm used to construct the tag can be agreed by the management, there<= br> appear to exist a hard look in to use 16-byte tags. Have this issue been considered?
GIM>> Indeed, this specification def= ines the use of only one algorithm and only 16 bytes-long HMAC field. Your = question prompted the discussion among authors and we believe that in a fut= ure specification it would be feasible to extend supporting a number of alg= orithms and different lengths of HMAC field both being defined through exte= nsion to STAMP YANG data model.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 2. Section 6:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 The possible impact of the
=C2=A0 =C2=A0STAMP test packets on the network MUST be thoroughly analyzed,= and
=C2=A0 =C2=A0the use of STAMP for each case MUST be agreed by all users on = the
=C2=A0 =C2=A0network before starting the STAMP test session.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 I assume some potential issues are know, should= n't they really be
=C2=A0 =C2=A0 =C2=A0 =C2=A0 listed here in the security consideration to fu= rther motivate why the
=C2=A0 =C2=A0 =C2=A0 =C2=A0 analysis needs to happen.
= GIM>> This is in reference to using numbers from the User range as th= e destination port number. Would adding the reference to the case of using = the port numbers from the User range address your concern? Or rather refer = to Section 4, as it includes more discussion (see below)?=C2=A0


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

=C2=A0 =C2=A0 =C2=A0 =C2=A0 1. Section 4:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Before using numbers from the User Ports range,= the possible impact
=C2=A0 =C2=A0on the network MUST be carefully studied and agreed by all use= rs of
=C2=A0 =C2=A0the network.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 Is the above sentence missing to list an import= ant assumption? Is the
=C2=A0 =C2=A0 =C2=A0 =C2=A0 assumption that by using the registred destinat= ion port an operator
=C2=A0 =C2=A0 =C2=A0 =C2=A0 that sees to much STAMP traffic can simply filt= er it out and that way
=C2=A0 =C2=A0 =C2=A0 =C2=A0 deal with the traffic, something which is not p= ossible when using an
=C2=A0 =C2=A0 =C2=A0 =C2=A0 locally decided port? If that is the case, this= assumption should
=C2=A0 =C2=A0 =C2=A0 =C2=A0 probably be noted.
GIM>= > That is a very good point but our primary motivation for this cautiona= ry note (or strong warning) was that by allowing STAMP to use port numbers = from the User range, ports that may be already assigned to protocols, creat= es a DDOS attack vector. As for the filtering STAMP traffic out, I think th= at even if the destination port is one from the Dynamic range, for a relati= vely long test session it can be filtered out.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 2. Section 3 and 4, and 4.1.1: What is a STAMP = Session? Is that a
=C2=A0 =C2=A0 =C2=A0 =C2=A0 measurment session between one specific and sen= der and a specific
=C2=A0 =C2=A0 =C2=A0 =C2=A0 reflector for a time duration?=C2=A0 The defeni= tion of the session do matter
=C2=A0 =C2=A0 =C2=A0 =C2=A0 if one intended to enable a single sender to us= e multiple reflectors,
=C2=A0 =C2=A0 =C2=A0 =C2=A0 and if that can be a single session or always m= ultiple indepdendent
=C2=A0 =C2=A0 =C2=A0 =C2=A0 ones. Would appreciate a definition what a sess= ion is. If it is
=C2=A0 =C2=A0 =C2=A0 =C2=A0 possible to send STAMP traffic using a multicas= t or broadcast address
=C2=A0 =C2=A0 =C2=A0 =C2=A0 should be made explicit.
G= IM>> Your interpretation is correct, STAMP session is implicitly defi= ned as p2p. And that is what reflected in the STAMP YANG model. Would the f= ollowing text make it clearer:
NEW TEXT:
=C2=A0 =C2=A0I= n this document, a measurement session also referred to as
=C2=A0 =C2=A0= STAMP session, is the session between one specific Session-Sender and
= =C2=A0 =C2=A0one particular Session-Reflector for a time duration.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 3.=C2=A0 Section 4.1.1.:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Timestamp is eight octets long field.=C2=A0 STA= MP node MUST support
=C2=A0 =C2=A0 =C2=A0 Network Time Protocol (NTP) version 4 64-bit timestamp= format
=C2=A0 =C2=A0 =C2=A0 [RFC5905], the format used in [RFC5357].=C2=A0 STAMP n= ode MAY support
=C2=A0 =C2=A0 =C2=A0 IEEE 1588v2 Precision Time Protocol truncated 64-bit t= imestamp
=C2=A0 =C2=A0 =C2=A0 format [IEEE.1588.2008], the format used in [RFC8186].=

=C2=A0 =C2=A0 =C2=A0 =C2=A0 Is the clock source here something that may be = relevant or simply
=C2=A0 =C2=A0 =C2=A0 =C2=A0 information the management functions should cap= ture. I think there is a
=C2=A0 =C2=A0 =C2=A0 =C2=A0 similar issue to that of RTP faced when it come= s to understand what the
=C2=A0 =C2=A0 =C2=A0 =C2=A0 timestamp actually represent and thus be used c= orrectly. RTP clock
=C2=A0 =C2=A0 =C2=A0 =C2=A0 source specification is RFC 7273
=C2=A0 =C2=A0 =C2=A0 =C2=A0 (https://datatracker.ietf.org/d= oc/rfc7273/)
GIM>> NTP and PTP encodings hav= e a different interpretation of the Fraction field of the Timestamp field. = In my experience, PTP format is native for the data plane, while NTP is mor= e used at the control plane. Original extension to TWAMP has been described= in RFC 8186.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 4. Section 4.1:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Because STAMP supports symmetrical= test packets, STAMP Session-Sender
=C2=A0 =C2=A0packet has a minimum size of 44 octets in unauthenticated mode= , see
=C2=A0 =C2=A0Figure 2, and 112 octets in the authenticated mode, see Figure= 4.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 The above text implies some potential for UDP p= ayload size variability
=C2=A0 =C2=A0 =C2=A0 =C2=A0 for the STAMP packets. However, the actual defi= nition appear to have
=C2=A0 =C2=A0 =C2=A0 =C2=A0 fixed sizes. Can you please clarify if I have m= issed something that
=C2=A0 =C2=A0 =C2=A0 =C2=A0 enables the STAMP packet to have variable size?=
GIM>> I think that the text can be improved by = characterizing the listed sizes as "base". The variable length of= a test packet in STAMP is supported by using Extra Padding TLV defined in = draft-ietf-ippm-stamp-option-tlv. Below is the pr= oposed update:
OLD TEXT:
=C2=A0 =C2=A0Because STAMP sup= ports symmetrical test packets, STAMP Session-Sender
=C2=A0 =C2=A0packet= has a minimum size of 44 octets in unauthenticated mode, see
=C2=A0 =C2= =A0Figure 2, and 112 octets in the authenticated mode, see Figure 4.
NEW TEXT:
=C2=A0 =C2=A0STAMP supports symmetrical test pa= ckets.=C2=A0 The base STAMP Session-
=C2=A0 =C2=A0Sender packet has a mi= nimum size of 44 octets in unauthenticated
=C2=A0 =C2=A0mode, see Figure= 2, and 112 octets in the authenticated mode, see
=C2=A0 =C2=A0Figure 4.= =C2=A0 The variable length of a test packet in STAMP is supported
=C2=A0= =C2=A0by using Extra Padding TLV defined in
=C2=A0 =C2=A0[I-D.ietf-ippm= -stamp-option-tlv].

With the new reference, sh= ould I-D.ietf-ippm-stamp-option-tlv be moved to the Normative References li= st or may remain in the Informative list?
--0000000000000b5b990592382022-- From nobody Tue Sep 10 14:01:15 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D91F21200A1; Tue, 10 Sep 2019 14:01:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 5gB7aE8Fboy4; Tue, 10 Sep 2019 14:01:11 -0700 (PDT) Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3BCEA12022A; Tue, 10 Sep 2019 14:01:11 -0700 (PDT) Received: by mail-lf1-x12e.google.com with SMTP id u13so14605557lfm.9; Tue, 10 Sep 2019 14:01:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=QdGvaNzBbIjjuifBUxPgwTW345VSR1mU46dMouTDjhU=; b=MN50a6RP4IsY5knkqLndOE4aEk2c7cnp575vS10R7AH+iLe7swVPTPbdipb9InbXy/ T7SRpbDyhT0EWVkv0ZxUXQtzghgLqk2ILYA9Chnr4pwTkm6uc7vIJDUeKNPhLFZhnTNC XR27u4qefi3x8Q8Y8FTa/OCSUdSslMMMmlOVss4w7/Ze0mpQqLMXvuuNQt/DoyuS6tGo sf4Pk2J+BXjL+a3Dkly11wRKyRhL4Um0hvHjt0TIdB67MWn8lhjFrZ7/29uM8rr7q/W8 Fr6fZNjN170QvBR2MlXQn/7IbiLEKn4bg7EThHvJFFhsKnl6sJGYsmwgyUfCQP++3TUE knRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=QdGvaNzBbIjjuifBUxPgwTW345VSR1mU46dMouTDjhU=; b=IociB7lz6B4QRgHk8Ya92f8Q9UNCqbenP8QEMrh6m88qC/4mfI9hdQJymW9EIV1LzQ pg34s8nGYN6A0kRhQOJ9egW2fLNbL6bCdqw9Mcccu4eZEYKOPMXol6zk5VdD0i38g6bG JKUmopbyg7Q2WRDi3E9FE7QDHbgkebZtUsJgJmU9e9jK4jH4HA8nSWXLAFPfFj6dgaWD YrFgeP5JoLXCRBNDveSJov3b/V0sEmcPxJbb4+P+1MBdmwW0skfMtZP905PI70yLfper P3t0mcegSt2a0/MbiWYYWBry0KQpYXfKBdqrASmKDS89cY+LSmJ1Tn5oBfa7N+G645tj +HOA== X-Gm-Message-State: APjAAAXRG2YCAb4fi8taAg2N8FApYRhq7H+J6AZ8++LyNEPbhqYLgSE/ BffirL7f48Evc7vjAIiaAmYLoAplPwwBpQLtY3s= X-Google-Smtp-Source: APXvYqw7JdUk08WtK7PvdwBNAeWxqTzjuj7UQIZ1LywhyRJcSKgsW0nwcxs6svyRNBlmkOCcJdsR+t48qKyt1/A4Tc0= X-Received: by 2002:ac2:5485:: with SMTP id t5mr15564387lfk.27.1568149269361; Tue, 10 Sep 2019 14:01:09 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Tue, 10 Sep 2019 14:00:57 -0700 Message-ID: To: Barry Leiba Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/alternative; boundary="00000000000027b91a05923934cf" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Tue, 10 Sep 2019 21:01:14 -0000 --00000000000027b91a05923934cf Content-Type: text/plain; charset="UTF-8" Hi Barry, thank you for your pointed question. Please find my explanation and the proposed updated below under the GIM>> tag. Regards, Greg On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker wrote: > Barry Leiba has entered the following ballot position for > draft-ietf-ippm-stamp-07: Discuss > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- > > I'm sure this will be easy to either explain to me or re-phrase: > > Sections 4 and 6 both say something like "MUST be agreed by all users of > the > network". What does that really mean? How is it remotely possible to get > agreement from all users of your network? How is it remotely possible that > they could understand what you're asking them to agree to? > GIM>> Yes, looking at the bigger picture, at the Internet rather than only at the domain where the test will be performed makes such condition unattainable. Would s/network/network domain where the test is planned/ so that it reads as: ... MUST be agreed by all users on the network domain where the test is planned ... make it clearer and the number of parties involved reasonable, practical? As for what the could be the question users will be asked, I think that it should verify whether the application that has the port number assigned is active as the same number will be used as the destination port number in the STAMP test. --00000000000027b91a05923934cf Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Barry,
thank you for your pointed = question. Please find my explanation and the proposed updated below under t= he GIM>> tag.

Regards,
Greg
<= /div>
O= n Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker <noreply@ietf.org> wrote:
Barry Leiba has entered the followin= g ballot position for
draft-ietf-ippm-stamp-07: Discuss

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/s= tatement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-i= ppm-stamp/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

I'm sure this will be easy to either explain to me or re-phrase:

Sections 4 and 6 both say something like "MUST be agreed by all users = of the
network".=C2=A0 What does that really mean?=C2=A0 How is it remotely p= ossible to get
agreement from all users of your network?=C2=A0 How is it remotely possible= that
they could understand what you're asking them to agree to?

GIM>> Yes, looking at the bigger picture, at = the Internet rather than only at the domain where the test will be performe= d makes such condition unattainable. Would s/network/network domain where t= he test is planned/=C2=A0 so that it reads as:
.= .. MUST be agreed by all users on the network domain where the test is plan= ned ...
make it clearer a= nd the number of parties involved reasonable, practical?
As for w= hat the could be the question users will be asked, I think that it should v= erify whether the application that has the port number assigned is active a= s the same number will be used as the destination port number in the STAMP = test.
--00000000000027b91a05923934cf-- From nobody Tue Sep 10 16:36:53 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EA33B120026; Tue, 10 Sep 2019 16:36:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 ksNvPmFYO7CM; Tue, 10 Sep 2019 16:36:50 -0700 (PDT) Received: from mail-lj1-x231.google.com (mail-lj1-x231.google.com [IPv6:2a00:1450:4864:20::231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BBD0E120013; Tue, 10 Sep 2019 16:36:49 -0700 (PDT) Received: by mail-lj1-x231.google.com with SMTP id y5so7336584lji.4; Tue, 10 Sep 2019 16:36:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=06/wqBuhwuMXjQRQiCHSRitx4dp75B799gIYBRAsfwE=; b=YG6vB9riw1lTsF8FGdEjGUPEaUkR2ySovKOMO+HM6HKQgy9imTx6b/9cQMaB2Ct8su D/wuw/UTyMvDOT3qMA/FsRd/Izdx+eBEaFfpDCKtSsqPtaijKzgYN6nNdEeVysHtVo+O Zvpm8PbrK8tsQAS+NmX3vUNmhGM9hssPs8rUBIcGxInAK/sRvGQVy/+6au+v28VT5Ii/ e1wr8kZStR8Zxj9mzmOz9/mgJkdFNmib0hX0LbNb/HBUsgF+MYBJHiQs3aOZW4OUxA4B /LkqCILZ4iXBJutjZ/e1ABaM6NqBToreGOp41G65oZQa5ZNVzv/B3LJt0LobUAl838j+ WyHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=06/wqBuhwuMXjQRQiCHSRitx4dp75B799gIYBRAsfwE=; b=nd0X2VCzZJldP+vByctDHN6EyfgPhVzExm47Hx2RmOPoHJt+Rdxn3ZCmMvayl1Wl/V D5X1ORT+ZVNUphsX67kbT+GnWAt6SVWCOX/FH3vQmLJniJJIVdwF3u0AjVusGBaMCiZA T3+hOuF6ks87Lo5cA53v57HEkDveP+Bv6fZr2IuIKOBnSzilfAsuBi5FO/7VTzo0E5OE 4/8Mf7j3YvGJ3hCBLOTPj2Ke87NHofp+Vcfa/3RRmrcZPRDAWk9nK/eTyZEkYNY1ui40 V6zlfvrvfBM0vVnMhuMzwniqJbBBxerOnfJzuUV4MfZOuI/m3GBq1sfevTALtG/WrXfh ZGOA== X-Gm-Message-State: APjAAAX0oMqFkpsQ2aI66k3GkcAExTVvTLBpzCkXHktnm/jUu2X+SZBk 4yQV+wnuIV0NKHQGByByB+w0rgsgkt/txFNtxU4= X-Google-Smtp-Source: APXvYqwvuQHgZxlyBB3IK3YoiD1xeBNRrgm03MragZrdCPr34HXJTtUJ0mus0alLrfEq4NgMReJwAoMe1VExNtGm6ZM= X-Received: by 2002:a2e:3201:: with SMTP id y1mr18026600ljy.177.1568158607965; Tue, 10 Sep 2019 16:36:47 -0700 (PDT) MIME-Version: 1.0 References: <156769231672.22739.6443411633239129567.idtracker@ietfa.amsl.com> In-Reply-To: <156769231672.22739.6443411633239129567.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Tue, 10 Sep 2019 16:36:36 -0700 Message-ID: To: Martin Vigoureux Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/alternative; boundary="000000000000c7826605923b601f" Archived-At: Subject: Re: [ippm] Martin Vigoureux's No Objection on draft-ietf-ippm-stamp-07: (with COMMENT) X-BeenThere: ippm@ietf.org 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: Tue, 10 Sep 2019 23:36:52 -0000 --000000000000c7826605923b601f Content-Type: text/plain; charset="UTF-8" Hi Martin, thank you for your comments and questions. Will follow on to address Barry's DISCUSS on another thread. In this reply, please find answers to your comments in-line tagged GIM>>. Regards, Greg On Thu, Sep 5, 2019 at 7:05 AM Martin Vigoureux via Datatracker < noreply@ietf.org> wrote: > Martin Vigoureux has entered the following ballot position for > draft-ietf-ippm-stamp-07: No Objection > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > I support Barry's DISCUSS. > > Also a few points are not clear: > > o Stateless - STAMP Session-Reflector does not maintain test state > and will reflect the received sequence number without > modification. > This is not the only thing that the reflector reflects, right? > GIM>> Correct. A Session-Reflector reflects all the information received in a test packet as well as the value of TTL/Hop Count field. To clarify how the Stateless mode is different from the Stateful propose the following update: OLD TEXT: Stateless - STAMP Session-Reflector does not maintain test state and will reflect the received sequence number without modification. NEW TEXT: Stateless - STAMP Session-Reflector does not maintain test state and will use the value in the Sequence Number field in the recieved packet as the value for the Sequence Number field in the reflected packet. As a result, values in Sequence Number and Session-Sender Sequence Number fields are the same, and only round-trip packet loss can be calculated while the reflector is operating in stateless mode. > > The STAMP Session-Sender and Session-Reflector MAY use, not use, > or set value of the Z field in accordance with the timestamp > format in use. This optional field is to enhance operations, but > local configuration or defaults could be used in its place. > What do you mean by "use"and how does that differ from "set"? > GIM>> Yes, it's awkward. We propose the following update: OLD TEXT: The STAMP Session-Sender and Session-Reflector MAY use, not use, or set value of the Z field in accordance with the timestamp format in use. This optional field is to enhance operations, but local configuration or defaults could be used in its place. NEW TEXT: The STAMP Session-Sender and Session-Reflector MUST use a Z field value of 0, (NTP 64 bit format of a timestamp) as the default. The STAMP Session-Sender and Session-Reflector MAY optionally set the Z field to a value of 1 (PTPv2 truncated format of a timestamp). Also the fact that it is described as optional here but as "MUST/SHOULD be > set > to NTP" in interop with TWAMP light is confusing. > GIM>> Thank you for pointing to these two references. After reviewing them, we've concluded that the first is in fact unnecessary because only the Session-Sender uses timestamp and must be aware of its format. Hence, in the case when a Session-Reflector supports TWAMP-Light, STAMP Session-Sender can use any format. Will remove these two sentences: The Session-Sender SHOULD use the default format for its timestamps - NTP. And it MAY use PTPv2 timestamp format. The second reference to the Z flag in the section: The Session-Reflector MUST be set to use the default format for its timestamps, NTP. is in sync with the proposed above update. Would these changes address your concern? --000000000000c7826605923b601f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Martin,
thank you for your comment= s and questions. Will follow on to address Barry's DISCUSS on another t= hread. In this reply, please find answers to your comments in-line tagged G= IM>>.

Regards,
Greg
On Thu, S= ep 5, 2019 at 7:05 AM Martin Vigoureux via Datatracker <noreply@ietf.org> wrote:
Martin Vigoureux has entered the follow= ing ballot position for
draft-ietf-ippm-stamp-07: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/s= tatement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-i= ppm-stamp/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

I support Barry's DISCUSS.

Also a few points are not clear:

=C2=A0 =C2=A0o=C2=A0 Stateless - STAMP Session-Reflector does not maintain = test state
=C2=A0 =C2=A0 =C2=A0 and will reflect the received sequence number without<= br> =C2=A0 =C2=A0 =C2=A0 modification.
This is not the only thing that the reflector reflects, right?
GIM>> Correct. A Session-Reflector reflects all the informat= ion received in a test packet as well as the value of TTL/Hop Count field. = To clarify how the Stateless mode is different from the Stateful propose th= e following update:
OLD TEXT:
=C2=A0 =C2=A0 =C2=A0 Stat= eless - STAMP Session-Reflector does not maintain test state
=C2=A0 = =C2=A0 =C2=A0 and will reflect the received sequence number without
=C2= =A0 =C2=A0 =C2=A0 modification.
NEW TEXT:
=C2=A0 =C2=A0 =C2=A0 Stateless - STAMP Sessi= on-Reflector does not maintain test state
=C2=A0 =C2=A0 =C2=A0 and will = use the value in the Sequence Number field in the
=C2=A0 =C2=A0 =C2=A0 r= ecieved packet as the value for the Sequence Number field in the
=C2=A0 = =C2=A0 =C2=A0 reflected packet.=C2=A0 As a result, values in Sequence Numbe= r and
=C2=A0 =C2=A0 =C2=A0 Session-Sender Sequence Number fields are the= same, and only
=C2=A0 =C2=A0 =C2=A0 round-trip packet loss can be calcu= lated while the reflector is
=C2=A0 =C2=A0 =C2=A0 operating in stateless= mode.

=C2=A0 =C2=A0 =C2=A0 The STAMP Session-Sender and Session-Reflector MAY use= , not use,
=C2=A0 =C2=A0 =C2=A0 or set value of the Z field in accordance with the tim= estamp
=C2=A0 =C2=A0 =C2=A0 format in use.=C2=A0 This optional field is to enhance= operations, but
=C2=A0 =C2=A0 =C2=A0 local configuration or defaults could be used in its p= lace.
What do you mean by "use"and how does that differ from "set&= quot;?
GIM>> Yes, it's awkward. We propose t= he following update:
OLD TEXT:
=C2=A0 =C2=A0 =C2=A0 The STAM= P Session-Sender and Session-Reflector MAY use, not use,
=C2=A0 =C2=A0 = =C2=A0 or set value of the Z field in accordance with the timestamp
=C2= =A0 =C2=A0 =C2=A0 format in use.=C2=A0 This optional field is to enhance op= erations, but
=C2=A0 =C2=A0 =C2=A0 local configuration or defaults = could be used in its place.=C2=A0=C2=A0
NEW TEXT:
=C2= =A0 =C2=A0 =C2=A0 The STAMP Session-Sender and Session-Reflector MUST use a= Z field
=C2=A0 =C2=A0 =C2=A0 value of 0, (NTP 64 bit format of a timest= amp) as the default.
=C2=A0 =C2=A0 =C2=A0 The STAMP Session-Sender and S= ession-Reflector MAY optionally set
=C2=A0 =C2=A0 =C2=A0 the Z field to = a value of 1 (PTPv2 truncated format of a
=C2=A0 =C2=A0 =C2=A0 timestamp= ).

The second reference to the Z flag in the section:<= /div>
=C2=A0 =C2=A0The Session-Reflector MUST be = set to use the default format
=C2=A0 =C2=A0for its timestamps, NTP.
<= /div>
is in sync with the proposed above update.<= /div>
Would these changes address your concern?
--000000000000c7826605923b601f-- From nobody Tue Sep 10 17:15:31 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6052E12007A; Tue, 10 Sep 2019 17:15:21 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.922 X-Spam-Level: X-Spam-Status: No, score=-1.922 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.026, SPF_HELO_NONE=0.001, SPF_PASS=-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 IdgmLB8QowOg; Tue, 10 Sep 2019 17:15:19 -0700 (PDT) Received: from mail-io1-f42.google.com (mail-io1-f42.google.com [209.85.166.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 299CB12006B; Tue, 10 Sep 2019 17:15:19 -0700 (PDT) Received: by mail-io1-f42.google.com with SMTP id r26so41670202ioh.8; Tue, 10 Sep 2019 17:15:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=FCgiBm1hhwMgu0m3rdBwNSq3f/4U+M06cOSYBJhLyao=; b=Jvh5l60bqKCIXWNJCp+yzpPe2O2HG3Zk7DSTNYUkDP/RHUNwnRQfaOCUDE9aunGSQW AGkXkcbf9yyuk+IALvikIU4m7Yojz3mpy74u8+1EciHE0eJumAQeZS85rPPObHvFPjCV Z4YoMA5A+nLWHHOhehA8LIiv12hRFmrFPLBIaCrqcfR+DbmHVko6qg5tJuzRtGPqNmxB t8lReccgyVuwLPvoWnDEkgLm8yTHgARx8QbqJyVC+xQeN/FfrQcDrkTlEQsyvGI052G5 9tfS0pryKM/i4NYuAbn05wtlXTP+n1NnAKPvuJcPd5quFycNdO1ihOWZGh+uhj5RzRwy +LAg== X-Gm-Message-State: APjAAAXWEUA9rosDn8Tp6AJeU4OPdrOHJWGdOHm4sr2HJYzWmex5nAJv mp0P6C3WQgloMTe4ZlPsj6mi9y0bpKXrcL+mvXw= X-Google-Smtp-Source: APXvYqwbaiNZXA33AVGeP1tPlNgbhlRbILERkCd8lmNG4M+1WrUwdZEjfXK0GGQpxHfpxupoX5/bFzF1tnpkLIeTGP0= X-Received: by 2002:a02:c558:: with SMTP id g24mr25050049jaj.140.1568160918143; Tue, 10 Sep 2019 17:15:18 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Barry Leiba Date: Tue, 10 Sep 2019 20:15:07 -0400 Message-ID: To: Greg Mirsky Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: text/plain; charset="UTF-8" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 00:15:22 -0000 Hi, Greg, and thanks for the response. I think a minor rephrasing of the requirement isn't enough, really. As I understand it now, after other discussion, it's not that you need agreement from the users, but that you should put a paragraph (or maybe a separate section, to highlight the point) that says that this is not intended for use on the open Internet nor on production networks, and gives examples of what it *is* intended for... perhaps test networks, production networks during advertised maintenance windows, that sort of thing. And then you don't need to say that the network's users need to agree, but simply that they need to be aware that performance testing will be happening during period X, and that disruptions to normal network operation are possible. You'd need to come up with text that the working group agrees with, of course, but I think that if you do it will address my concern as well as some of the others that were raised. Does that make sense? Barry On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky wrote: > > Hi Barry, > thank you for your pointed question. Please find my explanation and the proposed updated below under the GIM>> tag. > > Regards, > Greg > > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker wrote: >> >> Barry Leiba has entered the following ballot position for >> draft-ietf-ippm-stamp-07: Discuss >> >> When responding, please keep the subject line intact and reply to all >> email addresses included in the To and CC lines. (Feel free to cut this >> introductory paragraph, however.) >> >> >> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html >> for more information about IESG DISCUSS and COMMENT positions. >> >> >> The document, along with other ballot positions, can be found here: >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ >> >> >> >> ---------------------------------------------------------------------- >> DISCUSS: >> ---------------------------------------------------------------------- >> >> I'm sure this will be easy to either explain to me or re-phrase: >> >> Sections 4 and 6 both say something like "MUST be agreed by all users of the >> network". What does that really mean? How is it remotely possible to get >> agreement from all users of your network? How is it remotely possible that >> they could understand what you're asking them to agree to? > > > GIM>> Yes, looking at the bigger picture, at the Internet rather than only at the domain where the test will be performed makes such condition unattainable. Would s/network/network domain where the test is planned/ so that it reads as: > > ... MUST be agreed by all users on the network domain where the test is planned ... > > make it clearer and the number of parties involved reasonable, practical? > As for what the could be the question users will be asked, I think that it should verify whether the application that has the port number assigned is active as the same number will be used as the destination port number in the STAMP test. From nobody Tue Sep 10 17:34:56 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 37512120013; Tue, 10 Sep 2019 17:34:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 N_PKHPFTcKl2; Tue, 10 Sep 2019 17:34:51 -0700 (PDT) Received: from mail-lj1-x235.google.com (mail-lj1-x235.google.com [IPv6:2a00:1450:4864:20::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3E72F12007A; Tue, 10 Sep 2019 17:34:51 -0700 (PDT) Received: by mail-lj1-x235.google.com with SMTP id y23so18221959lje.9; Tue, 10 Sep 2019 17:34:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=X5ZvAWiM86BHwK84UqWQjDGp/riCSFDJCeA9XUK0JJk=; b=YY7aQyQ2oL8TPkteTqcBKIvLgiEqqTxdescM/9MxtYa++l69T1pYwhdnpYdulkE45Q ZWf8dfcPbwz2oGXX9eVBnA5r/Z/zajnkcPMhxkFliYc8pF0GvGs1EKbUxW0muAfhPrd9 l+Zt79791NVZ5WA9YCwNJR1pL+PbUhlJIJGrEGCMh88fGnQkrezsQUVSd/Fr9mlbQpFv +Ghto9Bvp4eBZG6CM1dAOOL9oh9XkEGB68yVXDnzFNFuR9wXgSBH+xooekqkhu9gSb2P oUh64gUqolCd1xOdU2VGbfwN+YgKXJ4wAgVRUzDEY7UPpD4EbP/fe7TUvock5ia8AoC2 rsSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=X5ZvAWiM86BHwK84UqWQjDGp/riCSFDJCeA9XUK0JJk=; b=GbgOY+j9nzbPP4SSlJesGx8zCiguWkUQoI14wA5taMpepSFz3HnlSbJo8c749Y6YTD oAyi97ikLeLXXGsa8y4EIyQO+Z1Cm9gtI/TDWm1rxci3SrpFkiI0i1qug8sb4EefPtLT ATsjf6ifcn3HK7/xm51rNfV8sZnRHAYnbCfxwZcKumsTL0siMujt23T4GgIPvFkpUECq ogAMGBdPni/8Wl4imTcrGG8y3QWWmZLVR8lJhPP+AugrzvlyOrg8mMz+aABNu4rqPr2t 87MreXrB6jCWIDiUaaSYzsdo+fK53MFH6aOkNtLPYAXcHXoz5iL6lf+sO2pJ8VcFcZSO frzw== X-Gm-Message-State: APjAAAWX5G+hzaHKdeFltbllDZ2kLJt2JLM6g3lOkPTWpxOuCKwu01ix gdlndOVeNwUJbPiuvpOLP83oUG5+Y+9uQb81oWc= X-Google-Smtp-Source: APXvYqxYu9mcx5nb8H7wTOPnbhzXOXC63yFb9+G81mQ0ayYY2yNhjiVZ6kJXz/t8GrWzkaLrPOhcag7Snwaic2e2nc4= X-Received: by 2002:a2e:88d4:: with SMTP id a20mr21209370ljk.201.1568162089454; Tue, 10 Sep 2019 17:34:49 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Greg Mirsky Date: Tue, 10 Sep 2019 17:34:37 -0700 Message-ID: To: Barry Leiba Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/alternative; boundary="0000000000004aea4405923c30d9" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 00:34:54 -0000 --0000000000004aea4405923c30d9 Content-Type: text/plain; charset="UTF-8" Hi Barry, thank you for the clarification. Yes, I agree that a new section can state it more clearly and give sufficient examples, as you've suggested. I'll work on it and will share when it is ready. Regards, Greg On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba wrote: > Hi, Greg, and thanks for the response. > > I think a minor rephrasing of the requirement isn't enough, really. > As I understand it now, after other discussion, it's not that you need > agreement from the users, but that you should put a paragraph (or > maybe a separate section, to highlight the point) that says that this > is not intended for use on the open Internet nor on production > networks, and gives examples of what it *is* intended for... perhaps > test networks, production networks during advertised maintenance > windows, that sort of thing. And then you don't need to say that the > network's users need to agree, but simply that they need to be aware > that performance testing will be happening during period X, and that > disruptions to normal network operation are possible. You'd need to > come up with text that the working group agrees with, of course, but I > think that if you do it will address my concern as well as some of the > others that were raised. > > Does that make sense? > > Barry > > On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky wrote: > > > > Hi Barry, > > thank you for your pointed question. Please find my explanation and the > proposed updated below under the GIM>> tag. > > > > Regards, > > Greg > > > > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker < > noreply@ietf.org> wrote: > >> > >> Barry Leiba has entered the following ballot position for > >> draft-ietf-ippm-stamp-07: Discuss > >> > >> When responding, please keep the subject line intact and reply to all > >> email addresses included in the To and CC lines. (Feel free to cut this > >> introductory paragraph, however.) > >> > >> > >> Please refer to > https://www.ietf.org/iesg/statement/discuss-criteria.html > >> for more information about IESG DISCUSS and COMMENT positions. > >> > >> > >> The document, along with other ballot positions, can be found here: > >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > >> > >> > >> > >> ---------------------------------------------------------------------- > >> DISCUSS: > >> ---------------------------------------------------------------------- > >> > >> I'm sure this will be easy to either explain to me or re-phrase: > >> > >> Sections 4 and 6 both say something like "MUST be agreed by all users > of the > >> network". What does that really mean? How is it remotely possible to > get > >> agreement from all users of your network? How is it remotely possible > that > >> they could understand what you're asking them to agree to? > > > > > > GIM>> Yes, looking at the bigger picture, at the Internet rather than > only at the domain where the test will be performed makes such condition > unattainable. Would s/network/network domain where the test is planned/ so > that it reads as: > > > > ... MUST be agreed by all users on the network domain where the test is > planned ... > > > > make it clearer and the number of parties involved reasonable, practical? > > As for what the could be the question users will be asked, I think that > it should verify whether the application that has the port number assigned > is active as the same number will be used as the destination port number in > the STAMP test. > --0000000000004aea4405923c30d9 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Barry,
thank you for the clarification. Yes, I agre= e that a new section can state it more clearly and give sufficient=C2=A0exa= mples, as you've suggested.
I'll work on it and will shar= e when it is ready.

Regards,
Greg
<= /div>
O= n Tue, Sep 10, 2019 at 5:15 PM Barry Leiba <barryleiba@computer.org> wrote:
Hi, Greg, and thanks for the response= .

I think a minor rephrasing of the requirement isn't enough, really.
As I understand it now, after other discussion, it's not that you need<= br> agreement from the users, but that you should put a paragraph (or
maybe a separate section, to highlight the point) that says that this
is not intended for use on the open Internet nor on production
networks, and gives examples of what it *is* intended for... perhaps
test networks, production networks during advertised maintenance
windows, that sort of thing.=C2=A0 And then you don't need to say that = the
network's users need to agree, but simply that they need to be aware that performance testing will be happening during period X, and that
disruptions to normal network operation are possible.=C2=A0 You'd need = to
come up with text that the working group agrees with, of course, but I
think that if you do it will address my concern as well as some of the
others that were raised.

Does that make sense?

Barry

On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
> Hi Barry,
> thank you for your pointed question. Please find my explanation and th= e proposed updated below under the GIM>> tag.
>
> Regards,
> Greg
>
> On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker <noreply@ietf.org> wro= te:
>>
>> Barry Leiba has entered the following ballot position for
>> draft-ietf-ippm-stamp-07: Discuss
>>
>> When responding, please keep the subject line intact and reply to = all
>> email addresses included in the To and CC lines. (Feel free to cut= this
>> introductory paragraph, however.)
>>
>>
>> Please refer to https://www.ietf.o= rg/iesg/statement/discuss-criteria.html
>> for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here= :
>> https://datatracker.ietf.org/doc/dra= ft-ietf-ippm-stamp/
>>
>>
>>
>> ------------------------------------------------------------------= ----
>> DISCUSS:
>> ------------------------------------------------------------------= ----
>>
>> I'm sure this will be easy to either explain to me or re-phras= e:
>>
>> Sections 4 and 6 both say something like "MUST be agreed by a= ll users of the
>> network".=C2=A0 What does that really mean?=C2=A0 How is it r= emotely possible to get
>> agreement from all users of your network?=C2=A0 How is it remotely= possible that
>> they could understand what you're asking them to agree to?
>
>
> GIM>> Yes, looking at the bigger picture, at the Internet rather= than only at the domain where the test will be performed makes such condit= ion unattainable. Would s/network/network domain where the test is planned/= =C2=A0 so that it reads as:
>
> ... MUST be agreed by all users on the network domain where the test i= s planned ...
>
> make it clearer and the number of parties involved reasonable, practic= al?
> As for what the could be the question users will be asked, I think tha= t it should verify whether the application that has the port number assigne= d is active as the same number will be used as the destination port number = in the STAMP test.
--0000000000004aea4405923c30d9-- From nobody Tue Sep 10 17:51:59 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2D057120806; Tue, 10 Sep 2019 17:51:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.922 X-Spam-Level: X-Spam-Status: No, score=-1.922 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.026, SPF_HELO_NONE=0.001, SPF_PASS=-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 BCCgUBa6TjGQ; Tue, 10 Sep 2019 17:51:48 -0700 (PDT) Received: from mail-io1-f49.google.com (mail-io1-f49.google.com [209.85.166.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8C28C1207FE; Tue, 10 Sep 2019 17:51:48 -0700 (PDT) Received: by mail-io1-f49.google.com with SMTP id r4so41929845iop.4; Tue, 10 Sep 2019 17:51:48 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=lA74Ty0b+6jcz54pwBRvAe6cvikVxAMA93g46FSvdcg=; b=SGeevjaRyR7uVU3rBeKazoK0tA+SCi8qzOw/QRLTXy/TX5WCcl072VlHjAUlY+kVuQ 0Hrp08lHBqQLE8WDD/FB6bxAtfPnWqF3AftNnIUhEG1XpWjuatFE+N1NPm+5BOkFnpm6 d2CQpeoCZUdTn1/QJm0/eE4sq0zUIqTHa75kmqeI/Hi3ouci+5QzzgPGaeff4FzkR8EI WqHVG2sSVIBebDkxqr+2yYn75vmRPVMpbKwV0VDUtBTk3WF5iqTbzdauCo1tC28Vwou3 tv2ShhIrkDPq8cRyLz4kT3tfrhg/OCtu0RNkbnAlHbJ2bDtZy8akav08EqVbozkul0+R lzIg== X-Gm-Message-State: APjAAAXowi/xyuMKt64+Xy8GwJhCkT4XgY14CF9mleEV6YiPKeIMgLmi O5E7i3V5EmfsX1IjON0+Y0+Wb7gi7vnUUU55JUk= X-Google-Smtp-Source: APXvYqxATk9V/LYx9nS/Qmb2oLJ+BzMyWEHQDKbXbibnmf5c5HW9morLOjzpupkBBge4bVAfc+gIH4bjNGMBvtw4ksI= X-Received: by 2002:a02:c984:: with SMTP id b4mr34845036jap.118.1568163107563; Tue, 10 Sep 2019 17:51:47 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Barry Leiba Date: Tue, 10 Sep 2019 20:51:36 -0400 Message-ID: To: Greg Mirsky Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: text/plain; charset="UTF-8" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 00:51:58 -0000 Thanks, Greg; I look forward to it. b On Tue, Sep 10, 2019 at 8:35 PM Greg Mirsky wrote: > > Hi Barry, > thank you for the clarification. Yes, I agree that a new section can state it more clearly and give sufficient examples, as you've suggested. > I'll work on it and will share when it is ready. > > Regards, > Greg > > On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba wrote: >> >> Hi, Greg, and thanks for the response. >> >> I think a minor rephrasing of the requirement isn't enough, really. >> As I understand it now, after other discussion, it's not that you need >> agreement from the users, but that you should put a paragraph (or >> maybe a separate section, to highlight the point) that says that this >> is not intended for use on the open Internet nor on production >> networks, and gives examples of what it *is* intended for... perhaps >> test networks, production networks during advertised maintenance >> windows, that sort of thing. And then you don't need to say that the >> network's users need to agree, but simply that they need to be aware >> that performance testing will be happening during period X, and that >> disruptions to normal network operation are possible. You'd need to >> come up with text that the working group agrees with, of course, but I >> think that if you do it will address my concern as well as some of the >> others that were raised. >> >> Does that make sense? >> >> Barry >> >> On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky wrote: >> > >> > Hi Barry, >> > thank you for your pointed question. Please find my explanation and the proposed updated below under the GIM>> tag. >> > >> > Regards, >> > Greg >> > >> > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker wrote: >> >> >> >> Barry Leiba has entered the following ballot position for >> >> draft-ietf-ippm-stamp-07: Discuss >> >> >> >> When responding, please keep the subject line intact and reply to all >> >> email addresses included in the To and CC lines. (Feel free to cut this >> >> introductory paragraph, however.) >> >> >> >> >> >> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html >> >> for more information about IESG DISCUSS and COMMENT positions. >> >> >> >> >> >> The document, along with other ballot positions, can be found here: >> >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ >> >> >> >> >> >> >> >> ---------------------------------------------------------------------- >> >> DISCUSS: >> >> ---------------------------------------------------------------------- >> >> >> >> I'm sure this will be easy to either explain to me or re-phrase: >> >> >> >> Sections 4 and 6 both say something like "MUST be agreed by all users of the >> >> network". What does that really mean? How is it remotely possible to get >> >> agreement from all users of your network? How is it remotely possible that >> >> they could understand what you're asking them to agree to? >> > >> > >> > GIM>> Yes, looking at the bigger picture, at the Internet rather than only at the domain where the test will be performed makes such condition unattainable. Would s/network/network domain where the test is planned/ so that it reads as: >> > >> > ... MUST be agreed by all users on the network domain where the test is planned ... >> > >> > make it clearer and the number of parties involved reasonable, practical? >> > As for what the could be the question users will be asked, I think that it should verify whether the application that has the port number assigned is active as the same number will be used as the destination port number in the STAMP test. 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Greg, Thanks for the reply. See inline for my comments and response.=20 On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > Hi Magnus, > thank you for the review and thoughtful, pointed questions. Please > find my answers in-line under GIM>> tag. >=20 > Regards, > Greg >=20 > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker < > noreply@ietf.org> wrote: > > Magnus Westerlund has entered the following ballot position for > > draft-ietf-ippm-stamp-07: Discuss > >=20 > > When responding, please keep the subject line intact and reply to > > all > > email addresses included in the To and CC lines. (Feel free to cut > > this > > introductory paragraph, however.) > >=20 > >=20 > > Please refer to=20 > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > for more information about IESG DISCUSS and COMMENT positions. > >=20 > >=20 > > The document, along with other ballot positions, can be found here: > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > >=20 > >=20 > >=20 > > ----------------------------------------------------------------- > > ----- > > DISCUSS: > > ----------------------------------------------------------------- > > ----- > >=20 > > Two very much discussing discusses. However, I would really like to > > hear the > > answer to these concerns before clearing. > >=20 > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If > > there ever > > would exist a need to deploy another integrity solution, even if > > the actual > > algorithm used to construct the tag can be agreed by the > > management, there > > appear to exist a hard look in to use 16-byte tags. Have this issue > > been > > considered? >=20 > GIM>> Indeed, this specification defines the use of only one > algorithm and only 16 bytes-long HMAC field. Your question prompted > the discussion among authors and we believe that in a future > specification it would be feasible to extend supporting a number of > algorithms and different lengths of HMAC field both being defined > through extension to STAMP YANG data model. So if I understand this (taking a discussion with Mirja about keeping things as simple as possible) the solution is to basically is when need arises define a new STAMP version, and then use YANG to coordinate which version is used for the measurement. If that is a correct re- interpretation of your response then I am fine with it.=20 > > 2. Section 6: > > The possible impact of the > > STAMP test packets on the network MUST be thoroughly analyzed, > > and > > the use of STAMP for each case MUST be agreed by all users on > > the > > network before starting the STAMP test session. > >=20 > > I assume some potential issues are know, shouldn't they > > really be > > listed here in the security consideration to further > > motivate why the > > analysis needs to happen. >=20 > GIM>> This is in reference to using numbers from the User range as > the destination port number. Would adding the reference to the case > of using the port numbers from the User range address your concern? > Or rather refer to Section 4, as it includes more discussion (see=20 > below)?=20 Okay, I don't really care where the discussion happens. But I don't find any real discussion and listing of the concerns with using user or dynamic ports for STAMP Sessions? With the formulation you use, I would expect at least some list of potential concerns that needs to be evaluated in the context of the particular usage of STAMP.=20 > >=20 > > ----------------------------------------------------------------- > > ----- > > COMMENT: > > ----------------------------------------------------------------- > > ----- > >=20 > > 1. Section 4: > > Before using numbers from the User Ports range, the > > possible impact > > on the network MUST be carefully studied and agreed by all users > > of > > the network. > >=20 > > Is the above sentence missing to list an important > > assumption? Is the > > assumption that by using the registred destination port an > > operator > > that sees to much STAMP traffic can simply filter it out > > and that way > > deal with the traffic, something which is not possible when > > using an > > locally decided port? If that is the case, this assumption > > should > > probably be noted. >=20 > GIM>> That is a very good point but our primary motivation for this > cautionary note (or strong warning) was that by allowing STAMP to use > port numbers from the User range, ports that may be already assigned > to protocols, creates a DDOS attack vector. As for the filtering > STAMP traffic out, I think that even if the destination port is one > from the Dynamic range, for a relatively long test session it can be > filtered out. So if that is the only? concern then write it out. I would expect that the higher layer management protocol that creates a measurement session to actually ensure that the STAMP endpoint actually have the port numbers they attempt to use. Isn't that a reasonable requirement to put on the solution?=20 My thinking with the filtering out concern was that in cases where one runs STAMP measurement sessions, if the measurement interfer with critical traffic an action for an on-path node that can actually identify the STAMP traffic was to filer it out. And that may be considered trivial when the well known port is used, but if a user or dynamic port is used, then that requries a managment system to provide the on-path node with the necessary information, i.e. 3/5 tuple for the STAMP flows.=20 > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? Is > > that a > > measurment session between one specific and sender and a > > specific > > reflector for a time duration? The defenition of the > > session do matter > > if one intended to enable a single sender to use multiple > > reflectors, > > and if that can be a single session or always multiple > > indepdendent > > ones. Would appreciate a definition what a session is. If > > it is > > possible to send STAMP traffic using a multicast or > > broadcast address > > should be made explicit. >=20 > GIM>> Your interpretation is correct, STAMP session is implicitly > defined as p2p. And that is what reflected in the STAMP YANG model. > Would the following text make it clearer: > NEW TEXT: > In this document, a measurement session also referred to as > STAMP session, is the session between one specific Session-Sender > and > one particular Session-Reflector for a time duration. Yes, please include that definition. Question would it be clearer to replace ".. is the session betweeen .." with ".. is the bi-directional packet flows between .."?=20 > > 3. Section 4.1.1.: > > Timestamp is eight octets long field. STAMP node MUST > > support > > Network Time Protocol (NTP) version 4 64-bit timestamp format > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > support > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > timestamp > > format [IEEE.1588.2008], the format used in [RFC8186]. > >=20 > > Is the clock source here something that may be relevant or > > simply > > information the management functions should capture. I > > think there is a > > similar issue to that of RTP faced when it comes to > > understand what the > > timestamp actually represent and thus be used correctly. > > RTP clock > > source specification is RFC 7273 > > (https://datatracker.ietf.org/doc/rfc7273/) >=20 > GIM>> NTP and PTP encodings have a different interpretation of the > Fraction field of the Timestamp field. In my experience, PTP format > is native for the data plane, while NTP is more used at the control > plane. Original extension to TWAMP has been described in RFC 8186. I think you missunderstood. When I talk about clock source, I am actually referring to identifying the particular clock that the node use to derive the included timestamp from.=20 And likely this is a moot point in this document where the clock source information belongs in the management layer, e.g. in the YANG data model.=20 > > 4. Section 4.1: > > Because STAMP supports symmetrical test packets, STAMP > > Session-Sender > > packet has a minimum size of 44 octets in unauthenticated mode, > > see > > Figure 2, and 112 octets in the authenticated mode, see Figure > > 4. > >=20 > > The above text implies some potential for UDP payload size > > variability > > for the STAMP packets. However, the actual definition > > appear to have > > fixed sizes. Can you please clarify if I have missed > > something that > > enables the STAMP packet to have variable size? >=20 > GIM>> I think that the text can be improved by characterizing the > listed sizes as "base". The variable length of a test packet in STAMP > is supported by using Extra Padding TLV defined in draft-ietf-ippm- > stamp-option-tlv. Below is the proposed update: > OLD TEXT: > Because STAMP supports symmetrical test packets, STAMP Session- > Sender > packet has a minimum size of 44 octets in unauthenticated mode, > see > Figure 2, and 112 octets in the authenticated mode, see Figure 4. > NEW TEXT: > STAMP supports symmetrical test packets. The base STAMP Session- > Sender packet has a minimum size of 44 octets in unauthenticated > mode, see Figure 2, and 112 octets in the authenticated mode, see > Figure 4. The variable length of a test packet in STAMP is > supported > by using Extra Padding TLV defined in > [I-D.ietf-ippm-stamp-option-tlv]. >=20 > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > moved to the Normative References list or may remain in the > Informative list? =46rom my perspective, the fact that optional TLV may occur following the base headers appears quite important. Here comes a question of intention form the WG. Is it intended that one can have STAMP endpoints that do not even support receiving packets larger than the base?=20 In other words there will be two main versions already now, one that supports some TLV and can at least handle the TLV skip forward and ignore the content and one that will throw a fit over the TLVs? If that is not the intention I think the fact that TLV's may occur should be moved into this specification and have it as a normative reference. I guess the answer is that you have backwards comaptibility reasons for not allowing TLVs at all in some sessions, or?=20 =20 Cheers Magnus Westerlund=20 ---------------------------------------------------------------------- Network Architecture & Protocols, Ericsson Research ---------------------------------------------------------------------- Ericsson AB | Phone +46 10 7148287 Torshamnsgatan 23 | Mobile +46 73 0949079 SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com ---------------------------------------------------------------------- --=-tpnvwdBdulMxjGUGy6LC Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEtww ggYHMIID76ADAgECAhALRm3NcHtuMGWutmt5cXntMA0GCSqGSIb3DQEBCwUAMEcxCzAJBgNVBAYT AlNFMREwDwYDVQQKDAhFcmljc3NvbjElMCMGA1UEAwwcRXJpY3Nzb24gTkwgSW5kaXZpZHVhbCBD 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autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=accedian-com.20150623.gappssmtp.com 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 juqArXUbqVry for ; Wed, 11 Sep 2019 01:30:19 -0700 (PDT) Received: from mail-ua1-x943.google.com (mail-ua1-x943.google.com [IPv6:2607:f8b0:4864:20::943]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3B587120828 for ; Wed, 11 Sep 2019 01:30:19 -0700 (PDT) Received: by mail-ua1-x943.google.com with SMTP id s15so6494716uaq.6 for ; Wed, 11 Sep 2019 01:30:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=accedian-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=V/MZ2DOJ/xUzLvEu2kl0r2VW8YYoz+6vAANB50TeUIM=; 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APjAAAWfxjIKtIiaCv6x77N8A3ByMmNHWnXcDFStbdmPSzI2TzB9ONfW eusPKsgHzY/iZh+c92iZbJp5YW29Jap8g1R/TKzVyKxoZEUXkuFmA+W9da2wV3MXyfW3LbR3FvD MGRPtLrKHSA== X-Google-Smtp-Source: APXvYqyPFWnG4LpsYS4+6WjMLZMWKi/YAY6CW9oGr5Z7xPFGq9RcXZ3pqRoU5TuzceKHOKAinqoS81YrUxq5NGg/2Ps= X-Received: by 2002:ab0:230d:: with SMTP id a13mr16871030uao.110.1568190617858; Wed, 11 Sep 2019 01:30:17 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> In-Reply-To: <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> From: Henrik Nydell Date: Wed, 11 Sep 2019 10:30:06 +0200 Message-ID: To: Magnus Westerlund Cc: "gregimirsky@gmail.com" , "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Content-Type: multipart/alternative; boundary="000000000000b7c5cf059242d409" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 08:30:23 -0000 --000000000000b7c5cf059242d409 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable See below for PTP/NTP comment On Wed, Sep 11, 2019 at 9:53 AM Magnus Westerlund < magnus.westerlund@ericsson.com> wrote: > Hi Greg, > > Thanks for the reply. See inline for my comments and response. > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > Hi Magnus, > > thank you for the review and thoughtful, pointed questions. Please > > find my answers in-line under GIM>> tag. > > > > Regards, > > Greg > > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker < > > noreply@ietf.org> wrote: > > > Magnus Westerlund has entered the following ballot position for > > > draft-ietf-ippm-stamp-07: Discuss > > > > > > When responding, please keep the subject line intact and reply to > > > all > > > email addresses included in the To and CC lines. (Feel free to cut > > > this > > > introductory paragraph, however.) > > > > > > > > > Please refer to > > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > > for more information about IESG DISCUSS and COMMENT positions. > > > > > > > > > The document, along with other ballot positions, can be found here: > > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > > > > > > > > > ----------------------------------------------------------------- > > > ----- > > > DISCUSS: > > > ----------------------------------------------------------------- > > > ----- > > > > > > Two very much discussing discusses. However, I would really like to > > > hear the > > > answer to these concerns before clearing. > > > > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If > > > there ever > > > would exist a need to deploy another integrity solution, even if > > > the actual > > > algorithm used to construct the tag can be agreed by the > > > management, there > > > appear to exist a hard look in to use 16-byte tags. Have this issue > > > been > > > considered? > > > > GIM>> Indeed, this specification defines the use of only one > > algorithm and only 16 bytes-long HMAC field. Your question prompted > > the discussion among authors and we believe that in a future > > specification it would be feasible to extend supporting a number of > > algorithms and different lengths of HMAC field both being defined > > through extension to STAMP YANG data model. > > So if I understand this (taking a discussion with Mirja about keeping > things as simple as possible) the solution is to basically is when need > arises define a new STAMP version, and then use YANG to coordinate > which version is used for the measurement. If that is a correct re- > interpretation of your response then I am fine with it. > > > > 2. Section 6: > > > The possible impact of the > > > STAMP test packets on the network MUST be thoroughly analyzed, > > > and > > > the use of STAMP for each case MUST be agreed by all users on > > > the > > > network before starting the STAMP test session. > > > > > > I assume some potential issues are know, shouldn't they > > > really be > > > listed here in the security consideration to further > > > motivate why the > > > analysis needs to happen. > > > > GIM>> This is in reference to using numbers from the User range as > > the destination port number. Would adding the reference to the case > > of using the port numbers from the User range address your concern? > > Or rather refer to Section 4, as it includes more discussion (see > > below)? > > Okay, I don't really care where the discussion happens. But I don't > find any real discussion and listing of the concerns with using user or > dynamic ports for STAMP Sessions? With the formulation you use, I would > expect at least some list of potential concerns that needs to be > evaluated in the context of the particular usage of STAMP. > > > > > > > ----------------------------------------------------------------- > > > ----- > > > COMMENT: > > > ----------------------------------------------------------------- > > > ----- > > > > > > 1. Section 4: > > > Before using numbers from the User Ports range, the > > > possible impact > > > on the network MUST be carefully studied and agreed by all users > > > of > > > the network. > > > > > > Is the above sentence missing to list an important > > > assumption? Is the > > > assumption that by using the registred destination port an > > > operator > > > that sees to much STAMP traffic can simply filter it out > > > and that way > > > deal with the traffic, something which is not possible when > > > using an > > > locally decided port? If that is the case, this assumption > > > should > > > probably be noted. > > > > GIM>> That is a very good point but our primary motivation for this > > cautionary note (or strong warning) was that by allowing STAMP to use > > port numbers from the User range, ports that may be already assigned > > to protocols, creates a DDOS attack vector. As for the filtering > > STAMP traffic out, I think that even if the destination port is one > > from the Dynamic range, for a relatively long test session it can be > > filtered out. > > So if that is the only? concern then write it out. I would expect that > the higher layer management protocol that creates a measurement session > to actually ensure that the STAMP endpoint actually have the port > numbers they attempt to use. Isn't that a reasonable requirement to put > on the solution? > > My thinking with the filtering out concern was that in cases where one > runs STAMP measurement sessions, if the measurement interfer with > critical traffic an action for an on-path node that can actually > identify the STAMP traffic was to filer it out. And that may be > considered trivial when the well known port is used, but if a user or > dynamic port is used, then that requries a managment system to provide > the on-path node with the necessary information, i.e. 3/5 tuple for the > STAMP flows. > > > > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? Is > > > that a > > > measurment session between one specific and sender and a > > > specific > > > reflector for a time duration? The defenition of the > > > session do matter > > > if one intended to enable a single sender to use multiple > > > reflectors, > > > and if that can be a single session or always multiple > > > indepdendent > > > ones. Would appreciate a definition what a session is. If > > > it is > > > possible to send STAMP traffic using a multicast or > > > broadcast address > > > should be made explicit. > > > > GIM>> Your interpretation is correct, STAMP session is implicitly > > defined as p2p. And that is what reflected in the STAMP YANG model. > > Would the following text make it clearer: > > NEW TEXT: > > In this document, a measurement session also referred to as > > STAMP session, is the session between one specific Session-Sender > > and > > one particular Session-Reflector for a time duration. > > Yes, please include that definition. Question would it be clearer to > replace ".. is the session betweeen .." with ".. is the bi-directional > packet flows between .."? > > > > > 3. Section 4.1.1.: > > > Timestamp is eight octets long field. STAMP node MUST > > > support > > > Network Time Protocol (NTP) version 4 64-bit timestamp format > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > support > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > timestamp > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > > Is the clock source here something that may be relevant or > > > simply > > > information the management functions should capture. I > > > think there is a > > > similar issue to that of RTP faced when it comes to > > > understand what the > > > timestamp actually represent and thus be used correctly. > > > RTP clock > > > source specification is RFC 7273 > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > GIM>> NTP and PTP encodings have a different interpretation of the > > Fraction field of the Timestamp field. In my experience, PTP format > > is native for the data plane, while NTP is more used at the control > > plane. Original extension to TWAMP has been described in RFC 8186. > > I think you missunderstood. When I talk about clock source, I am > actually referring to identifying the particular clock that the node > use to derive the included timestamp from. > > And likely this is a moot point in this document where the clock source > information belongs in the management layer, e.g. in the YANG data > model. > In section 4.1.1 of draft-ietf-ippm-stamp there is a definition of the Z-bit in the error correction field that denotes if the clock source is NTP or PTP > > > > > 4. Section 4.1: > > > Because STAMP supports symmetrical test packets, STAMP > > > Session-Sender > > > packet has a minimum size of 44 octets in unauthenticated mode, > > > see > > > Figure 2, and 112 octets in the authenticated mode, see Figure > > > 4. > > > > > > The above text implies some potential for UDP payload size > > > variability > > > for the STAMP packets. However, the actual definition > > > appear to have > > > fixed sizes. Can you please clarify if I have missed > > > something that > > > enables the STAMP packet to have variable size? > > > > GIM>> I think that the text can be improved by characterizing the > > listed sizes as "base". The variable length of a test packet in STAMP > > is supported by using Extra Padding TLV defined in draft-ietf-ippm- > > stamp-option-tlv. Below is the proposed update: > > OLD TEXT: > > Because STAMP supports symmetrical test packets, STAMP Session- > > Sender > > packet has a minimum size of 44 octets in unauthenticated mode, > > see > > Figure 2, and 112 octets in the authenticated mode, see Figure 4. > > NEW TEXT: > > STAMP supports symmetrical test packets. The base STAMP Session- > > Sender packet has a minimum size of 44 octets in unauthenticated > > mode, see Figure 2, and 112 octets in the authenticated mode, see > > Figure 4. The variable length of a test packet in STAMP is > > supported > > by using Extra Padding TLV defined in > > [I-D.ietf-ippm-stamp-option-tlv]. > > > > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > > moved to the Normative References list or may remain in the > > Informative list? > > From my perspective, the fact that optional TLV may occur following the > base headers appears quite important. Here comes a question of > intention form the WG. Is it intended that one can have STAMP endpoints > that do not even support receiving packets larger than the base? > > In other words there will be two main versions already now, one that > supports some TLV and can at least handle the TLV skip forward and > ignore the content and one that will throw a fit over the TLVs? If that > is not the intention I think the fact that TLV's may occur should be > moved into this specification and have it as a normative reference. > > I guess the answer is that you have backwards comaptibility reasons for > not allowing TLVs at all in some sessions, or? > > > Cheers > > Magnus Westerlund > > > ---------------------------------------------------------------------- > Network Architecture & Protocols, Ericsson Research > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Torshamnsgatan 23 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > > --=20 *Henrik Nydell* *Sr Product Manager* 1.866.685.8181 hnydell@accedian.com *accedian.com * --=20 Avis de confidentialit=C3=A9 Les informations contenues dans le pr=C3=A9sent=20 message et dans toute pi=C3=A8ce qui=20 lui est jointe sont confidentielles et=20 peuvent =C3=AAtre prot=C3=A9g=C3=A9es par le=20 secret professionnel. 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Thank you. --000000000000b7c5cf059242d409 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
See below for PTP/NTP comment

On Wed, Sep 11, 2019 at = 9:53 AM Magnus Westerlund <magnus.westerlund@ericsson.com> wrote:
Hi Greg,

Thanks for the reply. See inline for my comments and response.


On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote:
> Hi Magnus,
> thank you for the review and thoughtful, pointed questions. Please
> find my answers in-line under GIM>> tag.
>
> Regards,
> Greg
>
> On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker <<= br> > noreply@ietf.org= > wrote:
> > Magnus Westerlund has entered the following ballot position for > > draft-ietf-ippm-stamp-07: Discuss
> >
> > When responding, please keep the subject line intact and reply to=
> > all
> > email addresses included in the To and CC lines. (Feel free to cu= t
> > this
> > introductory paragraph, however.)
> >
> >
> > Please refer to
> > https://www.ietf.org/iesg/stateme= nt/discuss-criteria.html
> > for more information about IESG DISCUSS and COMMENT positions. > >
> >
> > The document, along with other ballot positions, can be found her= e:
> > https://datatracker.ietf.org/doc/dr= aft-ietf-ippm-stamp/
> >
> >
> >
> > -----------------------------------------------------------------=
> > -----
> > DISCUSS:
> > -----------------------------------------------------------------=
> > -----
> >
> > Two very much discussing discusses. However, I would really like = to
> > hear the
> > answer to these concerns before clearing.
> >
> > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If=
> > there ever
> > would exist a need to deploy another integrity solution, even if<= br> > > the actual
> > algorithm used to construct the tag can be agreed by the
> > management, there
> > appear to exist a hard look in to use 16-byte tags. Have this iss= ue
> > been
> > considered?
>
> GIM>> Indeed, this specification defines the use of only one
> algorithm and only 16 bytes-long HMAC field. Your question prompted > the discussion among authors and we believe that in a future
> specification it would be feasible to extend supporting a number of > algorithms and different lengths of HMAC field both being defined
> through extension to STAMP YANG data model.

So if I understand this (taking a discussion with Mirja about keeping
things as simple as possible) the solution is to basically is when need
arises define a new STAMP version, and then use YANG to coordinate
which version is used for the measurement. If that is a correct re-
interpretation of your response then I am fine with it.

> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 6:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The possible impact of the
> >=C2=A0 =C2=A0 STAMP test packets on the network MUST be thoroughly= analyzed,
> > and
> >=C2=A0 =C2=A0 the use of STAMP for each case MUST be agreed by all= users on
> > the
> >=C2=A0 =C2=A0 network before starting the STAMP test session.
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I assume some potential issues a= re know, shouldn't they
> > really be
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0listed here in the security cons= ideration to further
> > motivate why the
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0analysis needs to happen.
>
> GIM>> This is in reference to using numbers from the User range = as
> the destination port number. Would adding the reference to the case > of using the port numbers from the User range address your concern? > Or rather refer to Section 4, as it includes more discussion (see
> below)?

Okay, I don't really care where the discussion happens. But I don't=
find any real discussion and listing of the concerns with using user or
dynamic ports for STAMP Sessions? With the formulation you use, I would
expect at least some list of potential concerns that needs to be
evaluated in the context of the particular usage of STAMP.

> >
> > -----------------------------------------------------------------=
> > -----
> > COMMENT:
> > -----------------------------------------------------------------=
> > -----
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01. Section 4:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Before using numbers from the Us= er Ports range, the
> > possible impact
> >=C2=A0 =C2=A0 on the network MUST be carefully studied and agreed = by all users
> > of
> >=C2=A0 =C2=A0 the network.
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the above sentence missing to= list an important
> > assumption? Is the
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0assumption that by using the reg= istred destination port an
> > operator
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that sees to much STAMP traffic = can simply filter it out
> > and that way
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0deal with the traffic, something= which is not possible when
> > using an
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0locally decided port? If that is= the case, this assumption
> > should
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably be noted.
>
> GIM>> That is a very good point but our primary motivation for t= his
> cautionary note (or strong warning) was that by allowing STAMP to use<= br> > port numbers from the User range, ports that may be already assigned > to protocols, creates a DDOS attack vector. As for the filtering
> STAMP traffic out, I think that even if the destination port is one > from the Dynamic range, for a relatively long test session it can be > filtered out.

So if that is the only? concern then write it out. I would expect that
the higher layer management protocol that creates a measurement session
to actually ensure that the STAMP endpoint actually have the port
numbers they attempt to use. Isn't that a reasonable requirement to put=
on the solution?

My thinking with the filtering out concern was that in cases where one
runs STAMP measurement sessions, if the measurement interfer with
critical traffic an action for an on-path node that can actually
identify the STAMP traffic was to filer it out. And that may be
considered trivial when the well known port is used, but if a user or
dynamic port is used, then that requries a managment system to provide
the on-path node with the necessary information, i.e. 3/5 tuple for the
STAMP flows.


> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 3 and 4, and 4.1.1: W= hat is a STAMP Session? Is
> > that a
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0measurment session between one s= pecific and sender and a
> > specific
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reflector for a time duration?= =C2=A0 The defenition of the
> > session do matter
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0if one intended to enable a sing= le sender to use multiple
> > reflectors,
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and if that can be a single sess= ion or always multiple
> > indepdendent
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ones. Would appreciate a definit= ion what a session is. If
> > it is
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0possible to send STAMP traffic u= sing a multicast or
> > broadcast address
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0should be made explicit.
>
> GIM>> Your interpretation is correct, STAMP session is implicitl= y
> defined as p2p. And that is what reflected in the STAMP YANG model. > Would the following text make it clearer:
> NEW TEXT:
>=C2=A0 =C2=A0 In this document, a measurement session also referred to = as
>=C2=A0 =C2=A0 STAMP session, is the session between one specific Sessio= n-Sender
> and
>=C2=A0 =C2=A0 one particular Session-Reflector for a time duration.

Yes, please include that definition. Question would it be clearer to
replace ".. is the session betweeen .." with ".. is the bi-d= irectional
packet flows between .."?


> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.=C2=A0 Section 4.1.1.:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Timestamp is eight octets long f= ield.=C2=A0 STAMP node MUST
> > support
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0Network Time Protocol (NTP) version 4 6= 4-bit timestamp format
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC5905], the format used in [RFC5357]= .=C2=A0 STAMP node MAY
> > support
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0IEEE 1588v2 Precision Time Protocol tru= ncated 64-bit
> > timestamp
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0format [IEEE.1588.2008], the format use= d in [RFC8186].
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the clock source here somethi= ng that may be relevant or
> > simply
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0information the management funct= ions should capture. I
> > think there is a
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0similar issue to that of RTP fac= ed when it comes to
> > understand what the
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0timestamp actually represent and= thus be used correctly.
> > RTP clock
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0source specification is RFC 7273=
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(https://datatra= cker.ietf.org/doc/rfc7273/)
>
> GIM>> NTP and PTP encodings have a different interpretation of t= he
> Fraction field of the Timestamp field. In my experience, PTP format > is native for the data plane, while NTP is more used at the control > plane. Original extension to TWAMP has been described in RFC 8186.

I think you missunderstood. When I talk about clock source, I am
actually referring to identifying the particular clock that the node
use to derive the included timestamp from.

And likely this is a moot point in this document where the clock source
information belongs in the management layer, e.g. in the YANG data
model.
=C2=A0
In section 4.1.1 of=C2=A0draf= t-ietf-ippm-stamp there is a definition of the Z-bit in the error correctio= n field that denotes if the clock source is NTP or PTP
=C2=A0


> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04. Section 4.1:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Because STAMP supports s= ymmetrical test packets, STAMP
> > Session-Sender
> >=C2=A0 =C2=A0 packet has a minimum size of 44 octets in unauthenti= cated mode,
> > see
> >=C2=A0 =C2=A0 Figure 2, and 112 octets in the authenticated mode, = see Figure
> > 4.
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The above text implies some pote= ntial for UDP payload size
> > variability
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0for the STAMP packets. However, = the actual definition
> > appear to have
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0fixed sizes. Can you please clar= ify if I have missed
> > something that
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0enables the STAMP packet to have= variable size?
>
> GIM>> I think that the text can be improved by characterizing th= e
> listed sizes as "base". The variable length of a test packet= in STAMP
> is supported by using Extra Padding TLV defined in draft-ietf-ippm- > stamp-option-tlv. Below is the proposed update:
> OLD TEXT:
>=C2=A0 =C2=A0 Because STAMP supports symmetrical test packets, STAMP Se= ssion-
> Sender
>=C2=A0 =C2=A0 packet has a minimum size of 44 octets in unauthenticated= mode,
> see
>=C2=A0 =C2=A0 Figure 2, and 112 octets in the authenticated mode, see F= igure 4.
> NEW TEXT:
>=C2=A0 =C2=A0 STAMP supports symmetrical test packets.=C2=A0 The base S= TAMP Session-
>=C2=A0 =C2=A0 Sender packet has a minimum size of 44 octets in unauthen= ticated
>=C2=A0 =C2=A0 mode, see Figure 2, and 112 octets in the authenticated m= ode, see
>=C2=A0 =C2=A0 Figure 4.=C2=A0 The variable length of a test packet in S= TAMP is
> supported
>=C2=A0 =C2=A0 by using Extra Padding TLV defined in
>=C2=A0 =C2=A0 [I-D.ietf-ippm-stamp-option-tlv].
>
> With the new reference, should I-D.ietf-ippm-stamp-option-tlv be
> moved to the Normative References list or may remain in the
> Informative list?

>From my perspective, the fact that optional TLV may occur following the
base headers appears quite important. Here comes a question of
intention form the WG. Is it intended that one can have STAMP endpoints
that do not even support receiving packets larger than the base?

In other words there will be two main versions already now, one that
supports some TLV and can at least handle the TLV skip forward and
ignore the content and one that will throw a fit over the TLVs? If that
is not the intention I think the fact that TLV's may occur should be moved into this specification and have it as a normative reference.

I guess the answer is that you have backwards comaptibility reasons for
not allowing TLVs at all in some sessions, or?


Cheers

Magnus Westerlund


----------------------------------------------------------------------
Network Architecture & Protocols, Ericsson Research
----------------------------------------------------------------------
Ericsson AB=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| = Phone=C2=A0 +46 10 7148287
Torshamnsgatan 23=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| Mobile +46 73 0= 949079
SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------




--

Henrik Nydell
Sr Product Manager
1.866.685.8181
hnydell@accedian.= com
3D""
=3D""=C2=A03D""=C2=A03D""
3D""
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--000000000000b7c5cf059242d409-- From nobody Wed Sep 11 01:42:50 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F1DB21200B2 for ; Wed, 11 Sep 2019 01:42:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.888 X-Spam-Level: X-Spam-Status: No, score=-1.888 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_REMOTE_IMAGE=0.01, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=accedian-com.20150623.gappssmtp.com 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 qSH5O06i0omu for ; Wed, 11 Sep 2019 01:42:36 -0700 (PDT) Received: from mail-vk1-xa35.google.com (mail-vk1-xa35.google.com [IPv6:2607:f8b0:4864:20::a35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 10198120833 for ; Wed, 11 Sep 2019 01:42:36 -0700 (PDT) Received: by mail-vk1-xa35.google.com with SMTP id d126so2086485vkb.1 for ; Wed, 11 Sep 2019 01:42:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=accedian-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=FXLlikzcOce6ISzttD0uKhkmWP4RPqldDJSRuSSS4Bc=; b=mL5ZZAok/Eru9Be4F/IDQ2Tbz5pJanY1uvpL0uTbl/dCvR7BPBM4QIhuurD76p9po4 UNgIxbbcQe36Z/7KC22Fz6r4J79i713qSz/m8lv4lDz0gqxkwLtQe7XkZjuM6zoS8mz1 lKw8Pxj+GK9ii0FdpXqKi02wvIqyzsaQKLG/4N0Ogb7owVmgZXH1ln54VCvNFc5GlPk1 u4o6FyIo+Fo1SMU7c1hs3csBRGILGMKWGS7+UmznUYwvPLLahYxYe4LFGuz49+lLfl5I LbqW/msLETCs3j1sTwwV2WO/Gk0bzv30h1VPAo/GDd4Dig1FM4Y8AUCLx4WoQGtAXqyN XNig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=FXLlikzcOce6ISzttD0uKhkmWP4RPqldDJSRuSSS4Bc=; b=BlawYlMbXvBUmjecoi1i1jMlNUBYnO7l3YWJ+H6mozEdmqjk0kDgEvz6ECFnJ0Bz3z lviaP+H0LQ3qY/JTiJzuuEzqI1wGTiMeM9bod6y2DwZCaGRAe09YQeZ4rUE0zhRDdNl7 yaNOPIdHUuImIaFzoe3+R6983BcDzsBpNyxXl/p5oTVnJ/uVj/ysfAlxJoBRfiVeVTcT gWYSOTcglNfhfLyc9iMm90syXC+UYPdmEVJ0YcgbiDlE0osVsUaHAMBT8gIEC6MitfwU z9N5904pGAD1wA5+7NmBVuiT9tIGtL0k/Yr/fPMZfSoVxrHbyU+jxVG/BZWaJrjZNNT1 HqIw== X-Gm-Message-State: APjAAAU3AbsHE3RjaAjbDt8QIknJQyX2I9T4sC2eoL9Qzi4+v7bT3Wyi g/YqtE7IQsjurjoaq9I/65OYZ3K/qkEY8HbeyIWys4x1J4Kewvtcs7lXwDVbcii34uceyPx5Rfe zKb6yMM2IQw== X-Google-Smtp-Source: APXvYqwrcPXWi49U8ntB6Nivq+ukfFyeualVURmg6tsnisDslXkQUI4TzKjcuml2TPpS0EG+mWVriIM7OrIeIKFnRps= X-Received: by 2002:a1f:2192:: with SMTP id h140mr5527422vkh.92.1568191354976; Wed, 11 Sep 2019 01:42:34 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Henrik Nydell Date: Wed, 11 Sep 2019 10:42:23 +0200 Message-ID: To: Barry Leiba Cc: Greg Mirsky , The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/alternative; boundary="000000000000a752020592430004" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 08:42:40 -0000 --000000000000a752020592430004 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable The STAMP test (As for RFC5357 TWAMP and for example Cisco IP-SLA , Huawei U.2520, Juniper RPM and other in-line test functions) is indeed intended to be used on production networks to enable the operator to assess service level agreements based on delay, jitter and loss. So the rephrasing needs to be done keeping that in mind, and I see no implications on using it over the Internet either. The agreement on UDP ports to use needs to be done between the session-sender and the session-reflector only. Intermediate nodes or other users of the network need not be aware of the STAMP test or the ports it uses. It is in fact desirable that the STAMP packets are not distinguishable from other traffic on the network, but are treated just like any user traffic in the class of service they are transmitted. Best Henrik On Wed, Sep 11, 2019 at 2:15 AM Barry Leiba wrote= : > Hi, Greg, and thanks for the response. > > I think a minor rephrasing of the requirement isn't enough, really. > As I understand it now, after other discussion, it's not that you need > agreement from the users, but that you should put a paragraph (or > maybe a separate section, to highlight the point) that says that this > is not intended for use on the open Internet nor on production > networks, and gives examples of what it *is* intended for... perhaps > test networks, production networks during advertised maintenance > windows, that sort of thing. And then you don't need to say that the > network's users need to agree, but simply that they need to be aware > that performance testing will be happening during period X, and that > disruptions to normal network operation are possible. You'd need to > come up with text that the working group agrees with, of course, but I > think that if you do it will address my concern as well as some of the > others that were raised. > > Does that make sense? > > Barry > > On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky wrote= : > > > > Hi Barry, > > thank you for your pointed question. Please find my explanation and the > proposed updated below under the GIM>> tag. > > > > Regards, > > Greg > > > > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker < > noreply@ietf.org> wrote: > >> > >> Barry Leiba has entered the following ballot position for > >> draft-ietf-ippm-stamp-07: Discuss > >> > >> When responding, please keep the subject line intact and reply to all > >> email addresses included in the To and CC lines. (Feel free to cut thi= s > >> introductory paragraph, however.) > >> > >> > >> Please refer to > https://www.ietf.org/iesg/statement/discuss-criteria.html > >> for more information about IESG DISCUSS and COMMENT positions. > >> > >> > >> The document, along with other ballot positions, can be found here: > >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > >> > >> > >> > >> ---------------------------------------------------------------------- > >> DISCUSS: > >> ---------------------------------------------------------------------- > >> > >> I'm sure this will be easy to either explain to me or re-phrase: > >> > >> Sections 4 and 6 both say something like "MUST be agreed by all users > of the > >> network". What does that really mean? How is it remotely possible to > get > >> agreement from all users of your network? How is it remotely possible > that > >> they could understand what you're asking them to agree to? > > > > > > GIM>> Yes, looking at the bigger picture, at the Internet rather than > only at the domain where the test will be performed makes such condition > unattainable. Would s/network/network domain where the test is planned/ = so > that it reads as: > > > > ... MUST be agreed by all users on the network domain where the test is > planned ... > > > > make it clearer and the number of parties involved reasonable, practica= l? > > As for what the could be the question users will be asked, I think that > it should verify whether the application that has the port number assigne= d > is active as the same number will be used as the destination port number = in > the STAMP test. > --=20 *Henrik Nydell* *Sr Product Manager* 1.866.685.8181 hnydell@accedian.com *accedian.com * --=20 Avis de confidentialit=C3=A9 Les informations contenues dans le pr=C3=A9sent=20 message et dans toute pi=C3=A8ce qui=20 lui est jointe sont confidentielles et=20 peuvent =C3=AAtre prot=C3=A9g=C3=A9es par le=20 secret professionnel. Ces informations sont=20 =C3=A0 l=E2=80=99usage exclusif de son ou de ses destinataires. Si vous recevez ce=20 message par erreur, veuillez=20 s=E2=80=99il vous plait communiquer imm=C3=A9diatement=20 avec l=E2=80=99exp=C3=A9diteur et en=20 d=C3=A9truire tout exemplaire. De plus, il vous est=20 strictement interdit de=20 le divulguer, de le distribuer ou de le reproduire=20 sans l=E2=80=99autorisation=20 de l=E2=80=99exp=C3=A9diteur. Merci. Confidentiality notice This e-mail message and any attachment hereto contain confidential=20 information=20 which may be privileged and which is intended for the=20 exclusive use of its=20 addressee(s). If you receive this message in error, please inform sender=20 immediately and destroy any copy thereof.=20 Furthermore, any disclosure,=20 distribution or copying of this message=20 and/or any attachment hereto=20 without the consent of the sender is=20 strictly prohibited. Thank you. --000000000000a752020592430004 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
The STAMP test (As for RFC5357 TWAMP and for example Cisco= IP-SLA , Huawei U.2520, Juniper RPM and other in-line test functions) is i= ndeed intended to be used on production networks to enable the operator to = assess service level agreements based on delay, jitter and loss. So the rep= hrasing needs to be done keeping that in mind, and I see no implications on= using it over the Internet either. The agreement on UDP ports to use needs= to be done between the session-sender and the session-reflector only. Inte= rmediate nodes or other users of the network need not be aware of the STAMP= test or the ports it uses. It is in fact desirable that the STAMP packets = are not distinguishable=C2=A0from other traffic on the network, but are tre= ated just like any user traffic in the class of service they are transmitte= d.

Best
Henrik

On Wed, Sep 11, 2019 at 2:= 15 AM Barry Leiba <barryleiba= @computer.org> wrote:
Hi, Greg, and thanks for the response.

I think a minor rephrasing of the requirement isn't enough, really.
As I understand it now, after other discussion, it's not that you need<= br> agreement from the users, but that you should put a paragraph (or
maybe a separate section, to highlight the point) that says that this
is not intended for use on the open Internet nor on production
networks, and gives examples of what it *is* intended for... perhaps
test networks, production networks during advertised maintenance
windows, that sort of thing.=C2=A0 And then you don't need to say that = the
network's users need to agree, but simply that they need to be aware that performance testing will be happening during period X, and that
disruptions to normal network operation are possible.=C2=A0 You'd need = to
come up with text that the working group agrees with, of course, but I
think that if you do it will address my concern as well as some of the
others that were raised.

Does that make sense?

Barry

On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
> Hi Barry,
> thank you for your pointed question. Please find my explanation and th= e proposed updated below under the GIM>> tag.
>
> Regards,
> Greg
>
> On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker <noreply@ietf.org> wro= te:
>>
>> Barry Leiba has entered the following ballot position for
>> draft-ietf-ippm-stamp-07: Discuss
>>
>> When responding, please keep the subject line intact and reply to = all
>> email addresses included in the To and CC lines. (Feel free to cut= this
>> introductory paragraph, however.)
>>
>>
>> Please refer to https://www.ietf.o= rg/iesg/statement/discuss-criteria.html
>> for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here= :
>> https://datatracker.ietf.org/doc/dra= ft-ietf-ippm-stamp/
>>
>>
>>
>> ------------------------------------------------------------------= ----
>> DISCUSS:
>> ------------------------------------------------------------------= ----
>>
>> I'm sure this will be easy to either explain to me or re-phras= e:
>>
>> Sections 4 and 6 both say something like "MUST be agreed by a= ll users of the
>> network".=C2=A0 What does that really mean?=C2=A0 How is it r= emotely possible to get
>> agreement from all users of your network?=C2=A0 How is it remotely= possible that
>> they could understand what you're asking them to agree to?
>
>
> GIM>> Yes, looking at the bigger picture, at the Internet rather= than only at the domain where the test will be performed makes such condit= ion unattainable. Would s/network/network domain where the test is planned/= =C2=A0 so that it reads as:
>
> ... MUST be agreed by all users on the network domain where the test i= s planned ...
>
> make it clearer and the number of parties involved reasonable, practic= al?
> As for what the could be the question users will be asked, I think tha= t it should verify whether the application that has the port number assigne= d is active as the same number will be used as the destination port number = in the STAMP test.


--

Henrik Nydell
Sr Product Manager
1.866.685.8181
hnydell@accedian.= com
3D""
=3D""=C2=A03D""=C2=A03D""
3D""
accedian.com=

Avis de confidentialit=C3=A9

Les informations contenues dans le pr=C3=A9sent message et dans toute pi=C3=A8= ce qui=20 lui est jointe sont confidentielles et peuvent =C3=AAtre prot=C3=A9g=C3=A9e= s par le=20 secret professionnel. Ces informations sont =C3=A0 l=E2=80=99usage exclusif= de son ou de ses destinataires. Si vous recevez ce message par erreur, veuillez=20 s=E2=80=99il vous plait communiquer imm=C3=A9diatement avec l=E2=80=99exp= =C3=A9diteur et en=20 d=C3=A9truire tout exemplaire. De plus, il vous est strictement interdit de= =20 le divulguer, de le distribuer ou de le reproduire sans l=E2=80=99autorisat= ion=20 de l=E2=80=99exp=C3=A9diteur. Merci.

Confidentiality notice

This e-mail message and any attachment hereto contain confidential=20 information which may be privileged and which is intended for the=20 exclusive use of its addressee(s). If you receive this message in error, please inform sender immediately and destroy any copy thereof.=20 Furthermore, any disclosure, distribution or copying of this message=20 and/or any attachment hereto without the consent of the sender is=20 strictly prohibited. Thank you.

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Wed, 11 Sep 2019 09:36:50 +0000 From: Magnus Westerlund To: "hnydell@accedian.com" CC: "gregimirsky@gmail.com" , "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Thread-Topic: Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) Thread-Index: AQHVaBAbqbmUyWu4qEOdjey0JDZTiacmG9IAgAAKSACAABKdgA== Date: Wed, 11 Sep 2019 09:36:50 +0000 Message-ID: <716ce654b31739c3643a5235b1025766f602e60d.camel@ericsson.com> References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> In-Reply-To: Accept-Language: sv-SE, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=magnus.westerlund@ericsson.com; x-originating-ip: [192.176.1.81] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: db8d83b8-c07f-4a42-37c0-08d7369b92b6 x-microsoft-antispam: BCL:0; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Henrik, On Wed, 2019-09-11 at 10:30 +0200, Henrik Nydell wrote: > See below for PTP/NTP comment >=20 > On Wed, Sep 11, 2019 at 9:53 AM Magnus Westerlund < > magnus.westerlund@ericsson.com> wrote: > >=20 > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > >=20 > > > > 3. Section 4.1.1.: > > > > Timestamp is eight octets long field. STAMP node MUST > > > > support > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > format > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > support > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > timestamp > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > >=20 > > > > Is the clock source here something that may be relevant > > or > > > > simply > > > > information the management functions should capture. I > > > > think there is a > > > > similar issue to that of RTP faced when it comes to > > > > understand what the > > > > timestamp actually represent and thus be used > > correctly. > > > > RTP clock > > > > source specification is RFC 7273 > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > >=20 > > > GIM>> NTP and PTP encodings have a different interpretation of > > the > > > Fraction field of the Timestamp field. In my experience, PTP > > format > > > is native for the data plane, while NTP is more used at the > > control > > > plane. Original extension to TWAMP has been described in RFC > > 8186. > >=20 > > I think you missunderstood. When I talk about clock source, I am > > actually referring to identifying the particular clock that the > > node > > use to derive the included timestamp from.=20 > >=20 > > And likely this is a moot point in this document where the clock > > source > > information belongs in the management layer, e.g. in the YANG data > > model.=20 >=20 > =20 > In section 4.1.1 of draft-ietf-ippm-stamp there is a definition of > the Z-bit in the error correction field that denotes if the clock > source is NTP or PTP > =20 Yes, to be clear I have no issue with if the format is NTP or PTP. That was not my comment. It was a comment if the protocol should identify which particular NTP or PTP server the node is using. For example for a node on my network having NTP based clock it matters if that NTP server is sth1.ntp.se which is a stratum 1 server distributing certified swedish time, or if I use europe.pool.ntp.org where I would use any NTP server part of the pool indicating that they are in europe.=20 However, I am convinced that information is of interest the information should be in the management layer.=20 Cheers Magnus Westerlund=20 ---------------------------------------------------------------------- Network Architecture & Protocols, Ericsson Research ---------------------------------------------------------------------- Ericsson AB | Phone +46 10 7148287 Torshamnsgatan 23 | Mobile +46 73 0949079 SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com ---------------------------------------------------------------------- --=-JPsxgsTL4Vdux5dYuFip Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" 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Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.101.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156819523004.18526.9918164313234358441@ietfa.amsl.com> Date: Wed, 11 Sep 2019 02:47:10 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-ioam-data-07.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 09:47:10 -0000 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 : Data Fields for In-situ OAM Authors : Frank Brockners Shwetha Bhandari Carlos Pignataro Hannes Gredler John Leddy Stephen Youell Tal Mizrahi David Mozes Petr Lapukhov Remy Chang Daniel Bernier John Lemon Filename : draft-ietf-ippm-ioam-data-07.txt Pages : 41 Date : 2019-09-11 Abstract: In-situ Operations, Administration, and Maintenance (IOAM) records operational and telemetry information in the packet while the packet traverses a path between two points in the network. This document discusses the data fields and associated data types for in-situ OAM. In-situ OAM data fields can be embedded into a variety of transports such as NSH, Segment Routing, Geneve, native IPv6 (via extension header), or IPv4. In-situ OAM can be used to complement OAM mechanisms based on e.g. ICMP or other types of probe packets. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-data/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-07 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-ioam-data-07 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-ioam-data-07 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Wed Sep 11 02:52:49 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7F7DC120849; Wed, 11 Sep 2019 02:52:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.5 X-Spam-Level: X-Spam-Status: No, score=-14.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=VR4t1nbh; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=afifgkLY 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 8brJs7OfauEv; 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Wed, 11 Sep 2019 09:52:40 +0000 From: "Frank Brockners (fbrockne)" To: Haoyu Song , "draft-ietf-ippm-ioam-data@ietf.org" , IETF IPPM WG , Tom Herbert Thread-Topic: [ippm] Review on draft-ietf-ippm-ioam-data-06 Thread-Index: AdVRaVuwRvhTeI2VTDyRJBkRgBuuOwAPCiFABE81OsABaPFTMA== Date: Wed, 11 Sep 2019 09:52:40 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=fbrockne@cisco.com; x-originating-ip: [173.38.220.41] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 5b05d5c1-282c-47f2-cefd-08d7369dc8f3 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:DM6PR11MB3706; x-ms-traffictypediagnostic: DM6PR11MB3706: x-ms-exchange-purlcount: 2 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 5b05d5c1-282c-47f2-cefd-08d7369dc8f3 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Sep 2019 09:52:40.4152 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: dXZWquO+We6XJnRbbzM/i79CstxvkafFNI/XtM9M55DfEY43UVy9KpqvwgBPLFhgpJ+UrRRejIt/R7vtZiflRw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR11MB3706 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.37.102.22, xch-rcd-012.cisco.com X-Outbound-Node: rcdn-core-5.cisco.com Archived-At: Subject: Re: [ippm] Review on draft-ietf-ippm-ioam-data-06 X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 09:52:48 -0000 Thanks again for the review and comments. The most recent version - which i= ncludes the below mentioned pull request - is now available as -07: https://www.ietf.org/id/draft-ietf-ippm-ioam-data-07.txt Can we consider this one ready for WGLC? Thanks, Frank > -----Original Message----- > From: Frank Brockners (fbrockne) > Sent: Mittwoch, 4. September 2019 07:37 > To: 'Haoyu Song' ; 'draft-ietf-ippm-ioam- > data@ietf.org' ; 'IETF IPPM WG' > ; 'Tom Herbert' > Subject: RE: [ippm] Review on draft-ietf-ippm-ioam-data-06 >=20 >=20 > Thanks again detailed comments (special thanks to Tom and Haoyu). > There is a new pull request available which reflect these comments: > https://github.com/inband-oam/ietf/pull/133. Please review. > I'm hoping to get it merged by the end of this week. >=20 > Thanks, Frank >=20 > > -----Original Message----- > > From: Frank Brockners (fbrockne) > > Sent: Dienstag, 13. August 2019 09:08 > > To: Haoyu Song ; draft-ietf-ippm-ioam- > > data@ietf.org; IETF IPPM WG > > Subject: RE: [ippm] Review on draft-ietf-ippm-ioam-data-06 > > > > Hi Haoyu, > > > > Thanks for your comments. They key point you raise is consistent > > nomenclature > > - which we definitively need to address in the next revision. Not > > uncommon for a document with many different authors - but now is > > indeed the time to tidy things up and get the house in order. > > > > Thanks again, Frank > > > > > -----Original Message----- > > > From: Haoyu Song > > > Sent: Dienstag, 13. August 2019 02:00 > > > To: draft-ietf-ippm-ioam-data@ietf.org; IETF IPPM WG > > > Subject: [ippm] Review on draft-ietf-ippm-ioam-data-06 > > > > > > Dear IOAM data authors and IPPM WG, > > > > > > To sync up with the latest, I reread the draft and gave it a full rev= iew. > > > Some questions, comments, and suggestions are marked in the document. > > > Hopefully this can help to tighten the draft. > > > Thanks! > > > > > > Best regards, > > > Haoyu > > > From nobody Wed Sep 11 04:01:09 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7AF8B1200DE for ; Wed, 11 Sep 2019 04:01:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.646 X-Spam-Level: X-Spam-Status: No, score=-0.646 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_REMOTE_IMAGE=0.01, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=accedian-com.20150623.gappssmtp.com 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 WNF50U5tvVKo for ; Wed, 11 Sep 2019 04:01:03 -0700 (PDT) Received: from mail-vs1-xe2f.google.com (mail-vs1-xe2f.google.com [IPv6:2607:f8b0:4864:20::e2f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4D9A01200E9 for ; Wed, 11 Sep 2019 04:01:03 -0700 (PDT) Received: by mail-vs1-xe2f.google.com with SMTP id b123so13415722vsb.5 for ; Wed, 11 Sep 2019 04:01:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=accedian-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=EBxOLedrFtTZkWNyD+vqDBPt+MvNtOf7G5PNpul/0wM=; b=A1osKoms9Q4W3JmpeOlj7DCwP5nZC6k0ylH7vhRgpXPK6lLnBMTaIanapYU998sN9W czL/begizZPM/8JOPz1eb8CY+b5Gxph1RxkXNwHx61slDjwrA7Nz72tVzvoaRh3VyIdl AWiozenYiCUFNZ1KtuVKKSRTdf3auMOx3qz/GU6Ozd4B2h8VJYKeh+4nat2X5OO8sFEa b2Xy2npsBuV3edw06cjfSy4Y1INtMgSCoH9LhlrvVIsY5niI72EIXYvm3GHJGsVYWAv+ /ITVmSdoFIAN2Z4zWd+1+F//jv7FRMf7p+ealcL/0pKM3n8jZDuWhCcwO53WUVYii7kb Memg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=EBxOLedrFtTZkWNyD+vqDBPt+MvNtOf7G5PNpul/0wM=; b=bPDCNez9CO6rvCH+t/Qir4xgnEnx80GPyx/r9Uo+SwZd17h+ITVBIp2FR7iUasrMmv HkiOfwBlyYOimKBbXzORQiitFkqqcYEavFojxB/aBCMfo3DWrWp+D/9OQgv9d8Hi2GfF Vpf1gowFKegz/OTrLJikB82NBBObFLXEaZLyHevEcQ5qsGfTSnWc8RszQVzGwLhFvW1K XkjqsROWF6H9k29YgSOKuV1MTGdf/P08SLvtm5WDvYEg3DBfE9qtKGCzPUYTKPiyApSI H0Dwrfv9RFvLfqnq/qa0QyCUrCAvAdkNhKa86ceUfvwemPia7CEdrlPxb9eamyaiKm/l 4Kvg== X-Gm-Message-State: APjAAAX6RIFEezgr9Rv9Ruddxd7kiyNOaKkMj6jy7XBFkFpZdvnSwXes VoAc9f+xC+CJC+oKeBGXoN6BAPZdgGRMFwmEWSqJEDbVLEfpECikQS8Z9dG9CwOsBC6Y+Ajh3gg oJqEAngMzug== X-Google-Smtp-Source: APXvYqx6a2zlBUJOkj7YlfKIm86XSFfxM7dzZM1L5wU+tKcmOELJw/hYK9nEq/6eSCzaOgvH7Qd+loi+Hl7lsRuX32k= X-Received: by 2002:a67:2605:: with SMTP id m5mr19559687vsm.120.1568199662306; Wed, 11 Sep 2019 04:01:02 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> <716ce654b31739c3643a5235b1025766f602e60d.camel@ericsson.com> In-Reply-To: <716ce654b31739c3643a5235b1025766f602e60d.camel@ericsson.com> From: Henrik Nydell Date: Wed, 11 Sep 2019 13:00:50 +0200 Message-ID: To: Magnus Westerlund Cc: "gregimirsky@gmail.com" , "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Content-Type: multipart/alternative; boundary="000000000000cf1b0d059244ef75" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 11:01:08 -0000 --000000000000cf1b0d059244ef75 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Understood, yes I believe that is above the STAMP itself. It can be added as an optional TLV to STAMP if it is desirable to fetch this type of information from the reflector endpoints. On Wed, Sep 11, 2019 at 11:36 AM Magnus Westerlund < magnus.westerlund@ericsson.com> wrote: > Hi Henrik, > > On Wed, 2019-09-11 at 10:30 +0200, Henrik Nydell wrote: > > See below for PTP/NTP comment > > > > On Wed, Sep 11, 2019 at 9:53 AM Magnus Westerlund < > > magnus.westerlund@ericsson.com> wrote: > > > > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > > > > > > 3. Section 4.1.1.: > > > > > Timestamp is eight octets long field. STAMP node MUST > > > > > support > > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > > format > > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > > support > > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > > timestamp > > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > > > > > > Is the clock source here something that may be relevant > > > or > > > > > simply > > > > > information the management functions should capture. I > > > > > think there is a > > > > > similar issue to that of RTP faced when it comes to > > > > > understand what the > > > > > timestamp actually represent and thus be used > > > correctly. > > > > > RTP clock > > > > > source specification is RFC 7273 > > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > > > > > GIM>> NTP and PTP encodings have a different interpretation of > > > the > > > > Fraction field of the Timestamp field. In my experience, PTP > > > format > > > > is native for the data plane, while NTP is more used at the > > > control > > > > plane. Original extension to TWAMP has been described in RFC > > > 8186. > > > > > > I think you missunderstood. When I talk about clock source, I am > > > actually referring to identifying the particular clock that the > > > node > > > use to derive the included timestamp from. > > > > > > And likely this is a moot point in this document where the clock > > > source > > > information belongs in the management layer, e.g. in the YANG data > > > model. > > > > > > In section 4.1.1 of draft-ietf-ippm-stamp there is a definition of > > the Z-bit in the error correction field that denotes if the clock > > source is NTP or PTP > > > > Yes, to be clear I have no issue with if the format is NTP or PTP. That > was not my comment. It was a comment if the protocol should identify > which particular NTP or PTP server the node is using. For example for a > node on my network having NTP based clock it matters if that NTP server > is sth1.ntp.se which is a stratum 1 server distributing certified > swedish time, or if I use europe.pool.ntp.org where I would use any NTP > server part of the pool indicating that they are in europe. > > > However, I am convinced that information is of interest the information > should be in the management layer. > > > Cheers > > Magnus Westerlund > > > ---------------------------------------------------------------------- > Network Architecture & Protocols, Ericsson Research > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Torshamnsgatan 23 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > --=20 *Henrik Nydell* *Sr Product Manager* 1.866.685.8181 hnydell@accedian.com *accedian.com * --=20 Avis de confidentialit=C3=A9 Les informations contenues dans le pr=C3=A9sent=20 message et dans toute pi=C3=A8ce qui=20 lui est jointe sont confidentielles et=20 peuvent =C3=AAtre prot=C3=A9g=C3=A9es par le=20 secret professionnel. Ces informations sont=20 =C3=A0 l=E2=80=99usage exclusif de son ou de ses destinataires. Si vous recevez ce=20 message par erreur, veuillez=20 s=E2=80=99il vous plait communiquer imm=C3=A9diatement=20 avec l=E2=80=99exp=C3=A9diteur et en=20 d=C3=A9truire tout exemplaire. De plus, il vous est=20 strictement interdit de=20 le divulguer, de le distribuer ou de le reproduire=20 sans l=E2=80=99autorisation=20 de l=E2=80=99exp=C3=A9diteur. Merci. Confidentiality notice This e-mail message and any attachment hereto contain confidential=20 information=20 which may be privileged and which is intended for the=20 exclusive use of its=20 addressee(s). If you receive this message in error, please inform sender=20 immediately and destroy any copy thereof.=20 Furthermore, any disclosure,=20 distribution or copying of this message=20 and/or any attachment hereto=20 without the consent of the sender is=20 strictly prohibited. Thank you. --000000000000cf1b0d059244ef75 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Understood, yes I believe that is above the STAMP itself. = It can be added as an optional TLV to STAMP if it is desirable to fetch thi= s type of information from the reflector endpoints.

On Wed, Sep 11, 2019 at = 11:36 AM Magnus Westerlund <magnus.westerlund@ericsson.com> wrote:
Hi Henrik,

On Wed, 2019-09-11 at 10:30 +0200, Henrik Nydell wrote:
> See below for PTP/NTP comment
>
> On Wed, Sep 11, 2019 at 9:53 AM Magnus Westerlund <
> ma= gnus.westerlund@ericsson.com> wrote:
> >
> > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote:
> >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.=C2=A0 Section 4.1.1.:
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Timestamp is eight oct= ets long field.=C2=A0 STAMP node MUST
> > > > support
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0Network Time Protocol (NTP) v= ersion 4 64-bit timestamp
> > format
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC5905], the format used in= [RFC5357].=C2=A0 STAMP node MAY
> > > > support
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0IEEE 1588v2 Precision Time Pr= otocol truncated 64-bit
> > > > timestamp
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0format [IEEE.1588.2008], the = format used in [RFC8186].
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the clock source he= re something that may be relevant
> > or
> > > > simply
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0information the manage= ment functions should capture. I
> > > > think there is a
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0similar issue to that = of RTP faced when it comes to
> > > > understand what the
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0timestamp actually rep= resent and thus be used
> > correctly.
> > > > RTP clock
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0source specification i= s RFC 7273
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(https= ://datatracker.ietf.org/doc/rfc7273/)
> > >
> > > GIM>> NTP and PTP encodings have a different interpret= ation of
> > the
> > > Fraction field of the Timestamp field. In my experience, PTP=
> > format
> > > is native for the data plane, while NTP is more used at the<= br> > > control
> > > plane. Original extension to TWAMP has been described in RFC=
> > 8186.
> >
> > I think you missunderstood. When I talk about clock source, I am<= br> > > actually referring to identifying the particular clock that the > > node
> > use to derive the included timestamp from.
> >
> > And likely this is a moot point in this document where the clock<= br> > > source
> > information belongs in the management layer, e.g. in the YANG dat= a
> > model.
>
>=C2=A0
> In section 4.1.1 of draft-ietf-ippm-stamp there is a definition of
> the Z-bit in the error correction field that denotes if the clock
> source is NTP or PTP
>=C2=A0

Yes, to be clear I have no issue with if the format is NTP or PTP. That
was not my comment. It was a comment if the protocol should identify
which particular NTP or PTP server the node is using. For example for a
node on my network having NTP based clock it matters if that NTP server
is sth1= .ntp.se which is a stratum 1 server distributing certified
swedish time, or if I use europe.pool.ntp.org where I would use any NT= P
server part of the pool indicating that they are in europe.


However, I am convinced that information is of interest the information
should be in the management layer.


Cheers

Magnus Westerlund


----------------------------------------------------------------------
Network Architecture & Protocols, Ericsson Research
----------------------------------------------------------------------
Ericsson AB=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| = Phone=C2=A0 +46 10 7148287
Torshamnsgatan 23=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| Mobile +46 73 0= 949079
SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------



--

Henrik Nydell
Sr Product Manager
1.866.685.8181
hnydell@accedian.= com
3D""
=3D""=C2=A03D""=C2=A03D""
3D""
accedian.com=

Avis de confidentialit=C3=A9

Les informations contenues dans le pr=C3=A9sent message et dans toute pi=C3=A8= ce qui=20 lui est jointe sont confidentielles et peuvent =C3=AAtre prot=C3=A9g=C3=A9e= s par le=20 secret professionnel. Ces informations sont =C3=A0 l=E2=80=99usage exclusif= de son ou de ses destinataires. Si vous recevez ce message par erreur, veuillez=20 s=E2=80=99il vous plait communiquer imm=C3=A9diatement avec l=E2=80=99exp= =C3=A9diteur et en=20 d=C3=A9truire tout exemplaire. De plus, il vous est strictement interdit de= =20 le divulguer, de le distribuer ou de le reproduire sans l=E2=80=99autorisat= ion=20 de l=E2=80=99exp=C3=A9diteur. Merci.

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--000000000000cf1b0d059244ef75-- From nobody Wed Sep 11 08:25:26 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1FDCD120110; Wed, 11 Sep 2019 08:25:25 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.755 X-Spam-Level: X-Spam-Status: No, score=-0.755 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 YHbvBj1uu7rq; Wed, 11 Sep 2019 08:25:21 -0700 (PDT) Received: from mail-lj1-x22d.google.com (mail-lj1-x22d.google.com [IPv6:2a00:1450:4864:20::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 54579120152; Wed, 11 Sep 2019 08:25:21 -0700 (PDT) Received: by mail-lj1-x22d.google.com with SMTP id q22so15826001ljj.2; Wed, 11 Sep 2019 08:25:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=rfGN+vgas7BfMwsfMqzh1/AHkD7cv2ZBNdIh1nte9+g=; b=umtHVAfdfYOmjVlQL9OWgrs4KFsETN2Megjiw+EAOYHDbjSnYuZXixKoQDXGvYgDdV pKk9ivV8uBfUztycLeQCd6F29rLt37ai0cOx068u2vcCmsI6zBmA8GTkeeaSXJsfHWPx 4EsKqHVI2vdgFLSYy2rvIZ+AKFBJ1HtnjBiFt5cF58LsyZvsUv13cK1hFdGr0AvGaTlI xWhi1ZMoElTCLHF5tWNfc/wzDRXfIkmx8YM+rE6jx7VAhHQFOkFx+WGTPyDvurOLfRag ULsDzHhjhjMkqsHgixpMVMchdPlzp/311cWyL5vamFviYeIyyCn7Fb/ztwy8jrTdgg5i PeIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=rfGN+vgas7BfMwsfMqzh1/AHkD7cv2ZBNdIh1nte9+g=; b=fDFXAjq9ZQjUqlQhHEOGL8zydG/PARXAdHVDkts/2SJbJ+F61/ZWiSf4L/jwOrk62M 5EDctSheBzUP0IiAMoOc/CoQKgzNzY6lNO4i6WbmiE+37QlZKkIBYEeIxoCVCL77Fdf7 TJzM1WeKKkaH+CnkeGpwXWYhTlpp5ZfD8sDyecf8s7b9YJWdn8DrXMoMg/z+NSdyvWVq R1j2gmNjqJP0zD4WpL8Dw2knokHpB2A65Iwh5IupBnjQP9kAetsY6WFuNN3lVbiw+MNY BJaK4/rmDTpKgXh74IDeMJIwbzj2/Mn3OUoVAK9XbQFUYPCwb4KG0IkBNwFD+Sxjx17F v8gg== X-Gm-Message-State: APjAAAWlgpN8A84kFlc6UfYwjR6YJvDHnQohYOW99QV66D6t0lHkSwcX yA69xLxhiTw82Z7GotSRQCBpd3zzA8rDAFg3Yqo= X-Google-Smtp-Source: APXvYqxszU5ZJB3LfMULhpTaeMhueRw5wYmWqrgYorGznr/0mDXEhn0nCCzSJZBk6CT8fOmwRuHjR1n6UJvulHP+ZOg= X-Received: by 2002:a2e:3201:: with SMTP id y1mr20326689ljy.177.1568215519438; Wed, 11 Sep 2019 08:25:19 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> <716ce654b31739c3643a5235b1025766f602e60d.camel@ericsson.com> In-Reply-To: <716ce654b31739c3643a5235b1025766f602e60d.camel@ericsson.com> From: Greg Mirsky Date: Wed, 11 Sep 2019 08:25:06 -0700 Message-ID: To: Magnus Westerlund Cc: "hnydell@accedian.com" , "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Content-Type: multipart/alternative; boundary="000000000000f7af25059248a05d" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 15:25:25 -0000 --000000000000f7af25059248a05d Content-Type: text/plain; charset="UTF-8" Hi Magnus, thank you for the clarification of the question. As Henrik already noted, in an effort to characterize the source of ingress and egress timestamps at the Session-Reflector we've introduced the Timestamp Information TLV (Section 4.3 in draft-ietf-ippm-stamp-option-tlv). It does not provide the name/location of the clock master/synchronization source, only a clock synchronization protocol and the method by which the timestamp is obtained. Much appreciate your comments, suggestions to make that TLV more useful. Regards, Greg On Wed, Sep 11, 2019 at 2:36 AM Magnus Westerlund < magnus.westerlund@ericsson.com> wrote: > Hi Henrik, > > On Wed, 2019-09-11 at 10:30 +0200, Henrik Nydell wrote: > > See below for PTP/NTP comment > > > > On Wed, Sep 11, 2019 at 9:53 AM Magnus Westerlund < > > magnus.westerlund@ericsson.com> wrote: > > > > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > > > > > > 3. Section 4.1.1.: > > > > > Timestamp is eight octets long field. STAMP node MUST > > > > > support > > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > > format > > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > > support > > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > > timestamp > > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > > > > > > Is the clock source here something that may be relevant > > > or > > > > > simply > > > > > information the management functions should capture. I > > > > > think there is a > > > > > similar issue to that of RTP faced when it comes to > > > > > understand what the > > > > > timestamp actually represent and thus be used > > > correctly. > > > > > RTP clock > > > > > source specification is RFC 7273 > > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > > > > > GIM>> NTP and PTP encodings have a different interpretation of > > > the > > > > Fraction field of the Timestamp field. In my experience, PTP > > > format > > > > is native for the data plane, while NTP is more used at the > > > control > > > > plane. Original extension to TWAMP has been described in RFC > > > 8186. > > > > > > I think you missunderstood. When I talk about clock source, I am > > > actually referring to identifying the particular clock that the > > > node > > > use to derive the included timestamp from. > > > > > > And likely this is a moot point in this document where the clock > > > source > > > information belongs in the management layer, e.g. in the YANG data > > > model. > > > > > > In section 4.1.1 of draft-ietf-ippm-stamp there is a definition of > > the Z-bit in the error correction field that denotes if the clock > > source is NTP or PTP > > > > Yes, to be clear I have no issue with if the format is NTP or PTP. That > was not my comment. It was a comment if the protocol should identify > which particular NTP or PTP server the node is using. For example for a > node on my network having NTP based clock it matters if that NTP server > is sth1.ntp.se which is a stratum 1 server distributing certified > swedish time, or if I use europe.pool.ntp.org where I would use any NTP > server part of the pool indicating that they are in europe. > > > However, I am convinced that information is of interest the information > should be in the management layer. > > > Cheers > > Magnus Westerlund > > > ---------------------------------------------------------------------- > Network Architecture & Protocols, Ericsson Research > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Torshamnsgatan 23 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > --000000000000f7af25059248a05d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi=C2=A0Magnus,
thank you for the clarification of the= question. As Henrik already noted, in an effort to characterize the source= of ingress and egress timestamps at the Session-Reflector we've introd= uced the Timestamp Information TLV (Section 4.3 in draft-ietf-ippm-stamp-op= tion-tlv). It does not provide the name/location of the clock master/synchr= onization source, only a clock synchronization protocol and the method by w= hich the timestamp is obtained. Much appreciate your comments, suggestions = to make that TLV more useful.

Regards,
G= reg

On Wed, Sep 11, 2019 at 2:36 AM Magnus Westerlund <magnus.westerlund@ericsson.com>= ; wrote:
Hi Henr= ik,

On Wed, 2019-09-11 at 10:30 +0200, Henrik Nydell wrote:
> See below for PTP/NTP comment
>
> On Wed, Sep 11, 2019 at 9:53 AM Magnus Westerlund <
> ma= gnus.westerlund@ericsson.com> wrote:
> >
> > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote:
> >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.=C2=A0 Section 4.1.1.:
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Timestamp is eight oct= ets long field.=C2=A0 STAMP node MUST
> > > > support
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0Network Time Protocol (NTP) v= ersion 4 64-bit timestamp
> > format
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC5905], the format used in= [RFC5357].=C2=A0 STAMP node MAY
> > > > support
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0IEEE 1588v2 Precision Time Pr= otocol truncated 64-bit
> > > > timestamp
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0format [IEEE.1588.2008], the = format used in [RFC8186].
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the clock source he= re something that may be relevant
> > or
> > > > simply
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0information the manage= ment functions should capture. I
> > > > think there is a
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0similar issue to that = of RTP faced when it comes to
> > > > understand what the
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0timestamp actually rep= resent and thus be used
> > correctly.
> > > > RTP clock
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0source specification i= s RFC 7273
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(https= ://datatracker.ietf.org/doc/rfc7273/)
> > >
> > > GIM>> NTP and PTP encodings have a different interpret= ation of
> > the
> > > Fraction field of the Timestamp field. In my experience, PTP=
> > format
> > > is native for the data plane, while NTP is more used at the<= br> > > control
> > > plane. Original extension to TWAMP has been described in RFC=
> > 8186.
> >
> > I think you missunderstood. When I talk about clock source, I am<= br> > > actually referring to identifying the particular clock that the > > node
> > use to derive the included timestamp from.
> >
> > And likely this is a moot point in this document where the clock<= br> > > source
> > information belongs in the management layer, e.g. in the YANG dat= a
> > model.
>
>=C2=A0
> In section 4.1.1 of draft-ietf-ippm-stamp there is a definition of
> the Z-bit in the error correction field that denotes if the clock
> source is NTP or PTP
>=C2=A0

Yes, to be clear I have no issue with if the format is NTP or PTP. That
was not my comment. It was a comment if the protocol should identify
which particular NTP or PTP server the node is using. For example for a
node on my network having NTP based clock it matters if that NTP server
is sth1= .ntp.se which is a stratum 1 server distributing certified
swedish time, or if I use europe.pool.ntp.org where I would use any NT= P
server part of the pool indicating that they are in europe.


However, I am convinced that information is of interest the information
should be in the management layer.


Cheers

Magnus Westerlund


----------------------------------------------------------------------
Network Architecture & Protocols, Ericsson Research
----------------------------------------------------------------------
Ericsson AB=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| = Phone=C2=A0 +46 10 7148287
Torshamnsgatan 23=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| Mobile +46 73 0= 949079
SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------

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The = chairs believe that it is the overall consensus of the group that this = document should be adopted as a WG item. There were many good points and = reviews raised, particularly around the loopback option. We would like = to see this feedback incorporated into the draft-ietf-ippm-ioam-flags-00 = version. We can continue iterating there. Authors, please create an updated document and submit as a WG document. Best, Tommy (as IPPM co-chair) > On Jul 25, 2019, at 11:07 AM, Brian Trammell (IETF) = wrote: >=20 > hi Greg, >=20 > Thanks for the feedback; absolutely, we can do this the normal way. = Authors: let's do a normal two-week adoption call for this document = before publishing the update. >=20 > This adoption call starts now. >=20 > IPPM, please respond to this message with an indication to the mailing = list of your support for adopting draft-mizrahi-ippm-ioam-flags as a = working group document, in partial fulfillment of our charter milestone = "submit a Standards Track draft on inband OAM based measurement = methodologies to the IESG" (obviously, depending on how many documents = we end up sending to the IESG, we may have to change the plurality of = this milestone). If you do not support this, please send a message to = the list explaining why. >=20 > Thanks, cheers, >=20 > Brian (as IPPM co-chair) >=20 >=20 >> On 25 Jul 2019, at 13:15, Greg Mirsky wrote: >>=20 >> Dear Chairs, et al., >> I appreciate that editors of draft-ietf-ippm-ioam-data followed on = the decision of the WG reached at the meeting in Prague to extract = material not directly related to the definition of iOAM data elements = from the document. The new draft was presented earlier this week and = generated many comments. I feel that it would be right to discuss the = draft and its relevance to the charter of the IPPM WG before starting WG = adoption poll. >>=20 >> Regards, >> Greg >=20 > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm From nobody Wed Sep 11 09:11:06 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AC4F3120967; Wed, 11 Sep 2019 09:11:04 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.001 X-Spam-Level: X-Spam-Status: No, score=-2.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=apple.com 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 Hf8bqsGWKQXn; Wed, 11 Sep 2019 09:11:03 -0700 (PDT) Received: from nwk-aaemail-lapp01.apple.com (nwk-aaemail-lapp01.apple.com [17.151.62.66]) (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 F2E57120930; Wed, 11 Sep 2019 09:10:59 -0700 (PDT) Received: from pps.filterd (nwk-aaemail-lapp01.apple.com [127.0.0.1]) by nwk-aaemail-lapp01.apple.com (8.16.0.27/8.16.0.27) with SMTP id x8BG7Djt026481; Wed, 11 Sep 2019 09:10:58 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=apple.com; h=sender : from : content-type : content-transfer-encoding : mime-version : subject : message-id : date : cc : to; s=20180706; bh=h5bk6XIlQ2SjdwlGSXrV4XTbIadG5jLkTPhclsdk/EA=; b=EPixVitmtbsyElz9bk6d50kC40X2bZ1d+FMRuVOMzuA5hXJnzCedpUzGBlXYVZbnO5kG EeK0a4seC+QoqNYb5YcV5lu7rZUR+tyqfgBIgMQPJ+4MoPYHkONzQJI4Z0Sf6Qt0y70y il7Nd36rnvBHBk63ICjXeazhqeLcFsa7D6aIFkI/4Nj33HxJyfUH3QFwfb8Dn5DgpRw6 jOofp5fQW0sjXya+EU5B74/TCT8ySkdLSz1afzkLaIdkyRAGcn2K+rg94h0pIdEdYD8E SsHsV4DWeGqPHCN6R4kCxq341pLMZqgK/vemJx3dO+gpNd1XZvwhOCX36ZQBvWcBvU0j OA== Received: from ma1-mtap-s02.corp.apple.com (ma1-mtap-s02.corp.apple.com [17.40.76.6]) by nwk-aaemail-lapp01.apple.com with ESMTP id 2uvbgg9sjr-8 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Wed, 11 Sep 2019 09:10:58 -0700 Received: from nwk-mmpp-sz11.apple.com (nwk-mmpp-sz11.apple.com [17.128.115.155]) by ma1-mtap-s02.corp.apple.com (Oracle Communications Messaging Server 8.0.2.4.20190507 64bit (built May 7 2019)) with ESMTPS id <0PXO00I4CCY13P70@ma1-mtap-s02.corp.apple.com>; Wed, 11 Sep 2019 09:10:51 -0700 (PDT) Received: from process_milters-daemon.nwk-mmpp-sz11.apple.com by nwk-mmpp-sz11.apple.com (Oracle Communications Messaging Server 8.0.2.4.20190507 64bit (built May 7 2019)) id <0PXO00L00CX13F00@nwk-mmpp-sz11.apple.com>; Wed, 11 Sep 2019 09:10:50 -0700 (PDT) X-Va-A: X-Va-T-CD: 159681ac17b4bf28eab1955e26a63a9c X-Va-E-CD: 3f24e08570409e5661cdbbb75bc14a30 X-Va-R-CD: 8fb1a4ed12954952581b378f2ead1475 X-Va-CD: 0 X-Va-ID: 0765c95a-8f0e-4f9c-99ee-a8f6d95f4a90 X-V-A: X-V-T-CD: 159681ac17b4bf28eab1955e26a63a9c X-V-E-CD: 3f24e08570409e5661cdbbb75bc14a30 X-V-R-CD: 8fb1a4ed12954952581b378f2ead1475 X-V-CD: 0 X-V-ID: 983b5906-f4e3-439f-8752-1fac88d0567e X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-09-11_08:,, signatures=0 Received: from [17.234.11.198] by nwk-mmpp-sz11.apple.com (Oracle Communications Messaging Server 8.0.2.4.20190507 64bit (built May 7 2019)) with ESMTPSA id <0PXO00KEHCY12P60@nwk-mmpp-sz11.apple.com>; Wed, 11 Sep 2019 09:10:49 -0700 (PDT) Sender: tpauly@apple.com From: Tommy Pauly Content-type: text/plain; charset=us-ascii Content-transfer-encoding: quoted-printable MIME-version: 1.0 (Mac OS X Mail 12.4 \(3445.104.2\)) Message-id: Date: Wed, 11 Sep 2019 09:10:41 -0700 Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org To: IETF IPPM WG X-Mailer: Apple Mail (2.3445.104.2) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-11_08:, , signatures=0 Archived-At: Subject: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 16:11:05 -0000 Hello IPPM, This email starts a working group adoption call for = draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the = IPv6 option encapsulation for IOAM data. This document was discussed = with the 6man WG, which advised that the work be done in ippm, with = review by 6man. The documents are available here: = https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-option= s/ = https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 Please reply to this email by Wednesday, September 25, with your input = on whether or not the WG should adopt this document. Best, Tommy (as IPPM co-chair)= From nobody Wed Sep 11 09:11:34 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 29B18120A28; Wed, 11 Sep 2019 09:11:32 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: IETF Secretariat To: , , X-Test-IDTracker: no X-IETF-IDTracker: 6.101.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <156821829216.13409.14618912774359493548.idtracker@ietfa.amsl.com> Date: Wed, 11 Sep 2019 09:11:32 -0700 Archived-At: Subject: [ippm] The IPPM WG has placed draft-ioametal-ippm-6man-ioam-ipv6-options in state "Call For Adoption By WG Issued" X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 16:11:32 -0000 The IPPM WG has placed draft-ioametal-ippm-6man-ioam-ipv6-options in state Call For Adoption By WG Issued (entered by Tommy Pauly) The document is available at https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/ From nobody Wed Sep 11 09:35:54 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 18399120AB0; 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Wed, 11 Sep 2019 16:35:44 +0000 From: "Frank Brockners (fbrockne)" To: "tpauly@apple.com" , IETF IPPM WG CC: "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" Thread-Topic: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaLuOHFOQIvT8zk6NjoTL7UFNuKcmrCbg Date: Wed, 11 Sep 2019 16:35:44 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=fbrockne@cisco.com; x-originating-ip: [173.38.220.41] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 804a6a0c-a643-46bf-38c5-08d736d617d8 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:DM6PR11MB2620; x-ms-traffictypediagnostic: DM6PR11MB2620: x-ms-exchange-purlcount: 2 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7219; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 804a6a0c-a643-46bf-38c5-08d736d617d8 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Sep 2019 16:35:44.5762 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: /UkbDnyDbBCJK84PL6DdsgbtkamRXfWdfju/SWdmIH0WNpoG7fhbKyeTwHJhY2FFW5C+jIriejG/G58+OBh52w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR11MB2620 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.36.7.13, xch-aln-003.cisco.com X-Outbound-Node: alln-core-8.cisco.com Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 16:35:53 -0000 I support adoption of the two documents as WG documents (as co-author). Frank > -----Original Message----- > From: tpauly@apple.com > Sent: Mittwoch, 11. September 2019 18:11 > To: IETF IPPM WG > Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org > Subject: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options >=20 > Hello IPPM, >=20 > This email starts a working group adoption call for draft-ioametal-ippm-6= man- > ioam-ipv6-options. This document defines the IPv6 option encapsulation fo= r > IOAM data. This document was discussed with the 6man WG, which advised th= at > the work be done in ippm, with review by 6man. >=20 > The documents are available here: >=20 > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-optio= ns/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 >=20 > Please reply to this email by Wednesday, September 25, with your input on > whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) From nobody Wed Sep 11 11:14:32 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6668F120BD6; Wed, 11 Sep 2019 11:14:31 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.5 X-Spam-Level: X-Spam-Status: No, score=-14.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); 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Wed, 11 Sep 2019 18:24:14 +0000 From: "Rajiv Asati (rajiva)" To: Tommy Pauly CC: IETF IPPM WG , "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" Thread-Topic: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaLuO6nEqvZnlakC408O1Zv8y0qcmysOw Date: Wed, 11 Sep 2019 18:24:14 +0000 Message-ID: <14BB8BBF-E44B-4E45-80D7-07A943EA9501@cisco.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=rajiva@cisco.com; x-originating-ip: [173.38.117.93] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0fb42de9-ab92-4ccc-1893-08d736e53ff3 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:BL0PR11MB3508; x-ms-traffictypediagnostic: BL0PR11MB3508: x-ms-exchange-purlcount: 2 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8273; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 0fb42de9-ab92-4ccc-1893-08d736e53ff3 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Sep 2019 18:24:14.2512 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Re+BqAAJfcFGejS6kPrC30uidub243TVjUs98n+9fy98INgMPnx+gNHUHkInPyDWXoasCdzudkdy0z7KV+zXXA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR11MB3508 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.37.102.13, xch-rcd-003.cisco.com X-Outbound-Node: rcdn-core-7.cisco.com Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 18:24:20 -0000 Support.=20 Cheers, Rajiv =20 > On Sep 11, 2019, at 12:11 PM, Tommy Pauly wrote: >=20 > Hello IPPM, >=20 > This email starts a working group adoption call for draft-ioametal-ippm-6= man-ioam-ipv6-options. This document defines the IPv6 option encapsulation = for IOAM data. This document was discussed with the 6man WG, which advised = that the work be done in ippm, with review by 6man. >=20 > The documents are available here: >=20 > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-optio= ns/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 >=20 > Please reply to this email by Wednesday, September 25, with your input on= whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) From nobody Wed Sep 11 11:33:53 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 40974120C11; Wed, 11 Sep 2019 11:33:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.755 X-Spam-Level: X-Spam-Status: No, score=-0.755 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 wWKBqtuej3br; Wed, 11 Sep 2019 11:33:48 -0700 (PDT) Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EDE17120C0F; Wed, 11 Sep 2019 11:33:47 -0700 (PDT) Received: by mail-lj1-x241.google.com with SMTP id d5so20973819lja.10; Wed, 11 Sep 2019 11:33:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=RM7gmrU2ynGJRPhAtLzwvnY+2kLlapo0sKyB61BaTOQ=; b=vG2t3gLAp5EU4QVUoYVSLeHVAP14O7HJDgH9kJEppyZWML3wAjMBozB96F3bGS2YQB 6Lr2dzXFkpmjzBsl4mHifrJaJmKJTAF+8eOZ5FamB91UCz6a7Ub/iAOCtcEqO8y3Jem4 et8l+XqzTZWiVD7SprY9yws/QSt08vGJ+X+w2hW9D+8KoSBuSRhGSPxVTsv9uFK9JT6R zcAkLmhcWChqSk5Rxq5L9Bzg1OaU2zA4wSIjAGKXENxWhrnK9YPEWbHRcQOPonQlJ7co EYMBw8gGUMH7nIChMJ3M7JhD8L4dfZAVPUsyNJYqAPBLvl8yxu7ENfJJziyNdwTuS+vZ xAhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=RM7gmrU2ynGJRPhAtLzwvnY+2kLlapo0sKyB61BaTOQ=; b=Gi7HRA+TE6OJTwLfvyCHdv2lCG4jImVB+Ys4iRNEjfqD4vaP/Jy1MVQjZnBrJ0s6TS J0/HbIk124ltoo5OcJmPCjLeYDVNTJZhLSMU1qzcaVvGtUUeoQTdeJxprapFgmfv1TIG 8V9F+FmRva8RQGFK7wGyDcS/WEz9zsmq+82UasQgAsBab9ZeBhs94D4cQgQykGg7uch5 DqKRbOq4sudzFUF5+Zjl2pc7CrLKFGc/hBHSIGMdeZQZaslfePky/M2OIqFBrTzG0Q22 sHDSGZMCyxVOaonCJlb57rHUJCVryDa7A5Gweari7tnYxl1tmYTGPNx75XaZAmZH1xga zidA== X-Gm-Message-State: APjAAAUcS/vIW8Drgs3be31kTKm0cPC9m1TTGygrsnE01Vz/SfVTUDbh OeO9BSD6TEH02s5oNkiwr9kSoOwqIN2K6o3Bi+Q= X-Google-Smtp-Source: APXvYqxODrWkhjBCS8L0zJi1Y+/rMbb/HyrsSVOR7ijdmCOLjMTqzLPthVj5O/39cKnO7EGCZeRbyjzP2YPhXWD8SGM= X-Received: by 2002:a2e:9006:: with SMTP id h6mr3810310ljg.42.1568226825921; Wed, 11 Sep 2019 11:33:45 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> In-Reply-To: <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> From: Greg Mirsky Date: Wed, 11 Sep 2019 11:33:34 -0700 Message-ID: To: Magnus Westerlund Cc: "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Content-Type: multipart/alternative; boundary="000000000000e2ebac05924b42f0" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 18:33:52 -0000 --000000000000e2ebac05924b42f0 Content-Type: text/plain; charset="UTF-8" Hi Magnus, thank you for clarifications and further detailing your comments, questions. Please find my answers and notes below in-lined under the GIM2>> tag. Regards, Greg On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund < magnus.westerlund@ericsson.com> wrote: > Hi Greg, > > Thanks for the reply. See inline for my comments and response. > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > Hi Magnus, > > thank you for the review and thoughtful, pointed questions. Please > > find my answers in-line under GIM>> tag. > > > > Regards, > > Greg > > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker < > > noreply@ietf.org> wrote: > > > Magnus Westerlund has entered the following ballot position for > > > draft-ietf-ippm-stamp-07: Discuss > > > > > > When responding, please keep the subject line intact and reply to > > > all > > > email addresses included in the To and CC lines. (Feel free to cut > > > this > > > introductory paragraph, however.) > > > > > > > > > Please refer to > > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > > for more information about IESG DISCUSS and COMMENT positions. > > > > > > > > > The document, along with other ballot positions, can be found here: > > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > > > > > > > > > ----------------------------------------------------------------- > > > ----- > > > DISCUSS: > > > ----------------------------------------------------------------- > > > ----- > > > > > > Two very much discussing discusses. However, I would really like to > > > hear the > > > answer to these concerns before clearing. > > > > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If > > > there ever > > > would exist a need to deploy another integrity solution, even if > > > the actual > > > algorithm used to construct the tag can be agreed by the > > > management, there > > > appear to exist a hard look in to use 16-byte tags. Have this issue > > > been > > > considered? > > > > GIM>> Indeed, this specification defines the use of only one > > algorithm and only 16 bytes-long HMAC field. Your question prompted > > the discussion among authors and we believe that in a future > > specification it would be feasible to extend supporting a number of > > algorithms and different lengths of HMAC field both being defined > > through extension to STAMP YANG data model. > > So if I understand this (taking a discussion with Mirja about keeping > things as simple as possible) the solution is to basically is when need > arises define a new STAMP version, and then use YANG to coordinate > which version is used for the measurement. If that is a correct re- > interpretation of your response then I am fine with it. > GIM2>> The direction from the WG was to keep the base specification as simple as possible (and that was the reason to split TLV extensions into a separate document). > > > > 2. Section 6: > > > The possible impact of the > > > STAMP test packets on the network MUST be thoroughly analyzed, > > > and > > > the use of STAMP for each case MUST be agreed by all users on > > > the > > > network before starting the STAMP test session. > > > > > > I assume some potential issues are know, shouldn't they > > > really be > > > listed here in the security consideration to further > > > motivate why the > > > analysis needs to happen. > > > > GIM>> This is in reference to using numbers from the User range as > > the destination port number. Would adding the reference to the case > > of using the port numbers from the User range address your concern? > > Or rather refer to Section 4, as it includes more discussion (see > > below)? > > Okay, I don't really care where the discussion happens. But I don't > find any real discussion and listing of the concerns with using user or > dynamic ports for STAMP Sessions? With the formulation you use, I would > expect at least some list of potential concerns that needs to be > evaluated in the context of the particular usage of STAMP. > GIM2>> Per Berry's suggestion, I'm adding a new section, Operational Considerations, to list possible scenarios and possible issues with using destination ports from the User range and from the Dynamic range. I hope to finish it in a couple days. Will share on this discussion thread promptly. > > > > > > > ----------------------------------------------------------------- > > > ----- > > > COMMENT: > > > ----------------------------------------------------------------- > > > ----- > > > > > > 1. Section 4: > > > Before using numbers from the User Ports range, the > > > possible impact > > > on the network MUST be carefully studied and agreed by all users > > > of > > > the network. > > > > > > Is the above sentence missing to list an important > > > assumption? Is the > > > assumption that by using the registred destination port an > > > operator > > > that sees to much STAMP traffic can simply filter it out > > > and that way > > > deal with the traffic, something which is not possible when > > > using an > > > locally decided port? If that is the case, this assumption > > > should > > > probably be noted. > > > > GIM>> That is a very good point but our primary motivation for this > > cautionary note (or strong warning) was that by allowing STAMP to use > > port numbers from the User range, ports that may be already assigned > > to protocols, creates a DDOS attack vector. As for the filtering > > STAMP traffic out, I think that even if the destination port is one > > from the Dynamic range, for a relatively long test session it can be > > filtered out. > > So if that is the only? concern then write it out. I would expect that > the higher layer management protocol that creates a measurement session > to actually ensure that the STAMP endpoint actually have the port > numbers they attempt to use. Isn't that a reasonable requirement to put > on the solution? > GIM2>> Agree with your suggestion. Will put in the new section. If STAMP is managed by a centralized system, whether it is proprietary OSS/BSS or an orchestrator that uses YANG data models, the system will be able to coordinate selection of port numbers on the Session-Sender and Session-Reflector. But some systems may use EMS or CLI and that is where human coordination may be required. > > My thinking with the filtering out concern was that in cases where one > runs STAMP measurement sessions, if the measurement interfer with > critical traffic an action for an on-path node that can actually > identify the STAMP traffic was to filer it out. And that may be > considered trivial when the well known port is used, but if a user or > dynamic port is used, then that requries a managment system to provide > the on-path node with the necessary information, i.e. 3/5 tuple for the > STAMP flows. > GIM2>> I think that a transit node can identify a flow as the STAMP flow only if the destination port is the STAMP default UDP destination port number, 862. In case a STAMP session has the destination port number as one of port numbers from the User range, IP/UDP encapsulation of STAMP packets would be indistinguishable from packets originated by the application that is assigned that port number. Thus, filtering out on only destination port number may negatively affect service, legitimate service. Because of that, I think that filtering will have to use more information. On the other hand, if the test flow does not exceed agreed rate, then any filtering test packets out, in my opinion, is counter-productive, as it hides some issues in the networks rather than letting the OAM tools to expose them, localize, and characterize. > > > > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? Is > > > that a > > > measurment session between one specific and sender and a > > > specific > > > reflector for a time duration? The defenition of the > > > session do matter > > > if one intended to enable a single sender to use multiple > > > reflectors, > > > and if that can be a single session or always multiple > > > indepdendent > > > ones. Would appreciate a definition what a session is. If > > > it is > > > possible to send STAMP traffic using a multicast or > > > broadcast address > > > should be made explicit. > > > > GIM>> Your interpretation is correct, STAMP session is implicitly > > defined as p2p. And that is what reflected in the STAMP YANG model. > > Would the following text make it clearer: > > NEW TEXT: > > In this document, a measurement session also referred to as > > STAMP session, is the session between one specific Session-Sender > > and > > one particular Session-Reflector for a time duration. > > Yes, please include that definition. Question would it be clearer to > replace ".. is the session betweeen .." with ".. is the bi-directional > packet flows between .."? > GIM2>> I agree, defining a session as a session makes is somewhat repetitive. Thank you. Below is the updated text: In this document, a measurement session also referred to as STAMP session, is the bi-directional packet flow between one specific Session-Sender and one particular Session-Reflector for a time duration. > > > > > 3. Section 4.1.1.: > > > Timestamp is eight octets long field. STAMP node MUST > > > support > > > Network Time Protocol (NTP) version 4 64-bit timestamp format > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > support > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > timestamp > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > > Is the clock source here something that may be relevant or > > > simply > > > information the management functions should capture. I > > > think there is a > > > similar issue to that of RTP faced when it comes to > > > understand what the > > > timestamp actually represent and thus be used correctly. > > > RTP clock > > > source specification is RFC 7273 > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > GIM>> NTP and PTP encodings have a different interpretation of the > > Fraction field of the Timestamp field. In my experience, PTP format > > is native for the data plane, while NTP is more used at the control > > plane. Original extension to TWAMP has been described in RFC 8186. > > I think you missunderstood. When I talk about clock source, I am > actually referring to identifying the particular clock that the node > use to derive the included timestamp from. > > And likely this is a moot point in this document where the clock source > information belongs in the management layer, e.g. in the YANG data > model. > GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-tlv ) provides information about the clock synchronization protocol and the method by wich the timestamp has been acquired at a Session-Reflector. We may extend it to list the name/locatior of the master clock. > > > > > 4. Section 4.1: > > > Because STAMP supports symmetrical test packets, STAMP > > > Session-Sender > > > packet has a minimum size of 44 octets in unauthenticated mode, > > > see > > > Figure 2, and 112 octets in the authenticated mode, see Figure > > > 4. > > > > > > The above text implies some potential for UDP payload size > > > variability > > > for the STAMP packets. However, the actual definition > > > appear to have > > > fixed sizes. Can you please clarify if I have missed > > > something that > > > enables the STAMP packet to have variable size? > > > > GIM>> I think that the text can be improved by characterizing the > > listed sizes as "base". The variable length of a test packet in STAMP > > is supported by using Extra Padding TLV defined in draft-ietf-ippm- > > stamp-option-tlv. Below is the proposed update: > > OLD TEXT: > > Because STAMP supports symmetrical test packets, STAMP Session- > > Sender > > packet has a minimum size of 44 octets in unauthenticated mode, > > see > > Figure 2, and 112 octets in the authenticated mode, see Figure 4. > > NEW TEXT: > > STAMP supports symmetrical test packets. The base STAMP Session- > > Sender packet has a minimum size of 44 octets in unauthenticated > > mode, see Figure 2, and 112 octets in the authenticated mode, see > > Figure 4. The variable length of a test packet in STAMP is > > supported > > by using Extra Padding TLV defined in > > [I-D.ietf-ippm-stamp-option-tlv]. > > > > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > > moved to the Normative References list or may remain in the > > Informative list? > > From my perspective, the fact that optional TLV may occur following the > base headers appears quite important. Here comes a question of > intention form the WG. Is it intended that one can have STAMP endpoints > that do not even support receiving packets larger than the base? > > In other words there will be two main versions already now, one that > supports some TLV and can at least handle the TLV skip forward and > ignore the content and one that will throw a fit over the TLVs? If that > is not the intention I think the fact that TLV's may occur should be > moved into this specification and have it as a normative reference. > GIM2>> Will move the reference to the Normative section. With TLV being normative, I'd expect that the intelligent implementation of this draft, of the base STAMP specification, will accept any valid STAMP packet though not process extensions. But the base STAMP Session-Reflector will return the base reflected packet. > > I guess the answer is that you have backwards comaptibility reasons for > not allowing TLVs at all in some sessions, or? > GIM2>> Yes, that and the principle "keep it simple". > > > Cheers > > Magnus Westerlund > > > ---------------------------------------------------------------------- > Network Architecture & Protocols, Ericsson Research > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Torshamnsgatan 23 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > > --000000000000e2ebac05924b42f0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Magnus,
thank you for clarificatio= ns and further detailing your comments, questions. Please find my answers a= nd notes below in-lined under the GIM2>> tag.

Regards,
Greg

On Wed, Sep 11, 2019 at 12:53 AM Magnus West= erlund <magnus.westerl= und@ericsson.com> wrote:
Hi Greg,

Thanks for the reply. See inline for my comments and response.


On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote:
> Hi Magnus,
> thank you for the review and thoughtful, pointed questions. Please
> find my answers in-line under GIM>> tag.
>
> Regards,
> Greg
>
> On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker <<= br> > noreply@ietf.org= > wrote:
> > Magnus Westerlund has entered the following ballot position for > > draft-ietf-ippm-stamp-07: Discuss
> >
> > When responding, please keep the subject line intact and reply to=
> > all
> > email addresses included in the To and CC lines. (Feel free to cu= t
> > this
> > introductory paragraph, however.)
> >
> >
> > Please refer to
> > https://www.ietf.org/iesg/stateme= nt/discuss-criteria.html
> > for more information about IESG DISCUSS and COMMENT positions. > >
> >
> > The document, along with other ballot positions, can be found her= e:
> > https://datatracker.ietf.org/doc/dr= aft-ietf-ippm-stamp/
> >
> >
> >
> > -----------------------------------------------------------------=
> > -----
> > DISCUSS:
> > -----------------------------------------------------------------=
> > -----
> >
> > Two very much discussing discusses. However, I would really like = to
> > hear the
> > answer to these concerns before clearing.
> >
> > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? If=
> > there ever
> > would exist a need to deploy another integrity solution, even if<= br> > > the actual
> > algorithm used to construct the tag can be agreed by the
> > management, there
> > appear to exist a hard look in to use 16-byte tags. Have this iss= ue
> > been
> > considered?
>
> GIM>> Indeed, this specification defines the use of only one
> algorithm and only 16 bytes-long HMAC field. Your question prompted > the discussion among authors and we believe that in a future
> specification it would be feasible to extend supporting a number of > algorithms and different lengths of HMAC field both being defined
> through extension to STAMP YANG data model.

So if I understand this (taking a discussion with Mirja about keeping
things as simple as possible) the solution is to basically is when need
arises define a new STAMP version, and then use YANG to coordinate
which version is used for the measurement. If that is a correct re-
interpretation of your response then I am fine with it.
GIM2>> The direction from the WG was to keep the base specificatio= n as simple=C2=A0 as possible (and that was the reason to split TLV extensi= ons into a separate document).=C2=A0

> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 6:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The possible impact of the
> >=C2=A0 =C2=A0 STAMP test packets on the network MUST be thoroughly= analyzed,
> > and
> >=C2=A0 =C2=A0 the use of STAMP for each case MUST be agreed by all= users on
> > the
> >=C2=A0 =C2=A0 network before starting the STAMP test session.
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I assume some potential issues a= re know, shouldn't they
> > really be
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0listed here in the security cons= ideration to further
> > motivate why the
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0analysis needs to happen.
>
> GIM>> This is in reference to using numbers from the User range = as
> the destination port number. Would adding the reference to the case > of using the port numbers from the User range address your concern? > Or rather refer to Section 4, as it includes more discussion (see
> below)?

Okay, I don't really care where the discussion happens. But I don't=
find any real discussion and listing of the concerns with using user or
dynamic ports for STAMP Sessions? With the formulation you use, I would
expect at least some list of potential concerns that needs to be
evaluated in the context of the particular usage of STAMP.
GIM2>> Per Berry's suggestion, I'm adding a new section= , Operational Considerations, to list possible scenarios and possible issue= s with using destination ports from the User range and from the Dynamic ran= ge. I hope to finish it in a couple days. Will share on this discussion thr= ead promptly.=C2=A0

> >
> > -----------------------------------------------------------------=
> > -----
> > COMMENT:
> > -----------------------------------------------------------------=
> > -----
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01. Section 4:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Before using numbers from the Us= er Ports range, the
> > possible impact
> >=C2=A0 =C2=A0 on the network MUST be carefully studied and agreed = by all users
> > of
> >=C2=A0 =C2=A0 the network.
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the above sentence missing to= list an important
> > assumption? Is the
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0assumption that by using the reg= istred destination port an
> > operator
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that sees to much STAMP traffic = can simply filter it out
> > and that way
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0deal with the traffic, something= which is not possible when
> > using an
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0locally decided port? If that is= the case, this assumption
> > should
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably be noted.
>
> GIM>> That is a very good point but our primary motivation for t= his
> cautionary note (or strong warning) was that by allowing STAMP to use<= br> > port numbers from the User range, ports that may be already assigned > to protocols, creates a DDOS attack vector. As for the filtering
> STAMP traffic out, I think that even if the destination port is one > from the Dynamic range, for a relatively long test session it can be > filtered out.

So if that is the only? concern then write it out. I would expect that
the higher layer management protocol that creates a measurement session
to actually ensure that the STAMP endpoint actually have the port
numbers they attempt to use. Isn't that a reasonable requirement to put=
on the solution?
GIM2>> Agree with your suggest= ion. Will put in the new section. If STAMP is managed by a centralized syst= em, whether it is proprietary OSS/BSS or an orchestrator that uses YANG dat= a models, the system will be able to coordinate selection of port numbers o= n the Session-Sender and Session-Reflector. But some systems may use EMS or= CLI and that is where human coordination may be required.=C2=A0

My thinking with the filtering out concern was that in cases where one
runs STAMP measurement sessions, if the measurement interfer with
critical traffic an action for an on-path node that can actually
identify the STAMP traffic was to filer it out. And that may be
considered trivial when the well known port is used, but if a user or
dynamic port is used, then that requries a managment system to provide
the on-path node with the necessary information, i.e. 3/5 tuple for the
STAMP flows.
GIM2>> I think that a transit node= can identify a flow as the STAMP flow only if the destination port is the = STAMP default UDP destination port number, 862. In case a STAMP session has= the destination port number as one of port numbers from the User range, IP= /UDP encapsulation of STAMP packets would be indistinguishable from packets= originated by the application that is assigned that port number. Thus, fil= tering out on only destination port number may negatively affect service, l= egitimate service. Because of that, I think that filtering will have to use= more information. On the other hand, if the test flow does not exceed agre= ed rate, then any filtering test packets out, in my opinion, is counter-pro= ductive, as it hides some issues in the networks rather than letting the OA= M tools to expose them, localize, and characterize.


> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 3 and 4, and 4.1.1: W= hat is a STAMP Session? Is
> > that a
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0measurment session between one s= pecific and sender and a
> > specific
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reflector for a time duration?= =C2=A0 The defenition of the
> > session do matter
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0if one intended to enable a sing= le sender to use multiple
> > reflectors,
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and if that can be a single sess= ion or always multiple
> > indepdendent
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ones. Would appreciate a definit= ion what a session is. If
> > it is
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0possible to send STAMP traffic u= sing a multicast or
> > broadcast address
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0should be made explicit.
>
> GIM>> Your interpretation is correct, STAMP session is implicitl= y
> defined as p2p. And that is what reflected in the STAMP YANG model. > Would the following text make it clearer:
> NEW TEXT:
>=C2=A0 =C2=A0 In this document, a measurement session also referred to = as
>=C2=A0 =C2=A0 STAMP session, is the session between one specific Sessio= n-Sender
> and
>=C2=A0 =C2=A0 one particular Session-Reflector for a time duration.

Yes, please include that definition. Question would it be clearer to
replace ".. is the session betweeen .." with ".. is the bi-d= irectional
packet flows between .."?
GIM2>> I agree, = defining a session as a session makes is somewhat repetitive. Thank you.=C2= =A0
Below is the updated text:
=C2=A0 =C2=A0In this doc= ument, a measurement session also referred to as
=C2=A0 =C2=A0STAMP sess= ion, is the bi-directional packet flow between one specific
=C2=A0 =C2= =A0Session-Sender and one particular Session-Reflector for a time
=C2=A0= =C2=A0duration.


> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.=C2=A0 Section 4.1.1.:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Timestamp is eight octets long f= ield.=C2=A0 STAMP node MUST
> > support
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0Network Time Protocol (NTP) version 4 6= 4-bit timestamp format
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC5905], the format used in [RFC5357]= .=C2=A0 STAMP node MAY
> > support
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0IEEE 1588v2 Precision Time Protocol tru= ncated 64-bit
> > timestamp
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0format [IEEE.1588.2008], the format use= d in [RFC8186].
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the clock source here somethi= ng that may be relevant or
> > simply
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0information the management funct= ions should capture. I
> > think there is a
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0similar issue to that of RTP fac= ed when it comes to
> > understand what the
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0timestamp actually represent and= thus be used correctly.
> > RTP clock
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0source specification is RFC 7273=
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(https://datatra= cker.ietf.org/doc/rfc7273/)
>
> GIM>> NTP and PTP encodings have a different interpretation of t= he
> Fraction field of the Timestamp field. In my experience, PTP format > is native for the data plane, while NTP is more used at the control > plane. Original extension to TWAMP has been described in RFC 8186.

I think you missunderstood. When I talk about clock source, I am
actually referring to identifying the particular clock that the node
use to derive the included timestamp from.

And likely this is a moot point in this document where the clock source
information belongs in the management layer, e.g. in the YANG data
model.
GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-tlv) provides information a= bout the clock synchronization protocol and the method by wich the timestam= p has been acquired at a Session-Reflector. We may extend it to list the na= me/locatior of the master clock.


> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04. Section 4.1:
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Because STAMP supports s= ymmetrical test packets, STAMP
> > Session-Sender
> >=C2=A0 =C2=A0 packet has a minimum size of 44 octets in unauthenti= cated mode,
> > see
> >=C2=A0 =C2=A0 Figure 2, and 112 octets in the authenticated mode, = see Figure
> > 4.
> >
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The above text implies some pote= ntial for UDP payload size
> > variability
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0for the STAMP packets. However, = the actual definition
> > appear to have
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0fixed sizes. Can you please clar= ify if I have missed
> > something that
> >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0enables the STAMP packet to have= variable size?
>
> GIM>> I think that the text can be improved by characterizing th= e
> listed sizes as "base". The variable length of a test packet= in STAMP
> is supported by using Extra Padding TLV defined in draft-ietf-ippm- > stamp-option-tlv. Below is the proposed update:
> OLD TEXT:
>=C2=A0 =C2=A0 Because STAMP supports symmetrical test packets, STAMP Se= ssion-
> Sender
>=C2=A0 =C2=A0 packet has a minimum size of 44 octets in unauthenticated= mode,
> see
>=C2=A0 =C2=A0 Figure 2, and 112 octets in the authenticated mode, see F= igure 4.
> NEW TEXT:
>=C2=A0 =C2=A0 STAMP supports symmetrical test packets.=C2=A0 The base S= TAMP Session-
>=C2=A0 =C2=A0 Sender packet has a minimum size of 44 octets in unauthen= ticated
>=C2=A0 =C2=A0 mode, see Figure 2, and 112 octets in the authenticated m= ode, see
>=C2=A0 =C2=A0 Figure 4.=C2=A0 The variable length of a test packet in S= TAMP is
> supported
>=C2=A0 =C2=A0 by using Extra Padding TLV defined in
>=C2=A0 =C2=A0 [I-D.ietf-ippm-stamp-option-tlv].
>
> With the new reference, should I-D.ietf-ippm-stamp-option-tlv be
> moved to the Normative References list or may remain in the
> Informative list?

>From my perspective, the fact that optional TLV may occur following the
base headers appears quite important. Here comes a question of
intention form the WG. Is it intended that one can have STAMP endpoints
that do not even support receiving packets larger than the base?

In other words there will be two main versions already now, one that
supports some TLV and can at least handle the TLV skip forward and
ignore the content and one that will throw a fit over the TLVs? If that
is not the intention I think the fact that TLV's may occur should be moved into this specification and have it as a normative reference.
GIM2>> Will move the reference to the Normative section. With TLV bei= ng normative, I'd expect that the intelligent implementation of this dr= aft, of the base STAMP specification, will accept any valid STAMP packet th= ough not process extensions. But the base STAMP Session-Reflector will retu= rn the base reflected packet. =C2=A0

I guess the answer is that you have backwards comaptibility reasons for
not allowing TLVs at all in some sessions, or?
GIM2&g= t;> Yes, that and the principle "keep it simple".=C2=A0
<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft:1px solid rgb(204,204,204);padding-left:1ex">

Cheers

Magnus Westerlund


----------------------------------------------------------------------
Network Architecture & Protocols, Ericsson Research
----------------------------------------------------------------------
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Torshamnsgatan 23=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| Mobile +46 73 0= 949079
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Wed, 11 Sep 2019 18:36:33 +0000 From: "Nagendra Kumar Nainar (naikumar)" To: Tommy Pauly , IETF IPPM WG CC: "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" Thread-Topic: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaLuW0nj0iJFDfkCAXmReYyM0/acmiycA Date: Wed, 11 Sep 2019 18:36:33 +0000 Message-ID: <35729C61-E0EF-453F-9350-ABEB4D5D9A8C@cisco.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/10.10.d.190811 authentication-results: spf=none (sender IP is ) smtp.mailfrom=naikumar@cisco.com; x-originating-ip: [2001:420:2240:1268:a466:4e72:1090:13a] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 409ffc74-110f-4a9e-832f-08d736e6f85f x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); 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charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 409ffc74-110f-4a9e-832f-08d736e6f85f X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Sep 2019 18:36:33.2022 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 2gCg5VObu4oy2sAVcHJKL+kx+lD2KQ8gOtj0d1dcx6wYalOQInFigZOtxTVNwKnazFmFkfCeaU9WPZE5jt1QYQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR11MB1682 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.36.7.16, xch-aln-006.cisco.com X-Outbound-Node: rcdn-core-10.cisco.com Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 18:36:39 -0000 U3VwcG9ydC4NCg0KUmVnYXJkcywNCk5hZ2VuZHJhDQoNCu+7v09uIDkvMTEvMTksIDEyOjExIFBN LCAiaXBwbSBvbiBiZWhhbGYgb2YgVG9tbXkgUGF1bHkiIDxpcHBtLWJvdW5jZXNAaWV0Zi5vcmcg b24gYmVoYWxmIG9mIHRwYXVseT00MGFwcGxlLmNvbUBkbWFyYy5pZXRmLm9yZz4gd3JvdGU6DQoN CiAgICBIZWxsbyBJUFBNLA0KICAgIA0KICAgIFRoaXMgZW1haWwgc3RhcnRzIGEgd29ya2luZyBn cm91cCBhZG9wdGlvbiBjYWxsIGZvciBkcmFmdC1pb2FtZXRhbC1pcHBtLTZtYW4taW9hbS1pcHY2 LW9wdGlvbnMuIFRoaXMgZG9jdW1lbnQgZGVmaW5lcyB0aGUgSVB2NiBvcHRpb24gZW5jYXBzdWxh dGlvbiBmb3IgSU9BTSBkYXRhLiBUaGlzIGRvY3VtZW50IHdhcyBkaXNjdXNzZWQgd2l0aCB0aGUg Nm1hbiBXRywgd2hpY2ggYWR2aXNlZCB0aGF0IHRoZSB3b3JrIGJlIGRvbmUgaW4gaXBwbSwgd2l0 aCByZXZpZXcgYnkgNm1hbi4NCiAgICANCiAgICBUaGUgZG9jdW1lbnRzIGFyZSBhdmFpbGFibGUg aGVyZToNCiAgICANCiAgICBodHRwczovL2RhdGF0cmFja2VyLmlldGYub3JnL2RvYy9kcmFmdC1p b2FtZXRhbC1pcHBtLTZtYW4taW9hbS1pcHY2LW9wdGlvbnMvDQogICAgaHR0cHM6Ly90b29scy5p ZXRmLm9yZy9odG1sL2RyYWZ0LWlvYW1ldGFsLWlwcG0tNm1hbi1pb2FtLWlwdjYtb3B0aW9ucy0w Mg0KICAgIA0KICAgIFBsZWFzZSByZXBseSB0byB0aGlzIGVtYWlsIGJ5IFdlZG5lc2RheSwgU2Vw dGVtYmVyIDI1LCB3aXRoIHlvdXIgaW5wdXQgb24gd2hldGhlciBvciBub3QgdGhlIFdHIHNob3Vs ZCBhZG9wdCB0aGlzIGRvY3VtZW50Lg0KICAgIA0KICAgIEJlc3QsDQogICAgVG9tbXkgKGFzIElQ UE0gY28tY2hhaXIpDQogICAgX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18NCiAgICBpcHBtIG1haWxpbmcgbGlzdA0KICAgIGlwcG1AaWV0Zi5vcmcNCiAgICBo dHRwczovL3d3dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2lwcG0NCiAgICANCg0K From nobody Wed Sep 11 12:50:34 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 982061200B1; Wed, 11 Sep 2019 12:50:22 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.101.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156823142256.13381.2521897717396682167@ietfa.amsl.com> Date: Wed, 11 Sep 2019 12:50:22 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-metric-registry-20.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 19:50:23 -0000 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 : Registry for Performance Metrics Authors : Marcelo Bagnulo Benoit Claise Philip Eardley Al Morton Aamer Akhter Filename : draft-ietf-ippm-metric-registry-20.txt Pages : 34 Date : 2019-09-11 Abstract: This document defines the format for the IANA Performance Metrics Registry. This document also gives a set of guidelines for Registered Performance Metric requesters and reviewers. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-metric-registry/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-metric-registry-20 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-metric-registry-20 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-metric-registry-20 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Wed Sep 11 12:53:18 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id C5D4F12021D; Wed, 11 Sep 2019 12:53:08 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.101.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156823158871.13503.6722164718393174915@ietfa.amsl.com> Date: Wed, 11 Sep 2019 12:53:08 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-initial-registry-12.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 19:53:09 -0000 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 : Initial Performance Metrics Registry Entries Authors : Al Morton Marcelo Bagnulo Philip Eardley Kevin D'Souza Filename : draft-ietf-ippm-initial-registry-12.txt Pages : 77 Date : 2019-09-11 Abstract: This memo defines the set of Initial Entries for the IANA Performance Metrics Registry. The set includes, UDP Round-trip Latency and Loss, Packet Delay Variation, DNS Response Latency and Loss, UDP Poisson One-way Delay and Loss, UDP Periodic One-way Delay and Loss, ICMP Round-trip Latency and Loss, and TCP round-trip Latency and Loss. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-initial-registry/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-initial-registry-12 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-initial-registry-12 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-initial-registry-12 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Wed Sep 11 12:57:49 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 256CB12006E; Wed, 11 Sep 2019 12:57:40 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.101.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156823186007.13214.739943479195091078@ietfa.amsl.com> Date: Wed, 11 Sep 2019 12:57:40 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-route-05.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 19:57:40 -0000 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 : Advanced Unidirectional Route Assessment (AURA) Authors : José Ignacio Alvarez-Hamelin Al Morton Joachim Fabini Carlos Pignataro Ruediger Geib Filename : draft-ietf-ippm-route-05.txt Pages : 27 Date : 2019-09-11 Abstract: This memo introduces an advanced unidirectional route assessment (AURA) metric and associated measurement methodology, based on the IP Performance Metrics (IPPM) Framework RFC 2330. This memo updates RFC 2330 in the areas of path-related terminology and path description, primarily to include the possibility of parallel subpaths between a given Source and Destination pair, owing to the presence of multi- path technologies. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-route/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-route-05 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-route-05 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-route-05 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Wed Sep 11 13:35:17 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 71288120227; Wed, 11 Sep 2019 13:35:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-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 J0hHMhFzCXiJ; Wed, 11 Sep 2019 13:35:12 -0700 (PDT) Received: from mx0a-00191d01.pphosted.com (mx0b-00191d01.pphosted.com [67.231.157.136]) (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 3B11A1207FF; Wed, 11 Sep 2019 13:35:12 -0700 (PDT) Received: from pps.filterd (m0049459.ppops.net [127.0.0.1]) by m0049459.ppops.net-00191d01. 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Re: [ippm] I-D Action: draft-ietf-ippm-route-05.txt X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 20:57:18 -0000 SGkgSVBQTSwNCg0KSGVyZSdzIGFuIHVwZGF0ZSBvZiB0aGUgQVVSQSBkcmFmdCB0aGF0IGFkZHJl c3NlcyBtb3N0IG9mIA0KRnJhbmsncyBjb21tZW50cyBpbiBhIHdheSB0aGF0IHdlIGFncmVlZCBh dCB0aGUgbWVldGluZy4NCihkZWZpbmUgYW5kIHVzZSBOb2RlIGluc3RlYWQgb2YgSG9zdCwgbGVh dmUgMjMzMCBIb3N0IGRlZiBhbG9uZSkuDQpXZSBhZ3JlZWQgb24gZGlyZWN0aW9uIGZvciBTZWMg My42IG9uIHJlcG9ydGluZyByZXF1aXJlbWVudHMsDQpidXQgbm90IHRoZSB0ZXh0LCBtb3JlIHRv IGRvIGhlcmUuIEFsc28sIHdlIGhhdmUgRm9vdGVyJ3MgY29tbWVudHMNCnRvIHJlcGx5IGFuZCBy ZXNvbHZlLCBwbHVzIHNvbWUgcXVlc3Rpb25zIGVhc2lseSBsb2NhdGVkIHcvICJAQEBAIi4NCg0K VGhpcyB2ZXJzaW9uIGlzIHN1aXRhYmxlIGZvciBmdXJ0aGVyIHJldmlldy4NCg0KQWwNCmZvciB0 aGUgY28tYXV0aG9ycw0KDQo+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+IEZyb206IEkt 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X-Received: by 2002:a1c:1d8d:: with SMTP id d135mr6015786wmd.7.1568242657588; Wed, 11 Sep 2019 15:57:37 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Mickey Spiegel Date: Wed, 11 Sep 2019 15:57:27 -0700 Message-ID: To: Tommy Pauly Cc: IETF IPPM WG , draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org Content-Type: multipart/alternative; boundary="00000000000087160905924ef21f" Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 11 Sep 2019 22:57:41 -0000 --00000000000087160905924ef21f Content-Type: text/plain; charset="UTF-8" Support (as co-author). Mickey On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly wrote: > Hello IPPM, > > This email starts a working group adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the IPv6 > option encapsulation for IOAM data. This document was discussed with the > 6man WG, which advised that the work be done in ippm, with review by 6man. > > The documents are available here: > > > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 > > Please reply to this email by Wednesday, September 25, with your input on > whether or not the WG should adopt this document. > > Best, > Tommy (as IPPM co-chair) --00000000000087160905924ef21f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Support (as co-author).

Mickey

On = Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly <tpauly@apple.com> wrote:
Hello IPPM,

This email starts a working group adoption call for draft-ioametal-ippm-6ma= n-ioam-ipv6-options. This document defines the IPv6 option encapsulation fo= r IOAM data. This document was discussed with the 6man WG, which advised th= at the work be done in ippm, with review by 6man.

The documents are available here:

https://datatracker.ietf= .org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/
https://tools.ietf.org/html= /draft-ioametal-ippm-6man-ioam-ipv6-options-02

Please reply to this email by Wednesday, September 25, with your input on w= hether or not the WG should adopt this document.

Best,
Tommy (as IPPM co-chair)
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Thu, 12 Sep 2019 00:03:53 +0000 From: "Carlos Pignataro (cpignata)" To: Tommy Pauly CC: IETF IPPM WG , "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" Thread-Topic: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaLuOuWGCWjts1kq1ioh2wXZPDacnKacA Date: Thu, 12 Sep 2019 00:03:53 +0000 Message-ID: <77EE9F5C-B2EE-493C-B830-6C97735B0474@cisco.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3445.104.11) authentication-results: spf=none (sender IP is ) smtp.mailfrom=cpignata@cisco.com; x-originating-ip: [173.38.117.65] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 13e3741d-7a16-478c-bb6d-08d73714b2c2 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:BL0PR11MB3361; x-ms-traffictypediagnostic: BL0PR11MB3361: x-ms-exchange-purlcount: 2 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; 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charset="us-ascii" Content-ID: <2C6DEB9B4053804CB2982DB5D4D14D18@namprd11.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 13e3741d-7a16-478c-bb6d-08d73714b2c2 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Sep 2019 00:03:53.3025 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: WE+/C4py86WDjjP+v/KaCTtHBtsg+/cq9t7qj/lHLP5Ta5uJaNEKdeAvyTYEjIEobzC2MNAVjrchxCmDBRGrrQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR11MB3361 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.37.102.23, xch-rcd-013.cisco.com X-Outbound-Node: rcdn-core-8.cisco.com Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Thu, 12 Sep 2019 00:04:00 -0000 This is an important encapsulation for IOAM data fields in IPv6, and as suc= h support adoption of this document. IOAM Data is adopted, and this makes i= t real for IPv6 deployments. (As co-author) Best, Carlos. > On Sep 11, 2019, at 12:10 PM, Tommy Pauly wrote: >=20 > Hello IPPM, >=20 > This email starts a working group adoption call for draft-ioametal-ippm-6= man-ioam-ipv6-options. This document defines the IPv6 option encapsulation = for IOAM data. This document was discussed with the 6man WG, which advised = that the work be done in ippm, with review by 6man. >=20 > The documents are available here: >=20 > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-optio= ns/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 >=20 > Please reply to this email by Wednesday, September 25, with your input on= whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) From nobody Wed Sep 11 17:31:09 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D44B3120026; Wed, 11 Sep 2019 17:31:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.921 X-Spam-Level: X-Spam-Status: No, score=-1.921 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.026, SPF_HELO_NONE=0.001, SPF_PASS=-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 GVamxMIWbuSI; Wed, 11 Sep 2019 17:31:05 -0700 (PDT) Received: from mail-vs1-f46.google.com (mail-vs1-f46.google.com [209.85.217.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9A8B012001A; Wed, 11 Sep 2019 17:31:05 -0700 (PDT) Received: by mail-vs1-f46.google.com with SMTP id b123so15024057vsb.5; Wed, 11 Sep 2019 17:31:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=TVKRZADbqxnlM7LvVkdU77fpkQdNdPHUSyg2A/9XOfE=; b=AHBZSeg1QMQxVG4U8IqkWsC3RNwE96VKyRDg854PT+l5JssDBMkqADemZf/qZlDp0L JCDejgfGrl4oyhxNeei9RtzYugBd/E4Z/0RWkVoTLh253qP7VibIueM7a4TYh0TvuPri sLOHgh4PXFTdMPwPYhxFw7i4XRpIyZcaMoURyY8NKogVaHzu5lF+9HstSRThLMGvT/RZ /mMBYLtVOiBmvW3/Y1GTsSBklhymx99HnRRIBoXYqkEg/xX4BjWhJPAJ8wGmOWVD00bG WGngtK1OO5ZuSnSKfuQNP3PO+cWNL+S7vNFv38BCFCUV6gbfNOBrUfNyvxQ/LSsRq0m+ hPSA== X-Gm-Message-State: APjAAAUripybfjHlImIaTRGdsYfgWXqVV4z4vvPA0xe5FlQGjeAIMio6 uHm0hrs/NH1wtmzSdkJ0HMHNmfK54Dls+yXiCps= X-Google-Smtp-Source: APXvYqxK79pEGjSizkq4se9oGH/ZXk5vJVSa1AA8bMkFqYtPcjEGT0+AtirNvaoOscZ7yIz70VXNtqnCE0ilL6YA1PU= X-Received: by 2002:a67:2b86:: with SMTP id r128mr7755250vsr.119.1568248264699; Wed, 11 Sep 2019 17:31:04 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Anoop Ghanwani Date: Wed, 11 Sep 2019 17:30:53 -0700 Message-ID: To: Tommy Pauly Cc: IETF IPPM WG , draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org Content-Type: multipart/alternative; boundary="000000000000bcb8420592504007" Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Thu, 12 Sep 2019 00:31:08 -0000 --000000000000bcb8420592504007 Content-Type: text/plain; charset="UTF-8" How would the headers look when IOAM is used in conjunction with IPv6 segment routing? Does the IOAM header and metadata precede or follow the segment routing header? Thanks, Anoop On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly wrote: > Hello IPPM, > > This email starts a working group adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the IPv6 > option encapsulation for IOAM data. This document was discussed with the > 6man WG, which advised that the work be done in ippm, with review by 6man. > > The documents are available here: > > > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 > > Please reply to this email by Wednesday, September 25, with your input on > whether or not the WG should adopt this document. > > Best, > Tommy (as IPPM co-chair) > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm > --000000000000bcb8420592504007 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

How would the headers look when IOAM is used in c= onjunction with IPv6 segment routing?=C2=A0 Does the IOAM header and metada= ta precede or follow=C2=A0the segment routing header?

<= div>Thanks,
Anoop

On Wed, Sep 11, 2019 at 9:11 AM Tommy Paul= y <tpauly=3D40apple.com@dm= arc.ietf.org> wrote:
Hello IPPM,

This email starts a working group adoption call for draft-ioametal-ippm-6ma= n-ioam-ipv6-options. This document defines the IPv6 option encapsulation fo= r IOAM data. This document was discussed with the 6man WG, which advised th= at the work be done in ippm, with review by 6man.

The documents are available here:

https://datatracker.ietf= .org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/
https://tools.ietf.org/html= /draft-ioametal-ippm-6man-ioam-ipv6-options-02

Please reply to this email by Wednesday, September 25, with your input on w= hether or not the WG should adopt this document.

Best,
Tommy (as IPPM co-chair)
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--000000000000bcb8420592504007-- From nobody Wed Sep 11 18:14:52 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F280D120C42; Wed, 11 Sep 2019 18:14:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.199 X-Spam-Level: X-Spam-Status: No, score=-4.199 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable 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 JINrt7Zy8xet; Wed, 11 Sep 2019 18:14:48 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (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 EEE4D120C33; Wed, 11 Sep 2019 18:14:47 -0700 (PDT) Received: from lhreml709-cah.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id B6C43CBF802BB9AEFADB; Thu, 12 Sep 2019 02:14:45 +0100 (IST) Received: from DGGEMM406-HUB.china.huawei.com (10.3.20.214) by lhreml709-cah.china.huawei.com (10.201.108.32) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 12 Sep 2019 02:14:44 +0100 Received: from DGGEMM532-MBX.china.huawei.com ([169.254.7.237]) by DGGEMM406-HUB.china.huawei.com ([10.3.20.214]) with mapi id 14.03.0439.000; Thu, 12 Sep 2019 09:14:40 +0800 From: Lizhenbin To: Anoop Ghanwani , Tommy Pauly CC: "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" , IETF IPPM WG , IPv6 List Thread-Topic: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaLuT8Q+TtD741k+LIbg+qusvtacmqxeAgACQn7A= Date: Thu, 12 Sep 2019 01:14:40 +0000 Message-ID: <5A5B4DE12C0DAC44AF501CD9A2B01A8D934AD23E@DGGEMM532-MBX.china.huawei.com> References: In-Reply-To: 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X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 22D52120232; Wed, 11 Sep 2019 19:15:03 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.7 X-Spam-Level: X-Spam-Status: No, score=-2.7 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=joelhalpern.com 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 gCIfymxRMHxZ; Wed, 11 Sep 2019 19:15:00 -0700 (PDT) Received: from maila2.tigertech.net (maila2.tigertech.net [208.80.4.152]) (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 A77F81200B7; Wed, 11 Sep 2019 19:15:00 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by maila2.tigertech.net (Postfix) with ESMTP id 46TMmN4BJmz1bF53; Wed, 11 Sep 2019 19:15:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelhalpern.com; s=2.tigertech; t=1568254500; bh=w/SX+Yp9ydokxSUcnBBzrMveWAjsTEvLccMiE73YGtE=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=c8yq9D7WLKswcpqomcoiRAdpcEaloueB/hFhLK99KMP6JoU/9ad4+kdAMKOBK2HZp 3BXCbeiSg6j0653eQVcR+qFt8ZhgdoLAdPgjDj2wXpWIdlTK7s+g43rIEcBMBwyK+l Kpvowbaf/e1oVo9hut4Om4TfQc0aWZH3ecgxCm4A= X-Virus-Scanned: Debian amavisd-new at maila2.tigertech.net Received: from [172.20.7.244] (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by maila2.tigertech.net (Postfix) with ESMTPSA id 46TMmL0mFfz1bF4t; Wed, 11 Sep 2019 19:14:57 -0700 (PDT) To: Lizhenbin , Anoop Ghanwani , Tommy Pauly Cc: "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" , IPv6 List , IETF IPPM WG References: <5A5B4DE12C0DAC44AF501CD9A2B01A8D934AD23E@DGGEMM532-MBX.china.huawei.com> From: "Joel M. Halpern" Message-ID: Date: Wed, 11 Sep 2019 22:14:56 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <5A5B4DE12C0DAC44AF501CD9A2B01A8D934AD23E@DGGEMM532-MBX.china.huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Thu, 12 Sep 2019 02:15:03 -0000 No, please. That draft proposes recoding the information from SFC's NSH into some other format. This removes the entire interoperability premise of teh NSH work. Yours, Joel On 9/11/2019 9:14 PM, Lizhenbin wrote: > Agree very much. We also proposed the challenges and the optimization > considering when IOAM and SRH are used together in the following draft. > > https://datatracker.ietf.org/doc/draft-li-6man-ipv6-sfc-ifit/ > > That is the reason why we do not think the solution proposed by > draft-ioametal-ippm-6man-ioam-ipv6-options is reasonable. > > In order for better understanding and discussion, 6MAN WG is copied. > > Best Regards, > > Zhenbin (Robin) > > *From:*ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Anoop Ghanwani > *Sent:* Thursday, September 12, 2019 8:31 AM > *To:* Tommy Pauly > *Cc:* draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org; IETF IPPM WG > > *Subject:* Re: [ippm] Adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options > > How would the headers look when IOAM is used in conjunction with IPv6 > segment routing?  Does the IOAM header and metadata precede or > follow the segment routing header? > > Thanks, > > Anoop > > On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly > > > wrote: > > Hello IPPM, > > This email starts a working group adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines > the IPv6 option encapsulation for IOAM data. This document was > discussed with the 6man WG, which advised that the work be done in > ippm, with review by 6man. > > The documents are available here: > > https://datatracker.ietf..org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/ > > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 > > Please reply to this email by Wednesday, September 25, with your > input on whether or not the WG should adopt this document. > > Best, > Tommy (as IPPM co-chair) > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm > > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > From nobody Wed Sep 11 20:44:12 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BFAF31200C4; 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Thu, 12 Sep 2019 03:43:22 +0000 From: "Vengada Prasad Govindan (venggovi)" To: "Frank Brockners (fbrockne)" , "tpauly@apple.com" , IETF IPPM WG CC: "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" Thread-Topic: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaL8L3NzYEseVWEiGfaIsmdEciKcnZoxw Date: Thu, 12 Sep 2019 03:43:22 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=venggovi@cisco.com; x-originating-ip: [2001:420:5244:1300:c43:3859:506e:760] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 651994e5-1eaa-41b4-ccef-08d737335c41 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:CY4PR11MB1479; x-ms-traffictypediagnostic: CY4PR11MB1479: x-ms-exchange-purlcount: 3 x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 651994e5-1eaa-41b4-ccef-08d737335c41 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Sep 2019 03:43:22.5331 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: f5t/TChp1WJZPS3LXJEMuE0SrZqv43SDXXNw+aTRChLjCWHdAll4lhhlJ+cpaPhXQqY6P2XaznMUS8Q2oaMecw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR11MB1479 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.37.102.22, xch-rcd-012.cisco.com X-Outbound-Node: rcdn-core-9.cisco.com Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Thu, 12 Sep 2019 03:44:11 -0000 Support progressing the two documents as WG drafts. Thanks Prasad > -----Original Message----- > From: tpauly@apple.com > Sent: Mittwoch, 11. September 2019 18:11 > To: IETF IPPM WG > Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org > Subject: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options >=20 > Hello IPPM, >=20 > This email starts a working group adoption call for=20 > draft-ioametal-ippm-6man- ioam-ipv6-options. This document defines the=20 > IPv6 option encapsulation for IOAM data. This document was discussed=20 > with the 6man WG, which advised that the work be done in ippm, with revie= w by 6man. >=20 > The documents are available here: >=20 > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-op > tions/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options > -02 >=20 > Please reply to this email by Wednesday, September 25, with your input=20 > on whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) _______________________________________________ ippm mailing list ippm@ietf.org https://www.ietf.org/mailman/listinfo/ippm From nobody Thu Sep 12 00:29:08 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2304212080F; Thu, 12 Sep 2019 00:29:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2 X-Spam-Level: X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); 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Thu, 12 Sep 2019 07:28:59 +0000 Received: from AM6PR05MB5048.eurprd05.prod.outlook.com ([fe80::6de2:3695:ad22:b3f9]) by AM6PR05MB5048.eurprd05.prod.outlook.com ([fe80::6de2:3695:ad22:b3f9%4]) with mapi id 15.20.2263.016; Thu, 12 Sep 2019 07:28:59 +0000 From: Aviv Kfir To: "Vengada Prasad Govindan (venggovi)" , "Frank Brockners (fbrockne)" , "tpauly@apple.com" , IETF IPPM WG CC: "draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org" Thread-Topic: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: AQHVaLuFYZx5i9xVlE2Y177s6bVdHKcmrHIAgAC6iQCAAD7zQA== Date: Thu, 12 Sep 2019 07:28:59 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=avivk@mellanox.com; x-originating-ip: [193.47.165.251] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 7928cca5-56a5-4f07-3991-08d73752e0e2 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; 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tpauly@apple.com; IETF= IPPM WG Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org Subject: RE: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Support progressing the two documents as WG drafts. Thanks Prasad > -----Original Message----- > From: tpauly@apple.com > Sent: Mittwoch, 11. September 2019 18:11 > To: IETF IPPM WG > Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org > Subject: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options >=20 > Hello IPPM, >=20 > This email starts a working group adoption call for > draft-ioametal-ippm-6man- ioam-ipv6-options. This document defines the > IPv6 option encapsulation for IOAM data. This document was discussed=20 > with the 6man WG, which advised that the work be done in ippm, with revie= w by 6man. >=20 > The documents are available here: >=20 > https://eur03.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata > tracker.ietf.org%2Fdoc%2Fdraft-ioametal-ippm-6man-ioam-ipv6-op&dat > a=3D02%7C01%7Cavivk%40mellanox.com%7C4c481365d2a0470adc9708d737337a4a%7C > a652971c7d2e4d9ba6a4d149256f461b%7C0%7C1%7C637038566545244045&sdat > a=3D2xeqiwJvbf0e%2BSx4Bo8wVjYJkkJZijWvTr7Y03Zojls%3D&reserved=3D0 > tions/ > https://eur03.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftool > s.ietf.org%2Fhtml%2Fdraft-ioametal-ippm-6man-ioam-ipv6-options&dat > a=3D02%7C01%7Cavivk%40mellanox.com%7C4c481365d2a0470adc9708d737337a4a%7C > a652971c7d2e4d9ba6a4d149256f461b%7C0%7C1%7C637038566545244045&sdat > a=3DIBkxiv%2Fs7wLjnH1lOpkzIjUxM2lu4fuLMi2EV7k37S0%3D&reserved=3D0 > -02 >=20 > Please reply to this email by Wednesday, September 25, with your input=20 > on whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) _______________________________________________ ippm mailing list ippm@ietf.org https://eur03.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.iet= f.org%2Fmailman%2Flistinfo%2Fippm&data=3D02%7C01%7Cavivk%40mellanox.com= %7C4c481365d2a0470adc9708d737337a4a%7Ca652971c7d2e4d9ba6a4d149256f461b%7C0%= 7C1%7C637038566545244045&sdata=3De4sCKuukQWmGe0SoVDOOBYNNT2iZosaO85exNM= UdSH8%3D&reserved=3D0 From nobody Thu Sep 12 05:23:56 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B755112016E; Thu, 12 Sep 2019 05:23:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.299 X-Spam-Level: X-Spam-Status: No, score=-4.299 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=uliege.be 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 Rj1VlK7Rdbue; Thu, 12 Sep 2019 05:23:51 -0700 (PDT) Received: from serv108.segi.ulg.ac.be (serv108.segi.ulg.ac.be [139.165.32.111]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6B0F4120052; Thu, 12 Sep 2019 05:23:50 -0700 (PDT) Received: from mbx12-zne.ulg.ac.be (serv470.segi.ulg.ac.be [139.165.32.199]) by serv108.segi.ulg.ac.be (Postfix) with ESMTP id 049CA200CCF7; Thu, 12 Sep 2019 14:23:48 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 serv108.segi.ulg.ac.be 049CA200CCF7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uliege.be; s=ulg20190529; t=1568291028; bh=QyDf+QGQjsof3wdB01c5+1TVU33xZe+Hv6OpW1hdJE4=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:From; b=EFnkwAvqjTkRVFlCUJDYfM4xOC2Z4qOxO/ANZVzIYBJAuQ8uNLcJsUYjkZfqstR0w d4UavsLbwClYq6opRlZWDO3Z2H7derulDojfvDVQD+g2V7LZIguN5OmQdmgud/mL4g bDaq+EXCrDbod2EoLh7ecs3ZKebUJYT0M6pxwztKuTKE+B2OVBeMgtXkDN5mgAkKhk rkLtFXtfhy8cMhyGikvHxl5u9q+nf962UZ13P5NMYAHhjJ1oPYQmxHton1qdlLglIk koRBOJ4D6BOcc9pQ7LsZMbfNHbX9lHfecwJCvpw0XD9y+4/dAVEFIY2fCJ0M8uUyg9 fUTcGDzzx4PSA== Received: from localhost (localhost.localdomain [127.0.0.1]) by mbx12-zne.ulg.ac.be (Postfix) with ESMTP id D9C19129EF8D; Thu, 12 Sep 2019 14:23:47 +0200 (CEST) Received: from mbx12-zne.ulg.ac.be ([127.0.0.1]) by localhost (mbx12-zne.ulg.ac.be [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id wfTRBohE3lLo; Thu, 12 Sep 2019 14:23:47 +0200 (CEST) Received: from mbx12-zne.ulg.ac.be (mbx12-zne.ulg.ac.be [139.165.32.199]) by mbx12-zne.ulg.ac.be (Postfix) with ESMTP id A3926129F1AD; Thu, 12 Sep 2019 14:23:47 +0200 (CEST) Date: Thu, 12 Sep 2019 14:23:47 +0200 (CEST) From: Justin Iurman Reply-To: Justin Iurman To: Tommy Pauly Cc: IETF IPPM WG , draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org Message-ID: <1089382943.14584818.1568291027531.JavaMail.zimbra@uliege.be> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [91.182.112.176] X-Mailer: Zimbra 8.8.11_GA_3780 (ZimbraWebClient - FF69 (Linux)/8.8.11_GA_3787) Thread-Topic: Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options Thread-Index: hwoc7xcqJVUAh+PdAULcII09z8FmgA== Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Thu, 12 Sep 2019 12:23:55 -0000 Support. Justin ----- Mail original ----- > De: "Tommy Pauly" > =C3=80: "IETF IPPM WG" > Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org > Envoy=C3=A9: Mercredi 11 Septembre 2019 18:10:41 > Objet: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-option= s > Hello IPPM, >=20 > This email starts a working group adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the IPv= 6 > option encapsulation for IOAM data. This document was discussed with the = 6man > WG, which advised that the work be done in ippm, with review by 6man. >=20 > The documents are available here: >=20 > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-optio= ns/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 >=20 > Please reply to this email by Wednesday, September 25, with your input on > whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) From nobody Sun Sep 15 23:53:01 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4ADD312080B; Sun, 15 Sep 2019 23:53:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.198 X-Spam-Level: X-Spam-Status: No, score=-4.198 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, 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DB7PR07MB5736.eurprd07.prod.outlook.com (20.177.194.155) by DB7PR07MB3931.eurprd07.prod.outlook.com (52.134.104.142) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2284.16; Mon, 16 Sep 2019 15:29:38 +0000 Received: from DB7PR07MB5736.eurprd07.prod.outlook.com ([fe80::e48c:a942:9682:2ce4]) by DB7PR07MB5736.eurprd07.prod.outlook.com ([fe80::e48c:a942:9682:2ce4%7]) with mapi id 15.20.2284.009; Mon, 16 Sep 2019 15:29:38 +0000 From: Magnus Westerlund To: "gregimirsky@gmail.com" CC: "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Thread-Topic: Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) Thread-Index: AQHVaBAbqbmUyWu4qEOdjey0JDZTiacmG9IAgACy4wCAB6hCAA== Date: Mon, 16 Sep 2019 15:29:37 +0000 Message-ID: References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> 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rNQTL+jFfHWc+EENBwQ3IaSl9mP04DNKVojpJ7/QhJnri6d23zUdpYs6IrtyAOIfxS26tpEIDbbYgpv+KFlCZU0zqZqwwnOIHRy8d0VCeXr/33mXBYUqpUxJ6PsxgRXq4HIZ2n3Q3mxadcdsTB9BfjA0QWi2oWEgrdPBSt2MBdYUkqrehwi+WpRDuiUrbHJfpiSE4VNc3wK3IsYA94fkUaednINbcu+/cu6CU250vag/GymuQg1i6qywF4FjR32d6PrOloR2MZk5TjdIoRE4w5/JjNS9/rM/CN2p7HU+sS+L1nti3bl2YbkUWs5DWpiqYRXHUYW/a/snLWouwhiXsZHGvwtCYSBMeb4I3H4h6u0k5hBmyNUNgoZoqC0DoXht05UcN0buLfK6XKUy1rhMPmN0VJdo1VOd4aj0eRZbPmg= x-ms-exchange-transport-forked: True Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-ln4CxXgh7n3O5E76ksr9" MIME-Version: 1.0 X-OriginatorOrg: ericsson.com X-MS-Exchange-CrossTenant-Network-Message-Id: e89c6b6a-16c8-4639-84f9-08d73abaaf92 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Sep 2019 15:29:37.9178 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 92e84ceb-fbfd-47ab-be52-080c6b87953f X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: qnLGslN1cWO+T1wKm9RxKMjfZc634M8PzwTqG15joZ86xcGcQQ6b9cV6nJJVl0NR7ZQq/Eehg/9/KNxXs2b6/Q368L7ytvc/oHXNT2VYXc8= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR07MB3931 Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Mon, 16 Sep 2019 15:29:46 -0000 --=-ln4CxXgh7n3O5E76ksr9 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2019-09-11 at 11:33 -0700, Greg Mirsky wrote: > Hi Magnus, > thank you for clarifications and further detailing your comments, > questions. Please find my answers and notes below in-lined under the > GIM2>> tag. >=20 > Regards, > Greg >=20 > On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund < > magnus.westerlund@ericsson.com> wrote: > > Hi Greg, > >=20 > > Thanks for the reply. See inline for my comments and response.=20 > >=20 > >=20 > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > Hi Magnus, > > > thank you for the review and thoughtful, pointed questions. > > Please > > > find my answers in-line under GIM>> tag. > > >=20 > > > Regards, > > > Greg > > >=20 > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker > > < > > > noreply@ietf.org> wrote: > > > > Magnus Westerlund has entered the following ballot position for > > > > draft-ietf-ippm-stamp-07: Discuss > > > >=20 > > > > When responding, please keep the subject line intact and reply > > to > > > > all > > > > email addresses included in the To and CC lines. (Feel free to > > cut > > > > this > > > > introductory paragraph, however.) > > > >=20 > > > >=20 > > > > Please refer to=20 > > > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > > > for more information about IESG DISCUSS and COMMENT positions. > > > >=20 > > > >=20 > > > > The document, along with other ballot positions, can be found > > here: > > > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > >=20 > > > >=20 > > > >=20 > > > > ------------------------------------------------------------- > > ---- > > > > ----- > > > > DISCUSS: > > > > ------------------------------------------------------------- > > ---- > > > > ----- > > > >=20 > > > > Two very much discussing discusses. However, I would really > > like to > > > > hear the > > > > answer to these concerns before clearing. > > > >=20 > > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? > > If > > > > there ever > > > > would exist a need to deploy another integrity solution, even > > if > > > > the actual > > > > algorithm used to construct the tag can be agreed by the > > > > management, there > > > > appear to exist a hard look in to use 16-byte tags. Have this > > issue > > > > been > > > > considered? > > >=20 > > > GIM>> Indeed, this specification defines the use of only one > > > algorithm and only 16 bytes-long HMAC field. Your question > > prompted > > > the discussion among authors and we believe that in a future > > > specification it would be feasible to extend supporting a number > > of > > > algorithms and different lengths of HMAC field both being defined > > > through extension to STAMP YANG data model. > >=20 > > So if I understand this (taking a discussion with Mirja about > > keeping > > things as simple as possible) the solution is to basically is when > > need > > arises define a new STAMP version, and then use YANG to coordinate > > which version is used for the measurement. If that is a correct re- > > interpretation of your response then I am fine with it.=20 >=20 > GIM2>> The direction from the WG was to keep the base specification > as simple as possible (and that was the reason to split TLV > extensions into a separate document).=20 Yes, understood.=20 > > > > 2. Section 6: > > > > The possible impact of the > > > > STAMP test packets on the network MUST be thoroughly > > analyzed, > > > > and > > > > the use of STAMP for each case MUST be agreed by all users > > on > > > > the > > > > network before starting the STAMP test session. > > > >=20 > > > > I assume some potential issues are know, shouldn't they > > > > really be > > > > listed here in the security consideration to further > > > > motivate why the > > > > analysis needs to happen. > > >=20 > > > GIM>> This is in reference to using numbers from the User range > > as > > > the destination port number. Would adding the reference to the > > case > > > of using the port numbers from the User range address your > > concern? > > > Or rather refer to Section 4, as it includes more discussion > > (see=20 > > > below)?=20 > >=20 > > Okay, I don't really care where the discussion happens. But I don't > > find any real discussion and listing of the concerns with using > > user or > > dynamic ports for STAMP Sessions? With the formulation you use, I > > would > > expect at least some list of potential concerns that needs to be > > evaluated in the context of the particular usage of STAMP.=20 >=20 > GIM2>> Per Berry's suggestion, I'm adding a new section, Operational > Considerations, to list possible scenarios and possible issues with > using destination ports from the User range and from the Dynamic > range. I hope to finish it in a couple days. Will share on this > discussion thread promptly.=20 Great! Looking forward to review it when written.=20 > > > >=20 > > > > ------------------------------------------------------------- > > ---- > > > > ----- > > > > COMMENT: > > > > ------------------------------------------------------------- > > ---- > > > > ----- > > > >=20 > > > > 1. Section 4: > > > > Before using numbers from the User Ports range, the > > > > possible impact > > > > on the network MUST be carefully studied and agreed by all > > users > > > > of > > > > the network. > > > >=20 > > > > Is the above sentence missing to list an important > > > > assumption? Is the > > > > assumption that by using the registred destination port > > an > > > > operator > > > > that sees to much STAMP traffic can simply filter it > > out > > > > and that way > > > > deal with the traffic, something which is not possible > > when > > > > using an > > > > locally decided port? If that is the case, this > > assumption > > > > should > > > > probably be noted. > > >=20 > > > GIM>> That is a very good point but our primary motivation for > > this > > > cautionary note (or strong warning) was that by allowing STAMP to > > use > > > port numbers from the User range, ports that may be already > > assigned > > > to protocols, creates a DDOS attack vector. As for the filtering > > > STAMP traffic out, I think that even if the destination port is > > one > > > from the Dynamic range, for a relatively long test session it can > > be > > > filtered out. > >=20 > > So if that is the only? concern then write it out. I would expect > > that > > the higher layer management protocol that creates a measurement > > session > > to actually ensure that the STAMP endpoint actually have the port > > numbers they attempt to use. Isn't that a reasonable requirement to > > put > > on the solution?=20 >=20 > GIM2>> Agree with your suggestion. Will put in the new section. If > STAMP is managed by a centralized system, whether it is proprietary > OSS/BSS or an orchestrator that uses YANG data models, the system > will be able to coordinate selection of port numbers on the Session- > Sender and Session-Reflector. But some systems may use EMS or CLI and > that is where human coordination may be required.=20 Good, then likely this is resolved when your text is ready.=20 > > My thinking with the filtering out concern was that in cases where > > one > > runs STAMP measurement sessions, if the measurement interfer with > > critical traffic an action for an on-path node that can actually > > identify the STAMP traffic was to filer it out. And that may be > > considered trivial when the well known port is used, but if a user > > or > > dynamic port is used, then that requries a managment system to > > provide > > the on-path node with the necessary information, i.e. 3/5 tuple for > > the > > STAMP flows.=20 >=20 > GIM2>> I think that a transit node can identify a flow as the STAMP > flow only if the destination port is the STAMP default UDP > destination port number, 862. In case a STAMP session has the > destination port number as one of port numbers from the User range, > IP/UDP encapsulation of STAMP packets would be indistinguishable from > packets originated by the application that is assigned that port > number. Thus, filtering out on only destination port number may > negatively affect service, legitimate service. Because of that, I > think that filtering will have to use more information. On the other > hand, if the test flow does not exceed agreed rate, then any > filtering test packets out, in my opinion, is counter-productive, as > it hides some issues in the networks rather than letting the OAM > tools to expose them, localize, and characterize. Ok. This was primarily to understand if this was in scope or not. But it sounds like this is not really in scope for how to manage it.=20 > >=20 > > > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? > > Is > > > > that a > > > > measurment session between one specific and sender and > > a > > > > specific > > > > reflector for a time duration? The defenition of the > > > > session do matter > > > > if one intended to enable a single sender to use > > multiple > > > > reflectors, > > > > and if that can be a single session or always multiple > > > > indepdendent > > > > ones. Would appreciate a definition what a session is. > > If > > > > it is > > > > possible to send STAMP traffic using a multicast or > > > > broadcast address > > > > should be made explicit. > > >=20 > > > GIM>> Your interpretation is correct, STAMP session is implicitly > > > defined as p2p. And that is what reflected in the STAMP YANG > > model. > > > Would the following text make it clearer: > > > NEW TEXT: > > > In this document, a measurement session also referred to as > > > STAMP session, is the session between one specific Session- > > Sender > > > and > > > one particular Session-Reflector for a time duration. > >=20 > > Yes, please include that definition. Question would it be clearer > > to > > replace ".. is the session betweeen .." with ".. is the bi- > > directional > > packet flows between .."?=20 >=20 > GIM2>> I agree, defining a session as a session makes is somewhat > repetitive. Thank you.=20 > Below is the updated text: > In this document, a measurement session also referred to as > STAMP session, is the bi-directional packet flow between one > specific > Session-Sender and one particular Session-Reflector for a time > duration. Looks good to me.=20 > >=20 > > > > 3. Section 4.1.1.: > > > > Timestamp is eight octets long field. STAMP node MUST > > > > support > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > format > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > support > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > timestamp > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > >=20 > > > > Is the clock source here something that may be relevant > > or > > > > simply > > > > information the management functions should capture. I > > > > think there is a > > > > similar issue to that of RTP faced when it comes to > > > > understand what the > > > > timestamp actually represent and thus be used > > correctly. > > > > RTP clock > > > > source specification is RFC 7273 > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > >=20 > > > GIM>> NTP and PTP encodings have a different interpretation of > > the > > > Fraction field of the Timestamp field. In my experience, PTP > > format > > > is native for the data plane, while NTP is more used at the > > control > > > plane. Original extension to TWAMP has been described in RFC > > 8186. > >=20 > > I think you missunderstood. When I talk about clock source, I am > > actually referring to identifying the particular clock that the > > node > > use to derive the included timestamp from.=20 > >=20 > > And likely this is a moot point in this document where the clock > > source > > information belongs in the management layer, e.g. in the YANG data > > model.=20 >=20 > GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-tlv) > provides information about the clock synchronization protocol and the > method by wich the timestamp has been acquired at a Session- > Reflector. We may extend it to list the name/locatior of the master > clock. Ok. sounds reasonable.=20 > >=20 > > > > 4. Section 4.1: > > > > Because STAMP supports symmetrical test packets, > > STAMP > > > > Session-Sender > > > > packet has a minimum size of 44 octets in unauthenticated > > mode, > > > > see > > > > Figure 2, and 112 octets in the authenticated mode, see > > Figure > > > > 4. > > > >=20 > > > > The above text implies some potential for UDP payload > > size > > > > variability > > > > for the STAMP packets. However, the actual definition > > > > appear to have > > > > fixed sizes. Can you please clarify if I have missed > > > > something that > > > > enables the STAMP packet to have variable size? > > >=20 > > > GIM>> I think that the text can be improved by characterizing the > > > listed sizes as "base". The variable length of a test packet in > > STAMP > > > is supported by using Extra Padding TLV defined in draft-ietf- > > ippm- > > > stamp-option-tlv. Below is the proposed update: > > > OLD TEXT: > > > Because STAMP supports symmetrical test packets, STAMP > > Session- > > > Sender > > > packet has a minimum size of 44 octets in unauthenticated > > mode, > > > see > > > Figure 2, and 112 octets in the authenticated mode, see Figure > > 4. > > > NEW TEXT: > > > STAMP supports symmetrical test packets. The base STAMP > > Session- > > > Sender packet has a minimum size of 44 octets in > > unauthenticated > > > mode, see Figure 2, and 112 octets in the authenticated mode, > > see > > > Figure 4. The variable length of a test packet in STAMP is > > > supported > > > by using Extra Padding TLV defined in > > > [I-D.ietf-ippm-stamp-option-tlv]. > > >=20 > > > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > > > moved to the Normative References list or may remain in the > > > Informative list? > >=20 > > From my perspective, the fact that optional TLV may occur following > > the > > base headers appears quite important. Here comes a question of > > intention form the WG. Is it intended that one can have STAMP > > endpoints > > that do not even support receiving packets larger than the base?=20 > > In other words there will be two main versions already now, one > > that > > supports some TLV and can at least handle the TLV skip forward and > > ignore the content and one that will throw a fit over the TLVs? If > > that > > is not the intention I think the fact that TLV's may occur should > > be > > moved into this specification and have it as a normative reference. >=20 > GIM2>> Will move the reference to the Normative section. With TLV > being normative, I'd expect that the intelligent implementation of > this draft, of the base STAMP specification, will accept any valid > STAMP packet though not process extensions. But the base STAMP > Session-Reflector will return the base reflected packet. =20 I think that is very reasonable approach. Are you close to complete the stamp-option-tlv document, or will the missref cause any issue?=20 > > I guess the answer is that you have backwards comaptibility reasons > > for > > not allowing TLVs at all in some sessions, or?=20 >=20 > GIM2>> Yes, that and the principle "keep it simple".=20 Thanks, To me it looks like with some text changes all my issues are addressed. Cheers Magnus Westerlund=20 ---------------------------------------------------------------------- Network Architecture & Protocols, Ericsson Research ---------------------------------------------------------------------- Ericsson AB | Phone +46 10 7148287 Torshamnsgatan 23 | Mobile +46 73 0949079 SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com ---------------------------------------------------------------------- --=-ln4CxXgh7n3O5E76ksr9 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEtww ggYHMIID76ADAgECAhALRm3NcHtuMGWutmt5cXntMA0GCSqGSIb3DQEBCwUAMEcxCzAJBgNVBAYT AlNFMREwDwYDVQQKDAhFcmljc3NvbjElMCMGA1UEAwwcRXJpY3Nzb24gTkwgSW5kaXZpZHVhbCBD QSB2MzAeFw0xNzEyMTUwNzIyMjNaFw0yMDEyMTUwNzIyMjJaMHAxETAPBgNVBAoMCEVyaWNzc29u MRowGAYDVQQDDBFNYWdudXMgV2VzdGVybHVuZDEtMCsGCSqGSIb3DQEJARYebWFnbnVzLndlc3Rl 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SMTP id p20mr6387087ljg.36.1568919359286; Thu, 19 Sep 2019 11:55:59 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Thu, 19 Sep 2019 11:55:47 -0700 Message-ID: To: Tommy Pauly Cc: IETF IPPM WG , draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org, 6man WG , Mirja Kuehlewind Content-Type: multipart/alternative; boundary="00000000000017716c0592ec814f" Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Thu, 19 Sep 2019 18:56:05 -0000 --00000000000017716c0592ec814f Content-Type: text/plain; charset="UTF-8" Dear Authors, et al., I have a number of questions on this draft and hope you'll find time to clarify some aspects of iOAM encapsulation in IPv6 EHs: - format of both Hop-by-Hop Options header and Destination Options header, as defined in RFC 8200, allow the length of Options field in the header to be no more than 2K - 2 octets. I consider that to be an important limitation of the proposed encapsulation method but I don't find that being discussed in the document. - Section 3 of your draft defines iOAM Option encapsulation format. How this encapsulation relates to the encapsulation of IPv6 options for the Hop-by-Hop Options header and Destination Options header? - Section 4.2 in RFC 8200 defines four types of actions to be associated with the option. Which of these and in what scenarios may be used to carry iOAM information in IPv6 packet? - Also, in Section 4.2 defined on-bit long flag in the Option Type field to indicate whether option data may change en route. How this flag will be used when iOAM option data encapsulated in IPv6 EHs? - Further, the question of choosing a padding option - Pad1 or PadN? Which these two to be used for iOAM data in IPv6 EHs? With this number of technical issues being underspecified, I don't support the adoption of the draft by IPPM WG. And I feel that it would be more appropriate to ask 6man WG to host this work. Regards, Greg On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly wrote: > Hello IPPM, > > This email starts a working group adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the IPv6 > option encapsulation for IOAM data. This document was discussed with the > 6man WG, which advised that the work be done in ippm, with review by 6man. > > The documents are available here: > > > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/ > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 > > Please reply to this email by Wednesday, September 25, with your input on > whether or not the WG should adopt this document. > > Best, > Tommy (as IPPM co-chair) > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm > --00000000000017716c0592ec814f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear Authors, et al.,
I have a number of questions on = this draft and hope you'll find time to clarify some aspects of iOAM en= capsulation in IPv6 EHs:
  • format of both Hop-by-Hop Option= s header and Destination Options header, as defined in RFC 8200, allow the = length of Options field in the header to be no more than 2K - 2 octets. I c= onsider that to be an important limitation of the proposed encapsulation me= thod but I don't find that being discussed in the document.
  • Sec= tion 3 of your draft defines iOAM Option encapsulation=C2=A0format. How thi= s encapsulation relates to the encapsulation of IPv6 options for the Hop-by= -Hop Options header and Destination Options header?
  • Section 4.2 in = RFC 8200 defines four types of actions to be associated with the option. Wh= ich of these and in what scenarios may be used to carry iOAM information in= IPv6 packet?
  • Also, in Section 4.2 defined on-bit long flag in the = Option Type field to indicate whether option data may change en route. How = this flag will be used when iOAM option data encapsulated in IPv6 EHs?
    • =
  • Further, the question of choosing a padding option - Pad1 or PadN? Whic= h these two to be used for iOAM data in IPv6 EHs?
With this n= umber of technical issues being underspecified, I don't support the ado= ption of the draft by IPPM WG. And I feel that it would be more appropriate= to ask 6man WG to host this work.

Regards,<= /div>
Greg

On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly <tpauly= =3D40apple.com@dmarc.ietf.org= > wrote:
= Hello IPPM,

This email starts a working group adoption call for draft-ioametal-ippm-6ma= n-ioam-ipv6-options. This document defines the IPv6 option encapsulation fo= r IOAM data. This document was discussed with the 6man WG, which advised th= at the work be done in ippm, with review by 6man.

The documents are available here:

https://datatracker.ietf= .org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/
https://tools.ietf.org/html= /draft-ioametal-ippm-6man-ioam-ipv6-options-02

Please reply to this email by Wednesday, September 25, with your input on w= hether or not the WG should adopt this document.

Best,
Tommy (as IPPM co-chair)
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--00000000000017716c0592ec814f-- From nobody Thu Sep 19 14:18:16 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3DCF612018D for ; Thu, 19 Sep 2019 14:18:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -17.499 X-Spam-Level: X-Spam-Status: No, score=-17.499 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=google.com 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 18efYh-fa9yx for ; Thu, 19 Sep 2019 14:18:12 -0700 (PDT) Received: from mail-yw1-xc2a.google.com (mail-yw1-xc2a.google.com [IPv6:2607:f8b0:4864:20::c2a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 56D6F12006A for ; Thu, 19 Sep 2019 14:18:12 -0700 (PDT) Received: by mail-yw1-xc2a.google.com with SMTP id r134so1770988ywg.2 for ; Thu, 19 Sep 2019 14:18:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=b5rf0TSEyPUe4qhLAW7pzXvomSLe0yha1HB5Id1TxmU=; b=cs1mLbIkyn+EKyz8lJ292tUiPtPRyuHVKYJ03MkbVSDrS9dX0xbk/f1cj6r4rLP5QG BFvmKb1Ep2Fo7vnN77uKaYd/nVdBKvjjTKnIqdx6eorMlenM08wdMyO4s8Izjs83WHES VzXLq8L7DAk/q6v+yi3WoBfQ7yaClinpbqZ+Fy1MKCgfVMzBw8es2/XGhitPmsb/bmaJ TsESUvzwn2nO5N7vi7sFkYRdjAwY4BTD9kfPmWvd9gjSyIKRJbYdMywH8jk13TrhaPoc wU7oSUPZruLoXoD+znlyXJaebwOrPhMPEc8iTFKssCpbCztPq1EITQIx6pQlUwjz0acM zjNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=b5rf0TSEyPUe4qhLAW7pzXvomSLe0yha1HB5Id1TxmU=; b=VQ7X2+nhHt7Iq6gr20rxgDB5kW6I5Gmd0jiIkhEK96qDeIV9Pj9CjOTQQ4KiM684VC AaI1X74A9EWHRz4Aq09qEgtMSRO2IBHknek5dAZA0jyhEIytqRNKIrUuE2HcE2Myq9PM aC3tbpY3lqDr2OqREuN2grXjhmFLdW6yNy4YWroQUawPUsqy3EF1b5ctynbboA6o1vn5 Y7rG/ImTECSI54NLtYWbxBt+BSmjjHmiRASuCtnKoKhRSE2k8L6OzGJTwoXvsHa02//N z5eKIFv4vmPC3QcceZc2ceM2Og1IqYQnPA3T/7DLnkO+jtyDKG1EDYuq0ehj5e0UQpds GOHg== X-Gm-Message-State: APjAAAWFEnrjUnW7Dpj18D7XAZ9J+WN6Q3Y15fECtRMUPIQQ85fvo99o m3DL/hAZ265EsRMWg/99XobWUIXsqxcXvCVLkxM4Bg== X-Google-Smtp-Source: APXvYqwUt+8g5usrBrs4kW6oPFmMUZH5YgeiSneDEtsgbhqn/CV41CFjjLrtHeL/EK2ApFXtcGSqDuhbDJE0qiMflNM= X-Received: by 2002:a0d:dd90:: with SMTP id g138mr9477315ywe.234.1568927891069; Thu, 19 Sep 2019 14:18:11 -0700 (PDT) MIME-Version: 1.0 References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> In-Reply-To: <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> From: Matt Mathis Date: Thu, 19 Sep 2019 14:17:58 -0700 Message-ID: To: "ALFRED C (AL)" , Ruediger.Geib@telekom.de Cc: "ippm@ietf.org" Content-Type: multipart/alternative; boundary="000000000000a098970592ee7d96" Archived-At: Subject: [ippm] Fwd: How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Thu, 19 Sep 2019 21:18:15 -0000 --000000000000a098970592ee7d96 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Ok, moving the thread to IPPM Some background, we (Measurement Lab) are testing a new transport (TCP) performance measurement tool, based on BBR-TCP. I'm not ready to talk about results yet (well ok, it looks pretty good). (BTW the BBR algorithm just happens to resemble the algorithm described in draft-morton-ippm-capcity-metric-method-00.) Anyhow we noticed some interesting performance features for number of ISPs in the US and Europe and I wanted to get some input for how these cases should be treated. One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, fluctuating performance ~75 Mb/s for ~1 second and then stable performance at ~83Mb/s for the rest of the 10 second test. If I were to guess this is probably a policer (shaper?) with a 1 MB token bucket and a ~83Mb/s token rate (these numbers are not corrected for header overheads, which actually matter with this tool). What is weird about it is that different ingress interfaces to the ISP (peers or serving locations) exhibit different parameters. Now the IPPM measurement question: Is the bulk transport capacity of this link ~94.5 Mbit/s or ~83Mb/s? Justify your answer....? Thanks, --MM-- The best way to predict the future is to create it. - Alan Kay We must not tolerate intolerance; however our response must be carefully measured: too strong would be hypocritical and risks spiraling out of control; too weak risks being mistaken for tacit approval. Forwarded Conversation Subject: How should capacity measurement interact with shaping? ------------------------ From: Matt Mathis Date: Thu, Aug 15, 2019 at 8:55 AM To: MORTON, ALFRED C (AL) We are seeing shapers with huge bucket sizes, perhaps as larger or larger than 100 MB. These are prohibitive to test by default, but can have a huge impact in some common situations. E.g. downloading software updates. An unconditional pass is not good, because some buckets are small. What counts as large enough to be ok, and what "derating" is ok? Thanks, --MM-- The best way to predict the future is to create it. - Alan Kay We must not tolerate intolerance; however our response must be carefully measured: too strong would be hypocritical and risks spiraling out of control; too weak risks being mistaken for tacit approval. ---------- From: MORTON, ALFRED C (AL) Date: Mon, Aug 19, 2019 at 5:08 AM To: Matt Mathis Cc: CIAVATTONE, LEN , Ruediger.Geib@telekom.de < Ruediger.Geib@telekom.de> Hi Matt, currently cruising between Crete and Malta, with about 7 days of vacation remaining =E2=80=93 Adding my friend Len. You know R=C3=BCdiger. It appears I=E2=80=99ve forgotten how to typs in 2 w= eeks given the number of typos I=E2=80=99ve fixed so far... We=E2=80=99ve seen big buffers on a basic DOCSIS cable service (downlink >2= sec) but, we have 1-way delay variation or RTT variation limits when searching for the max rate, that don=E2=80=99t many packets queue in the buffer we want the status messages that result in rate adjustment to return in a reasonable amount of time (50ms + RTT) we usually search for 10 seconds, but if we go back and test with a fixed rate, we can see the buffer growing if the rate is too high. There will eventually be a discussion on the thresholds we use in the search // load rate control algorithm. The copy of Y.1540 I sent you has a simple one, we moved beyond that now (see the slides I didn=E2=80=99t get to present at IETF). There is value in having some of this discussion on IPPM-list, so we get some **agenda time at IETF-106** We measure rate and performance, with some performance limits built-in. Pass/Fail is another step, de-rating too (made sense with MBM =E2=80=9Ctarget_rate=E2=80=9D). Al ---------- From: Date: Mon, Aug 26, 2019 at 12:05 AM To: Cc: , Hi Al, thanks for keeping me involved. I don=E2=80=99t have a precise answer and d= oubt, that there will be a single universal truth. If the aim is only to determine the IP bandwidth of an access, then we aren=E2=80=99t interested in filling a buffer. Buffering events may occur, = some of which are useful and to be expected, whereas others are not desired: - Sender shaping behavior may matter (is traffic at the source CBR or is it bursty) - Random collisions should be tolerated at the access whose bandwidth is to be measured. - Limiting packet drop due to buffer overflow is a design aim or an important part of the algorithm, I think. - Shared media might create bursts. I=E2=80=99m not an expert in the are= a, but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in som= e cases between a central sender using a shared medium and the receivers connected. WiFi and may b= e other wireless equipment buffers packets also to optimize wireless resou= rce optimization. - It might be an idea to mark some flows by ECN, once there=E2=80=99s a = guess on a sending bitrate when to expect no or very little packet drop. Today, t= his is experimental. CE marks by an ECN capable device should be expected roughly once queuing starts. Practically, the set-up should be configurable with commodity hard- and software and all metrics should be measurable at the receiver. Burstiness of traffic and a distinction between queuing events which are to be expected and (undesired) queue build up are the events to be distinguished. I hope that can be done with commodity hard- and software. I at least am not able to write down a simple metric distinguishing queues to be expected from (undesired) queue build up causing congestion. The hard- and software to be used should be part of the solution, not part of the problem (bursty source traffic and timestamps with insufficient accuracy to detect queues are what I=E2=80=99d like to avoid). I=E2=80=99d suggest to move discussion to the list. Regards, R=C3=BCdiger ---------- From: MORTON, ALFRED C (AL) Date: Thu, Sep 19, 2019 at 7:01 AM To: Ruediger.Geib@telekom.de Cc: CIAVATTONE, LEN , mattmathis@google.com < mattmathis@google.com> I=E2=80=99m catching-up with this thread again, but before I reply: *** Any objection to moving this discussion to IPPM-list ?? *** @Matt =E2=80=93 this is a question to you at this point... thanks, Al *From:* Ruediger.Geib@telekom.de [mailto:Ruediger.Geib@telekom.de] *Sent:* Monday, August 26, 2019 3:05 AM *To:* MORTON, ALFRED C (AL) *Cc:* CIAVATTONE, LEN ; mattmathis@google.com *Subject:* AW: How should capacity measurement interact with shaping? Hi Al, thanks for keeping me involved. I don=E2=80=99t have a precise answer and d= oubt, that there will be a single universal truth. If the aim is only to determine the IP bandwidth of an access, then we aren=E2=80=99t interested in filling a buffer. Buffering events may occur, = some of which are useful and to be expected, whereas others are not desired: - Sender shaping behavior may matter (is traffic at the source CBR or is it bursty) - Random collisions should be tolerated at the access whose bandwidth is to be measured. - Limiting packet drop due to buffer overflow is a design aim or an important part of the algorithm, I think. - Shared media might create bursts. I=E2=80=99m not an expert in the= area, but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in so= me cases between a central sender using a shared medium and the receivers connected. WiFi and may be other wireless equipment buffers packets also to optimize wireless resource optimization. - It might be an idea to mark some flows by ECN, once there=E2=80=99= s a guess on a sending bitrate when to expect no or very little packet drop. Today, this is experimental. CE marks by an ECN capable device should be expected roughly once queuing starts. --000000000000a098970592ee7d96 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Ok, moving the thread to IPPM

Some back= ground, we (Measurement=C2=A0Lab) are testing a new transport (TCP) perform= ance measurement tool, based on BBR-TCP.=C2=A0 =C2=A0I'm not ready to t= alk about results yet (well ok, it looks pretty good).=C2=A0 =C2=A0 (BTW th= e BBR algorithm just happens to resemble the algorithm=C2=A0described in=C2= =A0draft-morton-ippm-capcity-metric-method-00.)

An= yhow=C2=A0we noticed some interesting performance features for number of IS= Ps in the US and Europe and I wanted to get some input for how these cases = should be treated.

One data point, a single trace = saw ~94.5 Mbit/s for ~4 seconds, fluctuating=C2=A0performance ~75 Mb/s for = ~1 second and then stable performance=C2=A0at ~83Mb/s for the rest of the 1= 0 second test.=C2=A0 =C2=A0 If I were to guess this is probably a policer (= shaper?) with a 1 MB token bucket and a=C2=A0~83Mb/s token rate (these numb= ers are not corrected for header overheads, which actually matter with this= tool).=C2=A0 What is weird about it is that different ingress interfaces t= o the ISP (peers or serving=C2=A0locations) exhibit different parameters.= =C2=A0=C2=A0

Now the IPPM measurement question:=C2= =A0 =C2=A0Is the bulk transport capacity of this link=C2=A0~94.5 Mbit/s or= =C2=A0~83Mb/s?=C2=A0 =C2=A0Justify your answer....?

Thanks,
--MM--
The best way to predict the future is to create it.= =C2=A0- Alan Kay

We must not tolerate intolerance;
=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must be carefully mea= sured:=C2=A0
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;
=C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak risks being mistaken for tacit= approval.

F= orwarded Conversation
Subject: H= ow should capacity measurement interact with shaping?
-----------= -------------

From: Matt Mathi= s <= mattmathis@google.com>
Date: Thu, Aug 15, 2019 at 8:55 AM<= br>To: MORTON, ALFRED C (AL) <ac= m@research.att.com>


We are seeing = shapers=C2=A0 with huge bucket sizes, perhaps as larger or larger than 100 = MB.

These are prohibitive to test by default, but can ha= ve a huge impact in some common situations.=C2=A0 E.g. downloading software= updates.

An unconditional pass is not good, becau= se some buckets are small.=C2=A0 What counts as large enough to be ok, and = what "derating" is ok?

Thanks,
--MM--
The best way to = predict the future is to create it. =C2=A0- Alan Kay

We must not tol= erate intolerance;
=C2=A0 =C2=A0 =C2=A0 =C2=A0however= our response must be carefully measured:=C2=A0
=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 too strong would be hypocritical and risks spirali= ng out of control;
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too = weak risks being mistaken for tacit approval.
=


--------= --
From: MORTON, ALFRED = C (AL) <acm@research.att.com>
Date: Mon, Aug 19, 2019 at 5:08 = AM
To: Matt Mathis <mattmath= is@google.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>, Ruediger.Geib@telekom.de <Ruediger.Geib@telekom.de>


Hi Matt, currently cruising between Crete and = Malta,

with about 7 days of vacation remaining =E2=80= =93 Adding my friend Len.

You know R=C3=BCdiger. It appears I=E2=80=99ve= forgotten how to typs in 2 weeks

given the number of typos I=E2=80=99ve fixed s= o far...

=C2=A0

We=E2=80=99ve seen big buffers on a basic DOCS= IS cable service (downlink >2 sec)

but,

=C2=A0 we have 1-way delay variation or RTT va= riation limits

=C2=A0 when searching for the max rate, that d= on=E2=80=99t many packets

=C2=A0=C2=A0queue in the buffer<= /span>

=C2=A0

=C2=A0 we want the status messages that result= in rate adjustment to return

=C2=A0in a reasonable amount of time (50ms + R= TT)

=C2=A0

=C2=A0 we usually search for 10 seconds, but i= f we go back and test with

=C2=A0=C2=A0a fixed rate, we can see the buffe= r growing if the rate is too high.

=C2=A0

=C2=A0 There will eventually be a discussion o= n the thresholds we use

=C2=A0 in the search // load rate control algo= rithm. The copy of

=C2=A0=C2=A0Y.1540 I sent you has a simple one= , we moved beyond that now

=C2=A0 (see the slides I didn=E2=80=99t get to= present at IETF).

=C2=A0

=C2=A0 There is value in having some of this d= iscussion on IPPM-list,

=C2=A0 so we get some *agenda time at IETF-= 106*

=C2=A0

We measure rate and performance, with some per= formance limits

built-in.=C2=A0 Pass/Fail is another step, de-= rating too (made sense

with MBM =E2=80=9Ctarget_rate=E2=80=9D).

=C2=A0

Al



--------= --
From: <Ruediger.Geib@telekom.de>
Date: Mon, Aug 26, 2019 at 1= 2:05 AM
To: <acm@research.at= t.com>
Cc: <lc9892@att.com<= /a>>, <mattmathis@google.co= m>


Hi Al,

=C2=A0

thanks for keeping me involved. I do= n=E2=80=99t have a precise answer and doubt, that there will be a single un= iversal truth.

=C2=A0

If the aim is only to determine the = IP bandwidth of an access, then we aren=E2=80=99t interested in filling a b= uffer. Buffering events may occur, some of which are useful and to be expected, whereas others are not desire= d:

=C2=A0

  • Sender shaping behavior may matter (is traffic at the so= urce CBR or is it bursty)
  • Rando= m collisions should be tolerated at the access whose bandwidth is to be measured.
  • Limiting packet drop= due to buffer overflow is a design aim or an important part of the algorithm, I think.
  • Shared media might create bursts. I=E2=80=99m not an expert in the area, = but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in some cases between a = central sender using a shared medium and the receivers connected. WiFi and = may be other wireless equipment buffers packets also to optimize wireless r= esource optimization.
  • It might = be an idea to mark some flows by ECN, once there=E2=80=99s a guess on a sen= ding bitrate when to expect no or very little packet drop. Today, this is exper= imental. CE marks by an ECN capable device should be expected roughly once = queuing starts.

=C2=A0

Practically, the set-up should be co= nfigurable with commodity hard- and software and all metrics should be meas= urable at the receiver. Burstiness of traffic and a distinction between queuing events which are t= o be expected and (undesired) queue build up are the events to be distingui= shed. I hope that can be done with commodity hard- and software. I at least= am not able to write down a simple metric distinguishing queues to be expected from (undesired) queue build u= p causing congestion. The hard- and software to be used should be part of t= he solution, not part of the problem (bursty source traffic and timestamps = with insufficient accuracy to detect queues are what I=E2=80=99d like to avoid).

=C2=A0

I=E2=80=99d suggest to move discussi= on to the list.

=C2=A0

Regards,

=C2=A0

R=C3=BCdiger



--------= --
From: MORTON, ALFRED = C (AL) <acm@research.att.com>
Date: Thu, Sep 19, 2019 at 7:01 = AM
To: Ruediger.Geib@telekom= .de <Ruediger.Geib@telek= om.de>
Cc: CIAVATTONE, LEN <= lc9892@att.com>, mattmathis= @google.com <mattmathis@goo= gle.com>


I=E2=80=99m catching-up with this thread again= , but before I reply:

=C2=A0

*** Any objection to moving this discussion to= IPPM-list ?? ***

=C2=A0

@Matt =E2=80=93 this is a question to you at t= his point...

=C2=A0

thanks,

Al

<= span style=3D"font-size:11.0pt;font-family:"Courier New";color:bl= ack">=C2=A0

From: Ruediger.Geib@telekom.de [mailto:Ruediger.Geib@telek= om.de]
Sent: Monday, August 26, 2019 3:05 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>; mattmathis@google.com
Subject: AW: How should capacity measurement interact with shaping?<= u>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved. I don=E2=80=99t hav= e a precise answer and doubt, that there will be a single universal truth.

=C2=A0

If the aim is only to determine the IP bandwidth of= an access, then we aren=E2=80=99t interested in filling a buffer. Bufferin= g events may occur, some of which are useful and to be expected, whereas others are not desired:

=C2=A0

-=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Sender shaping behavior may matter (is traffic= at the source CBR or is it bursty)

-=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Random collisions should be tolerated at the a= ccess whose bandwidth is to be measured.

-=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Limiting packet drop due to buffer overflow is= a design aim or an important part of the algorithm, I think.=

-=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Shared media might create bursts. I=E2=80=99m = not an expert in the area, but there=E2=80=99s an =E2=80=9Cis bandwidth ava= ilable=E2=80=9D check in some cases between a central sender using a shared medium and the receivers connected. WiFi and may be other wireless equipme= nt buffers packets also to optimize wireless resource optimization.<= u>

-=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 It might be an idea to mark some flows by ECN,= once there=E2=80=99s a guess on a sending bitrate when to expect no or ver= y little packet drop. Today, this is experimental. CE marks by an ECN capable device should be expected roughly once queuing = starts.



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Thread-Index: AQHVU4HrkoUGktYwE0yJQr8LfUwZ06b/aQHwgAQxteCAL6Jm4IAAvlkA//++dPA= Date: Thu, 19 Sep 2019 22:34:52 +0000 Message-ID: <4D7F4AD313D3FC43A053B309F97543CFA0AF94D0@njmtexg5.research.att.com> References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.141.203.172] Content-Type: multipart/alternative; boundary="_000_4D7F4AD313D3FC43A053B309F97543CFA0AF94D0njmtexg5researc_" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-19_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909190189 Archived-At: Subject: Re: [ippm] How should capacity measurement interact with shaping? 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<4D7F4AD313D3FC43A053B309F97543CFA0AF94D0@njmtexg5.research.att.com> From: Matt Mathis Date: Thu, 19 Sep 2019 18:43:19 -0700 Message-ID: To: "MORTON, ALFRED C (AL)" Cc: "Ruediger.Geib@telekom.de" , "ippm@ietf.org" , "CIAVATTONE, LEN" Content-Type: multipart/alternative; boundary="0000000000009f0c6a0592f2322d" Archived-At: Subject: Re: [ippm] How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Fri, 20 Sep 2019 01:43:39 -0000 --0000000000009f0c6a0592f2322d Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I am actually more interested in the philosophical questions about how this should be reported, and what should the language be about non-stationary available capacity. One intersecting issue: BBR converges on both the initial and final rate in under 2 seconds (this was a long path, so startup took more than a second). Do users want a quick (and relatively cheap) test that takes 2 seconds or a longer test that is more likely to discover the token bucket? How long? If we want to call them different names, what should they be? On the pure technical issues: BBR is still quite a moving target. I have a paper in draft that will shed some light on this. It is due to be unembargoed sometime in October. BBRv1 (released slightly after the cacm paper you mention) measures the max_BW every 8 RTT. BBRv2 measures the max_BW on a sliding schedule that loosely matches CUBIC. (In both, min_RTT is measured every 10 seconds, in the absence of organic low RTT samples). BBRv2 uses additional signals and does a much better job of avoiding overshoot at the startup. In any case the best (most stable) BBR based metric seems to be delta(snd.una)/elapsed_time, which is the progress as seen by upper layers. If you look at short time slices (we happen to be using 0.25 seconds) you see a mostly crisp square wave. If you average from the beginning of the connection to now, the peak rate happens at the moment the bucket runs out of tokens, and falls towards the toke rate after that. Thanks, --MM-- The best way to predict the future is to create it. - Alan Kay We must not tolerate intolerance; however our response must be carefully measured: too strong would be hypocritical and risks spiraling out of control; too weak risks being mistaken for tacit approval. On Thu, Sep 19, 2019 at 3:35 PM MORTON, ALFRED C (AL) wrote: > Thanks Matt! This is an interesting trace to consider, > > and an important discussion to share with the group. > > > > When I look at the equation for BBR: > > > https://cacm.acm.org/magazines/2017/2/212428-bbr-congestion-based-congest= ion-control/fulltext > > > > both BBR and Maximum IP-layer Capacity Metric seek the > > Max over some time interval. The window seems smaller for > > BBR: 6 to 10 RTTs, where we=E2=80=99ve been using parameters that > > result in a rate measurement once a second and take the max > > of the 10 one-second measurements. > > > > We=E2=80=99ve also evaluate several performance metrics when > > adjusting load, and that determines how high the sending > > rate will go (based on feedback from the receiver). > > > https://tools.ietf.org/html/draft-morton-ippm-capcity-metric-method-00#se= ction-4.3 > > > > So, it seems that the MAX delivered rate for the 10 second test, we > > can all see is 94.5 Mbps. This rate was sustained for more > > than a trivial amount of time, too. But if you are concerned that this > > rate was somehow inflated by a large buffer and a large > > burst tolerance in the shaper =E2=80=93 that=E2=80=99s where the addition= al > > metrics and slightly different sending rate control > > that we described in the draft (and the slides) might help. > > > https://datatracker.ietf.org/meeting/105/materials/slides-105-ippm-metric= s-and-methods-for-ip-capacity-00 > > > > IOW, it might well be that Max IP Capacity, measured as we designed > > and parameterized it, measures 83 Mbps for this path > > (assuming the 94.5 is the result of big overshoot at sender, and the > > fluctuating performance afterward seems to support that). > > > > When I was looking for background on BBR, I saw a paper comparing > > BBR and CUBIC during drive tests. > > http://web.cs.wpi.edu/~claypool/papers/driving-bbr/ > > One pair of plots seemed to indicate that BBR sent lots of Bytes > > early-on, and grew the RTT pretty high before settling down > > (Figure 5, a & b). > > This looks a bit like the case you described below, > > except 94.5 Mbps is a Received Rate =E2=80=93 we don=E2=80=99t know > > what came out of the network, just what went in and filled > > a buffer before crashing down in the drive test. > > > > So, I think I did more investigation than justification > > for my answers, but I conclude the parameters like the > > individual measurement intervals and overall time interval > > from which the Max is drawn, plus the rate control algorithm > > itself, play a big role here. > > > > regards, > > Al > > > > > > *From:* Matt Mathis [mailto:mattmathis@google.com] > *Sent:* Thursday, September 19, 2019 5:18 PM > *To:* MORTON, ALFRED C (AL) ; > Ruediger.Geib@telekom.de > *Cc:* ippm@ietf.org > *Subject:* Fwd: How should capacity measurement interact with shaping? > > > > Ok, moving the thread to IPPM > > > > Some background, we (Measurement Lab) are testing a new transport (TCP) > performance measurement tool, based on BBR-TCP. I'm not ready to talk > about results yet (well ok, it looks pretty good). (BTW the BBR > algorithm just happens to resemble the algorithm described > in draft-morton-ippm-capcity-metric-method-00.) > > > > Anyhow we noticed some interesting performance features for number of ISP= s > in the US and Europe and I wanted to get some input for how these cases > should be treated. > > > > One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, > fluctuating performance ~75 Mb/s for ~1 second and then stable > performance at ~83Mb/s for the rest of the 10 second test. If I were t= o > guess this is probably a policer (shaper?) with a 1 MB token bucket and > a ~83Mb/s token rate (these numbers are not corrected for header overhead= s, > which actually matter with this tool). What is weird about it is that > different ingress interfaces to the ISP (peers or serving locations) > exhibit different parameters. > > > > Now the IPPM measurement question: Is the bulk transport capacity of > this link ~94.5 Mbit/s or ~83Mb/s? Justify your answer....? > > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > *Forwarded Conversation* > *Subject: How should capacity measurement interact with shaping?* > ------------------------ > > > > From: *Matt Mathis* > Date: Thu, Aug 15, 2019 at 8:55 AM > To: MORTON, ALFRED C (AL) > > > > We are seeing shapers with huge bucket sizes, perhaps as larger or large= r > than 100 MB. > > > > These are prohibitive to test by default, but can have a huge impact in > some common situations. E.g. downloading software updates. > > > > An unconditional pass is not good, because some buckets are small. What > counts as large enough to be ok, and what "derating" is ok? > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > ---------- > From: *MORTON, ALFRED C (AL)* > Date: Mon, Aug 19, 2019 at 5:08 AM > To: Matt Mathis > Cc: CIAVATTONE, LEN , Ruediger.Geib@telekom.de < > Ruediger.Geib@telekom.de> > > > > Hi Matt, currently cruising between Crete and Malta, > > with about 7 days of vacation remaining =E2=80=93 Adding my friend Len. > > You know R=C3=BCdiger. It appears I=E2=80=99ve forgotten how to typs in 2= weeks > > given the number of typos I=E2=80=99ve fixed so far... > > > > We=E2=80=99ve seen big buffers on a basic DOCSIS cable service (downlink = >2 sec) > > but, > > we have 1-way delay variation or RTT variation limits > > when searching for the max rate, that don=E2=80=99t many packets > > queue in the buffer > > > > we want the status messages that result in rate adjustment to return > > in a reasonable amount of time (50ms + RTT) > > > > we usually search for 10 seconds, but if we go back and test with > > a fixed rate, we can see the buffer growing if the rate is too high. > > > > There will eventually be a discussion on the thresholds we use > > in the search // load rate control algorithm. The copy of > > Y.1540 I sent you has a simple one, we moved beyond that now > > (see the slides I didn=E2=80=99t get to present at IETF). > > > > There is value in having some of this discussion on IPPM-list, > > so we get some **agenda time at IETF-106** > > > > We measure rate and performance, with some performance limits > > built-in. Pass/Fail is another step, de-rating too (made sense > > with MBM =E2=80=9Ctarget_rate=E2=80=9D). > > > > Al > > > > ---------- > From: > Date: Mon, Aug 26, 2019 at 12:05 AM > To: > Cc: , > > > > Hi Al, > > > > thanks for keeping me involved. I don=E2=80=99t have a precise answer and= doubt, > that there will be a single universal truth. > > > > If the aim is only to determine the IP bandwidth of an access, then we > aren=E2=80=99t interested in filling a buffer. Buffering events may occur= , some of > which are useful and to be expected, whereas others are not desired: > > > > - Sender shaping behavior may matter (is traffic at the source CBR or > is it bursty) > - Random collisions should be tolerated at the access whose bandwidth > is to be measured. > - Limiting packet drop due to buffer overflow is a design aim or an > important part of the algorithm, I think. > - Shared media might create bursts. I=E2=80=99m not an expert in the a= rea, but > there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in s= ome cases between a central > sender using a shared medium and the receivers connected. WiFi and may= be > other wireless equipment buffers packets also to optimize wireless res= ource > optimization. > - It might be an idea to mark some flows by ECN, once there=E2=80=99s = a guess > on a sending bitrate when to expect no or very little packet drop. Tod= ay, > this is experimental. CE marks by an ECN capable device should be expe= cted > roughly once queuing starts. > > > > Practically, the set-up should be configurable with commodity hard- and > software and all metrics should be measurable at the receiver. Burstiness > of traffic and a distinction between queuing events which are to be > expected and (undesired) queue build up are the events to be distinguishe= d. > I hope that can be done with commodity hard- and software. I at least am > not able to write down a simple metric distinguishing queues to be expect= ed > from (undesired) queue build up causing congestion. The hard- and softwar= e > to be used should be part of the solution, not part of the problem (burst= y > source traffic and timestamps with insufficient accuracy to detect queues > are what I=E2=80=99d like to avoid). > > > > I=E2=80=99d suggest to move discussion to the list. > > > > Regards, > > > > R=C3=BCdiger > > > > ---------- > From: *MORTON, ALFRED C (AL)* > Date: Thu, Sep 19, 2019 at 7:01 AM > To: Ruediger.Geib@telekom.de > Cc: CIAVATTONE, LEN , mattmathis@google.com < > mattmathis@google.com> > > > > I=E2=80=99m catching-up with this thread again, but before I reply: > > > > *** Any objection to moving this discussion to IPPM-list ?? *** > > > > @Matt =E2=80=93 this is a question to you at this point... > > > > thanks, > > Al > > > > *From:* Ruediger.Geib@telekom.de [mailto:Ruediger.Geib@telekom.de] > *Sent:* Monday, August 26, 2019 3:05 AM > *To:* MORTON, ALFRED C (AL) > *Cc:* CIAVATTONE, LEN ; mattmathis@google.com > *Subject:* AW: How should capacity measurement interact with shaping? > > > > Hi Al, > > > > thanks for keeping me involved. I don=E2=80=99t have a precise answer and= doubt, > that there will be a single universal truth. > > > > If the aim is only to determine the IP bandwidth of an access, then we > aren=E2=80=99t interested in filling a buffer. Buffering events may occur= , some of > which are useful and to be expected, whereas others are not desired: > > > > - Sender shaping behavior may matter (is traffic at the source CBR > or is it bursty) > > - Random collisions should be tolerated at the access whose > bandwidth is to be measured. > > - Limiting packet drop due to buffer overflow is a design aim or > an important part of the algorithm, I think. > > - Shared media might create bursts. I=E2=80=99m not an expert in t= he area, > but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in = some cases between a > central sender using a shared medium and the receivers connected. WiFi an= d > may be other wireless equipment buffers packets also to optimize wireless > resource optimization. > > - It might be an idea to mark some flows by ECN, once there=E2=80= =99s a > guess on a sending bitrate when to expect no or very little packet drop. > Today, this is experimental. CE marks by an ECN capable device should be > expected roughly once queuing starts. > > > --0000000000009f0c6a0592f2322d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I am actually more interested in the philosophical qu= estions about how this should be reported, and what should the language be = about non-stationary available=C2=A0capacity.=C2=A0 =C2=A0One intersecting = issue: BBR converges on both the initial and final rate in under 2 seconds = (this was a long path, so startup took more than a second).=C2=A0 =C2=A0Do = users want a quick (and relatively cheap) test that takes 2 seconds or a lo= nger test that is more likely to discover the token bucket?=C2=A0 How long?= =C2=A0 If we want to call them different=C2=A0names, what should they be?

On the pure technical issues: BBR is still quite a = moving target.=C2=A0 =C2=A0I have a paper in draft that will shed some ligh= t on this.=C2=A0 It is due to be unembargoed=C2=A0sometime in October.
BBRv1 (released slightly after the cacm paper you mention) measures t= he max_BW every 8 RTT.=C2=A0 BBRv2 measures the max_BW on a sliding schedul= e that loosely=C2=A0matches CUBIC.=C2=A0 (In both, min_RTT is measured ever= y 10 seconds, in the absence of organic low RTT samples).=C2=A0 =C2=A0BBRv2= uses additional signals and does a much better job of avoiding overshoot a= t the startup.

In any case the best (most stable) = BBR based metric seems to be delta(snd.una)/elapsed_time, which is the prog= ress=C2=A0as seen by upper layers.=C2=A0 If you look at short time slices (= we happen to be using 0.25 seconds) you see a mostly crisp square wave.=C2= =A0 If you average from the beginning of the connection to now, the peak ra= te happens at the moment the bucket runs out of tokens, and falls towards t= he toke rate after that.

Thanks,
--MM--
= The best way to predict the future is to create it. =C2=A0- Alan Kay
We must not tolerate intolerance;
=C2=A0 =C2=A0 =C2= =A0 =C2=A0however our response must be carefully measured:=C2=A0
= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong would be hypocritical = and risks spiraling out of control;
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 too weak risks being mistaken for tacit approval.
=


On Thu, Sep 19, 2019 at 3:35 PM MOR= TON, ALFRED C (AL) <acm@research= .att.com> wrote:

Thanks Matt!=C2=A0 This is an interesting = trace to consider,

and an important discussion to share with = the group.

=C2=A0

When I look at the equation for BBR:

https://cacm.acm.org/magazines/2017/2/212428-bbr-congestion-based-co= ngestion-control/fulltext

=C2=A0

both BBR and Maximum IP-layer Capacity Met= ric seek the

Max over some time interval. The window se= ems smaller for

BBR: 6 to 10 RTTs, where we=E2=80=99ve bee= n using parameters that

result in a rate measurement once a second= and take the max

of the 10 one-second measurements.

=C2=A0

We=E2=80=99ve also evaluate several perfor= mance metrics when

adjusting load, and that determines how hi= gh the sending

rate will go (based on feedback from the r= eceiver).

http= s://tools.ietf.org/html/draft-morton-ippm-capcity-metric-method-00#section-= 4.3

=C2=A0

So, it seems that the MAX delivered rate f= or the 10 second test, =C2=A0we

can all see is 94.5 Mbps. This rate was su= stained for more

than a trivial amount of time, too. But if= you are concerned that this

rate was somehow inflated by a large buffe= r and a large

burst tolerance in the shaper =E2=80=93 th= at=E2=80=99s where the additional

metrics and slightly different sending rat= e control

that we described in the draft (and the sl= ides) might help.

https://datatracker.ietf.org/meeting/105/materials/slide= s-105-ippm-metrics-and-methods-for-ip-capacity-00<= /p>

=C2=A0

IOW, it might well be that Max IP Capacity= , measured as we designed

and parameterized it, measures 83 Mbps for= this path

(assuming the 94.5 is the result of big ov= ershoot at sender, and the

fluctuating performance afterward seems to= support that).

=C2=A0

When I was looking for background on BBR, = I saw a paper comparing

BBR and CUBIC during drive tests.

http://web.cs.wpi.edu/~claypool/pap= ers/driving-bbr/

One pair of plots seemed to indicate that = BBR sent lots of Bytes

early-on, and grew the RTT pretty high bef= ore settling down

(Figure 5, a & b).

This looks a bit like the case you describ= ed below,

except 94.5 Mbps is a Received Rate =E2=80= =93 we don=E2=80=99t know

what came out of the network, just what we= nt in and filled

a buffer before crashing down in the drive= test.

=C2=A0

So, I think I did more investigation than = justification

for my answers, but I conclude the paramet= ers like the

individual measurement intervals and overa= ll time interval

from which the Max is drawn, plus the rate= control algorithm

itself, play a big role here.

=C2=A0

regards,

Al

=C2=A0

<= span style=3D"font-size:11pt;font-family:"Courier New",serif;colo= r:black">=C2=A0

From: Matt Mathis [mailto:mattmathis@google.com]
Sent: Thursday, September 19, 2019 5:18 PM
To: MORTON, ALFRED C (AL) <acm@research.att.com>; Ruediger.Geib@telekom.de
Cc: ippm@ietf.org=
Subject: Fwd: How should capacity measurement interact with shaping?=

=C2=A0

Ok, moving the thread to IPPM

=C2=A0

Some background, we (Measurement=C2=A0Lab) are testi= ng a new transport (TCP) performance measurement tool, based on BBR-TCP.=C2= =A0 =C2=A0I'm not ready to talk about results yet (well ok, it looks pr= etty good).=C2=A0 =C2=A0 (BTW the BBR algorithm just happens to resemble the algorithm=C2=A0described in=C2=A0draft-morton-ippm-capcity-me= tric-method-00.)

=C2=A0

Anyhow=C2=A0we noticed some interesting performance = features for number of ISPs in the US and Europe and I wanted to get some i= nput for how these cases should be treated.

=C2=A0

One data point, a single trace saw ~94.5 Mbit/s for = ~4 seconds, fluctuating=C2=A0performance ~75 Mb/s for ~1 second and then st= able performance=C2=A0at ~83Mb/s for the rest of the 10 second test.=C2=A0 = =C2=A0 If I were to guess this is probably a policer (shaper?) with a 1 MB token bucket and a=C2=A0~83Mb/s token rate (these numbers are = not corrected for header overheads, which actually matter with this tool).= =C2=A0 What is weird about it is that different ingress interfaces to the I= SP (peers or serving=C2=A0locations) exhibit different parameters.=C2=A0=C2=A0

=C2=A0

Now the IPPM measurement question:=C2=A0 =C2=A0Is th= e bulk transport capacity of this link=C2=A0~94.5 Mbit/s or=C2=A0~83Mb/s?= =C2=A0 =C2=A0Justify your answer....?

=C2=A0

Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

Forwarded Conversa= tion
Subject: How should capacity measurement interact with shaping?
------------------------

=C2=A0

From: Matt Mathis <mattmathis@google.com>
Date: Thu, Aug 15, 2019 at 8:55 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>

=C2=A0

We are seeing shapers=C2=A0 with huge bucket sizes, = perhaps as larger or larger than 100 MB.

=C2=A0

These are prohibitive to test by default, but can ha= ve a huge impact in some common situations.=C2=A0 E.g. downloading software= updates.

=C2=A0

An unconditional pass is not good, because some buck= ets are small.=C2=A0 What counts as large enough to be ok, and what "d= erating" is ok?


Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

---------- From: MORTON, ALFRED C (AL) <acm@research.att.com>
Date: Mon, Aug 19, 2019 at 5:08 AM
To: Matt Mathis <mattmathis@google.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>, Ruediger.Geib@telekom.de <Ruediger.Geib@telekom.de>

=C2=A0

Hi Matt, currently cruising between Crete = and Malta,

with about 7 days of vacation remaining = =E2=80=93 Adding my friend Len.

You know R=C3=BCdiger. It appears I=E2=80= =99ve forgotten how to typs in 2 weeks

given the number of typos I=E2=80=99ve fix= ed so far...

=C2=A0

We=E2=80=99ve seen big buffers on a basic = DOCSIS cable service (downlink >2 sec)

but,

=C2=A0 we have 1-way delay variation or RT= T variation limits

=C2=A0 when searching for the max rate, th= at don=E2=80=99t many packets

=C2=A0=C2=A0queue in the buffer<= /u>

=C2=A0

=C2=A0 we want the status messages that re= sult in rate adjustment to return

=C2=A0in a reasonable amount of time (50ms= + RTT)

=C2=A0

=C2=A0 we usually search for 10 seconds, b= ut if we go back and test with

=C2=A0=C2=A0a fixed rate, we can see the b= uffer growing if the rate is too high.

=C2=A0

=C2=A0 There will eventually be a discussi= on on the thresholds we use

=C2=A0 in the search // load rate control = algorithm. The copy of

=C2=A0=C2=A0Y.1540 I sent you has a simple= one, we moved beyond that now

=C2=A0 (see the slides I didn=E2=80=99t ge= t to present at IETF).

=C2=A0

=C2=A0 There is value in having some of th= is discussion on IPPM-list,

=C2=A0 so we get some *agenda time at I= ETF-106*

=C2=A0

We measure rate and performance, with some= performance limits

built-in.=C2=A0 Pass/Fail is another step,= de-rating too (made sense

with MBM =E2=80=9Ctarget_rate=E2=80=9D).

=C2=A0

Al

=C2=A0

---------- From: <Rue= diger.Geib@telekom.de>
Date: Mon, Aug 26, 2019 at 12:05 AM
To: <acm@resea= rch.att.com>
Cc: <lc9892@att.com<= /a>>, <mat= tmathis@google.com>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved. I don=E2=80=99t have a precise an= swer and doubt, that there will be a single universal truth.

=C2=A0

If the aim is only to determine the IP bandwidth of an access, th= en we aren=E2=80=99t interested in filling a buffer. Buffering events may occur, some of which are useful and to be expected, whereas oth= ers are not desired:

=C2=A0

  • Sender shapin= g behavior may matter (is traffic at the source CBR or is it bursty)=
  • Random collis= ions should be tolerated at the access whose bandwidth is to be measured.
  • Limiting pack= et drop due to buffer overflow is a design aim or an important part of the = algorithm, I think.
  • Shared media = might create bursts. I=E2=80=99m not an expert in the area, but there=E2=80= =99s an =E2=80=9Cis bandwidth available=E2=80=9D check in some cases betwee= n a central sender using a shared medium and the receivers connected. WiFi and may be other wireless equipment buffers packets also to optimize = wireless resource optimization.
  • It might be a= n idea to mark some flows by ECN, once there=E2=80=99s a guess on a sending= bitrate when to expect no or very little packet drop. Today, this is exper= imental. CE marks by an ECN capable device should be expected roughly once queuing starts.

=C2=A0

Practically, the set-up should be configurable with commodity har= d- and software and all metrics should be measurable at the receiver. Burstiness of traffic and a distinction between queuing e= vents which are to be expected and (undesired) queue build up are the event= s to be distinguished. I hope that can be done with commodity hard- and sof= tware. I at least am not able to write down a simple metric distinguishing queues to be expected from (unde= sired) queue build up causing congestion. The hard- and software to be used= should be part of the solution, not part of the problem (bursty source tra= ffic and timestamps with insufficient accuracy to detect queues are what I=E2=80=99d like to avoid).

=C2=A0

I=E2=80=99d suggest to move discussion to the list.

=C2=A0

Regards,

=C2=A0<= /p>

R=C3=BCdiger

=C2=A0

---------- From: MORTON, ALFRED C (AL) <acm@research.att.com>
Date: Thu, Sep 19, 2019 at 7:01 AM
To: Ruediger.= Geib@telekom.de <Ruediger.Geib@telekom.de>
Cc: CIAVATTONE, LEN <lc9892@att.com>, mattmathis@google.com <mattmathis@google.com>

=C2=A0

I=E2=80=99m catching-up with this thread a= gain, but before I reply:

=C2=A0

*** Any objection to moving this discussio= n to IPPM-list ?? ***

=C2=A0

@Matt =E2=80=93 this is a question to you = at this point...

=C2=A0

thanks,

Al

=C2=A0

From: Ruediger.Geib= @telekom.de [mailto:Ruediger.Geib@telekom.de]
Sent: Monday, August 26, 2019 3:05 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>; mattmathis@googl= e.com
Subject: AW: How should capacity measurement interact with shaping?<= /span>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved. I don=E2=80=99t have a precise an= swer and doubt, that there will be a single universal truth.

=C2=A0

If the aim is only to determine the IP bandwidth of an access, th= en we aren=E2=80=99t interested in filling a buffer. Buffering events may occur, some of which are useful and to be expected, whereas oth= ers are not desired:

=C2=A0

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Sender= shaping behavior may matter (is traffic at the source CBR or is it bursty)=

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Random= collisions should be tolerated at the access whose bandwidth is to be meas= ured.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Limiti= ng packet drop due to buffer overflow is a design aim or an important part = of the algorithm, I think.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Shared= media might create bursts. I=E2=80=99m not an expert in the area, but ther= e=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in some cases= between a central sender using a shared medium and the receivers connected. WiFi and may be other wireless equipment buffers packets also t= o optimize wireless resource optimization.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 It mig= ht be an idea to mark some flows by ECN, once there=E2=80=99s a guess on a = sending bitrate when to expect no or very little packet drop. Today, this i= s experimental. CE marks by an ECN capable device should be expected roughly once queuing starts.

=C2=A0

--0000000000009f0c6a0592f2322d-- From nobody Fri Sep 20 16:09:05 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id BA39512018D; Fri, 20 Sep 2019 16:08:54 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.102.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156902093468.5129.8817465542307586997@ietfa.amsl.com> Date: Fri, 20 Sep 2019 16:08:54 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-option-tlv-01.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Sep 2019 23:08:55 -0000 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 Two-way Active Measurement Protocol Optional Extensions Authors : Greg Mirsky Xiao Min Guo Jun Henrik Nydell Richard Foote Adi Masputra Filename : draft-ietf-ippm-stamp-option-tlv-01.txt Pages : 19 Date : 2019-09-20 Abstract: This document describes optional extensions to Simple Two-way Active Measurement Protocol (STAMP) which enable measurement performance metrics in addition to ones supported by the STAMP base specification. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-stamp-option-tlv-01 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-stamp-option-tlv-01 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-stamp-option-tlv-01 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Sat Sep 21 00:00:49 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 35EF31200C1 for ; Sat, 21 Sep 2019 00:00:48 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=rediffmail.com 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 JJXLdc50EHNB for ; Sat, 21 Sep 2019 00:00:45 -0700 (PDT) Received: from rediffmail.com (f4mail-235-189.rediffmail.com [202.137.235.189]) (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 BDD2C1200B3 for ; Sat, 21 Sep 2019 00:00:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rediffmail.com; s=mail; t=1569049240; bh=RWl+T8q6N/iByB2yKfvqmvrSt2EVafLspnijuT4zbDg=; h=MIME-Version:From:Date:Message-ID:Subject:To:Content-Type; b=SC2Gss5Wrl3usiiCIaB+FmV8knrndhFkFRNkQAn21fXGtDSi6f+xV15C+8OyXsOhH jByfLAT2sGNFi9jpYnjJaGgIDajB7wPh8jHk28xMgIk9Cw5Hx3to78QwHj1XqNwxdo RXUL0mqVWetlQ594bJAEnfeFDHrE+5uRob5N/TIs= Received: (qmail 24061 invoked by uid 510); 21 Sep 2019 07:00:40 -0000 x-m-msg: asd54ad564ad7aa6sd5as6d5; a6da7d6asas6dasd77; 5dad65ad5sd; X-OUT-VDRT-SpamState: 0\LEGIT X-OUT-VDRT-SpamScore: 0 X-OUT-VDRT-SpamCause: gggruggvucftvghtrhhoucdtuddrgedufedrvdefgdduudeiucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecufdftgfffkffhhfdpqfgfvfdfnecuuegrihhlohhuthemuceftddtnecunecujfgurhepffggvffkjghsuffhtgesrgdtreertddtjeenucfhrhhomhepfdfuuhguhhhinhdfuceoshhuughhihhnjhgrtghosgesrhgvughifhhfmhgrihhlrdgtohhmqeenucffohhmrghinhepihgvthhfrdhorhhgnecukfhppeeghedruddvjedrgeeirdelgeenucfrrghrrghmpehmohguvgepshhmthhpohhuthenucevlhhushhtvghrufhiiigvpedt X-Remote-IP: 45.127.46.94 X-REDF-OSEN: sudhinjacob@rediffmail.com Date: 21 Sep 2019 07:00:40 -0000 MIME-Version: 1.0 To: Received: from unknown 45.127.46.94 by rediffmail.com via HTTP; 21 Sep 2019 07:00:40 -0000 X-Senderscore: D=0&S=0 Message-ID: <1568883213.S.19722.5151.f5-147-237.1569049240.23926@webmail.rediffmail.com> In-Reply-To: <334dd219fc554cec85ec5258cc4c9de9@huawei.com> Sender: sudhinjacob@rediffmail.com From: "Sudhin" Cc: Content-Type: multipart/alternative; boundary="=_74830d0b4baac54a7b236bd293e5ad46" Archived-At: Subject: Re: [ippm] =?utf-8?q?https=3A//tools=2Eietf=2Eorg/id/draft-ietf-ippm?= =?utf-8?q?-multipoint-alt-mark-02=2Etxt?= X-BeenThere: ippm@ietf.org 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, 21 Sep 2019 07:00:48 -0000 --=_74830d0b4baac54a7b236bd293e5ad46 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="UTF-8" Hi Giuseppe, Let me thank you for the reply. Let me go through it and I will get back. Regards, Sudhin On Thu, 19 Sep 2019 14:23:33 +0530 Giuseppe Fioccola wrote > Hi Sudhin, Thank you for your very useful review. You can find my answers inline tagged as [GF]. Please let me know if this clarify. If yes, you may want to publish your questions to the IPPM mailing list. Regards, Giuseppe From: sudhinjacob@rediffmail.com [mailto:sudhinjacob@rediffmail.com] Sent: Monday, September 16, 2019 11:04 AM To: Giuseppe Fioccola Subject: REG: https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-02.txt Hi Giuseppe, I had gone through the draft. Could you please clarify the following. 1. The BUM traffic is very significant in the network, could you please let me know the reason for excluding it. Excluding that the accuracy of traffic measurement is affected. [GF]: Agree, BUM traffic is significant and it is not excluded here. It can be monitored by using the basic RFC 8321, since RFC 8321 applies to point-to-point unicast flows and BUM traffic. The Multipoint alternate marking and its Clustering approach is valid for multipoint-to-multipoint unicast flows. I will highlight it better in the Introduction. 2. Could you please let me know how the out of order packet are handled. [GF]: Out of order packets happen and are handled by reducing consequently the available counting interval. These aspects are described in Section 7. In particular three different possible constraints are considered: clock error between network devices, network delay between measurement points and the misalignment between the marking source routers. 3. There will be ECMP paths, how this measurement will take care of it. [GF]: ECMP paths are point-to-multipoint unicast flows so, by definition, they can be easily monitored with this technique. I will add a sentence on this in the Introduction or in Section 3. 4. How do we collect the data, the draft is silent of flow measurement. [GF]: The draft aims to define especially the methodology as the extension of RFC 8321. However, Section 9 introduces the idea of an Intelligent Performance Management and suggests that an SDN Orchestrator or a Controller can apply this methodology since it is aware of the network topology. In addition, Section 3 introduces the generalization of the flow definition. 5. What will happen when re write rules are applied which gives an erroneous output isnt it. [GF]: Yes, there is a transient time to wait once new rules are configured and it can be determined by the network management. I can add a sentence on this in Section 9. 6. In delay measurement, the draft didnt explain the start of the time measurement, the networks elements are not synced properly there will be a delta. Since there is no explicit signalling of timestamp. could you please explain how this is done. [GF]: The delay measurements can be done similarly to RFC 8321. The marking batches anchor the samples to a particular period so this is the time reference that can be used (each block of packets can also be numbered if needed). As reported in Section 7, compared to RFC 8321, the only additional contribution to consider is the misalignment between the marking source routers and, as you said, there is a delta that reduces the available measurement interval. I can specify in the Section 8 that the timing aspects applies to delay measurements as well. Regards, Sudhin --=_74830d0b4baac54a7b236bd293e5ad46 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="UTF-8" Hi Giuseppe,

Let me thank you for the reply. Let me go through it and I will get back.
Regards,
Sudhin

On Thu, 19 Sep 2019 14:23:33 +0530 Giuseppe Fioccola wrote
>







Hi Sudhin,
Thank you for your very useful review. You can find my answers inline tagge= d as [GF].
Please let me know if this clarify.
If yes, you may want to publish your questions to the IPPM mailing list.
Regards,

Giuseppe

From: sudhinjacob@rediffmail.com [mailto:sudhinjacob@rediffmail.com]


Sent: Monday, September 16, 2019 11:04 AM

To: Giuseppe Fioccola

Subject: REG: https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark= -02.txt

Hi Giuseppe,



I had gone through the draft. Could you please clarify the following.





1. The BUM traffic is very significant in the network, could you please let= me know the reason for


excluding it. Excluding that the accuracy of traffic measurement is affecte= d.
[GF]: Agree, BUM traffic is significant and it is not excluded here. It can= be monitored by using the
basic RFC 8321, since RFC 8321
applies to point-to-point unicast flows and BUM traffic. The Multipoint al= ternate marking and its
Clustering approach is valid for multipoint-to-multipoint unicast flows. I = will highlight it better in
the Introduction.


2. Could you please let me know how the out of order packet are handled. [GF]: Out of order packets happen and are handled by
reducing consequently the available counting interval. These aspects are de= scribed in Section 7. In
particular three different possible constraints are considered: clock error= between
network devices, network delay between measurement points and the misalign= ment between the marking
source routers.



3. There will be ECMP paths, how this measurement will take care of it.
[GF]: ECMP paths are point-to-multipoint unicast flows so, by definition, t= hey can be easily monitored
with this technique. I will
add a sentence on this in the Introduction or in Section 3.



4. How do we collect the data, the draft is silent of flow measurement.
[GF]: The draft aims to define especially the methodology as the extension = of RFC 8321. However,
Section 9 introduces the idea of
an Intelligent Performance Management and suggests that an SDN Orchestrato= r or a Controller can apply
this methodology since it is aware of the network topology. In addition, Se= ction 3 introduces the
generalization of the flow definition.


5. What will happen when re write rules are applied which gives an erroneou= s output isnt it.
[GF]: Yes, there is a transient time to wait once new rules are configured = and it can be determined by
the network management. I
can add a sentence on this in Section 9.



6. In delay measurement, the draft didnt explain the start of the time meas= urement, the networks


elements are not synced properly there will be a delta. Since there is no e= xplicit signalling of


timestamp. could you please explain how this is done.
[GF]: The delay measurements can be done similarly to RFC 8321. The marking= batches anchor the samples
to a particular period so
this is the time reference that can be used (each block of packets can als= o be numbered if needed). As
reported in Section 7, compared to RFC 8321, the only additional contributi= on to consider is the
misalignment between the marking source routers and, as
you said, there is a delta that reduces the available measurement interval= . I can specify in the
Section 8 that the timing aspects applies to delay measurements as well.




Regards,

Sudhin




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X-Gm-Message-State: APjAAAXRiQbf07yQdGGsBe3bwjToABadmM5s7+IxK4esUa4OzspoqJus tka+Pjohc2JdI3IcS/S545A0etQu6eFTmhrT710atg== X-Google-Smtp-Source: APXvYqwuitKNTGgokQn5uX1xQ4XvZBu3ocgmeODQ/Xch7ZvhkpVyavKIzphgR9saPaZm8mV1K07zRBe85tFOYYBcOIM= X-Received: by 2002:a25:4802:: with SMTP id v2mr14697212yba.463.1569090791088; Sat, 21 Sep 2019 11:33:11 -0700 (PDT) MIME-Version: 1.0 References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF94D0@njmtexg5.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9BA5@njmtexg5.research.att.com> In-Reply-To: <4D7F4AD313D3FC43A053B309F97543CFA0AF9BA5@njmtexg5.research.att.com> From: Matt Mathis Date: Sat, 21 Sep 2019 11:32:58 -0700 Message-ID: To: "MORTON, ALFRED C (AL)" Cc: "Ruediger.Geib@telekom.de" , "ippm@ietf.org" , "CIAVATTONE, LEN" Content-Type: multipart/alternative; boundary="00000000000039a4cb0593146bf5" Archived-At: Subject: Re: [ippm] How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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, 21 Sep 2019 18:33:17 -0000 --00000000000039a4cb0593146bf5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Yes, exactly, I am sure this is a provider's feature. I have a receiver side pcap, and it is quite a bit more complicated than I thought: - Zero losses in the entire trace. It is dynamically shaped at a bottleneck with a long queue that is pacing packets. - The initial part is really straight (looks like a hard limit) - The rate (and packet headway) smoothly wanders irregularly all over the place in the latter part of the trace, from a low of about 1 Mb/s to peaks close to the max rate. My earlier data was from BBR max_rate, so the fluctuating rate apparently has stable peaks. By smooth: it looked like a spline fit, suggesting the instantaneous packet headway was determined by a differential equation.... This behavior is not an accident, but the result of a very sophisticated controller. And we have seen other bottlenecks like it elsewhere in the US and Europe. As people may know, I do believe that shaping is the most appropriate way to deal with heavy hitters. And that we (IPPM) really need a way to characterize shaping. I do care about the asymptotic rate, and how quickly I fall out of the initial rate. Thanks, --MM-- The best way to predict the future is to create it. - Alan Kay We must not tolerate intolerance; however our response must be carefully measured: too strong would be hypocritical and risks spiraling out of control; too weak risks being mistaken for tacit approval. On Sat, Sep 21, 2019 at 8:34 AM MORTON, ALFRED C (AL) wrote: > Hi Matt, > > > > I had another thought about the 94 > 75 > 83 Mbps trace: > > This might well be a service provider=E2=80=99s feature, where > > they favor new flows with a high-rate for a short amount > > of time. I remember some ISPs offering a =E2=80=9Cspeed boost=E2=80=9D > > to load web pages fast, but settling to a lower rate for > > longer transfers. The same strategy could help reduce > > the initial buffering time for video streams, perhaps with > > different time intervals and rates. This might be implemented > > by changing the token rate, or through some other means. > > > > > > *From:* Matt Mathis [mailto:mattmathis@google.com] > *Sent:* Thursday, September 19, 2019 9:43 PM > *To:* MORTON, ALFRED C (AL) > *Cc:* Ruediger.Geib@telekom.de; ippm@ietf.org; CIAVATTONE, LEN < > lc9892@att.com> > *Subject:* Re: How should capacity measurement interact with shaping? > > > > I am actually more interested in the philosophical questions about how > this should be reported, and what should the language be about > non-stationary available capacity. One intersecting issue: BBR converge= s > on both the initial and final rate in under 2 seconds (this was a long > path, so startup took more than a second). Do users want a quick (and > relatively cheap) test that takes 2 seconds or a longer test that is more > likely to discover the token bucket? How long? If we want to call them > different names, what should they be? > > *[acm] * > > So, if your trace is revealing a bimodal form of service rates, > > then it ought to be characterized with that in mind and > > allow for two modes of operation when reporting: > > 94 initial peak Capacity, 83 sustained Capacity > > *when this behavior is demonstrated and repeatable=E2=80=9D. > > > > Thanks for more insights about BBR, too. > > Al > > > > On the pure technical issues: BBR is still quite a moving target. I hav= e > a paper in draft that will shed some light on this. It is due to be > unembargoed sometime in October. > > BBRv1 (released slightly after the cacm paper you mention) measures the > max_BW every 8 RTT. BBRv2 measures the max_BW on a sliding schedule that > loosely matches CUBIC. (In both, min_RTT is measured every 10 seconds, i= n > the absence of organic low RTT samples). BBRv2 uses additional signals > and does a much better job of avoiding overshoot at the startup. > > > > In any case the best (most stable) BBR based metric seems to be > delta(snd.una)/elapsed_time, which is the progress as seen by upper > layers. If you look at short time slices (we happen to be using 0.25 > seconds) you see a mostly crisp square wave. If you average from the > beginning of the connection to now, the peak rate happens at the moment t= he > bucket runs out of tokens, and falls towards the toke rate after that. > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > > > On Thu, Sep 19, 2019 at 3:35 PM MORTON, ALFRED C (AL) < > acm@research.att.com> wrote: > > Thanks Matt! This is an interesting trace to consider, > > and an important discussion to share with the group. > > > > When I look at the equation for BBR: > > > https://cacm.acm.org/magazines/2017/2/212428-bbr-congestion-based-congest= ion-control/fulltext > > > > > both BBR and Maximum IP-layer Capacity Metric seek the > > Max over some time interval. The window seems smaller for > > BBR: 6 to 10 RTTs, where we=E2=80=99ve been using parameters that > > result in a rate measurement once a second and take the max > > of the 10 one-second measurements. > > > > We=E2=80=99ve also evaluate several performance metrics when > > adjusting load, and that determines how high the sending > > rate will go (based on feedback from the receiver). > > > https://tools.ietf.org/html/draft-morton-ippm-capcity-metric-method-00#se= ction-4.3 > > > > > So, it seems that the MAX delivered rate for the 10 second test, we > > can all see is 94.5 Mbps. This rate was sustained for more > > than a trivial amount of time, too. But if you are concerned that this > > rate was somehow inflated by a large buffer and a large > > burst tolerance in the shaper =E2=80=93 that=E2=80=99s where the addition= al > > metrics and slightly different sending rate control > > that we described in the draft (and the slides) might help. > > > https://datatracker.ietf.org/meeting/105/materials/slides-105-ippm-metric= s-and-methods-for-ip-capacity-00 > > > > > IOW, it might well be that Max IP Capacity, measured as we designed > > and parameterized it, measures 83 Mbps for this path > > (assuming the 94.5 is the result of big overshoot at sender, and the > > fluctuating performance afterward seems to support that). > > > > When I was looking for background on BBR, I saw a paper comparing > > BBR and CUBIC during drive tests. > > http://web.cs.wpi.edu/~claypool/papers/driving-bbr/ > > > One pair of plots seemed to indicate that BBR sent lots of Bytes > > early-on, and grew the RTT pretty high before settling down > > (Figure 5, a & b). > > This looks a bit like the case you described below, > > except 94.5 Mbps is a Received Rate =E2=80=93 we don=E2=80=99t know > > what came out of the network, just what went in and filled > > a buffer before crashing down in the drive test. > > > > So, I think I did more investigation than justification > > for my answers, but I conclude the parameters like the > > individual measurement intervals and overall time interval > > from which the Max is drawn, plus the rate control algorithm > > itself, play a big role here. > > > > regards, > > Al > > > > > > *From:* Matt Mathis [mailto:mattmathis@google.com] > *Sent:* Thursday, September 19, 2019 5:18 PM > *To:* MORTON, ALFRED C (AL) ; > Ruediger.Geib@telekom.de > *Cc:* ippm@ietf.org > *Subject:* Fwd: How should capacity measurement interact with shaping? > > > > Ok, moving the thread to IPPM > > > > Some background, we (Measurement Lab) are testing a new transport (TCP) > performance measurement tool, based on BBR-TCP. I'm not ready to talk > about results yet (well ok, it looks pretty good). (BTW the BBR > algorithm just happens to resemble the algorithm described > in draft-morton-ippm-capcity-metric-method-00.) > > > > Anyhow we noticed some interesting performance features for number of ISP= s > in the US and Europe and I wanted to get some input for how these cases > should be treated. > > > > One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, > fluctuating performance ~75 Mb/s for ~1 second and then stable > performance at ~83Mb/s for the rest of the 10 second test. If I were t= o > guess this is probably a policer (shaper?) with a 1 MB token bucket and > a ~83Mb/s token rate (these numbers are not corrected for header overhead= s, > which actually matter with this tool). What is weird about it is that > different ingress interfaces to the ISP (peers or serving locations) > exhibit different parameters. > > > > Now the IPPM measurement question: Is the bulk transport capacity of > this link ~94.5 Mbit/s or ~83Mb/s? Justify your answer....? > > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > *Forwarded Conversation* > *Subject: How should capacity measurement interact with shaping?* > ------------------------ > > > > From: *Matt Mathis* > Date: Thu, Aug 15, 2019 at 8:55 AM > To: MORTON, ALFRED C (AL) > > > > We are seeing shapers with huge bucket sizes, perhaps as larger or large= r > than 100 MB. > > > > These are prohibitive to test by default, but can have a huge impact in > some common situations. E.g. downloading software updates. > > > > An unconditional pass is not good, because some buckets are small. What > counts as large enough to be ok, and what "derating" is ok? > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > ---------- > From: *MORTON, ALFRED C (AL)* > Date: Mon, Aug 19, 2019 at 5:08 AM > To: Matt Mathis > Cc: CIAVATTONE, LEN , Ruediger.Geib@telekom.de < > Ruediger.Geib@telekom.de> > > > > Hi Matt, currently cruising between Crete and Malta, > > with about 7 days of vacation remaining =E2=80=93 Adding my friend Len. > > You know R=C3=BCdiger. It appears I=E2=80=99ve forgotten how to typs in 2= weeks > > given the number of typos I=E2=80=99ve fixed so far... > > > > We=E2=80=99ve seen big buffers on a basic DOCSIS cable service (downlink = >2 sec) > > but, > > we have 1-way delay variation or RTT variation limits > > when searching for the max rate, that don=E2=80=99t many packets > > queue in the buffer > > > > we want the status messages that result in rate adjustment to return > > in a reasonable amount of time (50ms + RTT) > > > > we usually search for 10 seconds, but if we go back and test with > > a fixed rate, we can see the buffer growing if the rate is too high. > > > > There will eventually be a discussion on the thresholds we use > > in the search // load rate control algorithm. The copy of > > Y.1540 I sent you has a simple one, we moved beyond that now > > (see the slides I didn=E2=80=99t get to present at IETF). > > > > There is value in having some of this discussion on IPPM-list, > > so we get some **agenda time at IETF-106** > > > > We measure rate and performance, with some performance limits > > built-in. Pass/Fail is another step, de-rating too (made sense > > with MBM =E2=80=9Ctarget_rate=E2=80=9D). > > > > Al > > > > ---------- > From: > Date: Mon, Aug 26, 2019 at 12:05 AM > To: > Cc: , > > > > Hi Al, > > > > thanks for keeping me involved. I don=E2=80=99t have a precise answer and= doubt, > that there will be a single universal truth. > > > > If the aim is only to determine the IP bandwidth of an access, then we > aren=E2=80=99t interested in filling a buffer. Buffering events may occur= , some of > which are useful and to be expected, whereas others are not desired: > > > > - Sender shaping behavior may matter (is traffic at the source CBR or > is it bursty) > - Random collisions should be tolerated at the access whose bandwidth > is to be measured. > - Limiting packet drop due to buffer overflow is a design aim or an > important part of the algorithm, I think. > - Shared media might create bursts. I=E2=80=99m not an expert in the a= rea, but > there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in s= ome cases between a central > sender using a shared medium and the receivers connected. WiFi and may= be > other wireless equipment buffers packets also to optimize wireless res= ource > optimization. > - It might be an idea to mark some flows by ECN, once there=E2=80=99s = a guess > on a sending bitrate when to expect no or very little packet drop. Tod= ay, > this is experimental. CE marks by an ECN capable device should be expe= cted > roughly once queuing starts. > > > > Practically, the set-up should be configurable with commodity hard- and > software and all metrics should be measurable at the receiver. Burstiness > of traffic and a distinction between queuing events which are to be > expected and (undesired) queue build up are the events to be distinguishe= d. > I hope that can be done with commodity hard- and software. I at least am > not able to write down a simple metric distinguishing queues to be expect= ed > from (undesired) queue build up causing congestion. The hard- and softwar= e > to be used should be part of the solution, not part of the problem (burst= y > source traffic and timestamps with insufficient accuracy to detect queues > are what I=E2=80=99d like to avoid). > > > > I=E2=80=99d suggest to move discussion to the list. > > > > Regards, > > > > R=C3=BCdiger > > > > ---------- > From: *MORTON, ALFRED C (AL)* > Date: Thu, Sep 19, 2019 at 7:01 AM > To: Ruediger.Geib@telekom.de > Cc: CIAVATTONE, LEN , mattmathis@google.com < > mattmathis@google.com> > > > > I=E2=80=99m catching-up with this thread again, but before I reply: > > > > *** Any objection to moving this discussion to IPPM-list ?? *** > > > > @Matt =E2=80=93 this is a question to you at this point... > > > > thanks, > > Al > > > > *From:* Ruediger.Geib@telekom.de [mailto:Ruediger.Geib@telekom.de] > *Sent:* Monday, August 26, 2019 3:05 AM > *To:* MORTON, ALFRED C (AL) > *Cc:* CIAVATTONE, LEN ; mattmathis@google.com > *Subject:* AW: How should capacity measurement interact with shaping? > > > > Hi Al, > > > > thanks for keeping me involved. I don=E2=80=99t have a precise answer and= doubt, > that there will be a single universal truth. > > > > If the aim is only to determine the IP bandwidth of an access, then we > aren=E2=80=99t interested in filling a buffer. Buffering events may occur= , some of > which are useful and to be expected, whereas others are not desired: > > > > - Sender shaping behavior may matter (is traffic at the source CBR > or is it bursty) > > - Random collisions should be tolerated at the access whose > bandwidth is to be measured. > > - Limiting packet drop due to buffer overflow is a design aim or > an important part of the algorithm, I think. > > - Shared media might create bursts. I=E2=80=99m not an expert in t= he area, > but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in = some cases between a > central sender using a shared medium and the receivers connected. WiFi an= d > may be other wireless equipment buffers packets also to optimize wireless > resource optimization. > > - It might be an idea to mark some flows by ECN, once there=E2=80= =99s a > guess on a sending bitrate when to expect no or very little packet drop. > Today, this is experimental. CE marks by an ECN capable device should be > expected roughly once queuing starts. > > > > --00000000000039a4cb0593146bf5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Yes, exactly, I am sure this is a provider's feature.= =C2=A0 =C2=A0I have a receiver side pcap, and it is quite a bit more compli= cated than I thought:
- Zero losses in the entire trace.=C2=A0 It is dy= namically shaped=C2=A0at a bottleneck with a long queue that is pacing pac= kets.
- The initial=C2=A0part is really straight (looks like a ha= rd limit)
- The rate (and packet headway) smoothly wanders irregu= larly all over the place in the latter part of the trace, from a low of abo= ut 1 Mb/s to peaks close to the max rate.=C2=A0 =C2=A0My earlier data was f= rom BBR max_rate, so the fluctuating rate apparently=C2=A0has stable peaks.=

By smooth: it looked like a spline fit, suggestin= g the instantaneous=C2=A0packet headway was determined=C2=A0by a differenti= al=C2=A0equation....

This behavior is not an accid= ent, but the result of a very sophisticated controller.=C2=A0 =C2=A0And we = have seen other bottlenecks=C2=A0like it elsewhere in the US and Europe.

As people may know, I do believe that shaping is the= most appropriate way to deal with heavy hitters.=C2=A0 And that we (IPPM) = really need a way to characterize shaping.=C2=A0 I do=C2=A0care about the a= symptotic rate, and how quickly I fall out of the initial rate.
<= br clear=3D"all">
Thanks,
--MM--
The best way to predict the future i= s to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;
=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must b= e carefully measured:=C2=A0
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 too strong would be hypocritical and risks spiraling out of control;=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak risks being m= istaken for tacit approval.


On Sat, Sep 21, 2019 at 8:34 AM MORTON, ALFRED C (AL) <acm@research.att.com> wrote:

Hi Matt,

=C2=A0

I had another thought about the 94 > 75= > 83 Mbps trace:

This might well be a service provider=E2= =80=99s feature, where

they favor new flows with a high-rate for = a short amount

of time.=C2=A0 I remember some ISPs offeri= ng a =E2=80=9Cspeed boost=E2=80=9D

to load web pages fast, but settling to a = lower rate for

longer transfers. The same strategy could = help reduce

the initial buffering time for video strea= ms, perhaps with

different time intervals and rates. This m= ight be implemented

by changing the token rate, or through som= e other means.

=C2=A0

=C2=A0

From: Matt Mathis [mailto:mattmathis@google.com]
Sent: Thursday, September 19, 2019 9:43 PM
To: MORTON, ALFRED C (AL) <acm@research.att.com>
Cc: Ru= ediger.Geib@telekom.de; ippm@ietf.org; CIAVATTONE, LEN <lc9892@att.com>
Subject: Re: How should capacity measurement interact with shaping?<= u>

=C2=A0

I am actually more interested in the philosophical q= uestions about how this should be reported, and what should the language be= about non-stationary available=C2=A0capacity.=C2=A0 =C2=A0One intersecting= issue: BBR converges on both the initial and final rate in under 2 seconds (this was a long path, so startup took more than a= second).=C2=A0 =C2=A0Do users want a quick (and relatively cheap) test tha= t takes 2 seconds or a longer test that is more likely to discover the toke= n bucket?=C2=A0 How long?=C2=A0 If we want to call them different=C2=A0names, what should they be?

[acm]

So, if your trace is revealing a bimodal f= orm of service rates,

then it ought to be characterized with tha= t in mind and

allow for two modes of operation when repo= rting:

94 initial peak Capacity, 83 sustained Cap= acity

*when this behavior is demonstrated and re= peatable=E2=80=9D.

=C2=A0

Thanks for more insights about BBR, too.

Al

=C2=A0

On the pure technical issues: BBR is still quite a m= oving target.=C2=A0 =C2=A0I have a paper in draft that will shed some light= on this.=C2=A0 It is due to be unembargoed=C2=A0sometime in October.

BBRv1 (released slightly after the cacm paper you me= ntion) measures the max_BW every 8 RTT.=C2=A0 BBRv2 measures the max_BW on = a sliding schedule that loosely=C2=A0matches CUBIC.=C2=A0 (In both, min_RTT= is measured every 10 seconds, in the absence of organic low RTT samples).=C2=A0 =C2=A0BBRv2 uses additional signals and do= es a much better job of avoiding overshoot at the startup.

=C2=A0

In any case the best (most stable) BBR based metric = seems to be delta(snd.una)/elapsed_time, which is the progress=C2=A0as seen= by upper layers.=C2=A0 If you look at short time slices (we happen to be u= sing 0.25 seconds) you see a mostly crisp square wave.=C2=A0 If you average from the beginning of the connection to now, th= e peak rate happens at the moment the bucket runs out of tokens, and falls = towards the toke rate after that.


Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

=C2=A0

On Thu, Sep 19, 2019 at 3:35 PM MORTON, ALFRED C (AL= ) <acm@researc= h.att.com> wrote:

Thanks Matt!=C2=A0 This is an interesting = trace to consider,

and an important discussion to share with = the group.

=C2=A0

When I look at the equation for BBR:

https://cacm.acm.org/ma= gazines/2017/2/212428-bbr-congestion-based-congestion-control/fulltext<= /span>

=C2=A0

both BBR and Maximum IP-layer Capacity Met= ric seek the

Max over some time interval. The window se= ems smaller for

BBR: 6 to 10 RTTs, where we=E2=80=99ve bee= n using parameters that

result in a rate measurement once a second= and take the max

of the 10 one-second measurements.

=C2=A0

We=E2=80=99ve also evaluate several perfor= mance metrics when

adjusting load, and that determines how hi= gh the sending

rate will go (based on feedback from the r= eceiver).

https://tools.ietf.org/html/dr= aft-morton-ippm-capcity-metric-method-00#section-4.3

=C2=A0

So, it seems that the MAX delivered rate f= or the 10 second test, =C2=A0we

can all see is 94.5 Mbps. This rate was su= stained for more

than a trivial amount of time, too. But if= you are concerned that this

rate was somehow inflated by a large buffe= r and a large

burst tolerance in the shaper =E2=80=93 th= at=E2=80=99s where the additional

metrics and slightly different sending rat= e control

that we described in the draft (and the sl= ides) might help.

https= ://datatracker.ietf.org/meeting/105/materials/slides-105-ippm-metrics-and-m= ethods-for-ip-capacity-00

=C2=A0

IOW, it might well be that Max IP Capacity= , measured as we designed

and parameterized it, measures 83 Mbps for= this path

(assuming the 94.5 is the result of big ov= ershoot at sender, and the

fluctuating performance afterward seems to= support that).

=C2=A0

When I was looking for background on BBR, = I saw a paper comparing

BBR and CUBIC during drive tests.

http://web.cs.wpi.edu/~claypool/papers/driving-bbr/<= /u>

One pair of plots seemed to indicate that = BBR sent lots of Bytes

early-on, and grew the RTT pretty high bef= ore settling down

(Figure 5, a & b).

This looks a bit like the case you describ= ed below,

except 94.5 Mbps is a Received Rate =E2=80= =93 we don=E2=80=99t know

what came out of the network, just what we= nt in and filled

a buffer before crashing down in the drive= test.

=C2=A0

So, I think I did more investigation than = justification

for my answers, but I conclude the paramet= ers like the

individual measurement intervals and overa= ll time interval

from which the Max is drawn, plus the rate= control algorithm

itself, play a big role here.

=C2=A0

regards,

Al

=C2=A0

=C2=A0

From: Matt Mathis [mailto:mattmathis@google.com]
Sent: Thursday, September 19, 2019 5:18 PM
To: MORTON, ALFRED C (AL) <acm@research.att.com>; Ruediger.Geib= @telekom.de
Cc: ippm@ietf.org=
Subject: Fwd: How should capacity measurement interact with shaping?=

=C2=A0

Ok, moving the thread to IPPM

=C2=A0

Some background, we (Measurement=C2=A0Lab) are testi= ng a new transport (TCP) performance measurement tool, based on BBR-TCP.=C2= =A0 =C2=A0I'm not ready to talk about results yet (well ok, it looks pretty good).=C2=A0 =C2=A0 (BTW the BBR algorithm just happens to resemble= the algorithm=C2=A0described in=C2=A0draft-morton-ippm-capcity-metric-meth= od-00.)

=C2=A0

Anyhow=C2=A0we noticed some interesting performance = features for number of ISPs in the US and Europe and I wanted to get some i= nput for how these cases should be treated.

=C2=A0

One data point, a single trace saw ~94.5 Mbit/s for = ~4 seconds, fluctuating=C2=A0performance ~75 Mb/s for ~1 second and then st= able performance=C2=A0at ~83Mb/s for the rest of the 10 second test.=C2=A0 =C2=A0 If I were to guess this is probably a policer (shaper?)= with a 1 MB token bucket and a=C2=A0~83Mb/s token rate (these numbers are = not corrected for header overheads, which actually matter with this tool).= =C2=A0 What is weird about it is that different ingress interfaces to the ISP (peers or serving=C2=A0locations) exhibit different = parameters.=C2=A0=C2=A0

=C2=A0

Now the IPPM measurement question:=C2=A0 =C2=A0Is th= e bulk transport capacity of this link=C2=A0~94.5 Mbit/s or=C2=A0~83Mb/s?= =C2=A0 =C2=A0Justify your answer....?

=C2=A0

Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

Forwarded Conversa= tion
Subject: How should capacity measurement interact with shaping?
------------------------

=C2=A0

From: Matt Mathis <mattmathis@google.com>
Date: Thu, Aug 15, 2019 at 8:55 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>

=C2=A0

We are seeing shapers=C2=A0 with huge bucket sizes, = perhaps as larger or larger than 100 MB.

=C2=A0

These are prohibitive to test by default, but can ha= ve a huge impact in some common situations.=C2=A0 E.g. downloading software= updates.

=C2=A0

An unconditional pass is not good, because some buck= ets are small.=C2=A0 What counts as large enough to be ok, and what "d= erating" is ok?


Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

---------- From: MORTON, ALFRED C (AL) <acm@research.att.com>
Date: Mon, Aug 19, 2019 at 5:08 AM
To: Matt Mathis <mattmathis@google.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>, Ruediger.Geib= @telekom.de <Ruediger.Geib@telekom.de>

=C2=A0

Hi Matt, currently cruising between Crete = and Malta,

with about 7 days of vacation remaining = =E2=80=93 Adding my friend Len.

You know R=C3=BCdiger. It appears I=E2=80= =99ve forgotten how to typs in 2 weeks

given the number of typos I=E2=80=99ve fix= ed so far...

=C2=A0

We=E2=80=99ve seen big buffers on a basic = DOCSIS cable service (downlink >2 sec)

but,

=C2=A0 we have 1-way delay variation or RT= T variation limits

=C2=A0 when searching for the max rate, th= at don=E2=80=99t many packets

=C2=A0=C2=A0queue in the buffer<= /u>

=C2=A0

=C2=A0 we want the status messages that re= sult in rate adjustment to return

=C2=A0in a reasonable amount of time (50ms= + RTT)

=C2=A0

=C2=A0 we usually search for 10 seconds, b= ut if we go back and test with

=C2=A0=C2=A0a fixed rate, we can see the b= uffer growing if the rate is too high.

=C2=A0

=C2=A0 There will eventually be a discussi= on on the thresholds we use

=C2=A0 in the search // load rate control = algorithm. The copy of

=C2=A0=C2=A0Y.1540 I sent you has a simple= one, we moved beyond that now

=C2=A0 (see the slides I didn=E2=80=99t ge= t to present at IETF).

=C2=A0

=C2=A0 There is value in having some of th= is discussion on IPPM-list,

=C2=A0 so we get some *agenda time at I= ETF-106*

=C2=A0

We measure rate and performance, with some= performance limits

built-in.=C2=A0 Pass/Fail is another step,= de-rating too (made sense

with MBM =E2=80=9Ctarget_rate=E2=80=9D).

=C2=A0

Al

=C2=A0

---------- From: <Rue= diger.Geib@telekom.de>
Date: Mon, Aug 26, 2019 at 12:05 AM
To: <acm@resea= rch.att.com>
Cc: <lc9892@att.com<= /a>>, <mat= tmathis@google.com>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved. I don=E2=80=99t have a precise an= swer and doubt, that there will be a single universal truth.

=C2=A0

If the aim is only to determine the IP bandwidth of an access, th= en we aren=E2=80=99t interested in filling a buffer. Buffering events may occur, some of which are useful and to be expected, whereas oth= ers are not desired:

=C2=A0

  • Sender shapin= g behavior may matter (is traffic at the source CBR or is it bursty)=
  • Random collis= ions should be tolerated at the access whose bandwidth is to be measured.
  • Limiting pack= et drop due to buffer overflow is a design aim or an important part of the = algorithm, I think.
  • Shared media = might create bursts. I=E2=80=99m not an expert in the area, but there=E2=80= =99s an =E2=80=9Cis bandwidth available=E2=80=9D check in some cases betwee= n a central sender using a shared medium and the receivers connected. WiFi and may be other wireless equipment buffers packets also to optimize = wireless resource optimization.
  • It might be a= n idea to mark some flows by ECN, once there=E2=80=99s a guess on a sending= bitrate when to expect no or very little packet drop. Today, this is exper= imental. CE marks by an ECN capable device should be expected roughly once queuing starts.
    • <= /ul>

    =C2=A0

    Practically, the set-up should be configurable with commodity har= d- and software and all metrics should be measurable at the receiver. Burstiness of traffic and a distinction between queuing e= vents which are to be expected and (undesired) queue build up are the event= s to be distinguished. I hope that can be done with commodity hard- and sof= tware. I at least am not able to write down a simple metric distinguishing queues to be expected from (unde= sired) queue build up causing congestion. The hard- and software to be used= should be part of the solution, not part of the problem (bursty source tra= ffic and timestamps with insufficient accuracy to detect queues are what I=E2=80=99d like to avoid).

    =C2=A0

    I=E2=80=99d suggest to move discussion to the list.

    =C2=A0

    Regards,

    =C2=A0

    R=C3=BCdiger

=C2=A0

---------- From: MORTON, ALFRED C (AL) <acm@research.att.com>
Date: Thu, Sep 19, 2019 at 7:01 AM
To: Ruediger.= Geib@telekom.de <Ruediger.Geib@telekom.de>
Cc: CIAVATTONE, LEN <lc9892@att.com>, mattmathis@googl= e.com <ma= ttmathis@google.com>

=C2=A0

I=E2=80=99m catching-up with this thread a= gain, but before I reply:

=C2=A0

*** Any objection to moving this discussio= n to IPPM-list ?? ***

=C2=A0

@Matt =E2=80=93 this is a question to you = at this point...

=C2=A0

thanks,

Al

=C2=A0

From: Ruediger.Geib= @telekom.de [mailto:Ruediger.Geib@telekom.de]
Sent: Monday, August 26, 2019 3:05 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>; mattmathis@googl= e.com
Subject: AW: How should capacity measurement interact with shaping?<= /span>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved. I don=E2=80=99t have a precise an= swer and doubt, that there will be a single universal truth.

=C2=A0

If the aim is only to determine the IP bandwidth of an access, th= en we aren=E2=80=99t interested in filling a buffer. Buffering events may occur, some of which are useful and to be expected, whereas oth= ers are not desired:

=C2=A0

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Sender= shaping behavior may matter (is traffic at the source CBR or is it bursty)=

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Random= collisions should be tolerated at the access whose bandwidth is to be meas= ured.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Limiti= ng packet drop due to buffer overflow is a design aim or an important part = of the algorithm, I think.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Shared= media might create bursts. I=E2=80=99m not an expert in the area, but ther= e=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in some cases= between a central sender using a shared medium and the receivers connected. WiFi and may be other wireless equipment buffers packets also t= o optimize wireless resource optimization.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 It mig= ht be an idea to mark some flows by ECN, once there=E2=80=99s a guess on a = sending bitrate when to expect no or very little packet drop. Today, this i= s experimental. CE marks by an ECN capable device should be expected roughly once queuing starts.

=C2=A0

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<9719b8fde9d44090baf38acd9ae85d0d@huawei.com> References: <334dd219fc554cec85ec5258cc4c9de9@huawei.com> <1568883213.S.19722.5151.f5-147-237.1569049240.23926@webmail.rediffmail.com> In-Reply-To: <1568883213.S.19722.5151.f5-147-237.1569049240.23926@webmail.rediffmail.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.220.135.18] Content-Type: multipart/alternative; boundary="_000_9719b8fde9d44090baf38acd9ae85d0dhuaweicom_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [ippm] https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-02.txt X-BeenThere: ippm@ietf.org 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: Mon, 23 Sep 2019 07:30:13 -0000 --_000_9719b8fde9d44090baf38acd9ae85d0dhuaweicom_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 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s=mail; t=1569227759; bh=7irV1AXv5GxYLiMsy3wn+OihQxM5M7XzflX4GWCh00I=; h=MIME-Version:From:Date:Message-ID:Subject:To:Content-Type; b=RAqOfMqqbmV9w04MIb+i+yNWWQeNk/FJDkHO4ZkC/M7ORtkF5wI62QGy6Xq/S3JqX NGmfF4INH4/csYtaU/atzOn0jh+SeBfUJ8fBV7E/u1JWR42fG8elSEHH6Q8IPCx64F N0uRcuT+fdmsZVTml4eOOjMUIP9+Nf+akhUuclxc= Received: (qmail 24605 invoked by uid 510); 23 Sep 2019 08:35:59 -0000 x-m-msg: asd54ad564ad7aa6sd5as6d5; a6da7d6asas6dasd77; 5dad65ad5sd; X-OUT-VDRT-SpamState: 0\LEGIT X-OUT-VDRT-SpamScore: 0 X-OUT-VDRT-SpamCause: gggruggvucftvghtrhhoucdtuddrgedufedrvdekgddthecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucdftffgfffkhffhpdfqfgfvfdenuceurghilhhouhhtmecufedttdenucenucfjughrpeffggfvkfgjshfuhfgtsegrtderredttdejnecuhfhrohhmpedfufhuughhihhnfdcuoehsuhguhhhinhhjrggtohgssehrvgguihhffhhmrghilhdrtghomheqnecuffhomhgrihhnpehivghtfhdrohhrghenucfkphepudduiedrudeljedrudekgedrudehnecurfgrrhgrmhepmhhouggvpehsmhhtphhouhhtnecuvehluhhsthgvrhfuihiivgeptd X-Remote-IP: 116.197.184.15 X-REDF-OSEN: sudhinjacob@rediffmail.com Date: 23 Sep 2019 08:35:59 -0000 MIME-Version: 1.0 To: Received: from unknown 116.197.184.15 by rediffmail.com via HTTP; 23 Sep 2019 08:35:59 -0000 X-Senderscore: D=0&S=0 Message-ID: <1569223812.S.19140.25959.f4-234-118.1569227759.24472@webmail.rediffmail.com> In-Reply-To: <9719b8fde9d44090baf38acd9ae85d0d@huawei.com> Sender: sudhinjacob@rediffmail.com From: "Sudhin" Cc: Content-Type: multipart/alternative; boundary="=_68ee17e16b338788587d4486de952e83" Archived-At: Subject: Re: [ippm] =?utf-8?q?https=3A//tools=2Eietf=2Eorg/id/draft-ietf-ippm?= =?utf-8?q?-multipoint-alt-mark-02=2Etxt?= X-BeenThere: ippm@ietf.org 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: Mon, 23 Sep 2019 08:36:18 -0000 --=_68ee17e16b338788587d4486de952e83 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="UTF-8" Hi Giuseppe, Kindly find the answer inline. Regards, Sudhin On Mon, 23 Sep 2019 13:00:12 +0530 Giuseppe Fioccola wrote > Hi Sudhin, No problem and thank you for posting our exchange. Please let me know if this clarify and if you have additional comments. Best Regards, Giuseppe From: sudhinjacob@rediffmail.com [mailto:sudhinjacob@rediffmail.com] Sent: Saturday, September 21, 2019 9:01 AM To: Giuseppe Fioccola Cc: ippm@ietf.org Subject: Re: https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-02.txt Hi Giuseppe, Let me thank you for the reply. Let me go through it and I will get back. Regards, Sudhin On Thu, 19 Sep 2019 14:23:33 +0530 Giuseppe Fioccola wrote > Hi Sudhin, Thank you for your very useful review. You can find my answers inline tagged as [GF]. Please let me know if this clarify. If yes, you may want to publish your questions to the IPPM mailing list. Regards, Giuseppe From: sudhinjacob@rediffmail.com [mailto:sudhinjacob@rediffmail.com] Sent: Monday, September 16, 2019 11:04 AM To: Giuseppe Fioccola Subject: REG: https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-02.txt Hi Giuseppe, I had gone through the draft. Could you please clarify the following. 1. The BUM traffic is very significant in the network, could you please let me know the reason for excluding it. Excluding that the accuracy of traffic measurement is affected. [GF]: Agree, BUM traffic is significant and it is not excluded here. It can be monitored by using the basic RFC 8321, since RFC 8321 applies to point-to-point unicast flows and BUM traffic. The Multipoint alternate marking and its Clustering approach is valid for multipoint-to-multipoint unicast flows. I will highlight it better in the Introduction. Sudhin>>>>>>>>> yes it would be better, BUM traffic measurement is very much needed. 2. Could you please let me know how the out of order packet are handled. [GF]: Out of order packets happen and are handled by reducing consequently the available counting interval. These aspects are described in Section 7. In particular three different possible constraints are considered: clock error between network devices, network delay between measurement points and the misalignment between the marking source routers. Sudhin>>>>>> since there is no in band mechanism, how to know the when the flow started at router PE1 and when it reached PE2, there is no time stamp field. How to calculate the delta. 3. There will be ECMP paths, how this measurement will take care of it. [GF]: ECMP paths are point-to-multipoint unicast flows so, by definition, they can be easily monitored with this technique. I will add a sentence on this in the Introduction or in Section 3. Sudhin>>>>>> Sure Kindly address that 4. How do we collect the data, the draft is silent of flow measurement. [GF]: The draft aims to define especially the methodology as the extension of RFC 8321. However, Section 9 introduces the idea of an Intelligent Performance Management and suggests that an SDN Orchestrator or a Controller can apply this methodology since it is aware of the network topology. In addition, Section 3 introduces the generalization of the flow definition. Sudhin>>> Color details are not mentioned. 5. What will happen when re write rules are applied which gives an erroneous output isnt it. [GF]: Yes, there is a transient time to wait once new rules are configured and it can be determined by the network management. I can add a sentence on this in Section 9. Sudhin>> ok 6. In delay measurement, the draft didnt explain the start of the time measurement, the networks elements are not synced properly there will be a delta. Since there is no explicit signalling of timestamp. could you please explain how this is done. [GF]: The delay measurements can be done similarly to RFC 8321. The marking batches anchor the samples to a particular period so this is the time reference that can be used (each block of packets can also be numbered if needed). As reported in Section 7, compared to RFC 8321, the only additional contribution to consider is the misalignment between the marking source routers and, as you said, there is a delta that reduces the available measurement interval. I can specify in the Section 8 that the timing aspects applies to delay measurements as well. Sudhin>>>>>> please since there is no timestamp counter, it would be difficult to measure delay and delay variations. Regards, Sudhin --=_68ee17e16b338788587d4486de952e83 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="UTF-8" Hi Giuseppe,

Kindly find the answer inline.

Regards,
Sudhin

On Mon, 23 Sep 2019 13:00:12 +0530 Giuseppe Fioccola wrote
>







Hi Sudhin,
No problem and thank you for posting our exchange.
Please let me know if this clarify and if you have additional comments.

Best Regards,

Giuseppe

From: sudhinjacob@rediffmail.com [mailto:sudhinjacob@rediffmail.com]


Sent: Saturday, September 21, 2019 9:01 AM

To: Giuseppe Fioccola

Cc: ippm@ietf.org

Subject: Re: https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-= 02.txt

Hi Giuseppe,



Let me thank you for the reply. Let me go through it and I will get back.


Regards,

Sudhin



On Thu, 19 Sep 2019 14:23:33 +0530 Giuseppe Fioccola wrote

>















Hi Sudhin,

Thank you for your very useful review. You can find my answers inline tagge= d as [GF].

Please let me know if this clarify.

If yes, you may want to publish your questions to the IPPM mailing list.


Regards,



Giuseppe



From: sudhinjacob@rediffmail.com [mailto:sudhinjacob@rediffmail.com]





Sent: Monday, September 16, 2019 11:04 AM



To: Giuseppe Fioccola



Subject: REG:
https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-02.txt



Hi Giuseppe,







I had gone through the draft. Could you please clarify the following.











1. The BUM traffic is very significant in the network, could you please let= me know the reason for





excluding it. Excluding that the accuracy of traffic measurement is affecte= d.

[GF]: Agree, BUM traffic is significant and it is not excluded here. It can= be monitored by using the


basic RFC 8321, since RFC 8321

applies to point-to-point unicast flows and BUM traffic. The Multipoint alt= ernate marking and its


Clustering approach is valid for multipoint-to-multipoint unicast flows. I = will highlight it better in


the Introduction.


Sudhin>>>>>>>>> yes it would be better, BUM traffic measurement is very muc= h needed.


2. Could you please let me know how the out of order packet are handled.
[GF]: Out of order packets happen and are handled by

reducing consequently the available counting interval. These aspects are de= scribed in Section 7. In


particular three different possible constraints are considered: clock error= between

network devices, network delay between measurement points and the misalignm= ent between the marking


source routers.


Sudhin>>>>>> since there is no in band mechanism, how to know the when the = flow started at router PE1
and when it reached PE2, there is no time stamp field. How to calculate the= delta.




3. There will be ECMP paths, how this measurement will take care of it.

[GF]: ECMP paths are point-to-multipoint unicast flows so, by definition, t= hey can be easily monitored


with this technique. I will

add a sentence on this in the Introduction or in Section 3.

Sudhin>>>>>> Sure Kindly address that







4. How do we collect the data, the draft is silent of flow measurement.

[GF]: The draft aims to define especially the methodology as the extension = of RFC 8321. However,


Section 9 introduces the idea of

an Intelligent Performance Management and suggests that an SDN Orchestrator= or a Controller can apply


this methodology since it is aware of the network topology. In addition, Se= ction 3 introduces the


generalization of the flow definition.


Sudhin>>> Color details are not mentioned.


5. What will happen when re write rules are applied which gives an erroneou= s output isnt it.

[GF]: Yes, there is a transient time to wait once new rules are configured = and it can be determined by


the network management. I

can add a sentence on this in Section 9.



Sudhin>> ok



6. In delay measurement, the draft didnt explain the start of the time meas= urement, the networks





elements are not synced properly there will be a delta. Since there is no e= xplicit signalling of





timestamp. could you please explain how this is done.

[GF]: The delay measurements can be done similarly to RFC 8321. The marking= batches anchor the samples


to a particular period so

this is the time reference that can be used (each block of packets can also= be numbered if needed). As


reported in Section 7, compared to RFC 8321, the only additional contributi= on to consider is the


misalignment between the marking source routers and, as

you said, there is a delta that reduces the available measurement interval.= I can specify in the


Section 8 that the timing aspects applies to delay measurements as well.

Sudhin>>>>>> please since there is no timestamp counter, it would be diffic= ult to measure delay and
delay variations.








Regards,



Sudhin












--=_68ee17e16b338788587d4486de952e83-- From nobody Mon Sep 23 02:45:21 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A4C73120220 for ; Mon, 23 Sep 2019 02:45:19 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-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 nRa_7ym2by5c for ; Mon, 23 Sep 2019 02:45:16 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (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 BE34F12002F for ; Mon, 23 Sep 2019 02:45:15 -0700 (PDT) Received: from lhreml707-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 426D1B5C9E6F8B5F65D5; Mon, 23 Sep 2019 10:45:14 +0100 (IST) Received: from fraeml720-chm.china.huawei.com (10.206.15.16) by lhreml707-cah.china.huawei.com (10.201.108.48) with Microsoft SMTP Server (TLS) id 14.3.408.0; Mon, 23 Sep 2019 10:45:13 +0100 Received: from fraeml714-chm.china.huawei.com (10.206.15.33) by fraeml720-chm.china.huawei.com (10.206.15.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Mon, 23 Sep 2019 11:45:13 +0200 Received: from fraeml714-chm.china.huawei.com ([10.206.15.33]) by fraeml714-chm.china.huawei.com ([10.206.15.33]) with mapi id 15.01.1713.004; Mon, 23 Sep 2019 11:45:13 +0200 From: Giuseppe Fioccola To: "sudhinjacob@rediffmail.com" CC: "ippm@ietf.org" Thread-Topic: https://tools.ietf.org/id/draft-ietf-ippm-multipoint-alt-mark-02.txt Thread-Index: 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USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=google.com 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 lu8hZT5WWvFl for ; Mon, 23 Sep 2019 11:36:19 -0700 (PDT) Received: from mail-yb1-xb31.google.com (mail-yb1-xb31.google.com [IPv6:2607:f8b0:4864:20::b31]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BA5A1120020 for ; Mon, 23 Sep 2019 11:36:18 -0700 (PDT) Received: by mail-yb1-xb31.google.com with SMTP id f1so5676637ybq.11 for ; Mon, 23 Sep 2019 11:36:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=WvJzVbksanox10K0g8pYUJlibX+DNhHjQDCgqees5M4=; 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APjAAAWJ5eKtvhUpMQAspYNM/XtYrZPa5xaK/3rshx5SMYzi8goO6u9J FiGe+Ajx6614YgM8yHXClmSyS5LeswuXSa7dFZVujQ== X-Google-Smtp-Source: APXvYqxymz+kmr7pt59UO+O4U3KSOLHLO0z6RICnzz+l4Xb15h6Hus0mYhDuoMJul3tbT4G4vvLg3GKTb4ZPxeH/qIA= X-Received: by 2002:a25:cfce:: with SMTP id f197mr518039ybg.51.1569263777347; Mon, 23 Sep 2019 11:36:17 -0700 (PDT) MIME-Version: 1.0 References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> In-Reply-To: From: Matt Mathis Date: Mon, 23 Sep 2019 11:36:05 -0700 Message-ID: To: Ruediger.Geib@telekom.de Cc: "ippm@ietf.org" , "MORTON, ALFRED C (AL)" Content-Type: multipart/alternative; boundary="00000000000002901805933cb2bf" Archived-At: Subject: Re: [ippm] How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Mon, 23 Sep 2019 18:36:23 -0000 --00000000000002901805933cb2bf Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable This was actually DOCSIS. I am guessing that the shaping is done at the CMTS, based on load signals from elsewhere in the network, because the behaviors vary depending on where the sender is located. This has all sorts of interesting implications from a measurement perspective. For one thing, it is potentially "below the horizon" for many current techniques. Thanks, --MM-- The best way to predict the future is to create it. - Alan Kay We must not tolerate intolerance; however our response must be carefully measured: too strong would be hypocritical and risks spiraling out of control; too weak risks being mistaken for tacit approval. On Mon, Sep 23, 2019 at 1:19 AM wrote: > Hi Matt, > > > > Thanks. My expertise is more with fixed network access. I don=E2=80=99t k= now how > access bandwidth is shared between LTE flows at a mobile access. > > > > On the fixed network side, I=E2=80=99d expect a policy control point to b= e > connected to some access line concentrator (be it optical, or copper base= d > =E2=80=93 coax I can=E2=80=99t tell). To my understanding the configurati= ons having an > impact at the fixed access are: > > - The access shaper rate (settable) > - The access shaper burst size (likely a default value, depending on > phys. line card bandwidth) > - The queue depth (settable) > - AQM parameters (settable to some extent, if deployed) > > > > A burst which is below or equal to shaper burst size with a temporal > pacing allowing to the shaper to recover for new tokens will likely see > line speed at that bottleneck. That should hold in general. > > > > The shaper kicks in, if more than default shaper burst size packets arriv= e > within the given time frame. Then the queue-limit has an impact, if more > than access shaper rate packets arrive. If the latency added by the > building queue starts to control the measurement flow rate fast enough, > loss should be avoided. But then you should be able to measure the shaper > rate, I=E2=80=99d expect. > > > > While I doubt that this fits to what you=E2=80=99ve observed, it may stil= l help to > design a test which either measures available bandwidth or access bandwid= th > in the presence of a shaper: > > - An initial burst may pass a shaper at line speed > - A measurement sending up to shaper rate CBR spaced packets which > consists of more than =E2=80=9Cdefault shaper burst size=E2=80=9D pack= ets should see no > added delay and be forwared by shaper rate (it would of course pass wi= th up > to =E2=80=9Cdefault shaper burst size=E2=80=9D packets at that rate to= o, but then the rate > measurement isn=E2=80=99t sustainable, if enough tokens are added betw= een separate > measurement streams) . > - If the CBR spaced measurement flow sends more than default shaper > burst size packets with more than shaper rate, then a queue should bui= ld at > the shaper. > > > > You mentioned a token bucket of 1 MB. I=E2=80=99d expect the shaper defau= lt burst > size to depend on the phys. line card bandwidth of the interface, where > this shaper is configured. I=E2=80=99m not sure, whether to expect a sing= le > constant value for different implementations. I=E2=80=99d like to describ= e the > default shaper bandwidth by a strawman =E2=80=9C1ms@phys-interface-bandwi= dth=E2=80=9D > token bucket. Interfaces may be 1GE, 10GE or 100GE. I=E2=80=99d however n= ot be > surprised, if different generations of linecards from the same vendor > support different values for the same physical port bandwidth, and > different vendors may have different design philosophies. > > > > Regards, > > > > Ruediger > > > > > > > > *Von:* Matt Mathis > *Gesendet:* Donnerstag, 19. September 2019 23:18 > *An:* ALFRED C (AL) ; Geib, R=C3=BCdiger < > Ruediger.Geib@telekom.de> > *Cc:* ippm@ietf.org > *Betreff:* Fwd: How should capacity measurement interact with shaping? > > > > Ok, moving the thread to IPPM > > > > Some background, we (Measurement Lab) are testing a new transport (TCP) > performance measurement tool, based on BBR-TCP. I'm not ready to talk > about results yet (well ok, it looks pretty good). (BTW the BBR > algorithm just happens to resemble the algorithm described > in draft-morton-ippm-capcity-metric-method-00.) > > > > Anyhow we noticed some interesting performance features for number of ISP= s > in the US and Europe and I wanted to get some input for how these cases > should be treated. > > > > One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, > fluctuating performance ~75 Mb/s for ~1 second and then stable > performance at ~83Mb/s for the rest of the 10 second test. If I were t= o > guess this is probably a policer (shaper?) with a 1 MB token bucket and > a ~83Mb/s token rate (these numbers are not corrected for header overhead= s, > which actually matter with this tool). What is weird about it is that > different ingress interfaces to the ISP (peers or serving locations) > exhibit different parameters. > > > > Now the IPPM measurement question: Is the bulk transport capacity of > this link ~94.5 Mbit/s or ~83Mb/s? Justify your answer....? > > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > *Forwarded Conversation* > *Subject: How should capacity measurement interact with shaping?* > ------------------------ > > > > From: *Matt Mathis* > Date: Thu, Aug 15, 2019 at 8:55 AM > To: MORTON, ALFRED C (AL) > > > > We are seeing shapers with huge bucket sizes, perhaps as larger or large= r > than 100 MB. > > > > These are prohibitive to test by default, but can have a huge impact in > some common situations. E.g. downloading software updates. > > > > An unconditional pass is not good, because some buckets are small. What > counts as large enough to be ok, and what "derating" is ok? > > > Thanks, > > --MM-- > The best way to predict the future is to create it. - Alan Kay > > We must not tolerate intolerance; > > however our response must be carefully measured: > > too strong would be hypocritical and risks spiraling out of > control; > > too weak risks being mistaken for tacit approval. > > > > ---------- > From: *MORTON, ALFRED C (AL)* > Date: Mon, Aug 19, 2019 at 5:08 AM > To: Matt Mathis > Cc: CIAVATTONE, LEN , Ruediger.Geib@telekom.de < > Ruediger.Geib@telekom.de> > > > > Hi Matt, currently cruising between Crete and Malta, > > with about 7 days of vacation remaining =E2=80=93 Adding my friend Len. > > You know R=C3=BCdiger. It appears I=E2=80=99ve forgotten how to typs in 2= weeks > > given the number of typos I=E2=80=99ve fixed so far... > > > > We=E2=80=99ve seen big buffers on a basic DOCSIS cable service (downlink = >2 sec) > > but, > > we have 1-way delay variation or RTT variation limits > > when searching for the max rate, that don=E2=80=99t many packets > > queue in the buffer > > > > we want the status messages that result in rate adjustment to return > > in a reasonable amount of time (50ms + RTT) > > > > we usually search for 10 seconds, but if we go back and test with > > a fixed rate, we can see the buffer growing if the rate is too high. > > > > There will eventually be a discussion on the thresholds we use > > in the search // load rate control algorithm. The copy of > > Y.1540 I sent you has a simple one, we moved beyond that now > > (see the slides I didn=E2=80=99t get to present at IETF). > > > > There is value in having some of this discussion on IPPM-list, > > so we get some **agenda time at IETF-106** > > > > We measure rate and performance, with some performance limits > > built-in. Pass/Fail is another step, de-rating too (made sense > > with MBM =E2=80=9Ctarget_rate=E2=80=9D). > > > > Al > > > > ---------- > From: > Date: Mon, Aug 26, 2019 at 12:05 AM > To: > Cc: , > > > > Hi Al, > > > > thanks for keeping me involved. I don=E2=80=99t have a precise answer and= doubt, > that there will be a single universal truth. > > > > If the aim is only to determine the IP bandwidth of an access, then we > aren=E2=80=99t interested in filling a buffer. Buffering events may occur= , some of > which are useful and to be expected, whereas others are not desired: > > > > - Sender shaping behavior may matter (is traffic at the source CBR or > is it bursty) > - Random collisions should be tolerated at the access whose bandwidth > is to be measured. > - Limiting packet drop due to buffer overflow is a design aim or an > important part of the algorithm, I think. > - Shared media might create bursts. I=E2=80=99m not an expert in the a= rea, but > there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in s= ome cases between a central > sender using a shared medium and the receivers connected. WiFi and may= be > other wireless equipment buffers packets also to optimize wireless res= ource > optimization. > - It might be an idea to mark some flows by ECN, once there=E2=80=99s = a guess > on a sending bitrate when to expect no or very little packet drop. Tod= ay, > this is experimental. CE marks by an ECN capable device should be expe= cted > roughly once queuing starts. > > > > Practically, the set-up should be configurable with commodity hard- and > software and all metrics should be measurable at the receiver. Burstiness > of traffic and a distinction between queuing events which are to be > expected and (undesired) queue build up are the events to be distinguishe= d. > I hope that can be done with commodity hard- and software. I at least am > not able to write down a simple metric distinguishing queues to be expect= ed > from (undesired) queue build up causing congestion. The hard- and softwar= e > to be used should be part of the solution, not part of the problem (burst= y > source traffic and timestamps with insufficient accuracy to detect queues > are what I=E2=80=99d like to avoid). > > > > I=E2=80=99d suggest to move discussion to the list. > > > > Regards, > > > > R=C3=BCdiger > > > > ---------- > From: *MORTON, ALFRED C (AL)* > Date: Thu, Sep 19, 2019 at 7:01 AM > To: Ruediger.Geib@telekom.de > Cc: CIAVATTONE, LEN , mattmathis@google.com < > mattmathis@google.com> > > > > I=E2=80=99m catching-up with this thread again, but before I reply: > > > > *** Any objection to moving this discussion to IPPM-list ?? *** > > > > @Matt =E2=80=93 this is a question to you at this point... > > > > thanks, > > Al > > > > *From:* Ruediger.Geib@telekom.de [mailto:Ruediger.Geib@telekom.de] > *Sent:* Monday, August 26, 2019 3:05 AM > *To:* MORTON, ALFRED C (AL) > *Cc:* CIAVATTONE, LEN ; mattmathis@google.com > *Subject:* AW: How should capacity measurement interact with shaping? > > > > Hi Al, > > > > thanks for keeping me involved. I don=E2=80=99t have a precise answer and= doubt, > that there will be a single universal truth. > > > > If the aim is only to determine the IP bandwidth of an access, then we > aren=E2=80=99t interested in filling a buffer. Buffering events may occur= , some of > which are useful and to be expected, whereas others are not desired: > > > > - Sender shaping behavior may matter (is traffic at the source CBR > or is it bursty) > > - Random collisions should be tolerated at the access whose > bandwidth is to be measured. > > - Limiting packet drop due to buffer overflow is a design aim or > an important part of the algorithm, I think. > > - Shared media might create bursts. I=E2=80=99m not an expert in t= he area, > but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D check in = some cases between a > central sender using a shared medium and the receivers connected. WiFi an= d > may be other wireless equipment buffers packets also to optimize wireless > resource optimization. > > - It might be an idea to mark some flows by ECN, once there=E2=80= =99s a > guess on a sending bitrate when to expect no or very little packet drop. > Today, this is experimental. CE marks by an ECN capable device should be > expected roughly once queuing starts. > > > --00000000000002901805933cb2bf Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
This was actually DOCSIS.=C2=A0 I am guessing that the sha= ping is done at the CMTS, based on load signals from elsewhere in the netwo= rk, because the behaviors vary depending on where the sender is located.=C2= =A0 =C2=A0This has all sorts of interesting=C2=A0implications from a measur= ement perspective.

For one thing, it is potentially &quo= t;below the horizon" for many current techniques.

=
Thanks,
--MM--
The best way to predict the future is to create= it. =C2=A0- Alan Kay

We must not tolerate intolerance;
=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must be carefully= measured:=C2=A0
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too st= rong would be hypocritical and risks spiraling out of control;
= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak risks being mistaken for= tacit approval.

<= /div>
O= n Mon, Sep 23, 2019 at 1:19 AM <Ruediger.Geib@telekom.de> wrote:

Hi Matt,

=C2=A0

Thanks. My expertise is more wi= th fixed network access. I don=E2=80=99t know how access bandwidth is share= d between LTE flows at a mobile access.

=C2=A0

On the fixed network side, I=E2= =80=99d expect a policy control point to be connected to some access line c= oncentrator (be it optical, or copper based =E2=80=93 coax I can=E2=80=99t = tell). To my understanding the configurations having an impact at the fixed access are:=

  • The access shaper rate (settable)<= /u>
  • The access shaper burst size = (likely a default value, depending on phys. line card bandwidth)<= /u>
  • The queue depth (settable)=
  • AQM parameters (setta= ble to some extent, if deployed)

=C2=A0

A burst which is below or equal= to shaper burst size with a temporal pacing allowing to the shaper to reco= ver for new tokens will likely see line speed at that bottleneck. That shou= ld hold in general.

=C2=A0

The shaper kicks in, if more th= an default shaper burst size packets arrive within the given time frame. Th= en the queue-limit has an impact, if more than access shaper rate packets a= rrive. If the latency added by the building queue starts to control the measureme= nt flow rate fast enough, loss should be avoided. But then you should be ab= le to measure the shaper rate, I=E2=80=99d expect.

=C2=A0

While I doubt that this fits to= what you=E2=80=99ve observed, it may still help to design a test which eit= her measures available bandwidth or access bandwidth in the presence of a s= haper:

  • An initial burst may pass a shaper at line s= peed
  • A measurement = sending up to shaper rate CBR spaced packets which consists of more than = =E2=80=9Cdefault shaper burst size=E2=80=9D packets =C2=A0should see no added delay and be forwared by shaper rate (it would of course pass= with up to =E2=80=9Cdefault shaper burst size=E2=80=9D packets at that rat= e too, but then the rate measurement isn=E2=80=99t sustainable, if enough t= okens are added between separate measurement streams) .
  • If the CBR spaced measurement flow sen= ds more than default shaper burst size packets with more than shaper rate, = then a queue should build at the shaper.

=C2=A0

You mentioned a token bucket of= 1 MB. I=E2=80=99d expect the shaper default burst size to depend on the ph= ys. line card bandwidth of the interface, where this shaper is configured. = I=E2=80=99m not sure, whether to expect a single constant value for different implementations. I= =E2=80=99d like to describe the default shaper bandwidth by a strawman =E2= =80=9C1ms@phys-interface-bandwidth=E2=80=9D token bucket. Interfaces may be= 1GE, 10GE or 100GE. I=E2=80=99d however not be surprised, if different generations of linecards from the same vendor support different values for= the same physical port bandwidth, and different vendors may have different= design philosophies.

=C2=A0

Regards,

=C2=A0

Ruediger

=C2=A0

=C2=A0

=C2=A0

Von: Matt Mathis <mattmathis@google.com>
Gesendet: Donnerstag, 19. September 2019 23:18
An: ALFRED C (AL) <acm@research.att.com>; Geib, R=C3=BCdiger <Ruediger.Geib@telekom.d= e>
Cc: ippm@ietf.org=
Betreff: Fwd: How should capacity measurement interact with shaping?=

=C2=A0

Ok, moving the thread to IPPM

=C2=A0

Some background, we (Measurement=C2=A0Lab) are testi= ng a new transport (TCP) performance measurement tool, based on BBR-TCP.=C2= =A0 =C2=A0I'm not ready to talk about results yet (well ok, it looks pr= etty good).=C2=A0 =C2=A0 (BTW the BBR algorithm just happens to resemble the algorithm=C2=A0described in=C2=A0draft-morton-ippm-capcity-me= tric-method-00.)

=C2=A0

Anyhow=C2=A0we noticed some interesting performance = features for number of ISPs in the US and Europe and I wanted to get some i= nput for how these cases should be treated.

=C2=A0

One data point, a single trace saw ~94.5 Mbit/s for = ~4 seconds, fluctuating=C2=A0performance ~75 Mb/s for ~1 second and then st= able performance=C2=A0at ~83Mb/s for the rest of the 10 second test.=C2=A0 = =C2=A0 If I were to guess this is probably a policer (shaper?) with a 1 MB token bucket and a=C2=A0~83Mb/s token rate (these numbers are = not corrected for header overheads, which actually matter with this tool).= =C2=A0 What is weird about it is that different ingress interfaces to the I= SP (peers or serving=C2=A0locations) exhibit different parameters.=C2=A0=C2=A0

=C2=A0

Now the IPPM measurement question:=C2=A0 =C2=A0Is th= e bulk transport capacity of this link=C2=A0~94.5 Mbit/s or=C2=A0~83Mb/s?= =C2=A0 =C2=A0Justify your answer....?

=C2=A0

Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

Forwarded Conversa= tion
Subject: How should capacity measurement interact with shaping?
------------------------

=C2=A0

From: Matt Mathis= <mattmathis@= google.com>
Date: Thu, Aug 15, 2019 at 8:55 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>

=C2=A0

We are seeing shapers=C2=A0 with huge bucket sizes, = perhaps as larger or larger than 100 MB.

=C2=A0

These are prohibitive to test by default, but can ha= ve a huge impact in some common situations.=C2=A0 E.g. downloading software= updates.

=C2=A0

An unconditional pass is not good, because some buck= ets are small.=C2=A0 What counts as large enough to be ok, and what "d= erating" is ok?


Thanks,

--MM--
The best way to predict the future is to create it. =C2=A0- Alan Kay

We must not tolerate intolerance;

=C2=A0 =C2=A0 =C2=A0 =C2=A0however our response must= be carefully measured:=C2=A0

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too strong= would be hypocritical and risks spiraling out of control;

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 too weak r= isks being mistaken for tacit approval.

=C2=A0

---------- From: MORTON, ALFRED= C (AL) <acm@research.att.com>
Date: Mon, Aug 19, 2019 at 5:08 AM
To: Matt Mathis <mattmathis@google.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>, Ruediger.Geib@telekom.de <Ruediger.Geib@telekom.de>

=C2=A0

Hi Matt, currently cruising between Crete and Ma= lta,

with about 7 days of vacation remaining =E2=80= =93 Adding my friend Len.<= /p>

You know R=C3=BCdiger. It appears I=E2=80=99ve f= orgotten how to typs in 2 weeks

given the number of typos I=E2=80=99ve fixed so = far...

=C2=A0=

We=E2=80=99ve seen big buffers on a basic DOCSIS= cable service (downlink >2 sec)

but,

=C2=A0 we have 1-way delay variation or RTT vari= ation limits

=C2=A0 when searching for the max rate, that don= =E2=80=99t many packets

=C2=A0=C2=A0queue in the buffer

=C2=A0=

=C2=A0 we want the status messages that result i= n rate adjustment to return

=C2=A0in a reasonable amount of time (50ms + RTT= )

=C2=A0=

=C2=A0 we usually search for 10 seconds, but if = we go back and test with

=C2=A0=C2=A0a fixed rate, we can see the buffer = growing if the rate is too high.<= /span>

=C2=A0=

=C2=A0 There will eventually be a discussion on = the thresholds we use

=C2=A0 in the search // load rate control algori= thm. The copy of

=C2=A0=C2=A0Y.1540 I sent you has a simple one, = we moved beyond that now

=C2=A0 (see the slides I didn=E2=80=99t get to p= resent at IETF).

=C2=A0=

=C2=A0 There is value in having some of this dis= cussion on IPPM-list,

=C2=A0 so we get some *agenda time at IETF-10= 6*

=C2=A0=

We measure rate and performance, with some perfo= rmance limits

built-in.=C2=A0 Pass/Fail is another step, de-ra= ting too (made sense

with MBM =E2=80=9Ctarget_rate=E2=80=9D).<= span lang=3D"EN-US">

=C2=A0=

Al

=C2=A0

---------- From: <Rue= diger.Geib@telekom.de>
Date: Mon, Aug 26, 2019 at 12:05 AM
To: <acm@resea= rch.att.com>
Cc: <lc9892@att.com<= /a>>, <mat= tmathis@google.com>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved.= I don=E2=80=99t have a precise answer and doubt, that there will be a sing= le universal truth.

=C2=A0

If the aim is only to determine= the IP bandwidth of an access, then we aren=E2=80=99t interested in fillin= g a buffer. Buffering events may occur, some of which are useful and to be expected, whereas others are not desired:

=C2=A0

  • Sender shaping behavior may matter (is traffic at the = source CBR or is it bursty)
  • Random collisions should be tolerated at the access wh= ose bandwidth is to be measured.
  • Limiting packet drop due to buffer overflow is a desig= n aim or an important part of the algorithm, I think.<= /li>
  • Shared media might create bursts. I=E2=80=99m not an e= xpert in the area, but there=E2=80=99s an =E2=80=9Cis bandwidth available= =E2=80=9D check in some cases between a central sender using a shared mediu= m and the receivers connected. WiFi and may be other wireless equipment buffers packets also to optimize wireless resource optimization.=
  • It might be an idea to mark some flows by ECN, once th= ere=E2=80=99s a guess on a sending bitrate when to expect no or very little= packet drop. Today, this is experimental. CE marks by an ECN capable devic= e should be expected roughly once queuing starts.

=C2=A0

Practically, the set-up should = be configurable with commodity hard- and software and all metrics should be= measurable at the receiver. Burstiness of traffic and a distinction between queuing events which are to be expected and (undesir= ed) queue build up are the events to be distinguished. I hope that can be d= one with commodity hard- and software. I at least am not able to write down= a simple metric distinguishing queues to be expected from (undesired) queue build up causing congestion. = The hard- and software to be used should be part of the solution, not part = of the problem (bursty source traffic and timestamps with insufficient accu= racy to detect queues are what I=E2=80=99d like to avoid).

=C2=A0

I=E2=80=99d suggest to move dis= cussion to the list.

=C2=A0

Regards,

=C2=A0

R=C3=BCdiger

=C2=A0

---------- From: MORTON, ALFRED= C (AL) <acm@research.att.com>
Date: Thu, Sep 19, 2019 at 7:01 AM
To: Ruediger.= Geib@telekom.de <Ruediger.Geib@telekom.de>
Cc: CIAVATTONE, LEN <lc9892@att.com>, mattmathis@google.com <mattmathis@google.com>

=C2=A0

I=E2=80=99m catching-up with this thread again, = but before I reply:

=C2=A0=

*** Any objection to moving this discussion to I= PPM-list ?? ***

=C2=A0=

@Matt =E2=80=93 this is a question to you at thi= s point...

=C2=A0=

thanks,

Al

=C2=A0

From: Ruediger.Geib= @telekom.de [mailto:Ruediger.Geib@telekom.de]
Sent: Monday, August 26, 2019 3:05 AM
To: MORTON, ALFRED C (AL) <acm@research.att.com>
Cc: CIAVATTONE, LEN <lc9892@att.com>; mattmathis@googl= e.com
Subject: AW: How should capacity measurement interact with shaping?<= u>

=C2=A0

Hi Al,

=C2=A0

thanks for keeping me involved.= I don=E2=80=99t have a precise answer and doubt, that there will be a sing= le universal truth.

=C2=A0

If the aim is only to determine= the IP bandwidth of an access, then we aren=E2=80=99t interested in fillin= g a buffer. Buffering events may occur, some of which are useful and to be expected, whereas others are not desired:

=C2=A0

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 Sender shaping behavior may matter (is traffic = at the source CBR or is it bursty)

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 Random collisions should be tolerated at the ac= cess whose bandwidth is to be measured.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 Limiting packet drop due to buffer overflow is = a design aim or an important part of the algorithm, I think.<= /span>

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 Shared media might create bursts. I=E2=80=99m n= ot an expert in the area, but there=E2=80=99s an =E2=80=9Cis bandwidth avai= lable=E2=80=9D check in some cases between a central sender using a shared = medium and the receivers connected. WiFi and may be other wireless equipment buffers packets also to optimize wireless resource optimization.=

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 It might be an idea to mark some flows by ECN, = once there=E2=80=99s a guess on a sending bitrate when to expect no or very= little packet drop. Today, this is experimental. CE marks by an ECN capabl= e device should be expected roughly once queuing starts.

=C2=A0

--00000000000002901805933cb2bf-- From nobody Mon Sep 23 16:53:26 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1D70C120047 for ; Mon, 23 Sep 2019 16:53:25 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 J9ch7SkB9pOf for ; Mon, 23 Sep 2019 16:53:22 -0700 (PDT) Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 49DFC120089 for ; Mon, 23 Sep 2019 16:53:22 -0700 (PDT) Received: by mail-lf1-x135.google.com with SMTP id r22so11528232lfm.1 for ; Mon, 23 Sep 2019 16:53:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=GamoIrxME0OuYGudHWtJU/Dx68OoqXz5RDti+5SyT20=; b=S9GRUuJwZm647HgUwzV95LU/0pmmwUBQxXOLD+Ykl4zLKJQLRYMRD/3gFuc/X3RowU S+AiomRMtlhPmWsguckB3K4yiLwFNqcHgPBrT8X1+JQ4oblQE/1kJDwC9h+jiKeIgZjx k390WCJr5Lwb2IUFz43xBYDDEvVvrlIcMZgRJOboHuygJV/t8Xwlj7oLrAbgYdyGQRt7 FRrHI7kM6T/gfdJfEzQitUB/blFMX+SWkJ3SBdfHYH7uZAQ3/bMHybOwgtfcOrbJDbrY 13X/TtPBuoVLM2eYBCvtJinvK5GKq3dcLYtE+1fNaVKdxooXP8MfKBfaB1nFniFPQEoI KzYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=GamoIrxME0OuYGudHWtJU/Dx68OoqXz5RDti+5SyT20=; b=D7XaFvkXP+ztNbAhx/ZpjFe4ZSvEruP3hmhjUL4J8XDeRN9JJoUKnYFBNXClEyhX/H Wp1aUd5LuxCmGF1kxLDijadrbtiuKVWU/6vpE4kmec6yTPCCt6KeqaA+kNF58EG6zGGF d8VeaijC9T7yZvmfso90ft+bPuRrKpTIcMLYr+nLYs8FokPbBWvuFVBy0ocOGQO/t4oA SXMMorGhEw5gQmkJHixtJePwMv+OdjTjDTkat7mfkzceVXFRbmWDwn46yxZIi23YoUWm 92NUGSoiUn6ZoOpuHfllG62NBrhEXvMMcLMhsxyNhI8tEpqIK615OYlr9F+UZwhauenc M/Jw== X-Gm-Message-State: APjAAAU3ew/GnpvBzmeYN7o9hqoX+oc9qNXF6293+il4o+v/3EZkuezP CfsqR21NnCNSeChJyxPpi8R3xZZzoVqj8IWqnXJ+XW6K X-Google-Smtp-Source: APXvYqx8517zM+E6/dWtIAJ2XZdyET/kw3ktncHY5xEkPIhnc+WoWjWjkOMkPyxLr8l0IrX7vCsTFoc9agVkS1U++Kc= X-Received: by 2002:ac2:51ce:: with SMTP id u14mr1126010lfm.72.1569282800036; Mon, 23 Sep 2019 16:53:20 -0700 (PDT) MIME-Version: 1.0 References: <156902093468.5129.8817465542307586997@ietfa.amsl.com> In-Reply-To: <156902093468.5129.8817465542307586997@ietfa.amsl.com> From: Greg Mirsky Date: Mon, 23 Sep 2019 16:53:09 -0700 Message-ID: To: IETF IPPM WG Content-Type: multipart/alternative; boundary="000000000000d930a00593411faf" Archived-At: Subject: [ippm] Fwd: I-D Action: draft-ietf-ippm-stamp-option-tlv-01.txt X-BeenThere: ippm@ietf.org 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: Mon, 23 Sep 2019 23:53:25 -0000 --000000000000d930a00593411faf Content-Type: text/plain; charset="UTF-8" Dear All, in this update to the draft, we've introduced the new extension to STAMP, Access Report TLV. The new TLV may be used by UE to report to UPF the operational state of a network. Your questions, comments, and suggestions are always welcome and much appreciated. Regards, Greg ---------- Forwarded message --------- From: Date: Fri, Sep 20, 2019 at 4:09 PM Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-option-tlv-01.txt To: Cc: 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 Two-way Active Measurement Protocol Optional Extensions Authors : Greg Mirsky Xiao Min Guo Jun Henrik Nydell Richard Foote Adi Masputra Filename : draft-ietf-ippm-stamp-option-tlv-01.txt Pages : 19 Date : 2019-09-20 Abstract: This document describes optional extensions to Simple Two-way Active Measurement Protocol (STAMP) which enable measurement performance metrics in addition to ones supported by the STAMP base specification. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-option-tlv/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-stamp-option-tlv-01 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-stamp-option-tlv-01 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-stamp-option-tlv-01 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ _______________________________________________ ippm mailing list ippm@ietf.org https://www.ietf.org/mailman/listinfo/ippm --000000000000d930a00593411faf Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
in this update to the draft, we've intro= duced the new extension to STAMP, Access Report TLV. The new TLV may be use= d by UE to report to UPF the operational state of a network.
Your= questions, comments, and suggestions are always welcome and much appreciat= ed.

Regards,
Greg

---------- Forwarded mess= age ---------
From: <internet-drafts@ietf.org>
Date: Fri, Sep 20= , 2019 at 4:09 PM
Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-opti= on-tlv-01.txt
To: <i-d-anno= unce@ietf.org>
Cc: <ippm@iet= f.org>



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

=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:= Simple Two-way Active Measurement Protocol Optional Extensions
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: Greg= Mirsky
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Xiao Min
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Guo Jun
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Henrik Nydell
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Richard Foote
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 Adi Masputra
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-iet= f-ippm-stamp-option-tlv-01.txt
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:= 19
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 := 2019-09-20

Abstract:
=C2=A0 =C2=A0This document describes optional extensions to Simple Two-way = Active
=C2=A0 =C2=A0Measurement Protocol (STAMP) which enable measurement performa= nce
=C2=A0 =C2=A0metrics in addition to ones supported by the STAMP base
=C2=A0 =C2=A0specification.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/d= raft-ietf-ippm-stamp-option-tlv/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-iet= f-ippm-stamp-option-tlv-01
https://datatracker.ietf.or= g/doc/html/draft-ietf-ippm-stamp-option-tlv-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?= url2=3Ddraft-ietf-ippm-stamp-option-tlv-01


Please note that it may take a couple of minutes from the time of submissio= n
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--000000000000d930a00593411faf-- From nobody Mon Sep 23 18:30:00 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1CF6C12009C for ; Mon, 23 Sep 2019 18:29:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.697 X-Spam-Level: X-Spam-Status: No, score=-3.697 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, SUBJ_ALL_CAPS=0.5, 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 inrOp2O2n_oJ for ; Mon, 23 Sep 2019 18:29:56 -0700 (PDT) Received: from blaze.cs.jhu.edu (blaze.cs.jhu.edu [128.220.13.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 25A0A120024 for ; Mon, 23 Sep 2019 18:29:56 -0700 (PDT) Received: from web3.cs.jhu.edu (web3.cs.jhu.edu [128.220.13.76]) (user=soudeh mech=LOGIN bits=0) by blaze.cs.jhu.edu (8.14.4/8.14.4) with ESMTP id x8O1Tsal045911 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Mon, 23 Sep 2019 21:29:55 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Mon, 23 Sep 2019 21:29:54 -0400 From: Soudeh Ghorbani To: ippm@ietf.org Reply-To: soudeh@cs.jhu.edu Mail-Reply-To: soudeh@cs.jhu.edu Message-ID: <727ec1b1ac4dcf1f37a9735fa5997dbf@cs.jhu.edu> X-Sender: soudeh@cs.jhu.edu User-Agent: Roundcube Webmail/1.0.12 Received-SPF: None client-ip=128.220.13.76; helo=web3.cs.jhu.edu; envelope-from= receiver=blaze.cs.jhu.edu Archived-At: Subject: [ippm] SOSR 2020 CFP X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 01:29:59 -0000 We are excited to announce that the ACM SIGCOMM Symposium on SDN Research (SOSR) 2020 will be co-located with the Open Compute Project (OCP) Global Summit. New this year, in addition to traditional research papers, we are soliciting "Experience and Challenge" papers that provide a retrospective of the practical impacts of SDN deployments and outline next steps, challenges, and radical ideas for SDNs. * Abstract registration: Nov 8, 2019 * Submission deadline: Nov 15, 2019 * More information: https://conferences.sigcomm.org/sosr/2020/calls.html Submit your best papers! -- Soudeh Ghorbani Assistant Professor Department of Computer Science Johns Hopkins University soudeh.net From nobody Tue Sep 24 02:20:11 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 40CF712082D for ; Tue, 24 Sep 2019 02:20:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.197 X-Spam-Level: X-Spam-Status: No, score=-4.197 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=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 TVuqTCT-HrBT for ; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: Subject: Re: [ippm] Fwd: How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 09:20:10 -0000 Matt, access technology was the first question I wanted to ask yesterday, you answered it in your last email. Some more comments, questions, and observations: - On-demand capacity allocation over time was/is common for mobile cellular access technologies. Superposition of algorithms at various layers (cellular access capacity management, buffering, users in the cell and CCA) generates challenging traces. - Some details on the measurement architecture could help: where did you measure BTC: at the receiver, at the sender, at intermediate nodes? Time granularity/resolution? - Al made several good points in his replies; the overshooting of BBR in Fig.5a of http://web.cs.wpi.edu/~claypool/papers/driving-bbr/paper-final.pdf is a hint that *if* there are buffers on the path, BBR will attempt to use them. It's the sequence cache-memory-network: first you fill up all local buffers, then the ones at intermediate nodes on the path, and only later on you can measure the network capacity. Still, 4 seconds for the initial 94.5 Mbit/s burst means truly large buffers... You asked for an answer and justification - here we go: Boiling down to the essence, your question (which capacity to prefer, 94.5 or 83Mb/s) imo addresses a weakness of RFC3148. In particular a more accurate definition and refinement of "long term" could help. Quoting RFC 3148: "The intuitive definition of BTC is the expected *long term* average data rate (bits per second) of a single ideal TCP implementation over the path in question". Is *long term* 4 seconds? 10s? 1000s? My interpretation is that you meant a "time interval sufficiently large for CCA to converge and reach a steady state" (D1). However, this definition considers E2E control/CCA *only* and falls short of the pitfall that Al and I attempted to address in RFC 7312 for delay measurements in mobile network measurements: today's (access) networks are stateful (the copper wire abstraction fails). This stateful network policing interacts with the end-to-end CCA and originates artificial, non-representative and non-repeatable measurement results. In DOCSIS (that I did not measure) it seems that buffering is the main issue. Some more reasoning on your BTC measurements: - In your measurements, when BTC is measured at the sender, the informal definition (D1) seems to hold true for a flow that lasts for slightly less than 4 seconds. But do BTC measurements at the receiver's end yield the same results? They may or may not. - If the flow duration exceeds 4 seconds, the convergence criterion (as seen by the sender) is no longer fulfilled: conditions change. - If I'm asked if 94.5Mb/s or 83Mb/s is "the" path BTC, my decision depends on the receiver view: (a) if some buffers on the network path fill up, but the data rate at the receiver is only 83Mb/s, then the network path's BTC is 83Mb/s. If there's a shaper on the path that grants an initial "data credit" to the sender at full speed and only later on shapes, i.e, the receiver can measure 94.5Mb/s for the first 4 seconds, then I'd agree to a BTC of 94.5Mb/s. However, only for the first 4 second interval or for the first y Mbytes of data. My point is that (unfortunately) the measurement of BTC for a network path must be tied to use cases to be meaningful. I'm truly convinced that with today's networks it's an illusion to have one single, representative value "BTC is x Mb/s". Decoupling BTC from the network path's state and its evolution with time may not be feasible. Reasoning on objective BTC: First, the measurement of stateful network BTC mandate to take into consideration parameters like (a) the network path implementation, configuration and behavior, (b) the measurement point (sender, receiver, intermediate point), and (c) the measurement flow characteristics (duration, total amount of data? Any parameter that influences on the network state wrt the flow?). These are just examples, it may make sense to structure and categorize these influencing parameters. Second, the definition (D1) in RFC3148 could be refined. The *long term* should be made explicit, covering two mandatory components: (a) CCA (end-to-end control) reaching a steady state and (b) the network path under observation reaching a steady state over (c) a well-specified interval. In order to be meaningful (and scientifically sound), BTC as an intuitive metric should imho reflect a network path's ability to offer a sustained transfer capacity under (almost) constant conditions for a specified time interval (and/or for a specified amount of data?). Still, architecture and implementation of today's (access) networks make it challenging to identify those intervals during which we have constant conditions. So the key question is if one can provide a BTC definition that is accurate, representative and simple/usable for the broad mass. (*) Al and his co-authors have included some key aspect in the capacity-metric draft, some aspects of this thread may be added there, too. But BTC imo is different and even more complex to measure. regards Joachim PS: (*) Leaving aside uncertainty that we will never be able to handle in measurements because of the capacity-sharing in today's access networks (users-in-a-cell, cell usage). On 19/09/2019 23:17, Matt Mathis wrote: > Ok, moving the thread to IPPM > > Some background, we (Measurement Lab) are testing a new transport (TCP) > performance measurement tool, based on BBR-TCP.   I'm not ready to talk > about results yet (well ok, it looks pretty good).    (BTW the BBR > algorithm just happens to resemble the algorithm described > in draft-morton-ippm-capcity-metric-method-00.) > > Anyhow we noticed some interesting performance features for number of > ISPs in the US and Europe and I wanted to get some input for how these > cases should be treated. > > One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, > fluctuating performance ~75 Mb/s for ~1 second and then stable > performance at ~83Mb/s for the rest of the 10 second test.    If I were > to guess this is probably a policer (shaper?) with a 1 MB token bucket > and a ~83Mb/s token rate (these numbers are not corrected for header > overheads, which actually matter with this tool).  What is weird about > it is that different ingress interfaces to the ISP (peers or > serving locations) exhibit different parameters.   > > Now the IPPM measurement question:   Is the bulk transport capacity of > this link ~94.5 Mbit/s or ~83Mb/s?   Justify your answer....? > > Thanks, > --MM-- > The best way to predict the future is to create it.  - Alan Kay > > We must not tolerate intolerance; >        however our response must be carefully measured:  >             too strong would be hypocritical and risks spiraling out of > control; >             too weak risks being mistaken for tacit approval. > > Forwarded Conversation > Subject: How should capacity measurement interact with shaping? > ------------------------ > > From: *Matt Mathis* > > Date: Thu, Aug 15, 2019 at 8:55 AM > To: MORTON, ALFRED C (AL) > > > > We are seeing shapers  with huge bucket sizes, perhaps as larger or > larger than 100 MB. > > These are prohibitive to test by default, but can have a huge impact in > some common situations.  E.g. downloading software updates. > > An unconditional pass is not good, because some buckets are small.  What > counts as large enough to be ok, and what "derating" is ok? > > Thanks, > --MM-- > The best way to predict the future is to create it.  - Alan Kay > > We must not tolerate intolerance; >        however our response must be carefully measured:  >             too strong would be hypocritical and risks spiraling out of > control; >             too weak risks being mistaken for tacit approval. > > > ---------- > From: *MORTON, ALFRED C (AL)* > > Date: Mon, Aug 19, 2019 at 5:08 AM > To: Matt Mathis > > Cc: CIAVATTONE, LEN >, > Ruediger.Geib@telekom.de > > > > > Hi Matt, currently cruising between Crete and Malta,____ > > with about 7 days of vacation remaining – Adding my friend Len.____ > > You know Rüdiger. It appears I’ve forgotten how to typs in 2 weeks____ > > given the number of typos I’ve fixed so far...____ > > __ __ > > We’ve seen big buffers on a basic DOCSIS cable service (downlink >2 sec)____ > > but,____ > >   we have 1-way delay variation or RTT variation limits____ > >   when searching for the max rate, that don’t many packets ____ > >   queue in the buffer____ > > __ __ > >   we want the status messages that result in rate adjustment to return____ > >  in a reasonable amount of time (50ms + RTT)____ > > __ __ > >   we usually search for 10 seconds, but if we go back and test with ____ > >   a fixed rate, we can see the buffer growing if the rate is too high.____ > > __ __ > >   There will eventually be a discussion on the thresholds we use____ > >   in the search // load rate control algorithm. The copy of ____ > >   Y.1540 I sent you has a simple one, we moved beyond that now____ > >   (see the slides I didn’t get to present at IETF).____ > > __ __ > >   There is value in having some of this discussion on IPPM-list,____ > >   so we get some **agenda time at IETF-106** ____ > > __ __ > > We measure rate and performance, with some performance limits____ > > built-in.  Pass/Fail is another step, de-rating too (made sense ____ > > with MBM “target_rate”).____ > > __ __ > > Al____ > > > > ---------- > From: > > Date: Mon, Aug 26, 2019 at 12:05 AM > To: > > Cc: >, > > > > Hi Al,____ > > __ __ > > thanks for keeping me involved. I don’t have a precise answer and doubt, > that there will be a single universal truth. ____ > > __ __ > > If the aim is only to determine the IP bandwidth of an access, then we > aren’t interested in filling a buffer. Buffering events may occur, some > of which are useful and to be expected, whereas others are not desired:____ > > __ __ > > * Sender shaping behavior may matter (is traffic at the source CBR or > is it bursty)____ > * Random collisions should be tolerated at the access whose bandwidth > is to be measured.____ > * Limiting packet drop due to buffer overflow is a design aim or an > important part of the algorithm, I think.____ > * Shared media might create bursts. I’m not an expert in the area, but > there’s an “is bandwidth available” check in some cases between a > central sender using a shared medium and the receivers connected. > WiFi and may be other wireless equipment buffers packets also to > optimize wireless resource optimization.____ > * It might be an idea to mark some flows by ECN, once there’s a guess > on a sending bitrate when to expect no or very little packet drop. > Today, this is experimental. CE marks by an ECN capable device > should be expected roughly once queuing starts.____ > > __ __ > > Practically, the set-up should be configurable with commodity hard- and > software and all metrics should be measurable at the receiver. > Burstiness of traffic and a distinction between queuing events which are > to be expected and (undesired) queue build up are the events to be > distinguished. I hope that can be done with commodity hard- and > software. I at least am not able to write down a simple metric > distinguishing queues to be expected from (undesired) queue build up > causing congestion. The hard- and software to be used should be part of > the solution, not part of the problem (bursty source traffic and > timestamps with insufficient accuracy to detect queues are what I’d like > to avoid).____ > > __ __ > > I’d suggest to move discussion to the list. ____ > > __ __ > > Regards,____ > > __ __ > > Rüdiger____ > > > > ---------- > From: *MORTON, ALFRED C (AL)* > > Date: Thu, Sep 19, 2019 at 7:01 AM > To: Ruediger.Geib@telekom..de > > > Cc: CIAVATTONE, LEN >, > mattmathis@google.com > > > > > I’m catching-up with this thread again, but before I reply:____ > > __ __ > > *** Any objection to moving this discussion to IPPM-list ?? ***____ > > __ __ > > @Matt – this is a question to you at this point...____ > > __ __ > > thanks,____ > > Al____ > > __ __ > > *From:*Ruediger.Geib@telekom.de > [mailto:Ruediger.Geib@telekom.de ] > *Sent:* Monday, August 26, 2019 3:05 AM > *To:* MORTON, ALFRED C (AL) > > *Cc:* CIAVATTONE, LEN >; > mattmathis@google.com > *Subject:* AW: How should capacity measurement interact with shaping?____ > > __ __ > > Hi Al,____ > > __ __ > > thanks for keeping me involved. I don’t have a precise answer and doubt, > that there will be a single universal truth. ____ > > __ __ > > If the aim is only to determine the IP bandwidth of an access, then we > aren’t interested in filling a buffer. Buffering events may occur, some > of which are useful and to be expected, whereas others are not desired:____ > > __ __ > > __-        __Sender shaping behavior may matter (is traffic at the > source CBR or is it bursty)____ > > __-        __Random collisions should be tolerated at the access whose > bandwidth is to be measured.____ > > __-        __Limiting packet drop due to buffer overflow is a design aim > or an important part of the algorithm, I think.____ > > __-        __Shared media might create bursts. I’m not an expert in the > area, but there’s an “is bandwidth available” check in some cases > between a central sender using a shared medium and the receivers > connected. WiFi and may be other wireless equipment buffers packets also > to optimize wireless resource optimization.____ > > __-        __It might be an idea to mark some flows by ECN, once there’s > a guess on a sending bitrate when to expect no or very little packet > drop. Today, this is experimental. CE marks by an ECN capable device > should be expected roughly once queuing starts.____ > > > > > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm > From nobody Tue Sep 24 03:14:35 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C63A112004A for ; Tue, 24 Sep 2019 03:14:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.298 X-Spam-Level: X-Spam-Status: No, score=-4.298 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=telekom.de 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 ABTR0WBTj4HP for ; Tue, 24 Sep 2019 03:14:29 -0700 (PDT) Received: from mailout11.telekom.de (mailout11.telekom.de [194.25.225.207]) (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 4EEB3120043 for ; Tue, 24 Sep 2019 03:14:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telekom.de; i=@telekom.de; q=dns/txt; s=dtag1; t=1569320054; x=1600856054; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=+BfEZzhJxM+0sy029k+8gF/D4g2uiCpqtWt1Pi5p+yw=; b=Zw2eb1zRJVu+ebAHx1TYIXjQYSM3uFbEaM0HAdd/sv/8NJ/27zejuLVQ 3HNP0j/zCgH7RFw58QaOk48Tufgf1EK/M6B4raXq+rN3i3FcIU61Tls5U THxWSCMe9hM7LDKhu4tRfpvy1O65rbLctPctoAXIc6b/6UjcvamwUN22g dhqMXZ0gZpcfLc6uw6/QedR1aF5H+3feYm4j+1UJsjXQz6NOsalKTPOkk BPX/q4fm1TTUcyctYa12EmmPI6BwyAUaEn7bBNH570QWcxhN6v+hKgGmZ kggR+fxVTjOFVqec7ArplsdHJNbS8P5NOcm65Dv4mGFat3daltK/LbYxB w==; Received: from qdezc2.de.t-internal.com ([10.171.255.37]) by MAILOUT11.dmznet.de.t-internal.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Sep 2019 12:14:12 +0200 X-IronPort-AV: E=Sophos;i="5.64,543,1559512800"; d="scan'208";a="153097423" X-MGA-submission: =?us-ascii?q?MDHgTaGvh0hVCNessHK0Jf0OGNyVcG6lugtZkP?= =?us-ascii?q?/vkTI8OXRWKaAjUNXjIrlrwRG9132BfoG9gAirwUZw32kzjo2xTan95C?= =?us-ascii?q?jaHWmeh/7u20YhlsYGzTaY4sVUTikQsheMVdapfACOk3xhUmbUhbEqWK?= =?us-ascii?q?gVOfeWdWQJOwdkjYTYkMIJfQ=3D=3D?= Received: from he199744.emea1.cds.t-internal.com ([10.169.119.52]) by qde0ps.de.t-internal.com with ESMTP/TLS/AES256-SHA; 24 Sep 2019 12:14:22 +0200 Received: from HE199743.EMEA1.cds.t-internal.com (10.169.119.51) by HE199744.emea1.cds.t-internal.com (10.169.119.52) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 24 Sep 2019 12:14:17 +0200 Received: from HE104163.emea1.cds.t-internal.com (10.171.40.38) by HE199743.EMEA1.cds.t-internal.com (10.169.119.51) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Tue, 24 Sep 2019 12:14:18 +0200 Received: from GER01-LEJ-obe.outbound.protection.outlook.de (51.5.80.23) by O365mail05.telekom.de (172.30.0.230) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 24 Sep 2019 12:14:18 +0200 Received: from LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE (10.158.145.12) by LEJPR01MB0651.DEUPRD01.PROD.OUTLOOK.DE (10.158.144.13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2284.25; Tue, 24 Sep 2019 10:14:17 +0000 Received: from LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE ([fe80::987d:70fa:4d72:d6da]) by LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE ([fe80::987d:70fa:4d72:d6da%5]) with mapi id 15.20.2284.023; Tue, 24 Sep 2019 10:14:17 +0000 From: To: CC: Thread-Topic: [ippm] Fwd: How should capacity measurement interact with shaping? 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[127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F3E92120118; Tue, 24 Sep 2019 05:31:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 JMUqQju6eS66; Tue, 24 Sep 2019 05:31:46 -0700 (PDT) Received: from mail-ua1-x935.google.com (mail-ua1-x935.google.com [IPv6:2607:f8b0:4864:20::935]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com 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b=LIVHqqz5/sotQjM3/5DFlcjHzOml6/b4Ycw4UXaPLzPWmrDVdbRbovbf1DtaaVUP1M Rx4c4y7zSQHzEBgqzGbTF0+v9QKcdFdg4C3mtV/hG8A1xF3BqNj1IO3ofgJF/CnIMs/Z paZeXgkBDUue49doVTX6FsjuDuymI5SVg3o4hCE1Llm358q0NE35XCXOrqV0GgYC6UEX P9hWR9Qg8qrBPboBAomr+JylCZbp9uQQKXgLguQiaL4DSR/OBjaQ8nVqJQZykCcNiP7x h2RcOsNt1b0gJWF7YVQumdJoKArD1d3tg0YxbavSTFm+CYtiGcDLV9q3ZwnRXyEraz4H 4DRA== X-Gm-Message-State: APjAAAVOZjubIBikrvCxuzjd3zoWqeFvOiDbHxW18I0LXvY1r7Q6jovm zXfFAwmKCxmHwmUMrTKRXur4mqLn82RPj05kzUede0sZ X-Google-Smtp-Source: APXvYqymrmtbJJmuG0wY8OsWVIAWeJrLyzsRkz3/cLhdmpW9CvFuO7VvEscc1Konv1neiLUMWu/ZXZ5tMSy1cWOd1Jw= X-Received: by 2002:ab0:21d7:: with SMTP id u23mr1288803uan.142.1569328305041; Tue, 24 Sep 2019 05:31:45 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Akshaya Nadahalli Date: Tue, 24 Sep 2019 18:01:34 +0530 Message-ID: To: tpauly=40apple.com@dmarc.ietf.org, ippm@ietf.org Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org Content-Type: multipart/alternative; boundary="00000000000028772305934bb800" Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 12:31:48 -0000 --00000000000028772305934bb800 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Support Regards, Akshaya N =EF=BB=BFOn 9/11/19, 9:41 PM, "tpauly@apple.com on behalf of Tommy Pauly" < > tpauly@apple.com> wrote: > > Hello IPPM, > > This email starts a working group adoption call for > draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the IPv= 6 > option encapsulation for IOAM data. This document was discussed with the > 6man WG, which advised that the work be done in ippm, with review by 6man= . > > The documents are available here: > > > https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-optio= ns/ > > https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 > > Please reply to this email by Wednesday, September 25, with your inpu= t > on whether or not the WG should adopt this document. > > Best, > Tommy (as IPPM co-chair) > > --00000000000028772305934bb800 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Support

Regards,
A= kshaya N

=EF=BB=BFOn 9/11/19, 9:41 PM, "tpauly@apple.com on beh= alf of Tommy Pauly" <tpauly@apple.com> wrote:

=C2=A0 =C2=A0 Hello IPPM,

=C2=A0 =C2=A0 This email starts a working group adoption call for draft-ioa= metal-ippm-6man-ioam-ipv6-options. This document defines the IPv6 option en= capsulation for IOAM data. This document was discussed with the 6man WG, wh= ich advised that the work be done in ippm, with review by 6man.

=C2=A0 =C2=A0 The documents are available here:

=C2=A0 =C2=A0 https://da= tatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-options/
=C2=A0 =C2=A0 https://tools= .ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02

=C2=A0 =C2=A0 Please reply to this email by Wednesday, September 25, with y= our input on whether or not the WG should adopt this document.

=C2=A0 =C2=A0 Best,
=C2=A0 =C2=A0 Tommy (as IPPM co-chair)

--00000000000028772305934bb800-- From nobody Tue Sep 24 08:55:25 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 04FEC12013D for ; Tue, 24 Sep 2019 08:55:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=herbertland-com.20150623.gappssmtp.com 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 wnIGFzP-0APx for ; Tue, 24 Sep 2019 08:55:19 -0700 (PDT) Received: from mail-ed1-x530.google.com (mail-ed1-x530.google.com [IPv6:2a00:1450:4864:20::530]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4CDF01200D6 for ; Tue, 24 Sep 2019 08:55:19 -0700 (PDT) Received: by mail-ed1-x530.google.com with SMTP id a15so2315213edt.6 for ; Tue, 24 Sep 2019 08:55:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=herbertland-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=e65DgOjjQx2YZBL6vSLr6MKbl/j8xS8shCd1niJGUS4=; b=lwhmPNJ4QLm29dQEFB8HUjiiwAU50eQtb3SWXY1YQ82T+rsJtK4nIrExIr3KmZmnkf KwM0Gdos0NOtAipzOg1eimYmIVstOMVg8TLxMkCj89dEbTY+yjFx34vsSskzb8eQzBLg SvjmPfleFgIwQc+AatyicnpHmSTE5VllBxELDmiC0154JPXk/T3H4KIZ60oqSOvt8sTx 7hhpe6FDmMiiPaxy09h86upA75BOQ40lc2010jj7EbGZgvglC7/gZCSEXunyNElbG8lf WdfGPun+WUofGS+uh5Peo2V1ZmZHMvrePflsPym0krdTG2joAZTaikLRzUu86gn+jlxd 0N4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=e65DgOjjQx2YZBL6vSLr6MKbl/j8xS8shCd1niJGUS4=; b=NWPH/r8WETTxpOf40xbqBOhbef5vD526TKu32AiFpLDxNLFTrWLNyFbhYTH69OMnkz NYtzp0rPEDomKRisE51coT+mI38XsdAUmqM11USmbusAMZSE17oGy3zex8hSu3yUfGF9 g+ODRK9KUe5iBebZKNhB/SOREoseN78ABxbwwrYSjamnV6WPBIJSpBiF5r9aev3AxCQP S5FmC4W2lZr1Aj2ioNn8fK16zZkrTjccrAffuxkvEHXWgObn4lmTpXWQJBfQCYDNNRAh kQXW8DyLtJKu8lJTMn0brQ2ibl1pIghtapBViMf0AnVTlpz5HpZzBslmY8G99tdxu7kZ i8zA== X-Gm-Message-State: APjAAAW4zYHXJbk3mr2FB42VK2wjIzTuma1U1iSANjnUzwmbIxC4XQ+S 9OgB2eCo+j1eB6YqgnavRv6lLDGLZ79ZbnEqvywFuA== X-Google-Smtp-Source: APXvYqzYMZCQWSC1N/uZRKZy5WkjL4DpS6otY2ik6keQOgtmT33SR3vL1vF8fKToAQxBhqF+qtke6B0491i+ZIfsmmg= X-Received: by 2002:a17:906:5295:: with SMTP id c21mr3132702ejm.80.1569340517682; Tue, 24 Sep 2019 08:55:17 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Tom Herbert Date: Tue, 24 Sep 2019 08:55:06 -0700 Message-ID: To: Greg Mirsky Cc: Tommy Pauly , Mirja Kuehlewind , draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org, 6man WG , IETF IPPM WG Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 15:55:22 -0000 I support this draft for WG adoption. We implemented the option at hackathon #104 as reported to the WG. Some replies to Greg points below. On Thu, Sep 19, 2019 at 11:56 AM Greg Mirsky wrote: > > Dear Authors, et al., > I have a number of questions on this draft and hope you'll find time to c= larify some aspects of iOAM encapsulation in IPv6 EHs: > > format of both Hop-by-Hop Options header and Destination Options header, = as defined in RFC 8200, allow the length of Options field in the header to = be no more than 2K - 2 octets. I consider that to be an important limitatio= n of the proposed encapsulation method but I don't find that being discusse= d in the document. What is the use case for having IOAM data consuming more than 2K bytes? > Section 3 of your draft defines iOAM Option encapsulation format. How thi= s encapsulation relates to the encapsulation of IPv6 options for the Hop-by= -Hop Options header and Destination Options header? Section 3 describes an option format for IOAM data using canonical format HBH and DO options. The first two bytes of Option Type and Option Data Len are straight out of RFC8200. > Section 4.2 in RFC 8200 defines four types of actions to be associated wi= th the option. Which of these and in what scenarios may be used to carry iO= AM information in IPv6 packet? Section 5 shows shows the act bits in requested IANA assignment to be 00, per RFC8200 "00 - skip over this option and continue processing the header.". That is appropriate for IOAM. > Also, in Section 4.2 defined on-bit long flag in the Option Type field to= indicate whether option data may change en route. How this flag will be us= ed when iOAM option data encapsulated in IPv6 EHs? It's used the same way as in other options. If the chg bit is set in the option then the Option data can change in flight, if it's not set then the data can't change. I suspect most use cases for IOAM will use the modifiable option. > Further, the question of choosing a padding option - Pad1 or PadN? Which = these two to be used for iOAM data in IPv6 EHs? > Either can be used. The type of option padding is orthogonal to any particular option. RFC8504 describes limits on option padding that might be applied, but these are generic and don't need to be mentioned in this draft. > With this number of technical issues being underspecified, I don't suppor= t the adoption of the draft by IPPM WG. And I feel that it would be more ap= propriate to ask 6man WG to host this work. I don't believe it's necessary for this to be in 6man. Definition a new IPv6 option that is compliant with RFC8200 is pretty straightforward. Tom > > Regards, > Greg > > On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly wrote: >> >> Hello IPPM, >> >> This email starts a working group adoption call for draft-ioametal-ippm-= 6man-ioam-ipv6-options. This document defines the IPv6 option encapsulation= for IOAM data. This document was discussed with the 6man WG, which advised= that the work be done in ippm, with review by 6man. >> >> The documents are available here: >> >> https://datatracker.ietf..org/doc/draft-ioametal-ippm-6man-ioam-ipv6-opt= ions/ >> https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-0= 2 >> >> Please reply to this email by Wednesday, September 25, with your input o= n whether or not the WG should adopt this document. >> >> Best, >> Tommy (as IPPM co-chair) >> _______________________________________________ >> ippm mailing list >> ippm@ietf.org >> https://www.ietf.org/mailman/listinfo/ippm > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- From nobody Tue Sep 24 10:19:51 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4A3B2120883; Tue, 24 Sep 2019 10:19:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.596 X-Spam-Level: X-Spam-Status: No, score=-0.596 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_COMMENT_SAVED_URL=1.391, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_HTML_ATTACH=0.01, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 qpFJ7jjgr8Zv; Tue, 24 Sep 2019 10:19:30 -0700 (PDT) Received: from mail-lj1-x22a.google.com (mail-lj1-x22a.google.com [IPv6:2a00:1450:4864:20::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8A1F612089F; Tue, 24 Sep 2019 10:19:17 -0700 (PDT) Received: by mail-lj1-x22a.google.com with SMTP id f5so2707739ljg.8; Tue, 24 Sep 2019 10:19:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=vqv/3x4gQ7yOwEpifj1k6Naxl6VRlFDkpZdJsYPAvLY=; b=kOMysoCGMurkwwRYimta6kblIkqpY6AwKbRxcn+23o8G+lIhAoscRnDDABEkR8zXyB F+bVYpNbmQQyRQJSGg+YheP9+B7LBUI044ICImfomCnSFLWm2lqmdY7PdlWGYbWgnVPx Blufy2fpjIEu0bsvaNaWxkV0YX2CdtOq9/8rc/sLWGPLoJGXcZUygYO7qcDTPecDJRRY hGyu5XKqVTpW3G9FKbcVwrxYEnI77WnwnkM1JVu9wzBAG2XLL40sMktp/CKRRguFA4N1 wqdnJhQtEaF9BpoBeZJ/OObC7AIKoipFu0BdGEbjsdJ2bamVPBnY064+jcFC8k0nG1db gTdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=vqv/3x4gQ7yOwEpifj1k6Naxl6VRlFDkpZdJsYPAvLY=; b=APDy9rjsIhb53s/mmmfoh6hyLrVaoTO2P2Icfidpiw2EPTm+9dcs/zL5Yon1xg18Fy zDssYVvCUgnLgjWCvVKsMpYzqwagHc+QaaeuahnGK2XCg1NehmyVtmH7QRMjft3/Rpmc ejnZGSdFzOBTej0QUM8pTxwtg2nfyJ6o1woyDuQoyYSue7/97Lq7RCSkQuGDuVK30C4M QnI9Oqe8vadp9N0x9OHFeusS8SNoX2uem0GVhTe2ueY7NJVKiRjf+YqbcLc3yDSnt95s lLA/Tn139ocZD/maDjZbrQ7UeKIYpxfFpCRvdJ0rKmHyC8iklvUvjaLTvuIxvFM9BELk CAkg== X-Gm-Message-State: APjAAAUtr1roAWL2uakcpLOVbhpzG12zcLIKT8yz8K5mYIjSaK25TZc7 YKg7FU9//jzmqYfzS2zJIYwLQ263fbqj09rHtNE= X-Google-Smtp-Source: APXvYqym5ralBC44mf1kpY/ZfAZpAv98BCZtyaD1lLxjNzV7r7+62XV0B+ATCjXK5uwoqtMcVv3gNBv0vsevA2Wbqj0= X-Received: by 2002:a2e:5d98:: with SMTP id v24mr2857862lje.56.1569345555405; Tue, 24 Sep 2019 10:19:15 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Greg Mirsky Date: Tue, 24 Sep 2019 10:19:04 -0700 Message-ID: To: Barry Leiba Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/mixed; boundary="0000000000005d2f3805934fbc9d" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 17:19:39 -0000 --0000000000005d2f3805934fbc9d Content-Type: multipart/alternative; boundary="0000000000005d2f3405934fbc9b" --0000000000005d2f3405934fbc9b Content-Type: text/plain; charset="UTF-8" Hi Barry, thank you for your suggestions. Based on your comments, the authors decided to add a new Operational Consideration section: NEW TEXT: 5. Operational Considerations STAMP is intended to be used on production networks to enable the operator to assess service level agreements based on packet delay, delay variation, and loss. Using STAMP over the Internet, especially when STAMP test packets are transmitted with the destination UDP port number from the User Ports range, the possible impact of the STAMP test packets MUST be thoroughly analyzed. The use of STAMP for each case MUST be agreed by users of nodes hosting the Session-Sender and Session-Reflector before starting the STAMP test session. Also, the use of the well-known port number as the destination UDP port number in STAMP test packets transmitted by a Session-Sender would not impede the ability to measure performance in an Equal Cost Multipath environment and analysis in Section 5.3 [RFC8545] fully applies to STAMP. As the new section includes the discussion of using port numbers from the User Ports range, the Security Considerations section has been updated to avoid the duplication (please see the attached working version and the diff). Much appreciate your comments on the updated text. Regards, Greg On Tue, Sep 10, 2019 at 5:51 PM Barry Leiba wrote: > Thanks, Greg; I look forward to it. > > b > > On Tue, Sep 10, 2019 at 8:35 PM Greg Mirsky wrote: > > > > Hi Barry, > > thank you for the clarification. Yes, I agree that a new section can > state it more clearly and give sufficient examples, as you've suggested. > > I'll work on it and will share when it is ready. > > > > Regards, > > Greg > > > > On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba > wrote: > >> > >> Hi, Greg, and thanks for the response. > >> > >> I think a minor rephrasing of the requirement isn't enough, really. > >> As I understand it now, after other discussion, it's not that you need > >> agreement from the users, but that you should put a paragraph (or > >> maybe a separate section, to highlight the point) that says that this > >> is not intended for use on the open Internet nor on production > >> networks, and gives examples of what it *is* intended for... perhaps > >> test networks, production networks during advertised maintenance > >> windows, that sort of thing. And then you don't need to say that the > >> network's users need to agree, but simply that they need to be aware > >> that performance testing will be happening during period X, and that > >> disruptions to normal network operation are possible. You'd need to > >> come up with text that the working group agrees with, of course, but I > >> think that if you do it will address my concern as well as some of the > >> others that were raised. > >> > >> Does that make sense? > >> > >> Barry > >> > >> On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky > wrote: > >> > > >> > Hi Barry, > >> > thank you for your pointed question. Please find my explanation and > the proposed updated below under the GIM>> tag. > >> > > >> > Regards, > >> > Greg > >> > > >> > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker < > noreply@ietf.org> wrote: > >> >> > >> >> Barry Leiba has entered the following ballot position for > >> >> draft-ietf-ippm-stamp-07: Discuss > >> >> > >> >> When responding, please keep the subject line intact and reply to all > >> >> email addresses included in the To and CC lines. (Feel free to cut > this > >> >> introductory paragraph, however.) > >> >> > >> >> > >> >> Please refer to > https://www.ietf.org/iesg/statement/discuss-criteria.html > >> >> for more information about IESG DISCUSS and COMMENT positions. > >> >> > >> >> > >> >> The document, along with other ballot positions, can be found here: > >> >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > >> >> > >> >> > >> >> > >> >> > ---------------------------------------------------------------------- > >> >> DISCUSS: > >> >> > ---------------------------------------------------------------------- > >> >> > >> >> I'm sure this will be easy to either explain to me or re-phrase: > >> >> > >> >> Sections 4 and 6 both say something like "MUST be agreed by all > users of the > >> >> network". What does that really mean? How is it remotely possible > to get > >> >> agreement from all users of your network? How is it remotely > possible that > >> >> they could understand what you're asking them to agree to? > >> > > >> > > >> > GIM>> Yes, looking at the bigger picture, at the Internet rather than > only at the domain where the test will be performed makes such condition > unattainable. Would s/network/network domain where the test is planned/ so > that it reads as: > >> > > >> > ... MUST be agreed by all users on the network domain where the test > is planned ... > >> > > >> > make it clearer and the number of parties involved reasonable, > practical? > >> > As for what the could be the question users will be asked, I think > that it should verify whether the application that has the port number > assigned is active as the same number will be used as the destination port > number in the STAMP test. > --0000000000005d2f3405934fbc9b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Barry,
thank you for your suggestions. Based on you= r comments, the authors decided to add a new Operational Consideration sect= ion:
NEW TEXT:
5.=C2=A0 Operational Considerations
<= br>=C2=A0 =C2=A0STAMP is intended to be used on production networks to enab= le the
=C2=A0 =C2=A0operator to assess service level agreements based on= packet delay,
=C2=A0 =C2=A0delay variation, and loss.=C2=A0 Using STAMP= over the Internet, especially
=C2=A0 =C2=A0when STAMP test packets are = transmitted with the destination UDP port
=C2=A0 =C2=A0number from the U= ser Ports range, the possible impact of the STAMP
=C2=A0 =C2=A0test pack= ets MUST be thoroughly analyzed.=C2=A0 The use of STAMP for each
=C2=A0 = =C2=A0case MUST be agreed by users of nodes hosting the Session-Sender and<= br>=C2=A0 =C2=A0Session-Reflector before starting the STAMP test session.
=C2=A0 =C2=A0Also, the use of the well-known port number as the desti= nation UDP
=C2=A0 =C2=A0port number in STAMP test packets transmitted by= a Session-Sender
=C2=A0 =C2=A0would not impede the ability to measure p= erformance in an Equal Cost
=C2=A0 =C2=A0Multipath environment and analy= sis in Section 5.3 [RFC8545] fully
=C2=A0 =C2=A0applies to STAMP.

As the new section includes the discussion of using = port numbers from the User Ports range, the Security Considerations section= has been updated to avoid the duplication (please see the attached working= version and the diff).

Much appreciate your comme= nts on the updated text.

Regards,
Greg

On Tue, Sep 10, 2019 at 5:51 PM Barry Leiba <barryleiba@computer.org> wrote:
Thanks, Greg; I look forward to = it.

b

On Tue, Sep 10, 2019 at 8:35 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
> Hi Barry,
> thank you for the clarification. Yes, I agree that a new section can s= tate it more clearly and give sufficient examples, as you've suggested.=
> I'll work on it and will share when it is ready.
>
> Regards,
> Greg
>
> On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba <barryleiba@computer.org> wrot= e:
>>
>> Hi, Greg, and thanks for the response.
>>
>> I think a minor rephrasing of the requirement isn't enough, re= ally.
>> As I understand it now, after other discussion, it's not that = you need
>> agreement from the users, but that you should put a paragraph (or<= br> >> maybe a separate section, to highlight the point) that says that t= his
>> is not intended for use on the open Internet nor on production
>> networks, and gives examples of what it *is* intended for... perha= ps
>> test networks, production networks during advertised maintenance >> windows, that sort of thing.=C2=A0 And then you don't need to = say that the
>> network's users need to agree, but simply that they need to be= aware
>> that performance testing will be happening during period X, and th= at
>> disruptions to normal network operation are possible.=C2=A0 You= 9;d need to
>> come up with text that the working group agrees with, of course, b= ut I
>> think that if you do it will address my concern as well as some of= the
>> others that were raised.
>>
>> Does that make sense?
>>
>> Barry
>>
>> On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky <gregimirsky@gmail.com> wrot= e:
>> >
>> > Hi Barry,
>> > thank you for your pointed question. Please find my explanati= on and the proposed updated below under the GIM>> tag.
>> >
>> > Regards,
>> > Greg
>> >
>> > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker &l= t;noreply@ietf.org> wrote:
>> >>
>> >> Barry Leiba has entered the following ballot position for=
>> >> draft-ietf-ippm-stamp-07: Discuss
>> >>
>> >> When responding, please keep the subject line intact and = reply to all
>> >> email addresses included in the To and CC lines. (Feel fr= ee to cut this
>> >> introductory paragraph, however.)
>> >>
>> >>
>> >> Please refer to https://w= ww.ietf.org/iesg/statement/discuss-criteria.html
>> >> for more information about IESG DISCUSS and COMMENT posit= ions.
>> >>
>> >>
>> >> The document, along with other ballot positions, can be f= ound here:
>> >> https://datatracker.ietf.or= g/doc/draft-ietf-ippm-stamp/
>> >>
>> >>
>> >>
>> >> ---------------------------------------------------------= -------------
>> >> DISCUSS:
>> >> ---------------------------------------------------------= -------------
>> >>
>> >> I'm sure this will be easy to either explain to me or= re-phrase:
>> >>
>> >> Sections 4 and 6 both say something like "MUST be ag= reed by all users of the
>> >> network".=C2=A0 What does that really mean?=C2=A0 Ho= w is it remotely possible to get
>> >> agreement from all users of your network?=C2=A0 How is it= remotely possible that
>> >> they could understand what you're asking them to agre= e to?
>> >
>> >
>> > GIM>> Yes, looking at the bigger picture, at the Intern= et rather than only at the domain where the test will be performed makes su= ch condition unattainable. Would s/network/network domain where the test is= planned/=C2=A0 so that it reads as:
>> >
>> > ... MUST be agreed by all users on the network domain where t= he test is planned ...
>> >
>> > make it clearer and the number of parties involved reasonable= , practical?
>> > As for what the could be the question users will be asked, I = think that it should verify whether the application that has the port numbe= r assigned is active as the same number will be used as the destination por= t number in the STAMP test.
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bHMvcmZjZGlmZi88L2E+IDwvdGQ+PC90cj4KICAgPC90Ym9keT48L3RhYmxlPgogICAKICAgCjwv Ym9keT48L2h0bWw+ --0000000000005d2f3805934fbc9d-- From nobody Tue Sep 24 10:30:03 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B70EE120874; Tue, 24 Sep 2019 10:29:48 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.922 X-Spam-Level: X-Spam-Status: No, score=-1.922 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.026, SPF_HELO_NONE=0.001, SPF_PASS=-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 zY-KqsFDzIBA; Tue, 24 Sep 2019 10:29:46 -0700 (PDT) Received: from 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APjAAAUKoHDJP5Sm0vsUEXXd/axruymM5TQnTrj87qVkW+YI4KFChCRO 2eI4m317x68QL00mQqzAzjZKVoItgxwTvtaz42HkAiCO X-Google-Smtp-Source: APXvYqxsnu2dz0AV7UDvwwm8C24A6otArZ9OfkNDDXPegCHYJJYR2xZlGkamfMk615TUroLpX3Z4i98Ipv9z12H9t6s= X-Received: by 2002:a6b:254:: with SMTP id 81mr4590975ioc.17.1569346184652; Tue, 24 Sep 2019 10:29:44 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Barry Leiba Date: Tue, 24 Sep 2019 13:29:33 -0400 Message-ID: To: Greg Mirsky Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: text/plain; charset="UTF-8" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 17:29:49 -0000 Greg, this looks good, and many thanks for that! Minor typo: Using STAMP over the Internet, especially when STAMP test packets are transmitted with the destination UDP port number from the User Ports range, the possible impact of the STAMP test packets MUST be thoroughly analyzed. It should say "When using STAMP over the Internet..." I'll clear the DISCUSS when this is posted as a draft revision. Barry On Tue, Sep 24, 2019 at 1:19 PM Greg Mirsky wrote: > > Hi Barry, > thank you for your suggestions. Based on your comments, the authors decided to add a new Operational Consideration section: > NEW TEXT: > 5. Operational Considerations > > STAMP is intended to be used on production networks to enable the > operator to assess service level agreements based on packet delay, > delay variation, and loss. Using STAMP over the Internet, especially > when STAMP test packets are transmitted with the destination UDP port > number from the User Ports range, the possible impact of the STAMP > test packets MUST be thoroughly analyzed. The use of STAMP for each > case MUST be agreed by users of nodes hosting the Session-Sender and > Session-Reflector before starting the STAMP test session. > > Also, the use of the well-known port number as the destination UDP > port number in STAMP test packets transmitted by a Session-Sender > would not impede the ability to measure performance in an Equal Cost > Multipath environment and analysis in Section 5.3 [RFC8545] fully > applies to STAMP. > > As the new section includes the discussion of using port numbers from the User Ports range, the Security Considerations section has been updated to avoid the duplication (please see the attached working version and the diff). > > Much appreciate your comments on the updated text. > > Regards, > Greg > > On Tue, Sep 10, 2019 at 5:51 PM Barry Leiba wrote: >> >> Thanks, Greg; I look forward to it. >> >> b >> >> On Tue, Sep 10, 2019 at 8:35 PM Greg Mirsky wrote: >> > >> > Hi Barry, >> > thank you for the clarification. Yes, I agree that a new section can state it more clearly and give sufficient examples, as you've suggested. >> > I'll work on it and will share when it is ready. >> > >> > Regards, >> > Greg >> > >> > On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba wrote: >> >> >> >> Hi, Greg, and thanks for the response. >> >> >> >> I think a minor rephrasing of the requirement isn't enough, really. >> >> As I understand it now, after other discussion, it's not that you need >> >> agreement from the users, but that you should put a paragraph (or >> >> maybe a separate section, to highlight the point) that says that this >> >> is not intended for use on the open Internet nor on production >> >> networks, and gives examples of what it *is* intended for... perhaps >> >> test networks, production networks during advertised maintenance >> >> windows, that sort of thing. And then you don't need to say that the >> >> network's users need to agree, but simply that they need to be aware >> >> that performance testing will be happening during period X, and that >> >> disruptions to normal network operation are possible. You'd need to >> >> come up with text that the working group agrees with, of course, but I >> >> think that if you do it will address my concern as well as some of the >> >> others that were raised. >> >> >> >> Does that make sense? >> >> >> >> Barry >> >> >> >> On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky wrote: >> >> > >> >> > Hi Barry, >> >> > thank you for your pointed question. Please find my explanation and the proposed updated below under the GIM>> tag. >> >> > >> >> > Regards, >> >> > Greg >> >> > >> >> > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker wrote: >> >> >> >> >> >> Barry Leiba has entered the following ballot position for >> >> >> draft-ietf-ippm-stamp-07: Discuss >> >> >> >> >> >> When responding, please keep the subject line intact and reply to all >> >> >> email addresses included in the To and CC lines. (Feel free to cut this >> >> >> introductory paragraph, however.) >> >> >> >> >> >> >> >> >> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html >> >> >> for more information about IESG DISCUSS and COMMENT positions. >> >> >> >> >> >> >> >> >> The document, along with other ballot positions, can be found here: >> >> >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ >> >> >> >> >> >> >> >> >> >> >> >> ---------------------------------------------------------------------- >> >> >> DISCUSS: >> >> >> ---------------------------------------------------------------------- >> >> >> >> >> >> I'm sure this will be easy to either explain to me or re-phrase: >> >> >> >> >> >> Sections 4 and 6 both say something like "MUST be agreed by all users of the >> >> >> network". What does that really mean? How is it remotely possible to get >> >> >> agreement from all users of your network? How is it remotely possible that >> >> >> they could understand what you're asking them to agree to? >> >> > >> >> > >> >> > GIM>> Yes, looking at the bigger picture, at the Internet rather than only at the domain where the test will be performed makes such condition unattainable. Would s/network/network domain where the test is planned/ so that it reads as: >> >> > >> >> > ... MUST be agreed by all users on the network domain where the test is planned ... >> >> > >> >> > make it clearer and the number of parties involved reasonable, practical? >> >> > As for what the could be the question users will be asked, I think that it should verify whether the application that has the port number assigned is active as the same number will be used as the destination port number in the STAMP test. From nobody Tue Sep 24 13:22:13 2019 Return-Path: X-Original-To: ippm@ietf.org Delivered-To: ippm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id CF86B12004E; Tue, 24 Sep 2019 13:22:04 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: ippm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.102.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: ippm@ietf.org Message-ID: <156935652475.15598.3593281288851863151@ietfa.amsl.com> Date: Tue, 24 Sep 2019 13:22:04 -0700 Archived-At: Subject: [ippm] I-D Action: draft-ietf-ippm-stamp-08.txt X-BeenThere: ippm@ietf.org X-Mailman-Version: 2.1.29 List-Id: IETF IP Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2019 20:22:05 -0000 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 Two-way Active Measurement Protocol Authors : Greg Mirsky Guo Jun Henrik Nydell Richard Foote Filename : draft-ietf-ippm-stamp-08.txt Pages : 15 Date : 2019-09-24 Abstract: This document describes a Simple Two-way Active Measurement Protocol which enables the measurement of both one-way and round-trip performance metrics like delay, delay variation, and packet loss. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-stamp-08 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-stamp-08 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-stamp-08 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Tue Sep 24 13:29:48 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C90531208A6; Tue, 24 Sep 2019 13:29:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 ViLa9tT6-_xo; Tue, 24 Sep 2019 13:29:42 -0700 (PDT) Received: from mail-lj1-x230.google.com (mail-lj1-x230.google.com [IPv6:2a00:1450:4864:20::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B6DCA1200CC; Tue, 24 Sep 2019 13:29:41 -0700 (PDT) Received: by mail-lj1-x230.google.com with SMTP id y3so3273970ljj.6; Tue, 24 Sep 2019 13:29:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=mk2TvD6O+sWU7ZpagUZ0fY8+6P6ktuIJKPynQOfNfJ4=; b=ZFMvJcDwMneYzOMVCcLTCEwP3RO62cyWVUuQPOMBG8+ZiBxsHZUROiFxd+Ey0a6Hun 0/TBncBMgTpTUWW5DIhzIPkd1OPwigJLVbQ+WT+ZUk8rwqRW1jFPufRyhCVTkZBMW7FM dnpw59/AZeEDaQapAwe91qCCoODNnJFtTHfyNwUludIBH9Wm3OccmxlG55qRJlEc/OuJ vKQGvbH5aQtPAiCwsAyM59pbOyqXUXjRLd5VIBZ7MtIBo0jQ7A0TCG7Zt3hjRT7+3yE3 ln1Be+qNaFUQZcufYoqQFZlggOU4tF5sh9ky72zAls6D0CR+ABdNCmqn7E/nQOdmHk1P Xedg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=mk2TvD6O+sWU7ZpagUZ0fY8+6P6ktuIJKPynQOfNfJ4=; b=QjmQdoPOVfZf5X5bXKwTM9Zf9jeD86aV47nIBcEBSIWiqeNT8pm39CbzLEpr6AUYEs 0p+31BYgHrFGDokRlffme7PUke/wriso/6qiafO7EiiHoetPip0lPL3pKAfLA18vSpbE LpO4PdMqRKToGOa6rt7ckNZ8Na6g/XYpOzcfshxmtcgWUBnSr3UJqy6ICEGCoy7HwuQR 69B7QLKDZbjwLAiE1mzW6e+kMj7wTSi6wVg0cp8Cj8uHsFoH9JkGg1odZUcfJPjfXZMo vnMttuRZFDcexedEHnnIS8ZJlb2sqgbYsFSGmU3OXMcPInXKCNQuEDxVlLjMSXg9T/6b Maew== X-Gm-Message-State: APjAAAURu1txXNSPFYstlZkdS2xNB3CsokM9k/n8y/M/IUCOYRH+p8yt XMfVbok/RjQjuGMD0kSmlaD/I5BtSFB2pTVaCRI= X-Google-Smtp-Source: APXvYqxJi5RixDdwQ4XOGx3LxAk8+zKTBJEmRJCWc3wLvJtiFabOQZTG2ZK5r4b+poFfbm79tKUvvkt1wFWAaZIioBA= X-Received: by 2002:a2e:b607:: with SMTP id r7mr3367374ljn.100.1569356979930; Tue, 24 Sep 2019 13:29:39 -0700 (PDT) MIME-Version: 1.0 References: <156761599202.22808.13015902618373150935.idtracker@ietfa.amsl.com> In-Reply-To: From: Greg Mirsky Date: Tue, 24 Sep 2019 13:29:30 -0700 Message-ID: To: Barry Leiba Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/alternative; boundary="000000000000508a1205935265dd" Archived-At: Subject: Re: [ippm] Barry Leiba's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS) X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 20:29:46 -0000 --000000000000508a1205935265dd Content-Type: text/plain; charset="UTF-8" Hi Barry, great catch, thank you! I've posted the new version . Kind regards, Greg On Tue, Sep 24, 2019 at 10:29 AM Barry Leiba wrote: > Greg, this looks good, and many thanks for that! Minor typo: > > Using STAMP over the Internet, especially > when STAMP test packets are transmitted with the destination UDP port > number from the User Ports range, the possible impact of the STAMP > test packets MUST be thoroughly analyzed. > > It should say "When using STAMP over the Internet..." > > I'll clear the DISCUSS when this is posted as a draft revision. > > Barry > > On Tue, Sep 24, 2019 at 1:19 PM Greg Mirsky wrote: > > > > Hi Barry, > > thank you for your suggestions. Based on your comments, the authors > decided to add a new Operational Consideration section: > > NEW TEXT: > > 5. Operational Considerations > > > > STAMP is intended to be used on production networks to enable the > > operator to assess service level agreements based on packet delay, > > delay variation, and loss. Using STAMP over the Internet, especially > > when STAMP test packets are transmitted with the destination UDP port > > number from the User Ports range, the possible impact of the STAMP > > test packets MUST be thoroughly analyzed. The use of STAMP for each > > case MUST be agreed by users of nodes hosting the Session-Sender and > > Session-Reflector before starting the STAMP test session. > > > > Also, the use of the well-known port number as the destination UDP > > port number in STAMP test packets transmitted by a Session-Sender > > would not impede the ability to measure performance in an Equal Cost > > Multipath environment and analysis in Section 5.3 [RFC8545] fully > > applies to STAMP. > > > > As the new section includes the discussion of using port numbers from > the User Ports range, the Security Considerations section has been updated > to avoid the duplication (please see the attached working version and the > diff). > > > > Much appreciate your comments on the updated text. > > > > Regards, > > Greg > > > > On Tue, Sep 10, 2019 at 5:51 PM Barry Leiba > wrote: > >> > >> Thanks, Greg; I look forward to it. > >> > >> b > >> > >> On Tue, Sep 10, 2019 at 8:35 PM Greg Mirsky > wrote: > >> > > >> > Hi Barry, > >> > thank you for the clarification. Yes, I agree that a new section can > state it more clearly and give sufficient examples, as you've suggested. > >> > I'll work on it and will share when it is ready. > >> > > >> > Regards, > >> > Greg > >> > > >> > On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba > wrote: > >> >> > >> >> Hi, Greg, and thanks for the response. > >> >> > >> >> I think a minor rephrasing of the requirement isn't enough, really. > >> >> As I understand it now, after other discussion, it's not that you > need > >> >> agreement from the users, but that you should put a paragraph (or > >> >> maybe a separate section, to highlight the point) that says that this > >> >> is not intended for use on the open Internet nor on production > >> >> networks, and gives examples of what it *is* intended for... perhaps > >> >> test networks, production networks during advertised maintenance > >> >> windows, that sort of thing. And then you don't need to say that the > >> >> network's users need to agree, but simply that they need to be aware > >> >> that performance testing will be happening during period X, and that > >> >> disruptions to normal network operation are possible. You'd need to > >> >> come up with text that the working group agrees with, of course, but > I > >> >> think that if you do it will address my concern as well as some of > the > >> >> others that were raised. > >> >> > >> >> Does that make sense? > >> >> > >> >> Barry > >> >> > >> >> On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky > wrote: > >> >> > > >> >> > Hi Barry, > >> >> > thank you for your pointed question. Please find my explanation > and the proposed updated below under the GIM>> tag. > >> >> > > >> >> > Regards, > >> >> > Greg > >> >> > > >> >> > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datatracker < > noreply@ietf.org> wrote: > >> >> >> > >> >> >> Barry Leiba has entered the following ballot position for > >> >> >> draft-ietf-ippm-stamp-07: Discuss > >> >> >> > >> >> >> When responding, please keep the subject line intact and reply to > all > >> >> >> email addresses included in the To and CC lines. (Feel free to > cut this > >> >> >> introductory paragraph, however.) > >> >> >> > >> >> >> > >> >> >> Please refer to > https://www.ietf.org/iesg/statement/discuss-criteria.html > >> >> >> for more information about IESG DISCUSS and COMMENT positions. > >> >> >> > >> >> >> > >> >> >> The document, along with other ballot positions, can be found > here: > >> >> >> https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > >> >> >> > >> >> >> > >> >> >> > >> >> >> > ---------------------------------------------------------------------- > >> >> >> DISCUSS: > >> >> >> > ---------------------------------------------------------------------- > >> >> >> > >> >> >> I'm sure this will be easy to either explain to me or re-phrase: > >> >> >> > >> >> >> Sections 4 and 6 both say something like "MUST be agreed by all > users of the > >> >> >> network". What does that really mean? How is it remotely > possible to get > >> >> >> agreement from all users of your network? How is it remotely > possible that > >> >> >> they could understand what you're asking them to agree to? > >> >> > > >> >> > > >> >> > GIM>> Yes, looking at the bigger picture, at the Internet rather > than only at the domain where the test will be performed makes such > condition unattainable. Would s/network/network domain where the test is > planned/ so that it reads as: > >> >> > > >> >> > ... MUST be agreed by all users on the network domain where the > test is planned ... > >> >> > > >> >> > make it clearer and the number of parties involved reasonable, > practical? > >> >> > As for what the could be the question users will be asked, I think > that it should verify whether the application that has the port number > assigned is active as the same number will be used as the destination port > number in the STAMP test. > --000000000000508a1205935265dd Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Barry,
great catch, thank you!
I've p= osted the new version.=C2=A0

Kind regards,
Greg

On Tue, Sep 24, 2019 at 10:29 AM Barry Leiba <barryleiba@computer.org> wrote:<= br>
Greg, this looks= good, and many thanks for that!=C2=A0 Minor typo:

=C2=A0 =C2=A0Using STAMP over the Internet, especially
=C2=A0 =C2=A0when STAMP test packets are transmitted with the destination U= DP port
=C2=A0 =C2=A0number from the User Ports range, the possible impact of the S= TAMP
=C2=A0 =C2=A0test packets MUST be thoroughly analyzed.

It should say "When using STAMP over the Internet..."

I'll clear the DISCUSS when this is posted as a draft revision.

Barry

On Tue, Sep 24, 2019 at 1:19 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
> Hi Barry,
> thank you for your suggestions. Based on your comments, the authors de= cided to add a new Operational Consideration section:
> NEW TEXT:
> 5.=C2=A0 Operational Considerations
>
>=C2=A0 =C2=A0 STAMP is intended to be used on production networks to en= able the
>=C2=A0 =C2=A0 operator to assess service level agreements based on pack= et delay,
>=C2=A0 =C2=A0 delay variation, and loss.=C2=A0 Using STAMP over the Int= ernet, especially
>=C2=A0 =C2=A0 when STAMP test packets are transmitted with the destinat= ion UDP port
>=C2=A0 =C2=A0 number from the User Ports range, the possible impact of = the STAMP
>=C2=A0 =C2=A0 test packets MUST be thoroughly analyzed.=C2=A0 The use o= f STAMP for each
>=C2=A0 =C2=A0 case MUST be agreed by users of nodes hosting the Session= -Sender and
>=C2=A0 =C2=A0 Session-Reflector before starting the STAMP test session.=
>
>=C2=A0 =C2=A0 Also, the use of the well-known port number as the destin= ation UDP
>=C2=A0 =C2=A0 port number in STAMP test packets transmitted by a Sessio= n-Sender
>=C2=A0 =C2=A0 would not impede the ability to measure performance in an= Equal Cost
>=C2=A0 =C2=A0 Multipath environment and analysis in Section 5.3 [RFC854= 5] fully
>=C2=A0 =C2=A0 applies to STAMP.
>
> As the new section includes the discussion of using port numbers from = the User Ports range, the Security Considerations section has been updated = to avoid the duplication (please see the attached working version and the d= iff).
>
> Much appreciate your comments on the updated text.
>
> Regards,
> Greg
>
> On Tue, Sep 10, 2019 at 5:51 PM Barry Leiba <barryleiba@computer.org> wrot= e:
>>
>> Thanks, Greg; I look forward to it.
>>
>> b
>>
>> On Tue, Sep 10, 2019 at 8:35 PM Greg Mirsky <gregimirsky@gmail.com> wrot= e:
>> >
>> > Hi Barry,
>> > thank you for the clarification. Yes, I agree that a new sect= ion can state it more clearly and give sufficient examples, as you've s= uggested.
>> > I'll work on it and will share when it is ready.
>> >
>> > Regards,
>> > Greg
>> >
>> > On Tue, Sep 10, 2019 at 5:15 PM Barry Leiba <barryleiba@computer.org= > wrote:
>> >>
>> >> Hi, Greg, and thanks for the response.
>> >>
>> >> I think a minor rephrasing of the requirement isn't e= nough, really.
>> >> As I understand it now, after other discussion, it's = not that you need
>> >> agreement from the users, but that you should put a parag= raph (or
>> >> maybe a separate section, to highlight the point) that sa= ys that this
>> >> is not intended for use on the open Internet nor on produ= ction
>> >> networks, and gives examples of what it *is* intended for= ... perhaps
>> >> test networks, production networks during advertised main= tenance
>> >> windows, that sort of thing.=C2=A0 And then you don't= need to say that the
>> >> network's users need to agree, but simply that they n= eed to be aware
>> >> that performance testing will be happening during period = X, and that
>> >> disruptions to normal network operation are possible.=C2= =A0 You'd need to
>> >> come up with text that the working group agrees with, of = course, but I
>> >> think that if you do it will address my concern as well a= s some of the
>> >> others that were raised.
>> >>
>> >> Does that make sense?
>> >>
>> >> Barry
>> >>
>> >> On Tue, Sep 10, 2019 at 5:01 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>> >> >
>> >> > Hi Barry,
>> >> > thank you for your pointed question. Please find my = explanation and the proposed updated below under the GIM>> tag.
>> >> >
>> >> > Regards,
>> >> > Greg
>> >> >
>> >> > On Wed, Sep 4, 2019 at 9:53 AM Barry Leiba via Datat= racker <noreply@ie= tf.org> wrote:
>> >> >>
>> >> >> Barry Leiba has entered the following ballot pos= ition for
>> >> >> draft-ietf-ippm-stamp-07: Discuss
>> >> >>
>> >> >> When responding, please keep the subject line in= tact and reply to all
>> >> >> email addresses included in the To and CC lines.= (Feel free to cut this
>> >> >> introductory paragraph, however.)
>> >> >>
>> >> >>
>> >> >> Please refer to = https://www.ietf.org/iesg/statement/discuss-criteria.html
>> >> >> for more information about IESG DISCUSS and COMM= ENT positions.
>> >> >>
>> >> >>
>> >> >> The document, along with other ballot positions,= can be found here:
>> >> >> https://datatracke= r.ietf.org/doc/draft-ietf-ippm-stamp/
>> >> >>
>> >> >>
>> >> >>
>> >> >> ------------------------------------------------= ----------------------
>> >> >> DISCUSS:
>> >> >> ------------------------------------------------= ----------------------
>> >> >>
>> >> >> I'm sure this will be easy to either explain= to me or re-phrase:
>> >> >>
>> >> >> Sections 4 and 6 both say something like "M= UST be agreed by all users of the
>> >> >> network".=C2=A0 What does that really mean?= =C2=A0 How is it remotely possible to get
>> >> >> agreement from all users of your network?=C2=A0 = How is it remotely possible that
>> >> >> they could understand what you're asking the= m to agree to?
>> >> >
>> >> >
>> >> > GIM>> Yes, looking at the bigger picture, at t= he Internet rather than only at the domain where the test will be performed= makes such condition unattainable. Would s/network/network domain where th= e test is planned/=C2=A0 so that it reads as:
>> >> >
>> >> > ... MUST be agreed by all users on the network domai= n where the test is planned ...
>> >> >
>> >> > make it clearer and the number of parties involved r= easonable, practical?
>> >> > As for what the could be the question users will be = asked, I think that it should verify whether the application that has the p= ort number assigned is active as the same number will be used as the destin= ation port number in the STAMP test.
--000000000000508a1205935265dd-- From nobody Tue Sep 24 13:39:53 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 51615120110; Tue, 24 Sep 2019 13:39:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.755 X-Spam-Level: X-Spam-Status: No, score=-0.755 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 nA3bp7SeWqQV; Tue, 24 Sep 2019 13:39:44 -0700 (PDT) Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 337BE12093A; Tue, 24 Sep 2019 13:39:14 -0700 (PDT) Received: by mail-lf1-x130.google.com with SMTP id u28so2440500lfc.5; Tue, 24 Sep 2019 13:39:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=pmAj3xMZm5oAKYIOnFQCLIAOZqnP/MsN04WqL0zgwSk=; b=PH7osEsf0u/XsYGG5J55k6cDKd3ZVAf2+m9+awrXUoam8JJE+56meK7cyKSZUIDj99 0+qHjmasa3GtIkU29ZoGtgRQgDZ4wxVyaWPrD79DZrLFOyRKsJdmgaQe7IjG9ZN22VxJ Tw72s6u/ZkXEcAV53pgA8fBatmTld9wn91moso7GNtJ6bHIvPTJXO95BysX3YkHr4WT0 mzJZfbT/NdBw3yyQvnVk2d/0UQhUw4PiuKXybiI9biSs/5U+Pa5ys4xIAlIbUze6G+UV /Oah+bCfeF+P8RkFWZz4+DkR5Q3BnJzqUbAYRFN9wnyNzQdeD8YXlWqLvz8tUGEgWAJJ d2qA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=pmAj3xMZm5oAKYIOnFQCLIAOZqnP/MsN04WqL0zgwSk=; b=o/r2LTFzhvzY2ffhGwsr7p+2IrtTkkCd05OEX/IT0ZvBjNkU8yMrDIjjECRdN+IzAl 6zJPyB1ba2KKDUA8E0pc+ZWhyUdsc3sSqIGhav+UmNjjpZKx0KxXhyDalLjo/ykMLGr1 dyUwmqXFyH2dJbsJd2yDOisn0I2CZCQwWLXGnVH+DWXmiIa2VedoX4IikLZnzpOP+wxE PfG0wCivoTdWzEwwQ19N+vjmRPXCBuenZL05WLQAr4AjNXls2mnAvQPtoxeRwlYh5tBk aGEbRzVCwnyoKHOOI1QyIg7njXsdmv7oRz9GaxymwSUPsor0AVp65T0cBxxBGjl5dYb2 +Cfw== X-Gm-Message-State: APjAAAXH/WINU5fsQGX3LJ2NmnS2jQ6YL7kk7BmojxTJLx0F07TTUTP5 HYzRXpFeXRWJYoRWeVYyhVI9Ux+yXwUzrrldTbI= X-Google-Smtp-Source: APXvYqxkJGbaXMo5b5PhSsxiZO3/yZ/j/kQWGqB7ZS6/MRklSwYYBNCoPjpoqigFSoaDCio98MClpipP/m1JMS9zing= X-Received: by 2002:a05:6512:14c:: with SMTP id m12mr3000596lfo.27.1569357552069; Tue, 24 Sep 2019 13:39:12 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> In-Reply-To: From: Greg Mirsky Date: Tue, 24 Sep 2019 13:39:02 -0700 Message-ID: To: Magnus Westerlund Cc: "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Content-Type: multipart/alternative; boundary="0000000000006aaeca059352876d" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 20:39:52 -0000 --0000000000006aaeca059352876d Content-Type: text/plain; charset="UTF-8" Hi Magnus, a new section, Operational Considerations, has been added to address Barry's DISCUSS: 5. Operational Considerations STAMP is intended to be used on production networks to enable the operator to assess service level agreements based on packet delay, delay variation, and loss. When using STAMP over the Internet, especially when STAMP test packets are transmitted with the destination UDP port number from the User Ports range, the possible impact of the STAMP test packets MUST be thoroughly analyzed. The use of STAMP for each case MUST be agreed by users of nodes hosting the Session-Sender and Session-Reflector before starting the STAMP test session. Also, the use of the well-known port number as the destination UDP port number in STAMP test packets transmitted by a Session-Sender would not impede the ability to measure performance in an Equal Cost Multipath environment and analysis in Section 5.3 [RFC8545] fully applies to STAMP. Would it address your concern? The new version of the draft has been published. It includes all the updates we've discussed. Much appreciate your consideration of the new version, comments, and questions. Kind regards, Greg On Mon, Sep 16, 2019 at 8:29 AM Magnus Westerlund < magnus.westerlund@ericsson.com> wrote: > On Wed, 2019-09-11 at 11:33 -0700, Greg Mirsky wrote: > > Hi Magnus, > > thank you for clarifications and further detailing your comments, > > questions. Please find my answers and notes below in-lined under the > > GIM2>> tag. > > > > Regards, > > Greg > > > > On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund < > > magnus.westerlund@ericsson.com> wrote: > > > Hi Greg, > > > > > > Thanks for the reply. See inline for my comments and response. > > > > > > > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > > Hi Magnus, > > > > thank you for the review and thoughtful, pointed questions. > > > Please > > > > find my answers in-line under GIM>> tag. > > > > > > > > Regards, > > > > Greg > > > > > > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker > > > < > > > > noreply@ietf.org> wrote: > > > > > Magnus Westerlund has entered the following ballot position for > > > > > draft-ietf-ippm-stamp-07: Discuss > > > > > > > > > > When responding, please keep the subject line intact and reply > > > to > > > > > all > > > > > email addresses included in the To and CC lines. (Feel free to > > > cut > > > > > this > > > > > introductory paragraph, however.) > > > > > > > > > > > > > > > Please refer to > > > > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > > > > for more information about IESG DISCUSS and COMMENT positions. > > > > > > > > > > > > > > > The document, along with other ballot positions, can be found > > > here: > > > > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------- > > > ---- > > > > > ----- > > > > > DISCUSS: > > > > > ------------------------------------------------------------- > > > ---- > > > > > ----- > > > > > > > > > > Two very much discussing discusses. However, I would really > > > like to > > > > > hear the > > > > > answer to these concerns before clearing. > > > > > > > > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? > > > If > > > > > there ever > > > > > would exist a need to deploy another integrity solution, even > > > if > > > > > the actual > > > > > algorithm used to construct the tag can be agreed by the > > > > > management, there > > > > > appear to exist a hard look in to use 16-byte tags. Have this > > > issue > > > > > been > > > > > considered? > > > > > > > > GIM>> Indeed, this specification defines the use of only one > > > > algorithm and only 16 bytes-long HMAC field. Your question > > > prompted > > > > the discussion among authors and we believe that in a future > > > > specification it would be feasible to extend supporting a number > > > of > > > > algorithms and different lengths of HMAC field both being defined > > > > through extension to STAMP YANG data model. > > > > > > So if I understand this (taking a discussion with Mirja about > > > keeping > > > things as simple as possible) the solution is to basically is when > > > need > > > arises define a new STAMP version, and then use YANG to coordinate > > > which version is used for the measurement. If that is a correct re- > > > interpretation of your response then I am fine with it. > > > > GIM2>> The direction from the WG was to keep the base specification > > as simple as possible (and that was the reason to split TLV > > extensions into a separate document). > > Yes, understood. > > > > > > 2. Section 6: > > > > > The possible impact of the > > > > > STAMP test packets on the network MUST be thoroughly > > > analyzed, > > > > > and > > > > > the use of STAMP for each case MUST be agreed by all users > > > on > > > > > the > > > > > network before starting the STAMP test session. > > > > > > > > > > I assume some potential issues are know, shouldn't they > > > > > really be > > > > > listed here in the security consideration to further > > > > > motivate why the > > > > > analysis needs to happen. > > > > > > > > GIM>> This is in reference to using numbers from the User range > > > as > > > > the destination port number. Would adding the reference to the > > > case > > > > of using the port numbers from the User range address your > > > concern? > > > > Or rather refer to Section 4, as it includes more discussion > > > (see > > > > below)? > > > > > > Okay, I don't really care where the discussion happens. But I don't > > > find any real discussion and listing of the concerns with using > > > user or > > > dynamic ports for STAMP Sessions? With the formulation you use, I > > > would > > > expect at least some list of potential concerns that needs to be > > > evaluated in the context of the particular usage of STAMP. > > > > GIM2>> Per Berry's suggestion, I'm adding a new section, Operational > > Considerations, to list possible scenarios and possible issues with > > using destination ports from the User range and from the Dynamic > > range. I hope to finish it in a couple days. Will share on this > > discussion thread promptly. > > Great! > > Looking forward to review it when written. > > > > > > > > > > > ------------------------------------------------------------- > > > ---- > > > > > ----- > > > > > COMMENT: > > > > > ------------------------------------------------------------- > > > ---- > > > > > ----- > > > > > > > > > > 1. Section 4: > > > > > Before using numbers from the User Ports range, the > > > > > possible impact > > > > > on the network MUST be carefully studied and agreed by all > > > users > > > > > of > > > > > the network. > > > > > > > > > > Is the above sentence missing to list an important > > > > > assumption? Is the > > > > > assumption that by using the registred destination port > > > an > > > > > operator > > > > > that sees to much STAMP traffic can simply filter it > > > out > > > > > and that way > > > > > deal with the traffic, something which is not possible > > > when > > > > > using an > > > > > locally decided port? If that is the case, this > > > assumption > > > > > should > > > > > probably be noted. > > > > > > > > GIM>> That is a very good point but our primary motivation for > > > this > > > > cautionary note (or strong warning) was that by allowing STAMP to > > > use > > > > port numbers from the User range, ports that may be already > > > assigned > > > > to protocols, creates a DDOS attack vector. As for the filtering > > > > STAMP traffic out, I think that even if the destination port is > > > one > > > > from the Dynamic range, for a relatively long test session it can > > > be > > > > filtered out. > > > > > > So if that is the only? concern then write it out. I would expect > > > that > > > the higher layer management protocol that creates a measurement > > > session > > > to actually ensure that the STAMP endpoint actually have the port > > > numbers they attempt to use. Isn't that a reasonable requirement to > > > put > > > on the solution? > > > > GIM2>> Agree with your suggestion. Will put in the new section. If > > STAMP is managed by a centralized system, whether it is proprietary > > OSS/BSS or an orchestrator that uses YANG data models, the system > > will be able to coordinate selection of port numbers on the Session- > > Sender and Session-Reflector. But some systems may use EMS or CLI and > > that is where human coordination may be required. > > > Good, then likely this is resolved when your text is ready. > > > > My thinking with the filtering out concern was that in cases where > > > one > > > runs STAMP measurement sessions, if the measurement interfer with > > > critical traffic an action for an on-path node that can actually > > > identify the STAMP traffic was to filer it out. And that may be > > > considered trivial when the well known port is used, but if a user > > > or > > > dynamic port is used, then that requries a managment system to > > > provide > > > the on-path node with the necessary information, i.e. 3/5 tuple for > > > the > > > STAMP flows. > > > > GIM2>> I think that a transit node can identify a flow as the STAMP > > flow only if the destination port is the STAMP default UDP > > destination port number, 862. In case a STAMP session has the > > destination port number as one of port numbers from the User range, > > IP/UDP encapsulation of STAMP packets would be indistinguishable from > > packets originated by the application that is assigned that port > > number. Thus, filtering out on only destination port number may > > negatively affect service, legitimate service. Because of that, I > > think that filtering will have to use more information. On the other > > hand, if the test flow does not exceed agreed rate, then any > > filtering test packets out, in my opinion, is counter-productive, as > > it hides some issues in the networks rather than letting the OAM > > tools to expose them, localize, and characterize. > > Ok. This was primarily to understand if this was in scope or not. But > it sounds like this is not really in scope for how to manage it. > > > > > > > > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? > > > Is > > > > > that a > > > > > measurment session between one specific and sender and > > > a > > > > > specific > > > > > reflector for a time duration? The defenition of the > > > > > session do matter > > > > > if one intended to enable a single sender to use > > > multiple > > > > > reflectors, > > > > > and if that can be a single session or always multiple > > > > > indepdendent > > > > > ones. Would appreciate a definition what a session is. > > > If > > > > > it is > > > > > possible to send STAMP traffic using a multicast or > > > > > broadcast address > > > > > should be made explicit. > > > > > > > > GIM>> Your interpretation is correct, STAMP session is implicitly > > > > defined as p2p. And that is what reflected in the STAMP YANG > > > model. > > > > Would the following text make it clearer: > > > > NEW TEXT: > > > > In this document, a measurement session also referred to as > > > > STAMP session, is the session between one specific Session- > > > Sender > > > > and > > > > one particular Session-Reflector for a time duration. > > > > > > Yes, please include that definition. Question would it be clearer > > > to > > > replace ".. is the session betweeen .." with ".. is the bi- > > > directional > > > packet flows between .."? > > > > GIM2>> I agree, defining a session as a session makes is somewhat > > repetitive. Thank you. > > Below is the updated text: > > In this document, a measurement session also referred to as > > STAMP session, is the bi-directional packet flow between one > > specific > > Session-Sender and one particular Session-Reflector for a time > > duration. > > Looks good to me. > > > > > > > > > 3. Section 4.1.1.: > > > > > Timestamp is eight octets long field. STAMP node MUST > > > > > support > > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > > format > > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > > support > > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > > timestamp > > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > > > > > > Is the clock source here something that may be relevant > > > or > > > > > simply > > > > > information the management functions should capture. I > > > > > think there is a > > > > > similar issue to that of RTP faced when it comes to > > > > > understand what the > > > > > timestamp actually represent and thus be used > > > correctly. > > > > > RTP clock > > > > > source specification is RFC 7273 > > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > > > > > GIM>> NTP and PTP encodings have a different interpretation of > > > the > > > > Fraction field of the Timestamp field. In my experience, PTP > > > format > > > > is native for the data plane, while NTP is more used at the > > > control > > > > plane. Original extension to TWAMP has been described in RFC > > > 8186. > > > > > > I think you missunderstood. When I talk about clock source, I am > > > actually referring to identifying the particular clock that the > > > node > > > use to derive the included timestamp from. > > > > > > And likely this is a moot point in this document where the clock > > > source > > > information belongs in the management layer, e.g. in the YANG data > > > model. > > > > GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-tlv) > > provides information about the clock synchronization protocol and the > > method by wich the timestamp has been acquired at a Session- > > Reflector. We may extend it to list the name/locatior of the master > > clock. > > Ok. sounds reasonable. > > > > > > > > > 4. Section 4.1: > > > > > Because STAMP supports symmetrical test packets, > > > STAMP > > > > > Session-Sender > > > > > packet has a minimum size of 44 octets in unauthenticated > > > mode, > > > > > see > > > > > Figure 2, and 112 octets in the authenticated mode, see > > > Figure > > > > > 4. > > > > > > > > > > The above text implies some potential for UDP payload > > > size > > > > > variability > > > > > for the STAMP packets. However, the actual definition > > > > > appear to have > > > > > fixed sizes. Can you please clarify if I have missed > > > > > something that > > > > > enables the STAMP packet to have variable size? > > > > > > > > GIM>> I think that the text can be improved by characterizing the > > > > listed sizes as "base". The variable length of a test packet in > > > STAMP > > > > is supported by using Extra Padding TLV defined in draft-ietf- > > > ippm- > > > > stamp-option-tlv. Below is the proposed update: > > > > OLD TEXT: > > > > Because STAMP supports symmetrical test packets, STAMP > > > Session- > > > > Sender > > > > packet has a minimum size of 44 octets in unauthenticated > > > mode, > > > > see > > > > Figure 2, and 112 octets in the authenticated mode, see Figure > > > 4. > > > > NEW TEXT: > > > > STAMP supports symmetrical test packets. The base STAMP > > > Session- > > > > Sender packet has a minimum size of 44 octets in > > > unauthenticated > > > > mode, see Figure 2, and 112 octets in the authenticated mode, > > > see > > > > Figure 4. The variable length of a test packet in STAMP is > > > > supported > > > > by using Extra Padding TLV defined in > > > > [I-D.ietf-ippm-stamp-option-tlv]. > > > > > > > > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > > > > moved to the Normative References list or may remain in the > > > > Informative list? > > > > > > From my perspective, the fact that optional TLV may occur following > > > the > > > base headers appears quite important. Here comes a question of > > > intention form the WG. Is it intended that one can have STAMP > > > endpoints > > > that do not even support receiving packets larger than the base? > > > In other words there will be two main versions already now, one > > > that > > > supports some TLV and can at least handle the TLV skip forward and > > > ignore the content and one that will throw a fit over the TLVs? If > > > that > > > is not the intention I think the fact that TLV's may occur should > > > be > > > moved into this specification and have it as a normative reference. > > > > GIM2>> Will move the reference to the Normative section. With TLV > > being normative, I'd expect that the intelligent implementation of > > this draft, of the base STAMP specification, will accept any valid > > STAMP packet though not process extensions. But the base STAMP > > Session-Reflector will return the base reflected packet. > > I think that is very reasonable approach. Are you close to complete the > stamp-option-tlv document, or will the missref cause any issue? > > > > I guess the answer is that you have backwards comaptibility reasons > > > for > > > not allowing TLVs at all in some sessions, or? > > > > GIM2>> Yes, that and the principle "keep it simple". > > Thanks, > > To me it looks like with some text changes all my issues are addressed. > > Cheers > > Magnus Westerlund > > > ---------------------------------------------------------------------- > Network Architecture & Protocols, Ericsson Research > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Torshamnsgatan 23 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > > --0000000000006aaeca059352876d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Magnus,
a new section, Operational= Considerations, has been added to address Barry's DISCUSS:
<= br>
5.=C2=A0 Operational Considerations

=C2=A0 =C2=A0STAMP= is intended to be used on production networks to enable the
=C2=A0 =C2= =A0operator to assess service level agreements based on packet delay,
= =C2=A0 =C2=A0delay variation, and loss.=C2=A0 When using STAMP over the Int= ernet,
=C2=A0 =C2=A0especially when STAMP test packets are transmitted w= ith the
=C2=A0 =C2=A0destination UDP port number from the User Ports ran= ge, the possible
=C2=A0 =C2=A0impact of the STAMP test packets MUST be t= horoughly analyzed.=C2=A0 The
=C2=A0 =C2=A0use of STAMP for each case MU= ST be agreed by users of nodes hosting
=C2=A0 =C2=A0the Session-Sender a= nd Session-Reflector before starting the STAMP
=C2=A0 =C2=A0test session= .

=C2=A0 =C2=A0Also, the use of the well-known port number as the de= stination UDP
=C2=A0 =C2=A0port number in STAMP test packets transmitted= by a Session-Sender
=C2=A0 =C2=A0would not impede the ability to measur= e performance in an Equal Cost
=C2=A0 =C2=A0Multipath environment and an= alysis in Section 5.3 [RFC8545] fully
=C2=A0 =C2=A0applies to STAMP.
=

Would it address your concern?

The new version of the draft has been published. It includes all= the updates we've discussed.

Much appreciate = your consideration of the new version, comments, and questions.
<= br>
Kind regards,
Greg

On Mon, Sep 16, 2019 at 8:2= 9 AM Magnus Westerlund <magnus.westerlund@ericsson.com> wrote:
On Wed, 2019-09-11 at 11:33 -0700, Greg Mi= rsky wrote:
> Hi Magnus,
> thank you for clarifications and further detailing your comments,
> questions. Please find my answers and notes below in-lined under the > GIM2>> tag.
>
> Regards,
> Greg
>
> On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund <
> ma= gnus.westerlund@ericsson.com> wrote:
> > Hi Greg,
> >
> > Thanks for the reply. See inline for my comments and response. > >
> >
> > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote:
> > > Hi Magnus,
> > > thank you for the review and thoughtful, pointed questions.<= br> > > Please
> > > find my answers in-line under GIM>> tag.
> > >
> > > Regards,
> > > Greg
> > >
> > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatra= cker
> > <
> > > norepl= y@ietf.org> wrote:
> > > > Magnus Westerlund has entered the following ballot posi= tion for
> > > > draft-ietf-ippm-stamp-07: Discuss
> > > >
> > > > When responding, please keep the subject line intact an= d reply
> > to
> > > > all
> > > > email addresses included in the To and CC lines. (Feel = free to
> > cut
> > > > this
> > > > introductory paragraph, however.)
> > > >
> > > >
> > > > Please refer to
> > > > https://www.ietf.org/ie= sg/statement/discuss-criteria.html
> > > > for more information about IESG DISCUSS and COMMENT pos= itions.
> > > >
> > > >
> > > > The document, along with other ballot positions, can be= found
> > here:
> > > > https://datatracker.ietf.= org/doc/draft-ietf-ippm-stamp/
> > > >
> > > >
> > > >
> > > > -------------------------------------------------------= ------
> > ----
> > > > -----
> > > > DISCUSS:
> > > > -------------------------------------------------------= ------
> > ----
> > > > -----
> > > >
> > > > Two very much discussing discusses. However, I would re= ally
> > like to
> > > > hear the
> > > > answer to these concerns before clearing.
> > > >
> > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard= coded?
> > If
> > > > there ever
> > > > would exist a need to deploy another integrity solution= , even
> > if
> > > > the actual
> > > > algorithm used to construct the tag can be agreed by th= e
> > > > management, there
> > > > appear to exist a hard look in to use 16-byte tags. Hav= e this
> > issue
> > > > been
> > > > considered?
> > >
> > > GIM>> Indeed, this specification defines the use of on= ly one
> > > algorithm and only 16 bytes-long HMAC field. Your question > > prompted
> > > the discussion among authors and we believe that in a future=
> > > specification it would be feasible to extend supporting a nu= mber
> > of
> > > algorithms and different lengths of HMAC field both being de= fined
> > > through extension to STAMP YANG data model.
> >
> > So if I understand this (taking a discussion with Mirja about
> > keeping
> > things as simple as possible) the solution is to basically is whe= n
> > need
> > arises define a new STAMP version, and then use YANG to coordinat= e
> > which version is used for the measurement. If that is a correct r= e-
> > interpretation of your response then I am fine with it.
>
> GIM2>> The direction from the WG was to keep the base specificat= ion
> as simple=C2=A0 as possible (and that was the reason to split TLV
> extensions into a separate document).

Yes, understood.

> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 6:
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The possible impact of= the
> > > >=C2=A0 =C2=A0 STAMP test packets on the network MUST be = thoroughly
> > analyzed,
> > > > and
> > > >=C2=A0 =C2=A0 the use of STAMP for each case MUST be agr= eed by all users
> > on
> > > > the
> > > >=C2=A0 =C2=A0 network before starting the STAMP test ses= sion.
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I assume some potentia= l issues are know, shouldn't they
> > > > really be
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0listed here in the sec= urity consideration to further
> > > > motivate why the
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0analysis needs to happ= en.
> > >
> > > GIM>> This is in reference to using numbers from the U= ser range
> > as
> > > the destination port number. Would adding the reference to t= he
> > case
> > > of using the port numbers from the User range address your > > concern?
> > > Or rather refer to Section 4, as it includes more discussion=
> > (see
> > > below)?
> >
> > Okay, I don't really care where the discussion happens. But I= don't
> > find any real discussion and listing of the concerns with using > > user or
> > dynamic ports for STAMP Sessions? With the formulation you use, I=
> > would
> > expect at least some list of potential concerns that needs to be<= br> > > evaluated in the context of the particular usage of STAMP.
>
> GIM2>> Per Berry's suggestion, I'm adding a new section,= Operational
> Considerations, to list possible scenarios and possible issues with > using destination ports from the User range and from the Dynamic
> range. I hope to finish it in a couple days. Will share on this
> discussion thread promptly.

Great!

Looking forward to review it when written.

> > > >
> > > > -------------------------------------------------------= ------
> > ----
> > > > -----
> > > > COMMENT:
> > > > -------------------------------------------------------= ------
> > ----
> > > > -----
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01. Section 4:
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Before using numbers f= rom the User Ports range, the
> > > > possible impact
> > > >=C2=A0 =C2=A0 on the network MUST be carefully studied a= nd agreed by all
> > users
> > > > of
> > > >=C2=A0 =C2=A0 the network.
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the above sentence = missing to list an important
> > > > assumption? Is the
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0assumption that by usi= ng the registred destination port
> > an
> > > > operator
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that sees to much STAM= P traffic can simply filter it
> > out
> > > > and that way
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0deal with the traffic,= something which is not possible
> > when
> > > > using an
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0locally decided port? = If that is the case, this
> > assumption
> > > > should
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably be noted.
> > >
> > > GIM>> That is a very good point but our primary motiva= tion for
> > this
> > > cautionary note (or strong warning) was that by allowing STA= MP to
> > use
> > > port numbers from the User range, ports that may be already<= br> > > assigned
> > > to protocols, creates a DDOS attack vector. As for the filte= ring
> > > STAMP traffic out, I think that even if the destination port= is
> > one
> > > from the Dynamic range, for a relatively long test session i= t can
> > be
> > > filtered out.
> >
> > So if that is the only? concern then write it out. I would expect=
> > that
> > the higher layer management protocol that creates a measurement > > session
> > to actually ensure that the STAMP endpoint actually have the port=
> > numbers they attempt to use. Isn't that a reasonable requirem= ent to
> > put
> > on the solution?
>
> GIM2>> Agree with your suggestion. Will put in the new section. = If
> STAMP is managed by a centralized system, whether it is proprietary > OSS/BSS or an orchestrator that uses YANG data models, the system
> will be able to coordinate selection of port numbers on the Session- > Sender and Session-Reflector. But some systems may use EMS or CLI and<= br> > that is where human coordination may be required.


Good, then likely this is resolved when your text is ready.

> > My thinking with the filtering out concern was that in cases wher= e
> > one
> > runs STAMP measurement sessions, if the measurement interfer with=
> > critical traffic an action for an on-path node that can actually<= br> > > identify the STAMP traffic was to filer it out. And that may be > > considered trivial when the well known port is used, but if a use= r
> > or
> > dynamic port is used, then that requries a managment system to > > provide
> > the on-path node with the necessary information, i.e. 3/5 tuple f= or
> > the
> > STAMP flows.
>
> GIM2>> I think that a transit node can identify a flow as the ST= AMP
> flow only if the destination port is the STAMP default UDP
> destination port number, 862. In case a STAMP session has the
> destination port number as one of port numbers from the User range, > IP/UDP encapsulation of STAMP packets would be indistinguishable from<= br> > packets originated by the application that is assigned that port
> number. Thus, filtering out on only destination port number may
> negatively affect service, legitimate service. Because of that, I
> think that filtering will have to use more information. On the other > hand, if the test flow does not exceed agreed rate, then any
> filtering test packets out, in my opinion, is counter-productive, as > it hides some issues in the networks rather than letting the OAM
> tools to expose them, localize, and characterize.

Ok. This was primarily to understand if this was in scope or not. But
it sounds like this is not really in scope for how to manage it.

> >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 3 and 4, an= d 4.1.1: What is a STAMP Session?
> > Is
> > > > that a
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0measurment session bet= ween one specific and sender and
> > a
> > > > specific
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reflector for a time d= uration?=C2=A0 The defenition of the
> > > > session do matter
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0if one intended to ena= ble a single sender to use
> > multiple
> > > > reflectors,
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and if that can be a s= ingle session or always multiple
> > > > indepdendent
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ones. Would appreciate= a definition what a session is.
> > If
> > > > it is
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0possible to send STAMP= traffic using a multicast or
> > > > broadcast address
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0should be made explici= t.
> > >
> > > GIM>> Your interpretation is correct, STAMP session is= implicitly
> > > defined as p2p. And that is what reflected in the STAMP YANG=
> > model.
> > > Would the following text make it clearer:
> > > NEW TEXT:
> > >=C2=A0 =C2=A0 In this document, a measurement session also re= ferred to as
> > >=C2=A0 =C2=A0 STAMP session, is the session between one speci= fic Session-
> > Sender
> > > and
> > >=C2=A0 =C2=A0 one particular Session-Reflector for a time dur= ation.
> >
> > Yes, please include that definition. Question would it be clearer=
> > to
> > replace ".. is the session betweeen .." with ".. i= s the bi-
> > directional
> > packet flows between .."?
>
> GIM2>> I agree, defining a session as a session makes is somewha= t
> repetitive. Thank you.
> Below is the updated text:
>=C2=A0 =C2=A0 In this document, a measurement session also referred to = as
>=C2=A0 =C2=A0 STAMP session, is the bi-directional packet flow between = one
> specific
>=C2=A0 =C2=A0 Session-Sender and one particular Session-Reflector for a= time
>=C2=A0 =C2=A0 duration.

Looks good to me.

> >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.=C2=A0 Section 4.1.1.:
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Timestamp is eight oct= ets long field.=C2=A0 STAMP node MUST
> > > > support
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0Network Time Protocol (NTP) v= ersion 4 64-bit timestamp
> > format
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC5905], the format used in= [RFC5357].=C2=A0 STAMP node MAY
> > > > support
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0IEEE 1588v2 Precision Time Pr= otocol truncated 64-bit
> > > > timestamp
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0format [IEEE.1588.2008], the = format used in [RFC8186].
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the clock source he= re something that may be relevant
> > or
> > > > simply
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0information the manage= ment functions should capture. I
> > > > think there is a
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0similar issue to that = of RTP faced when it comes to
> > > > understand what the
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0timestamp actually rep= resent and thus be used
> > correctly.
> > > > RTP clock
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0source specification i= s RFC 7273
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(https= ://datatracker.ietf.org/doc/rfc7273/)
> > >
> > > GIM>> NTP and PTP encodings have a different interpret= ation of
> > the
> > > Fraction field of the Timestamp field. In my experience, PTP=
> > format
> > > is native for the data plane, while NTP is more used at the<= br> > > control
> > > plane. Original extension to TWAMP has been described in RFC=
> > 8186.
> >
> > I think you missunderstood. When I talk about clock source, I am<= br> > > actually referring to identifying the particular clock that the > > node
> > use to derive the included timestamp from.
> >
> > And likely this is a moot point in this document where the clock<= br> > > source
> > information belongs in the management layer, e.g. in the YANG dat= a
> > model.
>
> GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-t= lv)
> provides information about the clock synchronization protocol and the<= br> > method by wich the timestamp has been acquired at a Session-
> Reflector. We may extend it to list the name/locatior of the master > clock.

Ok. sounds reasonable.

> >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04. Section 4.1:
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Because STAMP = supports symmetrical test packets,
> > STAMP
> > > > Session-Sender
> > > >=C2=A0 =C2=A0 packet has a minimum size of 44 octets in = unauthenticated
> > mode,
> > > > see
> > > >=C2=A0 =C2=A0 Figure 2, and 112 octets in the authentica= ted mode, see
> > Figure
> > > > 4.
> > > >
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The above text implies= some potential for UDP payload
> > size
> > > > variability
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0for the STAMP packets.= However, the actual definition
> > > > appear to have
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0fixed sizes. Can you p= lease clarify if I have missed
> > > > something that
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0enables the STAMP pack= et to have variable size?
> > >
> > > GIM>> I think that the text can be improved by charact= erizing the
> > > listed sizes as "base". The variable length of a t= est packet in
> > STAMP
> > > is supported by using Extra Padding TLV defined in draft-iet= f-
> > ippm-
> > > stamp-option-tlv. Below is the proposed update:
> > > OLD TEXT:
> > >=C2=A0 =C2=A0 Because STAMP supports symmetrical test packets= , STAMP
> > Session-
> > > Sender
> > >=C2=A0 =C2=A0 packet has a minimum size of 44 octets in unaut= henticated
> > mode,
> > > see
> > >=C2=A0 =C2=A0 Figure 2, and 112 octets in the authenticated m= ode, see Figure
> > 4.
> > > NEW TEXT:
> > >=C2=A0 =C2=A0 STAMP supports symmetrical test packets.=C2=A0 = The base STAMP
> > Session-
> > >=C2=A0 =C2=A0 Sender packet has a minimum size of 44 octets i= n
> > unauthenticated
> > >=C2=A0 =C2=A0 mode, see Figure 2, and 112 octets in the authe= nticated mode,
> > see
> > >=C2=A0 =C2=A0 Figure 4.=C2=A0 The variable length of a test p= acket in STAMP is
> > > supported
> > >=C2=A0 =C2=A0 by using Extra Padding TLV defined in
> > >=C2=A0 =C2=A0 [I-D.ietf-ippm-stamp-option-tlv].
> > >
> > > With the new reference, should I-D.ietf-ippm-stamp-option-tl= v be
> > > moved to the Normative References list or may remain in the<= br> > > > Informative list?
> >
> > From my perspective, the fact that optional TLV may occur followi= ng
> > the
> > base headers appears quite important. Here comes a question of > > intention form the WG. Is it intended that one can have STAMP
> > endpoints
> > that do not even support receiving packets larger than the base? =
> > In other words there will be two main versions already now, one > > that
> > supports some TLV and can at least handle the TLV skip forward an= d
> > ignore the content and one that will throw a fit over the TLVs? I= f
> > that
> > is not the intention I think the fact that TLV's may occur sh= ould
> > be
> > moved into this specification and have it as a normative referenc= e.
>
> GIM2>> Will move the reference to the Normative section. With TL= V
> being normative, I'd expect that the intelligent implementation of=
> this draft, of the base STAMP specification, will accept any valid
> STAMP packet though not process extensions. But the base STAMP
> Session-Reflector will return the base reflected packet.=C2=A0

I think that is very reasonable approach. Are you close to complete the
stamp-option-tlv document, or will the missref cause any issue?

> > I guess the answer is that you have backwards comaptibility reaso= ns
> > for
> > not allowing TLVs at all in some sessions, or?
>
> GIM2>> Yes, that and the principle "keep it simple". <= br>
Thanks,

To me it looks like with some text changes all my issues are addressed.

Cheers

Magnus Westerlund


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Network Architecture & Protocols, Ericsson Research
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----------------------------------------------------------------------


--0000000000006aaeca059352876d-- From nobody Tue Sep 24 15:29:28 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 03DD3120845; Tue, 24 Sep 2019 15:29:21 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.596 X-Spam-Level: X-Spam-Status: No, score=-0.596 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_COMMENT_SAVED_URL=1.391, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_HTML_ATTACH=0.01, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 eaWocT_6Ja1U; Tue, 24 Sep 2019 15:29:13 -0700 (PDT) Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CA6C01200F7; Tue, 24 Sep 2019 15:29:12 -0700 (PDT) Received: by mail-lj1-x22b.google.com with SMTP id n14so3522553ljj.10; Tue, 24 Sep 2019 15:29:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=PjxLqp9ClWAPn0XmRwb6WoLUmnNnVPySHihbfgyJRoA=; b=K+oXx0bq/gJqlWjpjWOsWsbHBcT3YTEpo5MRjMXx2B2Dv/kPjjlDFE7HSNuEVkBONO 7ggTBUQfFWwSVlV2Wxaa6Sba1bVNy4FIY0bWu03958Php8E6TnmCek8vX9LbSfgqH6/g DLxgeXTF4rhqifBr5ClGAt87+PFfoN2wi2Qjkj08L6Fc0ZKw/Lfy+VU90Xl+PM83ilPJ SRCjDabsMmYj+Vmt/FfOBJSRpFDS/VlWMWLRtvQK5F+rkc2A+dOQGpvDklbibWbJWLEC 9f9tQ0tGq7zx6CMSSiUc7amKoqyt52sJjvB9DfvKJFYoKEBw0QlDCXLiXvhv2CRT36Fm IQgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=PjxLqp9ClWAPn0XmRwb6WoLUmnNnVPySHihbfgyJRoA=; b=jkloTIW6b/kpg+MIHi/sJUckYBq0nijOZonDjt01wiAB85HWcMiADKdojO3pVjbfQM 4Qax1X6F47Dptp7y8IC3AwjbnE+Tx5ZbjuABKloEeDeM3uic/gt7pkdHEO1EaBjGDd2Y aqeRkvqpDX94Jgd+4A8ADsnrFX6hcLhzlNRfUl1GGlI7/V+0DbkANFBmabAElWrUTMqq clIyhiYV1/ovcjdsp2RKoxIC3vVFyNuSXTzXLx1BtEOWjeWRYsnZd3cfDuFRjt43yrW6 fp+0duumXjTNfFvS0EfeFdklCVzZv/hFH+qsUE+kllmSpjtDKf2lmdR/uSoRxAwk5KiT XWYQ== X-Gm-Message-State: APjAAAWR2IC8LirBJqthJqhHHXarg3zWHCIvPEmoXtEPUTAOcb14P0I+ ClYsUezGpxtdTs3Igeev83RK+AKexP2lYwwohS4= X-Google-Smtp-Source: APXvYqzctD9NgxpqmJm4y6n+P3NQ+E4B1tmairCW+Db+RvmL1IaDoT2aNxbb0hD9yjka4tMYrnlDFTsJbk4TcTg3Th0= X-Received: by 2002:a2e:7d19:: with SMTP id y25mr3568331ljc.177.1569364150368; Tue, 24 Sep 2019 15:29:10 -0700 (PDT) MIME-Version: 1.0 References: <156764791626.22774.7572696173575309052.idtracker@ietfa.amsl.com> In-Reply-To: <156764791626.22774.7572696173575309052.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Tue, 24 Sep 2019 15:28:59 -0700 Message-ID: To: Roman Danyliw Cc: The IESG , draft-ietf-ippm-stamp@ietf.org, Tal Mizrahi , IPPM Chairs , IETF IPPM WG Content-Type: multipart/mixed; boundary="000000000000b5365605935410fa" Archived-At: Subject: Re: [ippm] Roman Danyliw's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Tue, 24 Sep 2019 22:29:21 -0000 --000000000000b5365605935410fa Content-Type: multipart/alternative; boundary="000000000000b5365405935410f8" --000000000000b5365405935410f8 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Roman, thank you for your review of the STAMP draft and my apologies for the delayed response. Through discussions with Barry and Magnus, we've updated -07 version and just published the new one . Please find my answers to your questions, proposed updates in-line below and tagged GIM>>. Attached, please find the new working version and the diff between versions -07 and -09 (the new working version). Kind regards, Greg On Wed, Sep 4, 2019 at 6:45 PM Roman Danyliw via Datatracker < noreply@ietf.org> wrote: > Roman Danyliw has entered the following ballot position for > draft-ietf-ippm-stamp-07: Discuss > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- > > (1) Section 4.3. The text does not explicitly state the data on which th= e > HMAC > is computed (i.e., bytes 1 to the end of the last MBZ field of the > message?) > GIM>> Yes, the intention is to cover the whole STAMP packet as presented in the draft for Session-Sender and Session-Reflector. Would adding the following sentence make it clear: In the Authenticated mode, HMAC covers the first six blocks (96 octets). > > (2) Section 6. Per =E2=80=9CIn general, all the security considerations = related to > TWAMP-Test, discussed in [RFC5357] apply to STAMP.=E2=80=9D, what exact g= uidance is > relevant here: > > -- Section 6 (Security Considerations) of RFC5357 says follow the guidanc= e > of > RFC4656 and guidance on the OWAMP Server-Greeting messages, only the form= er > seems relevant > > -- Section 6 (Security Considerations) of RFC4656 has: > > Section 6.1 which discusses authenticated and encrypted mode of OWAMP; bu= t > STAMP has no encrypted mode. The claims about authenticate mode seem to = be > similar to OWAMP, but that=E2=80=99s not explicitly said > > Section 6.2 discusses DoS, seems to have some related guidance but also > discusses TCP handshakes > > Section 6.3 discusses covert channels, this seems relevant > > Section 6.4 seems to discuss key management that section 4.3 of this draf= t > seems to suggest is out of scope > > Section 6.5 seems to provide guidance on resource provisioning but uses t= he > KeyID primitive that doesn=E2=80=99t appear present in this draft > > [please review the other sections too ...] > GIM>> Much appreciate your thorough analysis. Indeed, much of discussion in RFC 4656 was centered on the security of the control plane, OWAMP-Control, and is not relevant in case of STAMP. Thus the first sentence in the Security Considerations section has been replaced with the new paragraph as below: OLD TEXT: In general, all the security considerations related to TWAMP-Test, discussed in [RFC5357] apply to STAMP. NEW TEXT: [RFC5357] does not identify security considerations specific to TWAMP-Test but refers to security considerations identified for OWAMP in [RFC4656]. Since both OWAMP and TWAMP include control plane and data plane components, only security considerations related to OWAMP- Test, discussed in Sections 6.2, 6.3 [RFC4656] apply to STAMP. > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > I support Barry Leiba=E2=80=99s DISCUSS. > GIM>> The new section, Operational Considerations, has been added in -08 version to address Barry's DISCUSS. > > I also support Magnus Westerlund=E2=80=99s DISCUSS. See #4. > > (2) Section 4.1.1. The sequence number is defined in terms of a =E2=80= =9Cnew > session=E2=80=9D. > However, I couldn=E2=80=99t find the precise definition of a =E2=80=9Cse= ssion=E2=80=9D =E2=80=93 how is > new > one initiated? terminated? > GIM>> Per discussion with Magnus, defined session as follows: In this document, a measurement session also referred to as STAMP session, is the bi-directional packet flow between one specific Session-Sender and one particular Session-Reflector for a time duration. > > (3) Section 4.2.1. Per Session-Sender TTL, this field is defined, the > guidance > on generating its value is clear, but its use is not explained. > GIM>> The operations on the Sender TTL in STAMP are the same as defined in RFC 5357. There's no specific performance metric associated with the value in the Sender TTL field. Some implementations may use it to monitor the stability of the path from the Session-Sender to the Session-Reflector. I'd imagine that there could be other ways to use it. > > (4) Section 4.3. Related question to Magnus Westerlund=E2=80=99s DISCUSS= , what is > the > planned approach for crypto agility? > > (5) Section 4.3. Per, =E2=80=9CHMAC uses its own key, and the definition= of the > mechanism to distribute the HMAC key is outside the scope of this > specification.=E2=80=9D > > -- What is being suggested by =E2=80=9Cuses its own key=E2=80=9D? > GIM>> The intention was to differentiate from the procedure described in Section 4.2 Integrity Protection (HMAC) in RFC 4656 how HMAC Session-key is communicated using the control plane and then HMAC key can be derived based on HMAC Session-key. Would you suggest changed wording? > > -- Is it expected that each Session-Sender/Reflector pair would have a > unique > key? > GIM>> Ultimately, yes. Each pair of Session-Sender and Session-Reflector may be using a unique key. > > -- Recommend being clearer on what=E2=80=99s out of scope, perhaps someth= ing on the > order of: s/=E2=80=A6 the definition of the mechanism to distribute the H= MAC key is > outside the scope of this specification./ > =E2=80=A6 key management and the mechanisms to distribute the HMAC key is= outside > the > scope of this specification.=E2=80=9D > GIM>> Thank you for the suggested text. Applied in the new working version: HMAC uses its own key; key management and the mechanisms to distribute the HMAC key is outside the scope of this specification. > > (5) Section 4.3. Thanks for responded to Russ Housley=E2=80=99s SECDIR r= eview and > proposing the new Section 4.3 and 4.4. It provides helpful clarity. > > (6) Editorial Nits > -- Section 3. I didn=E2=80=99t understand the title of =E2=80=98Softwari= zation of > Performance > Management=E2=80=99. The text of the section seems to simply describe th= e > elements of > Figure 1 and suggests a few ways to configure the these elements. > GIM>> Re-named the section to "Operation and Management of Performance Measurement Based on STAMP". Is the new title closer to the content of the section? > > -- Section 4. Typo. s/MUST use received/MUST received/ > GIM>> Thank you for catching it. Applied in the working version: An implementation of STAMP Session-Reflector by default MUST receive STAMP test packets on UDP port 862. > > > -- Section 6. Editorial. s/Load of STAMP test packets/The load of the > STAMP > test packets/ > GIM>> Thank you. Applied. --000000000000b5365405935410f8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Roman,
thank you for your review o= f the STAMP draft and my apologies for the delayed response.
Thro= ugh discussions with Barry and Magnus, we've updated -07 version and ju= st published the new one. Please find my answers to your questions, pro= posed updates in-line below and tagged GIM>>.
Attached, ple= ase find the new working version and the diff between versions -07 and -09 = (the new working version).

Kind regards,
Greg

On Wed, Sep 4, 2019 at 6:45 PM Roman Danyliw via Datatracker <= ;noreply@ietf.org> wrote:
Roman Danyliw has ente= red the following ballot position for
draft-ietf-ippm-stamp-07: Discuss

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/s= tatement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-i= ppm-stamp/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

(1) Section 4.3.=C2=A0 The text does not explicitly state the data on which= the HMAC
is computed (i.e., bytes 1 to the end of the last MBZ field of the message?= )
GIM>> Yes, the intention is to cover the whole= STAMP packet as presented in the draft for Session-Sender and Session-Refl= ector. Would adding the following sentence make it clear:
In the = Authenticated mode, HMAC covers the first six blocks (96 octets).=C2=A0

(2) Section 6.=C2=A0 Per =E2=80=9CIn general, all the security consideratio= ns related to
TWAMP-Test, discussed in [RFC5357] apply to STAMP.=E2=80=9D, what exact gui= dance is
relevant here:

-- Section 6 (Security Considerations) of RFC5357 says follow the guidance = of
RFC4656 and guidance on the OWAMP Server-Greeting messages, only the former=
seems relevant

-- Section 6 (Security Considerations) of RFC4656 has:

Section 6.1 which discusses authenticated and encrypted mode of OWAMP; but<= br> STAMP has no encrypted mode.=C2=A0 The claims about authenticate mode seem = to be
similar to OWAMP, but that=E2=80=99s not explicitly said

Section 6.2 discusses DoS, seems to have some related guidance but also
discusses TCP handshakes

Section 6.3 discusses covert channels, this seems relevant

Section 6.4 seems to discuss key management that section 4.3 of this draft<= br> seems to suggest is out of scope

Section 6.5 seems to provide guidance on resource provisioning but uses the=
KeyID primitive that doesn=E2=80=99t appear present in this draft

[please review the other sections too ...]
GIM>>= Much appreciate your thorough analysis. Indeed, much of discussion in RFC = 4656 was centered on the security of the control plane, OWAMP-Control, and = is not relevant in case of STAMP. Thus the first sentence in the Security C= onsiderations section has been replaced with the new paragraph as below:
OLD TEXT:
=C2=A0 =C2=A0In general, all the security consi= derations related to TWAMP-Test,
=C2=A0 =C2=A0discussed in [RFC5357] app= ly to STAMP.=C2=A0
NEW TEXT:
=C2=A0 =C2=A0[RFC5357]= does not identify security considerations specific to
=C2=A0 =C2=A0TWAM= P-Test but refers to security considerations identified for OWAMP
=C2=A0= =C2=A0in [RFC4656].=C2=A0 Since both OWAMP and TWAMP include control plane= and
=C2=A0 =C2=A0data plane components, only security considerations re= lated to OWAMP-
=C2=A0 =C2=A0Test, discussed in Sections 6.2, 6.3 [RFC46= 56] apply to STAMP.


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

I support Barry Leiba=E2=80=99s DISCUSS.
GIM>> T= he new section, Operational Considerations, has been added in -08 version t= o address Barry's DISCUSS.=C2=A0

I also support Magnus Westerlund=E2=80=99s DISCUSS.=C2=A0 See #4.

(2) Section 4.1.1.=C2=A0 The sequence number is defined in terms of a =E2= =80=9Cnew session=E2=80=9D.
=C2=A0However, I couldn=E2=80=99t find the precise definition of a =E2=80= =9Csession=E2=80=9D =E2=80=93 how is new
one initiated?=C2=A0 terminated?
GIM>> Per discu= ssion with Magnus, defined session as follows:
=C2=A0 =C2=A0In th= is document, a measurement session also referred to as
=C2=A0 =C2=A0STAM= P session, is the bi-directional packet flow between one specific
=C2=A0= =C2=A0Session-Sender and one particular Session-Reflector for a time
= =C2=A0 =C2=A0duration.

(3) Section 4.2.1.=C2=A0 Per Session-Sender TTL, this field is defined, the= guidance
on generating its value is clear, but its use is not explained.
GIM>> The operations on the Sender TTL in STAMP are the sam= e as defined in RFC 5357. There's no specific performance metric associ= ated with the value in the Sender TTL field. Some implementations may use i= t to monitor the stability of the path from the Session-Sender to the Sessi= on-Reflector. I'd imagine that there could be other ways to use it.

(4) Section 4.3.=C2=A0 Related question to Magnus Westerlund=E2=80=99s DISC= USS, what is the
planned approach for crypto agility?

(5) Section 4.3.=C2=A0 Per, =E2=80=9CHMAC uses its own key, and the definit= ion of the
mechanism to distribute the HMAC key is outside the scope of this
specification.=E2=80=9D

-- What is being suggested by =E2=80=9Cuses its own key=E2=80=9D?
GIM>> The intention was to differentiate from the procedu= re described in Section 4.2 Integrity Protection (HMAC) in RFC 4656 how HMA= C Session-key is communicated using the control plane and then HMAC key can= be derived based on HMAC Session-key. Would you suggest changed wording?

-- Is it expected that each Session-Sender/Reflector pair would have a uniq= ue
key?
GIM>> Ultimately, yes. Each pair of Session= -Sender and Session-Reflector may be using a unique key.=C2=A0

-- Recommend being clearer on what=E2=80=99s out of scope, perhaps somethin= g on the
order of: s/=E2=80=A6 the definition of the mechanism to distribute the HMA= C key is
outside the scope of this specification./

=E2=80=A6 key management and the mechanisms to distribute the HMAC key is o= utside the
scope of this specification.=E2=80=9D
GIM>> Than= k you for the suggested text. Applied in the new working version:
=C2=A0 =C2=A0HMAC uses its own key; key management and
=C2=A0 =C2=A0the= mechanisms to distribute the HMAC key is outside the scope of
=C2=A0 =C2=A0this specification.=C2=A0

(5) Section 4.3.=C2=A0 Thanks for responded to Russ Housley=E2=80=99s SECDI= R review and
proposing the new Section 4.3 and 4.4.=C2=A0 It provides helpful clarity.
(6) Editorial Nits
-- Section 3.=C2=A0 I didn=E2=80=99t understand the title of =E2=80=98Softw= arization of Performance
Management=E2=80=99.=C2=A0 The text of the section seems to simply describe= the elements of
Figure 1 and suggests a few ways to configure the these elements.
GIM>> Re-named the section to "Operation and Managem= ent of Performance Measurement Based on STAMP". Is the new title close= r to the content of the section?=C2=A0

-- Section 4.=C2=A0 Typo.=C2=A0 s/MUST use received/MUST received/
GIM>> Thank you for catching it. Applied in the working = version:
=C2=A0 =C2=A0An implementation
=C2=A0 =C2=A0of STAM= P Session-Reflector by default MUST receive STAMP test packets
=C2=A0 = =C2=A0on UDP port 862.

-- Section 6.=C2=A0 Editorial.=C2=A0 s/Load of STAMP test packets/The load = of the STAMP
test packets/
GIM>> Thank you. Applied.=C2=A0
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-0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.201 X-Spam-Level: X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-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 U8jHOSt8fK1C for ; Tue, 24 Sep 2019 23:36:35 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (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 D9358120041 for ; Tue, 24 Sep 2019 23:36:34 -0700 (PDT) Received: from lhreml701-cah.china.huawei.com (unknown [172.18.7.108]) by Forcepoint Email with ESMTP id 6359F6A7794C0E8D260E for ; Wed, 25 Sep 2019 07:36:32 +0100 (IST) Received: from NKGEML414-HUB.china.huawei.com (10.98.56.75) by lhreml701-cah.china.huawei.com (10.201.108.42) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 25 Sep 2019 07:36:31 +0100 Received: from NKGEML515-MBX.china.huawei.com ([fe80::a54a:89d2:c471:ff]) by nkgeml414-hub.china.huawei.com ([10.98.56.75]) with mapi id 14.03.0439.000; Wed, 25 Sep 2019 14:36:28 +0800 From: Tianran Zhou To: "Frank Brockners (fbrockne)" , Tom Herbert CC: "ippm@ietf.org" Thread-Topic: In-situ OAM Data Type Extension Thread-Index: AdVzZ7Gfd6262M0xTaqtGX5AFwofPA== Date: Wed, 25 Sep 2019 06:36:27 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.156.116] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [ippm] In-situ OAM Data Type Extension X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 06:36:36 -0000 Hi Frank, I am revisiting the mailing list. And I am interesting about Tom's discussi= on on IOAM Data Type Extension. https://mailarchive.ietf.org/arch/msg/ippm/cp0E8-D0XbgTBy_3Bf6E21z00EA You had the following reply: "* 24 bits Trace type=20 Per your suggestion, reserving a bit to allow for future scalability makes = sense - and bit 23 would be an obvious choice; which would in turn mean tha= t we'd need to assign a different bit for checksum complement. If everyone = else is fine with this change, we can include this change in -07." We also had a draft to address the same issue. https://tools.ietf.org/html/draft-song-ippm-ioam-data-extension-01 I see the latest draft-ietf-ippm-ioam-data-07 reserved the bit 23. Are you = going to define the usage of that bit or not? Defer it to other draft or next version? 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Wed, 25 Sep 2019 06:47:29 +0000 From: "Frank Brockners (fbrockne)" To: Tianran Zhou , Tom Herbert CC: "ippm@ietf.org" Thread-Topic: In-situ OAM Data Type Extension Thread-Index: AdVzZ7Gfd6262M0xTaqtGX5AFwofPAABP3ew Date: Wed, 25 Sep 2019 06:47:29 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=fbrockne@cisco.com; x-originating-ip: [173.38.220.39] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bf51d183-2882-480f-5ab0-08d741843c08 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600167)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:BYAPR11MB3574; x-ms-traffictypediagnostic: BYAPR11MB3574: x-ms-exchange-purlcount: 2 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-forefront-prvs: 01713B2841 x-forefront-antispam-report: SFV:NSPM; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: bf51d183-2882-480f-5ab0-08d741843c08 X-MS-Exchange-CrossTenant-originalarrivaltime: 25 Sep 2019 06:47:29.2714 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: uenUnX0iuWYBRrEl05VKbgF1rmVrjahDKJNZFTOOMEGXa2wdvvLjCe98DGyR+tQBjzJ0+P7XcaxvSoEUmI3btg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB3574 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.36.7.11, xch-aln-001.cisco.com X-Outbound-Node: rcdn-core-12.cisco.com Archived-At: Subject: Re: [ippm] In-situ OAM Data Type Extension X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 06:47:36 -0000 Hi Tianran, Like what you state below: Per Tom's suggestion a reserved bit to ensure fu= ture extensibility was added in the most recent rev, i.e. draft-ietf-ippm-i= oam-data-07. We can define the use of the bit and potential extension once we're in need= of extending. For now we still have plenty of spare bits. Regards, Frank > -----Original Message----- > From: Tianran Zhou > Sent: Mittwoch, 25. September 2019 08:36 > To: Frank Brockners (fbrockne) ; Tom Herbert > > Cc: ippm@ietf.org > Subject: In-situ OAM Data Type Extension >=20 > Hi Frank, >=20 > I am revisiting the mailing list. And I am interesting about Tom's discus= sion on > IOAM Data Type Extension. > https://mailarchive.ietf.org/arch/msg/ippm/cp0E8-D0XbgTBy_3Bf6E21z00EA >=20 > You had the following reply: > "* 24 bits Trace type > Per your suggestion, reserving a bit to allow for future scalability make= s sense - > and bit 23 would be an obvious choice; which would in turn mean that we'd= need > to assign a different bit for checksum complement. If everyone else is fi= ne with > this change, we can include this change in -07." >=20 > We also had a draft to address the same issue. > https://tools.ietf.org/html/draft-song-ippm-ioam-data-extension-01 >=20 > I see the latest draft-ietf-ippm-ioam-data-07 reserved the bit 23. Are yo= u going > to define the usage of that bit or not? > Defer it to other draft or next version? >=20 > Regards, > Tianran From nobody Wed Sep 25 00:09:45 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4B39A120100 for ; Wed, 25 Sep 2019 00:09:44 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.201 X-Spam-Level: X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-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 EVNCmvloUxZu for ; Wed, 25 Sep 2019 00:09:42 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (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 D95981200FF for ; Wed, 25 Sep 2019 00:09:41 -0700 (PDT) Received: from lhreml703-cah.china.huawei.com (unknown [172.18.7.108]) by Forcepoint Email with ESMTP id 1EE18A84B253B0038BB5 for ; Wed, 25 Sep 2019 08:09:40 +0100 (IST) Received: from lhreml711-chm.china.huawei.com (10.201.108.62) by lhreml703-cah.china.huawei.com (10.201.108.44) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 25 Sep 2019 08:09:39 +0100 Received: from lhreml711-chm.china.huawei.com (10.201.108.62) by lhreml711-chm.china.huawei.com (10.201.108.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Wed, 25 Sep 2019 08:09:39 +0100 Received: from NKGEML411-HUB.china.huawei.com (10.98.56.70) by lhreml711-chm.china.huawei.com (10.201.108.62) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.1.1713.5 via Frontend Transport; Wed, 25 Sep 2019 08:09:39 +0100 Received: from NKGEML515-MBX.china.huawei.com ([fe80::a54a:89d2:c471:ff]) by nkgeml411-hub.china.huawei.com ([10.98.56.70]) with mapi id 14.03.0439.000; Wed, 25 Sep 2019 15:09:33 +0800 From: Tianran Zhou To: "Frank Brockners (fbrockne)" , Tom Herbert CC: "ippm@ietf.org" Thread-Topic: In-situ OAM Data Type Extension Thread-Index: AdVzZ7Gfd6262M0xTaqtGX5AFwofPAABP3ewAAA7zyA= Date: Wed, 25 Sep 2019 07:09:32 +0000 Message-ID: References: In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.156.116] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [ippm] In-situ OAM Data Type Extension X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 07:09:44 -0000 Hi Frank, OK.=20 IMHO, since you have ready reserved that bit for potential extension, why n= ot define it? The data type could be namespace specific. The IETF namespace now does not = use up the bits, but other namespace may need to extend. Tianran > -----Original Message----- > From: Frank Brockners (fbrockne) [mailto:fbrockne@cisco.com] > Sent: Wednesday, September 25, 2019 2:47 PM > To: Tianran Zhou ; Tom Herbert > Cc: ippm@ietf.org > Subject: RE: In-situ OAM Data Type Extension >=20 > Hi Tianran, >=20 > Like what you state below: Per Tom's suggestion a reserved bit to ensure = future > extensibility was added in the most recent rev, i.e. > draft-ietf-ippm-ioam-data-07. > We can define the use of the bit and potential extension once we're in ne= ed > of extending. For now we still have plenty of spare bits. >=20 > Regards, Frank >=20 > > -----Original Message----- > > From: Tianran Zhou > > Sent: Mittwoch, 25. September 2019 08:36 > > To: Frank Brockners (fbrockne) ; Tom Herbert > > > > Cc: ippm@ietf.org > > Subject: In-situ OAM Data Type Extension > > > > Hi Frank, > > > > I am revisiting the mailing list. And I am interesting about Tom's > > discussion on IOAM Data Type Extension. > > https://mailarchive.ietf.org/arch/msg/ippm/cp0E8-D0XbgTBy_3Bf6E21z00EA > > > > You had the following reply: > > "* 24 bits Trace type > > Per your suggestion, reserving a bit to allow for future scalability > > makes sense - and bit 23 would be an obvious choice; which would in > > turn mean that we'd need to assign a different bit for checksum > > complement. If everyone else is fine with this change, we can include t= his > change in -07." > > > > We also had a draft to address the same issue. > > https://tools.ietf.org/html/draft-song-ippm-ioam-data-extension-01 > > > > I see the latest draft-ietf-ippm-ioam-data-07 reserved the bit 23. Are > > you going to define the usage of that bit or not? > > Defer it to other draft or next version? > > > > Regards, > > Tianran From nobody Wed Sep 25 02:55:33 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9E84412011A for ; Wed, 25 Sep 2019 02:55:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.198 X-Spam-Level: X-Spam-Status: No, score=-4.198 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=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 Qql168jJJRev for ; Wed, 25 Sep 2019 02:55:26 -0700 (PDT) Received: from mail.nt.tuwien.ac.at (mail.nt.tuwien.ac.at [128.131.67.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6FD40120120 for ; Wed, 25 Sep 2019 02:55:26 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mail.nt.tuwien.ac.at (Postfix) with ESMTP id 7E2C46EF4ED6; Wed, 25 Sep 2019 11:55:24 +0200 (CEST) Received: from mail.nt.tuwien.ac.at ([127.0.0.1]) by localhost (mail.nt.tuwien.ac.at [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5S7UgaGfWs4L; Wed, 25 Sep 2019 11:55:20 +0200 (CEST) Received: from [128.131.67.210] (toothless.nt.tuwien.ac.at [128.131.67.210]) by mail.nt.tuwien.ac.at (Postfix) with ESMTPSA id 7AF826EF4EC2; Wed, 25 Sep 2019 11:55:20 +0200 (CEST) Reply-To: joachim.fabini@tuwien.ac.at To: Ruediger.Geib@telekom.de Cc: ippm@ietf.org References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> From: Joachim Fabini Openpgp: preference=signencrypt Autocrypt: addr=joachim.fabini@tuwien.ac.at; prefer-encrypt=mutual; keydata= mQINBFzP9YwBEADLSwTOJGpr6+y+UQ2tko4lnJLfcazo3MHJq6w8CoOAeBhgvxHvksx48RpB JOculUcAP+Sr/dAsVJRvbrd3ZVFl5X+5rq5HqZtEER64JkZN3ZWwuZJ2cIPe8UrmPUCCSdDm Q2Ss3jWRYq+5bg9xG9pgRdfXQj4EzocE5+vnq1TEx5skuAK2pmntE29gCO8ICIO0qOtlNMyz UNPyb/wvVR/+8Umj5xO3kJrEjq7NpYCPP+I2nmRmrCVNQ+ruQGjHFbFzLCzeQj/Ln+vHJy3C O5qbBs/8aae2+7g/N642ODgXv78mg6k4r/yA2uCoeqirj9P6d/8qyhdU247oe+96FLwd4ly5 cHjmS5FEBhNsZKB3yPwod8phWwMZhPDro+ttkTRjL9CTmXspLFPlYwDqkuyEVMOHh24toFVI 0QukzYWLrMwY3ae0ni8DM5fcTQaFDWr4rqRcfGRhA66xxT4uUAX20q1VzWBO2fVUr0eB3Hwr FjCS7URAlsPFebuevgt1/pjSbcRk20TXPp//1qwh8GU03C6qy5iHB8coAsCwZec3S92YEdgM obdYgVhLPHOMd89IfldRASAConvQzI8WkiabzkMpL0donUUErNQ9RVFQ1NRoLJYIx2D0CMFN RW01q0xZFEKci+r/S2/YUkhXTXD4cEx4y3A4WCJPi0teSUW8owARAQABtCxKb2FjaGltIEZh YmluaSA8am9hY2hpbS5mYWJpbmlAdHV3aWVuLmFjLmF0PokCQAQTAQgAKgIbIwUJCWYBgAUL CQgHAgYVCAkKCwIEFgIDAQIeAQIXgAUCXM/2+wIZAQAKCRCbDicB0srp1dEXEACLpHerJzi7 684Ixo6sgwQ0TM/oVV7unXIqFZuuZLMf4r609La++l0BXSmj6LtrIqZVXoFVRwIutEADmaKZ k2kc2zVaKWN/BM4/o8r0db/jOdElv8bbqsui1HYCA1KIKu2nNEMQd1axH0mzBUEFQaIoEPQP mQszQhKHw1ZgAjrsyvU7ZH9aHTboPvLURIAH0CBfgvnm+feFxl/rMBSLu5CJpff9cWA1inKX 1eEexy2tFR80NUSaLauRLC9j9Xe2q+7DLNAT16+5dgRt16bXlkUh4IMpG5k6vpyFu12vSfcB VHJZEKld9APoHoHdjgq7QSeyENfZU+XeAzT/U0fDvF7v392/Fnw7UfVNi5TW2DjiR1cf5ahG YNzfJlIRmiFAkGAxjA6LV6tidpr+KtKvgTh00JZoHVpd4f26/bRTuHXzZh/G36r1bo3qYaQQ mebj6HocdFofh4dN08zv9tiYfrn9uAScZ8JeNQQWb1fg8a2a3nnGLAQiqyFKiuklczA/wkcV ZklezqdO/8nhEhSmiGOLiVwCCdMOBwwBhhJc3iXNYt+pp/v+X/T6m10wwJrwF0JVaPsKqk/m XwCw3jCjcu6iBHPwxS5qmCyJJmBwqq8RtA+Bjdp4J1CIJN3cb+fDoteXBJHYSWYFNGSa9wC4 kSGpw/5LyucT7vSCSolwdC0YVbkCDQRcz/WMARAAyMkUJLJo7g0HwerlxK2kzncvpN0ACN+b Dq89kxJPpbUivE/5I8CTpYQUVBEIq7mvk5/vZj7NWiOdBqW7yx3pmnSuzVtIy7+SB9nVm4mZ InnHij8g1IQ5267C2x1jv93PdbGXFFeEHHg0h/4GjN//3ScyhKt0vf6tDPjGwkUe5tvpvTx7 NiCW2D5hk+tQf5FcvKhwFYCKC6b9DaIb19QgjuANo/g6is/n5M4CYiX+Pqx5j+J6NjG9hMLc 4GTSQur8Ix7LZ3G78z7zB1AdiJMCyeaqrYKTVWNsz1DB5MRiGl9Wz5Q9LZu070neMuoOHD+0 Aaud5JbI8YozvxwTbNN8/fV6byVWvCCmtd8ZZDKfQXgav2HvtejFlm0ix9MTl87+OUGbpLtm WIS/2qZtamrTVfv5dVlCM9ziHkkhV75nMr6X6h+tAaedboC7xIWR8bAC4HGk3KN1cmwjgy4D G87X+tYNmzhAQHioHEEvfklNXOIvU5coDzpdp/n9OxQxPlA5qC+BDSixQqsu5iTcPaA0iGij Ja3A7Wg69ybigctY22ICCvyUv8WgRoCWcHNfjI3sJULLk+SfygEALfgWQ9xKQI+L0M5h+Tq4 2RUpYVC2HKGtzQZ7YhSQcHu9NobA/4qVJcCF+tZXV5mPeMg5LHpmNhfSQRYgbk2KBvaqJw2D MbsAEQEAAYkCJQQYAQgADwUCXM/1jAIbDAUJCWYBgAAKCRCbDicB0srp1YnTD/0Qao7t3YNk Rc04ed1slc22Ned54huNF10TD5+QVSjfdjiMrlUNYznjqnMEdWDaHKclQS7WaBJO2GetSPFr Etk/IJ0bM+C9GjYh+kfqA0X45X8KC4/XLoARd4I+B4uLk+i0UbhlnL9sibVaIGG6IC6S1HGN M0yA9RJ0FPXl4/QV5JAkLNSDKCiyeFjACqExLk7HHNACrLO8Jr7IH8RDE3rlIEgdWxwTIs+9 GeLvMdtasnfEloZCsGb2proOu1QhMZlqoftLhtMzW+4lEmJnUAfxHZRivpjjlQVtWIQ03t6f txnqh4plL3gJsGV+y4ty4emTN9MJsDAyphkqKPqv29hJTyHoeixSG7G0KT/gO+JqTWm/7wwU d7xOW+WtjsXhNM5k5aJtTGpGAwC6QkKnodu+WUkYxpXJKU4cmEBguFQPCwTlFzh7+Jo98Vbh N9cJUQ5iJau00lDU3qJIcbsD06ccy1EoBjIiqAH59DnumrnP99J6iNj8yCxStc1TjA3dRReu +iOGwyoUlp48c3UlpK4BkSegtd2CA37xkiesebEUoRYiAld410PETVlHCQX/kBa6iAx4oEoG lS4E9h1XOCVa0fnJZfwq00WHUbT+P3E3/svKw63HccEuLHBETuowX1ECcGf7s6E9aaexLqbV jVz9rWWAUFG680+ewfjVKZjb5Q== Message-ID: <22c76deb-89cb-4936-6c1f-6e7171054d2b@tuwien.ac.at> Date: Wed, 25 Sep 2019 11:55:20 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: Subject: Re: [ippm] Fwd: How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 09:55:31 -0000 Hi Ruediger, thank you for your comments, answers inline. On 24/09/2019 12:14, Ruediger.Geib@telekom.de wrote: > Hi Joachim, > > thanks for adding a discussion related to mobile access behavior. I've read some "streaming QoE over LTE" related publications. These are not BTC related, but LTE and CCA interaction also impacts the packet and flow related measurements performed. One conclusion of these publications is, that throughput fluctuations characterize an LTE access network better, than just average throughput values. Did these publications use isolated LTE networks or public ones? Whenever (access) network capacity is shared between users (which is the case for most cellular users in a cell) this is a potential source of non-determinism in terms of measurements that is {hard|impossible} to control. Measurement results depend to a substantial extent on the traffic profile and timing of competing devices and users. > > Your discussion whether to consider an access showing 94.5 Mbit/s throughput for a short time and 83 Mbit/s for a longer interval may indicate, that singleton, short interval BTC measurements used as samples to build a (or some) BTC statistics_to_be_defined might be useful approach. Yes, I like your proposal. A BTC singleton could be measured after detecting stable conditions and for an interval that is sufficiently short to increase the likelihood of almost constant parameters. The need to reflect the "true" path BTC (i.e., the *receiver's* perspective) and detect/eliminate intermediate node buffering is challenging but imo crucial for such experiments. > The above QoE experts use receiver statistics, as you suggest too, however their activities are passive, whereas BTC measurements discussed here are active. I add this to indicate, that a mobile access IPPM BTC metric discussion will have to produce own approaches. The good news about BTC in mobile networks is that (at least in the past, when I did measurements) the scheduling/capacity algorithm predictability and determinism increased for greedy ("the more you ask for, the more you get") users. And BTC measurements are greedy by definition. > I agree that defining "long term average data rate" in a way which is useful to an implementors use case is desirable (the same holds for guidance on a short term singleton BTC metric). Yes, but again: in white box measurements (without exact knowledge on the measurement path implementation and configuration) imo there is an imperative need for the *receiver's* perspective. The *sender* itself can't differentiate between stateful policing, shaping and buffering that may happen on the network path. > To start a discussion: a BTC singleton could consist of back-to-back packets of a length corresponding to an important or expected bottleneck burst tolerance (and/or buffer depth). Hmmh. If buffering is known to happen on the path, I consider the BTC singleton that you mention to be a *prerequisite* for the actual measurement BTC singleton: The active measurement must send sufficient data to fill all buffers within the network path under test. Only subsequent packets allow inference on the path's true BTC. As a side note: an identical approach ("preload") is used for active delay measurements in mobile networks: transferring a large data burst over an idle 3G/4G link makes the radio scheduler to allocate substantial radio resources (i.e. high capacity) to this link. Sending a delay measurement packet immediately after the data burst yields delay values that are by orders of magnitude lower compared to sending the same packets on an almost idle link. I mentioned this detail because of two aspects: 1. The same mechanism could be used to create adequate measurement prerequisites for mobile cellular networks and for fixed access networks, for BTC and for delay measurements. The packets serve distinct purpose - force capacity allocation in cellular networks vs. filling buffers in fixed network paths - but the same method may work for both cases. 2. Measurement results nowadays depend on the use case (i.e., the context in which they have been acquired). They reflect the performance of the network in a particular state that we can (sometimes) artificially enforce as measurement prerequisite. If the state is the one encountered in typical operation, then the results are representative (which will be typically true for BTC). Otherwise they may be misleading. > These singletons should be spaced in a way that a loss and may be queue free long term BTC results. Sorry, I don't get this last sentence (something missing?). Regards Joachim > -----Ursprüngliche Nachricht----- > Von: Joachim Fabini > Gesendet: Dienstag, 24. September 2019 11:20 > An: Matt Mathis ; ALFRED C (AL) ; Geib, Rüdiger > Cc: ippm@ietf.org > Betreff: Re: [ippm] Fwd: How should capacity measurement interact with shaping? > > Matt, > > access technology was the first question I wanted to ask yesterday, you answered it in your last email. > Some more comments, questions, and observations: > - On-demand capacity allocation over time was/is common for mobile cellular access technologies. Superposition of algorithms at various layers (cellular access capacity management, buffering, users in the cell and CCA) generates challenging traces. > - Some details on the measurement architecture could help: where did you measure BTC: at the receiver, at the sender, at intermediate nodes? Time granularity/resolution? > - Al made several good points in his replies; the overshooting of BBR in Fig.5a of http://web.cs.wpi.edu/~claypool/papers/driving-bbr/paper-final.pdf is a hint that *if* there are buffers on the path, BBR will attempt to use them. It's the sequence cache-memory-network: first you fill up all local buffers, then the ones at intermediate nodes on the path, and only later on you can measure the network capacity. Still, 4 seconds for the initial 94.5 Mbit/s burst means truly large buffers... > > You asked for an answer and justification - here we go: > Boiling down to the essence, your question (which capacity to prefer, > 94.5 or 83Mb/s) imo addresses a weakness of RFC3148. In particular a more accurate definition and refinement of "long term" could help. > Quoting RFC 3148: "The intuitive definition of BTC is the expected *long > term* average data rate (bits per second) of a single ideal TCP implementation over the path in question". Is *long term* 4 seconds? > 10s? 1000s? > > My interpretation is that you meant a "time interval sufficiently large for CCA to converge and reach a steady state" (D1). However, this definition considers E2E control/CCA *only* and falls short of the pitfall that Al and I attempted to address in RFC 7312 for delay measurements in mobile network measurements: today's (access) networks are stateful (the copper wire abstraction fails). This stateful network policing interacts with the end-to-end CCA and originates artificial, non-representative and non-repeatable measurement results. In DOCSIS (that I did not measure) it seems that buffering is the main issue. > > Some more reasoning on your BTC measurements: > - In your measurements, when BTC is measured at the sender, the informal definition (D1) seems to hold true for a flow that lasts for slightly less than 4 seconds. But do BTC measurements at the receiver's end yield the same results? They may or may not. > - If the flow duration exceeds 4 seconds, the convergence criterion (as seen by the sender) is no longer fulfilled: conditions change. > - If I'm asked if 94.5Mb/s or 83Mb/s is "the" path BTC, my decision depends on the receiver view: (a) if some buffers on the network path fill up, but the data rate at the receiver is only 83Mb/s, then the network path's BTC is 83Mb/s. If there's a shaper on the path that grants an initial "data credit" to the sender at full speed and only later on shapes, i.e, the receiver can measure 94.5Mb/s for the first 4 seconds, then I'd agree to a BTC of 94.5Mb/s. However, only for the first 4 second interval or for the first y Mbytes of data. > > My point is that (unfortunately) the measurement of BTC for a network path must be tied to use cases to be meaningful. I'm truly convinced that with today's networks it's an illusion to have one single, representative value "BTC is x Mb/s". Decoupling BTC from the network path's state and its evolution with time may not be feasible. > > Reasoning on objective BTC: > First, the measurement of stateful network BTC mandate to take into consideration parameters like (a) the network path implementation, configuration and behavior, (b) the measurement point (sender, receiver, intermediate point), and (c) the measurement flow characteristics (duration, total amount of data? Any parameter that influences on the network state wrt the flow?). These are just examples, it may make sense to structure and categorize these influencing parameters. > > Second, the definition (D1) in RFC3148 could be refined. The *long term* should be made explicit, covering two mandatory components: (a) CCA (end-to-end control) reaching a steady state and (b) the network path under observation reaching a steady state over (c) a well-specified interval. > > In order to be meaningful (and scientifically sound), BTC as an intuitive metric should imho reflect a network path's ability to offer a sustained transfer capacity under (almost) constant conditions for a specified time interval (and/or for a specified amount of data?). Still, architecture and implementation of today's (access) networks make it challenging to identify those intervals during which we have constant conditions. > > So the key question is if one can provide a BTC definition that is accurate, representative and simple/usable for the broad mass. (*) Al and his co-authors have included some key aspect in the capacity-metric draft, some aspects of this thread may be added there, too. But BTC imo is different and even more complex to measure. > > regards Joachim > PS: (*) Leaving aside uncertainty that we will never be able to handle in measurements because of the capacity-sharing in today's access networks (users-in-a-cell, cell usage). > > > > On 19/09/2019 23:17, Matt Mathis wrote: >> Ok, moving the thread to IPPM >> >> Some background, we (Measurement Lab) are testing a new transport >> (TCP) performance measurement tool, based on BBR-TCP.   I'm not ready >> to talk about results yet (well ok, it looks pretty good).    (BTW the >> BBR algorithm just happens to resemble the algorithm described in  >> draft-morton-ippm-capcity-metric-method-00.) >> >> Anyhow we noticed some interesting performance features for number of >> ISPs in the US and Europe and I wanted to get some input for how these >> cases should be treated. >> >> One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, >> fluctuating performance ~75 Mb/s for ~1 second and then stable >> performance at ~83Mb/s for the rest of the 10 second test.    If I >> were to guess this is probably a policer (shaper?) with a 1 MB token >> bucket and a ~83Mb/s token rate (these numbers are not corrected for >> header overheads, which actually matter with this tool).  What is >> weird about it is that different ingress interfaces to the ISP (peers >> or serving locations) exhibit different parameters. >> >> Now the IPPM measurement question:   Is the bulk transport capacity of >> this link ~94.5 Mbit/s or ~83Mb/s?   Justify your answer....? >> >> Thanks, >> --MM-- >> The best way to predict the future is to create it.  - Alan Kay >> >> We must not tolerate intolerance; >>        however our response must be carefully measured: >>             too strong would be hypocritical and risks spiraling out >> of control; >>             too weak risks being mistaken for tacit approval. >> >> Forwarded Conversation >> Subject: How should capacity measurement interact with shaping? >> ------------------------ >> >> From: *Matt Mathis* > > >> Date: Thu, Aug 15, 2019 at 8:55 AM >> To: MORTON, ALFRED C (AL) > > >> >> >> We are seeing shapers  with huge bucket sizes, perhaps as larger or >> larger than 100 MB. >> >> These are prohibitive to test by default, but can have a huge impact >> in some common situations.  E.g. downloading software updates. >> >> An unconditional pass is not good, because some buckets are small.  >> What counts as large enough to be ok, and what "derating" is ok? >> >> Thanks, >> --MM-- >> The best way to predict the future is to create it.  - Alan Kay >> >> We must not tolerate intolerance; >>        however our response must be carefully measured: >>             too strong would be hypocritical and risks spiraling out >> of control; >>             too weak risks being mistaken for tacit approval. >> >> >> ---------- >> From: *MORTON, ALFRED C (AL)* > > >> Date: Mon, Aug 19, 2019 at 5:08 AM >> To: Matt Mathis > >> Cc: CIAVATTONE, LEN >, >> Ruediger.Geib@telekom.de >> > >> >> >> Hi Matt, currently cruising between Crete and Malta,____ >> >> with about 7 days of vacation remaining – Adding my friend Len.____ >> >> You know Rüdiger. It appears I’ve forgotten how to typs in 2 weeks____ >> >> given the number of typos I’ve fixed so far...____ >> >> __ __ >> >> We’ve seen big buffers on a basic DOCSIS cable service (downlink >2 >> sec)____ >> >> but,____ >> >>   we have 1-way delay variation or RTT variation limits____ >> >>   when searching for the max rate, that don’t many packets ____ >> >>   queue in the buffer____ >> >> __ __ >> >>   we want the status messages that result in rate adjustment to >> return____ >> >>  in a reasonable amount of time (50ms + RTT)____ >> >> __ __ >> >>   we usually search for 10 seconds, but if we go back and test with >> ____ >> >>   a fixed rate, we can see the buffer growing if the rate is too >> high.____ >> >> __ __ >> >>   There will eventually be a discussion on the thresholds we use____ >> >>   in the search // load rate control algorithm. The copy of ____ >> >>   Y.1540 I sent you has a simple one, we moved beyond that now____ >> >>   (see the slides I didn’t get to present at IETF).____ >> >> __ __ >> >>   There is value in having some of this discussion on IPPM-list,____ >> >>   so we get some **agenda time at IETF-106** ____ >> >> __ __ >> >> We measure rate and performance, with some performance limits____ >> >> built-in.  Pass/Fail is another step, de-rating too (made sense ____ >> >> with MBM “target_rate”).____ >> >> __ __ >> >> Al____ >> >> >> >> ---------- >> From: > >> Date: Mon, Aug 26, 2019 at 12:05 AM >> To: > >> Cc: >, > > >> >> >> Hi Al,____ >> >> __ __ >> >> thanks for keeping me involved. I don’t have a precise answer and >> doubt, that there will be a single universal truth. ____ >> >> __ __ >> >> If the aim is only to determine the IP bandwidth of an access, then we >> aren’t interested in filling a buffer. Buffering events may occur, >> some of which are useful and to be expected, whereas others are not >> desired:____ >> >> __ __ >> >> * Sender shaping behavior may matter (is traffic at the source CBR or >> is it bursty)____ >> * Random collisions should be tolerated at the access whose bandwidth >> is to be measured.____ >> * Limiting packet drop due to buffer overflow is a design aim or an >> important part of the algorithm, I think.____ >> * Shared media might create bursts. I’m not an expert in the area, but >> there’s an “is bandwidth available” check in some cases between a >> central sender using a shared medium and the receivers connected. >> WiFi and may be other wireless equipment buffers packets also to >> optimize wireless resource optimization.____ >> * It might be an idea to mark some flows by ECN, once there’s a guess >> on a sending bitrate when to expect no or very little packet drop. >> Today, this is experimental. CE marks by an ECN capable device >> should be expected roughly once queuing starts.____ >> >> __ __ >> >> Practically, the set-up should be configurable with commodity hard- >> and software and all metrics should be measurable at the receiver. >> Burstiness of traffic and a distinction between queuing events which >> are to be expected and (undesired) queue build up are the events to be >> distinguished. I hope that can be done with commodity hard- and >> software. I at least am not able to write down a simple metric >> distinguishing queues to be expected from (undesired) queue build up >> causing congestion. The hard- and software to be used should be part >> of the solution, not part of the problem (bursty source traffic and >> timestamps with insufficient accuracy to detect queues are what I’d >> like to avoid).____ >> >> __ __ >> >> I’d suggest to move discussion to the list. ____ >> >> __ __ >> >> Regards,____ >> >> __ __ >> >> Rüdiger____ >> >> >> >> ---------- >> From: *MORTON, ALFRED C (AL)* > > >> Date: Thu, Sep 19, 2019 at 7:01 AM >> To: Ruediger.Geib@telekom..de >> > >> Cc: CIAVATTONE, LEN >, >> mattmathis@google.com >> > >> >> >> I’m catching-up with this thread again, but before I reply:____ >> >> __ __ >> >> *** Any objection to moving this discussion to IPPM-list ?? ***____ >> >> __ __ >> >> @Matt – this is a question to you at this point...____ >> >> __ __ >> >> thanks,____ >> >> Al____ >> >> __ __ >> >> *From:*Ruediger.Geib@telekom.de >> [mailto:Ruediger.Geib@telekom.de ] >> *Sent:* Monday, August 26, 2019 3:05 AM >> *To:* MORTON, ALFRED C (AL) > > >> *Cc:* CIAVATTONE, LEN >; >> mattmathis@google.com >> *Subject:* AW: How should capacity measurement interact with >> shaping?____ >> >> __ __ >> >> Hi Al,____ >> >> __ __ >> >> thanks for keeping me involved. I don’t have a precise answer and >> doubt, that there will be a single universal truth. ____ >> >> __ __ >> >> If the aim is only to determine the IP bandwidth of an access, then we >> aren’t interested in filling a buffer. Buffering events may occur, >> some of which are useful and to be expected, whereas others are not >> desired:____ >> >> __ __ >> >> __-        __Sender shaping behavior may matter (is traffic at the >> source CBR or is it bursty)____ >> >> __-        __Random collisions should be tolerated at the access whose >> bandwidth is to be measured.____ >> >> __-        __Limiting packet drop due to buffer overflow is a design >> aim or an important part of the algorithm, I think.____ >> >> __-        __Shared media might create bursts. I’m not an expert in >> the area, but there’s an “is bandwidth available” check in some cases >> between a central sender using a shared medium and the receivers >> connected. WiFi and may be other wireless equipment buffers packets >> also to optimize wireless resource optimization.____ >> >> __-        __It might be an idea to mark some flows by ECN, once >> there’s a guess on a sending bitrate when to expect no or very little >> packet drop. Today, this is experimental. CE marks by an ECN capable >> device should be expected roughly once queuing starts.____ >> >> >> >> >> _______________________________________________ >> ippm mailing list >> ippm@ietf.org >> https://www.ietf.org/mailman/listinfo/ippm >> > > From nobody Wed Sep 25 04:00:47 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 55188120047 for ; Wed, 25 Sep 2019 04:00:46 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.299 X-Spam-Level: X-Spam-Status: No, score=-4.299 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=telekom.de 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 AGg0F1Uwep8S for ; Wed, 25 Sep 2019 04:00:41 -0700 (PDT) Received: from mailout41.telekom.de (mailout41.telekom.de [194.25.225.151]) (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 6BFEE12010C for ; Wed, 25 Sep 2019 04:00:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telekom.de; i=@telekom.de; q=dns/txt; s=dtag1; t=1569409232; x=1600945232; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=xRR9dt+6UF1r3Kj88Bk4Nv+S/ifrsUhM/CqwEoHodgc=; b=r7WPn1uM4r0jOz6wDfemClV7vsB7UNYyV7SWmNZS+HQDdhb0yLXiAm2O zfHa8Cx97/vCOjuDkF30wuZfs8Wm5E2EU13/FHY575yBuVS55mTa9vWSx jxIgli94BEIVS+m4U1YRHrq1z5rkiDalk4vngrb9Yh1dFmL4nDsR30heG 5/pO+2Q7QM5dxKmgqhuW1j4zsMndq9IDluw3xOBlVPLC10zYffD/6Rskg fXn3m1wR9OLWjSb9mH7zjsXSgakjZe8dsupFxaiKNtbJRMFWD0YcC00an dRzMh7kOeBK27wJZ56xllvELfH0FmehBimUTsnzAw1oPnWfGIUultwBGY w==; Received: from qde9xy.de.t-internal.com ([10.171.254.32]) by MAILOUT41.dmznet.de.t-internal.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Sep 2019 13:00:30 +0200 X-IronPort-AV: E=Sophos;i="5.64,547,1559512800"; d="scan'208";a="369525437" X-MGA-submission: =?us-ascii?q?MDG7FJpOu/TH5tFGVpv6R4tMhGAIT9q7BNKzAq?= =?us-ascii?q?SSEz4S8RqXFKUfNy4/IwKFZH/rQY5YfI9L74pWGt31JvuqN28GXguIPR?= =?us-ascii?q?xIGDliVtfdApsCTz49QEkdrM7Um7KLaFiXqVMujOZYQAgUabc7L3FA2a?= =?us-ascii?q?sg0Wy/P+cVoneENU8j4pJNag=3D=3D?= Received: from he105709.emea1.cds.t-internal.com ([10.169.118.41]) by QDE9Y1.de.t-internal.com with ESMTP/TLS/AES256-SHA; 25 Sep 2019 12:57:49 +0200 Received: from HE105715.EMEA1.cds.t-internal.com (10.169.118.51) by HE105709.emea1.cds.t-internal.com (10.169.118.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 25 Sep 2019 12:57:36 +0200 Received: from HE104160.emea1.cds.t-internal.com (10.171.40.36) by HE105715.EMEA1.cds.t-internal.com (10.169.118.51) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Wed, 25 Sep 2019 12:57:36 +0200 Received: from GER01-FRA-obe.outbound.protection.outlook.de (51.4.80.21) by O365mail03.telekom.de (172.30.0.232) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 25 Sep 2019 12:57:33 +0200 Received: from LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE (10.158.145.12) by LEJPR01MB0316.DEUPRD01.PROD.OUTLOOK.DE (10.158.142.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2284.26; Wed, 25 Sep 2019 10:57:35 +0000 Received: from LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE ([fe80::987d:70fa:4d72:d6da]) by LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE ([fe80::987d:70fa:4d72:d6da%5]) with mapi id 15.20.2284.023; Wed, 25 Sep 2019 10:57:35 +0000 From: To: CC: Thread-Topic: AW: [ippm] Fwd: How should capacity measurement interact with shaping? 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X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 11:00:46 -0000 SGkgSm9hY2hpbSwNCg0KdGhlIFFvRSBtZWFzdXJlbWVudCBjYW1wYWlnbnMgSSBtZW50aW9uZWQg d2VyZSBwZXJmb3JtZWQgb24gYm90aCwgbGFib3JhdG9yeSBhbmQgcHVibGljIExURSBuZXR3b3Jr cy4gVGhlIHJlc2VhcmNoZXJzIHdhbnRlZCB0byBtZWFzdXJlIHJlc3VsdHMgd2hpY2ggcmVsYXRl IHRvIGNvbnN1bWVyIGV4cGVyaWVuY2UuIEkgcmVnYXJkIFFvRSBtZWFzdXJlbWVudHMgYXMgYSBz b3VyY2UgZ2l2aW5nIG1lIGdlbmVyYWwgZ3VpZGFuY2Ugb24gd2hhdCdzIGRvbmUgb24gYSBzdWJq ZWN0IGFsc28gcmVsYXRlZCB0byBRb1MsIGJ1dCBkb24ndCBleHBlY3QgdGhlbSB0byBzZXJ2ZSBh cyBhIGJsdWVwcmludCBmb3IgUW9TIG1lYXN1cmVtZW50cy4gIA0KDQpQcmUtbG9hZGluZyBtYXkg YmUgYSB1c2VmdWwgYXBwcm9hY2ggdG8gcmVhY2ggInN0YWJsZSIgbW9iaWxlIG5ldHdvcmsgY29u ZGl0aW9ucy4gSG9wZWZ1bGx5LCB0aGVyZSBhcmUgY2hvaWNlcyB0byBzcGVjaWZ5ICJzdGFibGUi 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Pauly Message-id: <8EA170D6-58A5-43BE-A2D8-F0511C28B802@apple.com> Content-type: multipart/alternative; boundary="Apple-Mail=_08A3B70E-4996-4BA6-A684-1370FE36009C" MIME-version: 1.0 (Mac OS X Mail 13.0 \(3594.4.17\)) Date: Wed, 25 Sep 2019 09:19:28 -0700 In-reply-to: Cc: Tommy Pauly , Mirja Kuehlewind , draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org, 6man WG , IETF IPPM WG To: Greg Mirsky References: X-Mailer: Apple Mail (2.3594.4.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-25_07:, , signatures=0 Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 16:19:46 -0000 --Apple-Mail=_08A3B70E-4996-4BA6-A684-1370FE36009C Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii > On Sep 19, 2019, at 11:55 AM, Greg Mirsky = wrote: >=20 > Dear Authors, et al., > I have a number of questions on this draft and hope you'll find time = to clarify some aspects of iOAM encapsulation in IPv6 EHs: > format of both Hop-by-Hop Options header and Destination Options = header, as defined in RFC 8200, allow the length of Options field in the = header to be no more than 2K - 2 octets. I consider that to be an = important limitation of the proposed encapsulation method but I don't = find that being discussed in the document. > Section 3 of your draft defines iOAM Option encapsulation format. How = this encapsulation relates to the encapsulation of IPv6 options for the = Hop-by-Hop Options header and Destination Options header? > Section 4.2 in RFC 8200 defines four types of actions to be associated = with the option. Which of these and in what scenarios may be used to = carry iOAM information in IPv6 packet? > Also, in Section 4.2 defined on-bit long flag in the Option Type field = to indicate whether option data may change en route. How this flag will = be used when iOAM option data encapsulated in IPv6 EHs? > Further, the question of choosing a padding option - Pad1 or PadN? = Which these two to be used for iOAM data in IPv6 EHs? > With this number of technical issues being underspecified, I don't = support the adoption of the draft by IPPM WG. And I feel that it would = be more appropriate to ask 6man WG to host this work. We did ask 6man to host this work, but the advise from the group and the = 6man chairs was that they wanted the work done in IPPM, with review by = 6man. I do think these review points you bring up are good to clarify and = address in the document, and we will make sure that such clarification = is made as a working group doc. Thanks, Tommy >=20 > Regards, > Greg >=20 > On Wed, Sep 11, 2019 at 9:11 AM Tommy Pauly = > wrote: > Hello IPPM, >=20 > This email starts a working group adoption call for = draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the = IPv6 option encapsulation for IOAM data. This document was discussed = with the 6man WG, which advised that the work be done in ippm, with = review by 6man. >=20 > The documents are available here: >=20 > = https://datatracker.ietf..org/doc/draft-ioametal-ippm-6man-ioam-ipv6-optio= ns/ = > = https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 = >=20 > Please reply to this email by Wednesday, September 25, with your input = on whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm = > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- --Apple-Mail=_08A3B70E-4996-4BA6-A684-1370FE36009C Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii

On Sep 19, 2019, at 11:55 AM, Greg Mirsky <gregimirsky@gmail.com> wrote:

Dear Authors, et al.,
I have a number of = questions on this draft and hope you'll find time to clarify some = aspects of iOAM encapsulation in IPv6 EHs:
  • format of both Hop-by-Hop Options header and = Destination Options header, as defined in RFC 8200, allow the length of = Options field in the header to be no more than 2K - 2 octets. I consider = that to be an important limitation of the proposed encapsulation method = but I don't find that being discussed in the document.
  • Section 3 of your draft defines iOAM Option = encapsulation format. How this encapsulation relates to the = encapsulation of IPv6 options for the Hop-by-Hop Options header and = Destination Options header?
  • Section 4.2 in RFC 8200 = defines four types of actions to be associated with the option. Which of = these and in what scenarios may be used to carry iOAM information in = IPv6 packet?
  • Also, in Section 4.2 defined on-bit long = flag in the Option Type field to indicate whether option data may change = en route. How this flag will be used when iOAM option data encapsulated = in IPv6 EHs?
  • Further, the question of choosing a = padding option - Pad1 or PadN? Which these two to be used for iOAM data = in IPv6 EHs?
With this number of technical = issues being underspecified, I don't support the adoption of the draft = by IPPM WG. And I feel that it would be more appropriate to ask 6man WG = to host this work.

We did ask 6man to host this work, but the = advise from the group and the 6man chairs was that they wanted the work = done in IPPM, with review by 6man.

I = do think these review points you bring up are good to clarify and = address in the document, and we will make sure that such clarification = is made as a working group doc.

Thanks,
Tommy

Regards,
Greg

On Wed, Sep 11, 2019 at 9:11 AM Tommy = Pauly <tpauly=3D40apple.com@dmarc.ietf.org> wrote:
Hello IPPM,

This email starts a working group adoption call for = draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the = IPv6 option encapsulation for IOAM data. This document was discussed = with the 6man WG, which advised that the work be done in ippm, with = review by 6man.

The documents are available here:

https://datatracker.ietf..org/doc/draft-ioametal-ippm-6man-ioam= -ipv6-options/
https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-= options-02

Please reply to this email by Wednesday, September 25, with your input = on whether or not the WG should adopt this document.

Best,
Tommy (as IPPM co-chair)
_______________________________________________
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https://www.ietf.org/mailman/listinfo/ippm
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= --Apple-Mail=_08A3B70E-4996-4BA6-A684-1370FE36009C-- From nobody Wed Sep 25 09:22:18 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 49FD4120013; Wed, 25 Sep 2019 09:22:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.028 X-Spam-Level: X-Spam-Status: No, score=-2.028 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.026, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=apple.com 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 bU4zgvnIbPAF; Wed, 25 Sep 2019 09:22:14 -0700 (PDT) Received: from ma1-aaemail-dr-lapp03.apple.com (ma1-aaemail-dr-lapp03.apple.com [17.171.2.72]) (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 7BAA61200D7; Wed, 25 Sep 2019 09:22:14 -0700 (PDT) Received: from pps.filterd (ma1-aaemail-dr-lapp03.apple.com [127.0.0.1]) by ma1-aaemail-dr-lapp03.apple.com (8.16.0.27/8.16.0.27) with SMTP id x8PGH8A6023141; Wed, 25 Sep 2019 09:22:12 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=apple.com; h=sender : content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=20180706; bh=43417++CTdSSd3Z3WZPpUom/tv2hkyLJzc5oQ7WwK6w=; b=L9qcbevwgjNePCejSz2/VqOZ9UlE+Yvr75KqTjYudVCcAyK0th9zR5MB/0/oC5idIv69 oDR/uDBBrqw4o1f9mf1Vk+74l3vICcvDaBQTY9dwVPPhnk4frcYctJMHSLmRs0JDSls3 5jMkcLkC0XOHbnieFGVftDxThW/jWE6hbYGv+OzIypinfZJFdVSz6E571ghRg/1HM/Vn uihQ4/h5g6F3HXBz5JwLVntA5B/pnBV2CnXHGYk9UZZVzAXGNqwCFOEIexwCG62zR3Go s852vrQzvY4xpunOAimAaFUY78Zv3ijQjzqMFIThXcNg3f79NNndtoDvfSivcd4hmMX7 IA== Received: from mr2-mtap-s01.rno.apple.com (mr2-mtap-s01.rno.apple.com [17.179.226.133]) by ma1-aaemail-dr-lapp03.apple.com with ESMTP id 2v5mckp9km-8 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Wed, 25 Sep 2019 09:22:12 -0700 Received: from nwk-mmpp-sz13.apple.com (nwk-mmpp-sz13.apple.com [17.128.115.216]) by mr2-mtap-s01.rno.apple.com (Oracle Communications Messaging Server 8.0.2.4.20190507 64bit (built May 7 2019)) with ESMTPS id <0PYE001NNASYDY50@mr2-mtap-s01.rno.apple.com>; Wed, 25 Sep 2019 09:22:10 -0700 (PDT) Received: from process_milters-daemon.nwk-mmpp-sz13.apple.com by nwk-mmpp-sz13.apple.com (Oracle Communications Messaging Server 8.0.2.4.20190507 64bit (built May 7 2019)) id <0PYE00H00AAXQ600@nwk-mmpp-sz13.apple.com>; Wed, 25 Sep 2019 09:22:10 -0700 (PDT) X-Va-CD: 0 X-Va-ID: a7a387ed-4889-45b7-8b2d-ae12043b09c2 X-V-A: X-V-T-CD: ccbb941fa776fca33712ae3edba7bab2 X-V-E-CD: 0ecbca84f4e6ef1228e12cd80b7a6e1b X-V-R-CD: 235c9b7466532255718bf0d31c695f22 X-V-CD: 0 X-V-ID: b85eec30-1368-452d-b05e-1bfd9b3af989 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-09-25_07:,, signatures=0 Received: from [17.192.171.159] by nwk-mmpp-sz13.apple.com (Oracle Communications Messaging Server 8.0.2.4.20190507 64bit (built May 7 2019)) with ESMTPSA id <0PYE003NBASYZ860@nwk-mmpp-sz13.apple.com>; Wed, 25 Sep 2019 09:22:10 -0700 (PDT) Sender: tpauly@apple.com Content-type: text/plain; charset=us-ascii MIME-version: 1.0 (Mac OS X Mail 13.0 \(3594.4.17\)) From: Tommy Pauly In-reply-to: Date: Wed, 25 Sep 2019 09:22:06 -0700 Cc: draft-ioametal-ippm-6man-ioam-ipv6-options@ietf.org Content-transfer-encoding: quoted-printable Message-id: <7F7C9158-98C7-48D2-B345-7602D5FE36FE@apple.com> References: To: Tommy Pauly , IETF IPPM WG X-Mailer: Apple Mail (2.3594.4.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-25_07:, , signatures=0 Archived-At: Subject: Re: [ippm] Adoption call for draft-ioametal-ippm-6man-ioam-ipv6-options X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 16:22:16 -0000 Hello IPPM, Thanks for all of the feedback. It seems that the rough consensus of the = group is that we should adopt this document. As we progress with this document, we should expect to share it with = 6man and get input and review feedback from that group. Authors, please submit a "draft-ietf-ippm-6man-ioam-ipv6-options-00" = when ready. It would be good to incorporate some of the review feedback = received on this thread. Thanks, Tommy > On Sep 11, 2019, at 9:10 AM, Tommy Pauly = wrote: >=20 > Hello IPPM, >=20 > This email starts a working group adoption call for = draft-ioametal-ippm-6man-ioam-ipv6-options. This document defines the = IPv6 option encapsulation for IOAM data. This document was discussed = with the 6man WG, which advised that the work be done in ippm, with = review by 6man. >=20 > The documents are available here: >=20 > = https://datatracker.ietf.org/doc/draft-ioametal-ippm-6man-ioam-ipv6-option= s/ > = https://tools.ietf.org/html/draft-ioametal-ippm-6man-ioam-ipv6-options-02 >=20 > Please reply to this email by Wednesday, September 25, with your input = on whether or not the WG should adopt this document. >=20 > Best, > Tommy (as IPPM co-chair) > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm From nobody Wed Sep 25 15:20:58 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1647A1200D6 for ; Wed, 25 Sep 2019 15:20:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=unavailable 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 MISQO00_igfN for ; Wed, 25 Sep 2019 15:20:52 -0700 (PDT) Received: from cnet.fi.uba.ar (cnet.fi.uba.ar [157.92.58.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2C9211200A4 for ; Wed, 25 Sep 2019 15:20:50 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by cnet.fi.uba.ar (Postfix) with ESMTP id 87E56140077; Wed, 25 Sep 2019 19:20:43 -0300 (ART) X-Virus-Scanned: Debian amavisd-new at cnet.fi.uba.ar Received: from cnet.fi.uba.ar ([127.0.0.1]) by localhost (cnet.fi.uba.ar [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dLQU6EGpOADJ; Wed, 25 Sep 2019 19:20:36 -0300 (ART) Received: from [IPv6:::1] (flame.uba.ar [157.92.58.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by cnet.fi.uba.ar (Postfix) with ESMTPSA id 74A8C140068; Wed, 25 Sep 2019 19:20:36 -0300 (ART) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: J Ignacio Alvarez-Hamelin In-Reply-To: Date: Wed, 25 Sep 2019 19:20:39 -0300 Cc: "MORTON, ALFRED C (AL)" , "CIAVATTONE, LEN" , "ippm@ietf.org" Content-Transfer-Encoding: quoted-printable Message-Id: References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF94D0@njmtexg5.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9BA5@njmtexg5.research.att.com> To: Matt Mathis X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [ippm] How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Wed, 25 Sep 2019 22:20:56 -0000 Dear Matt, I use to discuss with Al and R=C3=BCdiger about some issues about = measurements in IP networks.=20 I would like to introduce another point of view (sorry to get the = "entropy" larger=E2=80=A6), In my opinion one part of the problem is = that one would like to establish how significant is the Internet = connection, and it depends not only on the channel technology but in a = lot of other parameters (like "buckets", etc.). My question is: why one = wants to measure the "real" access if this one could not be available = 100% of the time at that specific speed? It is clearly not realistic = that an ISP provides 100Mbps all the time for every customer; therefore, = another kind of measurement could be considered.=20 Form the other optic, BBR is a great technique to achieve the best = possible capacity incredibly quick, and here the problem is another. (By = the way, I think that the BBR difficulty is potentially related to the = interactions with several concurrent flows; which, even if there are = some studies, I think it is not entirely understood.)=20 Then, there are situations, from the user-application, that it is needed = to use a high capacity during a time (i.e., security software updates), = and this could be interesting to provide protocols, like BBR, to ensure = that. What end you pursuit? Understand what is happening on the network to = bring a solution to this kind of applications, or you would like to = measure the properties?=20 For my point of view (sorry Al to repeat this one more time), if we like = to produce some information about the network status for the end-user, = we need to work on parameters that express the "quality": quite hard.=20 On idea on this path is to know if my network could carry some "bursty" = traffic in *every* time; which means to measure continuously, i.e., we = cannot saturate the link all the time. This fact leads to another idea: = to develop an active and low impact measurement to asses to quality: can = I send or receive some busty traffic? I understand that how long and how = much "bursty" is not defined here, but we can figure out (or try some = reasonable numbers at least ). I got a couple of ideas using RTTs and my = experience measuring RTTs on IP networks. The central part here is that performing measurement using bottleneck = limit trigger different mechanisms, like one that you described, but = potentially others more complex. (By the way, avoiding lost packets but = controlling the delay is an exciting way to influence BBR). Best, Ignacio _______________________________________________________________ Dr. Ing. Jos=C3=A9 Ignacio Alvarez-Hamelin CONICET and Facultad de Ingenier=C3=ADa, Universidad de Buenos Aires Av. Paseo Col=C3=B3n 850 - C1063ACV - Buenos Aires - Argentina +54 (11) 5285 0716 / 5285 0705 e-mail: ihameli@cnet.fi.uba.ar web: http://cnet.fi.uba.ar/ignacio.alvarez-hamelin/ _______________________________________________________________ > On 21 Sep 2019, at 15:32, Matt Mathis = wrote: >=20 > Yes, exactly, I am sure this is a provider's feature. I have a = receiver side pcap, and it is quite a bit more complicated than I = thought: > - Zero losses in the entire trace. It is dynamically shaped at a = bottleneck with a long queue that is pacing packets. > - The initial part is really straight (looks like a hard limit) > - The rate (and packet headway) smoothly wanders irregularly all over = the place in the latter part of the trace, from a low of about 1 Mb/s to = peaks close to the max rate. My earlier data was from BBR max_rate, so = the fluctuating rate apparently has stable peaks. >=20 > By smooth: it looked like a spline fit, suggesting the instantaneous = packet headway was determined by a differential equation.... >=20 > This behavior is not an accident, but the result of a very = sophisticated controller. And we have seen other bottlenecks like it = elsewhere in the US and Europe. >=20 > As people may know, I do believe that shaping is the most appropriate = way to deal with heavy hitters. And that we (IPPM) really need a way to = characterize shaping. I do care about the asymptotic rate, and how = quickly I fall out of the initial rate. >=20 > Thanks, > --MM-- > The best way to predict the future is to create it. - Alan Kay >=20 > We must not tolerate intolerance; > however our response must be carefully measured:=20 > too strong would be hypocritical and risks spiraling out = of control; > too weak risks being mistaken for tacit approval. >=20 >=20 > On Sat, Sep 21, 2019 at 8:34 AM MORTON, ALFRED C (AL) = wrote: > Hi Matt, >=20 > =20 >=20 > I had another thought about the 94 > 75 > 83 Mbps trace: >=20 > This might well be a service provider=E2=80=99s feature, where >=20 > they favor new flows with a high-rate for a short amount >=20 > of time. I remember some ISPs offering a =E2=80=9Cspeed boost=E2=80=9D >=20 > to load web pages fast, but settling to a lower rate for >=20 > longer transfers. The same strategy could help reduce >=20 > the initial buffering time for video streams, perhaps with >=20 > different time intervals and rates. This might be implemented >=20 > by changing the token rate, or through some other means. >=20 > =20 >=20 > =20 >=20 > From: Matt Mathis [mailto:mattmathis@google.com]=20 > Sent: Thursday, September 19, 2019 9:43 PM > To: MORTON, ALFRED C (AL) > Cc: Ruediger.Geib@telekom.de; ippm@ietf.org; CIAVATTONE, LEN = > Subject: Re: How should capacity measurement interact with shaping? >=20 > =20 >=20 > I am actually more interested in the philosophical questions about how = this should be reported, and what should the language be about = non-stationary available capacity. One intersecting issue: BBR = converges on both the initial and final rate in under 2 seconds (this = was a long path, so startup took more than a second). Do users want a = quick (and relatively cheap) test that takes 2 seconds or a longer test = that is more likely to discover the token bucket? How long? If we want = to call them different names, what should they be? >=20 > [acm] >=20 > So, if your trace is revealing a bimodal form of service rates, >=20 > then it ought to be characterized with that in mind and >=20 > allow for two modes of operation when reporting: >=20 > 94 initial peak Capacity, 83 sustained Capacity >=20 > *when this behavior is demonstrated and repeatable=E2=80=9D. >=20 > =20 >=20 > Thanks for more insights about BBR, too. >=20 > Al >=20 > =20 >=20 > On the pure technical issues: BBR is still quite a moving target. I = have a paper in draft that will shed some light on this. It is due to = be unembargoed sometime in October. >=20 > BBRv1 (released slightly after the cacm paper you mention) measures = the max_BW every 8 RTT. BBRv2 measures the max_BW on a sliding schedule = that loosely matches CUBIC. (In both, min_RTT is measured every 10 = seconds, in the absence of organic low RTT samples). BBRv2 uses = additional signals and does a much better job of avoiding overshoot at = the startup. >=20 > =20 >=20 > In any case the best (most stable) BBR based metric seems to be = delta(snd.una)/elapsed_time, which is the progress as seen by upper = layers. If you look at short time slices (we happen to be using 0.25 = seconds) you see a mostly crisp square wave. If you average from the = beginning of the connection to now, the peak rate happens at the moment = the bucket runs out of tokens, and falls towards the toke rate after = that. >=20 >=20 >=20 > Thanks, >=20 > --MM-- > The best way to predict the future is to create it. - Alan Kay >=20 > We must not tolerate intolerance; >=20 > however our response must be carefully measured:=20 >=20 > too strong would be hypocritical and risks spiraling out = of control; >=20 > too weak risks being mistaken for tacit approval. >=20 > =20 >=20 > =20 >=20 > On Thu, Sep 19, 2019 at 3:35 PM MORTON, ALFRED C (AL) = wrote: >=20 > Thanks Matt! This is an interesting trace to consider, >=20 > and an important discussion to share with the group. >=20 > =20 >=20 > When I look at the equation for BBR: >=20 > = https://cacm.acm.org/magazines/2017/2/212428-bbr-congestion-based-congesti= on-control/fulltext >=20 > =20 >=20 > both BBR and Maximum IP-layer Capacity Metric seek the >=20 > Max over some time interval. The window seems smaller for >=20 > BBR: 6 to 10 RTTs, where we=E2=80=99ve been using parameters that >=20 > result in a rate measurement once a second and take the max >=20 > of the 10 one-second measurements. >=20 > =20 >=20 > We=E2=80=99ve also evaluate several performance metrics when >=20 > adjusting load, and that determines how high the sending >=20 > rate will go (based on feedback from the receiver). >=20 > = https://tools.ietf.org/html/draft-morton-ippm-capcity-metric-method-00#sec= tion-4.3 >=20 > =20 >=20 > So, it seems that the MAX delivered rate for the 10 second test, we >=20 > can all see is 94.5 Mbps. This rate was sustained for more >=20 > than a trivial amount of time, too. But if you are concerned that this >=20 > rate was somehow inflated by a large buffer and a large >=20 > burst tolerance in the shaper =E2=80=93 that=E2=80=99s where the = additional >=20 > metrics and slightly different sending rate control >=20 > that we described in the draft (and the slides) might help. >=20 > = https://datatracker.ietf.org/meeting/105/materials/slides-105-ippm-metrics= -and-methods-for-ip-capacity-00 >=20 > =20 >=20 > IOW, it might well be that Max IP Capacity, measured as we designed >=20 > and parameterized it, measures 83 Mbps for this path >=20 > (assuming the 94.5 is the result of big overshoot at sender, and the >=20 > fluctuating performance afterward seems to support that). >=20 > =20 >=20 > When I was looking for background on BBR, I saw a paper comparing >=20 > BBR and CUBIC during drive tests. >=20 > http://web.cs.wpi.edu/~claypool/papers/driving-bbr/ >=20 > One pair of plots seemed to indicate that BBR sent lots of Bytes >=20 > early-on, and grew the RTT pretty high before settling down >=20 > (Figure 5, a & b). >=20 > This looks a bit like the case you described below, >=20 > except 94.5 Mbps is a Received Rate =E2=80=93 we don=E2=80=99t know >=20 > what came out of the network, just what went in and filled >=20 > a buffer before crashing down in the drive test. >=20 > =20 >=20 > So, I think I did more investigation than justification >=20 > for my answers, but I conclude the parameters like the >=20 > individual measurement intervals and overall time interval >=20 > from which the Max is drawn, plus the rate control algorithm >=20 > itself, play a big role here. >=20 > =20 >=20 > regards, >=20 > Al >=20 > =20 >=20 > =20 >=20 > From: Matt Mathis [mailto:mattmathis@google.com]=20 > Sent: Thursday, September 19, 2019 5:18 PM > To: MORTON, ALFRED C (AL) ; = Ruediger.Geib@telekom.de > Cc: ippm@ietf.org > Subject: Fwd: How should capacity measurement interact with shaping? >=20 > =20 >=20 > Ok, moving the thread to IPPM >=20 > =20 >=20 > Some background, we (Measurement Lab) are testing a new transport = (TCP) performance measurement tool, based on BBR-TCP. I'm not ready to = talk about results yet (well ok, it looks pretty good). (BTW the BBR = algorithm just happens to resemble the algorithm described in = draft-morton-ippm-capcity-metric-method-00.) >=20 > =20 >=20 > Anyhow we noticed some interesting performance features for number of = ISPs in the US and Europe and I wanted to get some input for how these = cases should be treated. >=20 > =20 >=20 > One data point, a single trace saw ~94.5 Mbit/s for ~4 seconds, = fluctuating performance ~75 Mb/s for ~1 second and then stable = performance at ~83Mb/s for the rest of the 10 second test. If I were = to guess this is probably a policer (shaper?) with a 1 MB token bucket = and a ~83Mb/s token rate (these numbers are not corrected for header = overheads, which actually matter with this tool). What is weird about = it is that different ingress interfaces to the ISP (peers or serving = locations) exhibit different parameters. =20 >=20 > =20 >=20 > Now the IPPM measurement question: Is the bulk transport capacity of = this link ~94.5 Mbit/s or ~83Mb/s? Justify your answer....? >=20 > =20 >=20 > Thanks, >=20 > --MM-- > The best way to predict the future is to create it. - Alan Kay >=20 > We must not tolerate intolerance; >=20 > however our response must be carefully measured:=20 >=20 > too strong would be hypocritical and risks spiraling out = of control; >=20 > too weak risks being mistaken for tacit approval. >=20 > =20 >=20 > Forwarded Conversation > Subject: How should capacity measurement interact with shaping? > ------------------------ >=20 > =20 >=20 > From: Matt Mathis > Date: Thu, Aug 15, 2019 at 8:55 AM > To: MORTON, ALFRED C (AL) >=20 > =20 >=20 > We are seeing shapers with huge bucket sizes, perhaps as larger or = larger than 100 MB. >=20 > =20 >=20 > These are prohibitive to test by default, but can have a huge impact = in some common situations. E.g. downloading software updates. >=20 > =20 >=20 > An unconditional pass is not good, because some buckets are small. = What counts as large enough to be ok, and what "derating" is ok? >=20 >=20 >=20 > Thanks, >=20 > --MM-- > The best way to predict the future is to create it. - Alan Kay >=20 > We must not tolerate intolerance; >=20 > however our response must be carefully measured:=20 >=20 > too strong would be hypocritical and risks spiraling out = of control; >=20 > too weak risks being mistaken for tacit approval. >=20 > =20 >=20 > ---------- > From: MORTON, ALFRED C (AL) > Date: Mon, Aug 19, 2019 at 5:08 AM > To: Matt Mathis > Cc: CIAVATTONE, LEN , Ruediger.Geib@telekom.de = >=20 > =20 >=20 > Hi Matt, currently cruising between Crete and Malta, >=20 > with about 7 days of vacation remaining =E2=80=93 Adding my friend = Len. >=20 > You know R=C3=BCdiger. It appears I=E2=80=99ve forgotten how to typs = in 2 weeks >=20 > given the number of typos I=E2=80=99ve fixed so far... >=20 > =20 >=20 > We=E2=80=99ve seen big buffers on a basic DOCSIS cable service = (downlink >2 sec) >=20 > but, >=20 > we have 1-way delay variation or RTT variation limits >=20 > when searching for the max rate, that don=E2=80=99t many packets >=20 > queue in the buffer >=20 > =20 >=20 > we want the status messages that result in rate adjustment to return >=20 > in a reasonable amount of time (50ms + RTT) >=20 > =20 >=20 > we usually search for 10 seconds, but if we go back and test with >=20 > a fixed rate, we can see the buffer growing if the rate is too high. >=20 > =20 >=20 > There will eventually be a discussion on the thresholds we use >=20 > in the search // load rate control algorithm. The copy of >=20 > Y.1540 I sent you has a simple one, we moved beyond that now >=20 > (see the slides I didn=E2=80=99t get to present at IETF). >=20 > =20 >=20 > There is value in having some of this discussion on IPPM-list, >=20 > so we get some *agenda time at IETF-106* >=20 > =20 >=20 > We measure rate and performance, with some performance limits >=20 > built-in. Pass/Fail is another step, de-rating too (made sense >=20 > with MBM =E2=80=9Ctarget_rate=E2=80=9D). >=20 > =20 >=20 > Al >=20 > =20 >=20 > ---------- > From: > Date: Mon, Aug 26, 2019 at 12:05 AM > To: > Cc: , >=20 > =20 >=20 > Hi Al, >=20 > =20 >=20 > thanks for keeping me involved. I don=E2=80=99t have a precise answer = and doubt, that there will be a single universal truth. >=20 > =20 >=20 > If the aim is only to determine the IP bandwidth of an access, then we = aren=E2=80=99t interested in filling a buffer. Buffering events may = occur, some of which are useful and to be expected, whereas others are = not desired: >=20 > =20 >=20 > =E2=80=A2 Sender shaping behavior may matter (is traffic at the = source CBR or is it bursty) > =E2=80=A2 Random collisions should be tolerated at the access = whose bandwidth is to be measured. > =E2=80=A2 Limiting packet drop due to buffer overflow is a = design aim or an important part of the algorithm, I think. > =E2=80=A2 Shared media might create bursts. I=E2=80=99m not an = expert in the area, but there=E2=80=99s an =E2=80=9Cis bandwidth = available=E2=80=9D check in some cases between a central sender using a = shared medium and the receivers connected. WiFi and may be other = wireless equipment buffers packets also to optimize wireless resource = optimization. > =E2=80=A2 It might be an idea to mark some flows by ECN, once = there=E2=80=99s a guess on a sending bitrate when to expect no or very = little packet drop. Today, this is experimental. CE marks by an ECN = capable device should be expected roughly once queuing starts. > =20 >=20 > Practically, the set-up should be configurable with commodity hard- = and software and all metrics should be measurable at the receiver. = Burstiness of traffic and a distinction between queuing events which are = to be expected and (undesired) queue build up are the events to be = distinguished. I hope that can be done with commodity hard- and = software. I at least am not able to write down a simple metric = distinguishing queues to be expected from (undesired) queue build up = causing congestion. The hard- and software to be used should be part of = the solution, not part of the problem (bursty source traffic and = timestamps with insufficient accuracy to detect queues are what I=E2=80=99= d like to avoid). >=20 > =20 >=20 > I=E2=80=99d suggest to move discussion to the list. >=20 > =20 >=20 > Regards, >=20 > =20 >=20 > R=C3=BCdiger >=20 > =20 >=20 > ---------- > From: MORTON, ALFRED C (AL) > Date: Thu, Sep 19, 2019 at 7:01 AM > To: Ruediger.Geib@telekom.de > Cc: CIAVATTONE, LEN , mattmathis@google.com = >=20 > =20 >=20 > I=E2=80=99m catching-up with this thread again, but before I reply: >=20 > =20 >=20 > *** Any objection to moving this discussion to IPPM-list ?? *** >=20 > =20 >=20 > @Matt =E2=80=93 this is a question to you at this point... >=20 > =20 >=20 > thanks, >=20 > Al >=20 > =20 >=20 > From: Ruediger.Geib@telekom.de [mailto:Ruediger.Geib@telekom.de]=20 > Sent: Monday, August 26, 2019 3:05 AM > To: MORTON, ALFRED C (AL) > Cc: CIAVATTONE, LEN ; mattmathis@google.com > Subject: AW: How should capacity measurement interact with shaping? >=20 > =20 >=20 > Hi Al, >=20 > =20 >=20 > thanks for keeping me involved. I don=E2=80=99t have a precise answer = and doubt, that there will be a single universal truth. >=20 > =20 >=20 > If the aim is only to determine the IP bandwidth of an access, then we = aren=E2=80=99t interested in filling a buffer. Buffering events may = occur, some of which are useful and to be expected, whereas others are = not desired: >=20 > =20 >=20 > - Sender shaping behavior may matter (is traffic at the source = CBR or is it bursty) >=20 > - Random collisions should be tolerated at the access whose = bandwidth is to be measured. >=20 > - Limiting packet drop due to buffer overflow is a design aim = or an important part of the algorithm, I think. >=20 > - Shared media might create bursts. I=E2=80=99m not an expert = in the area, but there=E2=80=99s an =E2=80=9Cis bandwidth available=E2=80=9D= check in some cases between a central sender using a shared medium and = the receivers connected. WiFi and may be other wireless equipment = buffers packets also to optimize wireless resource optimization. >=20 > - It might be an idea to mark some flows by ECN, once there=E2=80= =99s a guess on a sending bitrate when to expect no or very little = packet drop. Today, this is experimental. CE marks by an ECN capable = device should be expected roughly once queuing starts. >=20 > =20 >=20 > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm From nobody Wed Sep 25 23:50:43 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B30D412004C for ; Wed, 25 Sep 2019 23:50:40 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.298 X-Spam-Level: X-Spam-Status: No, score=-4.298 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=telekom.de 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 EpoSypYUBewg for ; Wed, 25 Sep 2019 23:50:35 -0700 (PDT) Received: from mailout11.telekom.de (mailout11.telekom.de [194.25.225.207]) (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 0F92F120045 for ; Wed, 25 Sep 2019 23:50:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telekom.de; i=@telekom.de; q=dns/txt; s=dtag1; t=1569480620; x=1601016620; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=pX/UDzkMC+R4jEsElrn1p/8BeSxd0XImD7gU5jeUoK0=; b=iHV/OkakOF+/zFYe0cH4jkAIs6UEEfmQJlIB5U7OF1ludydnQ47QM9Rs 1BCXI1snHB23N33lhN837ylnGsKqW2RCT3MwKkK9BFCGwdA1VR25yaIn3 ahUkM02SDh+NeLK6xy+Z7dUmiFNSoKD9lL3X3K5vVwqt/1vLZX+3EEgGB 0dkdI0gvArSN8ibY2SityZ+Y8oAoe7OI/7McO+I6CC2Ekyshjo03HNsQT Lgv5sZ42GZhmX4PYk4sAsT/Uw1EDBPN6+zODx6CvyT+kcarvTuPSXT053 F9CKziWTPrShXr5qmYO/JCWOLjUmILr0eNHcKlHiJfNyk3CBWdEeZtpeP g==; Received: from qde8e4.de.t-internal.com ([10.171.255.33]) by MAILOUT11.dmznet.de.t-internal.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Sep 2019 08:50:17 +0200 X-IronPort-AV: E=Sophos;i="5.64,550,1559512800"; d="scan'208";a="635440182" X-MGA-submission: =?us-ascii?q?MDHKPc2EbbQjyuwqzWR4DhHOwiJmjaCs7zZEaA?= =?us-ascii?q?kZ+UpSFmX4DzRrPj/s0e24E6ZVxAoz6qpDkVLdFQEOe+BSWSm8xMh9sh?= =?us-ascii?q?eKh1rnJNuA4eYAG0cZwbjH5EnKDSgZSMnCECOAy6tLHqBWaHq6AfR4b+?= =?us-ascii?q?AkPf5llbSQTsKB56lkICBh9g=3D=3D?= Received: from he105711.emea1.cds.t-internal.com ([10.169.118.42]) by QDE8PP.de.t-internal.com with ESMTP/TLS/AES256-SHA; 26 Sep 2019 08:50:32 +0200 Received: from HE105711.EMEA1.cds.t-internal.com (10.169.118.42) by HE105711.emea1.cds.t-internal.com (10.169.118.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 26 Sep 2019 08:50:31 +0200 Received: from HE104160.emea1.cds.t-internal.com (10.171.40.36) by HE105711.EMEA1.cds.t-internal.com (10.169.118.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Thu, 26 Sep 2019 08:50:31 +0200 Received: from GER01-LEJ-obe.outbound.protection.outlook.de (51.5.80.18) by O365mail03.telekom.de (172.30.0.232) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 26 Sep 2019 08:50:28 +0200 Received: from LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE (10.158.145.12) by LEJPR01MB0108.DEUPRD01.PROD.OUTLOOK.DE (10.158.140.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2284.25; Thu, 26 Sep 2019 06:50:31 +0000 Received: from LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE ([fe80::987d:70fa:4d72:d6da]) by LEJPR01MB1178.DEUPRD01.PROD.OUTLOOK.DE ([fe80::987d:70fa:4d72:d6da%5]) with mapi id 15.20.2284.028; Thu, 26 Sep 2019 06:50:31 +0000 From: To: CC: Thread-Topic: [ippm] How should capacity measurement interact with shaping? 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DB7PR07MB5078.eurprd07.prod.outlook.com (20.177.192.211) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2305.15; Thu, 26 Sep 2019 08:41:23 +0000 Received: from DB7PR07MB5736.eurprd07.prod.outlook.com ([fe80::e48c:a942:9682:2ce4]) by DB7PR07MB5736.eurprd07.prod.outlook.com ([fe80::e48c:a942:9682:2ce4%7]) with mapi id 15.20.2305.017; Thu, 26 Sep 2019 08:41:23 +0000 From: Magnus Westerlund To: "gregimirsky@gmail.com" CC: "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Thread-Topic: Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) Thread-Index: AQHVaBAbqbmUyWu4qEOdjey0JDZTiacmG9IAgACy4wCAB6hCAIAM6RsAgAJcJgA= Date: Thu, 26 Sep 2019 08:41:23 +0000 Message-ID: References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> In-Reply-To: Accept-Language: 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x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: olh7pqaOsAyn3LM4uxszwJ5mHBNOC+ACJ1acp/CGKBxO13OuaCopGAvlNsPGfPJVjmDju/ld7zyAZdy0Nhv41gDQpcenV4a/9yoPUzQPKFMMu+53V2/luXYgIFx9zqb9tKP6kgOK9ji1dhfTcebi/PxUdEoxsv/k5Atzs6iU9YWO5QcNPa/SCjSUybUJBn9hrqroldnwLRoKirC/zd6ZVWikaAv9TiijY7ZoUdeMaLpWL7qcmIAEwmrAZZaeVrgFUm0BnJzHmVDWZy2fPc6DMS+8wPMclTb7lY4ldEpdgJWQc/ud89qbN5JdAV64+mDABUDYPZ3gkOhzD6gRW6QMSFE2aXbY8jd8xr3r03h+kBu2EXnFvbh2+wdQvK3mtxacbmfFEuFbvsoCDkjMXg1lS/NWMJAUGZDDRsJzqt4++N4= x-ms-exchange-transport-forked: True Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-BSDuZmCvAkt4A0WX0iIt" MIME-Version: 1.0 X-OriginatorOrg: ericsson.com X-MS-Exchange-CrossTenant-Network-Message-Id: 28a870cc-2bee-4816-2e8b-08d7425d500d X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Sep 2019 08:41:23.7168 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 92e84ceb-fbfd-47ab-be52-080c6b87953f X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: aLphdeLgakbRBU8gG7oZd7K+erOieReq8PIPve9am+g0jjsnlK1goY2QxL5ZLBEnSHKIZYHs75ErL6e+qZlO27Vnz3xM2QqKK+3raWXOwsI= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR07MB5078 Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Thu, 26 Sep 2019 08:41:36 -0000 --=-BSDuZmCvAkt4A0WX0iIt Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Greg, This clarifies it sufficiently. I have cleared my discuss.=20 Thanks Magnus On Tue, 2019-09-24 at 13:39 -0700, Greg Mirsky wrote: > Hi Magnus, > a new section, Operational Considerations, has been added to address Barr= y's > DISCUSS: >=20 > 5. Operational Considerations >=20 > STAMP is intended to be used on production networks to enable the > operator to assess service level agreements based on packet delay, > delay variation, and loss. When using STAMP over the Internet, > especially when STAMP test packets are transmitted with the > destination UDP port number from the User Ports range, the possible > impact of the STAMP test packets MUST be thoroughly analyzed. The > use of STAMP for each case MUST be agreed by users of nodes hosting > the Session-Sender and Session-Reflector before starting the STAMP > test session. >=20 > Also, the use of the well-known port number as the destination UDP > port number in STAMP test packets transmitted by a Session-Sender > would not impede the ability to measure performance in an Equal Cost > Multipath environment and analysis in Section 5.3 [RFC8545] fully > applies to STAMP. >=20 > Would it address your concern? >=20 > The new version of the draft has been published. It includes all the upda= tes > we've discussed. >=20 > Much appreciate your consideration of the new version, comments, and > questions. >=20 > Kind regards, > Greg >=20 > On Mon, Sep 16, 2019 at 8:29 AM Magnus Westerlund < > magnus.westerlund@ericsson.com> wrote: > > On Wed, 2019-09-11 at 11:33 -0700, Greg Mirsky wrote: > > > Hi Magnus, > > > thank you for clarifications and further detailing your comments, > > > questions. Please find my answers and notes below in-lined under the > > > GIM2>> tag. > > >=20 > > > Regards, > > > Greg > > >=20 > > > On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund < > > > magnus.westerlund@ericsson.com> wrote: > > > > Hi Greg, > > > >=20 > > > > Thanks for the reply. See inline for my comments and response.=20 > > > >=20 > > > >=20 > > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > > > Hi Magnus, > > > > > thank you for the review and thoughtful, pointed questions. > > > > Please > > > > > find my answers in-line under GIM>> tag. > > > > >=20 > > > > > Regards, > > > > > Greg > > > > >=20 > > > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker > > > > < > > > > > noreply@ietf.org> wrote: > > > > > > Magnus Westerlund has entered the following ballot position for > > > > > > draft-ietf-ippm-stamp-07: Discuss > > > > > >=20 > > > > > > When responding, please keep the subject line intact and reply > > > > to > > > > > > all > > > > > > email addresses included in the To and CC lines. (Feel free to > > > > cut > > > > > > this > > > > > > introductory paragraph, however.) > > > > > >=20 > > > > > >=20 > > > > > > Please refer to=20 > > > > > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > > > > > for more information about IESG DISCUSS and COMMENT positions. > > > > > >=20 > > > > > >=20 > > > > > > The document, along with other ballot positions, can be found > > > > here: > > > > > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > > >=20 > > > > > >=20 > > > > > >=20 > > > > > > ------------------------------------------------------------- > > > > ---- > > > > > > ----- > > > > > > DISCUSS: > > > > > > ------------------------------------------------------------- > > > > ---- > > > > > > ----- > > > > > >=20 > > > > > > Two very much discussing discusses. However, I would really > > > > like to > > > > > > hear the > > > > > > answer to these concerns before clearing. > > > > > >=20 > > > > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? > > > > If > > > > > > there ever > > > > > > would exist a need to deploy another integrity solution, even > > > > if > > > > > > the actual > > > > > > algorithm used to construct the tag can be agreed by the > > > > > > management, there > > > > > > appear to exist a hard look in to use 16-byte tags. Have this > > > > issue > > > > > > been > > > > > > considered? > > > > >=20 > > > > > GIM>> Indeed, this specification defines the use of only one > > > > > algorithm and only 16 bytes-long HMAC field. Your question > > > > prompted > > > > > the discussion among authors and we believe that in a future > > > > > specification it would be feasible to extend supporting a number > > > > of > > > > > algorithms and different lengths of HMAC field both being defined > > > > > through extension to STAMP YANG data model. > > > >=20 > > > > So if I understand this (taking a discussion with Mirja about > > > > keeping > > > > things as simple as possible) the solution is to basically is when > > > > need > > > > arises define a new STAMP version, and then use YANG to coordinate > > > > which version is used for the measurement. If that is a correct re- > > > > interpretation of your response then I am fine with it.=20 > > >=20 > > > GIM2>> The direction from the WG was to keep the base specification > > > as simple as possible (and that was the reason to split TLV > > > extensions into a separate document).=20 > >=20 > > Yes, understood.=20 > >=20 > > > > > > 2. Section 6: > > > > > > The possible impact of the > > > > > > STAMP test packets on the network MUST be thoroughly > > > > analyzed, > > > > > > and > > > > > > the use of STAMP for each case MUST be agreed by all users > > > > on > > > > > > the > > > > > > network before starting the STAMP test session. > > > > > >=20 > > > > > > I assume some potential issues are know, shouldn't they > > > > > > really be > > > > > > listed here in the security consideration to further > > > > > > motivate why the > > > > > > analysis needs to happen. > > > > >=20 > > > > > GIM>> This is in reference to using numbers from the User range > > > > as > > > > > the destination port number. Would adding the reference to the > > > > case > > > > > of using the port numbers from the User range address your > > > > concern? > > > > > Or rather refer to Section 4, as it includes more discussion > > > > (see=20 > > > > > below)?=20 > > > >=20 > > > > Okay, I don't really care where the discussion happens. But I don't > > > > find any real discussion and listing of the concerns with using > > > > user or > > > > dynamic ports for STAMP Sessions? With the formulation you use, I > > > > would > > > > expect at least some list of potential concerns that needs to be > > > > evaluated in the context of the particular usage of STAMP.=20 > > >=20 > > > GIM2>> Per Berry's suggestion, I'm adding a new section, Operational > > > Considerations, to list possible scenarios and possible issues with > > > using destination ports from the User range and from the Dynamic > > > range. I hope to finish it in a couple days. Will share on this > > > discussion thread promptly.=20 > >=20 > > Great! > >=20 > > Looking forward to review it when written.=20 > >=20 > > > > > >=20 > > > > > > ------------------------------------------------------------- > > > > ---- > > > > > > ----- > > > > > > COMMENT: > > > > > > ------------------------------------------------------------- > > > > ---- > > > > > > ----- > > > > > >=20 > > > > > > 1. Section 4: > > > > > > Before using numbers from the User Ports range, the > > > > > > possible impact > > > > > > on the network MUST be carefully studied and agreed by all > > > > users > > > > > > of > > > > > > the network. > > > > > >=20 > > > > > > Is the above sentence missing to list an important > > > > > > assumption? Is the > > > > > > assumption that by using the registred destination port > > > > an > > > > > > operator > > > > > > that sees to much STAMP traffic can simply filter it > > > > out > > > > > > and that way > > > > > > deal with the traffic, something which is not possible > > > > when > > > > > > using an > > > > > > locally decided port? If that is the case, this > > > > assumption > > > > > > should > > > > > > probably be noted. > > > > >=20 > > > > > GIM>> That is a very good point but our primary motivation for > > > > this > > > > > cautionary note (or strong warning) was that by allowing STAMP to > > > > use > > > > > port numbers from the User range, ports that may be already > > > > assigned > > > > > to protocols, creates a DDOS attack vector. As for the filtering > > > > > STAMP traffic out, I think that even if the destination port is > > > > one > > > > > from the Dynamic range, for a relatively long test session it can > > > > be > > > > > filtered out. > > > >=20 > > > > So if that is the only? concern then write it out. I would expect > > > > that > > > > the higher layer management protocol that creates a measurement > > > > session > > > > to actually ensure that the STAMP endpoint actually have the port > > > > numbers they attempt to use. Isn't that a reasonable requirement to > > > > put > > > > on the solution?=20 > > >=20 > > > GIM2>> Agree with your suggestion. Will put in the new section. If > > > STAMP is managed by a centralized system, whether it is proprietary > > > OSS/BSS or an orchestrator that uses YANG data models, the system > > > will be able to coordinate selection of port numbers on the Session- > > > Sender and Session-Reflector. But some systems may use EMS or CLI and > > > that is where human coordination may be required.=20 > >=20 > >=20 > > Good, then likely this is resolved when your text is ready.=20 > >=20 > > > > My thinking with the filtering out concern was that in cases where > > > > one > > > > runs STAMP measurement sessions, if the measurement interfer with > > > > critical traffic an action for an on-path node that can actually > > > > identify the STAMP traffic was to filer it out. And that may be > > > > considered trivial when the well known port is used, but if a user > > > > or > > > > dynamic port is used, then that requries a managment system to > > > > provide > > > > the on-path node with the necessary information, i.e. 3/5 tuple for > > > > the > > > > STAMP flows.=20 > > >=20 > > > GIM2>> I think that a transit node can identify a flow as the STAMP > > > flow only if the destination port is the STAMP default UDP > > > destination port number, 862. In case a STAMP session has the > > > destination port number as one of port numbers from the User range, > > > IP/UDP encapsulation of STAMP packets would be indistinguishable from > > > packets originated by the application that is assigned that port > > > number. Thus, filtering out on only destination port number may > > > negatively affect service, legitimate service. Because of that, I > > > think that filtering will have to use more information. On the other > > > hand, if the test flow does not exceed agreed rate, then any > > > filtering test packets out, in my opinion, is counter-productive, as > > > it hides some issues in the networks rather than letting the OAM > > > tools to expose them, localize, and characterize. > >=20 > > Ok. This was primarily to understand if this was in scope or not. But > > it sounds like this is not really in scope for how to manage it.=20 > >=20 > > > >=20 > > > > > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? > > > > Is > > > > > > that a > > > > > > measurment session between one specific and sender and > > > > a > > > > > > specific > > > > > > reflector for a time duration? The defenition of the > > > > > > session do matter > > > > > > if one intended to enable a single sender to use > > > > multiple > > > > > > reflectors, > > > > > > and if that can be a single session or always multiple > > > > > > indepdendent > > > > > > ones. Would appreciate a definition what a session is. > > > > If > > > > > > it is > > > > > > possible to send STAMP traffic using a multicast or > > > > > > broadcast address > > > > > > should be made explicit. > > > > >=20 > > > > > GIM>> Your interpretation is correct, STAMP session is implicitly > > > > > defined as p2p. And that is what reflected in the STAMP YANG > > > > model. > > > > > Would the following text make it clearer: > > > > > NEW TEXT: > > > > > In this document, a measurement session also referred to as > > > > > STAMP session, is the session between one specific Session- > > > > Sender > > > > > and > > > > > one particular Session-Reflector for a time duration. > > > >=20 > > > > Yes, please include that definition. Question would it be clearer > > > > to > > > > replace ".. is the session betweeen .." with ".. is the bi- > > > > directional > > > > packet flows between .."?=20 > > >=20 > > > GIM2>> I agree, defining a session as a session makes is somewhat > > > repetitive. Thank you.=20 > > > Below is the updated text: > > > In this document, a measurement session also referred to as > > > STAMP session, is the bi-directional packet flow between one > > > specific > > > Session-Sender and one particular Session-Reflector for a time > > > duration. > >=20 > > Looks good to me.=20 > >=20 > > > >=20 > > > > > > 3. Section 4.1.1.: > > > > > > Timestamp is eight octets long field. STAMP node MUST > > > > > > support > > > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > > > format > > > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > > > support > > > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > > > timestamp > > > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > >=20 > > > > > > Is the clock source here something that may be relevant > > > > or > > > > > > simply > > > > > > information the management functions should capture. I > > > > > > think there is a > > > > > > similar issue to that of RTP faced when it comes to > > > > > > understand what the > > > > > > timestamp actually represent and thus be used > > > > correctly. > > > > > > RTP clock > > > > > > source specification is RFC 7273 > > > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > >=20 > > > > > GIM>> NTP and PTP encodings have a different interpretation of > > > > the > > > > > Fraction field of the Timestamp field. In my experience, PTP > > > > format > > > > > is native for the data plane, while NTP is more used at the > > > > control > > > > > plane. Original extension to TWAMP has been described in RFC > > > > 8186. > > > >=20 > > > > I think you missunderstood. When I talk about clock source, I am > > > > actually referring to identifying the particular clock that the > > > > node > > > > use to derive the included timestamp from.=20 > > > >=20 > > > > And likely this is a moot point in this document where the clock > > > > source > > > > information belongs in the management layer, e.g. in the YANG data > > > > model.=20 > > >=20 > > > GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-tlv) > > > provides information about the clock synchronization protocol and the > > > method by wich the timestamp has been acquired at a Session- > > > Reflector. We may extend it to list the name/locatior of the master > > > clock. > >=20 > > Ok. sounds reasonable.=20 > >=20 > > > >=20 > > > > > > 4. Section 4.1: > > > > > > Because STAMP supports symmetrical test packets, > > > > STAMP > > > > > > Session-Sender > > > > > > packet has a minimum size of 44 octets in unauthenticated > > > > mode, > > > > > > see > > > > > > Figure 2, and 112 octets in the authenticated mode, see > > > > Figure > > > > > > 4. > > > > > >=20 > > > > > > The above text implies some potential for UDP payload > > > > size > > > > > > variability > > > > > > for the STAMP packets. However, the actual definition > > > > > > appear to have > > > > > > fixed sizes. Can you please clarify if I have missed > > > > > > something that > > > > > > enables the STAMP packet to have variable size? > > > > >=20 > > > > > GIM>> I think that the text can be improved by characterizing the > > > > > listed sizes as "base". The variable length of a test packet in > > > > STAMP > > > > > is supported by using Extra Padding TLV defined in draft-ietf- > > > > ippm- > > > > > stamp-option-tlv. Below is the proposed update: > > > > > OLD TEXT: > > > > > Because STAMP supports symmetrical test packets, STAMP > > > > Session- > > > > > Sender > > > > > packet has a minimum size of 44 octets in unauthenticated > > > > mode, > > > > > see > > > > > Figure 2, and 112 octets in the authenticated mode, see Figure > > > > 4. > > > > > NEW TEXT: > > > > > STAMP supports symmetrical test packets. The base STAMP > > > > Session- > > > > > Sender packet has a minimum size of 44 octets in > > > > unauthenticated > > > > > mode, see Figure 2, and 112 octets in the authenticated mode, > > > > see > > > > > Figure 4. The variable length of a test packet in STAMP is > > > > > supported > > > > > by using Extra Padding TLV defined in > > > > > [I-D.ietf-ippm-stamp-option-tlv]. > > > > >=20 > > > > > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > > > > > moved to the Normative References list or may remain in the > > > > > Informative list? > > > >=20 > > > > From my perspective, the fact that optional TLV may occur following > > > > the > > > > base headers appears quite important. Here comes a question of > > > > intention form the WG. Is it intended that one can have STAMP > > > > endpoints > > > > that do not even support receiving packets larger than the base?= =20 > > > > In other words there will be two main versions already now, one > > > > that > > > > supports some TLV and can at least handle the TLV skip forward and > > > > ignore the content and one that will throw a fit over the TLVs? If > > > > that > > > > is not the intention I think the fact that TLV's may occur should > > > > be > > > > moved into this specification and have it as a normative reference. > > >=20 > > > GIM2>> Will move the reference to the Normative section. With TLV > > > being normative, I'd expect that the intelligent implementation of > > > this draft, of the base STAMP specification, will accept any valid > > > STAMP packet though not process extensions. But the base STAMP > > > Session-Reflector will return the base reflected packet. =20 > >=20 > > I think that is very reasonable approach. Are you close to complete the > > stamp-option-tlv document, or will the missref cause any issue?=20 > >=20 > > > > I guess the answer is that you have backwards comaptibility reasons > > > > for > > > > not allowing TLVs at all in some sessions, or?=20 > > >=20 > > > GIM2>> Yes, that and the principle "keep it simple".=20 > >=20 > > Thanks, > >=20 > > To me it looks like with some text changes all my issues are addressed. > >=20 > > Cheers > >=20 > > Magnus Westerlund=20 > >=20 > >=20 > > ---------------------------------------------------------------------- > > Network Architecture & Protocols, Ericsson Research > > ---------------------------------------------------------------------- > > Ericsson AB | Phone +46 10 7148287 > > Torshamnsgatan 23 | Mobile +46 73 0949079 > > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > > ---------------------------------------------------------------------- > >=20 > >=20 --=20 Cheers Magnus Westerlund=20 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Performance Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 15:00:59 -0000 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 : In-situ OAM IPv6 Options Authors : Shwetha Bhandari Frank Brockners Carlos Pignataro Hannes Gredler John Leddy Stephen Youell Tal Mizrahi Aviv Kfir Barak Gafni Petr Lapukhov Mickey Spiegel Suresh Krishnan Rajiv Asati Filename : draft-ietf-ippm-ioam-ipv6-options-00.txt Pages : 9 Date : 2019-09-26 Abstract: In-situ Operations, Administration, and Maintenance (IOAM) records operational and telemetry information in the packet while the packet traverses a path between two points in the network. This document outlines how IOAM data fields are encapsulated in IPv6. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-ipv6-options/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options-00 https://datatracker.ietf.org/doc/html/draft-ietf-ippm-ioam-ipv6-options-00 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Thu Sep 26 08:08:38 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 472F212088D; Thu, 26 Sep 2019 08:08:35 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.755 X-Spam-Level: X-Spam-Status: No, score=-0.755 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com 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 MMPF1EHi-Q7O; Thu, 26 Sep 2019 08:08:29 -0700 (PDT) Received: from mail-lj1-x229.google.com (mail-lj1-x229.google.com [IPv6:2a00:1450:4864:20::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1BE7C12088E; Thu, 26 Sep 2019 08:08:23 -0700 (PDT) Received: by mail-lj1-x229.google.com with SMTP id q64so2529981ljb.12; Thu, 26 Sep 2019 08:08:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=bFzD0C0CHy1rasABY/DenB8BTZUAKVXrbLHTTN0kAc4=; b=PjGX3m//IXfvOtZR36NWVeFwFyk2AaScXyKi2mlzyemtWauQTmGIZiq3wyPADulKJD sa9crB4Erteb5FtdUyQ+RIBf3q95MDnwNJY7+3WKUBycPsgeXA0Uxs13DR8o3NGlPuhs 6QfSQEysNSkeNsAiFzSg44Gp9C3LmCXBSnnmbkO3NNMJHM2zuJFZIuEsaWods/W63UY1 3Cu+2Mz/dsvn7LirNOsMg6wGx1BpWyoaFPtFaAg1qQlkwLv3p/I2bqlEhXxusGNdr+k6 QIJkwEJ7Xdpz1+tG3p9SC4KuYtT4e5CzHmE08NtjTTq8sM8+RHGF7IddKzySKPFYUZWg CdtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=bFzD0C0CHy1rasABY/DenB8BTZUAKVXrbLHTTN0kAc4=; b=BYRDLAFY6vr/JJionyEwLk7ckKSctE82JwJPDewa62EJkmUD0yW2SpbEhEult9ABSr 5IKjmiZeuJHIAYaozA4TS+EJCusbIboTEAVpFImYmRHszQkjsNQJPMt0Ms38NmZZ2/8i C3C3947w4dkDQPt+mfCi99ugE+qLl3xueBgTeEEDPzdvJ91Rmk/ojBdT7Ntccn44SHeo 7lkwDziCCUorRJEBfDK2iBt+nuDMbUTVg2CHnm0cKvUEl9NCUqkhZ2BF3YxKhUQtWRt4 Im9QNkP2CYyCCDl5XURr2ZCpctFE3eI2+SaVZrRk4SFRq27JildwEf693MepFB7jr0+X 9s7w== X-Gm-Message-State: APjAAAWGMwmyUuzaZIkfEM2nlaUUWqXrQRIDEtEZhVpUSWMkhLT/v1tO 3LioA97yoU5d6ajMMTLcv9DKzA0Tg1+axV1rlkg= X-Google-Smtp-Source: APXvYqy+RqrL3Rd1f0U0gXY9Yrz6/tT7cQj1Qxf63H9JB+K93GRuSsevk3VvP9JyNs5LAifQ+8ounzCu5pFTPFrcqSI= X-Received: by 2002:a2e:5d98:: with SMTP id v24mr3097616lje.56.1569510501099; Thu, 26 Sep 2019 08:08:21 -0700 (PDT) MIME-Version: 1.0 References: <156760524845.22816.16339950342338392164.idtracker@ietfa.amsl.com> <06fcd3bea80067202534aa70857194b2e4335d3f.camel@ericsson.com> In-Reply-To: From: Greg Mirsky Date: Thu, 26 Sep 2019 08:08:10 -0700 Message-ID: To: Magnus Westerlund Cc: "draft-ietf-ippm-stamp@ietf.org" , "iesg@ietf.org" , "tal.mizrahi.phd@gmail.com" , "ippm-chairs@ietf.org" , "ippm@ietf.org" Content-Type: multipart/alternative; boundary="000000000000e3b35a05937623be" Archived-At: Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-stamp-07: (with DISCUSS and COMMENT) X-BeenThere: ippm@ietf.org 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: Thu, 26 Sep 2019 15:08:36 -0000 --000000000000e3b35a05937623be Content-Type: text/plain; charset="UTF-8" Hi Magnus, thank you for all your comments, discussion, and patience. Kind regards, Greg On Thu, Sep 26, 2019 at 1:41 AM Magnus Westerlund < magnus.westerlund@ericsson.com> wrote: > Hi Greg, > > This clarifies it sufficiently. I have cleared my discuss. > > Thanks > > Magnus > > On Tue, 2019-09-24 at 13:39 -0700, Greg Mirsky wrote: > > Hi Magnus, > > a new section, Operational Considerations, has been added to address > Barry's > > DISCUSS: > > > > 5. Operational Considerations > > > > STAMP is intended to be used on production networks to enable the > > operator to assess service level agreements based on packet delay, > > delay variation, and loss. When using STAMP over the Internet, > > especially when STAMP test packets are transmitted with the > > destination UDP port number from the User Ports range, the possible > > impact of the STAMP test packets MUST be thoroughly analyzed. The > > use of STAMP for each case MUST be agreed by users of nodes hosting > > the Session-Sender and Session-Reflector before starting the STAMP > > test session. > > > > Also, the use of the well-known port number as the destination UDP > > port number in STAMP test packets transmitted by a Session-Sender > > would not impede the ability to measure performance in an Equal Cost > > Multipath environment and analysis in Section 5.3 [RFC8545] fully > > applies to STAMP. > > > > Would it address your concern? > > > > The new version of the draft has been published. It includes all the > updates > > we've discussed. > > > > Much appreciate your consideration of the new version, comments, and > > questions. > > > > Kind regards, > > Greg > > > > On Mon, Sep 16, 2019 at 8:29 AM Magnus Westerlund < > > magnus.westerlund@ericsson.com> wrote: > > > On Wed, 2019-09-11 at 11:33 -0700, Greg Mirsky wrote: > > > > Hi Magnus, > > > > thank you for clarifications and further detailing your comments, > > > > questions. Please find my answers and notes below in-lined under the > > > > GIM2>> tag. > > > > > > > > Regards, > > > > Greg > > > > > > > > On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund < > > > > magnus.westerlund@ericsson.com> wrote: > > > > > Hi Greg, > > > > > > > > > > Thanks for the reply. See inline for my comments and response. > > > > > > > > > > > > > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > > > > Hi Magnus, > > > > > > thank you for the review and thoughtful, pointed questions. > > > > > Please > > > > > > find my answers in-line under GIM>> tag. > > > > > > > > > > > > Regards, > > > > > > Greg > > > > > > > > > > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund via Datatracker > > > > > < > > > > > > noreply@ietf.org> wrote: > > > > > > > Magnus Westerlund has entered the following ballot position for > > > > > > > draft-ietf-ippm-stamp-07: Discuss > > > > > > > > > > > > > > When responding, please keep the subject line intact and reply > > > > > to > > > > > > > all > > > > > > > email addresses included in the To and CC lines. (Feel free to > > > > > cut > > > > > > > this > > > > > > > introductory paragraph, however.) > > > > > > > > > > > > > > > > > > > > > Please refer to > > > > > > > https://www.ietf.org/iesg/statement/discuss-criteria.html > > > > > > > for more information about IESG DISCUSS and COMMENT positions. > > > > > > > > > > > > > > > > > > > > > The document, along with other ballot positions, can be found > > > > > here: > > > > > > > https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------- > > > > > ---- > > > > > > > ----- > > > > > > > DISCUSS: > > > > > > > ------------------------------------------------------------- > > > > > ---- > > > > > > > ----- > > > > > > > > > > > > > > Two very much discussing discusses. However, I would really > > > > > like to > > > > > > > hear the > > > > > > > answer to these concerns before clearing. > > > > > > > > > > > > > > 1. Section 4.3: Is the HMAC field size of 16 bytes hard coded? > > > > > If > > > > > > > there ever > > > > > > > would exist a need to deploy another integrity solution, even > > > > > if > > > > > > > the actual > > > > > > > algorithm used to construct the tag can be agreed by the > > > > > > > management, there > > > > > > > appear to exist a hard look in to use 16-byte tags. Have this > > > > > issue > > > > > > > been > > > > > > > considered? > > > > > > > > > > > > GIM>> Indeed, this specification defines the use of only one > > > > > > algorithm and only 16 bytes-long HMAC field. Your question > > > > > prompted > > > > > > the discussion among authors and we believe that in a future > > > > > > specification it would be feasible to extend supporting a number > > > > > of > > > > > > algorithms and different lengths of HMAC field both being defined > > > > > > through extension to STAMP YANG data model. > > > > > > > > > > So if I understand this (taking a discussion with Mirja about > > > > > keeping > > > > > things as simple as possible) the solution is to basically is when > > > > > need > > > > > arises define a new STAMP version, and then use YANG to coordinate > > > > > which version is used for the measurement. If that is a correct re- > > > > > interpretation of your response then I am fine with it. > > > > > > > > GIM2>> The direction from the WG was to keep the base specification > > > > as simple as possible (and that was the reason to split TLV > > > > extensions into a separate document). > > > > > > Yes, understood. > > > > > > > > > > 2. Section 6: > > > > > > > The possible impact of the > > > > > > > STAMP test packets on the network MUST be thoroughly > > > > > analyzed, > > > > > > > and > > > > > > > the use of STAMP for each case MUST be agreed by all users > > > > > on > > > > > > > the > > > > > > > network before starting the STAMP test session. > > > > > > > > > > > > > > I assume some potential issues are know, shouldn't they > > > > > > > really be > > > > > > > listed here in the security consideration to further > > > > > > > motivate why the > > > > > > > analysis needs to happen. > > > > > > > > > > > > GIM>> This is in reference to using numbers from the User range > > > > > as > > > > > > the destination port number. Would adding the reference to the > > > > > case > > > > > > of using the port numbers from the User range address your > > > > > concern? > > > > > > Or rather refer to Section 4, as it includes more discussion > > > > > (see > > > > > > below)? > > > > > > > > > > Okay, I don't really care where the discussion happens. But I don't > > > > > find any real discussion and listing of the concerns with using > > > > > user or > > > > > dynamic ports for STAMP Sessions? With the formulation you use, I > > > > > would > > > > > expect at least some list of potential concerns that needs to be > > > > > evaluated in the context of the particular usage of STAMP. > > > > > > > > GIM2>> Per Berry's suggestion, I'm adding a new section, Operational > > > > Considerations, to list possible scenarios and possible issues with > > > > using destination ports from the User range and from the Dynamic > > > > range. I hope to finish it in a couple days. Will share on this > > > > discussion thread promptly. > > > > > > Great! > > > > > > Looking forward to review it when written. > > > > > > > > > > > > > > > > > ------------------------------------------------------------- > > > > > ---- > > > > > > > ----- > > > > > > > COMMENT: > > > > > > > ------------------------------------------------------------- > > > > > ---- > > > > > > > ----- > > > > > > > > > > > > > > 1. Section 4: > > > > > > > Before using numbers from the User Ports range, the > > > > > > > possible impact > > > > > > > on the network MUST be carefully studied and agreed by all > > > > > users > > > > > > > of > > > > > > > the network. > > > > > > > > > > > > > > Is the above sentence missing to list an important > > > > > > > assumption? Is the > > > > > > > assumption that by using the registred destination port > > > > > an > > > > > > > operator > > > > > > > that sees to much STAMP traffic can simply filter it > > > > > out > > > > > > > and that way > > > > > > > deal with the traffic, something which is not possible > > > > > when > > > > > > > using an > > > > > > > locally decided port? If that is the case, this > > > > > assumption > > > > > > > should > > > > > > > probably be noted. > > > > > > > > > > > > GIM>> That is a very good point but our primary motivation for > > > > > this > > > > > > cautionary note (or strong warning) was that by allowing STAMP to > > > > > use > > > > > > port numbers from the User range, ports that may be already > > > > > assigned > > > > > > to protocols, creates a DDOS attack vector. As for the filtering > > > > > > STAMP traffic out, I think that even if the destination port is > > > > > one > > > > > > from the Dynamic range, for a relatively long test session it can > > > > > be > > > > > > filtered out. > > > > > > > > > > So if that is the only? concern then write it out. I would expect > > > > > that > > > > > the higher layer management protocol that creates a measurement > > > > > session > > > > > to actually ensure that the STAMP endpoint actually have the port > > > > > numbers they attempt to use. Isn't that a reasonable requirement to > > > > > put > > > > > on the solution? > > > > > > > > GIM2>> Agree with your suggestion. Will put in the new section. If > > > > STAMP is managed by a centralized system, whether it is proprietary > > > > OSS/BSS or an orchestrator that uses YANG data models, the system > > > > will be able to coordinate selection of port numbers on the Session- > > > > Sender and Session-Reflector. But some systems may use EMS or CLI and > > > > that is where human coordination may be required. > > > > > > > > > Good, then likely this is resolved when your text is ready. > > > > > > > > My thinking with the filtering out concern was that in cases where > > > > > one > > > > > runs STAMP measurement sessions, if the measurement interfer with > > > > > critical traffic an action for an on-path node that can actually > > > > > identify the STAMP traffic was to filer it out. And that may be > > > > > considered trivial when the well known port is used, but if a user > > > > > or > > > > > dynamic port is used, then that requries a managment system to > > > > > provide > > > > > the on-path node with the necessary information, i.e. 3/5 tuple for > > > > > the > > > > > STAMP flows. > > > > > > > > GIM2>> I think that a transit node can identify a flow as the STAMP > > > > flow only if the destination port is the STAMP default UDP > > > > destination port number, 862. In case a STAMP session has the > > > > destination port number as one of port numbers from the User range, > > > > IP/UDP encapsulation of STAMP packets would be indistinguishable from > > > > packets originated by the application that is assigned that port > > > > number. Thus, filtering out on only destination port number may > > > > negatively affect service, legitimate service. Because of that, I > > > > think that filtering will have to use more information. On the other > > > > hand, if the test flow does not exceed agreed rate, then any > > > > filtering test packets out, in my opinion, is counter-productive, as > > > > it hides some issues in the networks rather than letting the OAM > > > > tools to expose them, localize, and characterize. > > > > > > Ok. This was primarily to understand if this was in scope or not. But > > > it sounds like this is not really in scope for how to manage it. > > > > > > > > > > > > > > > 2. Section 3 and 4, and 4.1.1: What is a STAMP Session? > > > > > Is > > > > > > > that a > > > > > > > measurment session between one specific and sender and > > > > > a > > > > > > > specific > > > > > > > reflector for a time duration? The defenition of the > > > > > > > session do matter > > > > > > > if one intended to enable a single sender to use > > > > > multiple > > > > > > > reflectors, > > > > > > > and if that can be a single session or always multiple > > > > > > > indepdendent > > > > > > > ones. Would appreciate a definition what a session is. > > > > > If > > > > > > > it is > > > > > > > possible to send STAMP traffic using a multicast or > > > > > > > broadcast address > > > > > > > should be made explicit. > > > > > > > > > > > > GIM>> Your interpretation is correct, STAMP session is implicitly > > > > > > defined as p2p. And that is what reflected in the STAMP YANG > > > > > model. > > > > > > Would the following text make it clearer: > > > > > > NEW TEXT: > > > > > > In this document, a measurement session also referred to as > > > > > > STAMP session, is the session between one specific Session- > > > > > Sender > > > > > > and > > > > > > one particular Session-Reflector for a time duration. > > > > > > > > > > Yes, please include that definition. Question would it be clearer > > > > > to > > > > > replace ".. is the session betweeen .." with ".. is the bi- > > > > > directional > > > > > packet flows between .."? > > > > > > > > GIM2>> I agree, defining a session as a session makes is somewhat > > > > repetitive. Thank you. > > > > Below is the updated text: > > > > In this document, a measurement session also referred to as > > > > STAMP session, is the bi-directional packet flow between one > > > > specific > > > > Session-Sender and one particular Session-Reflector for a time > > > > duration. > > > > > > Looks good to me. > > > > > > > > > > > > > > > 3. Section 4.1.1.: > > > > > > > Timestamp is eight octets long field. STAMP node MUST > > > > > > > support > > > > > > > Network Time Protocol (NTP) version 4 64-bit timestamp > > > > > format > > > > > > > [RFC5905], the format used in [RFC5357]. STAMP node MAY > > > > > > > support > > > > > > > IEEE 1588v2 Precision Time Protocol truncated 64-bit > > > > > > > timestamp > > > > > > > format [IEEE.1588.2008], the format used in [RFC8186]. > > > > > > > > > > > > > > Is the clock source here something that may be relevant > > > > > or > > > > > > > simply > > > > > > > information the management functions should capture. I > > > > > > > think there is a > > > > > > > similar issue to that of RTP faced when it comes to > > > > > > > understand what the > > > > > > > timestamp actually represent and thus be used > > > > > correctly. > > > > > > > RTP clock > > > > > > > source specification is RFC 7273 > > > > > > > (https://datatracker.ietf.org/doc/rfc7273/) > > > > > > > > > > > > GIM>> NTP and PTP encodings have a different interpretation of > > > > > the > > > > > > Fraction field of the Timestamp field. In my experience, PTP > > > > > format > > > > > > is native for the data plane, while NTP is more used at the > > > > > control > > > > > > plane. Original extension to TWAMP has been described in RFC > > > > > 8186. > > > > > > > > > > I think you missunderstood. When I talk about clock source, I am > > > > > actually referring to identifying the particular clock that the > > > > > node > > > > > use to derive the included timestamp from. > > > > > > > > > > And likely this is a moot point in this document where the clock > > > > > source > > > > > information belongs in the management layer, e.g. in the YANG data > > > > > model. > > > > > > > > GIM2>> Timestamp Information TLV (draft-ietf-ippm-stamp-option-tlv) > > > > provides information about the clock synchronization protocol and the > > > > method by wich the timestamp has been acquired at a Session- > > > > Reflector. We may extend it to list the name/locatior of the master > > > > clock. > > > > > > Ok. sounds reasonable. > > > > > > > > > > > > > > > 4. Section 4.1: > > > > > > > Because STAMP supports symmetrical test packets, > > > > > STAMP > > > > > > > Session-Sender > > > > > > > packet has a minimum size of 44 octets in unauthenticated > > > > > mode, > > > > > > > see > > > > > > > Figure 2, and 112 octets in the authenticated mode, see > > > > > Figure > > > > > > > 4. > > > > > > > > > > > > > > The above text implies some potential for UDP payload > > > > > size > > > > > > > variability > > > > > > > for the STAMP packets. However, the actual definition > > > > > > > appear to have > > > > > > > fixed sizes. Can you please clarify if I have missed > > > > > > > something that > > > > > > > enables the STAMP packet to have variable size? > > > > > > > > > > > > GIM>> I think that the text can be improved by characterizing the > > > > > > listed sizes as "base". The variable length of a test packet in > > > > > STAMP > > > > > > is supported by using Extra Padding TLV defined in draft-ietf- > > > > > ippm- > > > > > > stamp-option-tlv. Below is the proposed update: > > > > > > OLD TEXT: > > > > > > Because STAMP supports symmetrical test packets, STAMP > > > > > Session- > > > > > > Sender > > > > > > packet has a minimum size of 44 octets in unauthenticated > > > > > mode, > > > > > > see > > > > > > Figure 2, and 112 octets in the authenticated mode, see Figure > > > > > 4. > > > > > > NEW TEXT: > > > > > > STAMP supports symmetrical test packets. The base STAMP > > > > > Session- > > > > > > Sender packet has a minimum size of 44 octets in > > > > > unauthenticated > > > > > > mode, see Figure 2, and 112 octets in the authenticated mode, > > > > > see > > > > > > Figure 4. The variable length of a test packet in STAMP is > > > > > > supported > > > > > > by using Extra Padding TLV defined in > > > > > > [I-D.ietf-ippm-stamp-option-tlv]. > > > > > > > > > > > > With the new reference, should I-D.ietf-ippm-stamp-option-tlv be > > > > > > moved to the Normative References list or may remain in the > > > > > > Informative list? > > > > > > > > > > From my perspective, the fact that optional TLV may occur following > > > > > the > > > > > base headers appears quite important. Here comes a question of > > > > > intention form the WG. Is it intended that one can have STAMP > > > > > endpoints > > > > > that do not even support receiving packets larger than the base? > > > > > In other words there will be two main versions already now, one > > > > > that > > > > > supports some TLV and can at least handle the TLV skip forward and > > > > > ignore the content and one that will throw a fit over the TLVs? If > > > > > that > > > > > is not the intention I think the fact that TLV's may occur should > > > > > be > > > > > moved into this specification and have it as a normative reference. > > > > > > > > GIM2>> Will move the reference to the Normative section. With TLV > > > > being normative, I'd expect that the intelligent implementation of > > > > this draft, of the base STAMP specification, will accept any valid > > > > STAMP packet though not process extensions. But the base STAMP > > > > Session-Reflector will return the base reflected packet. > > > > > > I think that is very reasonable approach. Are you close to complete the > > > stamp-option-tlv document, or will the missref cause any issue? > > > > > > > > I guess the answer is that you have backwards comaptibility reasons > > > > > for > > > > > not allowing TLVs at all in some sessions, or? > > > > > > > > GIM2>> Yes, that and the principle "keep it simple". > > > > > > Thanks, > > > > > > To me it looks like with some text changes all my issues are addressed. > > > > > > Cheers > > > > > > Magnus Westerlund > > > > > > > > > ---------------------------------------------------------------------- > > > Network Architecture & Protocols, Ericsson Research > > > ---------------------------------------------------------------------- > > > Ericsson AB | Phone +46 10 7148287 > > > Torshamnsgatan 23 | Mobile +46 73 0949079 > > > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > > > ---------------------------------------------------------------------- > > > > > > > -- > Cheers > > Magnus Westerlund > > > ---------------------------------------------------------------------- > Network Architecture & Protocols, Ericsson Research > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Torshamnsgatan 23 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > > --000000000000e3b35a05937623be Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Magnus,
thank you for all your comments, discussion= , and patience.

Kind regards,
Greg
=

= On Thu, Sep 26, 2019 at 1:41 AM Magnus Westerlund <magnus.westerlund@ericsson.com> wrote:<= br>
Hi Greg,

This clarifies it sufficiently. I have cleared my discuss.

Thanks

Magnus

On Tue, 2019-09-24 at 13:39 -0700, Greg Mirsky wrote:
> Hi Magnus,
> a new section, Operational Considerations, has been added to address B= arry's
> DISCUSS:
>
> 5.=C2=A0 Operational Considerations
>
>=C2=A0 =C2=A0 STAMP is intended to be used on production networks to en= able the
>=C2=A0 =C2=A0 operator to assess service level agreements based on pack= et delay,
>=C2=A0 =C2=A0 delay variation, and loss.=C2=A0 When using STAMP over th= e Internet,
>=C2=A0 =C2=A0 especially when STAMP test packets are transmitted with t= he
>=C2=A0 =C2=A0 destination UDP port number from the User Ports range, th= e possible
>=C2=A0 =C2=A0 impact of the STAMP test packets MUST be thoroughly analy= zed.=C2=A0 The
>=C2=A0 =C2=A0 use of STAMP for each case MUST be agreed by users of nod= es hosting
>=C2=A0 =C2=A0 the Session-Sender and Session-Reflector before starting = the STAMP
>=C2=A0 =C2=A0 test session.
>
>=C2=A0 =C2=A0 Also, the use of the well-known port number as the destin= ation UDP
>=C2=A0 =C2=A0 port number in STAMP test packets transmitted by a Sessio= n-Sender
>=C2=A0 =C2=A0 would not impede the ability to measure performance in an= Equal Cost
>=C2=A0 =C2=A0 Multipath environment and analysis in Section 5.3 [RFC854= 5] fully
>=C2=A0 =C2=A0 applies to STAMP.
>
> Would it address your concern?
>
> The new version of the draft has been published. It includes all the u= pdates
> we've discussed.
>
> Much appreciate your consideration of the new version, comments, and > questions.
>
> Kind regards,
> Greg
>
> On Mon, Sep 16, 2019 at 8:29 AM Magnus Westerlund <
> ma= gnus.westerlund@ericsson.com> wrote:
> > On Wed, 2019-09-11 at 11:33 -0700, Greg Mirsky wrote:
> > > Hi Magnus,
> > > thank you for clarifications and further detailing your comm= ents,
> > > questions. Please find my answers and notes below in-lined u= nder the
> > > GIM2>> tag.
> > >
> > > Regards,
> > > Greg
> > >
> > > On Wed, Sep 11, 2019 at 12:53 AM Magnus Westerlund <
> > > magnus.westerlund@ericsson.com> wrote:
> > > > Hi Greg,
> > > >
> > > > Thanks for the reply. See inline for my comments and re= sponse.
> > > >
> > > >
> > > > On Tue, 2019-09-10 at 12:43 -0700, Greg Mirsky wrote: > > > > > Hi Magnus,
> > > > > thank you for the review and thoughtful, pointed q= uestions.
> > > > Please
> > > > > find my answers in-line under GIM>> tag.
> > > > >
> > > > > Regards,
> > > > > Greg
> > > > >
> > > > > On Wed, Sep 4, 2019 at 3:54 PM Magnus Westerlund v= ia Datatracker
> > > > <
> > > > > noreply@ietf.org> wrote:
> > > > > > Magnus Westerlund has entered the following b= allot position for
> > > > > > draft-ietf-ippm-stamp-07: Discuss
> > > > > >
> > > > > > When responding, please keep the subject line= intact and reply
> > > > to
> > > > > > all
> > > > > > email addresses included in the To and CC lin= es. (Feel free to
> > > > cut
> > > > > > this
> > > > > > introductory paragraph, however.)
> > > > > >
> > > > > >
> > > > > > Please refer to
> > > > > > https://www.i= etf.org/iesg/statement/discuss-criteria.html
> > > > > > for more information about IESG DISCUSS and C= OMMENT positions.
> > > > > >
> > > > > >
> > > > > > The document, along with other ballot positio= ns, can be found
> > > > here:
> > > > > > https://datatra= cker.ietf.org/doc/draft-ietf-ippm-stamp/
> > > > > >
> > > > > >
> > > > > >
> > > > > > ---------------------------------------------= ----------------
> > > > ----
> > > > > > -----
> > > > > > DISCUSS:
> > > > > > ---------------------------------------------= ----------------
> > > > ----
> > > > > > -----
> > > > > >
> > > > > > Two very much discussing discusses. However, = I would really
> > > > like to
> > > > > > hear the
> > > > > > answer to these concerns before clearing.
> > > > > >
> > > > > > 1. Section 4.3: Is the HMAC field size of 16 = bytes hard coded?
> > > > If
> > > > > > there ever
> > > > > > would exist a need to deploy another integrit= y solution, even
> > > > if
> > > > > > the actual
> > > > > > algorithm used to construct the tag can be ag= reed by the
> > > > > > management, there
> > > > > > appear to exist a hard look in to use 16-byte= tags. Have this
> > > > issue
> > > > > > been
> > > > > > considered?
> > > > >
> > > > > GIM>> Indeed, this specification defines the= use of only one
> > > > > algorithm and only 16 bytes-long HMAC field. Your = question
> > > > prompted
> > > > > the discussion among authors and we believe that i= n a future
> > > > > specification it would be feasible to extend suppo= rting a number
> > > > of
> > > > > algorithms and different lengths of HMAC field bot= h being defined
> > > > > through extension to STAMP YANG data model.
> > > >
> > > > So if I understand this (taking a discussion with Mirja= about
> > > > keeping
> > > > things as simple as possible) the solution is to basica= lly is when
> > > > need
> > > > arises define a new STAMP version, and then use YANG to= coordinate
> > > > which version is used for the measurement. If that is a= correct re-
> > > > interpretation of your response then I am fine with it.=
> > >
> > > GIM2>> The direction from the WG was to keep the base = specification
> > > as simple=C2=A0 as possible (and that was the reason to spli= t TLV
> > > extensions into a separate document).
> >
> > Yes, understood.
> >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 6= :
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The possible= impact of the
> > > > > >=C2=A0 =C2=A0 STAMP test packets on the networ= k MUST be thoroughly
> > > > analyzed,
> > > > > > and
> > > > > >=C2=A0 =C2=A0 the use of STAMP for each case M= UST be agreed by all users
> > > > on
> > > > > > the
> > > > > >=C2=A0 =C2=A0 network before starting the STAM= P test session.
> > > > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0I assume som= e potential issues are know, shouldn't they
> > > > > > really be
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0listed here = in the security consideration to further
> > > > > > motivate why the
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0analysis nee= ds to happen.
> > > > >
> > > > > GIM>> This is in reference to using numbers = from the User range
> > > > as
> > > > > the destination port number. Would adding the refe= rence to the
> > > > case
> > > > > of using the port numbers from the User range addr= ess your
> > > > concern?
> > > > > Or rather refer to Section 4, as it includes more = discussion
> > > > (see
> > > > > below)?
> > > >
> > > > Okay, I don't really care where the discussion happ= ens. But I don't
> > > > find any real discussion and listing of the concerns wi= th using
> > > > user or
> > > > dynamic ports for STAMP Sessions? With the formulation = you use, I
> > > > would
> > > > expect at least some list of potential concerns that ne= eds to be
> > > > evaluated in the context of the particular usage of STA= MP.
> > >
> > > GIM2>> Per Berry's suggestion, I'm adding a ne= w section, Operational
> > > Considerations, to list possible scenarios and possible issu= es with
> > > using destination ports from the User range and from the Dyn= amic
> > > range. I hope to finish it in a couple days. Will share on t= his
> > > discussion thread promptly.
> >
> > Great!
> >
> > Looking forward to review it when written.
> >
> > > > > >
> > > > > > ---------------------------------------------= ----------------
> > > > ----
> > > > > > -----
> > > > > > COMMENT:
> > > > > > ---------------------------------------------= ----------------
> > > > ----
> > > > > > -----
> > > > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01. Section 4= :
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Before using= numbers from the User Ports range, the
> > > > > > possible impact
> > > > > >=C2=A0 =C2=A0 on the network MUST be carefully= studied and agreed by all
> > > > users
> > > > > > of
> > > > > >=C2=A0 =C2=A0 the network.
> > > > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the above= sentence missing to list an important
> > > > > > assumption? Is the
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0assumption t= hat by using the registred destination port
> > > > an
> > > > > > operator
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that sees to= much STAMP traffic can simply filter it
> > > > out
> > > > > > and that way
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0deal with th= e traffic, something which is not possible
> > > > when
> > > > > > using an
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0locally deci= ded port? If that is the case, this
> > > > assumption
> > > > > > should
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0probably be = noted.
> > > > >
> > > > > GIM>> That is a very good point but our prim= ary motivation for
> > > > this
> > > > > cautionary note (or strong warning) was that by al= lowing STAMP to
> > > > use
> > > > > port numbers from the User range, ports that may b= e already
> > > > assigned
> > > > > to protocols, creates a DDOS attack vector. As for= the filtering
> > > > > STAMP traffic out, I think that even if the destin= ation port is
> > > > one
> > > > > from the Dynamic range, for a relatively long test= session it can
> > > > be
> > > > > filtered out.
> > > >
> > > > So if that is the only? concern then write it out. I wo= uld expect
> > > > that
> > > > the higher layer management protocol that creates a mea= surement
> > > > session
> > > > to actually ensure that the STAMP endpoint actually hav= e the port
> > > > numbers they attempt to use. Isn't that a reasonabl= e requirement to
> > > > put
> > > > on the solution?
> > >
> > > GIM2>> Agree with your suggestion. Will put in the new= section. If
> > > STAMP is managed by a centralized system, whether it is prop= rietary
> > > OSS/BSS or an orchestrator that uses YANG data models, the s= ystem
> > > will be able to coordinate selection of port numbers on the = Session-
> > > Sender and Session-Reflector. But some systems may use EMS o= r CLI and
> > > that is where human coordination may be required.
> >
> >
> > Good, then likely this is resolved when your text is ready.
> >
> > > > My thinking with the filtering out concern was that in = cases where
> > > > one
> > > > runs STAMP measurement sessions, if the measurement int= erfer with
> > > > critical traffic an action for an on-path node that can= actually
> > > > identify the STAMP traffic was to filer it out. And tha= t may be
> > > > considered trivial when the well known port is used, bu= t if a user
> > > > or
> > > > dynamic port is used, then that requries a managment sy= stem to
> > > > provide
> > > > the on-path node with the necessary information, i.e. 3= /5 tuple for
> > > > the
> > > > STAMP flows.
> > >
> > > GIM2>> I think that a transit node can identify a flow= as the STAMP
> > > flow only if the destination port is the STAMP default UDP > > > destination port number, 862. In case a STAMP session has th= e
> > > destination port number as one of port numbers from the User= range,
> > > IP/UDP encapsulation of STAMP packets would be indistinguish= able from
> > > packets originated by the application that is assigned that = port
> > > number. Thus, filtering out on only destination port number = may
> > > negatively affect service, legitimate service. Because of th= at, I
> > > think that filtering will have to use more information. On t= he other
> > > hand, if the test flow does not exceed agreed rate, then any=
> > > filtering test packets out, in my opinion, is counter-produc= tive, as
> > > it hides some issues in the networks rather than letting the= OAM
> > > tools to expose them, localize, and characterize.
> >
> > Ok. This was primarily to understand if this was in scope or not.= But
> > it sounds like this is not really in scope for how to manage it. =
> >
> > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Section 3= and 4, and 4.1.1: What is a STAMP Session?
> > > > Is
> > > > > > that a
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0measurment s= ession between one specific and sender and
> > > > a
> > > > > > specific
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0reflector fo= r a time duration?=C2=A0 The defenition of the
> > > > > > session do matter
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0if one inten= ded to enable a single sender to use
> > > > multiple
> > > > > > reflectors,
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0and if that = can be a single session or always multiple
> > > > > > indepdendent
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ones. Would = appreciate a definition what a session is.
> > > > If
> > > > > > it is
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0possible to = send STAMP traffic using a multicast or
> > > > > > broadcast address
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0should be ma= de explicit.
> > > > >
> > > > > GIM>> Your interpretation is correct, STAMP = session is implicitly
> > > > > defined as p2p. And that is what reflected in the = STAMP YANG
> > > > model.
> > > > > Would the following text make it clearer:
> > > > > NEW TEXT:
> > > > >=C2=A0 =C2=A0 In this document, a measurement sessi= on also referred to as
> > > > >=C2=A0 =C2=A0 STAMP session, is the session between= one specific Session-
> > > > Sender
> > > > > and
> > > > >=C2=A0 =C2=A0 one particular Session-Reflector for = a time duration.
> > > >
> > > > Yes, please include that definition. Question would it = be clearer
> > > > to
> > > > replace ".. is the session betweeen .." with = ".. is the bi-
> > > > directional
> > > > packet flows between .."?
> > >
> > > GIM2>> I agree, defining a session as a session makes = is somewhat
> > > repetitive. Thank you.
> > > Below is the updated text:
> > >=C2=A0 =C2=A0 In this document, a measurement session also re= ferred to as
> > >=C2=A0 =C2=A0 STAMP session, is the bi-directional packet flo= w between one
> > > specific
> > >=C2=A0 =C2=A0 Session-Sender and one particular Session-Refle= ctor for a time
> > >=C2=A0 =C2=A0 duration.
> >
> > Looks good to me.
> >
> > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03.=C2=A0 Sec= tion 4.1.1.<= /a>:
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Timestamp is= eight octets long field.=C2=A0 STAMP node MUST
> > > > > > support
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0Network Time Protoc= ol (NTP) version 4 64-bit timestamp
> > > > format
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0[RFC5905], the form= at used in [RFC5357].=C2=A0 STAMP node MAY
> > > > > > support
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0IEEE 1588v2 Precisi= on Time Protocol truncated 64-bit
> > > > > > timestamp
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0format [IEEE.1588.2= 008], the format used in [RFC8186].
> > > > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Is the clock= source here something that may be relevant
> > > > or
> > > > > > simply
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0information = the management functions should capture. I
> > > > > > think there is a
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0similar issu= e to that of RTP faced when it comes to
> > > > > > understand what the
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0timestamp ac= tually represent and thus be used
> > > > correctly.
> > > > > > RTP clock
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0source speci= fication is RFC 7273
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(https://datatracker.ietf.org/doc/rfc7273/)
> > > > >
> > > > > GIM>> NTP and PTP encodings have a different= interpretation of
> > > > the
> > > > > Fraction field of the Timestamp field. In my exper= ience, PTP
> > > > format
> > > > > is native for the data plane, while NTP is more us= ed at the
> > > > control
> > > > > plane. Original extension to TWAMP has been descri= bed in RFC
> > > > 8186.
> > > >
> > > > I think you missunderstood. When I talk about clock sou= rce, I am
> > > > actually referring to identifying the particular clock = that the
> > > > node
> > > > use to derive the included timestamp from.
> > > >
> > > > And likely this is a moot point in this document where = the clock
> > > > source
> > > > information belongs in the management layer, e.g. in th= e YANG data
> > > > model.
> > >
> > > GIM2>> Timestamp Information TLV (draft-ietf-ippm-stam= p-option-tlv)
> > > provides information about the clock synchronization protoco= l and the
> > > method by wich the timestamp has been acquired at a Session-=
> > > Reflector. We may extend it to list the name/locatior of the= master
> > > clock.
> >
> > Ok. sounds reasonable.
> >
> > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04. Section 4= .1:
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Beca= use STAMP supports symmetrical test packets,
> > > > STAMP
> > > > > > Session-Sender
> > > > > >=C2=A0 =C2=A0 packet has a minimum size of 44 = octets in unauthenticated
> > > > mode,
> > > > > > see
> > > > > >=C2=A0 =C2=A0 Figure 2, and 112 octets in the = authenticated mode, see
> > > > Figure
> > > > > > 4.
> > > > > >
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The above te= xt implies some potential for UDP payload
> > > > size
> > > > > > variability
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0for the STAM= P packets. However, the actual definition
> > > > > > appear to have
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0fixed sizes.= Can you please clarify if I have missed
> > > > > > something that
> > > > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0enables the = STAMP packet to have variable size?
> > > > >
> > > > > GIM>> I think that the text can be improved = by characterizing the
> > > > > listed sizes as "base". The variable len= gth of a test packet in
> > > > STAMP
> > > > > is supported by using Extra Padding TLV defined in= draft-ietf-
> > > > ippm-
> > > > > stamp-option-tlv. Below is the proposed update: > > > > > OLD TEXT:
> > > > >=C2=A0 =C2=A0 Because STAMP supports symmetrical te= st packets, STAMP
> > > > Session-
> > > > > Sender
> > > > >=C2=A0 =C2=A0 packet has a minimum size of 44 octet= s in unauthenticated
> > > > mode,
> > > > > see
> > > > >=C2=A0 =C2=A0 Figure 2, and 112 octets in the authe= nticated mode, see Figure
> > > > 4.
> > > > > NEW TEXT:
> > > > >=C2=A0 =C2=A0 STAMP supports symmetrical test packe= ts.=C2=A0 The base STAMP
> > > > Session-
> > > > >=C2=A0 =C2=A0 Sender packet has a minimum size of 4= 4 octets in
> > > > unauthenticated
> > > > >=C2=A0 =C2=A0 mode, see Figure 2, and 112 octets in= the authenticated mode,
> > > > see
> > > > >=C2=A0 =C2=A0 Figure 4.=C2=A0 The variable length o= f a test packet in STAMP is
> > > > > supported
> > > > >=C2=A0 =C2=A0 by using Extra Padding TLV defined in=
> > > > >=C2=A0 =C2=A0 [I-D.ietf-ippm-stamp-option-tlv].
> > > > >
> > > > > With the new reference, should I-D.ietf-ippm-stamp= -option-tlv be
> > > > > moved to the Normative References list or may rema= in in the
> > > > > Informative list?
> > > >
> > > > From my perspective, the fact that optional TLV may occ= ur following
> > > > the
> > > > base headers appears quite important. Here comes a ques= tion of
> > > > intention form the WG. Is it intended that one can have= STAMP
> > > > endpoints
> > > > that do not even support receiving packets larger than = the base?
> > > > In other words there will be two main versions already = now, one
> > > > that
> > > > supports some TLV and can at least handle the TLV skip = forward and
> > > > ignore the content and one that will throw a fit over t= he TLVs? If
> > > > that
> > > > is not the intention I think the fact that TLV's ma= y occur should
> > > > be
> > > > moved into this specification and have it as a normativ= e reference.
> > >
> > > GIM2>> Will move the reference to the Normative sectio= n. With TLV
> > > being normative, I'd expect that the intelligent impleme= ntation of
> > > this draft, of the base STAMP specification, will accept any= valid
> > > STAMP packet though not process extensions. But the base STA= MP
> > > Session-Reflector will return the base reflected packet.=C2= =A0
> >
> > I think that is very reasonable approach. Are you close to comple= te the
> > stamp-option-tlv document, or will the missref cause any issue? <= br> > >
> > > > I guess the answer is that you have backwards comaptibi= lity reasons
> > > > for
> > > > not allowing TLVs at all in some sessions, or?
> > >
> > > GIM2>> Yes, that and the principle "keep it simpl= e".
> >
> > Thanks,
> >
> > To me it looks like with some text changes all my issues are addr= essed.
> >
> > Cheers
> >
> > Magnus Westerlund
> >
> >
> > -----------------------------------------------------------------= -----
> > Network Architecture & Protocols, Ericsson Research
> > -----------------------------------------------------------------= -----
> > Ericsson AB=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0| Phone=C2=A0 +46 10 7148287
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--
Cheers

Magnus Westerlund


----------------------------------------------------------------------
Network Architecture & Protocols, Ericsson Research
----------------------------------------------------------------------
Ericsson AB=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| = Phone=C2=A0 +46 10 7148287
Torshamnsgatan 23=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| Mobile +46 73 0= 949079
SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------


--000000000000e3b35a05937623be-- From nobody Sun Sep 29 14:41:30 2019 Return-Path: X-Original-To: ippm@ietfa.amsl.com Delivered-To: ippm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4B963120077 for ; Sun, 29 Sep 2019 14:41:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.1 X-Spam-Level: X-Spam-Status: No, score=0.1 tagged_above=-999 required=5 tests=[BAYES_50=0.8, RCVD_IN_DNSWL_LOW=-0.7, 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 mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Pqit8us58_pK for ; Sun, 29 Sep 2019 14:41:27 -0700 (PDT) Received: from mx0a-00191d01.pphosted.com (mx0a-00191d01.pphosted.com [67.231.149.140]) (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 6FE48120073 for ; Sun, 29 Sep 2019 14:41:27 -0700 (PDT) Received: from pps.filterd (m0053301.ppops.net [127.0.0.1]) by mx0a-00191d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id x8TLZBpL018010 for ; Sun, 29 Sep 2019 17:41:25 -0400 Received: from tlpd255.enaf.dadc.sbc.com (sbcsmtp3.sbc.com [144.160.112.28]) by mx0a-00191d01.pphosted.com with ESMTP id 2vb429rn6g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 29 Sep 2019 17:41:25 -0400 Received: from enaf.dadc.sbc.com (localhost [127.0.0.1]) by tlpd255.enaf.dadc.sbc.com (8.14.5/8.14.5) with ESMTP id x8TLfOYs011631 for ; Sun, 29 Sep 2019 16:41:24 -0500 Received: from zlp30495.vci.att.com (zlp30495.vci.att.com [135.46.181.158]) by tlpd255.enaf.dadc.sbc.com (8.14.5/8.14.5) with ESMTP id x8TLfLp3011578 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Sun, 29 Sep 2019 16:41:21 -0500 Received: from zlp30495.vci.att.com (zlp30495.vci.att.com [127.0.0.1]) by zlp30495.vci.att.com (Service) with ESMTP id 166054005C2B for ; Sun, 29 Sep 2019 21:41:21 +0000 (GMT) Received: from clpi183.sldc.sbc.com (unknown [135.41.1.46]) by zlp30495.vci.att.com (Service) with ESMTP id E87CE4005C2A for ; Sun, 29 Sep 2019 21:41:20 +0000 (GMT) Received: from sldc.sbc.com (localhost [127.0.0.1]) by clpi183.sldc.sbc.com (8.14.5/8.14.5) with ESMTP id x8TLfKQp018730 for ; Sun, 29 Sep 2019 16:41:20 -0500 Received: from mail-blue.research.att.com (mail-blue.research.att.com [135.207.178.11]) by clpi183.sldc.sbc.com (8.14.5/8.14.5) with ESMTP id x8TLfEFX018403 for ; Sun, 29 Sep 2019 16:41:15 -0500 Received: from exchange.research.att.com (njbdcas1.research.att.com [135.197.255.61]) by mail-blue.research.att.com (Postfix) with ESMTP id 8378CF0DEA for ; Sun, 29 Sep 2019 17:41:14 -0400 (EDT) Received: from njmtexg5.research.att.com ([fe80::b09c:ff13:4487:78b6]) by njbdcas1.research.att.com ([fe80::8c6b:4b77:618f:9a01%11]) with mapi id 14.03.0468.000; Sun, 29 Sep 2019 17:41:07 -0400 From: "MORTON, ALFRED C (AL)" To: "ippm@ietf.org" Thread-Topic: September Summary on Max IP-Layer Capacity Metric Thread-Index: AdV3Dk0U0CN8YEE8RCWwGfOaryjfnQ== Date: Sun, 29 Sep 2019 21:41:06 +0000 Message-ID: <4D7F4AD313D3FC43A053B309F97543CFA0AFBAA6@njmtexg5.research.att.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.141.203.172] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-29_13:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909290247 Archived-At: Subject: [ippm] September Summary on Max IP-Layer Capacity Metric X-BeenThere: ippm@ietf.org 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: Sun, 29 Sep 2019 21:41:29 -0000 IPPM List September Summary on Max IP-Layer Capacity Metric (Re: [ippm] How should capacity measurement interact with shaping?) currently draft-morton-ippm-capcity-metric-measurement-00 We've had a very good discussion of many important aspects of IP layer Capacity Metric/Measurements, including: + Recognizing how an alt. flow control for TCP (BBR) uses a similar metric= =20 + Reporting the results under unusual circumstances + Bringing IPPM's documented experience and literature to the problem + Gaining experience from each-other's measurements/research + Suggestion of related work areas It's useful to summarize many pages of discussion from time to time: we can capture (what the summarizer thinks) we learned,=20 and new readers can join the discussion more easily.=20 With those goals in mind, a humble attempt to summarize follows. Feel free to set me straight in a concise way, of course. @@@@ is a flag for take-aways; items to address in the draft. Matt Mathis engaged the "capcity" draft authors shortly=20 after IETF-105, and kindly agreed to foster wider review on the ippm-list. There's a whole lot of *shaping* going on [0]. Matt's M-Lab measurements revealed a clear case of bi-modal maximum rates (94 & 83 Mbps), consistent with a service feature=20 in the context of Shaping, and R=FCdiger shared his experiences=20 with fixed access shaper design. @@@@ A clear take-away is that reporting must account for such a bimodal feature, if/when measured.=20 @@@@ Also, that wide-spread measurements will encounter wide-spread behaviors - testing should continue + expect some evolution. Joachim and R=FCdiger discussed the situation further, confirming how buffers play a big part in the assessment and performance. When answering the reporting question, the measurement time interval (long-term?, many different shapers and on-demand technology may be encountered, as anticipated in RFC 7312) play a key role. Joachim also provided two key points of reasoning for BTC (RFC 3148): categorize the influencing factors and refine the 3148 definition. The discussion covered LTE public networks with on-demand access=20 and shared resources.=20 @@@@ IMO, many of the above challenges fall on the measurement methodology: allow for traffic & time to initiate an on-demand access. @@@@ Also, results depend on the sending stream characteristics; we've known this for a long time, still need to keep it front of mind. @@@@ Max IP-Layer Capacity and RFC 3148 BTC (goodput) are different metrics. Max IP-layer Capacity is like the theoretical goal for goodput. @@@@ This is a big one: when the path we measure is state-full based on many factors, the Parameter "Time of day" when a test starts is not=20 enough info. We need to know the time from the beginning of a=20 measured flow, and how the flow is constructed including how much=20 traffic has already been sent on that flow, because state-change may be based on time or bytes sent or both. Re-read RFC 7312. @@@@ The Singleton and Statistic formulations of IPPM's framework RFC 2330 are still valuable in this context, possibly combined with results criteria ("stable" for X singletons, non-arbitrary threshold needed to define "stable").=20 R=FCdiger proposed a back-to-back stream for BTC characterization. Joachim felt this b2b test might be a pre-requisite to measure a BTC singleton.=20 [acm] it's a tricky test in production networks, see [1] @@@@ Measurements depend on the access network and the use case. Here, the use case is to assess the maximum capacity of the=20 access network, with specific performance criteria used in the=20 measurement. Finally, an exchange between Ignacio and R=FCdiger brings us=20 back to first-principles: What are you trying to measure, and what does it mean? What does it matter to demonstrate that=20 a portion of the network can reach a published value? What capacity is available 100% of the time: you cannot=20 make measurements that saturate the network 100% of the time?=20 R=FCdiger responded that this effort has very specific goals, to demonstrate that the performance promised is present when requested to do so, consistent with the metric proposed. There are *many* other metrics, such as available BW. Ignacio had some measurement proposals for what may be a=20 different network performance metric (IMO). @@@@ Goals made clearer in the next draft, if possible. Well, that's a long summary, and we have identified many work items for the draft. We also have more measurements (and=20 therefore, more useful experiences) coming.=20 Thanks to all who commented so far, very helpful stuff. We look forward to additional discussion and suggestions! [2] regards,=20 Al [0] apologies to Jerry Lee Louis: https://www.youtube.com/watch?v=3D1dC0Ds= eCyYE [1] https://tools.ietf.org/html/draft-ietf-bmwg-b2b-frame-00 [2] It would be good to create threads on specific topics in future, but Keep those cards and letters coming-in, folks! 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Thread-Index: AQHVU4HrkoUGktYwE0yJQr8LfUwZ06b/aQHwgAQxteCAL6Jm4IAAvlkA//++dPCAAIuwgIACMOUAgAB7hwCABojxgIAAjnMAgAZVHfA= Date: Mon, 30 Sep 2019 11:38:45 +0000 Message-ID: <4D7F4AD313D3FC43A053B309F97543CFA0AFBB8E@njmtexg5.research.att.com> References: <4D7F4AD313D3FC43A053B309F97543CFA0ADC777@njmtexg4.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9184@njmtexg5.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF94D0@njmtexg5.research.att.com> <4D7F4AD313D3FC43A053B309F97543CFA0AF9BA5@njmtexg5.research.att.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.141.203.172] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909300124 Archived-At: Subject: Re: [ippm] How should capacity measurement interact with shaping? X-BeenThere: ippm@ietf.org 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: Mon, 30 Sep 2019 11:39:32 -0000 SGkgSWduYWNpbyBhbmQgUsO8ZGlnZXIsDQpwbGVhc2Ugb25lIHJlcGx5IGJlbG93Lg0KDQo+IC0t LS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+IEZyb206IGlwcG0gW21haWx0bzppcHBtLWJvdW5j ZXNAaWV0Zi5vcmddIE9uIEJlaGFsZiBPZg0KPiBSdWVkaWdlci5HZWliQHRlbGVrb20uZGUNCj4g U2VudDogVGh1cnNkYXksIFNlcHRlbWJlciAyNiwgMjAxOSAyOjUxIEFNDQo+IFRvOiBpaGFtZWxp QGNuZXQuZmkudWJhLmFyDQo+IENjOiBpcHBtQGlldGYub3JnDQo+IFN1YmplY3Q6IFJlOiBbaXBw bV0gSG93IHNob3VsZCBjYXBhY2l0eSBtZWFzdXJlbWVudCBpbnRlcmFjdCB3aXRoIHNoYXBpbmc/ DQo+IA0KPiBEZWFyIElnbmFjaW8sDQo+IA0KPiBbSUFIXSBNeSBxdWVzdGlvbiBpczogd2h5IG9u ZSB3YW50cyB0byBtZWFzdXJlIHRoZSAicmVhbCIgYWNjZXNzIGlmIHRoaXMNCj4gb25lIGNvdWxk IG5vdCBiZSBhdmFpbGFibGUgMTAwJSBvZiB0aGUgdGltZSBhdCB0aGF0IHNwZWNpZmljIHNwZWVk 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draft-ietf-ippm-stamp.all@ietf.org, IETF list , IETF IPPM WG Content-Type: multipart/mixed; boundary="000000000000917ded0593ce46c6" Archived-At: Subject: Re: [ippm] Genart last call review of draft-ietf-ippm-stamp-07 X-BeenThere: ippm@ietf.org 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: Tue, 01 Oct 2019 00:17:34 -0000 --000000000000917ded0593ce46c6 Content-Type: multipart/alternative; boundary="000000000000917deb0593ce46c4" --000000000000917deb0593ce46c4 Content-Type: text/plain; charset="UTF-8" Hi Dale, thank you for your review, comments, and suggestions. Please find answers and notes in-line under the GIM>> tag. Attached, please find the diff between -07 and the current working version, as well as, the working version of the draft. Regards, Greg On Tue, Sep 3, 2019 at 6:01 PM Dale Worley via Datatracker wrote: > ---------------------------------------------------------------------- > I am the assigned Gen-ART reviewer for this draft. The General Area > Review Team (Gen-ART) reviews all IETF documents being processed > by the IESG for the IETF Chair. Please treat these comments just > like any other last call comments. > > For more information, please see the FAQ at > > . > > Document: draft-ietf-ippm-stamp-07 > Reviewer: Dale R. Worley > Review Date: 2019-09-03 > IETF LC End Date: 2019-09-03 > IESG Telechat date: 2019-09-19 > > Summary: > > This draft is on the right track but has open issues, described > in the review. > > Minor technical issue: > > 4.4. Interoperability with TWAMP Light > > The consequences of using a TWAMP Session-Sender with a STAMP > Session-Reflector aren't adequately described. I suspect that the WG > understands the technical solution, but the text does not make that > clear. > > If the Server Octets field is present in the TWAMP > Session-Sender packet, STAMP Session-Reflector will not copy the > content starting from the Server Octets field but will transmit the > reflected packet of equal size. > > The final phrase appears to not be true. In both unauthenticated and > authenticated mode, the size of the reflected packet is fixed, and so > in this case, it will not have equal size with the incoming packet. > Also, there is no requirement that a STAMP Session-Reflector even > accept incoming packets that are not of the standard length. > GIM>> Thank you for catching this issue. When the work on STAMP specification started, this draft also included extensions, such as Extra Padding TLV. Over the course of our work, all extensions were moved to the separate draft. Would the following update (including the previous paragraph in the section) address your concern: OLD TEXT: In the latter scenario, if a TWAMP Light Session-Sender does not support the use of UDP port 862, the test management system MUST set STAMP Session-Reflector to use UDP port number as defined in Section 4. If the TWAMP Light Session-Sender includes Packet Padding field in its transmitted packet, the STAMP Session-Reflector will return the reflected packet of the symmetrical size if the size of the received test packet is larger than the size of the STAMP base packet. The Session-Reflector MUST be set to use the default format for its timestamps, NTP. STAMP does not support the Reflect Octets capability defined in [RFC6038]. If the Server Octets field is present in the TWAMP Session-Sender packet, STAMP Session-Reflector will not copy the content starting from the Server Octets field but will transmit the reflected packet of equal size. NEW TEXT: In the latter scenario, if a TWAMP Light Session-Sender does not support the use of UDP port 862, the test management system MUST set STAMP Session-Reflector to use UDP port number as defined in Section 4. The Session-Reflector MUST be set to use the default format for its timestamps, NTP. A STAMP Session-Reflector that supports this specification would transmit the base packet (Figure 5) regardless of the size of the Padding field in the packet received from TWAMP Session-Sender. Also, STAMP does not support the Reflect Octets capability defined in [RFC6038]. If the Server Octets field is present in the TWAMP Session-Sender packet, STAMP Session-Reflector will not copy the content starting from the Server Octets field and will transmit the reflected packet, as displayed in Figure 5. > It seems that there is an unwritten requirement that a STAMP > Session-Reflector accept longer packets than are expected for its > configured operation mode and simply ignore the trailing excess > octets. > > There are also some interactions with how the HMAC is verified for > over-length incoming authenticated packets -- how does a STAMP > Session-Reflector authenticate an incoming packet that is longer than > the STAMP format? > GIM>> Authentication in TWAMP and STAMP use different algorithms (HMAC-SHA-256 in STAMP vs. HMAC-SHA-1 in TWAMP as inherited from OWAMP [RFC4656]), we don't have the requirement to provide interoperability in Authenticated mode. Will update the first paragraph of the interoperability section to explicitly state the scope: OLD TEXT: One of the essential requirements to STAMP is the ability to interwork with a TWAMP Light device. NEW TEXT: One of the essential requirements to STAMP is the ability to interwork with a TWAMP Light device. Because STAMP and TWAMP use different algorithms in Authenticated mode (HMAC-SHA-256 vs. HMAC- SHA-1), interoperability is only considered for Unauthenticated mode. > > Editorial issues: > > 1. Introduction > > and inherit separation of control (vendor-specific configuration or > orchestration) and test functions. > > Is "inherit" intended to be "inherent"? > GIM>> Thank you. That was the intention. Done. > > One of such is Performance > Measurement from IP Edge to Customer Equipment using TWAMP Light from > Broadband Forum [BBF.TR-390] used as the reference TWAMP Light that, > according to [RFC8545], includes sub-set of TWAMP-Test functions in > combination with other applications that provide, for example, > control and security. > > This sentence is awkward because of the length of the title in the > middle of the sentence. Perhaps > > One of such is [BBF.TR-390] (Performance Measurement from IP Edge > to Customer Equipment using TWAMP Light from the Broadband Forum), > a the reference TWAMP Light, that includes a sub-set of TWAMP-Test > functions along with control and security functions. > GIM>> Thank you for the proposed text. While addressing other comments the text has been transformed to the following: CURRENT TEXT: Recent work on IP Edge to Customer Equipment using TWAMP Light from Broadband Forum [BBF.TR-390] demonstrated that interoperability among implementations of TWAMP Light is challenged because the composition and operation of TWAMP Light were not sufficiently specified in [RFC5357]. According to [RFC8545], TWAMP Light includes sub-set of TWAMP-Test functions to provide comprehensive solution requires support by other applications that provide, for example, control and security. Hope the current version is clearer and more readable. > > -- > > This document defines an active performance measurement test protocol > > This sentence doesn't explicitly say that STAMP is connected to TWAMP, > despite that the preceding sentence does explicitly say that > BBF.TR-390 is connected to TWAMP. Perhaps, "This document defines > another such mechanism ..." Perhaps also precede with a paragraph > break for clarity. > GIM>> Introduction section now has three paragraphs and the last refers to common extensions. Do you feel that the current version made the relationship between TWAMP-Test and STAMP clearer: CURRENT TEXT: This document defines an active performance measurement test protocol, Simple Two-way Active Measurement Protocol (STAMP), that enables measurement of both one-way and round-trip performance metrics like delay, delay variation, and packet loss. Some TWAMP extensions, e.g., [RFC7750] are supported by the extensions to STAMP base specification in [I-D.ietf-ippm-stamp-option-tlv]. > > 2.1. Terminology > > AES Advanced Encryption Standard > CBC Cipher Block Chaining > ECB Electronic Cookbook > KEK Key-encryption Key > > These four terms are not used in the document. > GIM>> Thank you, removed. > > 3. Softwarization of Performance Measurement > > The configuration and management of the STAMP Session- > Sender, Session-Reflector, and management of the STAMP sessions can > be achieved through various means. > > You should probably revise to add "... sessions are outside the scope > of this document and can be ...". > GIM>> Thank you for the suggested text. Agreed and added. > > Command Line Interface, OSS/BSS > (operations support system/business support system as a combination > of two systems used to support a range of telecommunication services) > using SNMP or controllers in Software-Defined Networking using > Netconf/YANG are but a few examples. > > This sentence is long and awkward in a number of ways. One version > that I think is clearer is: > > A few examples are: Command Line Interface, telecommunication > services' OSS/BSS systems, SNMP, and Netconf/YANG-based SDN > controllers. > GIM>> Many thanks for the proposal. The text is denser and informative. > > 4. Theory of Operation > > About half of the text in section 4 is about port assignments, but > that isn't really part of the "Theory of Operation". I think the > exposition would be easier to read if the text about port assignments > was extracted and put into a separate subsection (probably placed > between 4 and 4.1). > GIM>> I've re-arranged Section 4. Please let me know if the flow of information is clear and makes sense. > > 4.1.1. Session-Sender Packet Format in Unauthenticated Mode > > o Sequence Number is four octets long field. For each new session > its value starts at zero and is incremented with each transmitted > packet. > > There is no definition of what a STAMP session is in this document. > The idea is more or less obvious, but it would be useful to call out > its primary properties in section 4 "Theory of Operation". It seems > like the primary properties are that a session is between one > Session-Sender and one Session-Reflector and a session contains a > potentially unlimited number of packets sent between the two. > GIM>> Magnus had similar comment and in course of our discussion we've agreed on the following definition of a STAMP session, now part of Section 3: In this document, a measurement session also referred to as STAMP session, is the bi-directional packet flow between one specific Session-Sender and one particular Session-Reflector for a time duration. > > o Timestamp is eight octets long field. STAMP node MUST support > Network Time Protocol (NTP) version 4 64-bit timestamp format > [RFC5905], the format used in [RFC5357]. STAMP node MAY support > IEEE 1588v2 Precision Time Protocol truncated 64-bit timestamp > format [IEEE.1588.2008], the format used in [RFC8186]. > > The specification of how the time format for a particular packet is > chosen is weak. I think you want to add to the above paragraph that > the choice of format is determined either by configuration or the Z > bit in the Error Estimate field. > GIM>> In regard to the format of a timestamp, STAMP specification follows the idea of RFC 8186 where extension to negotiate timestamp format for TWAMP-Control and the new interpretation of Z flag were defined. For STAMP, as defined for TWAMP, the value of the Z flag in the Error Estimate field is only to reflect the format used by the node. > > 4.1.2. Session-Sender Packet Format in Authenticated Mode > > Also, MBZ fields are used to align the packet on 16 octets > boundary. > > You can't align the packet itself using a field within the packet. > You want to say "are used to align the fields within the packet on 16 > octets boundaries." Or perhaps "to make the packet length a multiple > of 16 octets." Similarly in 4.2.1 and 4.2.2. > GIM>> Thank you for the suggested text. I've used the second option. > > 4.2. Session-Reflector Behavior and Packet Format > > Two modes of STAMP Session-Reflector characterize the expected > behavior and, consequently, performance metrics that can be measured: > > o Stateless - STAMP Session-Reflector does not maintain test state > and will reflect the received sequence number without > modification. As a result, only round-trip packet loss can be > calculated while the reflector is operating in stateless mode. > > o Stateful - STAMP Session-Reflector maintains test state thus > enabling the ability to determine forward loss, gaps recognized in > the received sequence number. As a result, both near-end > (forward) and far-end (backward) packet loss can be computed. > That implies that the STAMP Session-Reflector MUST keep a state > for each accepted STAMP-test session, uniquely identifying STAMP- > test packets to one such session instance, and enabling adding a > sequence number in the test reply that is individually incremented > on a per-session basis. > > This seems important enough -- the mode determines what data STAMP > can measure -- to be promoted to part of section 4, "Theory of > Operation". > GIM>> I agree. Moved the text to Section 4 and re-named this section to Session-Reflector Packet Format > > 4.3. Integrity and Confidentiality Protection in STAMP > > To provide integrity protection, each STAMP message is being > authenticated by adding Hashed Message Authentication Code (HMAC). > > Of course, this is only regarding authenticated mode. So you want to > phrase this "Authenticated mode provides integrity protection to each > STAMP message by adding ...". > GIM>> Again, thank you for the suggestion. > > 4.4. Interoperability with TWAMP Light > > For example, a TWAMP Light > Session-Reflector may not support the use of UDP port 862 as defined > in [RFC8545]. Thus STAMP Session-Sender MAY use port numbers as > defined in Section 4. > > The connection between these two sentences is unclear. I think it > means: > > For example, a TWAMP Light > Session-Reflector may not support the use of UDP port 862 as specified > in [RFC8545]. Thus Section 4 permits a STAMP Session-Sender to use > alternative ports. > GIM>> Great, thank you! > > -- > > The > Session-Sender SHOULD use the default format for its timestamps - > NTP. And it MAY use PTPv2 timestamp format > > The first sentence could be made more specific. But the second > sentence seems to be redundant -- SHOULD is never mandatory, so you > don't have to add a MAY. So perhaps, > > When interoperating with a TWAMP Light Session-Reflector, the > Session-Sender SHOULD use the default format for its timestamps - > NTP. > GIM>> We've reviewed these requirements and had agreed that they are not needed. The STAMP Session-Sender is required to be able to interpret both formats, NTP and PTP2, and the selection is local decision that has no impact on the ability to interwork with TWAMP Light Session-Reflector. Hence, these two sentences were removed. > > -- > > In the latter scenario, if a TWAMP Light Session-Sender does not > support the use of UDP port 862, the test management system MUST set > STAMP Session-Reflector to use UDP port number as defined in > Section 4. > > The phrase "to use UDP port number as defined in Section 4" isn't > clear, since second 4 doesn't define what UDP port number should be > used in this situation. I think the meaning is "the test management > system MUST set STAMP Session-Reflector to use an acceptable UDP port > number, as permitted by Section 4". > GIM>> Thank you, accepted the text you've proposed. > > 6. Security Considerations > > STAMP test packets can be transmitted with the destination UDP port > number from the User Ports range, as defined in Section 4, that is > already or will be assigned by IANA. > > This sentence seems to be more part of the port-number discussion (see > comments on section 4) than security considerations -- unless the > usage of port numbers is a topic in security. > > Additionally, it appears that section 4 requires that a STAMP service > can be configured to sent packets to any port within the User Ports > range, regardless of whether IANA assigns a User Port specifically to > STAMP. With this consideration, the phrase "that is already or will > be assigned by IANA" seems to be either redundant or too narrow. > GIM>> This text has been moved to the Operational Considerations section. In the process of re-arraging we've removed the characterization "already or will be assigned by IANA". Please let me know if the current version of the text is acceptable. --000000000000917deb0593ce46c4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Dale,
thank you for your review, c= omments, and suggestions. Please find answers and notes in-line under the G= IM>> tag.
Attached, please find the diff between -07 and th= e current working version, as well as, the working version of the draft.

Regards,
Greg

On Tue, Sep 3, 2019 at = 6:01 PM Dale Worley via Datatracker <noreply@ietf.org> wrote:
=C2=A0 ---------------------------------= -------------------------------------
I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq&g= t;.

Document:=C2=A0 draft-ietf-ippm-stamp-07
Reviewer:=C2=A0 Dale R. Worley
Review Date:=C2=A0 2019-09-03
IETF LC End Date:=C2=A0 2019-09-03
IESG Telechat date:=C2=A0 2019-09-19

Summary:

=C2=A0 =C2=A0 =C2=A0 =C2=A0This draft is on the right track but has open is= sues, described
=C2=A0 =C2=A0 =C2=A0 =C2=A0in the review.

Minor technical issue:

4.4.=C2=A0 Interoperability with TWAMP Light

The consequences of using a TWAMP Session-Sender with a STAMP
Session-Reflector aren't adequately described.=C2=A0 I suspect that the= WG
understands the technical solution, but the text does not make that
clear.

=C2=A0 =C2=A0If the Server Octets field is present in the TWAMP
=C2=A0 =C2=A0Session-Sender packet, STAMP Session-Reflector will not copy t= he
=C2=A0 =C2=A0content starting from the Server Octets field but will transmi= t the
=C2=A0 =C2=A0reflected packet of equal size.

The final phrase appears to not be true.=C2=A0 In both unauthenticated and<= br> authenticated mode, the size of the reflected packet is fixed, and so
in this case, it will not have equal size with the incoming packet.
Also, there is no requirement that a STAMP Session-Reflector even
accept incoming packets that are not of the standard length.
GIM>> Thank you for catching this issue. When the work on STAM= P specification started, this draft also included extensions, such as Extra= Padding TLV. Over the course of our work, all extensions were moved to the= separate draft. Would the following update (including the previous paragra= ph in the section) address your concern:
OLD TEXT:
=C2= =A0 =C2=A0In the latter scenario, if a TWAMP Light Session-Sender does not<= br>=C2=A0 =C2=A0support the use of UDP port 862, the test management system= MUST set
=C2=A0 =C2=A0STAMP Session-Reflector to use UDP port number as= defined in
=C2=A0 =C2=A0Section 4.=C2=A0 If the TWAMP Light Session-Sen= der includes Packet Padding
=C2=A0 =C2=A0field in its transmitted packet= , the STAMP Session-Reflector will
=C2=A0 =C2=A0return the reflected pac= ket of the symmetrical size if the size of
=C2=A0 =C2=A0the received tes= t packet is larger than the size of the STAMP base
=C2=A0 =C2=A0packet.= =C2=A0 The Session-Reflector MUST be set to use the default format
=C2= =A0 =C2=A0for its timestamps, NTP.

=C2=A0 =C2=A0STAMP does not suppo= rt the Reflect Octets capability defined in
=C2=A0 =C2=A0[RFC6038].=C2= =A0 If the Server Octets field is present in the TWAMP
=C2=A0 =C2=A0Sess= ion-Sender packet, STAMP Session-Reflector will not copy the
=C2=A0 =C2= =A0content starting from the Server Octets field but will transmit the
= =C2=A0 =C2=A0reflected packet of equal size.
NEW TEXT:
= =C2=A0 =C2=A0In the latter scenario, if a TWAMP Light Session-Sender does n= ot
=C2=A0 =C2=A0support the use of UDP port 862, the test management sys= tem MUST set
=C2=A0 =C2=A0STAMP Session-Reflector to use UDP port number= as defined in
=C2=A0 =C2=A0Section 4.=C2=A0 The Session-Reflector MUST = be set to use the default
=C2=A0 =C2=A0format for its timestamps, NTP.
=C2=A0 =C2=A0A STAMP Session-Reflector that supports this specificati= on would
=C2=A0 =C2=A0transmit the base packet (Figure 5) regardless of = the size of the
=C2=A0 =C2=A0Padding field in the packet received from T= WAMP Session-Sender.
=C2=A0 =C2=A0Also, STAMP does not support the Refle= ct Octets capability defined in
=C2=A0 =C2=A0[RFC6038].=C2=A0 If the Ser= ver Octets field is present in the TWAMP
=C2=A0 =C2=A0Session-Sender pac= ket, STAMP Session-Reflector will not copy the
=C2=A0 =C2=A0content star= ting from the Server Octets field and will transmit the
=C2=A0 =C2=A0ref= lected packet, as displayed in Figure 5.

It seems that there is an unwritten requirement that a STAMP
Session-Reflector accept longer packets than are expected for its
configured operation mode and simply ignore the trailing excess
octets.

There are also some interactions with how the HMAC is verified for
over-length incoming authenticated packets -- how does a STAMP
Session-Reflector authenticate an incoming packet that is longer than
the STAMP format?
GIM>> Authentication in TWAMP = and STAMP use different algorithms (HMAC-SHA-256 in STAMP vs. HMAC-SHA-1 in= TWAMP as inherited from OWAMP [RFC4656]), we don't have the requiremen= t to provide interoperability in Authenticated mode. Will update the first = paragraph of the interoperability section to explicitly state the scope:
OLD TEXT:
=C2=A0 =C2=A0One of the essential requirements = to STAMP is the ability to
=C2=A0 =C2=A0interwork with a TWAMP Light dev= ice.
NEW TEXT:
=C2=A0 =C2=A0One of the essential re= quirements to STAMP is the ability to
=C2=A0 =C2=A0interwork with a TWAM= P Light device.=C2=A0 Because STAMP and TWAMP use
=C2=A0 =C2=A0different= algorithms in Authenticated mode (HMAC-SHA-256 vs. HMAC-
=C2=A0 =C2=A0S= HA-1), interoperability is only considered for Unauthenticated mode.

Editorial issues:

1.=C2=A0 Introduction

=C2=A0 =C2=A0and inherit separation of control (vendor-specific configurati= on or
=C2=A0 =C2=A0orchestration) and test functions.

Is "inherit" intended to be "inherent"?
GIM>> Thank you. That was the intention. Done.=C2=A0

=C2=A0 =C2=A0One of such is Performance
=C2=A0 =C2=A0Measurement from IP Edge to Customer Equipment using TWAMP Lig= ht from
=C2=A0 =C2=A0Broadband Forum [BBF.TR-390] used as the reference TWAMP Light= that,
=C2=A0 =C2=A0according to [RFC8545], includes sub-set of TWAMP-Test functio= ns in
=C2=A0 =C2=A0combination with other applications that provide, for example,=
=C2=A0 =C2=A0control and security.

This sentence is awkward because of the length of the title in the
middle of the sentence.=C2=A0 Perhaps

=C2=A0 =C2=A0One of such is [BBF.TR-390] (Performance Measurement from IP E= dge
=C2=A0 =C2=A0to Customer Equipment using TWAMP Light from the Broadband For= um),
=C2=A0 =C2=A0a the reference TWAMP Light, that includes a sub-set of TWAMP-= Test
=C2=A0 =C2=A0functions along with control and security functions.
GIM>> Thank you for the proposed text. While addressing o= ther comments the text has been transformed to the following:
CUR= RENT TEXT:
=C2=A0 =C2=A0Recent work on IP Edge to Customer Equipment u= sing TWAMP Light from
=C2=A0 =C2=A0Broadband Forum [BBF.TR-390] demonstr= ated that interoperability among
=C2=A0 =C2=A0implementations of TWAMP L= ight is challenged because the composition
=C2=A0 =C2=A0and operation of= TWAMP Light were not sufficiently specified in
=C2=A0 =C2=A0[RFC5357].= =C2=A0 According to [RFC8545], TWAMP Light includes sub-set of
=C2=A0 = =C2=A0TWAMP-Test functions to provide comprehensive solution requires
= =C2=A0 =C2=A0support by other applications that provide, for example, contr= ol and
=C2=A0 =C2=A0security.=C2=A0
Hope the current vers= ion is clearer and more readable.

--

=C2=A0 =C2=A0This document defines an active performance measurement test p= rotocol

This sentence doesn't explicitly say that STAMP is connected to TWAMP,<= br> despite that the preceding sentence does explicitly say that
BBF.TR-390 is connected to TWAMP.=C2=A0 Perhaps, "This document define= s
another such mechanism ..."=C2=A0 Perhaps also precede with a paragrap= h
break for clarity.
GIM>> Introduction section no= w has three paragraphs and the last refers to common extensions. Do you fee= l that the current version made the relationship between TWAMP-Test and STA= MP clearer:
CURRENT TEXT:
=C2=A0 =C2=A0This document de= fines an active performance measurement test
=C2=A0 =C2=A0protocol, Simp= le Two-way Active Measurement Protocol (STAMP), that
=C2=A0 =C2=A0enable= s measurement of both one-way and round-trip performance
=C2=A0 =C2=A0me= trics like delay, delay variation, and packet loss.=C2=A0 Some TWAMP
=C2= =A0 =C2=A0extensions, e.g., [RFC7750] are supported by the extensions to ST= AMP
=C2=A0 =C2=A0base specification in [I-D.ietf-ippm-stamp-option-tlv].=

2.1.=C2=A0 Terminology

=C2=A0 =C2=A0AES Advanced Encryption Standard
=C2=A0 =C2=A0CBC Cipher Block Chaining
=C2=A0 =C2=A0ECB Electronic Cookbook
=C2=A0 =C2=A0KEK Key-encryption Key

These four terms are not used in the document.
GIM>= > Thank you, removed.=C2=A0

3.=C2=A0 Softwarization of Performance Measurement

=C2=A0 =C2=A0The configuration and management of the STAMP Session-
=C2=A0 =C2=A0Sender, Session-Reflector, and management of the STAMP session= s can
=C2=A0 =C2=A0be achieved through various means.

You should probably revise to add "... sessions are outside the scope<= br> of this document and can be ...".
GIM>> Tha= nk you for the suggested text. Agreed and added.=C2=A0

=C2=A0 =C2=A0Command Line Interface, OSS/BSS
=C2=A0 =C2=A0(operations support system/business support system as a combin= ation
=C2=A0 =C2=A0of two systems used to support a range of telecommunication se= rvices)
=C2=A0 =C2=A0using SNMP or controllers in Software-Defined Networking using=
=C2=A0 =C2=A0Netconf/YANG are but a few examples.

This sentence is long and awkward in a number of ways.=C2=A0 One version that I think is clearer is:

=C2=A0 =C2=A0 A few examples are:=C2=A0 Command Line Interface, telecommuni= cation
=C2=A0 =C2=A0 services' OSS/BSS systems, SNMP, and Netconf/YANG-based S= DN
=C2=A0 =C2=A0 controllers.
GIM>> Many thanks for= the proposal. The text is denser and informative.
=C2=A0

4.=C2=A0 Theory of Operation

About half of the text in section 4 is about port assignments, but
that isn't really part of the "Theory of Operation".=C2=A0 I = think the
exposition would be easier to read if the text about port assignments
was extracted and put into a separate subsection (probably placed
between 4 and 4.1).
GIM>> I've re-arranged S= ection 4. Please let me know if the flow of information is clear and makes = sense.

4.1.1.=C2=A0 Session-Sender Packet Format in Unauthenticated Mode

=C2=A0 =C2=A0o=C2=A0 Sequence Number is four octets long field.=C2=A0 For e= ach new session
=C2=A0 =C2=A0 =C2=A0 its value starts at zero and is incremented with each = transmitted
=C2=A0 =C2=A0 =C2=A0 packet.

There is no definition of what a STAMP session is in this document.
The idea is more or less obvious, but it would be useful to call out
its primary properties in section 4 "Theory of Operation".=C2=A0 = It seems
like the primary properties are that a session is between one
Session-Sender and one Session-Reflector and a session contains a
potentially unlimited number of packets sent between the two.
GIM>> Magnus had similar comment and in course of our discuss= ion we've agreed on the following definition of a STAMP session, now pa= rt of Section 3:
=C2=A0 =C2=A0In this document, a measurement ses= sion also referred to as
=C2=A0 =C2=A0STAMP session, is the bi-directi= onal packet flow between one specific
=C2=A0 =C2=A0Session-Sender and on= e particular Session-Reflector for a time
=C2=A0 =C2=A0duration.=C2= =A0

=C2=A0 =C2=A0o=C2=A0 Timestamp is eight octets long field.=C2=A0 STAMP node= MUST support
=C2=A0 =C2=A0 =C2=A0 Network Time Protocol (NTP) version 4 64-bit timestamp= format
=C2=A0 =C2=A0 =C2=A0 [RFC5905], the format used in [RFC5357].=C2=A0 STAMP n= ode MAY support
=C2=A0 =C2=A0 =C2=A0 IEEE 1588v2 Precision Time Protocol truncated 64-bit t= imestamp
=C2=A0 =C2=A0 =C2=A0 format [IEEE.1588.2008], the format used in [RFC8186].=

The specification of how the time format for a particular packet is
chosen is weak.=C2=A0 I think you want to add to the above paragraph that the choice of format is determined either by configuration or the Z
bit in the Error Estimate field.
GIM>> In regard= to the format of a timestamp, STAMP specification follows the idea of RFC = 8186 where extension to negotiate timestamp format for TWAMP-Control and th= e new interpretation of Z flag were defined. For STAMP, as defined for TWAM= P, the value of the Z flag in the Error Estimate field is only to reflect t= he format used by the node.=C2=A0

4.1.2.=C2=A0 Session-Sender Packet Format in Authenticated Mode

=C2=A0 =C2=A0Also, MBZ fields are used to align the packet on 16 octets
=C2=A0 =C2=A0boundary.

You can't align the packet itself using a field within the packet.
You want to say "are used to align the fields within the packet on 16<= br> octets boundaries."=C2=A0 Or perhaps "to make the packet length a= multiple
of 16 octets."=C2=A0 Similarly in 4.2.1 and 4.2.2.
GIM>> Thank you for the suggested text. I've used the second op= tion.=C2=A0

4.2.=C2=A0 Session-Reflector Behavior and Packet Format

=C2=A0 =C2=A0Two modes of STAMP Session-Reflector characterize the expected=
=C2=A0 =C2=A0behavior and, consequently, performance metrics that can be me= asured:

=C2=A0 =C2=A0o=C2=A0 Stateless - STAMP Session-Reflector does not maintain = test state
=C2=A0 =C2=A0 =C2=A0 and will reflect the received sequence number without<= br> =C2=A0 =C2=A0 =C2=A0 modification.=C2=A0 As a result, only round-trip packe= t loss can be
=C2=A0 =C2=A0 =C2=A0 calculated while the reflector is operating in statele= ss mode.

=C2=A0 =C2=A0o=C2=A0 Stateful - STAMP Session-Reflector maintains test stat= e thus
=C2=A0 =C2=A0 =C2=A0 enabling the ability to determine forward loss, gaps r= ecognized in
=C2=A0 =C2=A0 =C2=A0 the received sequence number.=C2=A0 As a result, both = near-end
=C2=A0 =C2=A0 =C2=A0 (forward) and far-end (backward) packet loss can be co= mputed.
=C2=A0 =C2=A0 =C2=A0 That implies that the STAMP Session-Reflector MUST kee= p a state
=C2=A0 =C2=A0 =C2=A0 for each accepted STAMP-test session, uniquely identif= ying STAMP-
=C2=A0 =C2=A0 =C2=A0 test packets to one such session instance, and enablin= g adding a
=C2=A0 =C2=A0 =C2=A0 sequence number in the test reply that is individually= incremented
=C2=A0 =C2=A0 =C2=A0 on a per-session basis.

This seems important enough -- the mode determines what data STAMP
can measure -- to be promoted to part of section 4, "Theory of
Operation".
GIM>> I agree. Moved the text t= o Section 4 and re-named this section to=C2=A0 Session-Reflector Packet Format

4.3.=C2=A0 Integrity and Confidentiality Protection in STAMP

=C2=A0 =C2=A0To provide integrity protection, each STAMP message is being =C2=A0 =C2=A0authenticated by adding Hashed Message Authentication Code (HM= AC).

Of course, this is only regarding authenticated mode.=C2=A0 So you want to<= br> phrase this "Authenticated mode provides integrity protection to each<= br> STAMP message by adding ...".
GIM>> Again, = thank you for the suggestion.=C2=A0

4.4.=C2=A0 Interoperability with TWAMP Light

=C2=A0 =C2=A0For example, a TWAMP Light
=C2=A0 =C2=A0Session-Reflector may not support the use of UDP port 862 as d= efined
=C2=A0 =C2=A0in [RFC8545].=C2=A0 Thus STAMP Session-Sender MAY use port num= bers as
=C2=A0 =C2=A0defined in Section 4.

The connection between these two sentences is unclear.=C2=A0 I think it
means:

=C2=A0 =C2=A0For example, a TWAMP Light
=C2=A0 =C2=A0Session-Reflector may not support the use of UDP port 862 as s= pecified
=C2=A0 =C2=A0in [RFC8545].=C2=A0 Thus Section 4 permits a STAMP Session-Sen= der to use
=C2=A0 =C2=A0alternative ports.
GIM>> Great, tha= nk you!=C2=A0

--

=C2=A0 =C2=A0The
=C2=A0 =C2=A0Session-Sender SHOULD use the default format for its timestamp= s -
=C2=A0 =C2=A0NTP.=C2=A0 And it MAY use PTPv2 timestamp format

The first sentence could be made more specific.=C2=A0 But the second
sentence seems to be redundant -- SHOULD is never mandatory, so you
don't have to add a MAY.=C2=A0 So perhaps,

=C2=A0 =C2=A0When interoperating with a TWAMP Light Session-Reflector, the<= br> =C2=A0 =C2=A0Session-Sender SHOULD use the default format for its timestamp= s -
=C2=A0 =C2=A0NTP.
GIM>> We've reviewed these= requirements and had agreed that they are not needed. The STAMP Session-Se= nder is required to be able to interpret both formats, NTP and PTP2, and th= e selection is local decision that has no impact on the ability to interwor= k with TWAMP Light Session-Reflector. Hence, these two sentences were remov= ed.=C2=A0

--

=C2=A0 =C2=A0In the latter scenario, if a TWAMP Light Session-Sender does n= ot
=C2=A0 =C2=A0support the use of UDP port 862, the test management system MU= ST set
=C2=A0 =C2=A0STAMP Session-Reflector to use UDP port number as defined in =C2=A0 =C2=A0Section 4.

The phrase "to use UDP port number as defined in Section 4" isn&#= 39;t
clear, since second 4 doesn't define what UDP port number should be
used in this situation.=C2=A0 I think the meaning is "the test managem= ent
system MUST set STAMP Session-Reflector to use an acceptable UDP port
number, as permitted by Section 4".
GIM>> T= hank you, accepted the text you've proposed.

6.=C2=A0 Security Considerations

=C2=A0 =C2=A0STAMP test packets can be transmitted with the destination UDP= port
=C2=A0 =C2=A0number from the User Ports range, as defined in Section 4, tha= t is
=C2=A0 =C2=A0already or will be assigned by IANA.

This sentence seems to be more part of the port-number discussion (see
comments on section 4) than security considerations -- unless the
usage of port numbers is a topic in security.

Additionally, it appears that section 4 requires that a STAMP service
can be configured to sent packets to any port within the User Ports
range, regardless of whether IANA assigns a User Port specifically to
STAMP.=C2=A0 With this consideration, the phrase "that is already or w= ill
be assigned by IANA" seems to be either redundant or too narrow.
GIM>> This text has been moved to the Operational Con= siderations section. In the process of re-arraging we've removed the ch= aracterization "already or will be assigned by IANA". Please let = me know if the current version of the text is acceptable.
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