From nobody Thu Jun 20 00:06:42 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 CA110120086; Thu, 20 Jun 2019 00:06:40 -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 ERxriIcs7Ajl; Thu, 20 Jun 2019 00:06:39 -0700 (PDT) Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) (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 A206B1205E5; Thu, 20 Jun 2019 00:06:38 -0700 (PDT) Received: by mail-lf1-x12f.google.com with SMTP id r15so1580410lfm.11; Thu, 20 Jun 2019 00:06:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=8t3ReIHgk8i6bE4sw+gzVW8lz4MyEU+TOR4Vwvu+7W8=; b=EelLK9UFrA3MIRP4bqhDaIF+Xh6CcbQI9pE8DZuIHc1nhZF+oympmvfIZB72Lpg+fp sgBOodWrfYJJZZ+LFDtt6WYYQ6gLQgpn1UDfRSxqNyXhLhxx05jWkL18XKAyNh4eWCi1 wQFM5AzNlugR4TPAzrL5c95qAp15VAj3p21WrvIKtO8sLkhqOw1wO4dnb3g3NcQ1sfUY sS1bX0MgGe8Us1mgzwGGuLnWaSxsgsHw9S3xHtGr7JHEHfLcdt6fUwFkIhq7g7suE2TO qIx27dVBUKaLgtQftgse/z3Lld/SvJ+mvyatlHESpYt0soJoROj2C88e6OFSNqbBT2lP QYsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=8t3ReIHgk8i6bE4sw+gzVW8lz4MyEU+TOR4Vwvu+7W8=; b=dq8RZj3L8OcnQLmQJ7OQGpG9HP8WPIn5F3TUdT6aXKy7cw0ZdwcfxcegauT1rS6Fym ekyYGsxmc/aGEhe+8J4kTPaO4MVDYfIefjtjB+9MUTcNQ+H2lmoW0JC+rSLW3DiLDLAn Y/lP0D1QmryPMysWqBnBjdqnorXoVI9Bc6Z0t6EIRKiho4b9F2MBWBcdo1/uhase6Yww l8etTrDlciQSZedaLqkLZHEudMs3KL0nCWOi7dLlH7r+kSP05hN4+eSV69p2rl/5iKym 10Rkk3jVPWpu2iZaDOXd6TMMmFlvrCJHcymlcxw3vkMRrrXy+Oin294x1qAXSKgMvO5l T46Q== X-Gm-Message-State: APjAAAXphR99TPueZsf+EPID05oQdpPF3ZlD02JDtMsX6UtSuZxUsuUL cRYVAa7rReBqWJkOapQZ5tnwZ75Hc1WgmGKE+o2LQNxV4OI= X-Google-Smtp-Source: APXvYqxjqRQbBg6X4w/zXLQQFC9kn8dGMwtMVl8+Bw5B2kkBl47K4xjNxPBsaL9rbbDeh63Pqq4MzJWy/k/cV+V+fMg= X-Received: by 2002:a05:6512:24a:: with SMTP id b10mr62060029lfo.37.1561014396290; Thu, 20 Jun 2019 00:06:36 -0700 (PDT) MIME-Version: 1.0 From: Greg Mirsky Date: Thu, 20 Jun 2019 16:06:24 +0900 Message-ID: To: IPPM Chairs , IETF IPPM WG Cc: draft-mirsky-ippm-stamp-option-tlv@ietf.org Content-Type: multipart/alternative; boundary="000000000000948a9f058bbbfc55" Archived-At: Subject: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 20 Jun 2019 07:06:41 -0000 --000000000000948a9f058bbbfc55 Content-Type: text/plain; charset="UTF-8" Dear Chairs, et al., authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable and detailed enough to ask for your consideration to start the WG Adoption Poll. Regards, Greg --000000000000948a9f058bbbfc55 Content-Type: text/html; charset="UTF-8"
Dear Chairs, et al.,
authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable and detailed enough to ask for your consideration to start the WG Adoption Poll.

Regards,
Greg
--000000000000948a9f058bbbfc55-- From nobody Thu Jun 20 09:39:08 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 65B9E1200F3; Thu, 20 Jun 2019 09:39:06 -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 6JPYfBktHUCD; Thu, 20 Jun 2019 09:39:04 -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 421251200EA; Thu, 20 Jun 2019 09:39:04 -0700 (PDT) Received: by mail-lj1-x235.google.com with SMTP id p17so3351837ljg.1; Thu, 20 Jun 2019 09:39:04 -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=KDUVnPivc0CdTwxyOwR+54ZjfrG7iEdDrD+lvhq9b+Y=; b=XFse6iG+sDVKuSZqmaD0YhoMGQfim/T5jxq7FMgnCeoODeEHoyqquAaWnzWhsQs9B7 bLJ/LB2HorQFf6yU+OBbAXGAyi19y979Gf/Zc6ogZ6MK1hu7R7bAzTdZR4Bf4jccY+PP PMlz5jbwSj12Kx4+Cq3HDEha/v/Uou87/2XmRl0hOaCdJ4ERM5Qkhz6Lb47j5g9Yphyd LsQLJBOcegusL+XIyBI2/bU4p0dpZ7fPVDZlpUqEEzqlKs3L0N2EedbHH2WGRUUTECNJ WsJsTIwgR9sMNZRnX10/kJzerwMs7Rfr+ObQaDk+BnaJunq0lDvXwyMtz+4UiXYKQGGY oWCg== 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=KDUVnPivc0CdTwxyOwR+54ZjfrG7iEdDrD+lvhq9b+Y=; b=b/o/N69EqAckmQG/Q9j3UmUjBQ75iUBykwfImRJ/0+1VpUPpu0JkhqXtqRB3la5Q8y wtTGFOJz9jxHgCF66TU76Vb+V6wr+jOwooKgHRWbEb8VtNoakrxJeVJhiGRkGRPlEcWx L/ItasrbgXImHbpjPrLgnkLal7RrYijuXE6FKM1VQ1C2AYcIcbUUsHvmXMVAJ3ETuCgV gy8jsqzCpyLKPfSoD+Vmjlznr5DqLf7NWbhlT80YKso0Af3T+X2q5UXlTbLRypCKrBQJ W2TsQhRKX1TW3rbaTs0z5fjUSVsguLyvWj5MPFpLjMr5EJv6ZyCHg25MQxSJ8zZj1C7E +I4Q== X-Gm-Message-State: APjAAAWGIJylBzqYua4ew3Kjs+p41JB08SAfbFgwNASD7MKA/FTV8h74 urzJ4+UPSRzJhR6DauvZt5UXCJBYbh1Wf2v3pg== X-Google-Smtp-Source: APXvYqzVMW7ZpyGgokJUcSCK7L/y/5JPgpFydMMciElEGgigd86Kx6iVdkJ9DllqyDJwqdvCeGP4prR+IMTFayDRfYw= X-Received: by 2002:a2e:95d5:: with SMTP id y21mr52720445ljh.84.1561048742412; Thu, 20 Jun 2019 09:39:02 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Rakesh Gandhi Date: Thu, 20 Jun 2019 12:38:51 -0400 Message-ID: To: Greg Mirsky Cc: IPPM Chairs , IETF IPPM WG , draft-mirsky-ippm-stamp-option-tlv@ietf.org Content-Type: multipart/alternative; boundary="000000000000c4c476058bc3fb76" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 20 Jun 2019 16:39:06 -0000 --000000000000c4c476058bc3fb76 Content-Type: text/plain; charset="UTF-8" Hi Greg, Authors, It is good to see the TLV extensions for STAMP. As STAMP is defined for carrying timestamps and sequence numbers, the TLVs should be for the related extensions. The direct measurement TLV proposed in the draft may not be hardware friendly for actual data traffic loss measurement due to the need to search the presence of the TLV and the counter offset not always fixed due to the variable length payload. Also, it overloads the delay measurement probes just for measuring packet loss which complicates the implementation. For direct mode loss measurement, there is a simple new message defined in *draft-gandhi-spring-twamp-srpm* which is hardware friendly (just like LM using RFC 6374 using a separate message) and does not overload the existing protocol used for delay measurement. FYI, ITU Y.1731 also defines separate DMM and LMM messages for delay and loss measurements. Thanks, Rakesh On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky wrote: > Dear Chairs, et al., > authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable > and detailed enough to ask for your consideration to start the WG Adoption > Poll. > > Regards, > Greg > _______________________________________________ > ippm mailing list > ippm@ietf.org > https://www.ietf.org/mailman/listinfo/ippm > --000000000000c4c476058bc3fb76 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hi G= reg, Authors,

=C2=A0

It i= s good to see the TLV extensions for STAMP. As STAMP is defined for carrying timestamps and sequence numbers, the TLVs should be for the related extensions.

=C2=A0

The = direct measurement TLV proposed in the draft may not be hardware friendly for actual data traffic loss measurement= due to the need to search the presence of the TLV and the counter offset not alway= s fixed due to the variable length payload. Also, it overloads the delay measurement probes just for measuring packet loss which complicates the imp= lementation.

=C2=A0

For direct mode loss measurement, there is a simple new messa=
ge defined in draft-gandhi-spring-twamp-srpm which is hardware frien=
dly (just like LM using RFC 6374 using a separate message) and does not ove=
rload the existing protocol used for delay measurement.=

=C2=A0
FYI, ITU =
Y.1731 also defines separate DMM and LMM messages for delay and loss measur=
ements.
=C2=A0
Thanks,
Rakesh
=C2=A0

= On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear Chairs, et al.,authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable a= nd detailed enough to ask for your consideration to start the WG Adoption P= oll.

Regards,
Greg
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--000000000000c4c476058bc3fb76-- From nobody Fri Jun 21 00:10:54 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 0E7FF120172; Fri, 21 Jun 2019 00:10:53 -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_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 UdZuI_zTCFzP; Fri, 21 Jun 2019 00:10:51 -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 04A4D12016F; Fri, 21 Jun 2019 00:10:51 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id A469BD52F88AFE5AAC57; Fri, 21 Jun 2019 08:10:48 +0100 (IST) Received: from NKGEML412-HUB.china.huawei.com (10.98.56.73) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Fri, 21 Jun 2019 08:10:48 +0100 Received: from NKGEML515-MBX.china.huawei.com ([fe80::a54a:89d2:c471:ff]) by nkgeml412-hub.china.huawei.com ([10.98.56.73]) with mapi id 14.03.0415.000; Fri, 21 Jun 2019 15:10:21 +0800 From: Tianran Zhou To: "ippm@ietf.org" CC: "draft-zhou-ippm-enhanced-alternate-marking.authors@ietf.org" Thread-Topic: New Version Notification for draft-zhou-ippm-enhanced-alternate-marking-02.txt Thread-Index: AQHVJ/znwS+QXjUlukKA8oOvz2+bTKalq9oA Date: Fri, 21 Jun 2019 07:10:21 +0000 Message-ID: References: <156109951709.12258.13299135793211387186.idtracker@ietfa.amsl.com> In-Reply-To: <156109951709.12258.13299135793211387186.idtracker@ietfa.amsl.com> 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; 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Fri, 21 Jun 2019 01:37:29 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Fri, 21 Jun 2019 17:37:16 +0900 Message-ID: To: Rakesh Gandhi Cc: IPPM Chairs , IETF IPPM WG , draft-mirsky-ippm-stamp-option-tlv@ietf.org Content-Type: multipart/alternative; boundary="000000000000753d10058bd15fe1" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 21 Jun 2019 08:37:35 -0000 --000000000000753d10058bd15fe1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Rakesh, thank you for your review and comments on the STAMP option TLV draft. Please find my answers and notes in-line tagged GIM>>. Regards, Greg On Fri, Jun 21, 2019 at 1:39 AM Rakesh Gandhi wrote: > Hi Greg, Authors, > > > > It is good to see the TLV extensions for STAMP. As STAMP is defined for > carrying timestamps and sequence numbers, the TLVs should be for the > related extensions. > GIM>> STAMP is defined in the draft-ietf-ippm-stamp as the follows: 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 direct measurement TLV proposed in the draft may not be hardware > friendly for actual data traffic loss measurement due to the need to sear= ch > the presence of the TLV and the counter offset not always fixed due to th= e > variable length payload. Also, it overloads the delay measurement probes > just for measuring packet loss which complicates the implementation. > GIM>> The Direct Loss TLV is intended to immediately follow the STAMP test packet and thus its location is known. We'll work on the text to guide implementations to be more HW friendly and support efficient testing. > > > For direct mode loss measurement, there is a simple new message defined i= n *draft-gandhi-spring-twamp-srpm* which is hardware friendly (just like LM= using RFC 6374 using a separate message) and does not overload the existin= g protocol used for delay measurement. > > GIM>> Thank you for pointing to the draft. I've reviewed it and shared my comments. As I've noted earlier, I believe that the proposed packet is not backward compatible with TWAMP-Light while one of the goals of STAMP is to be able to interwork with TWAMP-Light Session-Sender or Session-Reflector in unauthenticated mode. > > > FYI, ITU Y.1731 also defines separate DMM and LMM messages for delay and = loss measurements. > > GIM>> Thank you for reminding us that. On the issue of reviewing existing solutions for support of both direct and synthetic packet loss measurement, I'll note that RFC 6374 uses the same message, Loss Measurement, for both synthetic and direct measurement methods. > > > Thanks, > > Rakesh > > > > > On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky wrote= : > >> Dear Chairs, et al., >> authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable >> and detailed enough to ask for your consideration to start the WG Adopti= on >> Poll. >> >> Regards, >> Greg >> _______________________________________________ >> ippm mailing list >> ippm@ietf.org >> https://www.ietf.org/mailman/listinfo/ippm >> > --000000000000753d10058bd15fe1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Rakesh,
thank you for your review = and comments on the STAMP option TLV draft. Please find my answers and note= s in-line tagged GIM>>.

Regards,
G= reg

On Fri, Jun 21, 2019 at 1:39 AM Rakesh Gandhi <rgandhi.ietf@gmail.com> wrote:

Hi Greg, Authors= ,

=C2=A0

It is good to se= e the TLV extensions for STAMP. As STAMP is defined for carrying timestamps and sequence numbers, the TLVs should be for the related extensions.

GIM= >> STAMP is defined in the draft-ietf-ippm-stamp=C2=A0as the follows:
=C2=A0 =C2=A0This document describes a Simple Two-way Active Measur= ement Protocol
=C2=A0 =C2=A0which enables the measurement of both one-wa= y and round-trip
=C2=A0 =C2=A0performance metrics like delay, delay vari= ation, and packet loss.

=C2=A0

The direct measu= rement TLV proposed in the draft may not be hardware friendly for actual data traffic loss measurement= due to the need to search the presence of the TLV and the counter offset not alway= s fixed due to the variable length payload. Also, it overloads the delay measurement probes just for measuring packet loss which complicates the imp= lementation.

GIM>> The Direct Loss = TLV is intended to immediately follow the STAMP test packet and thus its lo= cation is known. We'll work on the text to guide implementations to be = more HW friendly and support efficient testing.=C2=A0

=C2=A0

For direct mode loss measurement, there is a simple new message defined i=
n draft-gandhi-spring-twamp-srpm which is hardware friendly (just li=
ke LM using RFC 6374 using a separate message) and does not overload the ex=
isting protocol used for delay measurement.=C2=A0
GIM>> Thank you for pointing to the draft. I've review= ed it and shared my comments. As I've noted earlier, I believe that the= proposed packet is not backward compatible with TWAMP-Light while one of t= he goals of STAMP is to be able to interwork with TWAMP-Light Session-Sende= r or Session-Reflector in unauthenticated mode.=C2=A0
=C2=A0
FYI, ITU Y.1731 also defines separa=
te DMM and LMM messages for delay and loss measurements.
=
GIM>> Thank you for reminding us that. On the issue= of reviewing existing solutions for support of both direct and synthetic p= acket loss measurement, I'll note that RFC 6374 uses the same message, = Loss Measurement, for both synthetic and direct measurement methods.
<= 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">
<=
/span>
=C2=A0
Thanks,=

Rakesh
=C2=A0

= On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear = Chairs, et al.,
authors of draft-mirsky-ippm-stamp-option-tlv believe t= hat it is stable and detailed enough to ask for your consideration to start= the WG Adoption Poll.

Regards,
Greg
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
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mapi id 14.03.0415.000; Mon, 24 Jun 2019 16:59:28 +0800 From: Tianran Zhou To: Greg Mirsky , IETF IPPM WG CC: "draft-mirsky-ippm-stamp-option-tlv@ietf.org" Thread-Topic: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv Thread-Index: AQHVJzbIPNuLaD81EkmxWIGmMvnQLqaqhWLw Date: Mon, 24 Jun 2019 08:59:28 +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: multipart/alternative; boundary="_000_BBA82579FD347748BEADC4C445EA0F21BEE61343NKGEML515MBSchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 24 Jun 2019 08:59:46 -0000 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Ol7xSwva1qmNBvvfrE1C0Z9/3LB0wUGBkEcDe/62StzRJPE8MXxofFdhpSSs0787QguX Vnag== X-Gm-Message-State: APjAAAVJQJr7JmACZLWg8VvhwekrPauKRTjEX06VYGZeGp5vdgJQll+f CJRalb+yUKQs7ag6DJHd7Obj7vcjsrcDVyFdDQ== X-Google-Smtp-Source: APXvYqwa8q16Tl8GAj/kWL87daqAjqmcmg6N9BxyHt3ep3PkGrPvG324fgr/vqqmZZ+dIBV67yOBhzH0CQ18iokK6C0= X-Received: by 2002:a2e:95d5:: with SMTP id y21mr63284626ljh.84.1561379103720; Mon, 24 Jun 2019 05:25:03 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Rakesh Gandhi Date: Mon, 24 Jun 2019 08:24:52 -0400 Message-ID: To: Greg Mirsky Cc: IPPM Chairs , IETF IPPM WG , draft-mirsky-ippm-stamp-option-tlv@ietf.org Content-Type: multipart/alternative; boundary="000000000000d65eef058c10e686" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 24 Jun 2019 12:25:09 -0000 --000000000000d65eef058c10e686 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Greg, Thank you for the replies. However, they do not answer my comments. Adding a TLV for the direct-mode loss measurement for the delay measurement message unnecessarily overloads the message. It is not hardware friendly for the reasons mentioned earlier, to look for the TLV, as it may or may not be there. Further, the hardware will have to be capable to add timestamps as well as counters in the overloaded message. It is much easier to have a simple message for loss measurement to just carry counters as is done in other protocols (e.g. RFC 6374 and Y.1731). Thanks, Rakesh On Fri, Jun 21, 2019 at 4:37 AM Greg Mirsky wrote: > Hi Rakesh, > thank you for your review and comments on the STAMP option TLV draft. > Please find my answers and notes in-line tagged GIM>>. > > Regards, > Greg > > On Fri, Jun 21, 2019 at 1:39 AM Rakesh Gandhi > wrote: > >> Hi Greg, Authors, >> >> >> >> It is good to see the TLV extensions for STAMP. As STAMP is defined for >> carrying timestamps and sequence numbers, the TLVs should be for the >> related extensions. >> > GIM>> STAMP is defined in the draft-ietf-ippm-stamp > as the follows: > 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 direct measurement TLV proposed in the draft may not be hardware >> friendly for actual data traffic loss measurement due to the need to sea= rch >> the presence of the TLV and the counter offset not always fixed due to t= he >> variable length payload. Also, it overloads the delay measurement probes >> just for measuring packet loss which complicates the implementation. >> > GIM>> The Direct Loss TLV is intended to immediately follow the STAMP tes= t > packet and thus its location is known. We'll work on the text to guide > implementations to be more HW friendly and support efficient testing. > >> >> >> For direct mode loss measurement, there is a simple new message defined = in *draft-gandhi-spring-twamp-srpm* which is hardware friendly (just like L= M using RFC 6374 using a separate message) and does not overload the existi= ng protocol used for delay measurement. >> >> GIM>> Thank you for pointing to the draft. I've reviewed it and shared m= y > comments. As I've noted earlier, I believe that the proposed packet is no= t > backward compatible with TWAMP-Light while one of the goals of STAMP is t= o > be able to interwork with TWAMP-Light Session-Sender or Session-Reflector > in unauthenticated mode. > >> >> >> FYI, ITU Y.1731 also defines separate DMM and LMM messages for delay and= loss measurements. >> >> GIM>> Thank you for reminding us that. On the issue of reviewing existin= g > solutions for support of both direct and synthetic packet loss measuremen= t, > I'll note that RFC 6374 uses the same message, Loss Measurement, for both > synthetic and direct measurement methods. > >> >> >> Thanks, >> >> Rakesh >> >> >> >> >> On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky >> wrote: >> >>> Dear Chairs, et al., >>> authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable >>> and detailed enough to ask for your consideration to start the WG Adopt= ion >>> Poll. >>> >>> Regards, >>> Greg >>> _______________________________________________ >>> ippm mailing list >>> ippm@ietf.org >>> https://www.ietf.org/mailman/listinfo/ippm >>> >> --000000000000d65eef058c10e686 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Greg,
Thank you for the replies. However= , they do not answer my comments.
Adding a TLV for the direct= -mode loss measurement for the delay measurement message unnecessarily over= loads the message. It is not hardware friendly for the reasons mentioned ea= rlier, to look for the TLV, as it may or may not be there. Further, the har= dware will have to be capable to add timestamps as well as counters in the = overloaded message. It is much easier to have a simple message for loss mea= surement to just carry counters as is done in other protocols (e.g. RFC 637= 4 and Y.1731).

Thanks,
Rakesh
=


On Fri, Jun 21, 2019 at 4:37 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Hi Rakesh,
thank you for your review and comments on the STAM= P option TLV draft. Please find my answers and notes in-line tagged GIM>= >.

Regards,
Greg

On Fri, Jun 21,= 2019 at 1:39 AM Rakesh Gandhi <rgandhi.ietf@gmail.com> wrote:

Hi Greg, Authors= ,

=C2=A0

It is good to se= e the TLV extensions for STAMP. As STAMP is defined for carrying timestamps and sequence numbers, the TLVs should be for the related extensions.

GIM= >> STAMP is defined in the draft-ietf-ippm-stamp=C2=A0= as the follows:
=C2=A0 =C2=A0This document describes a Simple Two= -way Active Measurement Protocol
=C2=A0 =C2=A0which enables the measurem= ent of both one-way and round-trip
=C2=A0 =C2=A0performance metrics like= delay, delay variation, and packet loss.

=C2=A0

The direct measu= rement TLV proposed in the draft may not be hardware friendly for actual data traffic loss measurement= due to the need to search the presence of the TLV and the counter offset not alway= s fixed due to the variable length payload. Also, it overloads the delay measurement probes just for measuring packet loss which complicates the imp= lementation.

GIM>> The Direct Loss = TLV is intended to immediately follow the STAMP test packet and thus its lo= cation is known. We'll work on the text to guide implementations to be = more HW friendly and support efficient testing.=C2=A0

=C2=A0

For direct mode loss measurement, there is a simple new message defined i=
n draft-gandhi-spring-twamp-srpm which is hardware friendly (just li=
ke LM using RFC 6374 using a separate message) and does not overload the ex=
isting protocol used for delay measurement.=C2=A0
GIM>> Thank you for pointing to the draft. I've review= ed it and shared my comments. As I've noted earlier, I believe that the= proposed packet is not backward compatible with TWAMP-Light while one of t= he goals of STAMP is to be able to interwork with TWAMP-Light Session-Sende= r or Session-Reflector in unauthenticated mode.=C2=A0
=C2=A0
FYI, ITU Y.1731 also defines separa=
te DMM and LMM messages for delay and loss measurements.
=
GIM>> Thank you for reminding us that. On the issue= of reviewing existing solutions for support of both direct and synthetic p= acket loss measurement, I'll note that RFC 6374 uses the same message, = Loss Measurement, for both synthetic and direct measurement methods.
<= 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">
<=
/span>
=C2=A0
Thanks,=

Rakesh
=C2=A0

= On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear = Chairs, et al.,
authors of draft-mirsky-ippm-stamp-option-tlv believe t= hat it is stable and detailed enough to ask for your consideration to start= the WG Adoption Poll.

Regards,
Greg
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--000000000000d65eef058c10e686-- From nobody Mon Jun 24 08:45:07 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 ED0331201A3; Mon, 24 Jun 2019 08:45:02 -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 yTUMwHivbNSL; Mon, 24 Jun 2019 08:44:59 -0700 (PDT) Received: from mail-lf1-x12b.google.com (mail-lf1-x12b.google.com [IPv6:2a00:1450:4864:20::12b]) (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 C6D46120196; Mon, 24 Jun 2019 08:44:58 -0700 (PDT) Received: by mail-lf1-x12b.google.com with SMTP id y17so10437349lfe.0; Mon, 24 Jun 2019 08:44:58 -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=2QvZEfbUt33fCt6LMxNPSNojprOmudg7PhISKwhEhoc=; b=C+En/1uX9M2WayQreGLdMYKjdSXSdJq4pn0vwiLdRux8QmfjsgJPIVdqfp2+EzUS7L fy5dWANm3OD+JF6t+oCfZ74k9idzAn7bZzeiXYGhIax8M/5BJlSOYSkbvVSgO1DuXRgQ 6/NDJ7m2p+kUpGhsT3Grvt7fvioiisXZQ1q1AWLWQQLXfZ9ozkN9PiXvsNlqbznODNmb 75zLMs8Tx3V4LmlfvNOWi04cedLaTdKO/KE/dUznPFDFn+sXA0GkT7KgDzE+X8Ojwdoq KvTK+RCBF76X3ja7oanuYEfSpUSzd1Xkj7F4gHlLwbJczEhZz9r2dUwNm594jiY73pQo yxkw== 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=2QvZEfbUt33fCt6LMxNPSNojprOmudg7PhISKwhEhoc=; b=CC0s34j2/YE6q27h0PJcJfxac/bvvNdSU5SqlginIsBd8RukFMcJkt5T4voxdgqJHw Ya0s0c8r1l2xbj/s/LP9AsQX/aIa6AWBsA4ahnspg2lv1IFfdrMk0+IOLfDPCepxDGwD K4QlsUFgYI28er7l+j1cA+RWd/iqcfGD5lumPvRMaFU5m5Q/wa6EJty9gkweofXJNBAg InjqXdGslJWyXKS5Fk8cGPjeY8mVRTjtINZVuO1KRRhlpMGNY8UDPPh3CmSp5N9sb29m PMJ4t9nv/uUxpWuVCBZVbh5BtXRt3EvMKNx1wDv2/MrTEEkFzOPFB0LhZPDN6dei85Yo GiXg== X-Gm-Message-State: APjAAAWUmW6eT2T+N7zbYHWhoXiqme+paFF0YsQ5tz4pHJNWXwfQQAh0 QW/1cty1AuONzYxzGL2hWkzuKO+KCe21Qjb1sXU= X-Google-Smtp-Source: APXvYqyIutEesPRo1irw49aW1sOt3rPe1EnLdamBhoPgXxN0UZZky7y5Ec6s8Fe/qN95BxpDFraify3y5NN5yvOiLTo= X-Received: by 2002:ac2:5609:: with SMTP id v9mr19390383lfd.27.1561391096926; Mon, 24 Jun 2019 08:44:56 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Mon, 24 Jun 2019 08:44:45 -0700 Message-ID: To: Tianran Zhou Cc: IETF IPPM WG , "draft-mirsky-ippm-stamp-option-tlv@ietf.org" Content-Type: multipart/alternative; boundary="000000000000b01cd3058c13b15b" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 24 Jun 2019 15:45:03 -0000 --000000000000b01cd3058c13b15b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Tianran, thank you for your interest in the proposal on the optional extensions of STAMP. Please find my answers in-line below tagged GIM>>. Regards, Greg On Mon, Jun 24, 2019 at 1:59 AM Tianran Zhou wrote= : > Hi Greg, > > > > Several clarification questions after reading this draft. > > > > 1. Maybe wrt to section 4. Could you please explicitly describe the > mechanism to detect the existence of TLVs, in addition to the fixed messa= ge > part? > GIM>> Since the length of the base STAMP packet, and the mode, unauthenticated or authenticated, are known, the receiver of a STAMP packet can determine if there are any TLV by comparing the length of the base STAMP packet with the value of the Total length field of IP header. > > > 2. Could you please describe the use case for each TLV you proposed? > Especially the =E2=80=9CLocation TLV=E2=80=9D and the =E2=80=9CClass of S= ervice TLV=E2=80=9D. I can > hardly understand why these two are useful, and how to use them to do > measurement/collection. > GIM>> We'll expand the informational text for TLVs. For the Location TLV, the use is described in the draft as follows: The Location TLV MAY be used to determine the last-hop addressing for STAMP packets including source and destination IP addresses as well as the MAC address of the last-hop router. Last-hop MAC address MAY be monitored by the Session-Sender whether there has been a path switch on the last hop, closest to the Session-Reflector. The IP addresses and UDP port will indicate if there is a NAT router on the path, and allows the Session-Sender to identify the IP address of the Session-Reflector behind the NAT, detect changes in the NAT mapping that could cause sending the STAMP packets to the wrong Session- Reflector. The use case of the Class of Service TLV is the same as of RFC 7750 and draft-bailmir-ippm-twamp-dscp-ctrl-mon . > > > Thanks, > > Tianran > > > > *From:* ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Greg Mirsky > *Sent:* Thursday, June 20, 2019 3:06 PM > *To:* IPPM Chairs ; IETF IPPM WG > *Cc:* draft-mirsky-ippm-stamp-option-tlv@ietf.org > *Subject:* [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv > > > > Dear Chairs, et al., > > authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable > and detailed enough to ask for your consideration to start the WG Adoptio= n > Poll. > > > > Regards, > > Greg > --000000000000b01cd3058c13b15b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Tianran,
thank you for your intere= st in the proposal on the optional extensions of STAMP. Please find my answ= ers in-line below tagged GIM>>.

Regards,
Greg

On Mon, Jun 24, 2019 at 1:59 AM Tianran Zhou <zhoutianran@huawei.com> wrote:

Hi Greg,=

=C2=A0

Several clarificat= ion questions after reading this draft.

=C2=A0

1. Maybe wrt to se= ction 4. Could you please explicitly describe the mechanism to detect the e= xistence of TLVs, in addition to the fixed message part?

GIM>> Since the length of the base STAMP packet= , and the mode, unauthenticated or authenticated, are known, the receiver o= f a STAMP packet can determine if there are any TLV by comparing the length= of the base STAMP packet with the value of the Total length field of IP he= ader.=C2=A0=C2=A0
<= p class=3D"MsoNormal">

=C2=A0

2. Could you pleas= e describe the use case for each TLV you proposed? Especially the =E2=80=9CLocation TLV=E2=80=9D and the =E2=80=9CClass of Servic= e TLV=E2=80=9D. I can hardly understand why these two are useful, and how to use them to d= o measurement/collection.

GIM>&g= t; We'll expand the informational text for TLVs. For the Location TLV, = the use is described in the draft as follows:

=C2=A0 =C2=A0Th= e Location TLV MAY be used to determine the last-hop addressing for
=C2= =A0 =C2=A0STAMP packets including source and destination IP addresses as we= ll
=C2=A0 =C2=A0as the MAC address of the last-hop router.=C2=A0 Last-ho= p MAC address MAY
=C2=A0 =C2=A0be monitored by the Session-Sender whethe= r there has been a path
=C2=A0 =C2=A0switch on the last hop, closest to = the Session-Reflector.=C2=A0 The IP
=C2=A0 =C2=A0addresses and UDP port = will indicate if there is a NAT router on the
=C2=A0 =C2=A0path, and all= ows the Session-Sender to identify the IP address of the
=C2=A0 =C2=A0Se= ssion-Reflector behind the NAT, detect changes in the NAT mapping
=C2=A0= =C2=A0that could cause sending the STAMP packets to the wrong Session-
= =C2=A0 =C2=A0Reflector.

The use case of the Cl= ass of Service TLV is the same as of RFC 7750=C2=A0and=C2=A0draft-bailmir-ipp= m-twamp-dscp-ctrl-mon.

=

=C2=A0

Thanks,<= /u>

Tianran<= /u>

=C2=A0

From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of Greg Mirsky
Sent: Thursday, June 20, 2019 3:06 PM
To: IPPM Chairs <ippm-chairs@ietf.org>; IETF IPPM WG <ippm@ietf.org>
Cc: draft-mirsky-ippm-stamp-option-tlv@ietf.org
Subject: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv=

=C2=A0

Dear Chairs, et al.,<= /u>

authors of draft-mirsky-ippm-st= amp-option-tlv believe that it is stable and detailed enough to ask for you= r consideration to start the WG Adoption Poll.

=C2=A0

Regards,

Greg

--000000000000b01cd3058c13b15b-- From nobody Mon Jun 24 08:50:09 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 233791201CB; Mon, 24 Jun 2019 08:50:04 -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 EQwhHBpSlQHO; Mon, 24 Jun 2019 08:50:01 -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 A87A512019D; Mon, 24 Jun 2019 08:50:00 -0700 (PDT) Received: by mail-lj1-x229.google.com with SMTP id i21so13107439ljj.3; Mon, 24 Jun 2019 08:50:00 -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=xXWz8T4FO0FLAVQWib5ogjUvW5OjzLQ5ZABapk2fLYQ=; b=e7WhO4f6tKEBrA5IsowbDYBIqJvIE39ZSiXHUWNGUGOWMeXFHSVTBdt6T3GfrUJY0X gBIiUdD1QC4gSrFNB3sIktbm2weRbdFT3FuVPfoXrUbdl8cNB1g68imh9hSDktCagno9 MtrA5j09LxSn6NeE9Umoa99i+RFsHzqFpoOXAhPAYcIWl4b9LnKecSDxiMZGtWv4O2wM jxr1p+fZZLQKClrMYvfOC8oIe++OCnZBhciucnS6n5COrBbBZi2Xs7p1R/qjqehHFqh6 DcnFYOBgnGLulEYzJnYd3bhtJVDL7FSkRxczy5RmhIzVajCCMQkn3t6c/spxVUmdZqay W2wA== 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=xXWz8T4FO0FLAVQWib5ogjUvW5OjzLQ5ZABapk2fLYQ=; b=c7ksGW+ElZHJBxVurbbdkJ60SpGabNZ0rSVh9u4sLdZ/j7KBDXzjzy0WavzapbXU60 hLjyCRmn52w8klnLK7pw5vgF06+ZNWNdPBdN7o/lyxUj+FdgxN/s88cq8DMkRS1zfl1O Dix97SMGUnNd/Qlekhj75ti5E40/2IgcjMhDHkKsgKq8f7g2WUrPgIlT784WJrmGUJXe qSkI62Z7665x5Xn5/1tRhlo8TESsyO1HzuzcpDL5xHga9aCNg6Z5zqW2e1upLwzW+jSq 6XtgzeV2Ew0yg6u1IB0jyxZpsRh5tWlkxQflVV8kzuFss4YDb+OyjFKhdim3PZhWnSzX 9YSw== X-Gm-Message-State: APjAAAVuOOA4zwd2+FCtsxM5ygGHhmDMKV6dfyV9GWEKt2BwDrDvdvVV wupC/q+v0N6l4vJDyvIwl9YFyud2CpnySKp2/AA= X-Google-Smtp-Source: APXvYqxqunHvwN2QGm8SkHnk+OEk42cGdSALywz3HjyWUPc0RT2NOzZDEVU1lINSyWCkT/shvUur17JLaA74xLNgDRA= X-Received: by 2002:a2e:6c0f:: with SMTP id h15mr18360008ljc.36.1561391398848; Mon, 24 Jun 2019 08:49:58 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Mon, 24 Jun 2019 08:49:47 -0700 Message-ID: To: Rakesh Gandhi Cc: IPPM Chairs , IETF IPPM WG , draft-mirsky-ippm-stamp-option-tlv@ietf.org Content-Type: multipart/alternative; boundary="000000000000af0f7e058c13c3c5" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 24 Jun 2019 15:50:07 -0000 --000000000000af0f7e058c13c3c5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Rakesh, we're observing that the use of TLV becomes accepted in the fast path. Overlay encapsulations with extensible headers like Geneve, GUE, and NSH have been standardized already or will be published as Standard track RFCs soon. Regards, Greg On Mon, Jun 24, 2019 at 5:25 AM Rakesh Gandhi wrote: > Hi Greg, > Thank you for the replies. However, they do not answer my comments. > Adding a TLV for the direct-mode loss measurement for the delay > measurement message unnecessarily overloads the message. It is not hardwa= re > friendly for the reasons mentioned earlier, to look for the TLV, as it ma= y > or may not be there. Further, the hardware will have to be capable to add > timestamps as well as counters in the overloaded message. It is much easi= er > to have a simple message for loss measurement to just carry counters as i= s > done in other protocols (e.g. RFC 6374 and Y.1731). > > Thanks, > Rakesh > > > On Fri, Jun 21, 2019 at 4:37 AM Greg Mirsky wrote= : > >> Hi Rakesh, >> thank you for your review and comments on the STAMP option TLV draft. >> Please find my answers and notes in-line tagged GIM>>. >> >> Regards, >> Greg >> >> On Fri, Jun 21, 2019 at 1:39 AM Rakesh Gandhi >> wrote: >> >>> Hi Greg, Authors, >>> >>> >>> >>> It is good to see the TLV extensions for STAMP. As STAMP is defined for >>> carrying timestamps and sequence numbers, the TLVs should be for the >>> related extensions. >>> >> GIM>> STAMP is defined in the draft-ietf-ippm-stamp >> as the follows= : >> 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 direct measurement TLV proposed in the draft may not be hardware >>> friendly for actual data traffic loss measurement due to the need to se= arch >>> the presence of the TLV and the counter offset not always fixed due to = the >>> variable length payload. Also, it overloads the delay measurement probe= s >>> just for measuring packet loss which complicates the implementation. >>> >> GIM>> The Direct Loss TLV is intended to immediately follow the STAMP >> test packet and thus its location is known. We'll work on the text to gu= ide >> implementations to be more HW friendly and support efficient testing. >> >>> >>> >>> For direct mode loss measurement, there is a simple new message defined= in *draft-gandhi-spring-twamp-srpm* which is hardware friendly (just like = LM using RFC 6374 using a separate message) and does not overload the exist= ing protocol used for delay measurement. >>> >>> GIM>> Thank you for pointing to the draft. I've reviewed it and shared >> my comments. As I've noted earlier, I believe that the proposed packet i= s >> not backward compatible with TWAMP-Light while one of the goals of STAMP= is >> to be able to interwork with TWAMP-Light Session-Sender or >> Session-Reflector in unauthenticated mode. >> >>> >>> >>> FYI, ITU Y.1731 also defines separate DMM and LMM messages for delay an= d loss measurements. >>> >>> GIM>> Thank you for reminding us that. On the issue of reviewing >> existing solutions for support of both direct and synthetic packet loss >> measurement, I'll note that RFC 6374 uses the same message, Loss >> Measurement, for both synthetic and direct measurement methods. >> >>> >>> >>> Thanks, >>> >>> Rakesh >>> >>> >>> >>> >>> On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky >>> wrote: >>> >>>> Dear Chairs, et al., >>>> authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stabl= e >>>> and detailed enough to ask for your consideration to start the WG Adop= tion >>>> Poll. >>>> >>>> Regards, >>>> Greg >>>> _______________________________________________ >>>> ippm mailing list >>>> ippm@ietf.org >>>> https://www.ietf.org/mailman/listinfo/ippm >>>> >>> --000000000000af0f7e058c13c3c5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Rakesh,
we're observing that the use of TLV bec= omes accepted in the fast path. Overlay encapsulations with extensible head= ers like Geneve, GUE, and NSH have been standardized already or will be pub= lished as Standard track RFCs soon.

Regards,
=
Greg

On Mon, Jun 24, 2019 at 5:25 AM Rakesh Gandhi <rgandhi.ietf@gmail.com> wrote:
<= div>Hi Greg,
Thank you for the replies. However, they do not answ= er my comments.
Adding a TLV for the direct-mode loss measure= ment for the delay measurement message unnecessarily overloads the message.= It is not hardware friendly for the reasons mentioned earlier, to look for= the TLV, as it may or may not be there. Further, the hardware will have to= be capable to add timestamps as well as counters in the overloaded message= . It is much easier to have a simple message for loss measurement to just c= arry counters as is done in other protocols (e.g. RFC 6374 and Y.1731).

Thanks,
Rakesh


On = Fri, Jun 21, 2019 at 4:37 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
=
Hi Rakesh,
thank you for your review and comments on the STAMP= option TLV draft. Please find my answers and notes in-line tagged GIM>&= gt;.

Regards,
Greg

On Fri, Jun 21, = 2019 at 1:39 AM Rakesh Gandhi <rgandhi.ietf@gmail.com> wrote:

Hi Greg, Authors= ,

=C2=A0

It is good to se= e the TLV extensions for STAMP. As STAMP is defined for carrying timestamps and sequence numbers, the TLVs should be for the related extensions.

GIM= >> STAMP is defined in the draft-ietf-ippm-stamp=C2=A0= as the follows:
=C2=A0 =C2=A0This document describes a Simple Two= -way Active Measurement Protocol
=C2=A0 =C2=A0which enables the measurem= ent of both one-way and round-trip
=C2=A0 =C2=A0performance metrics like= delay, delay variation, and packet loss.

=C2=A0

The direct measu= rement TLV proposed in the draft may not be hardware friendly for actual data traffic loss measurement= due to the need to search the presence of the TLV and the counter offset not alway= s fixed due to the variable length payload. Also, it overloads the delay measurement probes just for measuring packet loss which complicates the imp= lementation.

GIM>> The Direct Loss = TLV is intended to immediately follow the STAMP test packet and thus its lo= cation is known. We'll work on the text to guide implementations to be = more HW friendly and support efficient testing.=C2=A0

=C2=A0

For direct mode loss measurement, there is a simple new message defined i=
n draft-gandhi-spring-twamp-srpm which is hardware friendly (just li=
ke LM using RFC 6374 using a separate message) and does not overload the ex=
isting protocol used for delay measurement.=C2=A0
GIM>> Thank you for pointing to the draft. I've review= ed it and shared my comments. As I've noted earlier, I believe that the= proposed packet is not backward compatible with TWAMP-Light while one of t= he goals of STAMP is to be able to interwork with TWAMP-Light Session-Sende= r or Session-Reflector in unauthenticated mode.=C2=A0
=C2=A0
FYI, ITU Y.1731 also defines separa=
te DMM and LMM messages for delay and loss measurements.
=
GIM>> Thank you for reminding us that. On the issue= of reviewing existing solutions for support of both direct and synthetic p= acket loss measurement, I'll note that RFC 6374 uses the same message, = Loss Measurement, for both synthetic and direct measurement methods.
<= 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">
<=
/span>
=C2=A0
Thanks,=

Rakesh
=C2=A0

= On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear = Chairs, et al.,
authors of draft-mirsky-ippm-stamp-option-tlv believe t= hat it is stable and detailed enough to ask for your consideration to start= the WG Adoption Poll.

Regards,
Greg
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--000000000000af0f7e058c13c3c5-- From nobody Mon Jun 24 12:13:07 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 A86A0120152; Mon, 24 Jun 2019 12:13:05 -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 omG0UsS5U--z; Mon, 24 Jun 2019 12:13:01 -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 29115120058; Mon, 24 Jun 2019 12:13:01 -0700 (PDT) Received: by mail-lj1-x231.google.com with SMTP id 131so13712332ljf.4; Mon, 24 Jun 2019 12:13:01 -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=h+gMFiuju+vwDKdutF0Ks70QdAtibzqu325tXG5pzMI=; b=Ho4A1wdXkRzLM+O7Rf5SN9PG2/Wwtwh4jGGaxD2Ct7zxtwP8rwUcQfp//ycb4NKPAU AibBZicTYh4CyTD5+CKvoCMnzLhQUarUCkHN/t6TCmT5+7z0FfMmlDM//GFOAL84cGm5 /bw9k4IO+7zb8h8+F8xbmLx6TF3v8Ef9zspr9mhkkQtE7ifzyFx4APB/2TbetK8pDSBm fZiGY1ch2+2BLDVH9Pkxp6nUfnjosA0Ux+HtJHNJOup3f+wgL84GzfVGSlxggZBbP4mi nYPhFLTtry8i4l/zS9Ke2JIrHULgKBXvQrdvSySVjNV+oo5EW1gls3WL80GFfya/RwEG hgJQ== 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=h+gMFiuju+vwDKdutF0Ks70QdAtibzqu325tXG5pzMI=; b=d7YsgmvJlZ3fmNkr7m0NCmPk6WKbJXgvejt1gVUjqKaXs99Q7fOqmOwpaMFpFHK6jO yAOoI4r2RRO4jdFh54KuVYt7K1vEfhl9oKJs3PCjlPw8pZhrM3BDijCcC1fP9/8ma8ch SF1+SUyX/8THi8PMYcbQ1PJhoBhV9E90fPrSaWNEht4qUh2y1qvqVgQbsmBDAI/5bTJ7 w8aaRyFawaXgE6ZH86sHInfuq8BNcPxAZhR+jFFmQn1P4+exmJu87oJBSeOa/1dPRVUL N02BzxlxODtzj4pm13mXdH9zIKsYr1hHLRMPIUGiLmt9NoxPh83BIglNDEQN2Ky+R7M4 1Ciw== X-Gm-Message-State: APjAAAUOwz0JBdIwDnL7Kr75UxThqzfEN9QNa3uKm0zllsWlZA2UmGh9 Nq3FtF7/48QmUY/9zj2sAJAnHJfE8AAknM3G9g== X-Google-Smtp-Source: APXvYqyhJYhfYJFIh5eUhzSkJSmEk/Lx1eIas2CI33aq05Amw6gRbtZacx2hFwBLEonMv/Yy1Y5NOZZVSYMFYMesWlk= X-Received: by 2002:a05:651c:95:: with SMTP id 21mr34220345ljq.128.1561403579285; Mon, 24 Jun 2019 12:12:59 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Rakesh Gandhi Date: Mon, 24 Jun 2019 15:12:48 -0400 Message-ID: To: Greg Mirsky Cc: IPPM Chairs , IETF IPPM WG , draft-mirsky-ippm-stamp-option-tlv@ietf.org Content-Type: multipart/alternative; boundary="000000000000b1c5d6058c1699b7" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 24 Jun 2019 19:13:06 -0000 --000000000000b1c5d6058c1699b7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Greg, Thanks for the reply. I think the comment is that it is much simpler to define a new message for LM than to overload DM message + TLV to do LM. If you think there are some cases where both DM+LM combo message is required, then you could position this solution with fixed offset LM TLV using the DM message for that case. Thanks, Rakesh On Mon, Jun 24, 2019 at 11:49 AM Greg Mirsky wrote: > Hi Rakesh, > we're observing that the use of TLV becomes accepted in the fast path. > Overlay encapsulations with extensible headers like Geneve, GUE, and NSH > have been standardized already or will be published as Standard track RFC= s > soon. > > Regards, > Greg > > On Mon, Jun 24, 2019 at 5:25 AM Rakesh Gandhi > wrote: > >> Hi Greg, >> Thank you for the replies. However, they do not answer my comments. >> Adding a TLV for the direct-mode loss measurement for the delay >> measurement message unnecessarily overloads the message. It is not hardw= are >> friendly for the reasons mentioned earlier, to look for the TLV, as it m= ay >> or may not be there. Further, the hardware will have to be capable to ad= d >> timestamps as well as counters in the overloaded message. It is much eas= ier >> to have a simple message for loss measurement to just carry counters as = is >> done in other protocols (e.g. RFC 6374 and Y.1731). >> >> Thanks, >> Rakesh >> >> >> On Fri, Jun 21, 2019 at 4:37 AM Greg Mirsky >> wrote: >> >>> Hi Rakesh, >>> thank you for your review and comments on the STAMP option TLV draft. >>> Please find my answers and notes in-line tagged GIM>>. >>> >>> Regards, >>> Greg >>> >>> On Fri, Jun 21, 2019 at 1:39 AM Rakesh Gandhi >>> wrote: >>> >>>> Hi Greg, Authors, >>>> >>>> >>>> >>>> It is good to see the TLV extensions for STAMP. As STAMP is defined fo= r >>>> carrying timestamps and sequence numbers, the TLVs should be for the >>>> related extensions. >>>> >>> GIM>> STAMP is defined in the draft-ietf-ippm-stamp >>> as the >>> follows: >>> 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 direct measurement TLV proposed in the draft may not be hardware >>>> friendly for actual data traffic loss measurement due to the need to s= earch >>>> the presence of the TLV and the counter offset not always fixed due to= the >>>> variable length payload. Also, it overloads the delay measurement prob= es >>>> just for measuring packet loss which complicates the implementation. >>>> >>> GIM>> The Direct Loss TLV is intended to immediately follow the STAMP >>> test packet and thus its location is known. We'll work on the text to g= uide >>> implementations to be more HW friendly and support efficient testing. >>> >>>> >>>> >>>> For direct mode loss measurement, there is a simple new message define= d in *draft-gandhi-spring-twamp-srpm* which is hardware friendly (just like= LM using RFC 6374 using a separate message) and does not overload the exis= ting protocol used for delay measurement. >>>> >>>> GIM>> Thank you for pointing to the draft. I've reviewed it and shared >>> my comments. As I've noted earlier, I believe that the proposed packet = is >>> not backward compatible with TWAMP-Light while one of the goals of STAM= P is >>> to be able to interwork with TWAMP-Light Session-Sender or >>> Session-Reflector in unauthenticated mode. >>> >>>> >>>> >>>> FYI, ITU Y.1731 also defines separate DMM and LMM messages for delay a= nd loss measurements. >>>> >>>> GIM>> Thank you for reminding us that. On the issue of reviewing >>> existing solutions for support of both direct and synthetic packet loss >>> measurement, I'll note that RFC 6374 uses the same message, Loss >>> Measurement, for both synthetic and direct measurement methods. >>> >>>> >>>> >>>> Thanks, >>>> >>>> Rakesh >>>> >>>> >>>> >>>> >>>> On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky >>>> wrote: >>>> >>>>> Dear Chairs, et al., >>>>> authors of draft-mirsky-ippm-stamp-option-tlv believe that it is >>>>> stable and detailed enough to ask for your consideration to start the= WG >>>>> Adoption Poll. >>>>> >>>>> Regards, >>>>> Greg >>>>> _______________________________________________ >>>>> ippm mailing list >>>>> ippm@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/ippm >>>>> >>>> --000000000000b1c5d6058c1699b7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Greg,
Thanks for the reply.
I think the comment is that it is much simpler to define a new message fo= r LM than to overload DM message + TLV to do LM. If you think there are som= e cases where both DM+LM combo message is required, then you could position= this solution with fixed offset LM TLV using the DM message for that case.=
Thanks,
Rakesh


On Mon, Jun 24,= 2019 at 11:49 AM Greg Mirsky <= gregimirsky@gmail.com> wrote:
Hi Rakesh,
we're observing th= at the use of TLV becomes accepted in the fast path. Overlay encapsulations= with extensible headers like Geneve, GUE, and NSH have been standardized a= lready or will be published as Standard track RFCs soon.

Regards,
Greg

On Mon, Jun 24, 2019 at 5:25 AM Rakesh = Gandhi <rgan= dhi.ietf@gmail.com> wrote:
Hi Greg,
Thank you for th= e replies. However, they do not answer my comments.
Adding a = TLV for the direct-mode loss measurement for the delay measurement message = unnecessarily overloads the message. It is not hardware friendly for the re= asons mentioned earlier, to look for the TLV, as it may or may not be there= . Further, the hardware will have to be capable to add timestamps as well a= s counters in the overloaded message. It is much easier to have a simple me= ssage for loss measurement to just carry counters as is done in other proto= cols (e.g. RFC 6374 and Y.1731).

Thanks,
Rakesh


On Fri, Jun 21, 2019 at 4:37 AM Greg Mirsk= y <gregimirsk= y@gmail.com> wrote:
Hi Rakesh,
thank you for y= our review and comments on the STAMP option TLV draft. Please find my answe= rs and notes in-line tagged GIM>>.

Regards,<= /div>
Greg

On Fri, Jun 21, 2019 at 1:39 AM Rakesh Gandhi <rgandhi.ietf@gmail.c= om> wrote:

Hi Greg, Authors= ,

=C2=A0

It is good to se= e the TLV extensions for STAMP. As STAMP is defined for carrying timestamps and sequence numbers, the TLVs should be for the related extensions.

GIM= >> STAMP is defined in the draft-ietf-ippm-stamp=C2=A0= as the follows:
=C2=A0 =C2=A0This document describes a Simple Two= -way Active Measurement Protocol
=C2=A0 =C2=A0which enables the measurem= ent of both one-way and round-trip
=C2=A0 =C2=A0performance metrics like= delay, delay variation, and packet loss.

=C2=A0

The direct measu= rement TLV proposed in the draft may not be hardware friendly for actual data traffic loss measurement= due to the need to search the presence of the TLV and the counter offset not alway= s fixed due to the variable length payload. Also, it overloads the delay measurement probes just for measuring packet loss which complicates the imp= lementation.

GIM>> The Direct Loss = TLV is intended to immediately follow the STAMP test packet and thus its lo= cation is known. We'll work on the text to guide implementations to be = more HW friendly and support efficient testing.=C2=A0

=C2=A0

For direct mode loss measurement, there is a simple new message defined i=
n draft-gandhi-spring-twamp-srpm which is hardware friendly (just li=
ke LM using RFC 6374 using a separate message) and does not overload the ex=
isting protocol used for delay measurement.=C2=A0
GIM>> Thank you for pointing to the draft. I've review= ed it and shared my comments. As I've noted earlier, I believe that the= proposed packet is not backward compatible with TWAMP-Light while one of t= he goals of STAMP is to be able to interwork with TWAMP-Light Session-Sende= r or Session-Reflector in unauthenticated mode.=C2=A0
=C2=A0
FYI, ITU Y.1731 also defines separa=
te DMM and LMM messages for delay and loss measurements.
=
GIM>> Thank you for reminding us that. On the issue= of reviewing existing solutions for support of both direct and synthetic p= acket loss measurement, I'll note that RFC 6374 uses the same message, = Loss Measurement, for both synthetic and direct measurement methods.
<= 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">
<=
/span>
=C2=A0
Thanks,=

Rakesh
=C2=A0

= On Thu, Jun 20, 2019 at 3:06 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear = Chairs, et al.,
authors of draft-mirsky-ippm-stamp-option-tlv believe t= hat it is stable and detailed enough to ask for your consideration to start= the WG Adoption Poll.

Regards,
Greg
_______________________________________________
ippm mailing list
ippm@ietf.org
https://www.ietf.org/mailman/listinfo/ippm
--000000000000b1c5d6058c1699b7-- From nobody Mon Jun 24 20:19:28 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 7CA6B120220; Mon, 24 Jun 2019 20:19:26 -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=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 MFP0YpglqO46; Mon, 24 Jun 2019 20:19:24 -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 B5B9D1201B0; Mon, 24 Jun 2019 20:19:23 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 7769F6CD28C22AC4540C; Tue, 25 Jun 2019 04:19:21 +0100 (IST) Received: from NKGEML413-HUB.china.huawei.com (10.98.56.74) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Tue, 25 Jun 2019 04:19:20 +0100 Received: from NKGEML515-MBS.china.huawei.com ([169.254.5.134]) by NKGEML413-HUB.china.huawei.com ([10.98.56.74]) with mapi id 14.03.0415.000; Tue, 25 Jun 2019 11:19:18 +0800 From: Tianran Zhou To: Greg Mirsky CC: IETF IPPM WG , "draft-mirsky-ippm-stamp-option-tlv@ietf.org" Thread-Topic: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv Thread-Index: AQHVJzbIPNuLaD81EkmxWIGmMvnQLqaqhWLw///tkoCAATyGkA== Date: Tue, 25 Jun 2019 03:19:18 +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] 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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 iv46pZ6_vJLa; Tue, 25 Jun 2019 14:48:22 -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 1EEE312001B; Tue, 25 Jun 2019 14:48:22 -0700 (PDT) Received: by mail-lf1-x135.google.com with SMTP id p24so81764lfo.6; Tue, 25 Jun 2019 14:48:22 -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 :cc; bh=lFIfdJfhvDBVgkTBDPnvNwMiaUv+BEvT0Rh29+EgerA=; b=JIKUi6z69jRLVpX2jeh88GG5auixHqTYnTUeomNDpd2Lsa8GEHMtO4K2bZveixDdM+ 1qWkESrQMRw++N0PLv3YT4Iu0M4YeIMAZzpPqmxyNVc1wJkO9O0m0QiMGYYOWSD19FNy DDuWq7PUo1V1Fe8L2cTDh6gJf3NYnS4+lgljAt0k0aUVY+FvRxoZnlK6e913LmNNgB8b 328Nk8U2NudqTE5n2zjiw4On9OkWI+E1TGleMz6BHSbN5z1gjMWLDhfvRCih1QQtYe0o ynq92QAQtN68V9ABFDhwkCZbY6sMf5i9GL1HQVlKuTYw6vaSQUe1hvQCjyPfYm4ZNz9P clag== 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=lFIfdJfhvDBVgkTBDPnvNwMiaUv+BEvT0Rh29+EgerA=; b=FglIAag6fqVQFc3d0Vy8vFGqD34yhiQ+/RPilVEbHoZeXgJkR87sfuag+GmZkQ48OZ zibq4BMxayaoEmRfQqGsVnFIz8kO5yWZ4FW/85iQaTEaIxi4Gw1CfE4btRAemRFg3lxZ KCte/1XbTtl5llU1Q+FL9eT4tzaQBth1ZkNzJJl2Rj81H5fhPag3l85PxHpW8zXzqvDn MsaW//+QJFNmz8N3YeauUSBrzBf4mkRxeMk8sP6ITrDHfOjHPJX0nBDftwaT0ImC6i9c nId+6ItRQkye/JxJ/QtTQ26ct23u5W4gJdBfiZIMwv0OvKalLmGU5cjZL9Ui+zTcgNc1 nJGw== X-Gm-Message-State: APjAAAXZGtsNiiqpBTVOLGVg0L4Q9k/wnevgFqoXqUfwylJm54NPxesF jcNqQWucmtIrM+4FoV/dzV/HVmSvmyYdyT1v1SpZAjHusns= X-Google-Smtp-Source: APXvYqzlhhOk4lVN74L+6rF2UoTN9y2h6h/UdR4cP0k/dWAF90/cTOd593MHfNuOtW1Zj5iIdgeIteu0amS7sQsutVU= X-Received: by 2002:a05:6512:24a:: with SMTP id b10mr543293lfo.37.1561499300156; Tue, 25 Jun 2019 14:48:20 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Tue, 25 Jun 2019 14:48:07 -0700 Message-ID: To: Tianran Zhou Cc: IETF IPPM WG , "draft-mirsky-ippm-stamp-option-tlv@ietf.org" Content-Type: multipart/alternative; boundary="0000000000001a5bb4058c2ce3a1" Archived-At: Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv 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, 25 Jun 2019 21:48:26 -0000 --0000000000001a5bb4058c2ce3a1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Tianran, many thanks for further clarifications. Please find my answers below in-lined tagged GIM2>>. Regards, Greg On Mon, Jun 24, 2019 at 8:19 PM Tianran Zhou wrote= : > Hi Greg=EF=BC=8C > > > > Thanks for your reply. Please see inline. > > > > Tianran > > > > *From:* Greg Mirsky [mailto:gregimirsky@gmail.com] > *Sent:* Monday, June 24, 2019 11:45 PM > *To:* Tianran Zhou > *Cc:* IETF IPPM WG ; > draft-mirsky-ippm-stamp-option-tlv@ietf.org > *Subject:* Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv > > > > Hi Tianran, > > thank you for your interest in the proposal on the optional extensions of > STAMP. Please find my answers in-line below tagged GIM>>. > > > > Regards, > > Greg > > > > On Mon, Jun 24, 2019 at 1:59 AM Tianran Zhou > wrote: > > Hi Greg, > > > > Several clarification questions after reading this draft. > > > > 1. Maybe wrt to section 4. Could you please explicitly describe the > mechanism to detect the existence of TLVs, in addition to the fixed messa= ge > part? > > GIM>> Since the length of the base STAMP packet, and the mode, > unauthenticated or authenticated, are known, the receiver of a STAMP pack= et > can determine if there are any TLV by comparing the length of the base > STAMP packet with the value of the Total length field of IP header. > > > > [ztr]. OK. So=EF=BC=8CSTAMP is IP based protocol? Or it=E2=80=99s udp bas= ed, so need to > use the length in UDP header? > > Anyway, it=E2=80=99s better to describe this information because from fig= ure 1, > people cannot deduce it. > GIM>> Yes, you're correct, thank you. STAMP uses UDP and thus the length of both IP and UDP headers must be included in the calculation. Hope the new text clarifies the process: NEW TEXT: A STAMP node, whether Session-Sender or Session-Reflector, receiving a test packet MUST determine whether the packet is a base STAMP packet or includes one or more TLVs. The node MUST compare the value in the Total Length field of the IP header and the length of the base STAMP test packet in the mode, unauthenticated or authenticated based on the configuration of the particular STAMP test session. If the difference between the two values is larger than the length of IP and UDP headers, then the test packet includes one or more STAMP TLVs that immediately follow the base STAMP test packet. > > > 2. Could you please describe the use case for each TLV you proposed? > Especially the =E2=80=9CLocation TLV=E2=80=9D and the =E2=80=9CClass of S= ervice TLV=E2=80=9D. I can > hardly understand why these two are useful, and how to use them to do > measurement/collection. > > GIM>> We'll expand the informational text for TLVs. For the Location TLV, > the use is described in the draft as follows: > > > The Location TLV MAY be used to determine the last-hop addressing for > STAMP packets including source and destination IP addresses as well > as the MAC address of the last-hop router. Last-hop MAC address MAY > be monitored by the Session-Sender whether there has been a path > switch on the last hop, closest to the Session-Reflector. The IP > addresses and UDP port will indicate if there is a NAT router on the > path, and allows the Session-Sender to identify the IP address of the > Session-Reflector behind the NAT, detect changes in the NAT mapping > that could cause sending the STAMP packets to the wrong Session- > Reflector. > > > > [ztr]: 1. My understanding on this paragraph is the location tlv actually > includes two separate functions. One is to collect the last-hop MAC. The > other is to collect the IP and port. > > It seems they have very different use. Then why not split it into two > TLVs? I cannot see the use case of the combination of the two parts. > GIM>> I agree that there could be practical reasons to have two TLVs. I hope other experts in the IPPM WG will share their opinions. > 2. It=E2=80=99s still not clear to me why we need to know =E2=80=9Cwhethe= r there has been > a path switch on the last hop=E2=80=9D. How to know this based on the sou= rce MAC? > Who=E2=80=99s source MAC? I cannot guess on the too simple description. > GIM>> Will add a use case into the future version. > 3. ipv4 and ipv6 address have different length. How do I know it=E2=80=99= s an > ipv4 or ipv6 address? > GIM>> The value of the Length field may be used as the indicator of which address family being used. > 4. I want to see more text on how to use IP+port to detect the NAT > mapping. What=E2=80=99s the issue? > GIM>> Same as for the use of MAC. Will add a use case into the future version. > > > > > The use case of the Class of Service TLV is the same as of RFC 7750 > and > draft-bailmir-ippm-twamp-dscp-ctrl-mon > > . > > > > [ztr]: Specifically, who generate the dscp1,dscp2 and ecn? based on what? > GIM2>> The explanation of the Class of Service TLV suggests that: o DSCP1 - The Differentiated Services Code Point (DSCP) intended by the Session-Sender. To be used as the return DSCP from the Session-Reflector. o DSCP2 - The received value in the DSCP field at the Session- Reflector in the forward direction. A new text to be added in the next update: NEW TEXT: A STAMP Session-Sender that includes the Class of Service TLV sets the value of the DSCP1 field and zeroes the value of the DSCP2 field. A STAMP Session-Reflector that received the test packet with the Class of Service TLV MUST include the Class of Service TLV in the reflected test packet. Also, the Session-Sender MUST copy the value of the DSCP field of the IP header of the received STAMP test packet and copy it into the DSCP2 field of the reflected test packet. And, at last, the Session-Reflector MUST set the value of the DSCP field in the IP header of the reflected test packet equal to the value of the DSCP1 field of the test packet it received. Does it make the intent and handling of the Class of Service TLV clearer? > > > Thanks, > > Tianran > > > > *From:* ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Greg Mirsky > *Sent:* Thursday, June 20, 2019 3:06 PM > *To:* IPPM Chairs ; IETF IPPM WG > *Cc:* draft-mirsky-ippm-stamp-option-tlv@ietf.org > *Subject:* [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv > > > > Dear Chairs, et al., > > authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable > and detailed enough to ask for your consideration to start the WG Adoptio= n > Poll. > > > > Regards, > > Greg > > --0000000000001a5bb4058c2ce3a1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Tianran,
many thanks for further c= larifications. Please find my answers below in-lined tagged GIM2>>.

Regards,
Greg

On Mon, Jun 24, 2019= at 8:19 PM Tianran Zhou <zhou= tianran@huawei.com> wrote:

Hi Greg=EF=BC=8C

=C2=A0

Thanks for your re= ply. Please see inline.

=C2=A0

Tianran<= /u>

=C2=A0

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Monday, June 24, 2019 11:45 PM
To: Tianran Zhou <zhoutianran@huawei.com>
Cc: IETF IPPM WG <ippm@ietf.org>; draft-mirsky-ippm-stamp-option-tlv@ietf.or= g
Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tl= v

=C2=A0

Hi Tianran,

thank you for your interest in = the proposal on the optional extensions of STAMP. Please find my answers in= -line below tagged GIM>>.

=C2=A0

Regards,

Greg

=C2=A0

On Mon, Jun 24, 2019 at 1:59 AM= Tianran Zhou <zhoutianran@huawei.com> wrote:

Hi Greg,

=C2=A0

Several clarificat= ion questions after reading this draft.<= u>

=C2=A0

1. Maybe wrt to se= ction 4. Could you please explicitly describe the mechanism to detect the e= xistence of TLVs, in addition to the fixed message part?

GIM>> Since the length of= the base STAMP packet, and the mode, unauthenticated or authenticated, are= known, the receiver of a STAMP packet can determine if there are any TLV b= y comparing the length of the base STAMP packet with the value of the Total length field of IP header.=C2=A0=

=C2=A0

[ztr]. OK. So=EF=BC=8CSTAMP is IP based protoc= ol? Or it=E2=80=99s udp based, so need to use the length in UDP header?

Anyway, it<= span lang=3D"EN-US" style=3D"font-size:10.5pt;color:rgb(31,73,125)">=E2=80= =99s better to describe this information because from figure 1, people cannot deduce i= t.

GIM>&= gt; Yes, you're correct, thank you. STAMP uses UDP and thus the length = of both IP and UDP headers must be included in the calculation. Hope the ne= w text clarifies the process:
NEW TEXT:
=C2=A0 =C2=A0A STAMP= node, whether Session-Sender or Session-Reflector, receiving
=C2=A0 =C2= =A0a test packet MUST determine whether the packet is a base STAMP
=C2= =A0 =C2=A0packet or includes one or more TLVs.=C2=A0 The node MUST compare = the value
=C2=A0 =C2=A0in the Total Length field of the IP header and th= e length of the base
=C2=A0 =C2=A0STAMP test packet in the mode, unauthe= nticated or authenticated based
=C2=A0 =C2=A0on the configuration of the= particular STAMP test session.=C2=A0 If the
=C2=A0 =C2=A0difference bet= ween the two values is larger than the length of IP and
=C2=A0 =C2=A0UDP= headers, then the test packet includes one or more STAMP TLVs
=C2= =A0 =C2=A0that immediately follow the base STAMP test packet.=C2=A0

=C2=A0

2. Could you pleas= e describe the use case for each TLV you proposed? Especially the =E2=80=9CLocation TLV=E2=80=9D and the =E2=80=9CClass of Servic= e TLV=E2=80=9D. I can hardly understand why these two are useful, and how to use them to d= o measurement/collection.<= /p>

GIM>> We'll expand th= e informational text for TLVs. For the Location TLV, the use is described i= n the draft as follows:


=C2=A0 =C2=A0The Location TLV MAY be used to determine the last-hop address= ing for
=C2=A0 =C2=A0STAMP packets including source and destination IP addresses as= well
=C2=A0 =C2=A0as the MAC address of the last-hop router.=C2=A0 Last-hop MAC = address MAY
=C2=A0 =C2=A0be monitored by the Session-Sender whether there has been a pa= th
=C2=A0 =C2=A0switch on the last hop, closest to the Session-Reflector.=C2= =A0 The IP
=C2=A0 =C2=A0addresses and UDP port will indicate if there is a NAT router = on the
=C2=A0 =C2=A0path, and allows the Session-Sender to identify the IP address= of the
=C2=A0 =C2=A0Session-Reflector behind the NAT, detect changes in the NAT ma= pping
=C2=A0 =C2=A0that could cause sending the STAMP packets to the wrong Sessio= n-
=C2=A0 =C2=A0Reflector.

= =C2=A0

[ztr]: 1. My under= standing on this paragraph is the location tlv actually includes two separa= te functions. One is to collect the last-hop MAC. The other is to collect the IP and port.

It seems they have= very different use. Then why not split it into two TLVs? I cannot see the = use case of the combination of the two parts.

<= /div>
GIM>> I agree that there could be = practical reasons to have two TLVs. I hope other experts in the IPPM WG wil= l share their opinions.=C2=A0

2. It=E2=80=99s still not clear to me why we need to know =E2=80=9Cwhether there has been a path switch on the last hop=E2=80=9D. How to know this based on the source MAC? Who=E2=80=99s source MAC? I cannot guess on the too simple de= scription.

= GIM>> Will add a use case into the future version.=C2=A0

3. ipv4 and ipv6 a= ddress have different length. How do I know it=E2=80=99s an ipv4 or ipv6 address?

GIM>> The value of the Length field may be used as the= indicator of which address family being used.=C2=A0

4. I want to see m= ore text on how to use IP+port to detect the NAT mapping. What=E2=80=99s the issue?

GIM>> Same as for the use of MAC. Will add a use case into the futur= e version.=C2=A0=C2=A0

=C2=A0

=C2=A0

The use case of the Class of Se= rvice TLV is the same as of RFC= 7750=C2=A0and=C2=A0draft-bailmir-ippm= -twamp-dscp-ctrl-mon.

=C2=A0

[ztr]: Specificall= y, who generate the dscp1,dscp2 and ecn? based on what?

GIM2>> The explanation o= f the Class of Service TLV suggests that:
=C2=A0 =C2=A0 o =C2=A0D= SCP1 - The Differentiated Services Code Point (DSCP) intended by
=C2= =A0 =C2=A0 =C2=A0 the Session-Sender.=C2=A0 To be used as the return DSCP f= rom the
=C2=A0 =C2=A0 =C2=A0 Session-Reflector.

=C2=A0 =C2=A0o = =C2=A0DSCP2 - The received value in the DSCP field at the Session-
=C2= =A0 =C2=A0 =C2=A0 Reflector in the forward direction.
A new text to be added in the next update:
NEW TEXT:
=C2=A0 =C2=A0A STAMP S= ession-Sender that includes the Class of Service TLV sets
=C2=A0 =C2=A0t= he value of the DSCP1 field and zeroes the value of the DSCP2 field.
=C2= =A0 =C2=A0A STAMP Session-Reflector that received the test packet with the<= br>=C2=A0 =C2=A0Class of Service TLV MUST include the Class of Service TLV = in the
=C2=A0 =C2=A0reflected test packet.=C2=A0 Also, the Session-Sende= r MUST copy the value
=C2=A0 =C2=A0of the DSCP field of the IP header of= the received STAMP test packet
=C2=A0 =C2=A0and copy it into the DSCP2 = field of the reflected test packet.=C2=A0 And,
=C2=A0 =C2=A0at last, the= Session-Reflector MUST set the value of the DSCP field
=C2=A0 =C2=A0in = the IP header of the reflected test packet equal to the value of
=C2=A0 = =C2=A0the DSCP1 field of the test packet it received.

Does it make the intent and= handling of the Class of Service TLV clearer?

=C2=A0

Thanks,

Tianran

=C2=A0

From: ippm [mailto:ippm-bo= unces@ietf.org] On Behalf Of Greg Mirsky
Sent: Thursday, June 20, 2019 3:06 PM
To: IPPM Chairs <ippm-chairs@ietf.org>; IETF IPPM WG <ippm@ietf.org>
Cc: draft-mirsky-ippm-stamp-option-tlv@ietf.org
Subject: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv

=C2=A0

Dear Chairs, et al.,<= /u>

authors of draft-mirsky-ippm-st= amp-option-tlv believe that it is stable and detailed enough to ask for you= r consideration to start the WG Adoption Poll.

=C2=A0

Regards,

Greg

--0000000000001a5bb4058c2ce3a1-- From nobody Tue Jun 25 20:21:23 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 31A3C120608; Tue, 25 Jun 2019 20:21:22 -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_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 n21glRtnyUxf; Tue, 25 Jun 2019 20:21:20 -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 EAE7D120122; Tue, 25 Jun 2019 20:21:19 -0700 (PDT) Received: from lhreml709-cah.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 91F2BD44D63C170A9D56; Wed, 26 Jun 2019 04:21:17 +0100 (IST) Received: from NKGEML412-HUB.china.huawei.com (10.98.56.73) by lhreml709-cah.china.huawei.com (10.201.108.32) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 26 Jun 2019 04:21:17 +0100 Received: from NKGEML515-MBS.china.huawei.com ([169.254.5.134]) by nkgeml412-hub.china.huawei.com ([10.98.56.73]) with mapi id 14.03.0415.000; Wed, 26 Jun 2019 11:21:09 +0800 From: Tianran Zhou To: IETF IPPM WG CC: "draft-zhou-ippm-ioam-yang.authors@ietf.org" Thread-Topic: New Version Notification for draft-zhou-ippm-ioam-yang-04.txt Thread-Index: AQHVK81l//eBsCjuT0qEiIg2dDf21KatQ4+w Date: Wed, 26 Jun 2019 03:21:09 +0000 Message-ID: References: <156151891907.31137.10239602698656405934.idtracker@ietfa.amsl.com> In-Reply-To: <156151891907.31137.10239602698656405934.idtracker@ietfa.amsl.com> Accept-Language: zh-CN, en-US 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ZWFzZSBub3RlIHRoYXQgaXQgbWF5IHRha2UgYSBjb3VwbGUgb2YgbWludXRlcyBmcm9tIHRoZSB0 aW1lIG9mIHN1Ym1pc3Npb24gdW50aWwgdGhlIGh0bWxpemVkIHZlcnNpb24gYW5kIGRpZmYgYXJl IGF2YWlsYWJsZSBhdCB0b29scy5pZXRmLm9yZy4NCg0KVGhlIElFVEYgU2VjcmV0YXJpYXQNCg0K From nobody Tue Jun 25 21:23:17 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 7D3E9120608; Tue, 25 Jun 2019 21:23:14 -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=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 badqQL1SA5-o; Tue, 25 Jun 2019 21:23:11 -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 4B707120222; Tue, 25 Jun 2019 21:23:11 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 14109DD3CDBE26F4FC7A; Wed, 26 Jun 2019 05:23:09 +0100 (IST) Received: from NKGEML413-HUB.china.huawei.com (10.98.56.74) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 26 Jun 2019 05:23:08 +0100 Received: from NKGEML515-MBS.china.huawei.com ([169.254.5.134]) by NKGEML413-HUB.china.huawei.com ([10.98.56.74]) with mapi id 14.03.0415.000; Wed, 26 Jun 2019 12:22:44 +0800 From: Tianran Zhou To: Greg Mirsky CC: IETF IPPM WG , "draft-mirsky-ippm-stamp-option-tlv@ietf.org" Thread-Topic: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv Thread-Index: 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14:42:30 -0700 (PDT) Received: by mail-lf1-x130.google.com with SMTP id y198so144014lfa.1; Wed, 26 Jun 2019 14:42:30 -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=yCKgPf00vXnuP+LrAsik8gNXluJcT5aBYwwYuwJ/hh4=; b=adJ8kb13XEUz30NQggRpK4zCZiXOKOoI9NHye0cKw99nlZ1daSmCv8uiGfBQjomtpN D9oHC6IDAfSFmDaAIVJt5t8xywP+TvUKxfP/ypEuyVU5udGcdsQPsZvfyNahZoFibpAl oAKZc42sfhOuxdcn0JMoPblkjHSfpjmvagVPXmfDKyMElaV8AWOoNhkCpyOX9XylRjCr Ft2c+Tg2csZ8EBEMheEiHA1gL+K+MtaxrrNrkTxKH2W+dP8hscQdy1rc4sWQSxxt67mP C8ngdMOFpVkLQn16EssSH4BoTvuA9oLaMK1meXD4ktlh7c66f3u/L6eHrtex0XxHj3Ui 8lYg== 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=yCKgPf00vXnuP+LrAsik8gNXluJcT5aBYwwYuwJ/hh4=; b=ooC2VkOT1GtxO5QDCRcGTHF4GOde6Selmhph2fmkYSbew25s1IsQIJdaS1rrbzkpKE 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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, 26 Jun 2019 21:42:35 -0000 --000000000000f8b4f4058c40ebf3 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Tianran, thank you for the great discussion. Please find my responses in-line tagged GIM3>>. Regards, Greg On Tue, Jun 25, 2019 at 9:23 PM Tianran Zhou wrote= : > Hi Greg, > > > > Thank you very much for your clarification and taking my suggestions. Loo= k > forward to your revision. > > Let=E2=80=99s work on this text: > > NEW TEXT: > > A STAMP Session-Sender that includes the Class of Service TLV sets > the value of the DSCP1 field and zeroes the value of the DSCP2 field. > A STAMP Session-Reflector that received the test packet with the > Class of Service TLV MUST include the Class of Service TLV in the > reflected test packet. Also, the Session-Sender MUST copy the value > of the DSCP field of the IP header of the received STAMP test packet > and copy it into the DSCP2 field of the reflected test packet. And, > at last, the Session-Reflector MUST set the value of the DSCP field > in the IP header of the reflected test packet equal to the value of > the DSCP1 field of the test packet it received. > > > > 1. =E2=80=9CAlso, the Session-Sender MUST copy the value of the DSCP fiel= d of the > IP header of the received STAMP test packet and copy it into the DSCP2 > field of the reflected test packet.=E2=80=9D > > > > Please make sure it=E2=80=99s session-reflector not session-sender. Corre= ct? > GIM3>> Great catch, thank you! > > > 2. My understanding dscp1 is used for the session-sender to notify the > session-reflector to use the dscp1 for the reflect message transport. If > so, why not just use the configuration(i.e., YANG)? > GIM3>> CoS re-mapping testing, in our view, does not require the use of many test packets in the session. In fact, to test CoS may require changing the DSCP value in the IP header and of DSCP1 in CoS TLV for each test packet transmitted by the Session-Sender. > Dscp2 is used for the session-reflector to notify the session-sender the > receive packet dscp value. Why the sender need to know this, as the sende= r > should have known this? To check if the path changed the DSCP? > GIM3>> You're right, DSCP2 returns the value of the DSCP field as received by the Session-Reflector. Re-mapping of CoS in some use cases, for example in mobile backhaul networks, is used technique to provide multiple services, i.e. 2G, 3G, LTE, over the same network. But if it is misconfigured, then it often difficult to diagnose the root cause of the problem that is viewed as an excessive packet drop of higher level service while packet drop for lower service packets is at a normal level. > > > Thanks, > > Tianran > > > > *From:* Greg Mirsky [mailto:gregimirsky@gmail.com] > *Sent:* Wednesday, June 26, 2019 5:48 AM > *To:* Tianran Zhou > *Cc:* IETF IPPM WG ; > draft-mirsky-ippm-stamp-option-tlv@ietf.org > *Subject:* Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv > > > > Hi Tianran, > > many thanks for further clarifications. Please find my answers below > in-lined tagged GIM2>>. > > > > Regards, > > Greg > > > > On Mon, Jun 24, 2019 at 8:19 PM Tianran Zhou > wrote: > > Hi Greg=EF=BC=8C > > > > Thanks for your reply. Please see inline. > > > > Tianran > > > > *From:* Greg Mirsky [mailto:gregimirsky@gmail.com] > *Sent:* Monday, June 24, 2019 11:45 PM > *To:* Tianran Zhou > *Cc:* IETF IPPM WG ; > draft-mirsky-ippm-stamp-option-tlv@ietf.org > *Subject:* Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv > > > > Hi Tianran, > > thank you for your interest in the proposal on the optional extensions of > STAMP. Please find my answers in-line below tagged GIM>>. > > > > Regards, > > Greg > > > > On Mon, Jun 24, 2019 at 1:59 AM Tianran Zhou > wrote: > > Hi Greg, > > > > Several clarification questions after reading this draft. > > > > 1. Maybe wrt to section 4. Could you please explicitly describe the > mechanism to detect the existence of TLVs, in addition to the fixed messa= ge > part? > > GIM>> Since the length of the base STAMP packet, and the mode, > unauthenticated or authenticated, are known, the receiver of a STAMP pack= et > can determine if there are any TLV by comparing the length of the base > STAMP packet with the value of the Total length field of IP header. > > > > [ztr]. OK. So=EF=BC=8CSTAMP is IP based protocol? Or it=E2=80=99s udp bas= ed, so need to > use the length in UDP header? > > Anyway, it=E2=80=99s better to describe this information because from fig= ure 1, > people cannot deduce it. > > GIM>> Yes, you're correct, thank you. STAMP uses UDP and thus the length > of both IP and UDP headers must be included in the calculation. Hope the > new text clarifies the process: > > NEW TEXT: > > A STAMP node, whether Session-Sender or Session-Reflector, receiving > a test packet MUST determine whether the packet is a base STAMP > packet or includes one or more TLVs. The node MUST compare the value > in the Total Length field of the IP header and the length of the base > STAMP test packet in the mode, unauthenticated or authenticated based > on the configuration of the particular STAMP test session. If the > difference between the two values is larger than the length of IP and > UDP headers, then the test packet includes one or more STAMP TLVs > > that immediately follow the base STAMP test packet. > > > > 2. Could you please describe the use case for each TLV you proposed? > Especially the =E2=80=9CLocation TLV=E2=80=9D and the =E2=80=9CClass of S= ervice TLV=E2=80=9D. I can > hardly understand why these two are useful, and how to use them to do > measurement/collection. > > GIM>> We'll expand the informational text for TLVs. For the Location TLV, > the use is described in the draft as follows: > > > The Location TLV MAY be used to determine the last-hop addressing for > STAMP packets including source and destination IP addresses as well > as the MAC address of the last-hop router. Last-hop MAC address MAY > be monitored by the Session-Sender whether there has been a path > switch on the last hop, closest to the Session-Reflector. The IP > addresses and UDP port will indicate if there is a NAT router on the > path, and allows the Session-Sender to identify the IP address of the > Session-Reflector behind the NAT, detect changes in the NAT mapping > that could cause sending the STAMP packets to the wrong Session- > Reflector. > > > > [ztr]: 1. My understanding on this paragraph is the location tlv actually > includes two separate functions. One is to collect the last-hop MAC. The > other is to collect the IP and port. > > It seems they have very different use. Then why not split it into two > TLVs? I cannot see the use case of the combination of the two parts. > > GIM>> I agree that there could be practical reasons to have two TLVs. I > hope other experts in the IPPM WG will share their opinions. > > 2. It=E2=80=99s still not clear to me why we need to know =E2=80=9Cwhethe= r there has been > a path switch on the last hop=E2=80=9D. How to know this based on the sou= rce MAC? > Who=E2=80=99s source MAC? I cannot guess on the too simple description. > > GIM>> Will add a use case into the future version. > > 3. ipv4 and ipv6 address have different length. How do I know it=E2=80=99= s an > ipv4 or ipv6 address? > > GIM>> The value of the Length field may be used as the indicator of which > address family being used. > > 4. I want to see more text on how to use IP+port to detect the NAT > mapping. What=E2=80=99s the issue? > > GIM>> Same as for the use of MAC. Will add a use case into the future > version. > > > > > > The use case of the Class of Service TLV is the same as of RFC 7750 > and > draft-bailmir-ippm-twamp-dscp-ctrl-mon > > . > > > > [ztr]: Specifically, who generate the dscp1,dscp2 and ecn? based on what? > > GIM2>> The explanation of the Class of Service TLV suggests that: > > o DSCP1 - The Differentiated Services Code Point (DSCP) intended by > > the Session-Sender. To be used as the return DSCP from the > Session-Reflector. > > o DSCP2 - The received value in the DSCP field at the Session- > Reflector in the forward direction. > > A new text to be added in the next update: > > NEW TEXT: > > A STAMP Session-Sender that includes the Class of Service TLV sets > the value of the DSCP1 field and zeroes the value of the DSCP2 field. > A STAMP Session-Reflector that received the test packet with the > Class of Service TLV MUST include the Class of Service TLV in the > reflected test packet. Also, the Session-Sender MUST copy the value > of the DSCP field of the IP header of the received STAMP test packet > and copy it into the DSCP2 field of the reflected test packet. And, > at last, the Session-Reflector MUST set the value of the DSCP field > in the IP header of the reflected test packet equal to the value of > the DSCP1 field of the test packet it received. > > > > Does it make the intent and handling of the Class of Service TLV clearer? > > > > Thanks, > > Tianran > > > > *From:* ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Greg Mirsky > *Sent:* Thursday, June 20, 2019 3:06 PM > *To:* IPPM Chairs ; IETF IPPM WG > *Cc:* draft-mirsky-ippm-stamp-option-tlv@ietf.org > *Subject:* [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv > > > > Dear Chairs, et al., > > authors of draft-mirsky-ippm-stamp-option-tlv believe that it is stable > and detailed enough to ask for your consideration to start the WG Adoptio= n > Poll. > > > > Regards, > > Greg > > --000000000000f8b4f4058c40ebf3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Tianran,
thank you for the great d= iscussion. Please find my responses in-line tagged GIM3>>.
=
Regards,
Greg

On Tue, Jun 25, 2019 at 9:23 PM= Tianran Zhou <zhoutianran@hua= wei.com> wrote:

Hi Greg,=

=C2=A0

Thank you very muc= h for your clarification and taking my suggestions. Look forward to your re= vision.

Let=E2=80=99s work on this text:

NEW TEXT:<= /p>

=C2=A0 =C2=A0A STAMP Session-Se= nder that includes the Class of Service TLV sets
=C2=A0 =C2=A0the value of the DSCP1 field and zeroes the value of the DSCP2= field.
=C2=A0 =C2=A0A STAMP Session-Reflector that received the test packet with t= he
=C2=A0 =C2=A0Class of Service TLV MUST include the Class of Service TLV in = the
=C2=A0 =C2=A0reflected test packet.=C2=A0 Also, the Session-Sender MUST cop= y the value
=C2=A0 =C2=A0of the DSCP field of the IP header of the received STAMP test = packet
=C2=A0 =C2=A0and copy it into the DSCP2 field of the reflected test packet.= =C2=A0 And,
=C2=A0 =C2=A0at last, the Session-Reflector MUST set the value of the DSCP = field
=C2=A0 =C2=A0in the IP header of the reflected test packet equal to the val= ue of
=C2=A0 =C2=A0the DSCP1 field of the test packet it received.<= /span>

=C2=A0

1. =E2=80=9CAlso, the Session-Sender MUST copy th= e value of the DSCP field of the IP header of the received STAMP test packe= t and copy it into the DSCP2 field of the reflected test packet.=E2=80=9D

=C2=A0

Please make sure i= t=E2=80=99s session-reflector not session-sender. Correct?

GIM3>> Great catch, thank you!=C2=A0

=C2=A0

2. My understandin= g dscp1 is used for the session-sender to notify the session-reflector to u= se the dscp1 for the reflect message transport. If so, why not just use the configuration(i.e., YANG)?

GIM= 3>> CoS re-mapping testing, in our view, does not require the use of = many test packets in the session. In fact, to test CoS may require changing= the DSCP value in the IP header and of DSCP1 in CoS TLV for each test pack= et transmitted by the Session-Sender.

Dscp2 is used for = the session-reflector to notify the session-sender the receive packet dscp = value. Why the sender need to know this, as the sender should have known this? To check if the path changed the DSCP?

GIM3>> You're right, DSCP2 returns the value of the DS= CP field as received by the Session-Reflector. Re-mapping of CoS in some us= e cases, for example in mobile backhaul networks, is used technique to prov= ide multiple services, i.e. 2G, 3G, LTE, over the same network. But if it i= s misconfigured, then it often difficult to diagnose the root cause of the = problem that is viewed as an excessive packet drop of higher level service = while packet drop for lower service packets is at a normal level.

=C2=A0

Thanks,<= /u>

Tianran<= /u>

=C2=A0

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Wednesday, June 26, 2019 5:48 AM
To: Tianran Zhou <zhoutianran@huawei.com>
Cc: IETF IPPM WG <ippm@ietf.org>; draft-mirsky-ippm-stamp-option-tlv@ietf.or= g
Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tl= v

=C2=A0

Hi Tianran,

many thanks for further clarifi= cations. Please find my answers below in-lined tagged GIM2>>.<= u>

=C2=A0

Regards,

Greg

=C2=A0

On Mon, Jun 24, 2019 at 8:19 PM= Tianran Zhou <zhoutianran@huawei.com> wrote:

Hi Greg=EF=BC=8C

=C2=A0

Thanks for your re= ply. Please see inline.

=C2=A0

Tianran

=C2=A0

From: Greg Mirsky [mailto:= gregimirsky@gmail.com]
Sent: Monday, June 24, 2019 11:45 PM
To: Tianran Zhou <zhoutianran@huawei.com>
Cc: IETF IPPM WG <ippm@ietf.org>; draft-mirsky-ippm-stamp-option-tlv@ietf.org
Subject: Re: [ippm] On progressing draft-mirsky-ippm-stamp-option-tl= v

=C2=A0

Hi Tianran,

thank you for your interest in = the proposal on the optional extensions of STAMP. Please find my answers in= -line below tagged GIM>>.

=C2=A0

Regards,

Greg

=C2=A0

On Mon, Jun 24, 2019 at 1:59 AM= Tianran Zhou <zhoutianran@huawei.com> wrote:

Hi Greg,

=C2=A0

Several clarificat= ion questions after reading this draft.<= u>

=C2=A0

1. Maybe wrt to se= ction 4. Could you please explicitly describe the mechanism to detect the e= xistence of TLVs, in addition to the fixed message part?

GIM>> Since the length of= the base STAMP packet, and the mode, unauthenticated or authenticated, are= known, the receiver of a STAMP packet can determine if there are any TLV by comparing the length of the base STAMP packet with the valu= e of the Total length field of IP header.=C2=A0

=C2=A0

[ztr]. OK. So=EF=BC=8CSTAMP is IP based protocol? Or it=E2=80=99s udp based, so need to use the length in UDP header?

Anyway, it<= span lang=3D"EN-US" style=3D"font-size:10.5pt;color:rgb(31,73,125)">=E2=80= =99s better to describe this information because from figure 1, people cannot d= educe it.

GIM>> Yes, you're cor= rect, thank you. STAMP uses UDP and thus the length of both IP and UDP head= ers must be included in the calculation. Hope the new text clarifies the pr= ocess:

NEW TEXT:<= /p>

=C2=A0 =C2=A0A STAMP node, whet= her Session-Sender or Session-Reflector, receiving
=C2=A0 =C2=A0a test packet MUST determine whether the packet is a base STAM= P
=C2=A0 =C2=A0packet or includes one or more TLVs.=C2=A0 The node MUST compa= re the value
=C2=A0 =C2=A0in the Total Length field of the IP header and the length of t= he base
=C2=A0 =C2=A0STAMP test packet in the mode, unauthenticated or authenticate= d based
=C2=A0 =C2=A0on the configuration of the particular STAMP test session.=C2= =A0 If the
=C2=A0 =C2=A0difference between the two values is larger than the length of= IP and
=C2=A0 =C2=A0UDP headers, then the test packet includes one or more STAMP T= LVs

=C2=A0 =C2=A0that immediately f= ollow the base STAMP test packet.=C2=A0

=C2=A0

2. Could you pleas= e describe the use case for each TLV you proposed? Especially the =E2=80=9CLocation TLV=E2=80=9D and the =E2=80=9CClass of Servic= e TLV=E2=80=9D. I can hardly understand why these two are useful, and how to use them to d= o measurement/collection.<= /p>

GIM>> We'll expand th= e informational text for TLVs. For the Location TLV, the use is described i= n the draft as follows:


=C2=A0 =C2=A0The Location TLV MAY be used to determine the last-hop address= ing for
=C2=A0 =C2=A0STAMP packets including source and destination IP addresses as= well
=C2=A0 =C2=A0as the MAC address of the last-hop router.=C2=A0 Last-hop MAC = address MAY
=C2=A0 =C2=A0be monitored by the Session-Sender whether there has been a pa= th
=C2=A0 =C2=A0switch on the last hop, closest to the Session-Reflector.=C2= =A0 The IP
=C2=A0 =C2=A0addresses and UDP port will indicate if there is a NAT router = on the
=C2=A0 =C2=A0path, and allows the Session-Sender to identify the IP address= of the
=C2=A0 =C2=A0Session-Reflector behind the NAT, detect changes in the NAT ma= pping
=C2=A0 =C2=A0that could cause sending the STAMP packets to the wrong Sessio= n-
=C2=A0 =C2=A0Reflector.

= =C2=A0

[ztr]: 1. My under= standing on this paragraph is the location tlv actually includes two separa= te functions. One is to collect the last-hop MAC. The other is to collect the IP and por= t.

It seems they have= very different use. Then why not split it into two TLVs? I cannot see the = use case of the combination of the two parts.

GIM>> I agree that there = could be practical reasons to have two TLVs. I hope other experts in the IP= PM WG will share their opinions.=C2=A0

2. It=E2=80=99s still not clear to me why we need to know =E2=80=9Cwhether there has been a path switch on the last hop=E2= =80=9D. How to know this based on the source MAC? Who=E2=80=99s source MAC? I cannot guess on the too simple de= scription.

GIM>> Will add a use case= into the future version.=C2=A0

3. ipv4 and ipv6 a= ddress have different length. How do I know it=E2=80=99s an ipv4 or ipv6 address?<= /p>

GIM>> The value of the Le= ngth field may be used as the indicator of which address family being used.= =C2=A0

4. I want to see m= ore text on how to use IP+port to detect the NAT mapping. What=E2=80=99s the issue?

GIM>> Same as for the use= of MAC. Will add a use case into the future version.=C2=A0=C2=A0=

=C2=A0

=C2=A0

The use case of the Class of Se= rvice TLV is the same as of RFC= 7750=C2=A0and=C2=A0draft-bailmir-ippm= -twamp-dscp-ctrl-mon.

=C2=A0

[ztr]: Specificall= y, who generate the dscp1,dscp2 and ecn? based on what?

GIM2>> The explanation of= the Class of Service TLV suggests that:

=C2=A0 =C2=A0 o =C2=A0DSCP1 - T= he Differentiated Services Code Point (DSCP) intended by

=C2=A0 =C2=A0 =C2=A0 the Sessio= n-Sender.=C2=A0 To be used as the return DSCP from the
=C2=A0 =C2=A0 =C2=A0 Session-Reflector.

=C2=A0 =C2=A0o =C2=A0DSCP2 - The received value in the DSCP field at the Se= ssion-
=C2=A0 =C2=A0 =C2=A0 Reflector in the forward direction.

A new text to be added in the n= ext update:

NEW TEXT:<= /p>

=C2=A0 =C2=A0A STAMP Session-Se= nder that includes the Class of Service TLV sets
=C2=A0 =C2=A0the value of the DSCP1 field and zeroes the value of the DSCP2= field.
=C2=A0 =C2=A0A STAMP Session-Reflector that received the test packet with t= he
=C2=A0 =C2=A0Class of Service TLV MUST include the Class of Service TLV in = the
=C2=A0 =C2=A0reflected test packet.=C2=A0 Also, the Session-Sender MUST cop= y the value
=C2=A0 =C2=A0of the DSCP field of the IP header of the received STAMP test = packet
=C2=A0 =C2=A0and copy it into the DSCP2 field of the reflected test packet.= =C2=A0 And,
=C2=A0 =C2=A0at last, the Session-Reflector MUST set the value of the DSCP = field
=C2=A0 =C2=A0in the IP header of the reflected test packet equal to the val= ue of
=C2=A0 =C2=A0the DSCP1 field of the test packet it received.<= /span>

=C2=A0

Does it make the intent and han= dling of the Class of Service TLV clearer?

=C2=A0

Thanks,

Tianran

=C2=A0

From: ippm [mailto:ippm-bo= unces@ietf.org] On Behalf Of Greg Mirsky
Sent: Thursday, June 20, 2019 3:06 PM
To: IPPM Chairs <ippm-chairs@ietf.org>; IETF IPPM WG <ippm@ietf.org>
Cc: draft-mirsky-ippm-stamp-option-tlv@ietf.org
Subject: [ippm] On progressing draft-mirsky-ippm-stamp-option-tlv

=C2=A0

Dear Chairs, et al.,<= /u>

authors of draft-mirsky-ippm-st= amp-option-tlv believe that it is stable and detailed enough to ask for you= r consideration to start the WG Adoption Poll.

=C2=A0

Regards,

Greg

--000000000000f8b4f4058c40ebf3-- From nobody Thu Jun 27 00:59:34 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 9819A120130; Thu, 27 Jun 2019 00:59:32 -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=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 mZPKjdwjg3W5; Thu, 27 Jun 2019 00:59:28 -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 2E64D1201F0; Thu, 27 Jun 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Metrics Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Jun 2019 22:57:50 -0000 Dear Brian Trammell, The session(s) that you have requested have been scheduled. Below is the scheduled session information followed by the original request. ippm Session 1 (2:00 requested) Wednesday, 24 July 2019, Afternoon Session I 1330-1530 Room Name: Van Horne size: 130 --------------------------------------------- iCalendar: https://datatracker.ietf.org/meeting/105/sessions/ippm.ics Request Information: --------------------------------------------------------- Working Group Name: IP Performance Measurement Area Name: Transport Area Session Requester: Brian Trammell Number of Sessions: 1 Length of Session(s): 2 Hours Number of Attendees: 60 Conflicts to Avoid: First Priority: tsvarea tsvwg taps bmwg xrblock quic ipsecme panrg Second Priority: iccrg maprg v6ops 6man 6lo opsec tcpm Third Priority: cdni People who must be present: Alfred Channon Morton Frank Brockners Brian Trammell Mirja Kuehlewind Gregory Mirsky Bill Cerveny Giuseppe Fioccola Tommy Pauly Resources Requested: Special Requests: --------------------------------------------------------- From nobody Sun Jun 30 19:00:07 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 CF6BB1201EC for ; Sun, 30 Jun 2019 19:00:04 -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 YOjc5bsfkUoR for ; Sun, 30 Jun 2019 19:00:02 -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 A2DC91201E9 for ; Sun, 30 Jun 2019 19:00:01 -0700 (PDT) Received: by mail-lj1-x22d.google.com with SMTP id v18so11320691ljh.6 for ; Sun, 30 Jun 2019 19:00:01 -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=dirE90nXMIpR4lI8ko4/FYlrU3NIfu/8FXsxvAvg1/0=; b=ozrYf+fIvDJK3BSaG85cqyByPG5a4ODTznEa6rSmsV/9GT6vHdfOIL7MJerZj1laTC 7cDW9GT1zxvF78Ro3j0LR5OmSa5B+UTRPIwW6fAp0dczDU4IRvGAc3V5H9LyPghhZ2L7 COxrqreaO0fmINEv2GlO5oq4haLjLtZTizUsINORrNUryGtkk8+3Oj2XeB3FLzCy8Ere s7rNQgytkzTn7qS5CdyCNiSAKPnYmCjZdhe6Qfg5Zf1k4AkY9pA+g/Q44HD31fBQLbzc M6+3N88WZy8BJ8qYZgoqtSyfQHS0Qm5SFpMM3OWUjID93VWhCzmu/IkPQs0pKvU1Veoz q+hg== 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=dirE90nXMIpR4lI8ko4/FYlrU3NIfu/8FXsxvAvg1/0=; b=DaqJ1crwc3MQpyOrMU/JlElILI2kuOlhRj3aMvV04XxHGEcYni73YH3ZzF12TBnTxk wd5VAF1V13tDQbCcgAuHrEpLo3FDamC/TRaS1mkgYnR44AXKNlaePT7KjXRpCM7btTT3 rGjVXhKQ1+YrjPhl2uzaap4wN+MTtzJSnYlvQcrAl3tXAShz5DegyAwh++Vip6fm+9uB 8V6DoYhuvDn146BU4TpnVBCW5YhDt2KqTzZ+sHPmlxFOozFb6k2FaYfrFfH2EZczABZO EOes5jUeXONgyQLyKyjFlXtgp6rCKAan+aqzmXSzOfswoZHpJOnbkaZU6ltIcth/9Cul PFQA== X-Gm-Message-State: APjAAAWV3X7eiNq45FAvbUH2ak6BXl6cGL16MTGU2puWb/3RbEqNhnfl T4YF/ZZYD1yqL7NVXyf8WxnG8QsIBrPx3Kv52WdpOUAb X-Google-Smtp-Source: APXvYqysrc9VWiiJyKDVixXPpZYLeftErvBXUQJxkNeNz8HZr1c7CySQKAWPrUYrQ7hiXuQ6Vs1R2dCBaD/3CbhqrVc= X-Received: by 2002:a2e:7c14:: with SMTP id x20mr12774273ljc.56.1561946399248; Sun, 30 Jun 2019 18:59:59 -0700 (PDT) MIME-Version: 1.0 References: <156194304677.22181.4728890267929283491.idtracker@ietfa.amsl.com> In-Reply-To: <156194304677.22181.4728890267929283491.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Sun, 30 Jun 2019 18:59:47 -0700 Message-ID: To: IETF IPPM WG Content-Type: multipart/alternative; boundary="000000000000491740058c94fc2c" Archived-At: Subject: [ippm] Fwd: New Version Notification for draft-mirsky-ippm-stamp-option-tlv-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, 01 Jul 2019 02:00:05 -0000 --000000000000491740058c94fc2c Content-Type: text/plain; charset="UTF-8" Dear All, updates to address comments from Tianran Zhou and the discussion that followed. Regards, Greg ---------- Forwarded message --------- From: Date: Sun, Jun 30, 2019 at 6:04 PM Subject: New Version Notification for draft-mirsky-ippm-stamp-option-tlv-04.txt To: Henrik Nydell , Min Xiao , Gregory Mirsky , Richard Foote < footer.foote@nokia.com>, Guo Jun A new version of I-D, draft-mirsky-ippm-stamp-option-tlv-04.txt has been successfully submitted by Greg Mirsky and posted to the IETF repository. Name: draft-mirsky-ippm-stamp-option-tlv Revision: 04 Title: Simple Two-way Active Measurement Protocol Optional Extensions Document date: 2019-06-30 Group: Individual Submission Pages: 16 URL: https://www.ietf.org/internet-drafts/draft-mirsky-ippm-stamp-option-tlv-04.txt Status: https://datatracker.ietf.org/doc/draft-mirsky-ippm-stamp-option-tlv/ Htmlized: https://tools.ietf.org/html/draft-mirsky-ippm-stamp-option-tlv-04 Htmlized: https://datatracker.ietf.org/doc/html/draft-mirsky-ippm-stamp-option-tlv Diff: https://www.ietf.org/rfcdiff?url2=draft-mirsky-ippm-stamp-option-tlv-04 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. 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. The IETF Secretariat --000000000000491740058c94fc2c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
updates to address comments from Tianran Zho= u and the discussion that followed.

Regards,
=
Greg

---------- Forwarded message ---------
From: &= lt;internet-drafts@ietf.org= >
Date: Sun, Jun 30, 2019 at 6:04 PM
Subject: New Version N= otification for draft-mirsky-ippm-stamp-option-tlv-04.txt
To: Henrik Nyd= ell <hnydell@accedian.com>= ;, Min Xiao <xiao.min2@zte.com.c= n>, Gregory Mirsky <greg= imirsky@gmail.com>, Richard Foote <footer.foote@nokia.com>, Guo Jun <guo.jun2@zte.com.cn>



A new version of I-D, draft-mirsky-ippm-stamp-option-tlv-04.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-ippm-stamp-optio= n-tlv
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A004
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Simple Two-way Active Measurement = Protocol Optional Extensions
Document date:=C2=A0 2019-06-30
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 16
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draft-mirsky-i= ppm-stamp-option-tlv-04.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-mirsky-ippm-stamp-option-tl= v/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://tools.ietf.org/html/draft-mirsky-ippm-stamp-option-tlv-04
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-mirsky-ippm-stamp-optio= n-tlv
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-mirsky-ippm-st= amp-option-tlv-04

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.




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.

The IETF Secretariat

--000000000000491740058c94fc2c--