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[5.95.15.242]) by smtp.gmail.com with ESMTPSA id x5sm7393511wmf.33.2019.07.01.05.17.32 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 01 Jul 2019 05:17:32 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: stefano previdi In-Reply-To: Date: Mon, 1 Jul 2019 14:17:32 +0200 Cc: SPRING WG List Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Rob Shakir X-Mailer: Apple Mail (2.2104) Archived-At: Subject: Re: [spring] WG Adoption Call: draft-guichard-spring-nsh-sr X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Jul 2019 12:17:37 -0000 support. Thanks. s. > On Jun 27, 2019, at 8:13 AM, Rob Shakir = wrote: >=20 > Hi SPRING WG, >=20 > This email initiates a two week working group adoption call for = draft-guichard-spring-nsh-sr. This follows the discussion that we had in = the last few IETF meetings, and particularly the focused discussion we = had at IETF 104 regarding service chaining and SPRING. >=20 > Please indicate your support, comments, or objections for adopting = this draft by Wednesday July 10th, 2019.. We are particularly interested = in hearing from WG members who are not authors of this draft, and those = folks that are willing to spend time working on this draft after = adoption. >=20 > We are also looking for volunteers who can provide a technical review = of the content of the draft at a later stage of its progress through the = working group (e.g., before WGLC). >=20 > In parallel - we'll send an IPR poll to the working group and authors. = The currently disclosed IPR can be found in the datatracker. >=20 > Thanks! > Rob & Bruno. >=20 >=20 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Mon Jul 1 05:18:29 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ED8ED1200A3 for ; Mon, 1 Jul 2019 05:18:26 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=previdi-net.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5vfCSLc6w5dd for ; Mon, 1 Jul 2019 05:18:25 -0700 (PDT) Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) (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 B827712004D for ; Mon, 1 Jul 2019 05:18:24 -0700 (PDT) Received: by mail-wr1-x433.google.com with SMTP id p13so13568139wru.10 for ; Mon, 01 Jul 2019 05:18:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=previdi-net.20150623.gappssmtp.com; s=20150623; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=g+0Z2yqnehMWd9OMRuMtpZy8Iy9cjBt7oXCLjBE//9g=; b=QvYGXEwLlJrONhCx9v2TLDSGfYKW+Qkr2RUSEPTdiQBbFHLnc0iXohH4w1ZnnrNRn1 leWH8YJ2216Wb5VeHeSK4DN9GO0CTns4A41VJB3zXmee2brvuhbsHu+93ZgLsyNaPSst oksSTZ/wdEltKk0fFYFmCHaFhaihZ6Gq7KjSlKAOpun/HGFEkGK+A84mvrK93yD0+ROj +yhvGkwnXwPokzmPLvRbbT9cSSP9uttfi8rfRtUR/salCAR9QOWK8SDZvN227fU9yrWk ASmx4eoXT0k2X91I9DUh3tcLIBKmzKCAzLrmB0LJBRgCkxAV6DHP2/aQ977PF6sKO5GA Szog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=g+0Z2yqnehMWd9OMRuMtpZy8Iy9cjBt7oXCLjBE//9g=; b=i4FM6WR6tLKfk82qLIVrcS38/0lquUJ85hEhMFeJt2oqusqCiHRIpqeLvGPemTpwll BoQHoquEB7nlu5TMCEjvZk8OPsXOD76FIm7jCayEXQI++GqFPF7EDovRmAmpRN5eYTCk kIBdlns4wyN5TvMEIoUejYCgr2e6rB3jpjGGuF9Ph5Pjyo8Y0wvnrbHCJjZsWBWULuvx DFRA3Rc02T/VZhIHAIdd7jT5WOSZsPDbrcsxsfLEGS5Cj18guClkRxVDPsEI3FPYGNer Iz4rF3q5wwJg14/txVevVra9NvwVI4GOcJ0nb9Z2mRALe/3kYBv4rEnRb2z0Be+1c7ii Vv6w== X-Gm-Message-State: APjAAAUtCnJ0aiU7ZwhqvVcdjTSxKWt8ctaxueALTfovU9FrCX+MVDf5 kGgbGJrv6T2rkG4dPkdWNRr6CYjuuI4= X-Google-Smtp-Source: APXvYqwq5ZNFjHVV/0M7q6BB9NbWG9ajfjaDT8tpR9OpoIZ5u9DnBZNRj5n9pi2yGoLk3fdEhVyLNA== X-Received: by 2002:adf:f80a:: with SMTP id s10mr6340040wrp.39.1561983503160; Mon, 01 Jul 2019 05:18:23 -0700 (PDT) Received: from [192.168.1.7] (net-5-95-15-242.cust.vodafonedsl.it. [5.95.15.242]) by smtp.gmail.com with ESMTPSA id x5sm7393511wmf.33.2019.07.01.05.18.22 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 01 Jul 2019 05:18:22 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: stefano previdi In-Reply-To: Date: Mon, 1 Jul 2019 14:18:22 +0200 Cc: SPRING WG List Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Rob Shakir X-Mailer: Apple Mail (2.2104) Archived-At: Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Jul 2019 12:18:27 -0000 support. Thanks. s. > On Jun 27, 2019, at 8:13 AM, Rob Shakir = wrote: >=20 > Hi SPRING WG, >=20 > This email initiates a two week working group adoption call for = draft-xuclad-spring-sr-service-programming. This follows the discussion = that we had in the last few IETF meetings, and particularly the focused = discussion we had at IETF 104 regarding service chaining and SPRING. >=20 > Please indicate your support, comments, or objections for adopting = this draft by Wednesday July 10th, 2019. We are particularly interested = in hearing from WG members who are not authors of this draft, and those = folks that are willing to spend time working on this draft after = adoption. >=20 > We are also looking for volunteers who can provide a technical review = of the content of the draft at a later stage of its progress through the = working group (e.g., before WGLC). >=20 > In parallel - we'll send an IPR poll to the working group and authors. = The currently disclosed IPR can be found in the datatracker. >=20 > Thanks! > Rob & Bruno. > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Mon Jul 1 05:26:18 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1EC9D12011D; Mon, 1 Jul 2019 05:26:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO 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from lhreml709-chm.china.huawei.com (10.201.108.58) by lhreml709-chm.china.huawei.com (10.201.108.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Mon, 1 Jul 2019 13:26:09 +0100 Received: from NKGEML414-HUB.china.huawei.com (10.98.56.75) by lhreml709-chm.china.huawei.com (10.201.108.58) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P256) id 15.1.1713.5 via Frontend Transport; Mon, 1 Jul 2019 13:26:08 +0100 Received: from NKGEML515-MBS.china.huawei.com ([169.254.5.134]) by nkgeml414-hub.china.huawei.com ([10.98.56.75]) with mapi id 14.03.0415.000; Mon, 1 Jul 2019 20:24:59 +0800 From: "Dongjie (Jimmy)" To: SPRING WG List CC: "spring-chairs@ietf.org" Thread-Topic: New Version Notification for draft-dong-spring-sr-for-enhanced-vpn-04.txt Thread-Index: AQHVMAaJGiuuErsE10GRoeK+NR8yJKa1rYkA Date: Mon, 1 Jul 2019 12:24:59 +0000 Message-ID: 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Malis" Date: Tue, 2 Jul 2019 07:14:30 -0400 Message-ID: To: Ron Bonica Cc: SPRING WG , 6man WG Content-Type: multipart/alternative; boundary="000000000000f6a98e058cb0d936" Archived-At: Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-00.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Jul 2019 11:14:46 -0000 --000000000000f6a98e058cb0d936 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Ron, Just curious - since draft-ietf-6man-segment-routing-header is in 6man, shouldn't this be aimed at 6man as well? Cheers, Andy On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica wrote: > Folks, > > Please review this draft and comment. > > Ron > > > > Juniper Business Use Only > > -----Original Message----- > From: internet-drafts@ietf.org > Sent: Monday, July 1, 2019 10:27 PM > To: Ron Bonica ; Andrew Alston < > Andrew.Alston@liquidtelecom.com>; Joel Halpern ; > Andrew Alston ; Daniam Henriques < > daniam.henriques@liquidtelecom.com>; Jen Linkova ; Yuji > Kamite > Subject: New Version Notification for draft-bonica-spring-srv6-plus-00.tx= t > > > A new version of I-D, draft-bonica-spring-srv6-plus-00.txt > has been successfully submitted by Ron Bonica and posted to the IETF > repository. > > Name: draft-bonica-spring-srv6-plus > Revision: 00 > Title: IPv6 Support for Segment Routing: SRv6+ > Document date: 2019-07-01 > Group: Individual Submission > Pages: 23 > URL: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_inter= net-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&d=3DDwICaQ&c=3D= HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AW= F2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Df9eRsP= zrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&e=3D > Status: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.o= rg_doc_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus_&d=3DDwICaQ&c=3DHAkYuh63rsuhr6= Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThK= P8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeePVTP8VTbcR4Tpnv= _hZo97c6qRVc8ZNPyfEDugA&e=3D > Htmlized: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_htm= l_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00&d=3DDwICaQ&c=3DHAkYuh63rsuhr6S= cbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP= 8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9JYjduX8ZtyCxs4= 9VG31Ijs5p6Dmz6ka7JDQ4&e=3D > Htmlized: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.o= rg_doc_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus&d=3DDwICaQ&c=3DHAkYuh63rs= uhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwr= DThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Ya6wV9Pug7Yh-ve= bYFvEsuuY9vpaA9dKNmD6egK8yM&e=3D > > > Abstract: > This document describes SRv6+. SRv6+ is a Segment Routing (SR) > solution that leverages IPv6. It supports a wide variety of use- > cases while remaining in strict compliance with IPv6 specifications. > SRv6+ is optimized for for ASIC-based forwarding devices that operate > at high data rates. > > > > > 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 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --000000000000f6a98e058cb0d936 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Ron,

Just curious - since=C2=A0draft-ie= tf-6man-segment-routing-header is in 6man, shouldn't this be aimed at 6= man as well?

Cheers,
Andy

=

On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica <rbonica=3D40juniper.net@dmarc.ietf.org> wr= ote:
Folks,

Please review this draft and comment.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Ron



Juniper Business Use Only

-----Original Message-----
From: interne= t-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Monday, July 1, 2019 10:27 PM
To: Ron Bonica <rbonica@juniper.net>; Andrew Alston <Andrew.Alston@liquidtelecom.com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew.alston= @liquidtelecom.com>; Daniam Henriques <daniam.henriques@liquidteleco= m.com>; Jen Linkova <furry@google.com>; Yuji Kamite <y.kamite@ntt.com>
Subject: New Version Notification for draft-bonica-spring-srv6-plus-00.txt<= br>

A new version of I-D, draft-bonica-spring-srv6-plus-00.txt
has been successfully submitted by Ron Bonica and posted to the IETF reposi= tory.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-bonica-spring-srv6-plus=
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IPv6 Support for Segment Routing: = SRv6+
Document date:=C2=A0 2019-07-01
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 23
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf= .org_internet-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&d= =3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9F= Q82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqS= YhsPge2Y6i5Fo5I&s=3Df9eRsPzrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&e= =3D
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://u= rldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc_draf= t-2Dbonica-2Dspring-2Dsrv6-2Dplus_&d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scb= fh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDTh= KP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeePVTP8V= TbcR4Tpnv_hZo97c6qRVc8ZNPyfEDugA&e=3D
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://urldefe= nse.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dbonica-= 2Dspring-2Dsrv6-2Dplus-2D00&d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBX= eMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&= ;m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9JYjduX8ZtyC= xs49VG31Ijs5p6Dmz6ka7JDQ4&e=3D
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://ur= ldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc_html_= draft-2Dbonica-2Dspring-2Dsrv6-2Dplus&d=3DDwICaQ&c=3DHAkYuh63rsuhr6= Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwr= DThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Ya6wV9P= ug7Yh-vebYFvEsuuY9vpaA9dKNmD6egK8yM&e=3D


Abstract:
=C2=A0 =C2=A0This document describes SRv6+. SRv6+ is a Segment Routing (SR)=
=C2=A0 =C2=A0solution that leverages IPv6.=C2=A0 It supports a wide variety= of use-
=C2=A0 =C2=A0cases while remaining in strict compliance with IPv6 specifica= tions.
=C2=A0 =C2=A0SRv6+ is optimized for for ASIC-based forwarding devices that = operate
=C2=A0 =C2=A0at high data rates.




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
_______________________________________________
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[24.5.53.184]) by smtp.gmail.com with ESMTPSA id d24sm19792064wra.43.2019.07.02.08.55.24 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Jul 2019 08:55:25 -0700 (PDT) From: Bob Hinden Message-Id: Content-Type: multipart/signed; boundary="Apple-Mail=_DED80E94-764F-409E-8F73-6A67F256EA39"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Tue, 2 Jul 2019 08:55:21 -0700 In-Reply-To: Cc: Bob Hinden , SPRING WG , IPv6 List To: "Andrew G. Malis" References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-00.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Jul 2019 15:55:31 -0000 --Apple-Mail=_DED80E94-764F-409E-8F73-6A67F256EA39 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Andy, > On Jul 2, 2019, at 4:14 AM, Andrew G. Malis wrote: >=20 > Ron, >=20 > Just curious - since draft-ietf-6man-segment-routing-header is in = 6man, shouldn't this be aimed at 6man as well? I wondered about this as well, but reading this briefly, this draft = doesn=E2=80=99t define any new IPv6 bits, there are two other drafts = that do. See: bonica-6man-comp-rtg-hdr, and bonica-6man-seg-end-opt Bob >=20 > Cheers, > Andy >=20 >=20 > On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica = wrote: > Folks, >=20 > Please review this draft and comment. >=20 > Ron >=20 >=20 >=20 > Juniper Business Use Only >=20 > -----Original Message----- > From: internet-drafts@ietf.org > Sent: Monday, July 1, 2019 10:27 PM > To: Ron Bonica ; Andrew Alston = ; Joel Halpern = ; Andrew Alston = ; Daniam Henriques = ; Jen Linkova ; = Yuji Kamite > Subject: New Version Notification for = draft-bonica-spring-srv6-plus-00.txt >=20 >=20 > A new version of I-D, draft-bonica-spring-srv6-plus-00.txt > has been successfully submitted by Ron Bonica and posted to the IETF = repository. >=20 > Name: draft-bonica-spring-srv6-plus > Revision: 00 > Title: IPv6 Support for Segment Routing: SRv6+ > Document date: 2019-07-01 > Group: Individual Submission > Pages: 23 > URL: = https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf..org_inter= net-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&d=3DDwICaQ&c=3D= HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-A= WF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Df9eR= sPzrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&e=3D > Status: = https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.or= g_doc_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus_&d=3DDwICaQ&c=3DHAkYuh63rsuhr6= Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDTh= KP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeePVTP8VTbcR4Tp= nv_hZo97c6qRVc8ZNPyfEDugA&e=3D > Htmlized: = https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html= _draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00&d=3DDwICaQ&c=3DHAkYuh63rsuhr6S= cbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThK= P8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9JYjduX8ZtyCx= s49VG31Ijs5p6Dmz6ka7JDQ4&e=3D > Htmlized: = https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.or= g_doc_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus&d=3DDwICaQ&c=3DHAkYuh63rs= uhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAw= rDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Ya6wV9Pug7Yh-= vebYFvEsuuY9vpaA9dKNmD6egK8yM&e=3D >=20 >=20 > Abstract: > This document describes SRv6+. SRv6+ is a Segment Routing (SR) > solution that leverages IPv6. It supports a wide variety of use- > cases while remaining in strict compliance with IPv6 = specifications. > SRv6+ is optimized for for ASIC-based forwarding devices that = operate > at high data rates. >=20 >=20 >=20 >=20 > Please note that it may take a couple of minutes from the time of = submission until the htmlized version and diff are available at = tools.ietf.org. >=20 > The IETF Secretariat > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- --Apple-Mail=_DED80E94-764F-409E-8F73-6A67F256EA39 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEm0rfRsOCoyamPexGrut0EXfnu6gFAl0bfmkACgkQrut0EXfn u6iNigf+LF64v/pF16U5dXfF+njnN+QOddwIz6uySek/8W8LSf6C5/memL74TYna 9f2huF14/NRNg1h6O9Xtl9e/n2S+lkWM8Ep3VNWnm78vp/mbc/fsutT+7v3B7i/Z E9N/H5d8+yroPVX9Yl/CZeBnaf7UxH47i+RbLomsOieZcPuAwV88eT8exh2EwVed gpGiLtCiqC9o0DqSrT+UFocqDi8l76oL77GlS8e6GE1AueK28gqyYV9C1W6ONQnD F3ZVktM4MACUMc0jyrafYApc1w25ZpLNOu9nXtQ8qe+fzVeLsy+tojtzUlPF7JzX NHB7jtGfHcGalLQvLz3OKy4Vh3vteg== =cYC6 -----END PGP SIGNATURE----- --Apple-Mail=_DED80E94-764F-409E-8F73-6A67F256EA39-- From nobody Tue Jul 2 10:44:28 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5CACC1206C7; Tue, 2 Jul 2019 10:44:25 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JvUIViMCJM-r; Tue, 2 Jul 2019 10:44:23 -0700 (PDT) Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) (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 7C5C61206C9; Tue, 2 Jul 2019 10:44:17 -0700 (PDT) Received: by mail-qk1-x732.google.com with SMTP id m14so14895912qka.10; Tue, 02 Jul 2019 10:44:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=FA804peGhrRzt/wEJHHgZ6P4cMTBFzc4D8Yc05zMIeA=; b=INgGeGZUOuSdEFAVT7pzSK+lzdLOr1q37V+RFB29R9i96NdSGHVlYN8NaNztNQ3fNz ZD9j2H1xx3yMpX57ty5GZKwPgA1fuxAMkggMnJ1juVhKOErpADX/q+vvckQ6fiwryOA+ emIWHn6iVN7cJjvEoRsf017tw/8TS5O5zAsFWDfg++XaXtQrLjS7Ka18UzyxKzUPBXMo HPtWmuZ5uv3ZjXx12zi0ykvpJ8osZPXcwO3S1aowIPSp1+hQGaQq6nBZsctlH+1nKsA1 marbLd6Am/B9i/Y4Om0SnhN8lsiZAe7GET5dznpEX+lnXXHKasdWLvnLZHOo153bPab7 iOEQ== 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=FA804peGhrRzt/wEJHHgZ6P4cMTBFzc4D8Yc05zMIeA=; b=VIU2+u2C4hvqZtrloUdaVPNkWDTMaZ85JsF3BWX+r0olqSgwzXvZmY72uSp3Nq0sfs 0k6BcDQYJLr3hvWHqOVRZDWwdez3ky6t6zGLMdVJh6PrPwhmyIUD7mH0J3gQhuQjDMO4 KSwkhNgqxICTztxXj/Rqy6b6MmlXERSDPFpslOyo5BYWnBcXAuP1U1LazP1YgW9gMPmd Er2+SOCmN7bSurB51Dy1gWUnUQoSF4M99/GJQeGNWvuny2MfVa/v5sDX2euIS3PNLGN1 gyouYJPn/JGHrcER3QcbBM5/PPIEk4janek2x82agtrIrYLmp13BjLqbIAsKNJsBpTJ4 LNrw== X-Gm-Message-State: APjAAAUzY0ir3MMpfDqBUsqpvPmF3harkMmA+XDYuRd368IU3EMGJFHY pOkGiZPKDl2Vg3pmrQfNsnlGv2z0a4tSVcCcRHw= X-Google-Smtp-Source: APXvYqzDMC7g+fxze4KNH5XaRFKJDQOel657D8cvxSzs+HXxZDDcgJ1U6GYodt6pzf2H7ef3rbP2cTOYHD8ED+kTT/A= X-Received: by 2002:a05:620a:13f9:: with SMTP id h25mr24122448qkl.283.1562089456301; Tue, 02 Jul 2019 10:44:16 -0700 (PDT) MIME-Version: 1.0 References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: From: "Andrew G. Malis" Date: Tue, 2 Jul 2019 13:44:05 -0400 Message-ID: To: Bob Hinden Cc: SPRING WG , IPv6 List Content-Type: multipart/alternative; boundary="000000000000267a03058cb64ba5" Archived-At: Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-00.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Jul 2019 17:44:26 -0000 --000000000000267a03058cb64ba5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Bob, Thanks, that explains it. Cheers, Andy On Tue, Jul 2, 2019 at 11:55 AM Bob Hinden wrote: > Andy, > > > On Jul 2, 2019, at 4:14 AM, Andrew G. Malis wrote: > > > > Ron, > > > > Just curious - since draft-ietf-6man-segment-routing-header is in 6man, > shouldn't this be aimed at 6man as well? > > I wondered about this as well, but reading this briefly, this draft > doesn=E2=80=99t define any new IPv6 bits, there are two other drafts that= do. See: > > bonica-6man-comp-rtg-hdr, and > bonica-6man-seg-end-opt > > Bob > > > > > > > Cheers, > > Andy > > > > > > On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica 40juniper.net@dmarc.ietf.org> wrote: > > Folks, > > > > Please review this draft and comment. > > > > Ron > > > > > > > > Juniper Business Use Only > > > > -----Original Message----- > > From: internet-drafts@ietf.org > > Sent: Monday, July 1, 2019 10:27 PM > > To: Ron Bonica ; Andrew Alston < > Andrew.Alston@liquidtelecom.com>; Joel Halpern ; > Andrew Alston ; Daniam Henriques < > daniam.henriques@liquidtelecom.com>; Jen Linkova ; Yuji > Kamite > > Subject: New Version Notification for > draft-bonica-spring-srv6-plus-00.txt > > > > > > A new version of I-D, draft-bonica-spring-srv6-plus-00.txt > > has been successfully submitted by Ron Bonica and posted to the IETF > repository. > > > > Name: draft-bonica-spring-srv6-plus > > Revision: 00 > > Title: IPv6 Support for Segment Routing: SRv6+ > > Document date: 2019-07-01 > > Group: Individual Submission > > Pages: 23 > > URL: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf..org_inte= rnet-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&d=3DDwICaQ&c= =3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl= -AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Df9e= RsPzrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&e=3D > > Status: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.o= rg_doc_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus_&d=3DDwICaQ&c=3DHAkYuh63rsuhr6= Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThK= P8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeePVTP8VTbcR4Tpnv= _hZo97c6qRVc8ZNPyfEDugA&e=3D > > Htmlized: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_htm= l_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00&d=3DDwICaQ&c=3DHAkYuh63rsuhr6S= cbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP= 8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9JYjduX8ZtyCxs4= 9VG31Ijs5p6Dmz6ka7JDQ4&e=3D > > Htmlized: > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.o= rg_doc_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus&d=3DDwICaQ&c=3DHAkYuh63rs= uhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwr= DThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Ya6wV9Pug7Yh-ve= bYFvEsuuY9vpaA9dKNmD6egK8yM&e=3D > > > > > > Abstract: > > This document describes SRv6+. SRv6+ is a Segment Routing (SR) > > solution that leverages IPv6. It supports a wide variety of use- > > cases while remaining in strict compliance with IPv6 specifications. > > SRv6+ is optimized for for ASIC-based forwarding devices that operat= e > > at high data rates. > > > > > > > > > > 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 > > _______________________________________________ > > spring mailing list > > spring@ietf.org > > https://www.ietf.org/mailman/listinfo/spring > > -------------------------------------------------------------------- > > IETF IPv6 working group mailing list > > ipv6@ietf.org > > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > > -------------------------------------------------------------------- > > --000000000000267a03058cb64ba5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Bob,

Thanks, that explains it.

Cheers,
Andy


On Tue, Jul 2, = 2019 at 11:55 AM Bob Hinden <bob= .hinden@gmail.com> wrote:
Andy,

> On Jul 2, 2019, at 4:14 AM, Andrew G. Malis <agmalis@gmail.com> wrote:
>
> Ron,
>
> Just curious - since draft-ietf-6man-segment-routing-header is in 6man= , shouldn't this be aimed at 6man as well?

I wondered about this as well, but reading this briefly, this draft doesn= =E2=80=99t define any new IPv6 bits, there are two other drafts that do.=C2= =A0 See:

bonica-6man-comp-rtg-hdr, and
bonica-6man-seg-end-opt

Bob



>
> Cheers,
> Andy
>
>
> On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica <rbonica=3D40juniper.net@dmarc.ie= tf.org> wrote:
> Folks,
>
> Please review this draft and comment.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: in= ternet-drafts@ietf.org <internet-drafts@ietf.org>
> Sent: Monday, July 1, 2019 10:27 PM
> To: Ron Bonica <rbonica@juniper.net>; Andrew Alston <Andrew.Alston@liquidtelecom.= com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew.als= ton@liquidtelecom.com>; Daniam Henriques <daniam.henriques@liquidtel= ecom.com>; Jen Linkova <furry@google.com>; Yuji Kamite <y.kamite@ntt.com>
> Subject: New Version Notification for draft-bonica-spring-srv6-plus-00= .txt
>
>
> A new version of I-D, draft-bonica-spring-srv6-plus-00.txt
> has been successfully submitted by Ron Bonica and posted to the IETF r= epository.
>
> Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-bonica-spring-srv6= -plus
> Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000
> Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IPv6 Support for Segment Rout= ing: SRv6+
> Document date:=C2=A0 2019-07-01
> Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
> Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 23
> URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.= ietf..org_internet-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&= amp;d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3D= Fch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jj= p_wqSYhsPge2Y6i5Fo5I&s=3Df9eRsPzrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&am= p;e=3D
> Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0http= s://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc= _draft-2Dbonica-2Dspring-2Dsrv6-2Dplus_&d=3DDwICaQ&c=3DHAkYuh63rsuh= r6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcA= wrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeeP= VTP8VTbcR4Tpnv_hZo97c6qRVc8ZNPyfEDugA&e=3D
> Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://ur= ldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dbo= nica-2Dspring-2Dsrv6-2Dplus-2D00&d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh= 0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP= 8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9JYjduX= 8ZtyCxs49VG31Ijs5p6Dmz6ka7JDQ4&e=3D
> Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0http= s://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc= _html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus&d=3DDwICaQ&c=3DHAkYuh63= rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2Ef= pHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Y= a6wV9Pug7Yh-vebYFvEsuuY9vpaA9dKNmD6egK8yM&e=3D
>
>
> Abstract:
>=C2=A0 =C2=A0 This document describes SRv6+. SRv6+ is a Segment Routing= (SR)
>=C2=A0 =C2=A0 solution that leverages IPv6.=C2=A0 It supports a wide va= riety of use-
>=C2=A0 =C2=A0 cases while remaining in strict compliance with IPv6 spec= ifications.
>=C2=A0 =C2=A0 SRv6+ is optimized for for ASIC-based forwarding devices = that operate
>=C2=A0 =C2=A0 at high data rates.
>
>
>
>
> Please note that it may take a couple of minutes from the time of subm= ission until the htmlized version and diff are available at tools.ietf.org.=
>
> The IETF Secretariat
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring > -------------------------------------------------------------------- > IETF IPv6 working group mailing list
> ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman= /listinfo/ipv6
> --------------------------------------------------------------------
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PjxvOnA+Jm5ic3A7PC9vOnA+PC9zcGFuPjwvcD4NCjwvZGl2Pg0KPC9kaXY+DQo8L2Rpdj4NCjwv Ym9keT4NCjwvaHRtbD4NCg== --_000_59D2854324914487AD54F5320FE46451bellca_-- From nobody Tue Jul 2 20:29:26 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8CC2B1200F6; Tue, 2 Jul 2019 20:29:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Sr9i75_eFBqa; Tue, 2 Jul 2019 20:29:20 -0700 (PDT) Received: from cmccmta1.chinamobile.com (cmccmta1.chinamobile.com [221.176.66.79]) by ietfa.amsl.com (Postfix) with ESMTP id A433F12012A; Tue, 2 Jul 2019 20:29:16 -0700 (PDT) Received: from spf.mail.chinamobile.com (unknown[172.16.121.3]) by rmmx-syy-dmz-app04-12004 (RichMail) with SMTP id 2ee45d1c20f536f-a77ae; Wed, 03 Jul 2019 11:28:55 +0800 (CST) X-RM-TRANSID: 2ee45d1c20f536f-a77ae X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from cmccPC (unknown[223.69.29.33]) by rmsmtp-syy-appsvr02-12002 (RichMail) with SMTP id 2ee25d1c20f680f-2f6aa; Wed, 03 Jul 2019 11:28:55 +0800 (CST) X-RM-TRANSID: 2ee25d1c20f680f-2f6aa From: "qinfengwei" To: "'Dongjie \(Jimmy\)'" , "'SPRING WG List'" Cc: References: <156198326344.5808.2617871866263111602.idtracker@ietfa.amsl.com> <76CD132C3ADEF848BD84D028D243C927CCECFADB@NKGEML515-MBS.china.huawei.com> In-Reply-To: <76CD132C3ADEF848BD84D028D243C927CCECFADB@NKGEML515-MBS.china.huawei.com> Date: Wed, 3 Jul 2019 11:28:51 +0800 Message-ID: <008801d5314f$7127d170$53777450$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AQHVMAaJGiuuErsE10GRoeK+NR8yJKa1rYkAgAKPgPA= Content-Language: zh-cn Archived-At: Subject: [spring] =?utf-8?b?562U5aSNOiAgRlc6IE5ldyBWZXJzaW9uIE5vdGlmaWNh?= =?utf-8?q?tion_for_draft-dong-spring-sr-for-enhanced-vpn-04=2Etxt?= X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 03:29:25 -0000 Hi all, 5G is about to enter the commercial stage in China Mobile, its network = need provide end-to-end network slicing. 5G mobile service is quite = different from other services, which require hard slice and soft slice. = For uRLLC, the hard isolation=20 could be used to satisfy its high demand of bandwidth and delay. For = other scenarios, the customized virtual network could be provided by the = bearer network to meet the requirement of bandwidth, delay ,jitter, etc. SR is a technical direction of the bearer network. The draft could = support the combination of hard and soft isolation, which is a good = idea. The draft could be got more discussion and further progress.=20 We hope WG could improve this draft ASAP so that it can be adopted in = network in the near future. Thanks & BR Fengwei Qin -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6----- =E5=8F=91=E4=BB=B6=E4=BA=BA: spring [mailto:spring-bounces@ietf.org] = =E4=BB=A3=E8=A1=A8 Dongjie (Jimmy) =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B47=E6=9C=881=E6=97=A5 = 20:25 =E6=94=B6=E4=BB=B6=E4=BA=BA: SPRING WG List =E6=8A=84=E9=80=81: spring-chairs@ietf.org =E4=B8=BB=E9=A2=98: [spring] FW: New Version Notification for = draft-dong-spring-sr-for-enhanced-vpn-04.txt Hi all, We just submitted a new revision of = draft-dong-spring-sr-for-enhanced-vpn. The major changes in this version = are:=20 1. Clarify that each virtual network can have customized network = topology and may have dedicated network resources, so that both soft = isolation and hard isolation can be covered. 2. Focus on the usage of SR-MPLS SID and SRv6 locator/SID as data plane = identifiers of virtual network topology and resource.=20 3. In section 5 "Procedures", polish the description about the mechanism = of creating SR virtual networks, and clarify that enhanced VPNs can be = mapped to the same or different SR virtual networks. 4. Section 6 =E2=80=9CBenefits of the proposed mechanism=E2=80=9D is = simplified by focusing on the features of the proposed mechanism.=20 5. Add new coauthors. Your review and comments are welcome. Best regards, Jie (on behalf of co-authors) -----Original Message----- From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]=20 Sent: Monday, July 01, 2019 8:14 PM To: Takuya Miyasaka ; Zhenqiang Li = ; Fengwei Qin ; = Yongqing Zhu ; Stewart Bryant = ; Dongjie (Jimmy) Subject: New Version Notification for = draft-dong-spring-sr-for-enhanced-vpn-04.txt A new version of I-D, draft-dong-spring-sr-for-enhanced-vpn-04.txt has been successfully submitted by Jie Dong and posted to the IETF = repository. Name: draft-dong-spring-sr-for-enhanced-vpn Revision: 04 Title: Segment Routing for Enhanced VPN Service Document date: 2019-07-01 Group: Individual Submission Pages: 19 URL: = https://www.ietf.org/internet-drafts/draft-dong-spring-sr-for-enhanced-vp= n-04.txt Status: = https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ Htmlized: = https://tools.ietf.org/html/draft-dong-spring-sr-for-enhanced-vpn-04 Htmlized: = https://datatracker.ietf.org/doc/html/draft-dong-spring-sr-for-enhanced-v= pn Diff: = https://www.ietf.org/rfcdiff?url2=3Ddraft-dong-spring-sr-for-enhanced-vpn= -04 Abstract: Enhanced VPN (VPN+) is an enhancement to VPN technology to enable it to support the needs of new applications, particularly applications that are associated with 5G services. These applications require better isolation from both control and data plane's perspective and have more stringent performance requirements than can be provided with overlay VPNs. The characteristics of an enhanced VPN as perceived by its tenant needs to be comparable to those of a dedicated private network. This requires tight integration between the overlay VPN and the underlay network topology and resources in a scalable manner. An enhanced VPN may form the underpinning of 5G network slicing, but will also be of use in its own right. This document describes the use of segment routing based mechanisms to provide the enhanced VPN service with required network topology and resources. The overall mechanism of using segment routing to provide enhanced VPN service is also described. The proposed mechanism is applicable to both SR with MPLS data plane and SR with IPv6 data plane (SRv6). = =20 Please note that it may take a couple of minutes from the time of = submission until the htmlized version and diff are available at = tools.ietf.org. The IETF Secretariat _______________________________________________ spring mailing list spring@ietf.org https://www.ietf.org/mailman/listinfo/spring From nobody Tue Jul 2 23:58:12 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 210DB120753 for ; Tue, 2 Jul 2019 23:58:09 -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, 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 HLIzOvIH7o6Q for ; Tue, 2 Jul 2019 23:58:07 -0700 (PDT) Received: from mail-pf1-x431.google.com (mail-pf1-x431.google.com [IPv6:2607:f8b0:4864:20::431]) (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 3054012038B for ; Tue, 2 Jul 2019 23:58:07 -0700 (PDT) Received: by mail-pf1-x431.google.com with SMTP id p184so740054pfp.7 for ; Tue, 02 Jul 2019 23:58:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; bh=0uL2vtmpomEMWYq15hyY8qrt17ba0vixMjldiJjqIh0=; b=C7fT09SwqPhsbt1dJG9FfTRrmUdX87aBDaTD8fq1vaNfS7JKSX/WUotJLGFPq8lpFw hhSkvStSEbhEEa97Pt6W4noXqQzMx6FS/ODyBL1OtDBlbZby/npcQESrc0tnmVUHF11p 5znngj+YBX8aZMbgEnupn6ei09SaLa0shd+33sAMSWe/LYUuE5ZoML14n0eJFtMff9cT 75uYvkSuA6wVErjxdwbmvgdzrKbTmB0wCpifDiTg/YR25jKB1ogJR1N6ob32UsTZZFuj 10lJlo+M77aLtghyrrVZySDqckqKd4RSJDfjmnKhC8RdQ1cBm/yvSag2M2EXx8bUEjOF J/fQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; bh=0uL2vtmpomEMWYq15hyY8qrt17ba0vixMjldiJjqIh0=; b=UPsO7ENzlBIh22YGdcapcZhXJmcgTkScKcxmclWufKFqLm/4Df89ffmhjVMuNgpP5d nKBTN5lQK082ZEPZKNTeIZ4KmgKXaozQkqvw4JyPOSN1JEHRIzV4fWu18B9KWikY8H1R gfLeksjU6F+HRGnmTCPKy5KbRXTdiCXyOKtoBpJj+BAvnCsys0FdJw6HyEdAcnZlj6B4 6xaLwKi1G+cXhofq5x0hyGkTkCb2vLq18kTCQfPlWLsTT7t9RvH1P2O84qrRA8v81SMa 1l0NYQItsOLJxer8c2MYRF7NEwCnlY+lt2Q+hS7lEH2DuSKZVnn0YNkxM9WBx1V9dV+3 FK3Q== X-Gm-Message-State: APjAAAXagtTFygyW/OBeDU/Dvp3/L83tkaeEsftoYd/cZ4F0qLdfwjjG 9+Lngp3hoPc8WcptDrjqBCEXENT/ X-Google-Smtp-Source: APXvYqw+3mdzHrC5Ch31nNcGVAY2iZxpA8kKmdlfklNKRKI5jEzYjkEzQYO4Er0AvtBQAx83q4xrsg== X-Received: by 2002:a17:90a:1c1:: with SMTP id 1mr10856288pjd.72.1562137085983; Tue, 02 Jul 2019 23:58:05 -0700 (PDT) Received: from [10.207.113.118] ([202.45.12.164]) by smtp.gmail.com with ESMTPSA id u21sm2358433pfm.70.2019.07.02.23.58.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Jul 2019 23:58:04 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: Satoru Matsushima In-Reply-To: Date: Wed, 3 Jul 2019 15:58:02 +0900 Content-Transfer-Encoding: quoted-printable Message-Id: <6C1C7107-3E41-43C0-A232-7F20D57EF38A@gmail.com> References: To: SPRING WG List X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 06:58:11 -0000 Hi, I support this adoption. --satoru > 2019/06/27 15:13=E3=80=81Rob Shakir = =E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:= >=20 > Hi SPRING WG, >=20 > This email initiates a two week working group adoption call for = draft-xuclad-spring-sr-service-programming. This follows the discussion = that we had in the last few IETF meetings, and particularly the focused = discussion we had at IETF 104 regarding service chaining and SPRING. >=20 > Please indicate your support, comments, or objections for adopting = this draft by Wednesday July 10th, 2019. We are particularly interested = in hearing from WG members who are not authors of this draft, and those = folks that are willing to spend time working on this draft after = adoption. >=20 > We are also looking for volunteers who can provide a technical review = of the content of the draft at a later stage of its progress through the = working group (e.g., before WGLC). >=20 > In parallel - we'll send an IPR poll to the working group and authors. = The currently disclosed IPR can be found in the datatracker. >=20 > Thanks! > Rob & Bruno. > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Wed Jul 3 00:33:48 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E03B61201CF for ; Wed, 3 Jul 2019 00:33:46 -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 sEzZA58FdjM0 for ; Wed, 3 Jul 2019 00:33:44 -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 BA7921201CE for ; Wed, 3 Jul 2019 00:33:44 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 2FF06AEAAFA66C7650BF for ; Wed, 3 Jul 2019 08:33:43 +0100 (IST) Received: from DGGEMM403-HUB.china.huawei.com (10.3.20.211) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 3 Jul 2019 08:33:42 +0100 Received: from DGGEMM532-MBX.china.huawei.com ([169.254.7.174]) by DGGEMM403-HUB.china.huawei.com ([10.3.20.211]) with mapi id 14.03.0439.000; Wed, 3 Jul 2019 15:31:58 +0800 From: Lizhenbin To: SPRING WG List Thread-Topic: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming Thread-Index: AQHVLK+8q+MVDoXK+0qcVZ4XdY8Z2Ka3+dQAgACOjWY= Date: Wed, 3 Jul 2019 07:31:58 +0000 Message-ID: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8F6264AD@DGGEMM532-MBX.china.huawei.com> References: , <6C1C7107-3E41-43C0-A232-7F20D57EF38A@gmail.com> In-Reply-To: <6C1C7107-3E41-43C0-A232-7F20D57EF38A@gmail.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.153.183.149] Content-Type: text/plain; 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Wed, 3 Jul 2019 08:42:53 +0100 Received: from lhreml709-chm.china.huawei.com (10.201.108.58) by lhreml709-chm.china.huawei.com (10.201.108.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Wed, 3 Jul 2019 08:42:53 +0100 Received: from DGGEMM421-HUB.china.huawei.com (10.1.198.38) by lhreml709-chm.china.huawei.com (10.201.108.58) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P256) id 15.1.1713.5 via Frontend Transport; Wed, 3 Jul 2019 08:42:53 +0100 Received: from DGGEMM532-MBX.china.huawei.com ([169.254.7.174]) by dggemm421-hub.china.huawei.com ([10.1.198.38]) with mapi id 14.03.0439.000; Wed, 3 Jul 2019 15:41:14 +0800 From: Lizhenbin To: Rob Shakir , SPRING WG List Thread-Topic: [spring] WG Adoption Call: draft-guichard-spring-nsh-sr Thread-Index: AQHVLK+zx8LzSzskn0u+NXWdQLkfUKa4iz4G Date: Wed, 3 Jul 2019 07:41:14 +0000 Message-ID: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8F6264DE@DGGEMM532-MBX.china.huawei.com> 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: [10.153.183.149] Content-Type: multipart/alternative; boundary="_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8F6264DEDGGEMM532MBXchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] =?gb2312?b?tPC4tDogIFdHIEFkb3B0aW9uIENhbGw6IGRyYWZ0LWd1?= =?gb2312?b?aWNoYXJkLXNwcmluZy1uc2gtc3I=?= X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 07:43:01 -0000 --_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8F6264DEDGGEMM532MBXchi_ Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 SSBzdXBwb3J0IHRoZSBhZG9wdGlvbi4gVGhlIHNvbHV0aW9uIGNhbiBiZSB1c2VkIGZvciBzb21l IGltcG9ydGFudCBhcHBsaWNhdGlvbiBzY2VuYXJpb3MgY29tYmluaW5nIHdpdGggU1IgYW5kIE5T SCBhbmQgdGhlIGRyYWZ0IGhhcyBiZWVuIGRpc2N1c3NlZCBmb3IgYSBsb25nIHRpbWUuDQoNCg0K DQpCZXN0IFJlZ2FyZHMsDQoNClpoZW5iaW4gKFJvYmluKQ0KDQoNCg0KDQoNCg0KDQoNCg0KDQoN Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQq3orz+yMs6IHNwcmluZyBbc3ByaW5n LWJvdW5jZXNAaWV0Zi5vcmddILT6se0gUm9iIFNoYWtpciBbcm9ianM9NDBnb29nbGUuY29tQGRt YXJjLmlldGYub3JnXQ0Kt6LLzcqxvOQ6IDIwMTnE6jbUwjI3yNUgMTQ6MTMNCsrVvP7IyzogU1BS SU5HIFdHIExpc3QNCtb3zOI6IFtzcHJpbmddIFdHIEFkb3B0aW9uIENhbGw6IGRyYWZ0LWd1aWNo YXJkLXNwcmluZy1uc2gtc3INCg0KSGkgU1BSSU5HIFdHLA0KDQpUaGlzIGVtYWlsIGluaXRpYXRl cyBhIHR3byB3ZWVrIHdvcmtpbmcgZ3JvdXAgYWRvcHRpb24gY2FsbCBmb3IgZHJhZnQtZ3VpY2hh cmQtc3ByaW5nLW5zaC1zci4gVGhpcyBmb2xsb3dzIHRoZSBkaXNjdXNzaW9uIHRoYXQgd2UgaGFk IGluIHRoZSBsYXN0IGZldyBJRVRGIG1lZXRpbmdzLCBhbmQgcGFydGljdWxhcmx5IHRoZSBmb2N1 c2VkIGRpc2N1c3Npb24gd2UgaGFkIGF0IElFVEYgMTA0IHJlZ2FyZGluZyBzZXJ2aWNlIGNoYWlu aW5nIGFuZCBTUFJJTkcuDQoNClBsZWFzZSBpbmRpY2F0ZSB5b3VyIHN1cHBvcnQsIGNvbW1lbnRz LCBvciBvYmplY3Rpb25zIGZvciBhZG9wdGluZyB0aGlzIGRyYWZ0IGJ5IFdlZG5lc2RheSBKdWx5 IDEwdGgsIDIwMTkuLiBXZSBhcmUgcGFydGljdWxhcmx5IGludGVyZXN0ZWQgaW4gaGVhcmluZyBm cm9tIFdHIG1lbWJlcnMgd2hvIGFyZSBub3QgYXV0aG9ycyBvZiB0aGlzIGRyYWZ0LCBhbmQgdGhv c2UgZm9sa3MgdGhhdCBhcmUgd2lsbGluZyB0byBzcGVuZCB0aW1lIHdvcmtpbmcgb24gdGhpcyBk cmFmdCBhZnRlciBhZG9wdGlvbi4NCg0KV2UgYXJlIGFsc28gbG9va2luZyBmb3Igdm9sdW50ZWVy cyB3aG8gY2FuIHByb3ZpZGUgYSB0ZWNobmljYWwgcmV2aWV3IG9mIHRoZSBjb250ZW50IG9mIHRo ZSBkcmFmdCBhdCBhIGxhdGVyIHN0YWdlIG9mIGl0cyBwcm9ncmVzcyB0aHJvdWdoIHRoZSB3b3Jr aW5nIGdyb3VwIChlLmcuLCBiZWZvcmUgV0dMQykuDQoNCkluIHBhcmFsbGVsIC0gd2UnbGwgc2Vu ZCBhbiBJUFIgcG9sbCB0byB0aGUgd29ya2luZyBncm91cCBhbmQgYXV0aG9ycy4gVGhlIGN1cnJl bnRseSBkaXNjbG9zZWQgSVBSIGNhbiBiZSBmb3VuZCBpbiB0aGUgZGF0YXRyYWNrZXI8aHR0cHM6 Ly9kYXRhdHJhY2tlci5pZXRmLm9yZy9pcHIvc2VhcmNoLz9zdWJtaXQ9ZHJhZnQmaWQ9ZHJhZnQt Z3VpY2hhcmQtc3ByaW5nLW5zaC1zcj4uDQoNClRoYW5rcyENClJvYiAmIEJydW5vLg0KDQoNCg== --_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8F6264DEDGGEMM532MBXchi_ Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable

I support the adoption. The solution can be used for some important appl= ication scenarios combining with SR and NSH and the draft has been discusse= d for a long time.

 

Best Regards,

Zhenbin (Robin)

 

 

 

 

 

=B7=A2=BC=FE=C8=CB: spring [spring-bounces= @ietf.org] =B4=FA=B1=ED Rob Shakir [robjs=3D40google.com@dmarc.ietf.org] =B7=A2=CB=CD=CA=B1=BC=E4: 2019=C4=EA6=D4=C227=C8=D5 14:13
=CA=D5=BC=FE=C8=CB: SPRING WG List
=D6=F7=CC=E2: [spring] WG Adoption Call: draft-guichard-spring-nsh-s= r

Hi SPRING WG,

This email initiates a two week working group adoption call for draft-g= uichard-spring-nsh-sr. This follows the discussion that we had in the last = few IETF meetings, and particularly the focused discussion we had at IETF 104 regarding service chaining and S= PRING.

Please indicate your support, comments, or objections for adopting this= draft by Wednesday July 10th, 2019.. We are particularly interested in h= earing from WG members who are not authors of this draft, and those folks t= hat are willing to spend time working on this draft after adoption.

We are also looking for volunteers who can provide a technical review o= f the content of the draft at a later stage of its progress through the wor= king group (e.g., before WGLC).

In parallel - we'll send an IPR poll to the working group and authors. = The currently disclosed IPR can be found in the datatracker.

Thanks!
Rob & Bruno.


--_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8F6264DEDGGEMM532MBXchi_-- From nobody Wed Jul 3 02:05:12 2019 Return-Path: X-Original-To: spring@ietf.org Delivered-To: spring@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id B87A81201DD; Wed, 3 Jul 2019 02:05:04 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: spring@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.98.1 Auto-Submitted: auto-generated Precedence: bulk Reply-To: spring@ietf.org Message-ID: <156214470465.14785.6018561745114559336@ietfa.amsl.com> Date: Wed, 03 Jul 2019 02:05:04 -0700 Archived-At: Subject: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-01.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 09:05:05 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Source Packet Routing in Networking WG of the IETF. Title : SRv6 Network Programming Authors : Clarence Filsfils Pablo Camarillo Garvia John Leddy Daniel Voyer Satoru Matsushima Zhenbin Li Filename : draft-ietf-spring-srv6-network-programming-01.txt Pages : 41 Date : 2019-07-03 Abstract: This document describes the SRv6 network programming concept and its most basic functions. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-spring-srv6-network-programming/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-spring-srv6-network-programming-01 https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-network-programming-01 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-srv6-network-programming-01 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. 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X-Mimecast-Spam-Score: 0 Content-Type: multipart/alternative; boundary="_000_DBBPR03MB54159C3783141F20DE56D375EEFB0DBBPR03MB5415eurp_" Archived-At: Subject: Re: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-01.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 14:10:25 -0000 --_000_DBBPR03MB54159C3783141F20DE56D375EEFB0DBBPR03MB5415eurp_ Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Dear Authors, I've read through this draft with some interest - and it would be remiss of= me not to express severe reservations to something that modified packet he= aders in the manner described. As such, I've got a couple of questions. 1. What effect will this have on flow analysis if a packet is arriving w= ith a modified DA - that is going to subsequently change 2. What effect will this have on inline systems that draw information fr= om both the SA and DA addresses (think DPI systems) 3. I have significant concerns that the utilization of an IPv6 address i= n the manner described here could have under unintended and as of yet unkno= wn consequences. As an example, if filtering is done based on destination = address, does it not stand to reason that you create an attack vector by al= lowing an extended next-hop header to programmatically change that which is= being filtered on, on the preceding hop. (Yes this is highly theoretical,= but - I'd like to hear the authors comments on this) Looking forward to the response Yours Sincerely Andrew Alston From: spring On Behalf Of internet-drafts@ietf.or= g Sent: Wednesday, 3 July 2019 12:05 To: i-d-announce@ietf.org Cc: spring@ietf.org Subject: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-01= .txt A New Internet-Draft is available from the on-line Internet-Drafts director= ies. This draft is a work item of the Source Packet Routing in Networking WG of = the IETF. Title : SRv6 Network Programming Authors : Clarence Filsfils Pablo Camarillo Garvia John Leddy Daniel Voyer Satoru Matsushima Zhenbin Li Filename : draft-ietf-spring-srv6-network-programming-01.txt Pages : 41 Date : 2019-07-03 Abstract: This document describes the SRv6 network programming concept and its most basic functions. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-spring-srv6-network-programming= / There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-spring-srv6-network-programming-01 https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-network-progra= mming-01 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-spring-srv6-network-programm= ing-01 Please note that it may take a couple of minutes from the time of submissio= n until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ _______________________________________________ spring mailing list spring@ietf.org https://www.ietf.org/mailman/listinfo/spring --_000_DBBPR03MB54159C3783141F20DE56D375EEFB0DBBPR03MB5415eurp_ Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable

Dear Authors,

 

I’ve read through this draft with some interest – and it = would be remiss of me not to express severe reservations to something that = modified packet headers in the manner described.

 

As such, I’ve got a couple of questions.

 

  1. What effect= will this have on flow analysis if a packet is arriving with a modified DA= – that is going to subsequently change
  2. <= span lang=3D"EN-US" style=3D"mso-fareast-language:EN-US">What effect will t= his have on inline systems that draw information from both the SA and DA ad= dresses (think DPI systems)
  3. I have significant concerns that the= utilization of an IPv6 address in the manner described here could have und= er unintended and as of yet unknown consequences.  As an example, if filtering is done = based on destination address, does it not stand to reason that you create a= n attack vector by allowing an extended next-hop header to programmatically= change that which is being filtered on, on the preceding hop.  (Yes this is highly theoretical, but ̵= 1; I’d like to hear the authors comments on this)

 

Looking forward to the response

 

Yours Sincerely

 

Andrew Alston

 

From: spring <spring-bounces@ietf.org> On Behalf Of internet-drafts@ietf.org
Sent: Wednesday, 3 July 2019 12:05
To: i-d-announce@ietf.org
Cc: spring@ietf.org
Subject: [spring] I-D Action: draft-ietf-spring-srv6-network-program= ming-01.txt

 


A New Internet-Draft is available from the on-line Internet-Drafts director= ies.
This draft is a work item of the Source Packet Routing in Networking WG of = the IETF.

Title : SRv6 Network Programming
Authors : Clarence Filsfils
Pablo Camarillo Garvia
John Leddy
Daniel Voyer
Satoru Matsushima
Zhenbin Li
Filename : draft-ietf-spring-srv6-network-programming-01.txt
Pages : 41
Date : 2019-07-03

Abstract:
This document describes the SRv6 network programming concept and its
most basic functions.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-srv6-netwo= rk-programming/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-srv6-network-progr= amming-01
https://datatracker.ietf.org/doc/html/draft-ietf-sprin= g-srv6-network-programming-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-spring-sr= v6-network-programming-01


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

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

_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.o= rg/mailman/listinfo/spring

--_000_DBBPR03MB54159C3783141F20DE56D375EEFB0DBBPR03MB5415eurp_-- From nobody Wed Jul 3 07:35:10 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0948D120075 for ; Wed, 3 Jul 2019 07:35:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mu0RvH8rlo0z for ; Wed, 3 Jul 2019 07:35:05 -0700 (PDT) Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) (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 8AB441200B7 for ; Wed, 3 Jul 2019 07:35:05 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id u17so869194pgi.6 for ; Wed, 03 Jul 2019 07:35:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=ljHx8OoqeLv1B9fV6Orddq/iXIdc+8fgpwLFf5gLwv4=; b=BLUoJNo98TxuupwUlwsE+PjkfezSNn0lMmfF7ITp7kPgUzUZyBy4es3xLzR/4E19xd SYiOUBzICAl5+QYIyDYrUWfZUYjizdcCIdhj7vsaYBbhPRZBMWbzxXi3k8u9RBn5CyO4 iIMR/uvBgw/sVgYjBXaiv/7hTPgdDWDd2Gq1tJaBW3+zW+QK+uLVeSw0axUgT9VsDCVf t3Q2vPs8DA69ZmkBaoj1tCTKSezY2qoCuYji60yXVvWyKo1Ux19qDAJ3aUq34zULi3ab cpEK7w+d6XHj8Bqy97e4Btt0orm7xNS/9IQHoYXc+TMOkRA5LRL/SIbqHuwP3GY10SKK MyAw== 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=ljHx8OoqeLv1B9fV6Orddq/iXIdc+8fgpwLFf5gLwv4=; b=ojg8PH0PB3H3Cvb6ACFeaCf8e7HSpq0gxSNyWG23Q5/s+gm1WEnDEATS0MDRNFiTTJ jYS3zOv0pEivOVFuwmwK0GM2gdFhiV/1kIqqQTkVHJYvv9EdnNLWl/UjnT2cBSWYA15r YsD+GoTpabYidmX5rTu7Rr2hfWX+xpZVakjzFsmBxbEsCDgRVzJYNWvGvROgcCnzuy5Z Y4qXFhwVDsA7A0bYW3Evn5941PErik30Ag9S7Lx8bjQR5SM7hB712jO2ehdzHggnRWUG ogCxrKpECtVl8wCS8BktzDQxU83noiFjgKUPyNUXlaG33PivXl21eCTGQtDThlVpakUs ixMg== X-Gm-Message-State: APjAAAXs/imb8ynXmUgKIVC6P+HwRdlfL5QGGwZrxNqyuhH7YDx7hDek ABk3yol6O4tL4keVPlqOOZMElNwagA9/6dE6LGWv3HGRfSg= X-Google-Smtp-Source: APXvYqwE3N2XvzhO4E5Js/a8qvBnUveakzaWTk7Ju5i44TX91ihM/Uzt/xGKaDtZyEwQF3eQx33zV8QrHes2EbfdCuE= X-Received: by 2002:a17:90a:c596:: with SMTP id l22mr13404686pjt.46.1562164504675; Wed, 03 Jul 2019 07:35:04 -0700 (PDT) MIME-Version: 1.0 References: <156214470465.14785.6018561745114559336@ietfa.amsl.com> In-Reply-To: From: Robert Raszuk Date: Wed, 3 Jul 2019 16:34:51 +0200 Message-ID: To: Andrew Alston Cc: "spring@ietf.org" Content-Type: multipart/alternative; boundary="00000000000061c8d3058cc7c4fe" Archived-At: Subject: Re: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-01.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 14:35:08 -0000 --00000000000061c8d3058cc7c4fe Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Andrew, As just a little contributor to the spec let me provide my own personal view point. Please kindly see inline ... > 1. What effect will this have on flow analysis if a packet is arriving > with a modified DA =E2=80=93 that is going to subsequently change > > Flow analysis needs to recognize complete packet header (when ultimate packet DST resides) to calculate the truth about end to end flows. Sure it will take some time to build support around it, but this is nothing new. When you UDP ir GRE tunnel around some flows you have the same issue. See it took some time to perform decent flow analysis for MPLS packets. Frankly if I look at linux kernel even today there is no efficient support for hashing to multiple buffers from header above IP - so each time I need to get packet headers to my flow analysis software I need to add few lines and rebuild the kernel. Patch has been proposed long time back but it seems kernel maintainers do not understands the problem. > > 1. > 2. What effect will this have on inline systems that draw information > from both the SA and DA addresses (think DPI systems) > > Same answer as above. > 1. > 2. I have significant concerns that the utilization of an IPv6 address > in the manner described here could have under unintended and as of yet > unknown consequences. As an example, if filtering is done based on > destination address, does it not stand to reason that you create an at= tack > vector by allowing an extended next-hop header to programmatically cha= nge > that which is being filtered on, on the preceding hop. (Yes this is h= ighly > theoretical, but =E2=80=93 I=E2=80=99d like to hear the authors commen= ts on this) > > It is trivial issue. You match on the DST in the SRH if different from your packet's outer header DST field. See in general network programmability is not an easy concept. It is almost like monolith linux kernal vs dynamically loadable modular one. There was huge resistance when this got introduced, but flexibility behind it won. Same for networking in general. See few years back Nick and his team rolled out OF. Well the mistake they did was the centralized approach and programming way too much to each network element. Proposed SRv6 NP is a new concept and likely it will take years to fully adopt and see blossom of its power - but even now at such early stage you can see islands benefiting from it already at some focused areas (5G rollouts). Yes I understand that as author of SRv6+ you want to save the legacy ASICs and keep the packet headers as small as possible - keeping programmability to the endpoints. Well if so I really see no reason why instead of this new SRv6+ proposal we eliminate overhead to zero yet allow flexible traffic steering with BGP Vector Routing as described here: https://tools.ietf.org/html/draft-patel-raszuk-bgp-vector-routing-07 Many thx, Robert --00000000000061c8d3058cc7c4fe Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Andrew,

As just a little contributor to t= he spec let me provide my own personal view point.=C2=A0

Please kindly see inline ...=C2=A0
=

  1. What effect will this have on f= low analysis if a packet is arriving with a modified DA =E2=80=93 that is g= oing to subsequently change
<= div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif= ;font-size:small">Flow analysis needs to recognize complete packet header (= when ultimate packet DST resides) to calculate the truth about end to end f= lows. Sure it will take some time to build support around it, but this is n= othing new. When you UDP ir GRE tunnel around some flows you have the same = issue. See it took some time to perform decent flow analysis for MPLS packe= ts. Frankly if I look at linux kernel even today there is no efficient supp= ort for hashing to multiple buffers from header above IP - so each time I n= eed to get packet headers to my flow analysis software I need to add few li= nes and rebuild the kernel. Patch has been proposed long time back but it s= eems kernel maintainers do not understands the problem.=C2=A0
=C2=A0
  2. What eff= ect will this have on inline systems that draw information from both the SA= and DA addresses (think DPI systems)

Same answer as above.


  2. I hav= e significant concerns that the utilization of an IPv6 address in the manne= r described here could have under unintended and as of yet unknown consequences.=C2=A0 As an example, if filtering is done = based on destination address, does it not stand to reason that you create a= n attack vector by allowing an extended next-hop header to programmatically= change that which is being filtered on, on the preceding hop.=C2=A0 (Yes this is highly theoretical, but =E2= =80=93 I=E2=80=99d like to hear the authors comments on this)

It is tr= ivial issue. You match on the DST in the SRH if different from your packet&= #39;s outer header DST field.


See in general network programmability is not an easy concept. It= is almost like monolith linux kernal vs dynamically loadable modular one. = There was huge resistance when this got introduced, but flexibility behind = it won.=C2=A0

Same for= networking in general. See few years back Nick and his team rolled out OF.= Well the mistake they did was the centralized approach and programming way= too much to each network element.=C2=A0

=
Proposed SRv6 NP is a new concept and likely it will tak= e years to fully adopt and see blossom of its power - but even now at such = early stage you can see islands benefiting from it already at some focused = areas (5G rollouts).=C2=A0

Yes I understand that as author of SRv6+ you want to save the legacy A= SICs and keep the packet headers as small as possible - keeping programmabi= lity to the endpoints. Well if so I really see no reason why instead of thi= s new SRv6+ proposal we eliminate overhead to zero yet allow flexible traff= ic steering with BGP Vector Routing as described here:=C2=A0=C2=A0https://tools.ietf.org/html= /draft-patel-raszuk-bgp-vector-routing-07

<= /div>
Many thx,
Robert

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Wed, 03 Jul 2019 07:57:55 -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=fl86ntNYzt7J8FQJSEIOHg4WeCDR4TT7Y7lmKhBZOKg=; b=O8Y/UV8rpnhb9u2Kq9xWhiRHA7Z2naVD1FZEBJx1B2cFevxTl+Ug83ikAVzkyG11OI Oznqwth2qBiF/YvJKp4bi9XO7EaeIGBhB4eu5b9EEwHOsr7n4mkfikxMSDYDXZ4CAMBH hAgLy7OVR300uOsRP74pOcba537MuUPiU12Vhhct8+4FzdM5rC4tYQ7Ehr2rOJBjK8M3 eurDXGHtVjRwcFqgE6HTasS9JN2ck3J7IUJXIaf2jOSqoF1TZhySmqUokH+Xzj+jJPE3 vILQTderC7scfG9RPb/GVkDwhCsU8Cv/nJmqe/x35pxbAot02LzMmDxh2/tnSo8E5JsH QEUw== 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=fl86ntNYzt7J8FQJSEIOHg4WeCDR4TT7Y7lmKhBZOKg=; b=ZdwMLtc4yesruBfWzu3on9DBW1zDY3ja2nyWwDh3JCNWJjLsZivq2TNFIO/IsEpCar 7jkhDmubw+n0ZKTQFd2l1om79JxyTLKgraYiwheeZGa4PgbNXl4snw83+Cip6rhbLrVS hLmFv4BsRGDwzrqQQNuCqV1WiNJMi7Tvtt28BYwUNcEmbjRe+ZX6jwnSZfh02cLjXvkf rbAN0TfUh5XD+pLQ/oyihixJpvreG2r032Mg1ccCRFBjOh0e4l17/StGySsaUs1mOM3O QkjtzVP0n3HMCbaHrlv34y2rDXmgHy3+2iM4meeLfnkIxmdc+ehrlA+K64aQHeeyLrKA SYRQ== X-Gm-Message-State: APjAAAXxCkODwvPN0EvN5fnK+sml/H5funJWZ6jRFr+8boOEx7yJBzbh ky2pVfJ5K0f7CGKlqUxCN4Q4V9TNX8cyAX76tLrvZg== X-Google-Smtp-Source: APXvYqz3T0M6OlZRtnQKsiK7XD/1tb31e+czH/oiMcCz0QK8juzcHi0Pg1EW2JeEjV8P8zXED5Kr3FHoIJ36TTP3Lw4= X-Received: by 2002:a17:90a:c596:: with SMTP id l22mr13517646pjt.46.1562165874226; Wed, 03 Jul 2019 07:57:54 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Robert Raszuk Date: Wed, 3 Jul 2019 16:57:40 +0200 Message-ID: To: Rob Shakir Cc: SPRING WG List Content-Type: multipart/alternative; boundary="000000000000037afa058cc8166f" Archived-At: Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 14:58:05 -0000 --000000000000037afa058cc8166f Content-Type: text/plain; charset="UTF-8" Support. On Thu, Jun 27, 2019 at 8:15 AM Rob Shakir wrote: > Hi SPRING WG, > > This email initiates a two week working group adoption call for > draft-xuclad-spring-sr-service-programming. This follows the discussion > that we had in the last few IETF meetings, and particularly the focused > discussion we had at IETF 104 regarding service chaining and SPRING. > > Please indicate your support, comments, or objections for adopting this > draft by *Wednesday July 10th, 2019.* We are particularly interested in > hearing from WG members who are not authors of this draft, and those folks > that are willing to spend time working on this draft after adoption. > > We are also looking for volunteers who can provide a technical review of > the content of the draft at a later stage of its progress through the > working group (e.g., before WGLC). > > In parallel - we'll send an IPR poll to the working group and authors. The > currently disclosed IPR can be found in the datatracker > > . > > Thanks! > Rob & Bruno. > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --000000000000037afa058cc8166f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Support.=C2=A0

On Thu, Jun 27, 201= 9 at 8:15 AM Rob Shakir <robjs=3D40google.com@dmarc.ietf.org> wrote:
Hi SPRING WG,

This email initiates a two week working group adoption= call for draft-xuclad-spring-sr-service-programming. This follows the disc= ussion that we had in the last few IETF meetings, and particularly the focu= sed discussion we had at IETF 104 regarding service chaining and SPRING.

Plea= se indicate your support, comments, or objections for adopting this draft b= y Wednesday July 10th, 2019.=C2=A0We are particularly interested in = hearing from WG members who are not authors of this draft, and those folks = that are willing to spend time working on this draft after adoption.
<= div class=3D"gmail_default">
We are a= lso looking for volunteers who can provide a technical review of the conten= t of the draft at a later stage of its progress through the working group (= e.g., before WGLC).

In parallel - we'll send an IPR poll to the working = group and authors. The currently disclosed IPR can be found in the=C2=A0datatracker= .

= Thanks!
Rob & Bruno.
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
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Malis" CC: SPRING WG , 6man WG Thread-Topic: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-00.txt Thread-Index: AQHVMH2w8Tg91+MCKk6WLpDCO4NLBqa2m76AgACR6QCAAftsUA== Content-Class: Date: Wed, 3 Jul 2019 17:32:14 +0000 Message-ID: References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.2.0.14 dlp-reaction: no-action x-mcafeedlp-tagged: True msip_labels: MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Enabled=True; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SiteId=bea78b3c-4cdb-4130-854a-1d193232e5f4; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Owner=rbonica@juniper.net; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SetDate=2019-07-03T17:32:12.8523229Z; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Name=Juniper Business Use Only; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Application=Microsoft Azure Information Protection; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_ActionId=d87dd4da-490d-4a69-933e-21a48e808954; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Extended_MSFT_Method=Automatic x-originating-ip: [66.129.241.14] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e990d010-e115-4cdb-81cd-08d6ffdc6340 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020); SRVR:BYAPR05MB6198; x-ms-traffictypediagnostic: BYAPR05MB6198: x-ms-exchange-purlcount: 8 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:446; x-forefront-prvs: 00872B689F x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(376002)(346002)(39860400002)(396003)(366004)(136003)(189003)(13464003)(199004)(186003)(7736002)(6436002)(2420400007)(66476007)(6306002)(55016002)(15650500001)(53936002)(54896002)(236005)(74316002)(54906003)(9326002)(66556008)(9686003)(66446008)(64756008)(68736007)(26005)(1411001)(14444005)(256004)(66574012)(25786009)(53546011)(6506007)(102836004)(478600001)(229853002)(99286004)(33656002)(7696005)(66946007)(316002)(4326008)(446003)(11346002)(76176011)(76116006)(71200400001)(73956011)(476003)(14454004)(81166006)(81156014)(966005)(5660300002)(606006)(66066001)(6916009)(486006)(6116002)(3846002)(71190400001)(790700001)(86362001)(7110500001)(8676002)(8936002)(2906002)(6246003)(52536014); DIR:OUT; SFP:1102; SCL:1; SRVR:BYAPR05MB6198; H:BYAPR05MB4245.namprd05.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: juniper.net does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: Plooe2sd8h8Fr9QPjpW1jJUJ1lqw+B3/afzt9aZ9pqEfg9xYMsuRCee+Xie/dYm2HqJgeXHxqL6X6RG/xpaaiXsKqSPvOdxGrGdcnAmnrE9spb9Mpq9F+4NrC0iz7IYD3k2alMUkya4aeieVFytwrsq/WBw6kexj/QBNuujfyDEvMy1kjatJBEoQEi2dQ34Gt73nx0Pf4NP2rt4tGaZk+lGZlAhLXaQC/TVDsYDawJVk6OJcqSydoWkeD7wRORO2ST2Oqx5ObCkT9pe3bHEQYsKma4RIyHpcIZ9rvzYfROpmg/j86Nyl7qAd3fhiFg+ir8IN7UyGXFcIaRUvXvXCg3GwWin690CAWL282qphea5IM8d+IqH3HBKT5RTnXC0q17X2MXMfX72tX2A816wksdDuzocx03a5D5qORe3w8zE= Content-Type: multipart/alternative; boundary="_000_BYAPR05MB42457106F9F596D2DD8F2EB7AEFB0BYAPR05MB4245namp_" MIME-Version: 1.0 X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-Network-Message-Id: e990d010-e115-4cdb-81cd-08d6ffdc6340 X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Jul 2019 17:32:14.1574 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: rbonica@juniper.net X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR05MB6198 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-03_04:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907030212 Archived-At: Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-00.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 17:32:22 -0000 --_000_BYAPR05MB42457106F9F596D2DD8F2EB7AEFB0BYAPR05MB4245namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Andy, The draft is relevant to both working groups. So I announced it to both WGs= and will let the chairs decide where it belongs. Ron From: Andrew G. Malis Sent: Tuesday, July 2, 2019 7:15 AM To: Ron Bonica Cc: SPRING WG ; 6man WG Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-= srv6-plus-00.txt Ron, Just curious - since draft-ietf-6man-segment-routing-header is in 6man, sho= uldn't this be aimed at 6man as well? Cheers, Andy On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica > wrote: Folks, Please review this draft and comment. Ron Juniper Business Use Only -----Original Message----- From: internet-drafts@ietf.org > Sent: Monday, July 1, 2019 10:27 PM To: Ron Bonica >; Andrew Al= ston >; Joel Halpern >; Andrew Alston >; Daniam Henriques >; Jen Linkova >; Yuji Kamite > Subject: New Version Notification for draft-bonica-spring-srv6-plus-00.txt A new version of I-D, draft-bonica-spring-srv6-plus-00.txt has been successfully submitted by Ron Bonica and posted to the IETF reposi= tory. Name: draft-bonica-spring-srv6-plus Revision: 00 Title: IPv6 Support for Segment Routing: SRv6+ Document date: 2019-07-01 Group: Individual Submission Pages: 23 URL: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.= ietf..org_internet-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&= d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-= BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5= Fo5I&s=3Df9eRsPzrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&e=3D Status: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__data= tracker.ietf.org_doc_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus_&d=3DDwICaQ&c=3D= HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AW= F2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeeP= VTP8VTbcR4Tpnv_hZo97c6qRVc8ZNPyfEDugA&e=3D Htmlized: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tool= s.ietf.org_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00&d=3DDwICaQ&c=3DH= AkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF= 2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9= JYjduX8ZtyCxs49VG31Ijs5p6Dmz6ka7JDQ4&e=3D Htmlized: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__data= tracker.ietf.org_doc_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus&d=3DDwICaQ&= c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKw= l-AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Y= a6wV9Pug7Yh-vebYFvEsuuY9vpaA9dKNmD6egK8yM&e=3D Abstract: This document describes SRv6+. SRv6+ is a Segment Routing (SR) solution that leverages IPv6. It supports a wide variety of use- cases while remaining in strict compliance with IPv6 specifications. SRv6+ is optimized for for ASIC-based forwarding devices that operate at high data rates. 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 _______________________________________________ spring mailing list spring@ietf.org https://www.ietf.org/mailman/listinfo/spring Juniper Business Use Only --_000_BYAPR05MB42457106F9F596D2DD8F2EB7AEFB0BYAPR05MB4245namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Andy,

 

The draft is relevant to both working groups. So I a= nnounced it to both WGs and will let the chairs decide where it belongs.

 

        &nbs= p;             =             &nb= sp;            =            Ron<= /o:p>

 

From: Andrew G. Malis <agmalis@gmail.com&g= t;
Sent: Tuesday, July 2, 2019 7:15 AM
To: Ron Bonica <rbonica@juniper.net>
Cc: SPRING WG <spring@ietf.org>; 6man WG <ipv6@ietf.org>=
Subject: Re: [spring] FW: New Version Notification for draft-bonica-= spring-srv6-plus-00.txt

 

Ron,

 

Just curious - since draft-ietf-6man-segment-ro= uting-header is in 6man, shouldn't this be aimed at 6man as well?

 

Cheers,

Andy

 

 

On Mon, Jul 1, 2019 at 10:33 PM Ron Bonica <rboni= ca=3D40juniper.net@dmarc.ie= tf.org> wrote:

Folks,

Please review this draft and comment.

                     = ;              Ron



Juniper Business Use Only

-----Original Message-----
From: interne= t-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Monday, July 1, 2019 10:27 PM
To: Ron Bonica <rbonica@juniper.net>; Andrew Alston <Andrew.Alston@liquidtelecom.com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew.alston@liquidtelecom.com>; Daniam Henriques <= dan= iam.henriques@liquidtelecom.com>; Jen Linkova <furry@google.com= >; Yuji Kamite <y.kamite@ntt.com>
Subject: New Version Notification for draft-bonica-spring-srv6-plus-00.txt<= br>

A new version of I-D, draft-bonica-spring-srv6-plus-00.txt
has been successfully submitted by Ron Bonica and posted to the IETF reposi= tory.

Name:           draft-bonica-spring-srv6-plus=
Revision:       00
Title:          IPv6 Support for Segment Routing: = SRv6+
Document date:  2019-07-01
Group:          Individual Submission
Pages:          23
URL:            https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf..org_intern= et-2Ddrafts_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D00.txt&d=3DDwICaQ&a= mp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx= 84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5= Fo5I&s=3Df9eRsPzrKToGvL0_wpMx9GAiF85cBkn2my6nyMx5_3c&e=3D
Status:         https://urldefense.proofpoin= t.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc_draft-2Dbonica-2Dspring= -2Dsrv6-2Dplus_&d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDT= XcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07p8d= P3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3Di5EeePVTP8VTbcR4Tpnv_hZo97c6qR= Vc8ZNPyfEDugA&e=3D
Htmlized:       https://urldefense.proofpoint.com/= v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dp= lus-2D00&d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI= &r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07p8dP3iQ-0u= 6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3DCK39cv9JYjduX8ZtyCxs49VG31Ijs5p6Dmz6k= a7JDQ4&e=3D
Htmlized:       https://urldefense.proofpoint= .com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc_html_draft-2Dbonica-2Dsp= ring-2Dsrv6-2Dplus&d=3DDwICaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3v= oDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3Dnl07= p8dP3iQ-0u6rwI1U6jjp_wqSYhsPge2Y6i5Fo5I&s=3D2Ya6wV9Pug7Yh-vebYFvEsuuY9v= paA9dKNmD6egK8yM&e=3D


Abstract:
   This document describes SRv6+. SRv6+ is a Segment Rout= ing (SR)
   solution that leverages IPv6.  It supports a wide variety= of use-
   cases while remaining in strict compliance with IPv6 specifica= tions.
   SRv6+ is optimized for for ASIC-based forwarding devices t= hat operate
   at high data rates.




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
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/= mailman/listinfo/spring

 

Juniper Business Use Only

--_000_BYAPR05MB42457106F9F596D2DD8F2EB7AEFB0BYAPR05MB4245namp_-- From nobody Wed Jul 3 11:48:46 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A4128120332 for ; Wed, 3 Jul 2019 11:48:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=herbertland-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QhH7UeOIV2Re for ; Wed, 3 Jul 2019 11:48:41 -0700 (PDT) Received: from mail-ed1-x52f.google.com (mail-ed1-x52f.google.com [IPv6:2a00:1450:4864:20::52f]) (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 88B1A1200D7 for ; Wed, 3 Jul 2019 11:48:41 -0700 (PDT) Received: by mail-ed1-x52f.google.com with SMTP id r12so3074975edo.5 for ; Wed, 03 Jul 2019 11:48:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=herbertland-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=v6vQ0b223eIaejQ56anSatq002Yi9nlkp6sIZmSnxMM=; b=qvPhJMjWwV4Ar+wozXTpN2EpHQLfq3Nh0F0yiGzMJLd27JrTeTIfWdGxBZqW5XDqHf OuWQDF/WuF0uddWJgQc0O3/W+shOsSmXrFHgaGWS2v5A/dxpVWRe4+iYMpibD/h6+M1C bsuw7rk3bKvWrrXcy7/UjJ0c4y/Fm3pg/KYx+hZEZLFZ9roiOkoAw+mioVYAo6c/SfbI 5kkMvq2WhEXE7Xm90E3Kf0dBfV15CYIZEPZBFS145uZJYnzcDFcJpbDzbYW0ZcOyRsvZ Wwt8YIvFP2odYjwPThcV+0HH4jKMCwHQ9qZokLhaQ+7xSj8lW6aPmbaGCfXVl+JsFn3X up5A== 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=v6vQ0b223eIaejQ56anSatq002Yi9nlkp6sIZmSnxMM=; b=nLYN1XiTAQYVcklPEejoiSeD71DNgkReIB5x218zaYw3Me6bhv5Co4O8WqBWMGcquc QLYzA+1Mc4BIDdU4Jgy2EITYv0WseCMb8qtxkFaOJA+9TbL0TwRyMWhbhZVmk2TWB1Iw bQPw8T/X1RNxH8zRvaHpfsLWEhUUbmAszJ4jqVoyX5X0T0PueFA11ITeqs5OyGO0nuM8 XCrsWKTI/7JByPZNjTi0smqQkaXPzeILPNbnnhUNdG21L4CvGjcts7394AjGuZOspxxK lWGn7hu67MH5F0i68g6C4DzCGrULKoGciuewgZecdGqnVF73JQk1EL9mFowuA9F1UgZS CQVw== X-Gm-Message-State: APjAAAWp0bPVQo8N7fRoJDsuHeSmm87L61S402JjCC6LVzBKHDhFeyLi rv9TMeDdS6WEE6vqZbJeYdZw+wtlZbHFwRM6xAC9cWE7 X-Google-Smtp-Source: APXvYqy79aD2byhdFTQxP5m5Np6qYlo9hYMjdoonXE6cYpJ9FoaS6rq++1Mv1sANF5Kv95teVZoaF6nsU1vSTaMPQ/s= X-Received: by 2002:a17:906:69c4:: with SMTP id g4mr36591361ejs.9.1562179719930; Wed, 03 Jul 2019 11:48:39 -0700 (PDT) MIME-Version: 1.0 References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: From: Tom Herbert Date: Wed, 3 Jul 2019 11:48:29 -0700 Message-ID: To: Ron Bonica Cc: SPRING WG , 6man WG Content-Type: text/plain; charset="UTF-8" Archived-At: Subject: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 18:48:44 -0000 Hi Ron, Thanks for the draft. I think the name SRV6+ might be a little misleading in that it could be misinterpreted as SRV6+ being a superset of SRV6. Specifically, SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so the primary function (and implementation) of SRV6 isn't compatible. It doesn't seem like it would be that much effort to allow a 128 bit SID size to be compatible. I don't understand the rationale for needing a MSV to be explictly configured throughout the domain. Couldn't the appropriate SID size be chosen by the sender at run time. For instance, if all the SIDs in a list are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are used (I assume 16 and 32 bit SIDs are in same number space). Since CRH has the bits stating the SID length there is no ambiguity at the receiver. SID compression is opportunistic and it's always good practice to avoid situations that require wide scale renumbering. Please add a section on mutability requirements of protocol fields so that there is no ambiguity. 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Wed, 03 Jul 2019 13:06:21 -0700 (PDT) MIME-Version: 1.0 References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: From: Tom Herbert Date: Wed, 3 Jul 2019 13:06:10 -0700 Message-ID: To: Ron Bonica Cc: SPRING WG , 6man WG Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2019 20:06:26 -0000 On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica wrote: > > Hi Tom, > > Thanks for the review. > > On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will contain = a section on mutability. It will say: > > - the Segments Left field is mutable > - every other field in the CRH is immutable > > I will also update draft-bonica-6man-vpn-dest-opt and draft-bonica-6man-s= eg-end-opt. Both of those request an IANA option type with the CHG bit equa= l to 0. So they are both immutable. > > SID encoding isn't entirely opportunistic. Since the last IETF, we realiz= ed that it would be burdensome for every vendor to support all three SID l= engths. So, we said that implementations MUST support 32-bit encoding and M= AY support 16 bit encoding. (We dropped 8-bit encoding entirely). This sounds dicey from an interoperability and flexibility point of view. Supposed I've deployed a network where everyone is using 16 bits SIDs. But, then for some reason I need to switch vendors for a small part of the network and their implementation doesn't support 16 bits. Do I need to up the MSV and make all SIDs to be 32 bits just on the off chance that one of the new nodes might be in some SID list? > > A side effect of this decision is that a node should only send CRH's with= 16-bit encoding every other node in the domain supports 16-bit encoding. S= o, network operators will need to configure the SID length on each node, wi= th the default being 32. Well, in light the above problem, I have to wonder if it's better to only support 32 bits. The leap from 128 bits to 32 bits is much more consequential than going from 32 to 16 bits. Other than that, it simplifies the protocol, reduces support and test matrix, ensures interoperability, etc. Tom > > = Ron > > > > Juniper Business Use Only > > -----Original Message----- > From: Tom Herbert > Sent: Wednesday, July 3, 2019 2:48 PM > To: Ron Bonica > Cc: SPRING WG ; 6man WG > Subject: Comments on draft-bonica-spring-srv6-plus > > Hi Ron, > > Thanks for the draft. > > I think the name SRV6+ might be a little misleading in that it could be m= isinterpreted as SRV6+ being a superset of SRV6. Specifically, > SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > the primary function (and implementation) of SRV6 isn't compatible. It do= esn't seem like it would be that much effort to allow a 128 bit SID size to= be compatible. > > I don't understand the rationale for needing a MSV to be explictly config= ured throughout the domain. Couldn't the appropriate SID size be chosen by = the sender at run time. For instance, if all the SIDs in a list are less th= an 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are used (I assume= 16 and 32 bit SIDs are in same number space). > Since CRH has the bits stating the SID length there is no ambiguity at th= e receiver. SID compression is opportunistic and it's always good practice = to avoid situations that require wide scale renumbering. > > Please add a section on mutability requirements of protocol fields so tha= t there is no ambiguity. > > Tom From nobody Wed Jul 3 18:07:53 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3835C12010F; Wed, 3 Jul 2019 18:07:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.497 X-Spam-Level: X-Spam-Status: No, score=-0.497 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, FROM_LOCAL_NOVOWEL=0.5, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QMG6M8u-zSfk; Wed, 3 Jul 2019 18:07:42 -0700 (PDT) Received: from mail-oi1-x22c.google.com (mail-oi1-x22c.google.com [IPv6:2607:f8b0:4864:20::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C8A751200D7; Wed, 3 Jul 2019 18:07:42 -0700 (PDT) Received: by mail-oi1-x22c.google.com with SMTP id w196so3625360oie.7; Wed, 03 Jul 2019 18:07:42 -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=XuCSZjDZkHZck6lTSRZgxr1RIvm3h7y00QznZts1SDg=; b=TCKCVnAbjAUM/yPN7ifg3XzJKeNORvzYvESUnBW44YH2pxIMCdeJo2XojLBhoe9xx0 pJwZSAKBrUpOgSWr/19t45Iyf6SAMpwfhRK/dajmaVIUx8GNDLT2y/UuVoR5VfAi1Zsx TMclgkqXTjOzqIOkVPa4w4mIG5WoZW+kkVBajNfZrpk+Yjj/GUG+AXw73moSERcc280P h4vd3ZjYGoYVgyFSar5vuEXmN3IBHSKHsIQd9y04WiqrV2oYgKsKkMiZeiw8gjvI8FCW to9MTRzlIm5pBbEZcO9kTV/F1ek0xRM+turIJQ9rjZonbpMANNkW3oYGdyoNTVTc/HHu hilw== 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=XuCSZjDZkHZck6lTSRZgxr1RIvm3h7y00QznZts1SDg=; b=N60sJWHfsZpzaMiKDzMD4hCD1wDQPVW5QCwk/vEphC7FxQ9DzcYI/fd0mPD/lmfhvy G5IpdZR5XMz8TtnzPlpy1d32Nyh5/8pt6ncTVhZIK9EurJNalU++cj5f0t5NdlK5EQrD nFEpxEibEuQTNY148EriAvnOySMldBQfL2Cq8e7hLNGugUDvXNtrVKgLmi9KHQUzmKiK x7OT0BIctpNS6WXpnqUxEAUh9GmPpqI+d5V6f8gLCtkYY6TT5IA4y+HsGTWkQISEizBD 8a/XGrAMCjYp9NKBue3FfV5dxrvVhNau7Fb7NqhLwslplUnM0sZJjZM+TvHpnAG7TUGR 995A== X-Gm-Message-State: APjAAAWMNj+4mekMUPHp7LPqHhnwKouSd7fdeBofONcPRoQ2wzRYtrpm Mtdo+P4FTsm3QpoRD9LsF5puu3Yda3KneT3rmvA= X-Google-Smtp-Source: APXvYqwYbfKgbuZZ1YRjsf4kMWOSE1DmXZGx0uPFp8evdrX17IvirjckFDZJzKFi7eMnxwbEe7PEXyFfMr8vIpr7y08= X-Received: by 2002:aca:c584:: with SMTP id v126mr330212oif.60.1562202462018; Wed, 03 Jul 2019 18:07:42 -0700 (PDT) MIME-Version: 1.0 References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: From: Mark Smith Date: Thu, 4 Jul 2019 11:07:30 +1000 Message-ID: To: Tom Herbert Cc: Ron Bonica , SPRING WG , 6man WG Content-Type: multipart/alternative; boundary="000000000000d0e81b058cd09adf" Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Jul 2019 01:07:45 -0000 --000000000000d0e81b058cd09adf Content-Type: text/plain; charset="UTF-8" On Thu., 4 Jul. 2019, 06:06 Tom Herbert, wrote: > On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica wrote: > > > > Hi Tom, > > > > Thanks for the review. > > > > On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will contain > a section on mutability. It will say: > > > > - the Segments Left field is mutable > > - every other field in the CRH is immutable > > > > I will also update draft-bonica-6man-vpn-dest-opt and > draft-bonica-6man-seg-end-opt. Both of those request an IANA option type > with the CHG bit equal to 0. So they are both immutable. > > > > SID encoding isn't entirely opportunistic. Since the last IETF, we > realized that it would be burdensome for every vendor to support all three > SID lengths. So, we said that implementations MUST support 32-bit encoding > and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely). > > This sounds dicey from an interoperability and flexibility point of > view. Supposed I've deployed a network where everyone is using 16 bits > SIDs. But, then for some reason I need to switch vendors for a small > part of the network and their implementation doesn't support 16 bits. > Do I need to up the MSV and make all SIDs to be 32 bits just on the > off chance that one of the new nodes might be in some SID list? > > > > > A side effect of this decision is that a node should only send CRH's > with 16-bit encoding every other node in the domain supports 16-bit > encoding. So, network operators will need to configure the SID length on > each node, with the default being 32. > > Well, in light the above problem, I have to wonder if it's better to > only support 32 bits. The leap from 128 bits to 32 bits is much more > consequential than going from 32 to 16 bits. Other than that, it > simplifies the protocol, reduces support and test matrix, ensures > interoperability, etc. > One single size is much better. I think most people will pick the larger size, regardless of their functional SID space need, to avoid the possibility of getting it wrong and then having to do a lot of after hours and possibly service impacting work in the future to expand from the smaller to larger size. Implementations would also be simpler, so less opportunities for implementation bugs. It also means no possibility of configuration errors because the size is a constant rather than a settable parameter. A lot of the principles in RFC 5505 - "Principles of Internet Host Configuration" - seem to me to be equally applicable to network interior protocols. For example, I think the whole of "2.1. Minimize Configuration" fully applies here. Regards, Mark. > Tom > > > > > > Ron > > > > > > > > Juniper Business Use Only > > > > -----Original Message----- > > From: Tom Herbert > > Sent: Wednesday, July 3, 2019 2:48 PM > > To: Ron Bonica > > Cc: SPRING WG ; 6man WG > > Subject: Comments on draft-bonica-spring-srv6-plus > > > > Hi Ron, > > > > Thanks for the draft. > > > > I think the name SRV6+ might be a little misleading in that it could be > misinterpreted as SRV6+ being a superset of SRV6. Specifically, > > SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > > the primary function (and implementation) of SRV6 isn't compatible. It > doesn't seem like it would be that much effort to allow a 128 bit SID size > to be compatible. > > > > I don't understand the rationale for needing a MSV to be explictly > configured throughout the domain. Couldn't the appropriate SID size be > chosen by the sender at run time. For instance, if all the SIDs in a list > are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are > used (I assume 16 and 32 bit SIDs are in same number space). > > Since CRH has the bits stating the SID length there is no ambiguity at > the receiver. SID compression is opportunistic and it's always good > practice to avoid situations that require wide scale renumbering. > > > > Please add a section on mutability requirements of protocol fields so > that there is no ambiguity. > > > > Tom > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > --000000000000d0e81b058cd09adf Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Thu., 4 Jul. 2019, 06:06 Tom Herbert, <tom@he= rbertland.com> wrote:
On Wed= , Jul 3, 2019 at 12:44 PM Ron Bonica <rbonica@juniper.net> wrote:
>
> Hi Tom,
>
> Thanks for the review.
>
> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will conta= in a section on mutability. It will say:
>
> - the Segments Left field is mutable
> - every other field in the CRH is immutable
>
> I will also update draft-bonica-6man-vpn-dest-opt and draft-bonica-6ma= n-seg-end-opt. Both of those request an IANA option type with the CHG bit e= qual to 0. So they are both immutable.
>
> SID encoding isn't entirely opportunistic. Since the last IETF, we= realized that it would be burdensome for every vendor=C2=A0 to support all= three SID lengths. So, we said that implementations MUST support 32-bit en= coding and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely= ).

This sounds dicey from an interoperability and flexibility point of
view. Supposed I've deployed a network where everyone is using 16 bits<= br> SIDs. But, then for some reason I need to switch vendors for a small
part of the network and their implementation doesn't support 16 bits. Do I need to up the MSV and make all SIDs to be 32 bits just on the
off chance that one of the new nodes might be in some SID list?

>
> A side effect of this decision is that a node should only send CRH'= ;s with 16-bit encoding every other node in the domain supports 16-bit enco= ding. So, network operators will need to configure the SID length on each n= ode, with the default being 32.

Well, in light the above problem, I have to wonder if it's better to only support 32 bits. The leap from 128 bits to 32 bits is much more
consequential than going from 32 to 16 bits. Other than that, it
simplifies the protocol, reduces support and test matrix, ensures
interoperability, etc.







Tom

>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Tom Herbert <tom@herbertland.com>
> Sent: Wednesday, July 3, 2019 2:48 PM
> To: Ron Bonica <rbonica@juniper.net>
> Cc: SPRING WG <spring@ietf.org>; 6man WG <i= pv6@ietf.org>
> Subject: Comments on draft-bonica-spring-srv6-plus
>
> Hi Ron,
>
> Thanks for the draft.
>
> I think the name SRV6+ might be a little misleading in that it could b= e misinterpreted as SRV6+ being a superset of SRV6. Specifically,
> SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and = so
> the primary function (and implementation) of SRV6 isn't compatible= . It doesn't seem like it would be that much effort to allow a 128 bit = SID size to be compatible.
>
> I don't understand the rationale for needing a MSV to be explictly= configured throughout the domain. Couldn't the appropriate SID size be= chosen by the sender at run time. For instance, if all the SIDs in a list = are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are use= d (I assume 16 and 32 bit SIDs are in same number space).
> Since CRH has the bits stating the SID length there is no ambiguity at= the receiver. SID compression is opportunistic and it's always good pr= actice to avoid situations that require wide scale renumbering.
>
> Please add a section on mutability requirements of protocol fields so = that there is no ambiguity.
>
> Tom

--------------------------------------------------------------------
IETF IPv6 working group mailing list
ipv6@ietf.org
Administrative Requests: https://www= .ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
--000000000000d0e81b058cd09adf-- From nobody Wed Jul 3 19:31:27 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EACC01201A0; Wed, 3 Jul 2019 19:31:11 -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 tGFcy7Q26i4v; Wed, 3 Jul 2019 19:31:09 -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 3BEF4120176; Wed, 3 Jul 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+0800 From: Mach Chen To: Rob Shakir , SPRING WG List Thread-Topic: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming Thread-Index: AQHVLK+8UsGokdtjNEWk8Us1G7/lx6a5ziJA Date: Thu, 4 Jul 2019 02:55:30 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US, zh-CN Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.194.201] Content-Type: multipart/alternative; boundary="_000_F73A3CB31E8BE34FA1BBE3C8F0CB2AE292AC4492dggeml510mbxchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Jul 2019 02:59:19 -0000 --_000_F73A3CB31E8BE34FA1BBE3C8F0CB2AE292AC4492dggeml510mbxchi_ Content-Type: text/plain; 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--_000_F73A3CB31E8BE34FA1BBE3C8F0CB2AE292AC4492dggeml510mbxchi_-- From nobody Wed Jul 3 23:34:40 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DD5061200C7; Wed, 3 Jul 2019 23:34:37 -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 vi_vFjXulbIg; Wed, 3 Jul 2019 23:34:35 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with 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ZGl2PjwvZGl2PjxwPjxicj48L3A+PC9kaXY+ --=====_003_next=====-- --=====_002_next=====-- --=====_001_next=====-- From nobody Thu Jul 4 16:47:34 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AF42C1200F7; Thu, 4 Jul 2019 16:47:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, 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 btBCv-cIeWBO; Thu, 4 Jul 2019 16:47:29 -0700 (PDT) Received: from chinatelecom.cn (prt-mail.chinatelecom.cn [42.123.76.226]) by ietfa.amsl.com (Postfix) with ESMTP id 548851200D6; Thu, 4 Jul 2019 16:47:28 -0700 (PDT) HMM_SOURCE_IP: 172.18.0.92:15801.1423604926 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-113.108.150.132 (unknown [172.18.0.92]) by chinatelecom.cn (HERMES) with SMTP id F2F7F28008E; Fri, 5 Jul 2019 07:47:22 +0800 (CST) X-189-SAVE-TO-SEND: zhuyq.gd@chinatelecom.cn Received: from EHLO ip<113.108.150.132> ([172.18.0.92]) by App0021 with ESMTP id 7376e516-d8da-4cd0-bbaa-66560a673f4b for jie.dong@huawei.com; Fri Jul 5 07:47:23 2019 X-filter-score: filter<0> X-Real-From: zhuyq.gd@chinatelecom.cn X-Receive-IP: 172.18.0.92 X-MEDUSA-Status: 0 From: "Zhuyq" To: "'Dongjie \(Jimmy\)'" , "'SPRING WG List'" Cc: References: <156198326344.5808.2617871866263111602.idtracker@ietfa.amsl.com> <76CD132C3ADEF848BD84D028D243C927CCECFADB@NKGEML515-MBS.china.huawei.com> In-Reply-To: <76CD132C3ADEF848BD84D028D243C927CCECFADB@NKGEML515-MBS.china.huawei.com> Date: Fri, 5 Jul 2019 07:47:20 +0800 Message-ID: <018c01d532c2$d39eedb0$7adcc910$@chinatelecom.cn> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQIaciIWORMHaTbR3knautEoAilE2gHBeLrGpiKTbDA= Content-Language: zh-cn Archived-At: Subject: [spring] =?utf-8?b?562U5aSNOiAgRlc6IE5ldyBWZXJzaW9uIE5vdGlmaWNh?= =?utf-8?q?tion_for_draft-dong-spring-sr-for-enhanced-vpn-04=2Etxt?= X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Jul 2019 23:47:33 -0000 Hi all, Network slicing is a key feature for 5G to enable diversified services = using the same network infrastructure. In order to support end-to-end = network slicing, it is necessary to consider how to provide network = slicing in mobile transport network. As segment routing is one of the = candidate technologies for 5G transport, it is useful to provide a SR = based network slicing solution to meet the requirement on different = levels of isolation and network customization. This document is a good = starting point in this direction, and we appreciate more review and = discussion to help moving this work forward. Best regards, Zhu Yongqing -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6----- =E5=8F=91=E4=BB=B6=E4=BA=BA: spring = =E4=BB=A3=E8=A1=A8 Dongjie (Jimmy) =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B47=E6=9C=881=E6=97=A5 = 20:25 =E6=94=B6=E4=BB=B6=E4=BA=BA: SPRING WG List =E6=8A=84=E9=80=81: spring-chairs@ietf.org =E4=B8=BB=E9=A2=98: [spring] FW: New Version Notification for = draft-dong-spring-sr-for-enhanced-vpn-04.txt Hi all, We just submitted a new revision of = draft-dong-spring-sr-for-enhanced-vpn. The major changes in this version = are: 1. Clarify that each virtual network can have customized network = topology and may have dedicated network resources, so that both soft = isolation and hard isolation can be covered. 2. Focus on the usage of SR-MPLS SID and SRv6 locator/SID as data plane = identifiers of virtual network topology and resource. 3. In section 5 "Procedures", polish the description about the mechanism = of creating SR virtual networks, and clarify that enhanced VPNs can be = mapped to the same or different SR virtual networks. 4. Section 6 =E2=80=9CBenefits of the proposed mechanism=E2=80=9D is = simplified by focusing on the features of the proposed mechanism. 5. Add new coauthors. Your review and comments are welcome. Best regards, Jie (on behalf of co-authors) -----Original Message----- From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] Sent: Monday, July 01, 2019 8:14 PM To: Takuya Miyasaka ; Zhenqiang Li = ; Fengwei Qin ; = Yongqing Zhu ; Stewart Bryant = ; Dongjie (Jimmy) Subject: New Version Notification for = draft-dong-spring-sr-for-enhanced-vpn-04.txt A new version of I-D, draft-dong-spring-sr-for-enhanced-vpn-04.txt has been successfully submitted by Jie Dong and posted to the IETF = repository. Name: draft-dong-spring-sr-for-enhanced-vpn Revision: 04 Title: Segment Routing for Enhanced VPN Service Document date: 2019-07-01 Group: Individual Submission Pages: 19 URL: = https://www.ietf.org/internet-drafts/draft-dong-spring-sr-for-enhanced-vp= n-04.txt Status: = https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ Htmlized: = https://tools.ietf.org/html/draft-dong-spring-sr-for-enhanced-vpn-04 Htmlized: = https://datatracker.ietf.org/doc/html/draft-dong-spring-sr-for-enhanced-v= pn Diff: = https://www.ietf.org/rfcdiff?url2=3Ddraft-dong-spring-sr-for-enhanced-vpn= -04 Abstract: Enhanced VPN (VPN+) is an enhancement to VPN technology to enable it to support the needs of new applications, particularly applications that are associated with 5G services. These applications require better isolation from both control and data plane's perspective and have more stringent performance requirements than can be provided with overlay VPNs. The characteristics of an enhanced VPN as perceived by its tenant needs to be comparable to those of a dedicated private network. This requires tight integration between the overlay VPN and the underlay network topology and resources in a scalable manner. An enhanced VPN may form the underpinning of 5G network slicing, but will also be of use in its own right. This document describes the use of segment routing based mechanisms to provide the enhanced VPN service with required network topology and resources. The overall mechanism of using segment routing to provide enhanced VPN service is also described. The proposed mechanism is applicable to both SR with MPLS data plane and SR with IPv6 data plane (SRv6). 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. 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, We have posted -05 version of draft-hegde-spring-node-protection-for-sr-te-= paths https://datatracker.ietf.org/doc/draft-hegde-spring-node-protection-for-sr-= te-paths/ New sections have been added for addressing convergence and optimizations. 4. Hold timers for Node-SID/Prefix-SIDs and Adjacency-SIDs 5. Optimization Considerations Kindly review and provide comments. Rgds Shraddha --_000_BYAPR05MB39432C7ED270DCA1EF707353D5F40BYAPR05MB3943namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Hi All,
 
We have posted -05 version of draft-hegde-spring-node-protection-for-s= r-te-paths
 
 
New sections have been added for addressing convergence and optimizati= ons.
 
= 4. Hold timers for Node-SID/Prefix-SIDs and Adjacency-SIDs
= 5.  Optimization Considerations
 
 
= Kindly review and provide comments.
=  
= Rgds
= Shraddha
 
 --_000_BYAPR05MB39432C7ED270DCA1EF707353D5F40BYAPR05MB3943namp_-- From nobody Sat Jul 6 07:48:51 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9581E1200B3; Sat, 6 Jul 2019 07:48:49 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, HTTPS_HTTP_MISMATCH=0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=juniper.net 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 IiR-nvAbAAsB; Sat, 6 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X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR05MB5014 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-06_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907060284 Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Jul 2019 21:05:57 -0000 --_000_BYAPR05MB42451A4B567C0418AB1D0EADAEF40BYAPR05MB4245namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Mark, In my experience, operators object when SR overhead consumes more than 80 b= ytes. Also, I have encountered two classes of operator: * Those who avoid strictly-routed segments * Those who rely heavily on strictly-routed segments Those who avoid strictly-routed segments rarely generate SID Lists that con= tain more than 8 entries. So, they are generally OK with 32-bit encoding. T= his is because with 32-bit encoding, the total SR overhead is exactly 80 by= tes (i.e., 40 bytes for the IPv6 header and 40 bytes for the CRH). By contrast, those who rely on strictly-routed segments regularly generate = SID Lists that contain more than 8 entries. So, they are generally required= 16-bit encoding. IMHO, the operator understands its needs better than we do. We should suppo= rt both. Let the operator decide at run time. = Ron From: Mark Smith Sent: Wednesday, July 3, 2019 9:08 PM To: Tom Herbert Cc: Ron Bonica ; SPRING WG ; 6man WG = Subject: Re: Comments on draft-bonica-spring-srv6-plus On Thu., 4 Jul. 2019, 06:06 Tom Herbert, > wrote: On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica > wrote: > > Hi Tom, > > Thanks for the review. > > On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will contain = a section on mutability. It will say: > > - the Segments Left field is mutable > - every other field in the CRH is immutable > > I will also update draft-bonica-6man-vpn-dest-opt and draft-bonica-6man-s= eg-end-opt. Both of those request an IANA option type with the CHG bit equa= l to 0. So they are both immutable. > > SID encoding isn't entirely opportunistic. Since the last IETF, we realiz= ed that it would be burdensome for every vendor to support all three SID l= engths. So, we said that implementations MUST support 32-bit encoding and M= AY support 16 bit encoding. (We dropped 8-bit encoding entirely). This sounds dicey from an interoperability and flexibility point of view. Supposed I've deployed a network where everyone is using 16 bits SIDs. But, then for some reason I need to switch vendors for a small part of the network and their implementation doesn't support 16 bits. Do I need to up the MSV and make all SIDs to be 32 bits just on the off chance that one of the new nodes might be in some SID list? > > A side effect of this decision is that a node should only send CRH's with= 16-bit encoding every other node in the domain supports 16-bit encoding. S= o, network operators will need to configure the SID length on each node, wi= th the default being 32. Well, in light the above problem, I have to wonder if it's better to only support 32 bits. The leap from 128 bits to 32 bits is much more consequential than going from 32 to 16 bits. Other than that, it simplifies the protocol, reduces support and test matrix, ensures interoperability, etc. One single size is much better. I think most people will pick the larger size, regardless of their function= al SID space need, to avoid the possibility of getting it wrong and then ha= ving to do a lot of after hours and possibly service impacting work in the = future to expand from the smaller to larger size. Implementations would also be simpler, so less opportunities for implementa= tion bugs. It also means no possibility of configuration errors because the size is a = constant rather than a settable parameter. A lot of the principles in RFC 5505 - "Principles of Internet Host Configur= ation" - seem to me to be equally applicable to network interior protocols. For example, I think the whole of "2.1. Minimize Configuration" fully appli= es here. Regards, Mark. Tom > > = Ron > > > > Juniper Business Use Only > > -----Original Message----- > From: Tom Herbert > > Sent: Wednesday, July 3, 2019 2:48 PM > To: Ron Bonica > > Cc: SPRING WG >; 6man WG > > Subject: Comments on draft-bonica-spring-srv6-plus > > Hi Ron, > > Thanks for the draft. > > I think the name SRV6+ might be a little misleading in that it could be m= isinterpreted as SRV6+ being a superset of SRV6. Specifically, > SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > the primary function (and implementation) of SRV6 isn't compatible. It do= esn't seem like it would be that much effort to allow a 128 bit SID size to= be compatible. > > I don't understand the rationale for needing a MSV to be explictly config= ured throughout the domain. Couldn't the appropriate SID size be chosen by = the sender at run time. For instance, if all the SIDs in a list are less th= an 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are used (I assume= 16 and 32 bit SIDs are in same number space). > Since CRH has the bits stating the SID length there is no ambiguity at th= e receiver. SID compression is opportunistic and it's always good practice = to avoid situations that require wide scale renumbering. > > Please add a section on mutability requirements of protocol fields so tha= t there is no ambiguity. > > Tom -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 -------------------------------------------------------------------- Juniper Business Use Only --_000_BYAPR05MB42451A4B567C0418AB1D0EADAEF40BYAPR05MB4245namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Mark,

 

In my experience, operators object when SR overhead = consumes more than 80 bytes. Also, I have encountered two classes of operat= or:

 

  • Those who avoid strictly-routed segments
  • Those w= ho rely heavily on strictly-routed segments

 

Those who avoid strictly-routed segments rarely gene= rate SID Lists that contain more than 8 entries. So, they are generally OK = with 32-bit encoding. This is because with 32-bit encoding, the total SR ov= erhead is exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the CRH).

 

By contrast, those who rely on strictly-routed segme= nts regularly generate SID Lists that contain more than 8 entries. So, they= are generally required 16-bit encoding.

IMHO, the operator understands its needs better than we do. We should suppo= rt both. Let the operator decide at run time.

 

        &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;    Ron

 

 

From: Mark Smith <markzzzsmith@gmail.com&g= t;
Sent: Wednesday, July 3, 2019 9:08 PM
To: Tom Herbert <tom@herbertland.com>
Cc: Ron Bonica <rbonica@juniper.net>; SPRING WG <spring@iet= f.org>; 6man WG <ipv6@ietf.org>
Subject: Re: Comments on draft-bonica-spring-srv6-plus

 

 

On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica <rbonica@juniper.net= > wrote:
>
> Hi Tom,
>
> Thanks for the review.
>
> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will conta= in a section on mutability. It will say:
>
> - the Segments Left field is mutable
> - every other field in the CRH is immutable
>
> I will also update draft-bonica-6man-vpn-dest-opt and draft-bonica-6ma= n-seg-end-opt. Both of those request an IANA option type with the CHG bit e= qual to 0. So they are both immutable.
>
> SID encoding isn't entirely opportunistic. Since the last IETF, we rea= lized that it would be burdensome for every vendor  to support all thr= ee SID lengths. So, we said that implementations MUST support 32-bit encodi= ng and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely).

This sounds dicey from an interoperability and flexibility point of
view. Supposed I've deployed a network where everyone is using 16 bits
SIDs. But, then for some reason I need to switch vendors for a small
part of the network and their implementation doesn't support 16 bits.
Do I need to up the MSV and make all SIDs to be 32 bits just on the
off chance that one of the new nodes might be in some SID list?

>
> A side effect of this decision is that a node should only send CRH's w= ith 16-bit encoding every other node in the domain supports 16-bit encoding= . So, network operators will need to configure the SID length on each node,= with the default being 32.

Well, in light the above problem, I have to wonder if it's better to
only support 32 bits. The leap from 128 bits to 32 bits is much more
consequential than going from 32 to 16 bits. Other than that, it
simplifies the protocol, reduces support and test matrix, ensures
interoperability, etc.

 

One single size is much better.

 

I think most people will pick the larger size, regar= dless of their functional SID space need, to avoid the possibility of getti= ng it wrong and then having to do a lot of after hours and possibly service= impacting work in the future to expand from the smaller to larger size.

 

Implementations would also be simpler, so less oppor= tunities for implementation bugs.

 

It also means no possibility of configuration errors= because the size is a constant rather than a settable parameter.

 

A lot of the principles in RFC 5505 - "Principl= es of Internet Host Configuration" - seem to me to be equally applicab= le to network interior protocols.

 

For example, I think the whole of "2.1. Minimiz= e Configuration" fully applies here.

 

Regards,

Mark.

 

 

 


Tom

>
>                    &= nbsp;                    =                     &nbs= p;               Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Tom Herbert <tom@herbertland.com>
> Sent: Wednesday, July 3, 2019 2:48 PM
> To: Ron Bonica <rbonica@juniper.net>
> Cc: SPRING WG <spring@ietf.org>; 6man WG <ipv6@ietf.org>
> Subject: Comments on draft-bonica-spring-srv6-plus
>
> Hi Ron,
>
> Thanks for the draft.
>
> I think the name SRV6+ might be a little misleading in that it cou= ld be misinterpreted as SRV6+ being a superset of SRV6. Specifically, > SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and = so
> the primary function (and implementation) of SRV6 isn't compatible. It= doesn't seem like it would be that much effort to allow a 128 bit SID size= to be compatible.
>
> I don't understand the rationale for needing a MSV to be explictly con= figured throughout the domain. Couldn't the appropriate SID size be chosen = by the sender at run time. For instance, if all the SIDs in a list are less= than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are used (I assume 16 and 32 bit SIDs are in same n= umber space).
> Since CRH has the bits stating the SID length there is no ambiguity at= the receiver. SID compression is opportunistic and it's always good practi= ce to avoid situations that require wide scale renumbering.
>
> Please add a section on mutability requirements of protocol fields so = that there is no ambiguity.
>
> Tom

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--_000_BYAPR05MB42451A4B567C0418AB1D0EADAEF40BYAPR05MB4245namp_-- From nobody Sat Jul 6 14:42:00 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 10C591200EF; Sat, 6 Jul 2019 14:41:51 -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, 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 KddnPhP7IBct; Sat, 6 Jul 2019 14:41:48 -0700 (PDT) Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) (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 2AEAF120045; Sat, 6 Jul 2019 14:41:48 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id c73so1082370pfb.13; Sat, 06 Jul 2019 14:41:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=xEYAYwJfhVw4nmCYRqS2PaUdDzFUTQ73Bs4Su2PSfug=; b=TDfgv2z5J/YswRsOzRpScY+J1lZjuG5YUTgicaoJa2AdFcPJ1u22ghjcWN1gM8/FQm w+hZJeMfIcI+4BvYnvEh+APdkIE7T3sQ9qvq4PoyXNLvuyuMfHCCCpSQeAPXK826q318 FB7cnO/Lmv/Eli09DiD8Vp38o1hAOUCP4jcjayGB6igy2C8HRLeLhWu3lZtKTqKZnTKo 5mhglq3wAUynfuWxE5ZwU8agEKrX9Cs1iQBV6N45M3gIbVHG83+eAo5yvkoUeMpNwkWh jqZ6FhHB+Zn8wrQikDXE7+t9LDY/CivLVAZNJMrogoqKZG9Xl6l4PBwBMpiffhhgx0PH Mt6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=xEYAYwJfhVw4nmCYRqS2PaUdDzFUTQ73Bs4Su2PSfug=; b=hwLQE5vQaNRPLM2KsqMwut8tPWkqrbsjicSxUZoOG5EG2QA1nPqTsxaRviD8ptrYs9 yR+ir5yzKD7O3DMxnA5zfLwuGkIA6/R2tacXQZ4RFr2zp3XlMVXkcrF1HNmT4mXgzEzW Yup26Ztn5MASxx26AoxOeZV+XKz7EXW8EG1Kfmht6CAxf3z15ef/IrUFUhBq4S/N1qvM etjI5KhONKXwGorWB4w01gSCSCMVChErMmxeOdV+xCY1X9mAAKkKqDdpyTGhc0wX/86v OFaac3E14VJKPm/JMwMubx0D7mxKeKRJvYFCSKCkWcGnbDWLakQSSut1ZckWPqldc6pc eq8Q== X-Gm-Message-State: APjAAAU0CLjILi2Mea7bk3bC/0n+nucQa5q2Oh3EjQaAB3mLhU8fKWFu ef0C7VQqhamgXgLA8yoLGUA= X-Google-Smtp-Source: APXvYqwIbGH2gX19ePxYU+cAKywsV5UsshEK5q96A4JgOtMN3jhgtR4rgc+1bJgujPed7TU2rOsYiA== X-Received: by 2002:a63:550e:: with SMTP id j14mr4526037pgb.302.1562449307455; Sat, 06 Jul 2019 14:41:47 -0700 (PDT) Received: from ?IPv6:2601:647:5a00:ef0b:888c:e068:49f5:c461? ([2601:647:5a00:ef0b:888c:e068:49f5:c461]) by smtp.gmail.com with ESMTPSA id 85sm12592545pfv.130.2019.07.06.14.41.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 06 Jul 2019 14:41:46 -0700 (PDT) From: Bob Hinden Message-Id: Content-Type: multipart/signed; boundary="Apple-Mail=_307EFCF8-F78B-44A8-B996-74A4FE5B5722"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Sat, 6 Jul 2019 14:41:44 -0700 In-Reply-To: Cc: Bob Hinden , Mark Smith , Tom Herbert , SPRING WG , IPv6 List To: Ron Bonica References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Jul 2019 21:41:51 -0000 --Apple-Mail=_307EFCF8-F78B-44A8-B996-74A4FE5B5722 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Ron, > On Jul 6, 2019, at 2:05 PM, Ron Bonica = wrote: >=20 > Hi Mark, >=20 > In my experience, operators object when SR overhead consumes more than = 80 bytes. Also, I have encountered two classes of operator: What is special about 80? Why not 64, 128, 256? Bob >=20 > =E2=80=A2 Those who avoid strictly-routed segments > =E2=80=A2 Those who rely heavily on strictly-routed segments >=20 > Those who avoid strictly-routed segments rarely generate SID Lists = that contain more than 8 entries. So, they are generally OK with 32-bit = encoding. This is because with 32-bit encoding, the total SR overhead is = exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for = the CRH). >=20 > By contrast, those who rely on strictly-routed segments regularly = generate SID Lists that contain more than 8 entries. So, they are = generally required 16-bit encoding. >=20 > IMHO, the operator understands its needs better than we do. We should = support both. Let the operator decide at run time. >=20 > = Ron >=20 >=20 > From: Mark Smith > Sent: Wednesday, July 3, 2019 9:08 PM > To: Tom Herbert > Cc: Ron Bonica ; SPRING WG ; = 6man WG > Subject: Re: Comments on draft-bonica-spring-srv6-plus >=20 >=20 >=20 > On Thu., 4 Jul. 2019, 06:06 Tom Herbert, wrote: > On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica = wrote: > > > > Hi Tom, > > > > Thanks for the review. > > > > On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will = contain a section on mutability. It will say: > > > > - the Segments Left field is mutable > > - every other field in the CRH is immutable > > > > I will also update draft-bonica-6man-vpn-dest-opt and = draft-bonica-6man-seg-end-opt. Both of those request an IANA option type = with the CHG bit equal to 0. So they are both immutable. > > > > SID encoding isn't entirely opportunistic. Since the last IETF, we = realized that it would be burdensome for every vendor to support all = three SID lengths. So, we said that implementations MUST support 32-bit = encoding and MAY support 16 bit encoding. (We dropped 8-bit encoding = entirely). >=20 > This sounds dicey from an interoperability and flexibility point of > view. Supposed I've deployed a network where everyone is using 16 bits > SIDs. But, then for some reason I need to switch vendors for a small > part of the network and their implementation doesn't support 16 bits. > Do I need to up the MSV and make all SIDs to be 32 bits just on the > off chance that one of the new nodes might be in some SID list? >=20 > > > > A side effect of this decision is that a node should only send CRH's = with 16-bit encoding every other node in the domain supports 16-bit = encoding.. So, network operators will need to configure the SID length = on each node, with the default being 32. >=20 > Well, in light the above problem, I have to wonder if it's better to > only support 32 bits. The leap from 128 bits to 32 bits is much more > consequential than going from 32 to 16 bits. Other than that, it > simplifies the protocol, reduces support and test matrix, ensures > interoperability, etc. >=20 > One single size is much better. >=20 > I think most people will pick the larger size, regardless of their = functional SID space need, to avoid the possibility of getting it wrong = and then having to do a lot of after hours and possibly service = impacting work in the future to expand from the smaller to larger size. >=20 > Implementations would also be simpler, so less opportunities for = implementation bugs. >=20 > It also means no possibility of configuration errors because the size = is a constant rather than a settable parameter. >=20 > A lot of the principles in RFC 5505 - "Principles of Internet Host = Configuration" - seem to me to be equally applicable to network interior = protocols. >=20 > For example, I think the whole of "2.1. Minimize Configuration" fully = applies here. >=20 > Regards, > Mark. >=20 >=20 >=20 >=20 > Tom >=20 > > > > = Ron > > > > > > > > Juniper Business Use Only > > > > -----Original Message----- > > From: Tom Herbert > > Sent: Wednesday, July 3, 2019 2:48 PM > > To: Ron Bonica > > Cc: SPRING WG ; 6man WG > > Subject: Comments on draft-bonica-spring-srv6-plus > > > > Hi Ron, > > > > Thanks for the draft. > > > > I think the name SRV6+ might be a little misleading in that it could = be misinterpreted as SRV6+ being a superset of SRV6. Specifically, > > SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > > the primary function (and implementation) of SRV6 isn't compatible. = It doesn't seem like it would be that much effort to allow a 128 bit SID = size to be compatible. > > > > I don't understand the rationale for needing a MSV to be explictly = configured throughout the domain. Couldn't the appropriate SID size be = chosen by the sender at run time. For instance, if all the SIDs in a = list are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs = are used (I assume 16 and 32 bit SIDs are in same number space). > > Since CRH has the bits stating the SID length there is no ambiguity = at the receiver. SID compression is opportunistic and it's always good = practice to avoid situations that require wide scale renumbering. > > > > Please add a section on mutability requirements of protocol fields = so that there is no ambiguity. > > > > Tom >=20 > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- >=20 > Juniper Business Use Only > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- --Apple-Mail=_307EFCF8-F78B-44A8-B996-74A4FE5B5722 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEm0rfRsOCoyamPexGrut0EXfnu6gFAl0hFZgACgkQrut0EXfn u6hm2AgAjaAYPulLrIlpdDN0KrJSGFf1ZfFnzgdoP9AmNrbC4Br6FkoMntwZqrCf w2Sqn+LJ7Tepeu7tRyZg/8X6HYI7LNfJK0NUCOwQtHUNnRa5UoWjg9UJvqCNO/l9 D9YLeRGLyoaSJiKsOOmhMjjcHD+woD2e1izJx609fh1tOXG5mxXGjyhe3lxia1Vh 56sVbBDE5nczHR1XBhJNIynDkVMdUmw3GedpGiy2/VhLwmRXoRqMs3qJa+ejKGNw pq5hyXybhgpPzzDEQ277iiNReXlM8t+57EMbtxUOtPt8z64wQhERxXQaFltaHrrO MaFLdiOSiyzA7dvDQGsgfHO/F4eGAw== =kJjX -----END PGP SIGNATURE----- --Apple-Mail=_307EFCF8-F78B-44A8-B996-74A4FE5B5722-- From nobody Sat Jul 6 16:23:44 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5B931120105 for ; 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Sat, 06 Jul 2019 16:23:38 -0700 (PDT) MIME-Version: 1.0 References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: From: Tom Herbert Date: Sat, 6 Jul 2019 16:23:25 -0700 Message-ID: To: Ronald Bonica Cc: Mark Smith , SPRING WG , 6man WG Content-Type: multipart/alternative; boundary="00000000000031177a058d0b8070" Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Jul 2019 23:23:43 -0000 --00000000000031177a058d0b8070 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, Jul 6, 2019, 2:05 PM Ron Bonica wrote: > Hi Mark, > > > > In my experience, operators object when SR overhead consumes more than 80 > bytes. Also, I have encountered two classes of operator: > > > > - Those who avoid strictly-routed segments > - Those who rely heavily on strictly-routed segments > > > > Those who avoid strictly-routed segments rarely generate SID Lists that > contain more than 8 entries. So, they are generally OK with 32-bit > encoding. This is because with 32-bit encoding, the total SR overhead is > exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the > CRH). > > > > By contrast, those who rely on strictly-routed segments regularly generat= e > SID Lists that contain more than 8 entries. So, they are generally requir= ed > 16-bit encoding. > > IMHO, the operator understands its needs better than we do. We should > support both. Let the operator decide at run time. > If devices the operator has deployed don't support all the modes, then it's not really a decision the operator can make, especially if they are bound by the least common denominator of support. This is the predicament of the largest operators that have a variety of different vendor devices in deployment. Ron, I'm a little surprised that there is pushback on being to support two SID sizes in an implementation. This doesn't seem all that complex to me, especially in light of the complex functionality being defined in other low level protocols such as SR. Can you, or someone who sees this as an issue, provide a little more context on this problem? Thanks, Tom > > > Ron > > > > > > *From:* Mark Smith > *Sent:* Wednesday, July 3, 2019 9:08 PM > *To:* Tom Herbert > *Cc:* Ron Bonica ; SPRING WG ; 6man > WG > *Subject:* Re: Comments on draft-bonica-spring-srv6-plus > > > > > > On Thu., 4 Jul. 2019, 06:06 Tom Herbert, wrote: > > On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica wrote: > > > > Hi Tom, > > > > Thanks for the review. > > > > On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will contai= n > a section on mutability. It will say: > > > > - the Segments Left field is mutable > > - every other field in the CRH is immutable > > > > I will also update draft-bonica-6man-vpn-dest-opt and > draft-bonica-6man-seg-end-opt. Both of those request an IANA option type > with the CHG bit equal to 0. So they are both immutable. > > > > SID encoding isn't entirely opportunistic. Since the last IETF, we > realized that it would be burdensome for every vendor to support all thr= ee > SID lengths. So, we said that implementations MUST support 32-bit encodin= g > and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely). > > This sounds dicey from an interoperability and flexibility point of > view. Supposed I've deployed a network where everyone is using 16 bits > SIDs. But, then for some reason I need to switch vendors for a small > part of the network and their implementation doesn't support 16 bits. > Do I need to up the MSV and make all SIDs to be 32 bits just on the > off chance that one of the new nodes might be in some SID list? > > > > > A side effect of this decision is that a node should only send CRH's > with 16-bit encoding every other node in the domain supports 16-bit > encoding. So, network operators will need to configure the SID length on > each node, with the default being 32. > > Well, in light the above problem, I have to wonder if it's better to > only support 32 bits. The leap from 128 bits to 32 bits is much more > consequential than going from 32 to 16 bits. Other than that, it > simplifies the protocol, reduces support and test matrix, ensures > interoperability, etc. > > > > One single size is much better. > > > > I think most people will pick the larger size, regardless of their > functional SID space need, to avoid the possibility of getting it wrong a= nd > then having to do a lot of after hours and possibly service impacting wor= k > in the future to expand from the smaller to larger size. > > > > Implementations would also be simpler, so less opportunities for > implementation bugs. > > > > It also means no possibility of configuration errors because the size is = a > constant rather than a settable parameter. > > > > A lot of the principles in RFC 5505 - "Principles of Internet Host > Configuration" - seem to me to be equally applicable to network interior > protocols. > > > > For example, I think the whole of "2.1. Minimize Configuration" fully > applies here. > > > > Regards, > > Mark. > > > > > > > > > Tom > > > > > > Ron > > > > > > > > Juniper Business Use Only > > > > -----Original Message----- > > From: Tom Herbert > > Sent: Wednesday, July 3, 2019 2:48 PM > > To: Ron Bonica > > Cc: SPRING WG ; 6man WG > > Subject: Comments on draft-bonica-spring-srv6-plus > > > > Hi Ron, > > > > Thanks for the draft. > > > > I think the name SRV6+ might be a little misleading in that it could be > misinterpreted as SRV6+ being a superset of SRV6. Specifically, > > SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > > the primary function (and implementation) of SRV6 isn't compatible. It > doesn't seem like it would be that much effort to allow a 128 bit SID siz= e > to be compatible. > > > > I don't understand the rationale for needing a MSV to be explictly > configured throughout the domain. Couldn't the appropriate SID size be > chosen by the sender at run time. For instance, if all the SIDs in a list > are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are > used (I assume 16 and 32 bit SIDs are in same number space). > > Since CRH has the bits stating the SID length there is no ambiguity at > the receiver. SID compression is opportunistic and it's always good > practice to avoid situations that require wide scale renumbering. > > > > Please add a section on mutability requirements of protocol fields so > that there is no ambiguity. > > > > Tom > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > > -------------------------------------------------------------------- > > > > Juniper Business Use Only > > --00000000000031177a058d0b8070 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Sat, Jul 6, 2019, 2:05 PM Ron Bonica <rbonica@juniper.net> wrote:

Hi Mark,

=C2=A0

In my experience, operators object when SR overhead = consumes more than 80 bytes. Also, I have encountered two classes of operat= or:

=C2=A0

  • Those who avoid strictly-routed segments
  • Those who = rely heavily on strictly-routed segments

=C2=A0

Those who avoid strictly-routed segments rarely gene= rate SID Lists that contain more than 8 entries. So, they are generally OK = with 32-bit encoding. This is because with 32-bit encoding, the total SR ov= erhead is exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the CRH).

=C2=A0

By contrast, those who rely on strictly-routed segme= nts regularly generate SID Lists that contain more than 8 entries. So, they= are generally required 16-bit encoding.

IMHO, the operator understands its needs better than we do. We should suppo= rt both. Let the operator decide at run time.

<= /div>

If devices the ope= rator has deployed don't support all the modes, then it's not reall= y a decision the operator can make, especially if they are bound by the lea= st common denominator of support. This is the predicament of the largest op= erators that have a variety of different vendor devices in deployment.

Ron, I'm a little surpri= sed that there is pushback on being to support two SID sizes in an implemen= tation. This doesn't seem all that complex to me, especially in light o= f the complex functionality being defined in other low level protocols such= as SR. Can you, or someone who sees this as an issue, provide a little mor= e context on this problem?

Thanks,
Tom

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 Ron

=C2=A0

=C2=A0

From: Mark Smith <markzzzsmith@gmail.c= om>
Sent: Wednesday, July 3, 2019 9:08 PM
To: Tom Herbert <tom@herbertland.com>
Cc: Ron Bonica <rbonica@juniper.net>; SPRING WG <spring@i= etf.org>; 6man WG <ipv6@ietf.org>
Subject: Re: Comments on draft-bonica-spring-srv6-plus=

=C2=A0

=C2=A0<= /p>

On Thu., 4 Jul. 2019, 06:06 Tom Herbert, <tom@he= rbertland.com> wrote:

On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica <rbon= ica@juniper.net> wrote:
>
> Hi Tom,
>
> Thanks for the review.
>
> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will conta= in a section on mutability. It will say:
>
> - the Segments Left field is mutable
> - every other field in the CRH is immutable
>
> I will also update draft-bonica-6man-vpn-dest-opt and draft-bonica-6ma= n-seg-end-opt. Both of those request an IANA option type with the CHG bit e= qual to 0. So they are both immutable.
>
> SID encoding isn't entirely opportunistic. Since the last IETF, we= realized that it would be burdensome for every vendor=C2=A0 to support all= three SID lengths. So, we said that implementations MUST support 32-bit en= coding and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely).

This sounds dicey from an interoperability and flexibility point of
view. Supposed I've deployed a network where everyone is using 16 bits<= br> SIDs. But, then for some reason I need to switch vendors for a small
part of the network and their implementation doesn't support 16 bits. Do I need to up the MSV and make all SIDs to be 32 bits just on the
off chance that one of the new nodes might be in some SID list?

>
> A side effect of this decision is that a node should only send CRH'= ;s with 16-bit encoding every other node in the domain supports 16-bit enco= ding. So, network operators will need to configure the SID length on each n= ode, with the default being 32.

Well, in light the above problem, I have to wonder if it's better to only support 32 bits. The leap from 128 bits to 32 bits is much more
consequential than going from 32 to 16 bits. Other than that, it
simplifies the protocol, reduces support and test matrix, ensures
interoperability, etc.

=C2=A0

One single size is much better.

=C2=A0

I think most people will pick the larger size, regar= dless of their functional SID space need, to avoid the possibility of getti= ng it wrong and then having to do a lot of after hours and possibly service= impacting work in the future to expand from the smaller to larger size.

=C2=A0

Implementations would also be simpler, so less oppor= tunities for implementation bugs.

=C2=A0

It also means no possibility of configuration errors= because the size is a constant rather than a settable parameter.=

=C2=A0

A lot of the principles in RFC 5505 - "Principl= es of Internet Host Configuration" - seem to me to be equally applicab= le to network interior protocols.

=C2=A0

For example, I think the whole of "2.1. Minimiz= e Configuration" fully applies here.

=C2=A0

Regards,

Mark.

=C2=A0

=C2=A0

=C2=A0


Tom

>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Tom Herbert <tom@herbertland.com>
> Sent: Wednesday, July 3, 2019 2:48 PM
> To: Ron Bonica <rbonica@juniper.net>
> Cc: SPRING WG <spring@ietf.org>; 6man WG <ipv6@ietf.org> > Subject: Comments on draft-bonica-spring-srv6-plus
>
> Hi Ron,
>
> Thanks for the draft.
>
> I think the name SRV6+ might be a little misleading in that it could b= e misinterpreted as SRV6+ being a superset of SRV6. Specifically,
> SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and = so
> the primary function (and implementation) of SRV6 isn't compatible= . It doesn't seem like it would be that much effort to allow a 128 bit = SID size to be compatible.
>
> I don't understand the rationale for needing a MSV to be explictly= configured throughout the domain. Couldn't the appropriate SID size be= chosen by the sender at run time. For instance, if all the SIDs in a list = are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are used (I assume 16 and 32 bit SIDs are in same n= umber space).
> Since CRH has the bits stating the SID length there is no ambiguity at= the receiver. SID compression is opportunistic and it's always good pr= actice to avoid situations that require wide scale renumbering.
>
> Please add a section on mutability requirements of protocol fields so = that there is no ambiguity.
>
> Tom

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Juniper Business Use Only

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This draft is a work item of the Source Packet Routing in Networking WG of the IETF. Title : YANG Data Model for Segment Routing Authors : Stephane Litkowski Yingzhen Qu Acee Lindem Pushpasis Sarkar Jeff Tantsura Filename : draft-ietf-spring-sr-yang-13.txt Pages : 29 Date : 2019-07-07 Abstract: This document defines a YANG data model ([RFC6020], [RFC7950]) for segment routing ([RFC8402]) configuration and operation. This YANG model is intended to be used on network elements to configure or operate segment routing. This document defines also generic containers that SHOULD be reused by IGP protocol modules to support segment routing. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-spring-sr-yang/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-spring-sr-yang-13 https://datatracker.ietf.org/doc/html/draft-ietf-spring-sr-yang-13 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-sr-yang-13 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. 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spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 97104120293; Mon, 8 Jul 2019 09:45:00 -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 ZgqbN86DUBF1; Mon, 8 Jul 2019 09:44:57 -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 50B591202D2; Mon, 8 Jul 2019 09:44:57 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 09BA94FA6C6EAE15BD89; Mon, 8 Jul 2019 17:44:55 +0100 (IST) Received: from DGGEML404-HUB.china.huawei.com (10.3.17.39) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Mon, 8 Jul 2019 17:44:54 +0100 Received: from DGGEML529-MBX.china.huawei.com ([169.254.6.87]) by DGGEML404-HUB.china.huawei.com ([fe80::b177:a243:7a69:5ab8%31]) with mapi id 14.03.0439.000; Tue, 9 Jul 2019 00:41:33 +0800 From: "Chengli (Cheng Li)" To: SPRING WG List , 6man WG Thread-Topic: Request for comments: draft-li-spring-srv6-security-consideration-01.txt Thread-Index: AdU1q0nU4+quhNEJRriodCV+Wcg6Og== Date: Mon, 8 Jul 2019 16:41:32 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.130.185.75] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] Request for comments: 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Thread-Index: AdU12gZxiC6o7DmCSja15PZWT4zSoA== Date: Mon, 8 Jul 2019 22:11:11 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=linda.dunbar@futurewei.com; x-originating-ip: [12.111.81.80] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bbd23282-ab51-4bb1-a823-08d703f12f51 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(5600148)(711020)(4605104)(1401327)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020); SRVR:MN2PR13MB2686; x-ms-traffictypediagnostic: MN2PR13MB2686: x-ms-exchange-purlcount: 3 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8273; x-forefront-prvs: 00922518D8 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(346002)(396003)(136003)(39840400004)(366004)(376002)(189003)(199004)(316002)(53936002)(76116006)(3846002)(790700001)(6116002)(71200400001)(86362001)(476003)(71190400001)(2906002)(68736007)(236005)(66476007)(55016002)(73956011)(66446008)(64756008)(9686003)(54896002)(66556008)(66574012)(52536014)(66946007)(5660300002)(6436002)(6306002)(8676002)(81166006)(6916009)(81156014)(26005)(102836004)(186003)(478600001)(33656002)(8936002)(7696005)(14454004)(966005)(99286004)(256004)(7736002)(74316002)(44832011)(606006)(25786009)(486006)(14444005)(66066001)(6506007)(193643001); DIR:OUT; SFP:1102; SCL:1; SRVR:MN2PR13MB2686; H:MN2PR13MB3582.namprd13.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: futurewei.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: wt5Zgw686RDVBULQ156ICEq2/FvXXeGIUr1LZkSmP7N9taIad8gwGuPTbScj75xvR2nTm8rZAn6k789gvNT9gKGEzWDyewdlTpCHdu+EOwa6hGk+nyAfOf0l7ikK9rKdoucdUOLLpwJXkSIMNJv2naIksHAGU4/d9o+e1Wk3m9EtqK0WGjOoRE66HT36Zh79c8risiGYXKDDI0roBn37O7cpGfz1cvpyAOWWU1Vn/tRcD7O6yQfEyd0Iq+DSWYTiX8TFFPNOC8KyDM55kiBoZhuDCVeiljTuArn8pyQ6xo+nGh0Hk6kVJlM+Uj4bBOrbu9fXeMBma3i2FGoPAppyaPqjIgeIDVfQVqpJGzhGFi0kgKnEH+LH1BLfl7DHQRXytttuAv+8xKfqNgnk6dhmHAeCqTfFuGE1ob3UgB/Du94= Content-Type: multipart/alternative; boundary="_000_MN2PR13MB35821DA403CCE784CB3B065D85F60MN2PR13MB3582namp_" MIME-Version: 1.0 X-OriginatorOrg: Futurewei.com X-MS-Exchange-CrossTenant-Network-Message-Id: bbd23282-ab51-4bb1-a823-08d703f12f51 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Jul 2019 22:11:11.1027 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 0fee8ff2-a3b2-4018-9c75-3a1d5591fedc X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ldunbar@futurewei.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR13MB2686 Archived-At: Subject: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jul 2019 22:11:29 -0000 --_000_MN2PR13MB35821DA403CCE784CB3B065D85F60MN2PR13MB3582namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable SD-WAN, as described by ONUG (Open Network User Group), is about pooling WA= N bandwidth from multiple service providers to get better WAN bandwidth man= agement, visibility & control. Because of the ephemeral property of the selected Cloud DCs, an enterprise = or its network service provider may not have the direct links to the Cloud = DCs that are optimal for hosting the enterprise's specific workloads/Apps. = Under those circumstances, SD-WAN is a very flexible choice to interconnect= the enterprise on-premises data centers & branch offices to its desired Cl= oud DCs. However, SD-WAN paths over public internet can have unpredictable performan= ce, especially over long distances and cross state/country boundaries. Ther= efore, it is highly desirable to place as much as possible the portion of S= D-WAN paths over service provider VPN (e.g. enterprise's existing VPN) that= have guaranteed SLA and to minimize the distance/segments over public inte= rnet. https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-hybrid-networks= / describes a method to enforce a SD-WAN path's head-end selected route tra= versing through a list of specific nodes of multiple network segments witho= ut requiring the nodes in each network segments to have the intelligence (o= r maintaining states) of selecting next hop or next segments. When a SR domain has multiple PEs with ports facing the external networks (= such as the public internet or LTE termination), SD-WAN paths can traverse = the SR domain via different ingress/egress PEs resulting in different E2E p= erformance. Even with the same ingress/egress, some flows may need different segments a= cross the SR Domain. It is not practical, or even possible, for PEs to dete= rmine which Apps' flows should egress. Segment Routing can be used to steer packets (or path) to traverse the expl= icit egress node, or explicit segments through the SR Domain based on the S= LA requested by the SD-WAN head-end nodes. When the SDWAN edge nodes are directly connected to the PEs of SR domain, i= s it appropriate for SDWAN edge nodes to use GRE/VxLAN header bits to indic= ate the desired SR Path? We are looking for feedback, criticisms, or suggestion on the the proposed = approach. Thank you, Linda --_000_MN2PR13MB35821DA403CCE784CB3B065D85F60MN2PR13MB3582namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

SD-WAN, as described by ONUG (Open Network User Grou= p), is about pooling WAN bandwidth from multiple service providers to get b= etter WAN bandwidth management, visibility & control.

Because of the ephemeral property of the selected Cl= oud DCs, an enterprise or its network service provider may not have the dir= ect links to the Cloud DCs that are optimal for hosting the enterprise̵= 7;s specific workloads/Apps. Under those circumstances, SD-WAN is a very flexible choice to interconnect the enterp= rise on-premises data centers & branch offices to its desired Cloud DCs= .

However, SD-WAN paths over public internet can have = unpredictable performance, especially over long distances and cross state/c= ountry boundaries. Therefore, it is highly desirable to place as much as po= ssible the portion of SD-WAN paths over service provider VPN (e.g. enterprise’s existing VPN) that have= guaranteed SLA and to minimize the distance/segments over public internet.=

 

https://datatracker.ietf.org/doc/draft= -dunbar-sr-sdwan-over-hybrid-networks/ describes a method to enforce a = SD-WAN path’s head-end selected route traversing through a list of specific nodes of multiple network segments w= ithout requiring the nodes in each network segments to have the intelligenc= e (or maintaining states) of selecting next hop or next segments.

 

When a SR domain has multiple PEs = with ports facing the external networks (such as the public internet= or LTE termination), SD-WAN paths can traverse the SR domain via different= ingress/egress PEs resulting in different E2E performance.

 

Even with the same ingress/egress,= some flows may need different segments across the SR Domain. It is not pra= ctical, or even possible, for PEs to determine which Apps’ flows shou= ld egress.

Segment Routing can be used to ste= er packets (or path) to traverse the explicit egress node, or explicit segm= ents through the SR Domain based on the SLA requested by the SD-WAN head-en= d nodes.

 

When the SDWAN edge nodes are dire= ctly connected to the PEs of SR domain, is it appropriate for SDWAN edge no= des to use GRE/VxLAN header bits to indicate the desired SR Path?

 

We are looking for feedback, criti= cisms, or suggestion on the the proposed approach.

 

Thank you,

Linda  

--_000_MN2PR13MB35821DA403CCE784CB3B065D85F60MN2PR13MB3582namp_-- From nobody Mon Jul 8 15:21:53 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B009E12034F for ; Mon, 8 Jul 2019 15:21:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.999 X-Spam-Level: X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=futurewei.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 TLxiGPau_z5A for ; Mon, 8 Jul 2019 15:21:39 -0700 (PDT) Received: from NAM02-SN1-obe.outbound.protection.outlook.com (mail-eopbgr770112.outbound.protection.outlook.com [40.107.77.112]) (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 A2ECA1201D0 for ; Mon, 8 Jul 2019 15:21:39 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=LMRGFX00KhQ2eJ6bswTAC6G6CPgAwk0KvmpHrl37z8xIZNta+q8K3i+Trgk3snb2ODyegKGYS2QFTwhh1FUnlGgjzYxwG1EqOy/JQHQTA2ty0AFYs3uPgWmYWKR45uUFvlpzWQHOH+/tI0F+NQgV/HGHZjZjdOMqkFo/793WxOJDfyJFLDvtapSU+jpcPYh38WX2xxxS1aMNHEBl7cubE5I2fdaFZ4xJGCXZQgZTbEq3WhR7YLgZ6i8fKspn2dTEUMcIhJUoWnyHVENF98PBqYOmqV3EHan0UzeMoU8LvUZ6MVHVnoB7rbkHpsGpc4cifcNXOrlYDnRYFchbmEUQGQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=2Nr7QVmuPH0ogNW7yHTLPHBcq97B5ueXU9O1TsGm2ts=; b=Rs/ITzE3C4IZhKkCou818P+zqKKQ/AW3ODcC5PbLl5D2SCMt4gf/364fM/WJzGXMePHnMG1U6lPQDLu5uol1tYs60gSn0n9Boc0MNIj5T1js/72q8E9MFInZtLl/xsBq74AbvptTA3y2kcL6Y5XNf0y/QqLmhV8f3FTphRi6Qpb4Ci4sOCQDwSRF8kN6zrc5pD/RPfsOvDVsYTR9NVVnt9NsWzW60ICON9bctO3G+PMpx2JGTU0UxLG4eDJerbaD+UZiWUd+FE0qLalVgL+UdEKMA9RA0VMocr/H4CDZ05Y2FmDZO7SZ3iBZnA6CBcEqUK29Jo3FqnkkeqscNAsTDA== ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=futurewei.com;dmarc=pass action=none header.from=futurewei.com;dkim=pass header.d=futurewei.com;arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Futurewei.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=2Nr7QVmuPH0ogNW7yHTLPHBcq97B5ueXU9O1TsGm2ts=; b=k3355zR1y+xEEmbDSPpWg+S75A+IF68oC7f2n1FVSzFUEcoqzPVFBTU3UaIftNxE4Jt9zvUYq6rio5lIX5GhhKAOXDqGpRg49XEd9JdKFXSiOssb8SHY5Q6RE4BE1CVttWE9s28gh3YCXKgWQLfVFbJLmW4ehhzQhi5+G/TaPXg= Received: from MN2PR13MB3582.namprd13.prod.outlook.com (10.255.238.139) by MN2PR13MB3008.namprd13.prod.outlook.com (10.255.181.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2073.10; Mon, 8 Jul 2019 22:21:36 +0000 Received: from MN2PR13MB3582.namprd13.prod.outlook.com ([fe80::e068:8461:62d7:e0c1]) by MN2PR13MB3582.namprd13.prod.outlook.com ([fe80::e068:8461:62d7:e0c1%7]) with mapi id 15.20.2073.008; Mon, 8 Jul 2019 22:21:36 +0000 From: Linda Dunbar To: Linda Dunbar , SPRING WG Thread-Topic: Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? Thread-Index: AdU12gZxiC6o7DmCSja15PZWT4zSoAAAVQwA Date: Mon, 8 Jul 2019 22:21:36 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=linda.dunbar@futurewei.com; x-originating-ip: [12.111.81.80] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 69950f95-fc7f-42d1-d91a-08d703f2a3e0 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:MN2PR13MB3008; x-ms-traffictypediagnostic: MN2PR13MB3008: x-ms-exchange-purlcount: 3 x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-forefront-prvs: 00922518D8 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(39850400004)(396003)(376002)(346002)(136003)(366004)(189003)(199004)(74316002)(966005)(73956011)(76116006)(66066001)(606006)(7736002)(5660300002)(2940100002)(446003)(186003)(476003)(478600001)(11346002)(86362001)(26005)(102836004)(76176011)(7696005)(53546011)(6506007)(52536014)(66446008)(66476007)(64756008)(66556008)(25786009)(66946007)(229853002)(66574012)(2906002)(3846002)(6116002)(71200400001)(71190400001)(790700001)(8936002)(8676002)(14444005)(236005)(55016002)(33656002)(486006)(53936002)(81156014)(6436002)(44832011)(81166006)(6306002)(9686003)(256004)(54896002)(110136005)(68736007)(6246003)(316002)(99286004)(14454004); DIR:OUT; SFP:1102; SCL:1; SRVR:MN2PR13MB3008; H:MN2PR13MB3582.namprd13.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: futurewei.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: VCUWS4p0W4Bt1lqClE46viSYrxGk394KcHEHI+ak+UQDr0Tbv8vG346oxYrfz5orTnZIcUj303pbJw51hkfeTb616Ufcqib9ZxdCMmMxLHNkrv+UKWOsHrKylhog6rZIgRxuMgmpJUr5GAXpE9OXE3/a7IIX4tLBFNvExPn/w7odLRYqbea3yt083FRrvsXBlPX6JvG2SUIdnW2SFPYVzWJYgXqxObr3gWYl+uNYjaYiwqkpMKMHkPb+apY8jKQN4I94t9Eus1PsmIB279vd4yZTiXMhFz+oA2EgnNMUNib+B2IFmspAlKeQ/5uwKNUTXpkPftoFo8QcWOG333sbvGGyT2ZxE9KFqmEERYOrzmYG0cwzkDmkmui4JtHXogPTOqJXRPkKKwvRWGc+27f6ryYrr6vBjicYwrQy33W9LhQ= Content-Type: multipart/alternative; boundary="_000_MN2PR13MB3582CAA473AD49E7357B6CD085F60MN2PR13MB3582namp_" MIME-Version: 1.0 X-OriginatorOrg: Futurewei.com X-MS-Exchange-CrossTenant-Network-Message-Id: 69950f95-fc7f-42d1-d91a-08d703f2a3e0 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Jul 2019 22:21:36.1396 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 0fee8ff2-a3b2-4018-9c75-3a1d5591fedc X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ldunbar@futurewei.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR13MB3008 Archived-At: Subject: Re: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jul 2019 22:21:51 -0000 --_000_MN2PR13MB3582CAA473AD49E7357B6CD085F60MN2PR13MB3582namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sorry, I meant to ask: When the SDWAN edge nodes are NOT directly connected to the PEs of SR domai= n, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header bits to i= ndicate the desired SR Path? Linda From: spring On Behalf Of Linda Dunbar Sent: Monday, July 08, 2019 5:11 PM To: SPRING WG Subject: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-ne= tworks: is it appropriate for not-directly connect SDWAN edges to use GRE/V= xLAN header bits to indicate the desired SR path? SD-WAN, as described by ONUG (Open Network User Group), is about pooling WA= N bandwidth from multiple service providers to get better WAN bandwidth man= agement, visibility & control. Because of the ephemeral property of the selected Cloud DCs, an enterprise = or its network service provider may not have the direct links to the Cloud = DCs that are optimal for hosting the enterprise's specific workloads/Apps. = Under those circumstances, SD-WAN is a very flexible choice to interconnect= the enterprise on-premises data centers & branch offices to its desired Cl= oud DCs.. However, SD-WAN paths over public internet can have unpredictable performan= ce, especially over long distances and cross state/country boundaries. Ther= efore, it is highly desirable to place as much as possible the portion of S= D-WAN paths over service provider VPN (e.g. enterprise's existing VPN) that= have guaranteed SLA and to minimize the distance/segments over public inte= rnet. https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-hybrid-networks= / describes a m= ethod to enforce a SD-WAN path's head-end selected route traversing through= a list of specific nodes of multiple network segments without requiring th= e nodes in each network segments to have the intelligence (or maintaining s= tates) of selecting next hop or next segments. When a SR domain has multiple PEs with ports facing the external networks (= such as the public internet or LTE termination), SD-WAN paths can traverse = the SR domain via different ingress/egress PEs resulting in different E2E p= erformance. Even with the same ingress/egress, some flows may need different segments a= cross the SR Domain. It is not practical, or even possible, for PEs to dete= rmine which Apps' flows should egress. Segment Routing can be used to steer packets (or path) to traverse the expl= icit egress node, or explicit segments through the SR Domain based on the S= LA requested by the SD-WAN head-end nodes. When the SDWAN edge nodes are directly connected to the PEs of SR domain, i= s it appropriate for SDWAN edge nodes to use GRE/VxLAN header bits to indic= ate the desired SR Path? We are looking for feedback, criticisms, or suggestion on the the proposed = approach. Thank you, Linda --_000_MN2PR13MB3582CAA473AD49E7357B6CD085F60MN2PR13MB3582namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Sorry, I meant to ask:

 

When the SDWAN edge nodes are NOT directly connected to the PEs of SR domain, is it appropriate fo= r SDWAN edge nodes to use GRE/VxLAN header bits to indicate the desired SR = Path?

 

Linda

 

From: spring <spring-bounces@ietf.org> = On Behalf Of Linda Dunbar
Sent: Monday, July 08, 2019 5:11 PM
To: SPRING WG <spring@ietf.org>
Subject: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hy= brid-networks: is it appropriate for not-directly connect SDWAN edges to us= e GRE/VxLAN header bits to indicate the desired SR path?

 

SD-WAN, as described by ONUG (Open Network User Grou= p), is about pooling WAN bandwidth from multiple service providers to get b= etter WAN bandwidth management, visibility & control.

Because of the ephemeral property of the selected Cl= oud DCs, an enterprise or its network service provider may not have the dir= ect links to the Cloud DCs that are optimal for hosting the enterprise̵= 7;s specific workloads/Apps. Under those circumstances, SD-WAN is a very flexible choice to interconnect the enterp= rise on-premises data centers & branch offices to its desired Cloud DCs= ..

However, SD-WAN paths over public internet can have = unpredictable performance, especially over long distances and cross state/c= ountry boundaries. Therefore, it is highly desirable to place as much as po= ssible the portion of SD-WAN paths over service provider VPN (e.g. enterprise’s existing VPN) that have= guaranteed SLA and to minimize the distance/segments over public internet.=

 

https://datatracker.ietf.org/doc/draft-dunbar= -sr-sdwan-over-hybrid-networks/ describes a method to enforce a SD-WAN path’s head-end selected rout= e traversing through a list of specific nodes of multiple network segments = without requiring the nodes in each network segments to have the intelligen= ce (or maintaining states) of selecting next hop or next segments.

 

When a SR domain has multiple PEs = with ports facing the external networks (such as the public internet= or LTE termination), SD-WAN paths can traverse the SR domain via different= ingress/egress PEs resulting in different E2E performance.

 

Even with the same ingress/egress,= some flows may need different segments across the SR Domain. It is not pra= ctical, or even possible, for PEs to determine which Apps’ flows shou= ld egress.

Segment Routing can be used to ste= er packets (or path) to traverse the explicit egress node, or explicit segm= ents through the SR Domain based on the SLA requested by the SD-WAN head-en= d nodes.

 

When the SDWAN edge nodes are dire= ctly connected to the PEs of SR domain, is it appropriate for SDWAN edge no= des to use GRE/VxLAN header bits to indicate the desired SR Path?

 

We are looking for feedback, criti= cisms, or suggestion on the the proposed approach.

 

Thank you,

Linda  

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KK/UZLI4wOaIJ7sHb3lgomURX4cEfH2yPj85rjUoGjD5pda/YgEyglyx85nUfzzYnhEgbX7SHxxeayHwLaZbBNKkTuEVJFTdoHNM3Ltp+Vm8H3xRfx4+uzX9HpUXm626HwBvS0cz8fw75HrzfLwFzdpSA7sF3abcrgVWocYVXEH9hEMsZYaDoxDCS3XqsHINryRhnhRJ5qzyxWTMVttxYIkmCJ2vwPc89dThfkwFXgSA/4mKMWUQrQvHsxdF9j1szy/jVlANX9HuCUQ00mKwZ1lg3But7a1ltJ8HNgGjgbZCpVfLQSrnqqp5iXIuyfPFxSMbtb33pm3vErToIEDGWl7SnOXG30L3F/pX6kXNo40xXUyPLNRmup3bwicht6Fnx1AMOkJSLffvoxo+HWep2e3qlbDFuivJ97TucZnQeeA= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-Network-Message-Id: ec6cfb52-e7d1-40da-1354-08d703f3abe2 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Jul 2019 22:28:58.8482 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: rbonica@juniper.net X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR05MB4679 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-08_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907080276 Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jul 2019 22:29:20 -0000 Qm9iLA0KDQpTUiBlbmNvZGluZ3MgdGhhdCByZXF1aXJlIDEyOC1ieXRlcyBvZiBvdmVyaGVhZCBj b25zdW1lIGV4Y2Vzc2l2ZSBiYW5kd2lkdGg6DQoNCi0gb24gbmV0d29yayBsaW5rcw0KLSBpbiBB 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LS0tLS0tDQo= From nobody Mon Jul 8 15:47:51 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4358C120342; Mon, 8 Jul 2019 15:47:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.679 X-Spam-Level: X-Spam-Status: No, score=-1.679 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, MISSING_HEADERS=1.021, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=joelhalpern.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2mkcJc4A8hal; Mon, 8 Jul 2019 15:47:34 -0700 (PDT) Received: from maila2.tigertech.net (maila2.tigertech.net [208.80.4.152]) (using TLSv1.2 with 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with ESMTPSA id 45jLF05YynzKmqn; Mon, 8 Jul 2019 15:47:32 -0700 (PDT) Cc: SPRING WG , IPv6 List References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> From: "Joel M. Halpern" Message-ID: <51d7094b-dbc2-a490-12af-8f8ae2f597db@joelhalpern.com> Date: Mon, 8 Jul 2019 18:47:31 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jul 2019 22:47:44 -0000 While one can argue forever abotu where the critical points are, I think we all know that all other things being equal (yeah, I know, they never are) smaller is better. It thus seems clear to me that we should simply mandate support for both 16 and 32 bit SIDs in the CRH. Yours, Joel On 7/8/19 6:28 PM, Ron Bonica wrote: > Bob, > > SR encodings that require 128-bytes of overhead consume excessive bandwidth: > > - on network links > - in ASICS > > While the former is interesting, the later is probably more significant. In order to process at high speeds, ASICs need to access the entire IPv6 header chain. So, they copy the header chain, including all extension headers, from buffer memory to on-chip memory. As the number of bytes in the header chain increases, so does the cost of that copy. And the longer the header chain, the less accessible the technology becomes to low-cost ASICs. > > So, the most significant benefit may be in keeping that copy under 128 bytes. > > Ron > > > > > > Juniper Business Use Only > > -----Original Message----- > From: Bob Hinden > Sent: Saturday, July 6, 2019 5:42 PM > To: Ron Bonica > Cc: Bob Hinden ; Mark Smith ; Tom Herbert ; SPRING WG ; IPv6 List > Subject: Re: Comments on draft-bonica-spring-srv6-plus > > Ron, > >> On Jul 6, 2019, at 2:05 PM, Ron Bonica wrote: >> >> Hi Mark, >> >> In my experience, operators object when SR overhead consumes more than 80 bytes. Also, I have encountered two classes of operator: > > What is special about 80? Why not 64, 128, 256? > > Bob > > >> >> • Those who avoid strictly-routed segments >> • Those who rely heavily on strictly-routed segments >> >> Those who avoid strictly-routed segments rarely generate SID Lists that contain more than 8 entries. So, they are generally OK with 32-bit encoding. This is because with 32-bit encoding, the total SR overhead is exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the CRH). >> >> By contrast, those who rely on strictly-routed segments regularly generate SID Lists that contain more than 8 entries. So, they are generally required 16-bit encoding. >> >> IMHO, the operator understands its needs better than we do. We should support both. Let the operator decide at run time. >> >> >> Ron >> >> >> From: Mark Smith >> Sent: Wednesday, July 3, 2019 9:08 PM >> To: Tom Herbert >> Cc: Ron Bonica ; SPRING WG ; >> 6man WG >> Subject: Re: Comments on draft-bonica-spring-srv6-plus >> >> >> >> On Thu., 4 Jul. 2019, 06:06 Tom Herbert, wrote: >> On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica wrote: >>> >>> Hi Tom, >>> >>> Thanks for the review. >>> >>> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will contain a section on mutability. It will say: >>> >>> - the Segments Left field is mutable >>> - every other field in the CRH is immutable >>> >>> I will also update draft-bonica-6man-vpn-dest-opt and draft-bonica-6man-seg-end-opt. Both of those request an IANA option type with the CHG bit equal to 0. So they are both immutable. >>> >>> SID encoding isn't entirely opportunistic. Since the last IETF, we realized that it would be burdensome for every vendor to support all three SID lengths. So, we said that implementations MUST support 32-bit encoding and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely). >> >> This sounds dicey from an interoperability and flexibility point of >> view. Supposed I've deployed a network where everyone is using 16 bits >> SIDs. But, then for some reason I need to switch vendors for a small >> part of the network and their implementation doesn't support 16 bits. >> Do I need to up the MSV and make all SIDs to be 32 bits just on the >> off chance that one of the new nodes might be in some SID list? >> >>> >>> A side effect of this decision is that a node should only send CRH's with 16-bit encoding every other node in the domain supports 16-bit encoding.. So, network operators will need to configure the SID length on each node, with the default being 32. >> >> Well, in light the above problem, I have to wonder if it's better to >> only support 32 bits. The leap from 128 bits to 32 bits is much more >> consequential than going from 32 to 16 bits. Other than that, it >> simplifies the protocol, reduces support and test matrix, ensures >> interoperability, etc. >> >> One single size is much better. >> >> I think most people will pick the larger size, regardless of their functional SID space need, to avoid the possibility of getting it wrong and then having to do a lot of after hours and possibly service impacting work in the future to expand from the smaller to larger size. >> >> Implementations would also be simpler, so less opportunities for implementation bugs. >> >> It also means no possibility of configuration errors because the size is a constant rather than a settable parameter. >> >> A lot of the principles in RFC 5505 - "Principles of Internet Host Configuration" - seem to me to be equally applicable to network interior protocols. >> >> For example, I think the whole of "2.1. Minimize Configuration" fully applies here. >> >> Regards, >> Mark. >> >> >> >> >> Tom >> >>> >>> >>> Ron >>> >>> >>> >>> Juniper Business Use Only >>> >>> -----Original Message----- >>> From: Tom Herbert >>> Sent: Wednesday, July 3, 2019 2:48 PM >>> To: Ron Bonica >>> Cc: SPRING WG ; 6man WG >>> Subject: Comments on draft-bonica-spring-srv6-plus >>> >>> Hi Ron, >>> >>> Thanks for the draft. >>> >>> I think the name SRV6+ might be a little misleading in that it could >>> be misinterpreted as SRV6+ being a superset of SRV6. Specifically, >>> SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so >>> the primary function (and implementation) of SRV6 isn't compatible. It doesn't seem like it would be that much effort to allow a 128 bit SID size to be compatible. >>> >>> I don't understand the rationale for needing a MSV to be explictly configured throughout the domain. Couldn't the appropriate SID size be chosen by the sender at run time. For instance, if all the SIDs in a list are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are used (I assume 16 and 32 bit SIDs are in same number space). >>> Since CRH has the bits stating the SID length there is no ambiguity at the receiver. SID compression is opportunistic and it's always good practice to avoid situations that require wide scale renumbering. >>> >>> Please add a section on mutability requirements of protocol fields so that there is no ambiguity. >>> >>> Tom >> >> -------------------------------------------------------------------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >> -------------------------------------------------------------------- >> >> Juniper Business Use Only >> -------------------------------------------------------------------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >> -------------------------------------------------------------------- > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > From nobody Mon Jul 8 22:28:43 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2076C120314; Mon, 8 Jul 2019 22:28:41 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.703 X-Spam-Level: X-Spam-Status: No, score=-0.703 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, PDS_NO_HELO_DNS=1.295, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nrgGGg_PXmBo; Mon, 8 Jul 2019 22:28:38 -0700 (PDT) Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) (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 8B8A3120326; Mon, 8 Jul 2019 22:28:38 -0700 (PDT) Received: by mail-wm1-x32f.google.com with SMTP id v15so1665601wml.0; Mon, 08 Jul 2019 22:28:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=5VUbp6buNDTl93ytRekQ9vh3rKbJO5AAVHU/+/pVjuQ=; b=AgfZEPj1nOgCDRqcMvIf42y0jEG0x3QyHMIF4X83FxdgRbjD/Dp8N+Ng7fVoFtcnSf 6F+s7TaFZc1HHTMWI9jYZxomBj/7ZAHNkryf9in6nfIwPfrT9ksanM9uHcxytp4sLDeu 5LPHc/QXOjVX1VaC1SFRMUlFB66b2fABLmBkuWrUF+3GT5U7/yDWVFCqgvh3gzS6t0GC CnfVgvxC7Z0JVHqO1dzx9qmseYoWDX+IcUa+73LAVkJDxlxlg7bPmKBHIoI38r/IXQ5/ 8zKDB4oxsQyILwoQUfSsxV6z8nCDLAfWak6xNoYw6FnCxpP2XB7DVlcq/E9Jn5TQFHrz fyLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=5VUbp6buNDTl93ytRekQ9vh3rKbJO5AAVHU/+/pVjuQ=; b=lAMIydnlEXUCWY+k6tD5dCd1GowgTm+3UkibYQ7jFADVngJLd9QZEdDk9OkExIhxK9 cdZPFBnmgAW+gYe/nOEJoJS5cZ3V6m74AkAA5MhUegbjMsp4vKYfpVx4wd6IKKmrXv8H djOANRxs7QEcWLYCROKea534R2RvrON8zjQQ8c1s2ZCnsMYX30BYuyRdHmS8QIHO741R ZO0c9e9erjKkn1dfmI1qV5dbMeQ7/BwsUNLhMz8Bf9/L1UAuF5CrrZaKRYDkUsZ68f9m uYp1Fj7v9i39yaipmt9Z0pKLz2BbxG5TqLEtz+gEubNeOBDglnYsh/c4YBQTS+0vqEOR F7Rw== X-Gm-Message-State: APjAAAU6wRi2NYAlmyAYf+rMug7MfL2ItghfT0UIVX8bc3uwR42aNQAL W9dexapnlfWO2ExhSTbwl/0= X-Google-Smtp-Source: APXvYqzfRdcBVDy0OAjPau1lYW1zoaHm8WCudsXHSbwunOA7OXIj3OHifRZKTq0wF1COZsDc/Mmfqw== X-Received: by 2002:a7b:c051:: with SMTP id u17mr19426957wmc.25.1562650116969; Mon, 08 Jul 2019 22:28:36 -0700 (PDT) Received: from [10.0.0.199] (c-24-5-53-184.hsd1.ca.comcast.net. [24.5.53.184]) by smtp.gmail.com with ESMTPSA id w7sm1262973wmc.46.2019.07.08.22.28.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 08 Jul 2019 22:28:36 -0700 (PDT) From: Bob Hinden Message-Id: <3DC7DA1F-AEB4-4DCD-8486-590C23C23CDF@gmail.com> Content-Type: multipart/signed; boundary="Apple-Mail=_363C1305-1CB9-4DCB-A321-C5E5B4E33D21"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Mon, 8 Jul 2019 22:28:31 -0700 In-Reply-To: Cc: Bob Hinden , Mark Smith , Tom Herbert , SPRING WG , IPv6 List To: Ron Bonica References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Jul 2019 05:28:41 -0000 --Apple-Mail=_363C1305-1CB9-4DCB-A321-C5E5B4E33D21 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Ron, > On Jul 8, 2019, at 3:28 PM, Ron Bonica wrote: >=20 > Bob, >=20 > SR encodings that require 128-bytes of overhead consume excessive = bandwidth: >=20 > - on network links > - in ASICS >=20 > While the former is interesting, the later is probably more = significant. In order to process at high speeds, ASICs need to access = the entire IPv6 header chain. So, they copy the header chain, including = all extension headers, from buffer memory to on-chip memory. As the = number of bytes in the header chain increases, so does the cost of that = copy. And the longer the header chain, the less accessible the = technology becomes to low-cost ASICs. >=20 > So, the most significant benefit may be in keeping that copy under = 128 bytes. So there is nothing special about 80 when you said "operators object = when SR overhead consumes more than 80 bytes=E2=80=9D other than it is = less than 128 (or some other implementation specific number). Bob >=20 > = Ron >=20 >=20 >=20 >=20 >=20 > Juniper Business Use Only >=20 > -----Original Message----- > From: Bob Hinden > Sent: Saturday, July 6, 2019 5:42 PM > To: Ron Bonica > Cc: Bob Hinden ; Mark Smith = ; Tom Herbert ; SPRING WG = ; IPv6 List > Subject: Re: Comments on draft-bonica-spring-srv6-plus >=20 > Ron, >=20 >> On Jul 6, 2019, at 2:05 PM, Ron Bonica = wrote: >>=20 >> Hi Mark, >>=20 >> In my experience, operators object when SR overhead consumes more = than 80 bytes. Also, I have encountered two classes of operator: >=20 > What is special about 80? Why not 64, 128, 256? >=20 > Bob >=20 >=20 >>=20 >> =E2=80=A2 Those who avoid strictly-routed segments >> =E2=80=A2 Those who rely heavily on strictly-routed segments >>=20 >> Those who avoid strictly-routed segments rarely generate SID Lists = that contain more than 8 entries. So, they are generally OK with 32-bit = encoding. This is because with 32-bit encoding, the total SR overhead is = exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for = the CRH). >>=20 >> By contrast, those who rely on strictly-routed segments regularly = generate SID Lists that contain more than 8 entries. So, they are = generally required 16-bit encoding. >>=20 >> IMHO, the operator understands its needs better than we do. We should = support both. Let the operator decide at run time. >>=20 >>=20 >> Ron >>=20 >>=20 >> From: Mark Smith >> Sent: Wednesday, July 3, 2019 9:08 PM >> To: Tom Herbert >> Cc: Ron Bonica ; SPRING WG ; >> 6man WG >> Subject: Re: Comments on draft-bonica-spring-srv6-plus >>=20 >>=20 >>=20 >> On Thu., 4 Jul. 2019, 06:06 Tom Herbert, wrote: >> On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica = wrote: >>>=20 >>> Hi Tom, >>>=20 >>> Thanks for the review. >>>=20 >>> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will = contain a section on mutability. It will say: >>>=20 >>> - the Segments Left field is mutable >>> - every other field in the CRH is immutable >>>=20 >>> I will also update draft-bonica-6man-vpn-dest-opt and = draft-bonica-6man-seg-end-opt. Both of those request an IANA option type = with the CHG bit equal to 0. So they are both immutable. >>>=20 >>> SID encoding isn't entirely opportunistic. Since the last IETF, we = realized that it would be burdensome for every vendor to support all = three SID lengths. So, we said that implementations MUST support 32-bit = encoding and MAY support 16 bit encoding. (We dropped 8-bit encoding = entirely). >>=20 >> This sounds dicey from an interoperability and flexibility point of >> view. Supposed I've deployed a network where everyone is using 16 = bits >> SIDs. But, then for some reason I need to switch vendors for a small >> part of the network and their implementation doesn't support 16 bits. >> Do I need to up the MSV and make all SIDs to be 32 bits just on the >> off chance that one of the new nodes might be in some SID list? >>=20 >>>=20 >>> A side effect of this decision is that a node should only send CRH's = with 16-bit encoding every other node in the domain supports 16-bit = encoding.. So, network operators will need to configure the SID length = on each node, with the default being 32. >>=20 >> Well, in light the above problem, I have to wonder if it's better to >> only support 32 bits. The leap from 128 bits to 32 bits is much more >> consequential than going from 32 to 16 bits. Other than that, it >> simplifies the protocol, reduces support and test matrix, ensures >> interoperability, etc. >>=20 >> One single size is much better. >>=20 >> I think most people will pick the larger size, regardless of their = functional SID space need, to avoid the possibility of getting it wrong = and then having to do a lot of after hours and possibly service = impacting work in the future to expand from the smaller to larger size. >>=20 >> Implementations would also be simpler, so less opportunities for = implementation bugs. >>=20 >> It also means no possibility of configuration errors because the size = is a constant rather than a settable parameter. >>=20 >> A lot of the principles in RFC 5505 - "Principles of Internet Host = Configuration" - seem to me to be equally applicable to network interior = protocols. >>=20 >> For example, I think the whole of "2.1. Minimize Configuration" fully = applies here. >>=20 >> Regards, >> Mark. >>=20 >>=20 >>=20 >>=20 >> Tom >>=20 >>>=20 >>>=20 >>> Ron >>>=20 >>>=20 >>>=20 >>> Juniper Business Use Only >>>=20 >>> -----Original Message----- >>> From: Tom Herbert >>> Sent: Wednesday, July 3, 2019 2:48 PM >>> To: Ron Bonica >>> Cc: SPRING WG ; 6man WG >>> Subject: Comments on draft-bonica-spring-srv6-plus >>>=20 >>> Hi Ron, >>>=20 >>> Thanks for the draft. >>>=20 >>> I think the name SRV6+ might be a little misleading in that it could >>> be misinterpreted as SRV6+ being a superset of SRV6. Specifically, >>> SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so >>> the primary function (and implementation) of SRV6 isn't compatible. = It doesn't seem like it would be that much effort to allow a 128 bit SID = size to be compatible. >>>=20 >>> I don't understand the rationale for needing a MSV to be explictly = configured throughout the domain. Couldn't the appropriate SID size be = chosen by the sender at run time. For instance, if all the SIDs in a = list are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs = are used (I assume 16 and 32 bit SIDs are in same number space). >>> Since CRH has the bits stating the SID length there is no ambiguity = at the receiver. SID compression is opportunistic and it's always good = practice to avoid situations that require wide scale renumbering. >>>=20 >>> Please add a section on mutability requirements of protocol fields = so that there is no ambiguity. >>>=20 >>> Tom >>=20 >> -------------------------------------------------------------------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >> -------------------------------------------------------------------- >>=20 >> Juniper Business Use Only >> -------------------------------------------------------------------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >> -------------------------------------------------------------------- --Apple-Mail=_363C1305-1CB9-4DCB-A321-C5E5B4E33D21 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: 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------=ALIBOUNDARY_896_4ba53940_5d2437ff_13debdb-- From nobody Tue Jul 9 02:09:09 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5EF0F1203C7 for ; Tue, 9 Jul 2019 02:09:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bZy71vqnh79V for ; Tue, 9 Jul 2019 02:09:03 -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 C3C321203BB for ; Tue, 9 Jul 2019 02:09:02 -0700 (PDT) Received: from lhreml707-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 4F092BFA8CC4378C7B11 for ; Tue, 9 Jul 2019 10:09:00 +0100 (IST) Received: from NKGEML414-HUB.china.huawei.com (10.98.56.75) by lhreml707-cah.china.huawei.com (10.201.108.48) with Microsoft SMTP Server (TLS) id 14.3.408.0; Tue, 9 Jul 2019 10:08:59 +0100 Received: from NKGEML514-MBX.china.huawei.com ([fe80::40a8:f0d:c0f3:2ca5]) by nkgeml414-hub.china.huawei.com ([10.98.56.75]) with mapi id 14.03.0415.000; Tue, 9 Jul 2019 17:08:47 +0800 From: Xiejingrong To: "spring@ietf.org" Thread-Topic: Comments on draft-voyer-spring-sr-p2mp-policy-03 Thread-Index: AdU2LwF7Q7JE5HByT0K+NXwhnsJRlg== Date: Tue, 9 Jul 2019 09:08:47 +0000 Message-ID: <16253F7987E4F346823E305D08F9115AAB8DC4C0@nkgeml514-mbx.china.huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.217.214] Content-Type: multipart/alternative; boundary="_000_16253F7987E4F346823E305D08F9115AAB8DC4C0nkgeml514mbxchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] Comments on draft-voyer-spring-sr-p2mp-policy-03 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Jul 2019 09:09:06 -0000 --_000_16253F7987E4F346823E305D08F9115AAB8DC4C0nkgeml514mbxchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I have a few comments on draft-voyer-spring-sr-p2mp-policy-03: A Point-to-Multipoint service delivery could be via Ingress Replication (aka Spray in some SR context), i.e., the root unicasts individual copies of traffic to each leaf. The corresponding P2MP segment consists of replication segments only for the root and the leaves. A Point-to-Multipoint service delivery could also be via Downstream Replication (aka TreeSID in some SR context), i.e., the root and some downstream replication nodes replicate the traffic along the way as it traverses closer to the leaves. Notice that Spray is actually a special form of TreeSID. Also notice that, the explicit path from the root or a replication node to a leaf or a downstream replication node can optionally be partially or completely specified by the controller or determined locally. [XJR] There have been clear concepts of Ingress-Replication and P2MP alread= y in the decades of multicast technology. Is Spray/TreeSID more clear than = them? 2. SR Replication Policy An SR Replication policy is a variant of an SR policy [I-D.ietf- spring-segment-routing-policy]. A replication policy corresponds to a replication segment, which defines the forwarding behavior on a particular node on a particular P2MP segment. An SR Replication Policy can be either provisioned locally or programmed by a controller. An SR Replication Policy is identified through the tuple . [XJR] I don't see where the key of a SR-policy IMO, the color is. Is it sti= ll a variant of SR-policy ? An SR P2MP policy can be either provisioned locally or programmed by a controller onto the root node of the segment, for the purpose of steering traffic into the segment. A controller calculates the tree and program corresponding replication segments on root, leaves and optional replication nodes. [XJR] There is already overmuch of P2MP-building protocols like PIM, mLDP, = RSVP-TE. What's the meaning of inventing a new one? Traffic is steered into a SR P2MP Policy in two ways: o Based on a local policy-based routing at the Root node. o Based on remote classification and steering via the BSID of the SR P2MP Policy at the Root node. Traffic is then forwarded toward the leaves following the replication segments. [XJR] How is the forwarding procedure? For a packet P1, one replicate to A = using IPv6/SRv6/SRH encapsulation, and replicate to B using another IPv6/SR= v6/SRH encapsulation ? How about the cost ? Will that be done in hardware o= r software ? 4. Using Controller to build a P2MP Segment A P2MP segment can be built using a Path Computation Element (PCE) and PCE Protocol (PCEP). This section outlines a high-level architecture for such an approach. 4.1. SR P2MP Policy Creation A SR P2MP policy can be instantiated and maintained in a centralized fashion using a Path Computation Element (PCE). [XJR] Is this relevant to SR-Policy ? things using PCE with some SID-List c= onfiguration is not SR-policy variant IMO. 4.1.1. API North-bound APIs on a PCE can be used to: 1. Create P2MP SR policy 2. Delete P2MP SR policy 3. Update P2MP SR policy [XJR] SR-Policy has named North-bound APIs? I did not found one in draft-ie= tf-idr-segment-routing-te-policy. 4.4. Protection 4.4.1. Local Protection A network link/node on the tree of a P2MP segment can be protected using SR policies computed by PCE. The backup SR policies shall be programmed in forwarding plane in order to minimize traffic loss when the protected link/node fails. [XJR] When does such protection take effect? When a link fail or before a l= ink fail? How if some link or device is added ? re-optimization & MBB ? 4.4.2. Path Protection It is possible for PCE create a disjoint backup tree for providing end-to-end path protection. [XJR] Suppose A---C/D/E, use the P2MP mentioned above, how does one provide= end-to-end path protection? Using what OAM method to detect failure? [XJR] Maybe the first question is, P2MP seems not a work in SPRING. Is it? = There are WGs PIM/MBONED/BIER specialized on all kinds of multicast. Thanks Jingrong --_000_16253F7987E4F346823E305D08F9115AAB8DC4C0nkgeml514mbxchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

I have a few comments on draft-voyer-spring-s= r-p2mp-policy-03:

 

   A Point-to-Multipoint service del= ivery could be via Ingress

   Replication (aka Spray in some SR= context), i.e., the root unicasts

   individual copies of traffic to e= ach leaf.  The corresponding P2MP

   segment consists of replication s= egments only for the root and the

   leaves.

 

   A Point-to-Multipoint service del= ivery could also be via Downstream

   Replication (aka TreeSID in some = SR context), i.e., the root and some

   downstream replication nodes repl= icate the traffic along the way as

   it traverses closer to the leaves= .

 

   Notice that Spray is actually a s= pecial form of TreeSID.  Also notice

   that, the explicit path from the = root or a replication node to a leaf

   or a downstream replication node = can optionally be partially or

   completely specified by the contr= oller or determined locally.

[XJR] There have been clear concepts of Ingre= ss-Replication and P2MP already in the decades of multicast technology. Is Spray/TreeSID more clear than them?

 

2.  SR Replication Policy

 

   An SR Replication policy is a var= iant of an SR policy [I-D.ietf-

   spring-segment-routing-policy].&n= bsp; A replication policy corresponds to

   a replication segment, which defi= nes the forwarding behavior on a

   particular node on a particular P= 2MP segment.

   An SR Replication Policy can be e= ither provisioned locally or

   programmed by a controller.<= /o:p>

   An SR Replication Policy is ident= ified through the tuple <Node-ID,

   Root, Tree-ID>.

[XJR] I don’t see where the key of a SR= -policy IMO, the color is. Is it still a variant of SR-policy ?

 

   An SR P2MP policy can be either p= rovisioned locally or programmed by

   a controller onto the root node o= f the segment, for the purpose of

   steering traffic into the segment= .  A controller calculates the tree

   and program corresponding replica= tion segments on root, leaves and

   optional replication nodes.<= /o:p>

[XJR] There is already overmuch of P2MP-build= ing protocols like PIM, mLDP, RSVP-TE. What’s the meaning of inventing a new one?

 

   Traffic is steered into a SR P2MP= Policy in two ways:

 

   o  Based on a local policy-b= ased routing at the Root node.

 

   o  Based on remote classific= ation and steering via the BSID of the SR

      P2MP Policy at = the Root node.

 

   Traffic is then forwarded toward = the leaves following the replication

   segments.

[XJR] How is the forwarding procedure? For a = packet P1, one replicate to A using IPv6/SRv6/SRH encapsulation, and replicate to B using another IPv6/SRv6/SRH encapsulation ? How about t= he cost ? Will that be done in hardware or software ?

 

4.  Using Controller to build a P2MP Segm= ent

 

   A P2MP segment can be built using= a Path Computation Element (PCE)

   and PCE Protocol (PCEP).  Th= is section outlines a high-level

   architecture for such an approach= .

=  

4.1.  SR P2MP Policy Creation<= /span>

 

   A SR P2MP policy can be instantia= ted and maintained in a centralized

   fashion using a Path Computation = Element (PCE).

[XJR] Is this relevant to SR-Policy ? things = using PCE with some SID-List configuration is not SR-policy variant IMO.

 

4.1.1.  API

   North-bound APIs on a PCE can be = used to:

   1.  Create P2MP SR policy

   2.  Delete P2MP SR policy

   3.  Update P2MP SR policy

[XJR] SR-Policy has named North-bound APIs? I= did not found one in draft-ietf-idr-segment-routing-te-policy.

 

4.4.  Protection

4.4.1.  Local Protection

   A network link/node on the tree o= f a P2MP segment can be protected

   using SR policies computed by PCE= .  The backup SR policies shall be

   programmed in forwarding plane in= order to minimize traffic loss when

   the protected link/node fails.

[XJR] When does such protection take effect? = When a link fail or before a link fail? How if some link or device is added ? re-optimization & MBB ?

 

4.4.2.  Path Protection=

   It is possible for PCE create a d= isjoint backup tree for providing

   end-to-end path protection.<= /o:p>

[XJR] Suppose A---C/D/E, use the P2MP mention= ed above, how does one provide end-to-end path protection? Using what OAM method to detect failure?

=  

=  

[XJR] Maybe the first question is, P2MP seems= not a work in SPRING. Is it? There are WGs PIM/MBONED/BIER specialized on all kinds of multicast.

=  

=  

Thank= s

Jingr= ong

=  

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bT02aEJHelNqZDhnV1o4VGJtSUU5LWF4S3FzR1NPU19lREJ2YlNWSlFWWkJvJnM9WVlYb1p4QmZk VnhtY1hpTy10Rmt6QldrbkE1UnJFekF6X0lRVFAxdnlfMCZlPSANCg== From nobody Tue Jul 9 06:37:19 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 80F18120164; Tue, 9 Jul 2019 06:37:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.798 X-Spam-Level: X-Spam-Status: No, score=0.798 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, FROM_LOCAL_NOVOWEL=0.5, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, HTML_MESSAGE=0.001, PDS_NO_HELO_DNS=1.295, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from 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SMTP id k19mr27199oij.164.1562679425277; Tue, 09 Jul 2019 06:37:05 -0700 (PDT) MIME-Version: 1.0 References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> <51d7094b-dbc2-a490-12af-8f8ae2f597db@joelhalpern.com> In-Reply-To: From: Mark Smith Date: Tue, 9 Jul 2019 23:36:52 +1000 Message-ID: To: Ron Bonica Cc: "Joel M. Halpern" , SPRING WG , IPv6 List Content-Type: multipart/alternative; boundary="0000000000000aa25f058d3fa88a" Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Jul 2019 13:37:10 -0000 --0000000000000aa25f058d3fa88a Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Ron, On Tue., 9 Jul. 2019, 23:01 Ron Bonica, wrote: > Mark, Tom, > > Would mandating both satisfy your objections? > Well enough. I still prefer the idea of a single size, however at least requiring support for both sizes would avoid the trap of unintentionally buying a device that can only do 16 bit SIDs when you're using 32 bit SIDs. That can happen because that detail might be in small print on a spec sheet or missed in an RFI/RFP response. I think 32 bits should be the default SID size, so that people have to make a conscious decision to use 16 bits, and therefore if 16 bits ends up being too small in the future, they hopefully already know they'll be incurring the operational costs and possible customer service impacts of having to change from 16 to 32 SIDs. Regards, Mark. > Ron > > > > Juniper Business Use Only > > -----Original Message----- > From: spring On Behalf Of Joel M. Halpern > Sent: Monday, July 8, 2019 6:48 PM > Cc: SPRING WG ; IPv6 List > Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus > > While one can argue forever abotu where the critical points are, I think > we all know that all other things being equal (yeah, I know, they never > are) smaller is better. > It thus seems clear to me that we should simply mandate support for both > 16 and 32 bit SIDs in the CRH. > > Yours, > Joel > > On 7/8/19 6:28 PM, Ron Bonica wrote: > > Bob, > > > > SR encodings that require 128-bytes of overhead consume excessive > bandwidth: > > > > - on network links > > - in ASICS > > > > While the former is interesting, the later is probably more > significant. In order to process at high speeds, ASICs need to access th= e > entire IPv6 header chain. So, they copy the header chain, including all > extension headers, from buffer memory to on-chip memory. As the number o= f > bytes in the header chain increases, so does the cost of that copy. And t= he > longer the header chain, the less accessible the technology becomes to > low-cost ASICs. > > > > So, the most significant benefit may be in keeping that copy under 128 > bytes. > > > > > > > Ron > > > > > > > > > > > > Juniper Business Use Only > > > > -----Original Message----- > > From: Bob Hinden > > Sent: Saturday, July 6, 2019 5:42 PM > > To: Ron Bonica > > Cc: Bob Hinden ; Mark Smith > > ; Tom Herbert ; SPRING WG > > ; IPv6 List > > Subject: Re: Comments on draft-bonica-spring-srv6-plus > > > > Ron, > > > >> On Jul 6, 2019, at 2:05 PM, Ron Bonica 40juniper.net@dmarc.ietf.org> wrote: > >> > >> Hi Mark, > >> > >> In my experience, operators object when SR overhead consumes more than > 80 bytes. Also, I have encountered two classes of operator: > > > > What is special about 80? Why not 64, 128, 256? > > > > Bob > > > > > >> > >> =E2=80=A2 Those who avoid strictly-routed segments > >> =E2=80=A2 Those who rely heavily on strictly-routed segments > >> > >> Those who avoid strictly-routed segments rarely generate SID Lists tha= t > contain more than 8 entries. So, they are generally OK with 32-bit > encoding. This is because with 32-bit encoding, the total SR overhead is > exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the > CRH). > >> > >> By contrast, those who rely on strictly-routed segments regularly > generate SID Lists that contain more than 8 entries. So, they are general= ly > required 16-bit encoding. > >> > >> IMHO, the operator understands its needs better than we do. We should > support both. Let the operator decide at run time. > >> > >> > > >> Ron > >> > >> > >> From: Mark Smith > >> Sent: Wednesday, July 3, 2019 9:08 PM > >> To: Tom Herbert > >> Cc: Ron Bonica ; SPRING WG ; > >> 6man WG > >> Subject: Re: Comments on draft-bonica-spring-srv6-plus > >> > >> > >> > >> On Thu., 4 Jul. 2019, 06:06 Tom Herbert, wrote: > >> On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica wrote= : > >>> > >>> Hi Tom, > >>> > >>> Thanks for the review. > >>> > >>> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will > contain a section on mutability. It will say: > >>> > >>> - the Segments Left field is mutable > >>> - every other field in the CRH is immutable > >>> > >>> I will also update draft-bonica-6man-vpn-dest-opt and > draft-bonica-6man-seg-end-opt. Both of those request an IANA option type > with the CHG bit equal to 0. So they are both immutable. > >>> > >>> SID encoding isn't entirely opportunistic. Since the last IETF, we > realized that it would be burdensome for every vendor to support all thr= ee > SID lengths. So, we said that implementations MUST support 32-bit encodin= g > and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely). > >> > >> This sounds dicey from an interoperability and flexibility point of > >> view. Supposed I've deployed a network where everyone is using 16 > >> bits SIDs. But, then for some reason I need to switch vendors for a > >> small part of the network and their implementation doesn't support 16 > bits. > >> Do I need to up the MSV and make all SIDs to be 32 bits just on the > >> off chance that one of the new nodes might be in some SID list? > >> > >>> > >>> A side effect of this decision is that a node should only send CRH's > with 16-bit encoding every other node in the domain supports 16-bit > encoding.. So, network operators will need to configure the SID length on > each node, with the default being 32. > >> > >> Well, in light the above problem, I have to wonder if it's better to > >> only support 32 bits. The leap from 128 bits to 32 bits is much more > >> consequential than going from 32 to 16 bits. Other than that, it > >> simplifies the protocol, reduces support and test matrix, ensures > >> interoperability, etc. > >> > >> One single size is much better. > >> > >> I think most people will pick the larger size, regardless of their > functional SID space need, to avoid the possibility of getting it wrong a= nd > then having to do a lot of after hours and possibly service impacting wor= k > in the future to expand from the smaller to larger size. > >> > >> Implementations would also be simpler, so less opportunities for > implementation bugs. > >> > >> It also means no possibility of configuration errors because the size > is a constant rather than a settable parameter. > >> > >> A lot of the principles in RFC 5505 - "Principles of Internet Host > Configuration" - seem to me to be equally applicable to network interior > protocols. > >> > >> For example, I think the whole of "2.1. Minimize Configuration" fully > applies here. > >> > >> Regards, > >> Mark. > >> > >> > >> > >> > >> Tom > >> > >>> > >>> > > >>> Ron > >>> > >>> > >>> > >>> Juniper Business Use Only > >>> > >>> -----Original Message----- > >>> From: Tom Herbert > >>> Sent: Wednesday, July 3, 2019 2:48 PM > >>> To: Ron Bonica > >>> Cc: SPRING WG ; 6man WG > >>> Subject: Comments on draft-bonica-spring-srv6-plus > >>> > >>> Hi Ron, > >>> > >>> Thanks for the draft. > >>> > >>> I think the name SRV6+ might be a little misleading in that it could > >>> be misinterpreted as SRV6+ being a superset of SRV6. Specifically, > >>> SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > >>> the primary function (and implementation) of SRV6 isn't compatible. I= t > doesn't seem like it would be that much effort to allow a 128 bit SID siz= e > to be compatible. > >>> > >>> I don't understand the rationale for needing a MSV to be explictly > configured throughout the domain. Couldn't the appropriate SID size be > chosen by the sender at run time. For instance, if all the SIDs in a list > are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are > used (I assume 16 and 32 bit SIDs are in same number space). > >>> Since CRH has the bits stating the SID length there is no ambiguity a= t > the receiver. SID compression is opportunistic and it's always good > practice to avoid situations that require wide scale renumbering. > >>> > >>> Please add a section on mutability requirements of protocol fields so > that there is no ambiguity. > >>> > >>> Tom > >> > >> -------------------------------------------------------------------- > >> IETF IPv6 working group mailing list > >> ipv6@ietf.org > >> Administrative Requests: > >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_ma= i > >> lman_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDT= XcW > >> zoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8= Tbm > >> IE9-axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g= 4 > >> 8o5Y&e=3D > >> -------------------------------------------------------------------- > >> > >> Juniper Business Use Only > >> -------------------------------------------------------------------- > >> IETF IPv6 working group mailing list > >> ipv6@ietf.org > >> Administrative Requests: > >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_ma= i > >> lman_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDT= XcW > >> zoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8= Tbm > >> IE9-axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g= 4 > >> 8o5Y&e=3D > >> -------------------------------------------------------------------- > > -------------------------------------------------------------------- > > IETF IPv6 working group mailing list > > ipv6@ietf.org > > Administrative Requests: > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mai= l > > man_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXc= Wzo > > CI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8Tbm= IE9 > > -axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g48o5= Y > > &e=3D > > -------------------------------------------------------------------- > > > > _______________________________________________ > spring mailing list > spring@ietf.org > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailm= an_listinfo_spring&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzo= CI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8TbmIE9-= axKqsGSOS_eDBvbSVJQVZBo&s=3DYYXoZxBfdVxmcXiO-tFkzBWknA5RrEzAz_IQTP1vy_0&e= =3D > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --0000000000000aa25f058d3fa88a Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Ron,

On Tue., 9 Jul. 2019, 23:01 Ron Bonica, <r= bonica=3D40juniper.net@dmarc.ietf.org> wrote:
Mark, Tom,

Would mandating both satisfy your objections?
<= div dir=3D"auto">
Well enough.

I still prefer the idea of a single size,= however at least requiring support for both sizes would avoid the trap of = unintentionally buying a device that can only do 16 bit SIDs when you'r= e using 32 bit SIDs. That can happen because that detail might be in small = print on a spec sheet or missed in an RFI/RFP response.

I think 32 bits should be the default SID s= ize, so that people have to make a conscious decision to use 16 bits, and t= herefore if 16 bits ends up being too small in the future, they hopefully a= lready know they'll be incurring the operational costs and possible cus= tomer service impacts of having to change from 16 to 32 SIDs.=C2=A0


Reg= ards,
Mark.



=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Ron



Juniper Business Use Only

-----Original Message-----
From: spring <spring-bounces@ietf.org> On Behalf = Of Joel M. Halpern
Sent: Monday, July 8, 2019 6:48 PM
Cc: SPRING WG <spring@ietf.org>; IPv6 List <ipv6= @ietf.org>
Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus

While one can argue forever abotu where the critical points are, I think we= all know that all other things being equal (yeah, I know, they never
are) smaller is better.
It thus seems clear to me that we should simply mandate support for both 16 and 32 bit SIDs in the CRH.

Yours,
Joel

On 7/8/19 6:28 PM, Ron Bonica wrote:
> Bob,
>
> SR encodings that require 128-bytes of overhead consume excessive band= width:
>
> - on network links
> - in ASICS
>
> While the former is interesting, the later is probably more significan= t.=C2=A0 In order to process at high speeds, ASICs need to access the entir= e IPv6 header chain. So, they copy the header chain, including all extensio= n headers,=C2=A0 from buffer memory to on-chip memory. As the number of byt= es in the header chain increases, so does the cost of that copy. And the lo= nger the header chain, the less accessible the technology becomes to low-co= st ASICs.
>
> So, the most significant benefit may be=C2=A0 in keeping that copy und= er 128 bytes.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0
> Ron
>
>
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Bob Hinden <bob.hinden@gmail.com>
> Sent: Saturday, July 6, 2019 5:42 PM
> To: Ron Bonica <rbonica@juniper.net>
> Cc: Bob Hinden <bob.hinden@gmail.com>; Mark Smi= th
> <markzzzsmith@gmail.com>; Tom Herbert <tom@herbertland.com>; SPRING WG
> <spring@ietf.org>; IPv6 List <ipv6@ietf.org= >
> Subject: Re: Comments on draft-bonica-spring-srv6-plus
>
> Ron,
>
>> On Jul 6, 2019, at 2:05 PM, Ron Bonica <rbonica=3D40juniper.net@dmarc.ietf.org> wrote:
>>
>> Hi Mark,
>>
>> In my experience, operators object when SR overhead consumes more = than 80 bytes. Also, I have encountered two classes of operator:
>
> What is special about 80?=C2=A0 =C2=A0Why not 64, 128, 256?
>
> Bob
>
>
>>
>>=C2=A0 =C2=A0 =C2=A0 =E2=80=A2 Those who avoid strictly-routed segm= ents
>>=C2=A0 =C2=A0 =C2=A0 =E2=80=A2 Those who rely heavily on strictly-r= outed segments
>>
>> Those who avoid strictly-routed segments rarely generate SID Lists= that contain more than 8 entries. So, they are generally OK with 32-bit en= coding. This is because with 32-bit encoding, the total SR overhead is exac= tly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the CRH).=
>>
>> By contrast, those who rely on strictly-routed segments regularly = generate SID Lists that contain more than 8 entries. So, they are generally= required 16-bit encoding.
>>
>> IMHO, the operator understands its needs better than we do. We sho= uld support both. Let the operator decide at run time.
>>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0
>> Ron
>>
>>
>> From: Mark Smith <markzzzsmith@gmail.com>=
>> Sent: Wednesday, July 3, 2019 9:08 PM
>> To: Tom Herbert <tom@herbertland.com>
>> Cc: Ron Bonica <rbonica@juniper.net>; SPRING= WG <spring@ietf.org>;
>> 6man WG <ipv6@ietf.org>
>> Subject: Re: Comments on draft-bonica-spring-srv6-plus
>>
>>
>>
>> On Thu., 4 Jul. 2019, 06:06 Tom Herbert, <tom@herbe= rtland.com> wrote:
>> On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica <rbonica= @juniper.net> wrote:
>>>
>>> Hi Tom,
>>>
>>> Thanks for the review.
>>>
>>> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It wi= ll contain a section on mutability. It will say:
>>>
>>> - the Segments Left field is mutable
>>> - every other field in the CRH is immutable
>>>
>>> I will also update draft-bonica-6man-vpn-dest-opt and draft-bo= nica-6man-seg-end-opt. Both of those request an IANA option type with the C= HG bit equal to 0. So they are both immutable.
>>>
>>> SID encoding isn't entirely opportunistic. Since the last = IETF, we realized that it would be burdensome for every vendor=C2=A0 to sup= port all three SID lengths. So, we said that implementations MUST support 3= 2-bit encoding and MAY support 16 bit encoding. (We dropped 8-bit encoding = entirely).
>>
>> This sounds dicey from an interoperability and flexibility point o= f
>> view. Supposed I've deployed a network where everyone is using= 16
>> bits SIDs. But, then for some reason I need to switch vendors for = a
>> small part of the network and their implementation doesn't sup= port 16 bits.
>> Do I need to up the MSV and make all SIDs to be 32 bits just on th= e
>> off chance that one of the new nodes might be in some SID list? >>
>>>
>>> A side effect of this decision is that a node should only send= CRH's with 16-bit encoding every other node in the domain supports 16-= bit encoding.. So, network operators will need to configure the SID length = on each node, with the default being 32.
>>
>> Well, in light the above problem, I have to wonder if it's bet= ter to
>> only support 32 bits. The leap from 128 bits to 32 bits is much mo= re
>> consequential than going from 32 to 16 bits. Other than that, it <= br> >> simplifies the protocol, reduces support and test matrix, ensures =
>> interoperability, etc.
>>
>> One single size is much better.
>>
>> I think most people will pick the larger size, regardless of their= functional SID space need, to avoid the possibility of getting it wrong an= d then having to do a lot of after hours and possibly service impacting wor= k in the future to expand from the smaller to larger size.
>>
>> Implementations would also be simpler, so less opportunities for i= mplementation bugs.
>>
>> It also means no possibility of configuration errors because the s= ize is a constant rather than a settable parameter.
>>
>> A lot of the principles in RFC 5505 - "Principles of Internet= Host Configuration" - seem to me to be equally applicable to network = interior protocols.
>>
>> For example, I think the whole of "2.1. Minimize Configuratio= n" fully applies here.
>>
>> Regards,
>> Mark.
>>
>>
>>
>>
>> Tom
>>
>>>
>>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0
>>> Ron
>>>
>>>
>>>
>>> Juniper Business Use Only
>>>
>>> -----Original Message-----
>>> From: Tom Herbert <tom@herbertland.com><= br> >>> Sent: Wednesday, July 3, 2019 2:48 PM
>>> To: Ron Bonica <rbonica@juniper.net> >>> Cc: SPRING WG <spring@ietf.org>; 6man WG <= ;ipv6@ietf.org>
>>> Subject: Comments on draft-bonica-spring-srv6-plus
>>>
>>> Hi Ron,
>>>
>>> Thanks for the draft.
>>>
>>> I think the name SRV6+ might be a little misleading in that it= could
>>> be misinterpreted as SRV6+ being a superset of SRV6. Specifica= lly,
>>> SRV6+ doesn't allow 128 bit SIDs which seems inherent in S= RV6 and so
>>> the primary function (and implementation) of SRV6 isn't co= mpatible. It doesn't seem like it would be that much effort to allow a = 128 bit SID size to be compatible.
>>>
>>> I don't understand the rationale for needing a MSV to be e= xplictly configured throughout the domain. Couldn't the appropriate SID= size be chosen by the sender at run time. For instance, if all the SIDs in= a list are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs= are used (I assume 16 and 32 bit SIDs are in same number space).
>>> Since CRH has the bits stating the SID length there is no ambi= guity at the receiver. SID compression is opportunistic and it's always= good practice to avoid situations that require wide scale renumbering.
>>>
>>> Please add a section on mutability requirements of protocol fi= elds so that there is no ambiguity.
>>>
>>> Tom
>>
>> ------------------------------------------------------------------= --
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>> IE9-axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUi= RWm9da3g4
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bits=128/128); Tue, 09 Jul 2019 14:03:00 -0700 (PDT) Date: Tue, 9 Jul 2019 14:02:53 -0700 From: Jeff Tantsura To: spring , Linda Dunbar , SPRING WG , "=?utf-8?Q?=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)?=" Message-ID: <53f3a00b-2dc1-4762-99c3-de7f57b592d2@Spark> In-Reply-To: References: X-Readdle-Message-ID: 53f3a00b-2dc1-4762-99c3-de7f57b592d2@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d250103_759f82cd_c7f7" Archived-At: Subject: Re: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Jul 2019 21:03:11 -0000 --5d250103_759f82cd_c7f7 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline +1 take a look at=C2=A0draft-ietf-mpls-sr-over-ip Cheers, Jeff On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85= =88) , wrote: > Hi Linda, > > Why not directly use the MPLSoUDP encapsulation to carry the B-SID labe= l=C2=A0so as to indicate the preferred path=3F =46or more details, please= read=C2=A0https://tools.ietf.org/html/draft-dukes-spring-sr-for-sdwan-02= =23section-7.3 > > Best regards, > Xiaohu > > > ------------------------------------------------------------------ > > =46rom:Linda Dunbar > > Send Time:2019=E5=B9=B47=E6=9C=889=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=8C= ) 06:26 > > To:Linda Dunbar ; SPRING WG > > Subject:Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-o= ver-hybrid-networks: is it appropriate for not-directly connect SDWAN edg= es to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > Sorry, I meant to ask: > > > > When the SDWAN edge nodes are NOT directly connected to the PEs of SR= domain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header b= its to indicate the desired SR Path=3F > > > > Linda > > > > =46rom: spring On Behalf Of Linda Dunbar > > Sent: Monday, July 08, 2019 5:11 PM > > To: SPRING WG > > Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-over= -hybrid-networks: is it appropriate for not-directly connect SDWAN edges = to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > SD-WAN, as described by ONUG (Open Network User Group), is about pool= ing WAN bandwidth from multiple service providers to get better WAN bandw= idth management, visibility & control. > > Because of the ephemeral property of the selected Cloud DCs, an enter= prise or its network service provider may not have the direct links to th= e Cloud DCs that are optimal for hosting the enterprise=E2=80=99s specifi= c workloads/Apps. Under those circumstances, SD-WAN is a very flexible ch= oice to interconnect the enterprise on-premises data centers & branch off= ices to its desired Cloud DCs... > > However, SD-WAN paths over public internet can have unpredictable per= formance, especially over long distances and cross state/country boundari= es. Therefore, it is highly desirable to place as much as possible the po= rtion of SD-WAN paths over service provider VPN (e.g. enterprise=E2=80=99= s existing VPN) that have guaranteed SLA and to minimize the distance/seg= ments over public internet. > > > > https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-hybrid-ne= tworks/ describes a method to enforce a SD-WAN path=E2=80=99s head-end se= lected route traversing through a list of specific nodes of multiple netw= ork segments without requiring the nodes in each network segments to have= the intelligence (or maintaining states) of selecting next hop or next s= egments. > > > > When a SR domain has multiple PEs with ports facing the external netw= orks (such as the public internet or LTE termination), SD-WAN paths can t= raverse the SR domain via different ingress/egress PEs resulting in diffe= rent E2E performance. > > > > Even with the same ingress/egress, some flows may need different segm= ents across the SR Domain. It is not practical, or even possible, for PEs= to determine which Apps=E2=80=99 flows should egress. > > Segment Routing can be used to steer packets (or path) to traverse th= e explicit egress node, or explicit segments through the SR Domain based = on the SLA requested by the SD-WAN head-end nodes. > > > > When the SDWAN edge nodes are directly connected to the PEs of SR dom= ain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header bits = to indicate the desired SR Path=3F > > > > We are looking for feedback, criticisms, or suggestion on the the pro= posed approach. > > > > Thank you, > > Linda > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > spring mailing list > spring=40ietf.org > https://www.ietf.org/mailman/listinfo/spring --5d250103_759f82cd_c7f7 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
+1

take a look at&=23160;draft-ietf-mpls-sr-over-ip

Cheers,
Jeff
On Jul 8, 2019, 11:45 PM -0700, =E5= =BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh=40alibaba-inc= .com>, wrote:
Hi Linda,

Why not directly use the MPLSoUDP encapsul= ation to carry the B-SID label&=23160;so as to indicate the preferred pat= h=3F =46or more details, please read&=23160;https://tools.ietf.org/html/draft-dukes-spring-sr-fo= r-sdwan-02=23section-7.3&=23160;

Best regards,
Xiaohu

------------------------------------------= ------------------------
=46rom:Linda Dunbar <linda.dunbar=40fut= urewei.com>
Send Time:2019=E5=B9=B47=E6=9C=889=E6=97=A5= (=E6=98=9F=E6=9C=9F=E4=BA=8C) 06:26
To:Linda Dunbar <linda.dunbar=40futurew= ei.com>; SPRING WG <spring=40ietf.org>
Subject:Re: =5Bspring=5D Seeking comments = for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not= -directly connect SDWAN edges to use GRE/VxLAN header bits to indicate th= e desired SR path=3F

Sorry, I meant to ask:

&=23160;

When the SDWAN edge nodes are NOT directly connected to the PEs of SR domai= n, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header bits to= indicate the desired SR Path=3F

&=23160;

Linda

&=23160;

=46rom: spring <spring-bounces=40iet= f.org> On Behalf Of Linda Dunbar
Sent: Monday, July 08, 2019 5:11 PM
To: SPRING WG <spring=40ietf.org>
Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-o= ver-hybrid-networks: is it appropriate for not-directly connect SDWAN edg= es to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

SD-WAN, as described by ONUG (Open Network Use= r Group), is about pooling WAN bandwidth from multiple service providers = to get better WAN bandwidth management, visibility & control.

Because of the ephemeral property of the selec= ted Cloud DCs, an enterprise or its network service provider may not have= the direct links to the Cloud DCs that are optimal for hosting the enter= prise=E2=80=99s specific workloads/Apps. Under those circumstances, SD-WA= N is a very flexible choice to interconnect the enterprise on-premises da= ta centers & branch offices to its desired Cloud DCs...

However, SD-WAN paths over public internet can= have unpredictable performance, especially over long distances and cross= state/country boundaries. Therefore, it is highly desirable to place as = much as possible the portion of SD-WAN paths over service provider VPN (e= .g. enterprise=E2=80=99s existing VPN) that have guaranteed SLA and to mi= nimize the distance/segments over public internet.

&=23160;

https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-h= ybrid-networks/ describes a method to enforce a SD-WAN path=E2=80=99s= head-end selected route traversing through a list of specific nodes of m= ultiple network segments without requiring the nodes in each network segm= ents to have the intelligence (or maintaining states) of selecting next h= op or next segments.

&=23160;

When a SR domain has multiple PEs= with ports facing the external networks (such as the public internet or = LTE termination), SD-WAN paths can traverse the SR domain via different i= ngress/egress PEs resulting in different E2E performance.

&=23160;

Even with the same ingress/egress, some = flows may need different segments across the SR Domain. It is not practic= al, or even possible, for PEs to determine which Apps=E2=80=99 flows shou= ld egress.

Segment Routing can be used to steer pac= kets (or path) to traverse the explicit egress node, or explicit segments= through the SR Domain based on the SLA requested by the SD-WAN head-end = nodes.

&=23160;

When the SDWAN edge nodes are directly c= onnected to the PEs of SR domain, is it appropriate for SDWAN edge nodes = to use GRE/VxLAN header bits to indicate the desired SR Path=3F

&=23160;

We are looking for feedback, criticisms,= or suggestion on the the proposed approach.

&=23160;

Thank you,

Linda &=23160;

=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
spring mailing list
spring=40ietf.org
https://www.ietf.org/mailman/listinfo/spring
--5d250103_759f82cd_c7f7-- From nobody Tue Jul 9 19:27:12 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 83EA612008A; Tue, 9 Jul 2019 19:27:10 -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 hSHiD2LkjFVj; Tue, 9 Jul 2019 19:27:07 -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 BF889120048; Tue, 9 Jul 2019 19:27:07 -0700 (PDT) Received: from lhreml706-cah.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id F31DA1FAE2B3B0616476; 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Wed, 10 Jul 2019 03:34:18 +0100 Received: from DGGEML512-MBX.china.huawei.com ([169.254.2.81]) by DGGEML402-HUB.china.huawei.com ([fe80::fca6:7568:4ee3:c776%31]) with mapi id 14.03.0439.000; Wed, 10 Jul 2019 10:34:13 +0800 From: "Pengshuping (Peng Shuping)" To: SPRING WG List Thread-Topic: New Version Notification for draft-xie-spring-srv6-network-migration-00.txt Thread-Index: AQHVNXDxWmCuZwzVSEKUvni0mCMcpKbDJBHQ Date: Wed, 10 Jul 2019 02:34:12 +0000 Message-ID: <4278D47A901B3041A737953BAA078ADE14843C68@dggeml512-mbx.china.huawei.com> References: <156257871517.777.5817727879454343475.idtracker@ietfa.amsl.com> In-Reply-To: <156257871517.777.5817727879454343475.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: [10.130.169.124] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] New Version Notification for draft-xie-spring-srv6-network-migration-00.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 02:34:23 -0000 RGVhciBhbGwsIA0KDQpXZSBoYXZlIHN1Ym1pdHRlZCB0aGUgZm9sbG93aW5nIGRyYWZ0IG9uIFNS djYgbmV0d29yayBtaWdyYXRpb24sIHdoaWNoIHdlIGJlbGlldmUgdGhhdCBpdCBpcyBvbmUgb2Yg dGhlIG1vc3QgaW50ZXJlc3RlZCB0b3BpY3MgZm9yIHBlb3BsZS4gWW91ciByZXZpZXcgYW5kIGNv bW1lbnRzIGFyZSB2ZXJ5IHdlbGNvbWVkLiBUaGFuayB5b3UhDQoNCmh0dHBzOi8vZGF0YXRyYWNr ZXIuaWV0Zi5vcmcvZG9jL2RyYWZ0LXhpZS1zcHJpbmctc3J2Ni1uZXR3b3JrLW1pZ3JhdGlvbi8N Cg0KS2luZCBSZWdhcmRzLCANClNodXBpbmcgDQoNCg0KLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0t LS0NCkZyb206IGludGVybmV0LWRyYWZ0c0BpZXRmLm9yZyBbbWFpbHRvOmludGVybmV0LWRyYWZ0 c0BpZXRmLm9yZ10gDQpTZW50OiBNb25kYXksIEp1bHkgMDgsIDIwMTkgNTozOSBQTQ0KU3ViamVj dDogTmV3IFZlcnNpb24gTm90aWZpY2F0aW9uIGZvciBkcmFmdC14aWUtc3ByaW5nLXNydjYtbmV0 d29yay1taWdyYXRpb24tMDAudHh0DQoNCkEgbmV3IHZlcnNpb24gb2YgSS1ELCBkcmFmdC14aWUt c3ByaW5nLXNydjYtbmV0d29yay1taWdyYXRpb24tMDAudHh0DQpoYXMgYmVlbiBzdWNjZXNzZnVs bHkgc3VibWl0dGVkIGJ5IFNodXBpbmcgUGVuZyBhbmQgcG9zdGVkIHRvIHRoZSBJRVRGIHJlcG9z aXRvcnkuDQoNCk5hbWU6CQlkcmFmdC14aWUtc3ByaW5nLXNydjYtbmV0d29yay1taWdyYXRpb24N ClJldmlzaW9uOgkwMA0KVGl0bGU6CQlTUnY2IE5ldHdvcmsgTWlncmF0aW9uDQpEb2N1bWVudCBk YXRlOgkyMDE5LTA3LTA4DQpHcm91cDoJCUluZGl2aWR1YWwgU3VibWlzc2lvbg0KUGFnZXM6CQkx MA0KDQpBYnN0cmFjdDoNCiAgIFNSdjYgaGFzIHNpZ25pZmljYW50IGFkdmFudGFnZXMgb3ZlciBT Ui1NUExTIHdoaWNoIGhhcyBhdHRyYWN0ZWQgbW9yZQ0KICAgYW5kIG1vcmUgYXR0ZW50aW9ucyBh bmQgaW50ZXJlc3RzIGZyb20gb3BlcmF0b3JzIGFuZCB2ZXJ0aWNhbHMuICBUaGUNCiAgIHNtb290 aCBuZXR3b3JrIG1pZ3JhdGlvbiB0b3dhcmRzIFNSdjYgaXMgYSBrZXkgZm9jYWwgcG9pbnQgZm9y IHRoZQ0KICAgU1J2NiBkZXBsb3llcnMuICBUaGlzIGRvY3VtZW50IHByb3ZpZGVzIG5ldHdvcmsg bWlncmF0aW9uIGd1aWRhbmNlDQogICBhbmQgcmVjb21tZW5kYXRpb25zIG9uIHNvbHV0aW9ucyBp biB2YXJpb3VzIHNjZW5hcmlvcy4NCg== From nobody Tue Jul 9 19:36:11 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0D03112008A for ; Tue, 9 Jul 2019 19:36:09 -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 cbnzt-PUTWsO for ; Tue, 9 Jul 2019 19:36:07 -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 17C79120048 for ; Tue, 9 Jul 2019 19:36:07 -0700 (PDT) Received: from LHREML713-CAH.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 4027182EF4D7929B40F8 for ; Wed, 10 Jul 2019 03:36:05 +0100 (IST) Received: from DGGEML421-HUB.china.huawei.com (10.1.199.38) by LHREML713-CAH.china.huawei.com (10.201.108.36) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 10 Jul 2019 03:36:04 +0100 Received: from DGGEML512-MBX.china.huawei.com ([169.254.2.81]) by dggeml421-hub.china.huawei.com ([10.1.199.38]) with mapi id 14.03.0439.000; Wed, 10 Jul 2019 10:36:01 +0800 From: "Pengshuping (Peng Shuping)" To: SPRING WG List Thread-Topic: New Version Notification for draft-peng-spring-srv6-compatibility-01.txt Thread-Index: AQHVNXT2Mrjk2wadA0msaJPXODqdm6bDJAGA Date: Wed, 10 Jul 2019 02:36:01 +0000 Message-ID: <4278D47A901B3041A737953BAA078ADE14843C7F@dggeml512-mbx.china.huawei.com> References: <156258044787.734.12260893996111268597.idtracker@ietfa.amsl.com> In-Reply-To: <156258044787.734.12260893996111268597.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: [10.130.169.124] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] New Version Notification for draft-peng-spring-srv6-compatibility-01.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 02:36:09 -0000 RGVhciBhbGwsIA0KDQpXZSBoYXZlIHN1Ym1pdHRlZCB0aGUgZm9sbG93aW5nIGRyYWZ0IHdoaWNo IGlzIHJlbGF0ZWQgdG8gdGhlIFNSdjYgbmV0d29yayBtaWdyYXRpb24uIFlvdXIgcmV2aWV3IGFu ZCBjb21tZW50cyBhcmUgdmVyeSB3ZWxjb21lZC4gVGhhbmsgeW91IQ0KDQpodHRwczovL2RhdGF0 cmFja2VyLmlldGYub3JnL2RvYy9kcmFmdC1wZW5nLXNwcmluZy1zcnY2LWNvbXBhdGliaWxpdHkv DQoNCktpbmQgUmVnYXJkcywgDQpTaHVwaW5nDQoNCg0KLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0t LS0NCkZyb206IGludGVybmV0LWRyYWZ0c0BpZXRmLm9yZyBbbWFpbHRvOmludGVybmV0LWRyYWZ0 c0BpZXRmLm9yZ10gDQpTZW50OiBNb25kYXksIEp1bHkgMDgsIDIwMTkgNjowNyBQTQ0KU3ViamVj dDogTmV3IFZlcnNpb24gTm90aWZpY2F0aW9uIGZvciBkcmFmdC1wZW5nLXNwcmluZy1zcnY2LWNv bXBhdGliaWxpdHktMDEudHh0DQoNCg0KQSBuZXcgdmVyc2lvbiBvZiBJLUQsIGRyYWZ0LXBlbmct c3ByaW5nLXNydjYtY29tcGF0aWJpbGl0eS0wMS50eHQNCmhhcyBiZWVuIHN1Y2Nlc3NmdWxseSBz dWJtaXR0ZWQgYnkgU2h1cGluZyBQZW5nIGFuZCBwb3N0ZWQgdG8gdGhlIElFVEYgcmVwb3NpdG9y eS4NCg0KTmFtZToJCWRyYWZ0LXBlbmctc3ByaW5nLXNydjYtY29tcGF0aWJpbGl0eQ0KUmV2aXNp b246CTAxDQpUaXRsZToJCVNSdjYgQ29tcGF0aWJpbGl0eSB3aXRoIExlZ2FjeSBEZXZpY2VzDQpE b2N1bWVudCBkYXRlOgkyMDE5LTA3LTA4DQpHcm91cDoJCUluZGl2aWR1YWwgU3VibWlzc2lvbg0K UGFnZXM6CQkxMA0KDQpBYnN0cmFjdDoNCiAgIFdoZW4gZGVwbG95aW5nIFNSdjYgb24gbGVnYWN5 IGRldmljZXMsIHRoZXJlIGFyZSBzb21lIGNvbXBhdGliaWxpdHkNCiAgIGNoYWxsZW5nZXMgc3Vj aCBhcyB0aGUgc3VwcG9ydCBvZiBTUkggcHJvY2Vzc2luZy4NCg0KICAgVGhpcyBkb2N1bWVudCBp ZGVudGlmaWVzIHNvbWUgb2YgdGhlIG1ham9yIGNoYWxsZW5nZXMsIGFuZCBwcm92aWRlcw0KICAg c29sdXRpb25zIHRoYXQgYXJlIGFibGUgdG8gbWl0aWdhdGUgdGhvc2UgY2hhbGxlbmdlcyBhbmQg c21vb3RoIHRoZQ0KICAgbWlncmF0aW9uIHRvd2FyZHMgU1J2NiBkZXBsb3ltZW50Lg0KDQoNCg== From nobody Tue Jul 9 19:54:47 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CEFF8120131 for ; Tue, 9 Jul 2019 19:54:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vGCGY-N7vATh for ; Tue, 9 Jul 2019 19:54:44 -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 D19B31200E6 for ; Tue, 9 Jul 2019 19:54:43 -0700 (PDT) Received: from LHREML710-CAH.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 67467982135153556DF6 for ; Wed, 10 Jul 2019 03:54:41 +0100 (IST) Received: from lhreml702-chm.china.huawei.com (10.201.108.51) by LHREML710-CAH.china.huawei.com (10.201.108.33) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 10 Jul 2019 03:54:40 +0100 Received: from lhreml702-chm.china.huawei.com (10.201.108.51) by lhreml702-chm.china.huawei.com (10.201.108.51) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Wed, 10 Jul 2019 03:54:40 +0100 Received: from NKGEML412-HUB.china.huawei.com (10.98.56.73) by lhreml702-chm.china.huawei.com (10.201.108.51) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P256) id 15.1.1713.5 via Frontend Transport; Wed, 10 Jul 2019 03:54:40 +0100 Received: from NKGEML514-MBX.china.huawei.com ([fe80::40a8:f0d:c0f3:2ca5]) by nkgeml412-hub.china.huawei.com ([10.98.56.73]) with mapi id 14.03.0415.000; Wed, 10 Jul 2019 10:54:29 +0800 From: Xiejingrong To: "spring@ietf.org" Thread-Topic: Comments on Thread-Index: AdU2yLeIH/gcBcBYRKuUnmoAo9B4eQ== Date: Wed, 10 Jul 2019 02:54:29 +0000 Message-ID: <16253F7987E4F346823E305D08F9115AAB8DC899@nkgeml514-mbx.china.huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.217.214] Content-Type: multipart/alternative; boundary="_000_16253F7987E4F346823E305D08F9115AAB8DC899nkgeml514mbxchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] Comments on X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 02:54:46 -0000 --_000_16253F7987E4F346823E305D08F9115AAB8DC899nkgeml514mbxchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I remember there had been lots of discussions on the list about two points, One is the definition of ENH, the other is the use of Next Header 59. Seems like this rev doesn't accept any of them, but make them clear in text= . They work for me. But one point I am even more confused: The SRv6 Endpoint Behavior numbers are maintained by the working group until the RFC is published. Note to the RFC Editor: Remove this paragraph before publication. Why does this document say to create a new registry, but hold the Behavior = numbers privately ? We need the IANA registry be created and allocation from the registry. Thanks Jingrong --_000_16253F7987E4F346823E305D08F9115AAB8DC899nkgeml514mbxchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

I remember there had been lots = of discussions on the list about two points,

One is the definition of ENH, t= he other is the use of Next Header 59.

Seems like this rev doesn’= ;t accept any of them, but make them clear in text.

They work for me.

 

But one point I am even more co= nfused:

   The SRv6 Endpoint Behavior number= s are maintained by the working

   group until the RFC is published.=   Note to the RFC Editor: Remove

   this paragraph before publication.

 

Why does this document say to c= reate a new registry, but hold the Behavior numbers privately ?<= /span>

We need the IANA registry be cr= eated and allocation from the registry.

 

Thanks

Jingrong

 

 

--_000_16253F7987E4F346823E305D08F9115AAB8DC899nkgeml514mbxchi_-- From nobody Wed Jul 10 02:11:31 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 35C7C1200FA for ; Wed, 10 Jul 2019 02:11:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.698 X-Spam-Level: X-Spam-Status: No, score=-1.698 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=fail (1024-bit key) reason="fail (message has been altered)" header.d=opendkim.org header.b=cYUJj0ZL; dkim=fail (1024-bit key) reason="fail (message has been altered)" header.d=elandsys.com header.b=HpZpJVS3 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 qbMqeAJqe-Kh for ; Wed, 10 Jul 2019 02:11:27 -0700 (PDT) Received: from mx.ipv6.elandsys.com (mx.ipv6.elandsys.com [IPv6:2001:470:f329:1::1]) by ietfa.amsl.com (Postfix) with ESMTP id E343B1200EB for ; Wed, 10 Jul 2019 02:11:26 -0700 (PDT) Received: from DESKTOP-K6V9C2L.elandsys.com ([102.115.188.98]) (authenticated bits=0) by mx.elandsys.com (8.14.5/8.14.5) with ESMTP id x6A9BA6g019168 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 10 Jul 2019 02:11:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=opendkim.org; s=mail2010; t=1562749883; x=1562836283; bh=IknPweF99lrmbMLlLR+yVXqPPhN/mLIka4jc10sNKhQ=; h=Date:To:From:Subject; b=cYUJj0ZLtw8hggd3CLp4EqfAPLLl98d63bhHAMuKIWJfyKi9Pz6rOxnBXtwSMKBDR 5oc/sstl2kTRjSOSVJ09yRNNFaGyUP8h3pqI9OG2ZgwjxmkjgPNKK4YWL6conHmWmF BJlrZWhnVMNd+KXC5EPV8oC1KcqSyTgEEn44Y1RM= DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=elandsys.com; s=mail; t=1562749883; x=1562836283; i=@elandsys.com; bh=IknPweF99lrmbMLlLR+yVXqPPhN/mLIka4jc10sNKhQ=; h=Date:To:From:Subject; b=HpZpJVS31ZNlfBoPOpMLJE7/A786kMqZpjI3wrKGBr3xsDCXavLHs29sm1Fz8k+6r Sh13Wf/rYj+513IUS89Vu1ZQfd+WSYnoYS/279jLurVR34+NymJfhO4B+QDJtwN3c2 j+nMebDqfaOdhohJmw9VV4LPys4BO2YKjtNyuDpg= Message-Id: <6.2.5.6.2.20190710020038.100e4950@elandnews.com> X-Mailer: QUALCOMM Windows Eudora Version 6.2.5.6 Date: Wed, 10 Jul 2019 02:10:27 -0700 To: Andrew Alston , spring@ietf.org From: S Moonesamy Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Archived-At: Subject: [spring] Comment on draft-alston-spring-crh-bgp-signalling-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 09:11:28 -0000 Hi Andrew, I took a quick look at draft-alston-spring-crh-bgp-signalling-00. In Section 3.1, there is the following: "Since SIDs in the context of a compressed routing header can be either 16bit of 32bit, the attribute value MUST be either 2 or 4 and the attribute MUST be ignored if this is not the case." Where does the 2 or 4 come from? Is the draft trying to specify that the compressed routing header is malformed if the attribute value is not 2 or 4? Regards, S. Moonesamy From nobody Wed Jul 10 02:52:32 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3EBE61202B7 for ; Wed, 10 Jul 2019 02:52:27 -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 rmsd_NJAEF2Z for ; Wed, 10 Jul 2019 02:52:24 -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 8990D1202AD for ; Wed, 10 Jul 2019 02:52:23 -0700 (PDT) Received: from LHREML711-CAH.china.huawei.com (unknown [172.18.7.108]) by Forcepoint Email with ESMTP id DF6B2157650020B98009 for ; Wed, 10 Jul 2019 10:52:20 +0100 (IST) Received: from DGGEML401-HUB.china.huawei.com (10.3.17.32) by LHREML711-CAH.china.huawei.com (10.201.108.34) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 10 Jul 2019 10:52:12 +0100 Received: from DGGEML512-MBX.china.huawei.com ([169.254.2.81]) by DGGEML401-HUB.china.huawei.com ([fe80::89ed:853e:30a9:2a79%31]) with mapi id 14.03.0439.000; Wed, 10 Jul 2019 17:49:12 +0800 From: "Liubing (Leo)" To: "spring@ietf.org" Thread-Topic: A SRv6 Data Plane TE/QoS Mechanism Thread-Index: AdU3BKGAYIy6E5DnTsyjKPkCof2Y/w== Date: Wed, 10 Jul 2019 09:49:11 +0000 Message-ID: <8AE0F17B87264D4CAC7DE0AA6C406F45DA480A11@dggeml512-mbx.china.huawei.com> Accept-Language: en-US, zh-CN Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.191.175] Content-Type: multipart/alternative; boundary="_000_8AE0F17B87264D4CAC7DE0AA6C406F45DA480A11dggeml512mbxchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] A SRv6 Data Plane TE/QoS Mechanism X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 09:52:31 -0000 --_000_8AE0F17B87264D4CAC7DE0AA6C406F45DA480A11dggeml512mbxchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dear all, I've uploaded a new draft (as below), which introduces a mechanism to allow= the devices to switch flows among multiple paths between a pairs of Ingres= s/Egress routers. The flow switch is based on real-time measurement of cong= estion situation of the paths. Such mechanism could be used to do load balancing, SLA assurance and reliab= ility etc. For load balancing use case, we've had a commercial router hardw= are based prototype in our lab. Although it is not a Spring specific document, the major targeted scenario = is SRv6 (our prototype is also based on SRv6), so opinions from you people = here in Spring would be very valuable. And if such mechanism is benefit to = SR scenarios, we'd be glad to initiate some work in our WG. Your comments would be appreciated very much! Best regards, Bing *************************************Draft Info****************************= ********* Name: draft-liu-ican Revision: 00 Title: Instant Congestion Assessment Network (iCAN) for= Data Plane Traffic Engineering Document date: 2019-07-08 Group: Individual Submission Pages: 8 URL: https://www.ietf.org/internet-drafts/draft-liu-ican-00.txt Status: https://datatracker.ietf.org/doc/draft-liu-ican/ Htmlized: https://tools.ietf.org/html/draft-liu-ican-00 Htmlized: https://datatracker.ietf.org/doc/html/draft-liu-ican Abstract: iCAN (instant Congestion Assessment Network) is a set of mechanisms running directly on network nodes: o To adjust the flows paths based on real-time measurement of the candidate paths. o The measurement is to reflect the congestion situation of each path, so that the ingress nodes could decide which flows need to be switched from a path to another. This is something that current SDN and TE technologies can hardly achieve: o SDN Controller is slow and far from the data plane, it is neither able to assess the real-time congestion situation of each path, nor able to assure the data plane always go as expected (especially in SRv6 scenarios). However, iCAN can work with SDN perfectly: controller planning multi-path transmission, and iCAN does the flow optimization automatically. o Traditional TE is not able to adjust the flow paths in real-time. --_000_8AE0F17B87264D4CAC7DE0AA6C406F45DA480A11dggeml512mbxchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dear all,

 

I’ve uploaded a new draft (as below), which in= troduces a mechanism to allow the devices to switch flows among multiple pa= ths between a pairs of Ingress/Egress routers. The flow switch is based on = real-time measurement of congestion situation of the paths.

 

Such mechanism could be used to do load balancing, S= LA assurance and reliability etc. For load balancing use case, we’ve = had a commercial router hardware based prototype in our lab.

 

Although it is not a Spring specific document, the m= ajor targeted scenario is SRv6 (our prototype is also based on SRv6), so op= inions from you people here in Spring would be very valuable. And if such m= echanism is benefit to SR scenarios, we’d be glad to initiate some work in our WG.

 

Your comments would be appreciated very much!

 

Best regards,

Bing

 

*************************************Draft Info*****= ********************************

Name:       &n= bsp;          draft-liu-ican

Revision:      &nbs= p;       00

Title:       &= nbsp;           &nbs= p; Instant Congestion Assessment Network (iCAN) for Data Plane Traffic Engi= neering

Document date: 2019-07-08

Group:       &= nbsp;          Individual Subm= ission

Pages:       &= nbsp;          8

URL:       &nb= sp;    https://www.ietf.org/internet-drafts/draft-liu-ican-00.txt

Status:       =   https://datatracker.ietf.org/doc/draft-liu-ican/

Htmlized:       https://tools.ietf.org/html/draft-liu-ican-00

Htmlized:       https://datatracker.ietf.org/doc/html/draft-liu-ican

 

 

Abstract:

   iCAN (instant Congestion Assessment = Network) is a set of mechanisms

   running directly on network nodes:

 

   o  To adjust the flows paths ba= sed on real-time measurement of the

      candidate paths.

 

   o  The measurement is to reflec= t the congestion situation of each

      path, so that the = ingress nodes could decide which flows need to

      be switched from a= path to another.

 

   This is something that current SDN a= nd TE technologies can hardly

   achieve:

 

   o  SDN Controller is slow and f= ar from the data plane, it is neither

      able to assess the= real-time congestion situation of each path,

      nor able to assure= the data plane always go as expected

      (especially in SRv= 6 scenarios).  However, iCAN can work with SDN

      perfectly: control= ler planning multi-path transmission, and iCAN

      does the flow opti= mization automatically.

 

   o  Traditional TE is not able t= o adjust the flow paths in real-time.

 

--_000_8AE0F17B87264D4CAC7DE0AA6C406F45DA480A11dggeml512mbxchi_-- From nobody Wed Jul 10 03:26:41 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 70AAC1200FA for ; Wed, 10 Jul 2019 03:26:39 -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, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AUW_agv-38sH for ; Wed, 10 Jul 2019 03:26:36 -0700 (PDT) Received: from eu-smtp-delivery-182.mimecast.com (eu-smtp-delivery-182.mimecast.com [146.101.78.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 05606120099 for ; Wed, 10 Jul 2019 03:26:35 -0700 (PDT) Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-he1eur04lp2059.outbound.protection.outlook.com [104.47.13.59]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-47-yuO0YGmANtyRIvSqZytd1Q-1; Wed, 10 Jul 2019 11:26:30 +0100 Received: from DBBPR03MB5415.eurprd03.prod.outlook.com (20.179.46.78) by DBBPR03MB5222.eurprd03.prod.outlook.com (10.255.78.213) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2052.19; Wed, 10 Jul 2019 10:26:28 +0000 Received: from DBBPR03MB5415.eurprd03.prod.outlook.com ([fe80::2029:6aba:b96f:8dec]) by DBBPR03MB5415.eurprd03.prod.outlook.com ([fe80::2029:6aba:b96f:8dec%4]) with mapi id 15.20.2052.020; Wed, 10 Jul 2019 10:26:28 +0000 From: Andrew Alston To: S Moonesamy , "spring@ietf.org" Thread-Topic: Comment on draft-alston-spring-crh-bgp-signalling-00 Thread-Index: AQHVNv95XgJ6belB9UuET2ixxWKFDabDozbQ Date: Wed, 10 Jul 2019 10:26:28 +0000 Message-ID: References: <6.2.5.6.2.20190710020038.100e4950@elandnews.com> In-Reply-To: <6.2.5.6.2.20190710020038.100e4950@elandnews.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [197.155.81.57] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: cf8624e1-150b-4282-ddc8-08d7052111c0 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; 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charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [spring] Comment on draft-alston-spring-crh-bgp-signalling-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 10:26:39 -0000 Hi SM, We can clarify this - the 2 and 4 come from the length in octets of a 16 bi= t or 32 bit unsigned integer. Basically when reading the NLRI from the packet - think of it in code terms= : Attribute is set to two - when reading the NLRI: Length is 2 octets - which tells you how large the NLRI is Then you read the X octets to get the SID, following by 16 octets to get th= e v6 address - and repeat until (X+16)*Y =3D Length, as referred to above. = If that attribute isn't there, or is not set to either 2 or 4 - your abili= ty to read the NLRI is impaired. So yes, the update is malformed if you ar= e carrying the SAFI and either missing that attribute or that attribute is = not set to 2 or 4. We'll look at clarifying the wording - thanks for the input. Thanks Andrew -----Original Message----- From: S Moonesamy =20 Sent: Wednesday, 10 July 2019 12:10 To: Andrew Alston ; spring@ietf.org Subject: Comment on draft-alston-spring-crh-bgp-signalling-00 Hi Andrew, I took a quick look at draft-alston-spring-crh-bgp-signalling-00. In Secti= on 3.1, there is the following: "Since SIDs in the context of a compressed routing header can be either 16bit of 32bit, the attribute value MUST be either 2 or 4 and the attribute MUST be ignored if this is not the case." Where does the 2 or 4 come from? Is the draft trying to specify that the c= ompressed routing header is malformed if the attribute value is not 2 or 4? Regards, S. Moonesamy From nobody Wed Jul 10 06:25:02 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 72B631200DE for ; Wed, 10 Jul 2019 06:25:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.499 X-Spam-Level: X-Spam-Status: No, score=-14.499 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=Y+Cohytb; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=X5yv2161 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 oQxW0FN9VR1I for ; Wed, 10 Jul 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X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 213A912062B for ; Wed, 10 Jul 2019 11:15:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.698 X-Spam-Level: X-Spam-Status: No, score=-1.698 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=fail (1024-bit key) reason="fail (message has been altered)" header.d=opendkim.org header.b=G9wjS0F2; dkim=fail (1024-bit key) reason="fail (message has been altered)" header.d=elandsys.com header.b=Kvu51ijr 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 QOB7QYf_GAww for ; Wed, 10 Jul 2019 11:15:22 -0700 (PDT) Received: from mx.ipv6.elandsys.com (mx.ipv6.elandsys.com [IPv6:2001:470:f329:1::1]) by ietfa.amsl.com (Postfix) with ESMTP id 5A3A2120605 for ; Wed, 10 Jul 2019 11:15:21 -0700 (PDT) Received: from DESKTOP-K6V9C2L.elandsys.com ([102.115.188.98]) (authenticated bits=0) by mx.elandsys.com (8.14.5/8.14.5) with ESMTP id x6AIF9A8012287 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 10 Jul 2019 11:15:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=opendkim.org; s=mail2010; t=1562782520; x=1562868920; bh=HqxA3ygIoBGOL9CXeorNYZQujAPCEtI34QaVT/OFJpE=; h=Date:To:From:Subject:In-Reply-To:References; b=G9wjS0F24CKLRBLyk/ojYkby8Bj4eK05sjpyhcEpm4JvFCOcGZHth6gmO6NhHPzeS 0NJW+FUwjfNjVtLT3QogBmLRv1WfkZDYmnn5oUxGOqTxihIImroY1D3/Vi1uJWZ/VA PU8f1BED1jxRVDjByay2mQERePuj46s9hBa8RJ5M= DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=elandsys.com; s=mail; t=1562782520; x=1562868920; i=@elandsys.com; bh=HqxA3ygIoBGOL9CXeorNYZQujAPCEtI34QaVT/OFJpE=; h=Date:To:From:Subject:In-Reply-To:References; b=Kvu51ijrj5XfkruWdufWJ3Hft7+cf1MBgCFnrV6w1VEcSgfZ8zxF7zhUoxAkdwJYp lZ0jx3HFnTCpNrof5ARAVVblkX1/EBUnFhMeJzG5L/TY//TbhLnRsU1ER+cjS8k6sm gkb3G66YL+jmM8/EcEayrhvkzhYd7Vzp8jlLZV0s= Message-Id: <6.2.5.6.2.20190710110205.0ede48e8@elandnews.com> X-Mailer: QUALCOMM Windows Eudora Version 6.2.5.6 Date: Wed, 10 Jul 2019 11:14:59 -0700 To: Andrew Alston , spring@ietf.org From: S Moonesamy In-Reply-To: References: <6.2.5.6.2.20190710020038.100e4950@elandnews.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Archived-At: Subject: Re: [spring] Comment on draft-alston-spring-crh-bgp-signalling-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jul 2019 18:15:24 -0000 Hi Andrew, At 03:26 AM 10-07-2019, Andrew Alston wrote: >We can clarify this - the 2 and 4 come from the length in octets of >a 16 bit or 32 bit unsigned integer. > >Basically when reading the NLRI from the packet - think of it in code terms: Thanks for elaborating on how it would work in terms of code. I read the draft again and I noticed the following in Section 1: "It is envisaged that such signalling will be required to signal, among other things, deep packet inspection systems ..." Will RFC 7258 be considered for this proposed BGP extension given that it is related to deep packet inspection? Regards, S. Moonesamy From nobody Wed Jul 10 23:06:52 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 44147120128; Wed, 10 Jul 2019 23:06:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eqApTObxjb31; Wed, 10 Jul 2019 23:06:48 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6D6F51200F4; Wed, 10 Jul 2019 23:06:48 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id E2A18FE0A8CE9541F3B5; Thu, 11 Jul 2019 07:06:45 +0100 (IST) Received: from NKGEML414-HUB.china.huawei.com (10.98.56.75) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 11 Jul 2019 07:06:45 +0100 Received: from NKGEML515-MBS.china.huawei.com ([169.254.5.134]) by nkgeml414-hub.china.huawei.com ([10.98.56.75]) with mapi id 14.03.0415.000; Thu, 11 Jul 2019 14:05:45 +0800 From: Zhuangshunwan To: "draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org" CC: "spring@ietf.org" Thread-Topic: Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 Thread-Index: AdU3rSdcXioW4GrnQeiM4wmVObwjeQ== Date: Thu, 11 Jul 2019 06:05:45 +0000 Message-ID: <19AB2A007F56DB4E8257F949A2FB9858E5BFB046@NKGEML515-MBS.china.huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.130.202.166] Content-Type: multipart/alternative; boundary="_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB046NKGEML515MBSchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jul 2019 06:06:51 -0000 --_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB046NKGEML515MBSchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi all, Thanks to the authors for introducing this very useful draft. I have read draft-filsfils-spring-srv6-net-pgm-illustration-00 and may have= found some minor questions. #1 2.1. Simplified SID allocation ... Node k has a classic IPv6 loopback address A:k::/128 which is advertised in the IGP [Shunwan] Maybe "A:k::/128" here would be A:k::/32? #2 2.4. SR-L3VPN ... The reader can easily infer all the other SR-IPVPN instantiations: +---------------------------------+----------------------------------+ | Route at ingress PE(1) | SR-VPN Egress SID of egress PE(8)| +---------------------------------+----------------------------------+ | IPv4 tenant route with egress | End.DT4 function bound to | | tenant table lookup | IPv4-tenant-100 table | +---------------------------------+----------------------------------+ | IPv4 tenant route without egress| End.DX4 function bound to | | tenant table lookup | CE-C (IPv4) | +---------------------------------+----------------------------------+ | IPv6 tenant route with egress | End.DT6 function bound to | | tenant table lookup | IPv6-tenant-100 table | +---------------------------------+----------------------------------+ | IPv6 tenant route without egress| End.DX6 function bound to | | tenant table lookup | CE-C (IPv6) | +---------------------------------+----------------------------------+ [Shunwan] May we add an End.DT46 case here? #3 2.7.1. EVPN Bridging ... Nodes 1, 4 and 8 are going to exchange the End.DT2M SIDs via BGP- based EVPN Type-3 route. Upon reception of the EVPN Type-3 routes, each node build its own replication list per L2 table that will be used for ingress BUM traffic replication. The replication lists are the following: [Shunwan]"Nodes 1, 4 and 8"here should be "Nodes 1, 3 and 8 ..." #4 2.7.4. EVPN Integrated Routing Bridging (IRB) ... When node 1 receives a packet P from CE-A destined to 20.20.20.20 from a host (10.10.10.11), P looks up its L2 table T1 MAC-DA lookup to find the associated SID. It pushes an outer IPv6 header with SA=3DA:1::, DA=3DB:8:D2C:: and NH=3D59. Note that no additional header = is pushed. Node 8 then forwards the resulting packet on the shortest path to B:8::/32. EVPN intra-subnet forwarding is then achieved. [Shunwan] Should "from a host (10.10.10.11)" be "from a host (20.20.20.11)= , " here?. Or any other address belongs the same network segment as the destination ad= dress. #5 2.8.2. SR policy at a midpoint ... Let us consider P2 when it is received by node 2 and let us assume that node 2 is configured to steer B:7::/32 in a T.Insert behavior associated with SR policy . In such a case, node 2 would send the following modified packet P2 on the link to 4: [Shunwan] Should "the link to 4" be "the link to 3" here? #6 2.9. End-to-End policy with intermediate BSID ... B:3:C4:: realizes the low-latency path from the ingress PE to the egress PE. This is the underlay optimization part of the intermediate policy. B:9:A1:: and B:6:A2:: represent two SR-aware NFV applications residing in containers respectively connected to node 9 and 6. [Shunwan] Should "B:3:C4:: realizes the low-latency path ..."here be "B:2:B1:: realiz= es the low-latency path ..."? AND we see only 2 reference topologies in page 4 & 9, but cannot find node = 9 within them, maybe need another reference topology here? Again, I think this draft is very useful, it can help us understand and imp= lement SRv6 network programming faster. I think it should be adopted by the WG. Thanks, Shunwan --_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB046NKGEML515MBSchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi all,

Thanks to the au= thors for introducing this very useful draft.

I have read draf= t-filsfils-spring-srv6-net-pgm-illustration-00 and may have found some mino= r questions.

 

#1

2.1.  Simplified SID allocation=

…

  &nbs= p;   Node k has a classic IPv6 loopback address A:k::/128  w= hich is

  &nbs= p;   advertised in the IGP

[S= hunwan] Maybe “A:k::/128” here would be A= :k::/32?

 

#2

2.4.  SR-L3VPN

…

The reader can e= asily infer all the other SR-IPVPN instantiations:

  +----= -----------------------------+----------------------------------+

  | Route a= t ingress PE(1)          | SR-= VPN Egress SID of egress PE(8)|

  +----= -----------------------------+----------------------------------+

  | IPv4 te= nant route with egress   | End.DT4 function bound to  &= nbsp;     |

  | tenant = table lookup          &nb= sp;  | IPv4-tenant-100 table       =      |

  +----= -----------------------------+----------------------------------+

  | IPv4 te= nant route without egress| End.DX4 function bound to    = ;    |

  | tenant = table lookup          &nb= sp;  | CE-C (IPv4)        &nbs= p;             = |

  +----= -----------------------------+----------------------------------+

  | IPv6 te= nant route with egress   | End.DT6 function bound to  &= nbsp;     |

  | tenant = table lookup          &nb= sp;  | IPv6-tenant-100 table       =      |

  +----= -----------------------------+----------------------------------+

  | IPv6 te= nant route without egress| End.DX6 function bound to    = ;    |

  | tenant = table lookup          &nb= sp;  | CE-C (IPv6)        &nbs= p;             = |

  +----= -----------------------------+----------------------------------+

[S= hunwan] May we add an End.DT46 case here?

 

#3

2.7.1.  EVPN Bridging

…

   Nod= es 1, 4 and 8 are going to exchange the End.DT2M SIDs via BGP-

   bas= ed EVPN Type-3 route.  Upon reception of the EVPN Type-3 routes,<= /o:p>

   eac= h node build its own replication list per L2 table that will be<= /span>

   use= d for ingress BUM traffic replication.  The replication lists are=

   the= following:

[S= hunwan]“Nodes 1, 4 and 8”here should be “Nodes 1, 3 and 8 …”

 

#4=

2.7.4.  EVPN Integrated Routing Brid= ging (IRB)

&#= 8230;

   Whe= n node 1 receives a packet P from CE-A destined to 20.20.20.20

   fro= m a host (10.10.10.11), P looks up its L2 table T1 MAC-DA lookup=

   to = find the associated SID.  It pushes an outer IPv6 header with

   SA= =3DA:1::, DA=3DB:8:D2C:: and NH=3D59.  Note that no additional header = is

   pus= hed.  Node 8 then forwards the resulting packet on the shortest

   pat= h to B:8::/32.  EVPN intra-subnet forwarding is then achieved.

[S= hunwan] Should “from a host (10.10.10.11)” be  “from= a host (20.20.20.11), ” here?.

Or= any other address belongs the same network segment as the destination addr= ess.

 

#5

2.8.2.  SR policy at a midpoint=

…

   Let= us consider P2 when it is received by node 2 and let us assume<= /span>

   tha= t node 2 is configured to steer B:7::/32 in a T.Insert behavior<= /span>

   ass= ociated with SR policy <B:3:C4::, B:5:1::>.

 

   In = such a case, node 2 would send the following modified packet P2 on

   the= link to 4:

[S= hunwan] Should “the link to 4” be “the link to 3” h= ere?

 

#6

2.9.  End-to-End policy with interme= diate BSID

…

   B:3= :C4:: realizes the low-latency path from the ingress PE to the

   egr= ess PE.  This is the underlay optimization part of the

   int= ermediate policy.

 

   B:9= :A1:: and B:6:A2:: represent two SR-aware NFV applications

   res= iding in containers respectively connected to node 9 and 6.

[S= hunwan]

Sh= ould “B:3:C4:: realizes the low-latency path …”here be “B:2:B1:: realizes = the low-latency path …”?

AN= D we see only 2 reference topologies in page 4 & 9, but cannot find nod= e 9 within them, maybe need another reference topology here?

 

Again, I think t= his draft is very useful, it can help us understand and implement SRv6 netw= ork programming faster.

I think it shoul= d be adopted by the WG.

 

Thanks,

Shunwan

--_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB046NKGEML515MBSchi_-- From nobody Thu Jul 11 01:06:08 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AE07A1201AA; Thu, 11 Jul 2019 01:06:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.597 X-Spam-Level: X-Spam-Status: No, score=-2.597 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hjaWhg9LtCnO; Thu, 11 Jul 2019 01:06:02 -0700 (PDT) Received: from relais-inet.orange.com (relais-inet.orange.com [80.12.66.39]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0D358120291; Thu, 11 Jul 2019 01:06:02 -0700 (PDT) Received: from opfedar07.francetelecom.fr (unknown [xx.xx.xx.9]) by opfedar20.francetelecom.fr (ESMTP service) with ESMTP id 45kpXS2vX7z8tJL; Thu, 11 Jul 2019 10:06:00 +0200 (CEST) Received: from Exchangemail-eme6.itn.ftgroup (unknown [xx.xx.13.73]) by opfedar07.francetelecom.fr (ESMTP service) with ESMTP id 45kpXS1nVnz5vNP; Thu, 11 Jul 2019 10:06:00 +0200 (CEST) Received: from OPEXCAUBM43.corporate.adroot.infra.ftgroup ([fe80::b846:2467:1591:5d9d]) by OPEXCAUBM23.corporate.adroot.infra.ftgroup ([::1]) with mapi id 14.03.0439.000; Thu, 11 Jul 2019 10:06:00 +0200 From: To: Zhuangshunwan CC: "spring@ietf.org" , "draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org" Thread-Topic: Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 Thread-Index: AdU3rSdcXioW4GrnQeiM4wmVObwjeQAEWTpQ Date: Thu, 11 Jul 2019 08:05:59 +0000 Message-ID: <16156_1562832360_5D26EDE8_16156_498_17_53C29892C857584299CBF5D05346208A48B67ACD@OPEXCAUBM43.corporate.adroot.infra.ftgroup> References: <19AB2A007F56DB4E8257F949A2FB9858E5BFB046@NKGEML515-MBS.china.huawei.com> In-Reply-To: <19AB2A007F56DB4E8257F949A2FB9858E5BFB046@NKGEML515-MBS.china.huawei.com> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.114.13.245] Content-Type: multipart/alternative; boundary="_000_53C29892C857584299CBF5D05346208A48B67ACDOPEXCAUBM43corp_" MIME-Version: 1.0 Archived-At: Subject: Re: [spring] Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jul 2019 08:06:06 -0000 --_000_53C29892C857584299CBF5D05346208A48B67ACDOPEXCAUBM43corp_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Zhuangshunwan, Thank you for reviewing drafts and providing comments. This is the way we i= mprove and progress documents. =D8 Again, I think this draft is very useful, it can help us understand an= d implement SRv6 network programming faster. If the SRv6 network programming draft is not clear/easy to understand enoug= h, please provides comments on the network programming draft in order to im= prove it. Because in the end, in case of misunderstanding leading to intero= p issues, this is the normative text which matters, not illustrations. Thank you, Best regards, Bruno From: Zhuangshunwan [mailto:zhuangshunwan@huawei.com] Sent: Thursday, July 11, 2019 8:06 AM To: draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org Cc: spring@ietf.org Subject: Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 Hi all, Thanks to the authors for introducing this very useful draft. I have read draft-filsfils-spring-srv6-net-pgm-illustration-00 and may have= found some minor questions. #1 2.1. Simplified SID allocation ... Node k has a classic IPv6 loopback address A:k::/128 which is advertised in the IGP [Shunwan] Maybe "A:k::/128" here would be A:k::/32? #2 2.4. SR-L3VPN ... The reader can easily infer all the other SR-IPVPN instantiations: +---------------------------------+----------------------------------+ | Route at ingress PE(1) | SR-VPN Egress SID of egress PE(8)| +---------------------------------+----------------------------------+ | IPv4 tenant route with egress | End.DT4 function bound to | | tenant table lookup | IPv4-tenant-100 table | +---------------------------------+----------------------------------+ | IPv4 tenant route without egress| End.DX4 function bound to | | tenant table lookup | CE-C (IPv4) | +---------------------------------+----------------------------------+ | IPv6 tenant route with egress | End.DT6 function bound to | | tenant table lookup | IPv6-tenant-100 table | +---------------------------------+----------------------------------+ | IPv6 tenant route without egress| End.DX6 function bound to | | tenant table lookup | CE-C (IPv6) | +---------------------------------+----------------------------------+ [Shunwan] May we add an End.DT46 case here? #3 2.7.1. EVPN Bridging ... Nodes 1, 4 and 8 are going to exchange the End.DT2M SIDs via BGP- based EVPN Type-3 route. Upon reception of the EVPN Type-3 routes, each node build its own replication list per L2 table that will be used for ingress BUM traffic replication. The replication lists are the following: [Shunwan]"Nodes 1, 4 and 8"here should be "Nodes 1, 3 and 8 ..." #4 2.7.4. EVPN Integrated Routing Bridging (IRB) ... When node 1 receives a packet P from CE-A destined to 20.20.20.20 from a host (10.10.10.11), P looks up its L2 table T1 MAC-DA lookup to find the associated SID. It pushes an outer IPv6 header with SA=3DA:1::, DA=3DB:8:D2C:: and NH=3D59. Note that no additional header = is pushed. Node 8 then forwards the resulting packet on the shortest path to B:8::/32. EVPN intra-subnet forwarding is then achieved. [Shunwan] Should "from a host (10.10.10.11)" be "from a host (20.20.20.11)= , " here?. Or any other address belongs the same network segment as the destination ad= dress. #5 2.8.2. SR policy at a midpoint ... Let us consider P2 when it is received by node 2 and let us assume that node 2 is configured to steer B:7::/32 in a T.Insert behavior associated with SR policy . In such a case, node 2 would send the following modified packet P2 on the link to 4: [Shunwan] Should "the link to 4" be "the link to 3" here? #6 2.9. End-to-End policy with intermediate BSID ... B:3:C4:: realizes the low-latency path from the ingress PE to the egress PE. This is the underlay optimization part of the intermediate policy. B:9:A1:: and B:6:A2:: represent two SR-aware NFV applications residing in containers respectively connected to node 9 and 6. [Shunwan] Should "B:3:C4:: realizes the low-latency path ..."here be "B:2:B1:: realiz= es the low-latency path ..."? AND we see only 2 reference topologies in page 4 & 9, but cannot find node = 9 within them, maybe need another reference topology here? Again, I think this draft is very useful, it can help us understand and imp= lement SRv6 network programming faster. I think it should be adopted by the WG. Thanks, Shunwan ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou = falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. --_000_53C29892C857584299CBF5D05346208A48B67ACDOPEXCAUBM43corp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Zhuangshunwan,

 

Thank you for reviewing drafts and providing comments. This is the way we improve and progress documents.

 

=D8  Again, I think this draft is very useful, it= can help us understand and implement SRv6 network programming faster.=

If the SRv6 network programming draft is not clear/easy to understand enough, please provides comments on the network programming draft in order= to improve it. Because in the end, in case of misunderstanding leading to = interop issues, this is the normative text which matters, not illustrations.  

 

Thank you,

Best regards,

Bruno

From: Zhuangshunwan [mailto:zhuangshunwan@huawei.com]
Sent: Thursday, July 11, 2019 8:06 AM
To: draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org
Cc: spring@ietf.org
Subject: Comments on draft-filsfils-spring-srv6-net-pgm-illustration= -00

 

Hi all,

Thanks to the authors f= or introducing this very useful draft.

I have read draft-filsf= ils-spring-srv6-net-pgm-illustration-00 and may have found some minor quest= ions.

 

#1

2.1.  Simplified SID allocation

…

      Node k has a classic IPv6 loopback address A:k::/128  which is

      advertised in the IGP

[Shunwan] Maybe “A:k::/128” here would be A:= k::/32?

 

#2

2.4.  SR-L3VPN

…

The reader can easily i= nfer all the other SR-IPVPN instantiations:

  +---------------------------------+= ;----------------------------------+

  | Route at ingress PE(1)   &n= bsp;      | SR-VPN Egress SID of egress PE(= 8)|

  +---------------------------------+= ;----------------------------------+

  | IPv4 tenant route with egress   | End.DT4 function bound to        |

  | tenant table lookup        = ;     | IPv4-tenant-100 table&n= bsp;           |

  +---------------------------------+= ;----------------------------------+

  | IPv4 tenant route without egress| End.DX4 function bound to        |

  | tenant table lookup        = ;     | CE-C (IPv4)  =             &nb= sp;       |

  +---------------------------------+= ;----------------------------------+

  | IPv6 tenant route with egress   | End.DT6 function bound to        |

  | tenant table lookup        = ;     | IPv6-tenant-100 table&n= bsp;           |

  +---------------------------------+= ;----------------------------------+

  | IPv6 tenant route without egress| End.DX6 function bound to        |

  | tenant table lookup        = ;     | CE-C (IPv6)  =             &nb= sp;       |

  +---------------------------------+= ;----------------------------------+

[Shunwan]= May we add an End.DT46 case here?

 

#3

2.7.1.  EVPN Bridging

…

   Nodes 1, 4 and 8 are going to exchange the End.DT2M SIDs via BGP-

   based EVPN Type-3 route.  Upon = reception of the EVPN Type-3 routes,

   each node build its own replication list per L2 table that will be

   used for ingress BUM traffic replication.&= nbsp; The replication lists are

   the following:

[Shunwan]= “Nodes 1, 4 and 8”here should be “Nodes 1, 3 and 8 …”

&nbs= p;

#4

2.7.4.  EVPN Integrated Routing Bridging (IRB)

…

   When node 1 receives a packet P from CE-A destined to 20.20.20.20

   from a host (10.10.10.11), P looks up its L2 table T1 MAC-DA lookup

   to find the associated SID.  It push= es an outer IPv6 header with

   SA=3DA:1::, DA=3DB:8:D2C:: and NH=3D59. = = Note that no additional header is

   pushed.  Node 8 then forwards the resulting packet on the shortest

   path to B:8::/32.  EVPN intra-subnet forwarding is then achieved.

[Shunwan]= Should “from a host (10.10.10.11)” be  = ;“from a host (20.20.20.11), ” here?.

Or any ot= her address belongs the same network segment as the destination address.

 

#5

2.8.2.  SR policy at a midpoint

…

   Let us consider P2 when it is received by node 2 and let us assume

   that node 2 is configured to steer B:7::/32 in a T.Insert behavior

   associated with SR policy <B:3:C4::, B:5:1::>.

 

   In such a case, node 2 would send the following modified packet P2 on

   the link to 4:

[Shunwan]= Should “the link to 4” be “the link to 3” here?

 

#6

2.9.  End-to-End policy with intermediate BSID

…

   B:3:C4:: realizes the low-latency path from the ingress PE to the

   egress PE.  This is the underlay optimization part of the

   intermediate policy.

 

   B:9:A1:: and B:6:A2:: represent two SR-aware NFV applications

   residing in containers respectively connected to node 9 and 6.

[Shunwan]

Should “B:3:C4:: realizes the low-latency path …”= here be “B:2:B1:: realizes the low-latency path <= /span>…”?

AND we se= e only 2 reference topologies in page 4 & 9, but cannot find node 9 wit= hin them, maybe need another reference topology here?

 

Again, I think this dra= ft is very useful, it can help us understand and implement SRv6 network pro= gramming faster.

I think it should be ad= opted by the WG.

 

Thanks,

Shunwan

______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
--_000_53C29892C857584299CBF5D05346208A48B67ACDOPEXCAUBM43corp_-- From nobody Thu Jul 11 02:17:04 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A81DA1202B9; Thu, 11 Jul 2019 02:17:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zvBM3YmYh7yc; Thu, 11 Jul 2019 02:17:00 -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 59C94120222; Thu, 11 Jul 2019 02:17:00 -0700 (PDT) Received: from lhreml707-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id C5E12EC77C9DFE276A3E; Thu, 11 Jul 2019 10:16:57 +0100 (IST) Received: from NKGEML412-HUB.china.huawei.com (10.98.56.73) by lhreml707-cah.china.huawei.com (10.201.108.48) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 11 Jul 2019 10:16:56 +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; Thu, 11 Jul 2019 17:16:50 +0800 From: Zhuangshunwan To: "draft-ietf-spring-srv6-network-programming@ietf.org" CC: "spring@ietf.org" Thread-Topic: Comments on draft-ietf-spring-srv6-network-programming-01 Thread-Index: AdU3xVHuiYvAOmOkShGrHwiue53NMQ== Date: Thu, 11 Jul 2019 09:16:50 +0000 Message-ID: <19AB2A007F56DB4E8257F949A2FB9858E5BFB5F4@NKGEML515-MBS.china.huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.130.202.166] Content-Type: multipart/alternative; boundary="_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB5F4NKGEML515MBSchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] Comments on draft-ietf-spring-srv6-network-programming-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jul 2019 09:17:03 -0000 --_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB5F4NKGEML515MBSchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi all, I have read this document again and again, and think it is a good guide to = implantation. Thanks to the authors for introducing this very useful draft. Few comments: #1 2. Terminology ... The effective next-header (ENH) is the next-header field of the IP header when no SRH is present, or is the next-header field of the last SRH. [Shunwan] It's better to change "the next-header field of the IP header ...= " to "the next-header field of the IPv6 header ..." . #2 4.7. End.DT2M: Decapsulation and L2 table flooding The "Endpoint with decapsulation and specific L2 table flooding" function (End.DT2M for short) is a variant of the endpoint function. This function may take an argument: "Arg.FE2". It is an argument specific to EVPN ESI filtering. It is used to exclude a specific OIF (or set of OIFs) from L2 table T flooding. [Shunwan] This section says: "It is an argument specific to EVPN ESI filtering. " Question: Can it also be an argument specific to EVPN E-Tree [RFC8317] Leaf= filtering? If I understand it correctly , the specifications defined in this section c= an also be easily applied to EVPN E-Tree Leaf filtering. Thanks, Shunwan --_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB5F4NKGEML515MBSchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi all,

 

I have read this document again and again, and think= it is a good guide to implantation.

Thanks to the authors for introducing this very usef= ul draft.

 

Few comments:

 

#1

2.  Terminology

…

   The effective next-header (ENH) is the = next-header field of the IP

   header when no SRH is present, or is th= e next-header field of the

   last SRH.

 

[Shunwan] It’s b= etter to change “the next-header field of the IP header … ̶= 1; to “the next-header field of the IPv6  header …” = .

 

#2

4.7.  End.DT2M: Decapsulation and L2 table floo= ding

 

   The "Endpoint with decapsulation a= nd specific L2 table flooding"

   function (End.DT2M for short) is a vari= ant of the endpoint function.

 

   This function may take an argument: &qu= ot;Arg.FE2".  It is an argument

   specific to EVPN ESI filtering.  I= t is used to exclude a specific OIF

   (or set of OIFs) from L2 table T floodi= ng.

 

[Shunwan] <= /span>

This section says: = 220;It is an argument specific to EVPN ESI filtering.  ”

Question: Can it also = be an argument specific to EVPN E-Tree [RFC8317] Leaf filtering?

If I understand it cor= rectly , the specifications defined in this section can also be easily appl= ied to EVPN E-Tree Leaf filtering.

 

Thanks,

Shunwan

--_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB5F4NKGEML515MBSchi_-- From nobody Thu Jul 11 02:30:29 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0FD4D12019F; Thu, 11 Jul 2019 02:30:27 -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 0vWGxKuRUZ5Q; Thu, 11 Jul 2019 02:30:24 -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 AD9CE1200D6; Thu, 11 Jul 2019 02:30:23 -0700 (PDT) Received: from lhreml706-cah.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id 285B04AF330325EBFA4F; Thu, 11 Jul 2019 10:30:21 +0100 (IST) Received: from NKGEML411-HUB.china.huawei.com (10.98.56.70) by lhreml706-cah.china.huawei.com (10.201.108.47) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 11 Jul 2019 10:30:19 +0100 Received: from NKGEML515-MBS.china.huawei.com ([169.254.5.134]) by nkgeml411-hub.china.huawei.com ([10.98.56.70]) with mapi id 14.03.0415.000; Thu, 11 Jul 2019 17:30:11 +0800 From: Zhuangshunwan To: "bruno.decraene@orange.com" CC: "spring@ietf.org" , "draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org" Thread-Topic: Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 Thread-Index: AQHVN79/yQBg+RQo/0ODmfJft23zSqbFJOhw Date: Thu, 11 Jul 2019 09:30:10 +0000 Message-ID: <19AB2A007F56DB4E8257F949A2FB9858E5BFB62D@NKGEML515-MBS.china.huawei.com> References: <19AB2A007F56DB4E8257F949A2FB9858E5BFB046@NKGEML515-MBS.china.huawei.com> <16156_1562832360_5D26EDE8_16156_498_17_53C29892C857584299CBF5D05346208A48B67ACD@OPEXCAUBM43.corporate.adroot.infra.ftgroup> In-Reply-To: <16156_1562832360_5D26EDE8_16156_498_17_53C29892C857584299CBF5D05346208A48B67ACD@OPEXCAUBM43.corporate.adroot.infra.ftgroup> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.130.202.166] Content-Type: multipart/alternative; boundary="_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB62DNKGEML515MBSchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [spring] Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jul 2019 09:30:27 -0000 --_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB62DNKGEML515MBSchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable From: bruno.decraene@orange.com [mailto:bruno.decraene@orange.com] Sent: Thursday, July 11, 2019 4:06 PM To: Zhuangshunwan Cc: spring@ietf.org; draft-filsfils-spring-srv6-net-pgm-illustration@ietf.o= rg Subject: RE: Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 Hi Zhuangshunwan, Thank you for reviewing drafts and providing comments. This is the way we i= mprove and progress documents. ? Again, I think this draft is very useful, it can help us understand and = implement SRv6 network programming faster. If the SRv6 network programming draft is not clear/easy to understand enoug= h, please provides comments on the network programming draft in order to im= prove it. Because in the end, in case of misunderstanding leading to intero= p issues, this is the normative text which matters, not illustrations. [Shunwan] Ok, I will continue to read the specifications of SRv6 NP, and d= o my best to help improve it. Thank you, Best regards, Bruno From: Zhuangshunwan [mailto:zhuangshunwan@huawei.com] Sent: Thursday, July 11, 2019 8:06 AM To: draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org Cc: spring@ietf.org Subject: Comments on draft-filsfils-spring-srv6-net-pgm-illustration-00 Hi all, Thanks to the authors for introducing this very useful draft. I have read draft-filsfils-spring-srv6-net-pgm-illustration-00 and may have= found some minor questions. #1 2.1. Simplified SID allocation ... Node k has a classic IPv6 loopback address A:k::/128 which is advertised in the IGP [Shunwan] Maybe "A:k::/128" here would be A:k::/32? #2 2.4. SR-L3VPN ... The reader can easily infer all the other SR-IPVPN instantiations: +---------------------------------+----------------------------------+ | Route at ingress PE(1) | SR-VPN Egress SID of egress PE(8)| +---------------------------------+----------------------------------+ | IPv4 tenant route with egress | End.DT4 function bound to | | tenant table lookup | IPv4-tenant-100 table | +---------------------------------+----------------------------------+ | IPv4 tenant route without egress| End.DX4 function bound to | | tenant table lookup | CE-C (IPv4) | +---------------------------------+----------------------------------+ | IPv6 tenant route with egress | End.DT6 function bound to | | tenant table lookup | IPv6-tenant-100 table | +---------------------------------+----------------------------------+ | IPv6 tenant route without egress| End.DX6 function bound to | | tenant table lookup | CE-C (IPv6) | +---------------------------------+----------------------------------+ [Shunwan] May we add an End.DT46 case here? #3 2.7.1. EVPN Bridging ... Nodes 1, 4 and 8 are going to exchange the End.DT2M SIDs via BGP- based EVPN Type-3 route. Upon reception of the EVPN Type-3 routes, each node build its own replication list per L2 table that will be used for ingress BUM traffic replication. The replication lists are the following: [Shunwan]"Nodes 1, 4 and 8"here should be "Nodes 1, 3 and 8 ..." #4 2.7.4. EVPN Integrated Routing Bridging (IRB) ... When node 1 receives a packet P from CE-A destined to 20.20.20.20 from a host (10.10.10.11), P looks up its L2 table T1 MAC-DA lookup to find the associated SID. It pushes an outer IPv6 header with SA=3DA:1::, DA=3DB:8:D2C:: and NH=3D59. Note that no additional header = is pushed. Node 8 then forwards the resulting packet on the shortest path to B:8::/32. EVPN intra-subnet forwarding is then achieved. [Shunwan] Should "from a host (10.10.10.11)" be "from a host (20.20.20.11)= , " here?. Or any other address belongs the same network segment as the destination ad= dress. #5 2.8.2. SR policy at a midpoint ... Let us consider P2 when it is received by node 2 and let us assume that node 2 is configured to steer B:7::/32 in a T.Insert behavior associated with SR policy . In such a case, node 2 would send the following modified packet P2 on the link to 4: [Shunwan] Should "the link to 4" be "the link to 3" here? #6 2.9. End-to-End policy with intermediate BSID ... B:3:C4:: realizes the low-latency path from the ingress PE to the egress PE. This is the underlay optimization part of the intermediate policy. B:9:A1:: and B:6:A2:: represent two SR-aware NFV applications residing in containers respectively connected to node 9 and 6. [Shunwan] Should "B:3:C4:: realizes the low-latency path ..."here be "B:2:B1:: realiz= es the low-latency path ..."? AND we see only 2 reference topologies in page 4 & 9, but cannot find node = 9 within them, maybe need another reference topology here? Again, I think this draft is very useful, it can help us understand and imp= lement SRv6 network programming faster. I think it should be adopted by the WG. Thanks, Shunwan ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou = falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. --_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB62DNKGEML515MBSchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

 

From: bruno.decraene@orange.com [mailto:bruno.decraene@oran= ge.com]
Sent: Thursday, July 11, 2019 4:06 PM
To: Zhuangshunwan <zhuangshunwan@huawei.com>
Cc: spring@ietf.org; draft-filsfils-spring-srv6-net-pgm-illustration= @ietf.org
Subject: RE: Comments on draft-filsfils-spring-srv6-net-pgm-illustra= tion-00

 

Hi Zhuan= gshunwan,

&nb= sp;

Thank you for review= ing drafts and providing comments. This is the way we improve and progress = documents.

 

Ø  Again, I= think this draft is very useful, it can help us understand and implement S= Rv6 network programming faster.

If the SRv6 network = programming draft is not clear/easy to understand enough, please provides c= omments on the network programming draft in order to improve it. Because in the end, in case of misunderstanding leading to = interop issues, this is the normative text which matters, not illustrations= . 

 

[Shunwan]  Ok, = I will continue to read the specifications of SRv6 NP, and do my best to he= lp improve it.

 

Thank you,

Best regards,

Bruno

From: Zhuangshunwan [mailto:zhuangshunwan@huawei.com]
Sent: Thursday, July 11, 2019 8:06 AM
To: draft-filsfils-spring-srv6-net-pgm-illustration@ietf.org
Cc: spring@ietf.org
Subject: Comments on draft-filsfils-spring-srv6-net-pgm-illustration= -00

=  

Hi all,

Thanks to the authors for introducing this very useful draft.<= o:p>

I have read draft-filsfils-spring-srv6-net-pgm-illustration-00= and may have found some minor questions.

 

#1

2.1.  Simplified SID allocation

…

    = ;  Node k has a classic IPv6 loopb= ack address A:k::/128  whic= h is

    = ;  advertised in the IGP

[Shunwan] Maybe “A:k::/128” here would be A:k::/32?

 

#2

2.4.  SR-L3VPN

…

The reader can easily infer all the other SR-IPVPN instantiati= ons:

  +---------------------------------+------------= ----------------------+

  | Route at ingress PE(1)    =       | SR-VPN= Egress SID of egress PE(8)|

  +---------------------------------+------------= ----------------------+

  | IPv4 tenant route with egress   | End.DT4 function bound to &nb= sp;      |

  | tenant table lookup    &nb= sp;        | IPv4-tenant-100 table      &n= bsp;     |

  +---------------------------------+------------= ----------------------+

  | IPv4 tenant route without egress| End.DX4 function bo= und to        |

  | tenant table lookup    &nb= sp;        | CE-C (IPv4)        =             &nb= sp; |

  +---------------------------------+------------= ----------------------+

  | IPv6 tenant route with egress   | End.DT6 function bound to &nb= sp;      |

  | tenant table lookup    &nb= sp;        | IPv6-tenant-100 table      &n= bsp;     |

  +---------------------------------+------------= ----------------------+

  | IPv6 tenant route without egress| End.DX6 function bo= und to        |

  | tenant table lookup    &nb= sp;        | CE-C (IPv6)        =             &nb= sp; |

  +---------------------------------+------------= ----------------------+

[Shunwan] May we add an End.DT46 case here?=

 

#3

2.7.1.  EVPN Bridging

…

   Nodes 1, 4 and 8 are going to exchange the End.DT= 2M SIDs via BGP-

   based EVPN Type-3 route.  Upon reception of the EVPN Type-3 routes,

   each node build its own replication list per L2 t= able that will be

   used for ingress BUM traffic replication.&= nbsp; The replication lists are

   the following:

[Shunwan]“Node= s 1, 4 and 8”here should be “Nodes 1, 3 and 8 …”

 

#4

2.7.4.  EVPN Integrated Routing Bridging (IRB)

…

   When node 1 receives a packet P from CE-A destine= d to 20.20.20.20

   from a host (10.10.10.11), P looks up its L2 tabl= e T1 MAC-DA lookup

   to find the associated SID.  It pushes an outer IPv6 header with<= /span>

   SA=3DA:1::, DA=3DB:8:D2C:: and NH=3D59.&nb= sp; Note that no additional header is

   pushed.  Node 8 then forwards the resulting packet on the shortest

   path to B:8::/32.  EVPN intra-subnet forwarding is then achieved.=

[Shunwan] Should “from a host (10.10.10.11)” be  “from a host (20.20.20.11), ” here?.

Or any other address belongs the same network se= gment as the destination address.

 

#5

2.8.2.  SR policy at a midpoint

…

   Let us consider P2 when it is received by node 2 = and let us assume

   that node 2 is configured to steer B:7::/32 in a = T.Insert behavior

   associated with SR policy <B:3:C4::, B:5:1::&g= t;.

 

   In such a case, node 2 would send the following m= odified packet P2 on

   the link to 4:

[Shunwan] Should “the link to 4”= ; be “the link to 3” here?

 

#6

2.9.  End-to-End policy with intermediate BSID

…

   B:3:C4:: realizes the low-latency path from the i= ngress PE to the

   egress PE.  This is the underlay optimization part of the<= /p>

   intermediate policy.

 

   B:9:A1:: and B:6:A2:: represent two SR-aware NFV = applications

   residing in containers respectively connected to = node 9 and 6.

[Shunwan]

Should “B:3:C4:: realizes the low-latency path <= span lang=3D"ZH-CN"> …”here be “B:2:B1:: re= alizes the low-latency path …”?

AND we see only 2 reference topologies in page 4= & 9, but cannot find node 9 within them, maybe need another reference = topology here?

 

Again, I think this draft is very useful, it can help us under= stand and implement SRv6 network programming faster.

I think it should be adopted by the WG.

 

Thanks,

Shunwan

____________________________________________________=
_____________________________________________________________________<=
/o:p>
 
Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.
 
This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;
they should not be distributed, used or copied witho=
ut authorisation.
If you have received this email in error, please not=
ify the sender and delete this message and its attachments.
As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.

Thank you.
--_000_19AB2A007F56DB4E8257F949A2FB9858E5BFB62DNKGEML515MBSchi_-- From nobody Thu Jul 11 08:38:15 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A0AEC120270 for ; Thu, 11 Jul 2019 08:38:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -16.204 X-Spam-Level: X-Spam-Status: No, score=-16.204 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, HTML_MESSAGE=0.001, PDS_NO_HELO_DNS=1.295, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=google.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id T45gdmQbxFhd for ; Thu, 11 Jul 2019 08:38:11 -0700 (PDT) Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) (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 ACDBA12023E for ; Thu, 11 Jul 2019 08:38:08 -0700 (PDT) Received: by mail-wm1-x32b.google.com with SMTP id s15so6147707wmj.3 for ; Thu, 11 Jul 2019 08:38:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=ygvF8atFKwdX/y9WN7x+r8nWC2BwaAMO4FtnE4+fL8M=; b=jWsr8x+b/zQ1ZeoBNG998kZCNyp3/PmkI9E7nYfDoWXi1RNWejcnccR91dvs4a+Tft VetEg9BTyPClOwkVV4E/XUL+qAVHxheSTly0wTD0Q13hpyrqrKHo5D9tpqa7twI1cNeP jQjsqg/XvKcMdDzZe3tNRo9L7aMtfuNW9y8mUkZCt4T7SBEwd3CB1nvTdpYpfQ9OSoxU nuDzIxEWs9x7sf7me/kE81KuTYl2n1E2f5OzLfR+ctbydfbBvJxIu0OSBnGggo3AuSvP PE/WDD8Rrtv6/1jwp6wcwGDcnrxo7xFfTGAkkEbG6CHdeJN+SR4VxEzjhgRtzrBmNLaJ 94Cg== 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; bh=ygvF8atFKwdX/y9WN7x+r8nWC2BwaAMO4FtnE4+fL8M=; b=tFu6dj93V7AqvZRrL2bUgMDqEWInP38rBKHlY4110n2+Rz3kInBu53m6neafBpnzPZ Lt1lF5AA+8pFzRGaK/jFifl0FBbB0jX8jLbuuDesBRqxYA+3JyUL0ITCEhhYU6QXEz5n mSmg1maW6vs2y69BaNaJInCEEN4J5W3lxisVpTDPapWAJyPMRV2hhdV2YisLlJ3AdAFA 4OuYYm0ntsQPkK18VsePsyHPk1Ux6BBaQp4tqmvgZNVQxgC9B13YHTBPZq/p4bCH9GIT HG+uejxA6WxMhFzVdQvCE8TTSfwYtNLcv6Rhw73HoRLrUIon9Yn4d+AmkEgQ7qnI1WVs Skvg== X-Gm-Message-State: APjAAAX+0v3O/x35znGFj5reI02AWH9tZ9AQZWxh0vuuvQDd78vrPIub qh8LEOQFH2fW7/2Mn7ttz4Bj0M0UmlhqboaUj521joIJRpI+ew== X-Google-Smtp-Source: APXvYqzcblSxd4dTeNxtOst8sH40UbSpzYFDhe5xvmy5GISz4ykX7NL4lS0MYDzbTcVZuINNjswfGlMByXAzu/wK8nQ= X-Received: by 2002:a7b:cd09:: with SMTP id f9mr4612785wmj.64.1562859486199; Thu, 11 Jul 2019 08:38:06 -0700 (PDT) MIME-Version: 1.0 From: Rob Shakir Date: Thu, 11 Jul 2019 08:37:54 -0700 Message-ID: To: SPRING WG List Content-Type: multipart/alternative; boundary="00000000000082d426058d69945c" Archived-At: Subject: [spring] Agenda for IETF 105 Published X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jul 2019 15:38:14 -0000 --00000000000082d426058d69945c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi SPRING WG, Bruno and I have published the agenda for IETF 105 -- please see https://datatracker.ietf.org/doc/agenda-105-spring/ for details. Once again, we were vastly oversubscribed for time in this meeting - with almost 5 hours of requests for a 2 hour meeting. Most of these requests are for documents that are not discussed on the mailing list, and many of them are for new work. This makes the job of making sure that we have productive time face-to-face as a working group very difficult for the chairs. This is something that Bruno and I are discussing, and will aim to cover during our short slot at the beginning of the agenda. To make sure that our meeting is as productive as possible: - if you're a WG participant: please read the drafts before the meeting, - if you're presenting: please avoid giving detailed overviews of the content of your document, and focus on outstanding open technical issues= , or questions that you have for the SPRING working group. If you have been allocated time, please send your slides by *Monday July 22nd, at 10:00 EST*. Slides that are received after this time may not be included in the meeting materials. If you were not allocated time, please use this as a gentle shove to discuss your draft on the mailing list. We look forward to meeting in Montr=C3=A9al. Safe travels, Bruno and Rob. --00000000000082d426058d69945c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi SPRING WG,

Bruno and I have p= ublished the agenda for IETF 105 -- please see=C2=A0https://datatracker.ietf.org/doc/agenda-105-spring/=C2= =A0for details.

Once again, we were vastly oversubscri= bed for time in this meeting - with almost 5 hours of requests for a 2 hour= meeting. Most of these requests are for documents that are not discussed o= n the mailing list, and many of them are for new work. This makes the job o= f making sure that we have productive time face-to-face as a working group = very difficult for the chairs. This is something that Bruno and I are discu= ssing, and will aim to cover during our short slot at the beginning of the = agenda.

To make sure that our meeting is as productive= as possible:
  • if you're a WG participant: please read t= he drafts before the meeting,
  • if you're presenting: please avoi= d giving detailed overviews of the content of your document, and focus on o= utstanding open technical issues, or questions that you have for the SPRING= working group.
If you have been allocated time, please s= end your slides by Monday July 22nd, at 10:00 EST. Slides that are r= eceived after this time may not be included in the meeting materials.
=

If you were not allocated time, please use this as a gentle= shove to discuss your draft on the mailing list.

We l= ook forward to meeting in Montr=C3=A9al.

Safe travels,=
Bruno and Rob.


--00000000000082d426058d69945c-- From nobody Fri Jul 12 04:25:27 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D397012048E for ; Fri, 12 Jul 2019 04:25:26 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.703 X-Spam-Level: X-Spam-Status: No, score=-0.703 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, PDS_NO_HELO_DNS=1.295, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sha24XoHr1gq for ; Fri, 12 Jul 2019 04:25:25 -0700 (PDT) Received: from mail-io1-xd2a.google.com (mail-io1-xd2a.google.com [IPv6:2607:f8b0:4864:20::d2a]) (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 2820412047B for ; Fri, 12 Jul 2019 04:25:25 -0700 (PDT) Received: by mail-io1-xd2a.google.com with SMTP id f4so19549054ioh.6 for ; Fri, 12 Jul 2019 04:25:25 -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:content-transfer-encoding; bh=KopIGz/oLQSNqLTIkbzfGA4XC2sQVpll8vB5VOt3Qqo=; b=eTym6GeHGGfTGnIO4+eAT67XZTRE9x3DbfGNOp+bukxjV+cJrDdwXDhL54i8PTgXJD 2v47MvWHM0nx0FIbDSQe4bVcjIakWpYpa+M2HqFkPy5mq0pqNoThApRn6oneUVIBnkoG 4ZZ/AlW+cVoTuL07aSerh5HSoauSmW+HWgRrogQvfFtz5BJwkHvY5/YXoSBQtez2MrPt SZJ9kHUjkYx+Ze3+0ECHq2TvQxcA98EK+ykFJdrgKOJAnftl7eHBUyE2bJxSjNB6+En8 h9NuS0wGBMhxZZ+fBV1LhcFgsY+fjNHNoHlAbK4AlQQiCi/mJyhW87cFzRrfCgmNX+mJ RKhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=KopIGz/oLQSNqLTIkbzfGA4XC2sQVpll8vB5VOt3Qqo=; b=qwBYtTCzjpOzLR+B343MHzixGnQBzmdEMcQ3JzlSxwKQYcbHcF1sBLTV9lTr2BU0GF jURrmIGhIulW11c4MZdTQWG7hLC2/ZYZ+WzJXXkHmrZeiI1LMdeHSVUo67webZ9XSvu+ hNOD+AT2g2rX97EmmPEOyT4iZRaxXp5OkyZap82SGD2+O+QDY5uN+DqDGPp0CC5a486v glDZUYtVHSutmNYGF5Mwh+QzywmIjmUEPl+FyQrHymOqH1OVXdVjNIv3ZekrQHoPKGvU aP3sZUlTybBMZFgR+nsXhB3egT/lW+CO12ajQYaOiQ6ez4NNiabiZpm3x1K05TXhtfGp Uwnw== X-Gm-Message-State: APjAAAWrWXZoxdsj0hAJAxqIp1MEfata5KqOQlbXGnuCZykiCf0PZdrB esFzV+pIT4siNoMNNi0fmaESb+V5qEj6L0ojmeo= X-Google-Smtp-Source: APXvYqw8SN+Gsvp8KTB1Oik7xYAHwPyxLQXcT5eVrrXGQMvQQNbNfOmmPQzcF+z9UvN/h8tI97PEja4FiEC+Yv7wjME= X-Received: by 2002:a5e:9319:: with SMTP id k25mr10773784iom.137.1562930724220; Fri, 12 Jul 2019 04:25:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dhruv Dhody Date: Fri, 12 Jul 2019 16:54:47 +0530 Message-ID: To: Rob Shakir Cc: SPRING WG List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [spring] WG Adoption Call: draft-guichard-spring-nsh-sr X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Jul 2019 11:25:27 -0000 Hi Chairs, I am late to this by a few days, but for what it's worth - I support the adoption. - Section 3, some more text on handling for cache should be added (ageing, handling for cache-miss etc). In case this is all implementation internal details, we could spell that out! Nits - Expand NSH in Title - Expand SFF,SFP on first use - RFC 2119 boilerplate is missing - Formatting in Section 6 is off, line crossing 80 characters. Thanks! Dhruv On Thu, Jun 27, 2019 at 11:44 AM Rob Shakir wrote: > > Hi SPRING WG, > > This email initiates a two week working group adoption call for draft-gui= chard-spring-nsh-sr. This follows the discussion that we had in the last fe= w IETF meetings, and particularly the focused discussion we had at IETF 104= regarding service chaining and SPRING. > > Please indicate your support, comments, or objections for adopting this d= raft by Wednesday July 10th, 2019.. We are particularly interested in heari= ng from WG members who are not authors of this draft, and those folks that = are willing to spend time working on this draft after adoption. > > We are also looking for volunteers who can provide a technical review of = the content of the draft at a later stage of its progress through the worki= ng group (e.g., before WGLC). > > In parallel - we'll send an IPR poll to the working group and authors. Th= e currently disclosed IPR can be found in the datatracker. > > Thanks! > Rob & Bruno. > > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Fri Jul 12 04:25:55 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BE690120477 for ; Fri, 12 Jul 2019 04:25:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.703 X-Spam-Level: X-Spam-Status: No, score=-0.703 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, PDS_NO_HELO_DNS=1.295, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TbxCWi1QzOKO for ; Fri, 12 Jul 2019 04:25:53 -0700 (PDT) Received: from mail-io1-xd35.google.com (mail-io1-xd35.google.com [IPv6:2607:f8b0:4864:20::d35]) (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 56A2C120471 for ; Fri, 12 Jul 2019 04:25:53 -0700 (PDT) Received: by mail-io1-xd35.google.com with SMTP id k8so19622085iot.1 for ; Fri, 12 Jul 2019 04:25:53 -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:content-transfer-encoding; bh=JiyNaA17cu/W2+QEs7697IWLBLGKXyAL9Bf+wrwBcf8=; b=atkIrP5xxHjBP45xoA1jIka7YgoiH43ZxIEcyYbku2+7zfb9bzQS1QGOrAsAr0D1sB nZNLKXA06wKkIyfHhL8I9udt1exS/hri+z4n8re2CHYeaYTH4QrVcRBKq1r770FlRgtX gphkKUGIUjCd9HqNCL4DFbMKO72C2ZTEART2z2uj79nxPoQUqlAGSYzV0dclBtiVtQ7H 40VfLz/xr24uoP6Crlnbnm92Kqf9be0oemxiHK58LlM97HkTwKnWWl7auN7s1aCXdz8C E1Aic0fO7SL86T3UZPIEw+w5zrAj8KkWEUWojmc8Dasq7Z4QXngxiR7dSa5ykh/a+Ms7 lsvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=JiyNaA17cu/W2+QEs7697IWLBLGKXyAL9Bf+wrwBcf8=; b=Mg2H1+NdvCy+s7oh09q/zlcFxxZr3Ec5Z/6NzQthteehQZeboowGA2EAbWSYWkHIXU 4EizTnykgFZPaMOiUJklKa7SOmA6VXTUuENVHTEbgd2WLOvvO+gxYBdhr5zMpZ/s8N5X TdEPaEF4H4NM1ARw6HWN9l9SkeQJvo1JgCB9u92LEZ55uHdRE8OeaPGxRDM9QOMGo6+H CP1d9uGWM8dv+UlIQSO/y12QeA5g7RENdC0YlNMihKpYUkOZahch1JWPFApn24xOrA1s No4LESedpcuwFki7qHRLF0OFzBWeGIlKH6w27dC/p2oRjANnpMPQRwnzs9E04TMhQS9S gHww== X-Gm-Message-State: APjAAAXp/cl3eX/d9Ep1J7kD+pZTOsAGNGJxTnQ5XLVjQe1yrWXsp3UH E8WXmEJF/BCtPnBzmfw1iCSEgkcHrwGviBMoCDSUBEFR X-Google-Smtp-Source: APXvYqzJbuz0yJSOZCxxKsc4ieQe2blI/keKC1Mz+fay4pyiUeWzNBohZyG3IajYKCJziS94F7zDpsXptcFXhrU85IU= X-Received: by 2002:a6b:f80e:: with SMTP id o14mr7260305ioh.1.1562930752405; Fri, 12 Jul 2019 04:25:52 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dhruv Dhody Date: Fri, 12 Jul 2019 16:55:16 +0530 Message-ID: To: Rob Shakir Cc: SPRING WG List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Jul 2019 11:25:55 -0000 Hi Chairs, Again, I am late to this by a few days, but for what it's worth - I support the adoption so that WG can enhance this work. Nits - - s/IP networks/IPv6 networks/ in Abstract - expand VNF, VM, SC Policy on first use Thanks! Dhruv On Thu, Jun 27, 2019 at 11:45 AM Rob Shakir wrote: > > Hi SPRING WG, > > This email initiates a two week working group adoption call for draft-xuc= lad-spring-sr-service-programming. This follows the discussion that we had = in the last few IETF meetings, and particularly the focused discussion we h= ad at IETF 104 regarding service chaining and SPRING. > > Please indicate your support, comments, or objections for adopting this d= raft by Wednesday July 10th, 2019. We are particularly interested in hearin= g from WG members who are not authors of this draft, and those folks that a= re willing to spend time working on this draft after adoption. > > We are also looking for volunteers who can provide a technical review of = the content of the draft at a later stage of its progress through the worki= ng group (e.g., before WGLC). > > In parallel - we'll send an IPR poll to the working group and authors. Th= e currently disclosed IPR can be found in the datatracker. > > Thanks! > Rob & Bruno. > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Fri Jul 12 14:11:44 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 70BAB1203C9 for ; Fri, 12 Jul 2019 14:11:42 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.704 X-Spam-Level: X-Spam-Status: No, score=-0.704 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, PDS_NO_HELO_DNS=1.295, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=broadcom.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 YgFdmVpQLop9 for ; Fri, 12 Jul 2019 14:11:39 -0700 (PDT) Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) (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 7228112030D for ; Fri, 12 Jul 2019 14:11:38 -0700 (PDT) Received: by mail-lf1-x129.google.com with SMTP id p197so7337485lfa.2 for ; Fri, 12 Jul 2019 14:11:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:from:date:message-id:subject:to:cc; bh=EhHCPM3SxPsRWaSPWzxyeV/ATF349FZrsWCh4erMioU=; b=Q3PnLpRYNvNL4sU5x6yU4IEzHK9H/z1Wo1sf2fOJtGUUtbMa1lmh1WHtZJYZ5ibnBd RtbfvruVIE3PSNi67Bc0kDwd5mrjLwhCWm7Q65MZAYXVLp2vP9VqPcPYo6XyXZO/NDZn E2frarUuw2uwkYyMp6KkwaMwIlXFmTY3d/KJg= 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=EhHCPM3SxPsRWaSPWzxyeV/ATF349FZrsWCh4erMioU=; b=pMe6Nj1uXBeotsb3hNNmJd8WAOnEJy5ZzSTGI+2EPdpKxpmMDn+MO9/3EzkN5ZFRoJ slfjox/S0rd6uVepudy3E+55OmBhxxaekL7pBYwBCYT84NEsepF2/hguZos5XO4KMRtP hMzb9Ur+Z3xXDY8FLsIGd0q/vOom1XgsLRnGL+zn2J/hhmyDb/82yHSH8awsTOSGBc9P Z9A77iWnYS7w5F0f1zEqV6/de/ITTKIFlZsS8JP1y1xz+Q4gWYljuqPRtP+nx7Vm5vst d+JlOTgGm/JnbFDX7drAJeTBqn+rKBpwsb3hVRAkeHybO9vn+nb0ac7wjO14K1IZljXV MZiw== X-Gm-Message-State: APjAAAVWtDsYxd1BK92L+Cfp40w3Lp75VpcDC6ab0cn3ID4k1TrIs6sr +JDpRM9xwbCJC4A7A/2ghrfcY+YcAbE1mE9RlfVTiw== X-Google-Smtp-Source: APXvYqz0Z2J0oQSjb6S6VEWxcnRK0BL36rymb3fUi4O2FQEZnxI2v+mjpvwMzG1jMChfh+FyS6+Clby75USBQB1sy/E= X-Received: by 2002:ac2:4c82:: with SMTP id d2mr5860562lfl.89.1562965896383; Fri, 12 Jul 2019 14:11:36 -0700 (PDT) MIME-Version: 1.0 From: John Lemon Date: Fri, 12 Jul 2019 14:11:25 -0700 Message-ID: To: Ron Bonica , Mark Smith Cc: SPRING WG , IPv6 List Content-Type: multipart/alternative; boundary="0000000000000d0b8b058d825b20" Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Jul 2019 21:11:42 -0000 --0000000000000d0b8b058d825b20 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I would much rather see support for only 32-bit SIDs, with no other optional sizes. Optional sizes tend to become requirements, and lead to configuration hassles. Also, I see 80 bytes as much too small a goal to fit into. 128 bytes seems a more reasonable lower bound. Regards, John On Tue, 09 July 2019 13:37 UTC Mark Smith wrote: Hi Ron, On Tue., 9 Jul. 2019, 23:01 Ron Bonica, ; wrote: > Mark, Tom, > > Would mandating both satisfy your objections? > Well enough. I still prefer the idea of a single size, however at least requiring support for both sizes would avoid the trap of unintentionally buying a device that can only do 16 bit SIDs when you're using 32 bit SIDs. That can happen because that detail might be in small print on a spec sheet or missed in an RFI/RFP response. I think 32 bits should be the default SID size, so that people have to make a conscious decision to use 16 bits, and therefore if 16 bits ends up being too small in the future, they hopefully already know they'll be incurring the operational costs and possible customer service impacts of having to change from 16 to 32 SIDs. Regards, Mark. > Ron > > > > Juniper Business Use Only > > -----Original Message----- > From: spring ; On Behalf Of Joel M. Halpern > Sent: Monday, July 8, 2019 6:48 PM > Cc: SPRING WG ;; IPv6 List ; > Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus > > While one can argue forever abotu where the critical points are, I think > we all know that all other things being equal (yeah, I know, they never > are) smaller is better. > It thus seems clear to me that we should simply mandate support for both > 16 and 32 bit SIDs in the CRH. > > Yours, > Joel > > On 7/8/19 6:28 PM, Ron Bonica wrote: > > Bob, > > > > SR encodings that require 128-bytes of overhead consume excessive > bandwidth: > > > > - on network links > > - in ASICS > > > > While the former is interesting, the later is probably more > significant. In order to process at high speeds, ASICs need to access th= e > entire IPv6 header chain. So, they copy the header chain, including all > extension headers, from buffer memory to on-chip memory. As the number o= f > bytes in the header chain increases, so does the cost of that copy. And the > longer the header chain, the less accessible the technology becomes to > low-cost ASICs. > > > > So, the most significant benefit may be in keeping that copy under 128 > bytes. > > > > > > > Ron > > > > > > > > > > > > Juniper Business Use Only > > > > -----Original Message----- > > From: Bob Hinden ; > > Sent: Saturday, July 6, 2019 5:42 PM > > To: Ron Bonica ; > > Cc: Bob Hinden ;; Mark Smith > > ;; Tom Herbert ;; SPRING W= G > > ;; IPv6 List ; > > Subject: Re: Comments on draft-bonica-spring-srv6-plus > > > > Ron, > > > >> On Jul 6, 2019, at 2:05 PM, Ron Bonica 40juniper.net@dmarc.ietf.org>; wrote: > >> > >> Hi Mark, > >> > >> In my experience, operators object when SR overhead consumes more than > 80 bytes. Also, I have encountered two classes of operator: > > > > What is special about 80? Why not 64, 128, 256? > > > > Bob > > > > > >> > >> =E2=80=A2 Those who avoid strictly-routed segments > >> =E2=80=A2 Those who rely heavily on strictly-routed segments > >> > >> Those who avoid strictly-routed segments rarely generate SID Lists tha= t > contain more than 8 entries. So, they are generally OK with 32-bit > encoding. This is because with 32-bit encoding, the total SR overhead is > exactly 80 bytes (i.e., 40 bytes for the IPv6 header and 40 bytes for the > CRH). > >> > >> By contrast, those who rely on strictly-routed segments regularly > generate SID Lists that contain more than 8 entries. So, they are generally > required 16-bit encoding. > >> > >> IMHO, the operator understands its needs better than we do. We should > support both. Let the operator decide at run time. > >> > >> > > >> Ron > >> > >> > >> From: Mark Smith ; > >> Sent: Wednesday, July 3, 2019 9:08 PM > >> To: Tom Herbert ; > >> Cc: Ron Bonica ;; SPRING WG ;; > >> 6man WG ; > >> Subject: Re: Comments on draft-bonica-spring-srv6-plus > >> > >> > >> > >> On Thu., 4 Jul. 2019, 06:06 Tom Herbert, ; wrote: > >> On Wed, Jul 3, 2019 at 12:44 PM Ron Bonica ; wrote: > >>> > >>> Hi Tom, > >>> > >>> Thanks for the review. > >>> > >>> On Friday, I will update draft-bonica-6man-comp-rtg-hdr. It will > contain a section on mutability. It will say: > >>> > >>> - the Segments Left field is mutable > >>> - every other field in the CRH is immutable > >>> > >>> I will also update draft-bonica-6man-vpn-dest-opt and > draft-bonica-6man-seg-end-opt. Both of those request an IANA option type > with the CHG bit equal to 0. So they are both immutable. > >>> > >>> SID encoding isn't entirely opportunistic. Since the last IETF, we > realized that it would be burdensome for every vendor to support all three > SID lengths. So, we said that implementations MUST support 32-bit encodin= g > and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely). > >> > >> This sounds dicey from an interoperability and flexibility point of > >> view. Supposed I've deployed a network where everyone is using 16 > >> bits SIDs. But, then for some reason I need to switch vendors for a > >> small part of the network and their implementation doesn't support 16 > bits. > >> Do I need to up the MSV and make all SIDs to be 32 bits just on the > >> off chance that one of the new nodes might be in some SID list? > >> > >>> > >>> A side effect of this decision is that a node should only send CRH's > with 16-bit encoding every other node in the domain supports 16-bit > encoding.. So, network operators will need to configure the SID length on > each node, with the default being 32. > >> > >> Well, in light the above problem, I have to wonder if it's better to > >> only support 32 bits. The leap from 128 bits to 32 bits is much more > >> consequential than going from 32 to 16 bits. Other than that, it > >> simplifies the protocol, reduces support and test matrix, ensures > >> interoperability, etc. > >> > >> One single size is much better. > >> > >> I think most people will pick the larger size, regardless of their > functional SID space need, to avoid the possibility of getting it wrong and > then having to do a lot of after hours and possibly service impacting wor= k > in the future to expand from the smaller to larger size. > >> > >> Implementations would also be simpler, so less opportunities for > implementation bugs. > >> > >> It also means no possibility of configuration errors because the size > is a constant rather than a settable parameter. > >> > >> A lot of the principles in RFC 5505 - "Principles of Internet Host > Configuration" - seem to me to be equally applicable to network interior > protocols. > >> > >> For example, I think the whole of "2.1. Minimize Configuration" fully > applies here. > >> > >> Regards, > >> Mark. > >> > >> > >> > >> > >> Tom > >> > >>> > >>> > > >>> Ron > >>> > >>> > >>> > >>> Juniper Business Use Only > >>> > >>> -----Original Message----- > >>> From: Tom Herbert ; > >>> Sent: Wednesday, July 3, 2019 2:48 PM > >>> To: Ron Bonica ; > >>> Cc: SPRING WG ;; 6man WG ; > >>> Subject: Comments on draft-bonica-spring-srv6-plus > >>> > >>> Hi Ron, > >>> > >>> Thanks for the draft. > >>> > >>> I think the name SRV6+ might be a little misleading in that it could > >>> be misinterpreted as SRV6+ being a superset of SRV6. Specifically, > >>> SRV6+ doesn't allow 128 bit SIDs which seems inherent in SRV6 and so > >>> the primary function (and implementation) of SRV6 isn't compatible. I= t > doesn't seem like it would be that much effort to allow a 128 bit SID siz= e > to be compatible. > >>> > >>> I don't understand the rationale for needing a MSV to be explictly > configured throughout the domain. Couldn't the appropriate SID size be > chosen by the sender at run time. For instance, if all the SIDs in a list > are less than 65,536 then 16 bit SIDs can be used, else 32 bit SIDs are > used (I assume 16 and 32 bit SIDs are in same number space). > >>> Since CRH has the bits stating the SID length there is no ambiguity a= t > the receiver. SID compression is opportunistic and it's always good > practice to avoid situations that require wide scale renumbering. > >>> > >>> Please add a section on mutability requirements of protocol fields so > that there is no ambiguity. > >>> > >>> Tom > >> > >> -------------------------------------------------------------------- > >> IETF IPv6 working group mailing list > >> ipv6@ietf.org > >> Administrative Requests: > >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_ma= i > >> lman_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDT= XcW > >> zoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8= Tbm > >> IE9-axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g= 4 > >> 8o5Y&e=3D > >> -------------------------------------------------------------------- > >> > >> Juniper Business Use Only > >> -------------------------------------------------------------------- > >> IETF IPv6 working group mailing list > >> ipv6@ietf.org > >> Administrative Requests: > >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_ma= i > >> lman_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDT= XcW > >> zoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8= Tbm > >> IE9-axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g= 4 > >> 8o5Y&e=3D > >> -------------------------------------------------------------------- > > -------------------------------------------------------------------- > > IETF IPv6 working group mailing list > > ipv6@ietf.org > > Administrative Requests: > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mai= l > > man_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXc= Wzo > > CI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8Tbm= IE9 > > -axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g48o5= Y > > &e=3D > > -------------------------------------------------------------------- > > > > _______________________________________________ > spring mailing list > spring@ietf.org > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailman= _listinfo_spring&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI= &r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8TbmIE9-ax= KqsGSOS_eDBvbSVJQVZBo&s=3DYYXoZxBfdVxmcXiO-tFkzBWknA5RrEzAz_IQTP1vy_0&e=3D > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --0000000000000d0b8b058d825b20 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I would much rather see support for only 32-bit SIDs,= with no other optional sizes. Optional sizes tend to become requirements, = and lead to configuration hassles. Also, I see 80 bytes as much too small a= goal to fit into. 128 bytes seems a more reasonable lower bound.

Regards, John

On Tue, 09 July 2019 = 13:37 UTC Mark Smith <markzzzs= mith@gmail.com> wrote:

Hi Ron,

On Tue., 9 Jul. 2019, 2= 3:01 Ron Bonica, <rbonica=3D
40juniper.net@dmarc.ietf.org>; wrote:

> Mark, Tom,=
>
> Would mandating both satisfy your objections?
>
<= br>Well enough.

I still prefer the idea of a single size, however at= least requiring
support for both sizes would avoid the trap of unintent= ionally buying a
device that can only do 16 bit SIDs when you're usi= ng 32 bit SIDs. That can
happen because that detail might be in small pr= int on a spec sheet or
missed in an RFI/RFP response.

I think 32 = bits should be the default SID size, so that people have to make
a consc= ious decision to use 16 bits, and therefore if 16 bits ends up being
too= small in the future, they hopefully already know they'll be incurring<= br>the operational costs and possible customer service impacts of having to=
change from 16 to 32 SIDs.


Regards,
Mark.



= > =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Ron
><= br>>
>
> Juniper Business Use Only
>
> -----Orig= inal Message-----
> From: spring <spring-bounces@ietf.org>; On Behalf Of Joel M. Halpern> Sent: Monday, July 8, 2019 6:48 PM
> Cc: SPRING WG <spring@ietf.org>;; IPv6 List <ipv6@ietf.org>;
> Subject: Re: [spri= ng] Comments on draft-bonica-spring-srv6-plus
>
> While one can= argue forever abotu where the critical points are, I think
> we all = know that all other things being equal (yeah, I know, they never
> ar= e) smaller is better.
> It thus seems clear to me that we should simp= ly mandate support for both
> 16 and 32 bit SIDs in the CRH.
><= br>> Yours,
> Joel
>
> On 7/8/19 6:28 PM, Ron Bonica w= rote:
> > Bob,
> >
> > SR encodings that require= 128-bytes of overhead consume excessive
> bandwidth:
> >> > - on network links
> > - in ASICS
> >
> = > While the former is interesting, the later is probably more
> si= gnificant.=C2=A0 In order to process at high speeds, ASICs need to access t= he
> entire IPv6 header chain. So, they copy the header chain, includ= ing all
> extension headers, =C2=A0from buffer memory to on-chip memo= ry. As the number of
> bytes in the header chain increases, so does t= he cost of that copy. And the
> longer the header chain, the less acc= essible the technology becomes to
> low-cost ASICs.
> >
&= gt; > So, the most significant benefit may be =C2=A0in keeping that copy= under 128
> bytes.
> >
> >
>
> > Ro= n
> >
> >
> >
> >
> >
> = > Juniper Business Use Only
> >
> > -----Original Mess= age-----
> > From: Bob Hinden <bob.hinden@gmail.com>;
> > Sent: Saturday, July 6, = 2019 5:42 PM
> > To: Ron Bonica <rbonica@juniper.net>;
> > Cc: Bob Hinden <bob.hinden@gmail.com>;; Mark Smit= h
> > <markzzzsmith@g= mail.com>;; Tom Herbert <t= om@herbertland.com>;; SPRING WG
> > <spring@ietf.org>;; IPv6 List <ipv6@ietf.org>;
> > Subject: Re: Comments on = draft-bonica-spring-srv6-plus
> >
> > Ron,
> >> >> On Jul 6, 2019, at 2:05 PM, Ron Bonica <rbonica=3D
&g= t; 40juniper.net@dmarc.ietf= .org>; wrote:
> >>
> >> Hi Mark,
> >= ;>
> >> In my experience, operators object when SR overhead = consumes more than
> 80 bytes. Also, I have encountered two classes o= f operator:
> >
> > What is special about 80? =C2=A0 Why = not 64, 128, 256?
> >
> > Bob
> >
> >> >>
> >> =C2=A0 =C2=A0 =C2=A0=E2=80=A2 Those who av= oid strictly-routed segments
> >> =C2=A0 =C2=A0 =C2=A0=E2=80=A2= Those who rely heavily on strictly-routed segments
> >>
>= ; >> Those who avoid strictly-routed segments rarely generate SID Lis= ts that
> contain more than 8 entries. So, they are generally OK with= 32-bit
> encoding. This is because with 32-bit encoding, the total S= R overhead is
> exactly 80 bytes (i.e., 40 bytes for the IPv6 header = and 40 bytes for the
> CRH).
> >>
> >> By con= trast, those who rely on strictly-routed segments regularly
> generat= e SID Lists that contain more than 8 entries. So, they are generally
>= ; required 16-bit encoding.
> >>
> >> IMHO, the ope= rator understands its needs better than we do. We should
> support bo= th. Let the operator decide at run time.
> >>
> >><= br>>
> >> Ron
> >>
> >>
> >= > From: Mark Smith <markzzz= smith@gmail.com>;
> >> Sent: Wednesday, July 3, 2019 9:0= 8 PM
> >> To: Tom Herbert <tom@herbertland.com>;
> >> Cc: Ron Bonica <rbonica@juniper.net>;; SPRING WG = <spring@ietf.org>;;
> &g= t;> 6man WG <ipv6@ietf.org>;<= br>> >> Subject: Re: Comments on draft-bonica-spring-srv6-plus
= > >>
> >>
> >>
> >> On Thu., 4= Jul. 2019, 06:06 Tom Herbert, <t= om@herbertland.com>; wrote:
> >> On Wed, Jul 3, 2019 at = 12:44 PM Ron Bonica <rbonica@juni= per.net>; wrote:
> >>>
> >>> Hi Tom,> >>>
> >>> Thanks for the review.
> >= ;>>
> >>> On Friday, I will update draft-bonica-6man-c= omp-rtg-hdr. It will
> contain a section on mutability. It will say:<= br>> >>>
> >>> - the Segments Left field is muta= ble
> >>> - every other field in the CRH is immutable
>= ; >>>
> >>> I will also update draft-bonica-6man-vp= n-dest-opt and
> draft-bonica-6man-seg-end-opt. Both of those request= an IANA option type
> with the CHG bit equal to 0. So they are both = immutable.
> >>>
> >>> SID encoding isn't= entirely opportunistic. Since the last IETF, we
> realized that it w= ould be burdensome for every vendor =C2=A0to support all three
> SID = lengths. So, we said that implementations MUST support 32-bit encoding
&= gt; and MAY support 16 bit encoding. (We dropped 8-bit encoding entirely).<= br>> >>
> >> This sounds dicey from an interoperabilit= y and flexibility point of
> >> view. Supposed I've deploye= d a network where everyone is using 16
> >> bits SIDs. But, the= n for some reason I need to switch vendors for a
> >> small par= t of the network and their implementation doesn't support 16
> bi= ts.
> >> Do I need to up the MSV and make all SIDs to be 32 bit= s just on the
> >> off chance that one of the new nodes might b= e in some SID list?
> >>
> >>>
> >>&= gt; A side effect of this decision is that a node should only send CRH'= s
> with 16-bit encoding every other node in the domain supports 16-b= it
> encoding.. So, network operators will need to configure the SID = length on
> each node, with the default being 32.
> >>> >> Well, in light the above problem, I have to wonder if it'= ;s better to
> >> only support 32 bits. The leap from 128 bits = to 32 bits is much more
> >> consequential than going from 32 t= o 16 bits. Other than that, it
> >> simplifies the protocol, re= duces support and test matrix, ensures
> >> interoperability, e= tc.
> >>
> >> One single size is much better.
&g= t; >>
> >> I think most people will pick the larger size,= regardless of their
> functional SID space need, to avoid the possib= ility of getting it wrong and
> then having to do a lot of after hour= s and possibly service impacting work
> in the future to expand from = the smaller to larger size.
> >>
> >> Implementatio= ns would also be simpler, so less opportunities for
> implementation = bugs.
> >>
> >> It also means no possibility of con= figuration errors because the size
> is a constant rather than a sett= able parameter.
> >>
> >> A lot of the principles i= n RFC 5505 - "Principles of Internet Host
> Configuration" = - seem to me to be equally applicable to network interior
> protocols= .
> >>
> >> For example, I think the whole of "= ;2.1. Minimize Configuration" fully
> applies here.
> >= >
> >> Regards,
> >> Mark.
> >>
&= gt; >>
> >>
> >>
> >> Tom
>= >>
> >>>
> >>>
>
> >>= ;> Ron
> >>>
> >>>
> >>>> >>> Juniper Business Use Only
> >>>
> &= gt;>> -----Original Message-----
> >>> From: Tom Herbe= rt <tom@herbertland.com>;<= br>> >>> Sent: Wednesday, July 3, 2019 2:48 PM
> >>= > To: Ron Bonica <rbonica@juni= per.net>;
> >>> Cc: SPRING WG <spring@ietf.org>;; 6man WG <ipv6@ietf.org>;
> >>> Subject: Comments o= n draft-bonica-spring-srv6-plus
> >>>
> >>> H= i Ron,
> >>>
> >>> Thanks for the draft.
&= gt; >>>
> >>> I think the name SRV6+ might be a lit= tle misleading in that it could
> >>> be misinterpreted as S= RV6+ being a superset of SRV6. Specifically,
> >>> SRV6+ doe= sn't allow 128 bit SIDs which seems inherent in SRV6 and so
> >= ;>> the primary function (and implementation) of SRV6 isn't compa= tible. It
> doesn't seem like it would be that much effort to all= ow a 128 bit SID size
> to be compatible.
> >>>
>= ; >>> I don't understand the rationale for needing a MSV to be= explictly
> configured throughout the domain. Couldn't the appro= priate SID size be
> chosen by the sender at run time. For instance, = if all the SIDs in a list
> are less than 65,536 then 16 bit SIDs can= be used, else 32 bit SIDs are
> used (I assume 16 and 32 bit SIDs ar= e in same number space).
> >>> Since CRH has the bits statin= g the SID length there is no ambiguity at
> the receiver. SID compres= sion is opportunistic and it's always good
> practice to avoid si= tuations that require wide scale renumbering.
> >>>
> = >>> Please add a section on mutability requirements of protocol fi= elds so
> that there is no ambiguity.
> >>>
> &g= t;>> Tom
> >>
> >> --------------------------= ------------------------------------------
> >> IETF IPv6 worki= ng group mailing list
> >> ipv= 6@ietf.org
> >> Administrative Requests:
> >> <= a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.o= rg_mai">https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org= _mai
> >> lman_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh6= 3rsuhr6Scbfh0UjBXeMK-ndb3voDTXcW
> >> zoCI&r=3DFch9FQ82sir-= BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8Tbm
> >> I= E9-axKqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g4<= br>> >> 8o5Y&e=3D
> >> ---------------------------= -----------------------------------------
> >>
> >>= Juniper Business Use Only
> >> -------------------------------= -------------------------------------
> >> IETF IPv6 working gr= oup mailing list
> >> ipv6@iet= f.org
> >> Administrative Requests:
> >> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mai<= /a>
> >> lman_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuh= r6Scbfh0UjBXeMK-ndb3voDTXcW
> >> zoCI&r=3DFch9FQ82sir-BoLx8= 4hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6hBGzSjd8gWZ8Tbm
> >> IE9-ax= KqsGSOS_eDBvbSVJQVZBo&s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g4
&g= t; >> 8o5Y&e=3D
> >> --------------------------------= ------------------------------------
> > -------------------------= -------------------------------------------
> > IETF IPv6 working = group mailing list
> > ipv6@ietf.= org
> > Administrative Requests:
> > https:= //urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mail
&= gt; > man_listinfo_ipv6&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXe= MK-ndb3voDTXcWzo
> > CI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHc= AwrDThKP8&m=3D6hBGzSjd8gWZ8TbmIE9
> > -axKqsGSOS_eDBvbSVJQVZBo= &s=3D5jHV8xT7UgFmm8UBSu3mgTeHSTvWUiRWm9da3g48o5Y
> > &e=3D=
> > -------------------------------------------------------------= -------
> >
>
> ______________________________________= _________
> spring mailing list
> spring@ietf.org
>
> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_ma= ilman_listinfo_spring&d=3DDwIGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-nd= b3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3D6= hBGzSjd8gWZ8TbmIE9-axKqsGSOS_eDBvbSVJQVZBo&s=3DYYXoZxBfdVxmcXiO-tFkzBWk= nA5RrEzAz_IQTP1vy_0&e=3D
> __________________________________= _____________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>= ;
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draft-bonica-spring-srv6-plus Thread-Index: AQHVMdfR7FXuiav9vE+eRpnuXb6JdKa4y7cAgABUMQCABHNngIAAChoAgAMx3ACACicfkA== Date: Mon, 15 Jul 2019 01:42:35 +0000 Message-ID: References: <156203443756.5663.9945449277625935606.idtracker@ietfa.amsl.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Enabled=True; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SiteId=bea78b3c-4cdb-4130-854a-1d193232e5f4; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Owner=rbonica@juniper.net; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SetDate=2019-07-08T22:28:56.4600671Z; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Name=Juniper Business Use Only; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Application=Microsoft Azure Information Protection; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_ActionId=ea595fa3-ca21-4f13-a7c7-74cb96d9b41f; 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draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jul 2019 15:15:32 -0000 --0000000000007f019b058db9bad7 Content-Type: text/plain; charset="UTF-8" Hi Rob, I am not aware of any undisclosed IPR. Thanks, Jisu Bhattacharya Cisco On Thu, Jun 27, 2019, 11:44 AM Rob Shakir wrote: > Hi Authors, SPRING WG, > > In parallel to the call for working group adoption for > *draft-xuclad-spring-sr-service-programming* we would like to poll for > IPR. > > If you are aware of IPR that applies > to draft-xuclad-sr-service-programming please respond to this email. If you > are aware of IPR, please indicate whether it has been disclosed in > accordance to the IETF IPR rules (detailed are described in RFCs 3979, > 4879, 3669 and 5378). > > If you are an *author or contributor* please respond to this email > regardless of whether or not you're aware of any IPR. If you are not an > author or contributor, please explicitly respond only if you're aware of > IPR that has not yet been disclosed.. > > This document will not advance into the working group until such time as > we have received IPR confirmations from all authors and contributors. > > Thanks! > Rob & Bruno > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --0000000000007f019b058db9bad7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Rob,
I am not aware of any undis= closed IPR.
Thanks,
Jisu Bhat= tacharya
Cisco


On Thu, Jun 27, 2019, 11:44 AM Rob= Shakir <robjs=3D40google= .com@dmarc.ietf.org> wrote:
=
Hi Authors, SPRING WG,

In pa= rallel to the call for working group adoption for draft-xuclad-spring-sr= -service-programming=C2=A0we would like to poll for IPR.

If you are aware= of IPR that applies to=C2=A0draft-xuclad-sr-service-programming please res= pond to this email. If you are aware of IPR, please indicate whether it has= been disclosed in accordance to the IETF IPR rules (detailed are described= in RFCs 3979, 4879, 3669 and 5378).

=
If you are an author or contributor=C2=A0please respond to this email regardless of whether or not you'r= e aware of any IPR. If you are not an author or contributor, please explici= tly respond only if you're aware of IPR that has not yet been disclosed= ..

This document will not advance into the working group until such time as w= e have received IPR confirmations from all authors and contributors.
<= div class=3D"gmail_default">
Thanks!<= /div>
Rob & Bruno=C2=A0=C2=A0
_______________________________________________
spring mailing list
spr= ing@ietf.org
https://www.ietf.org/mailman/listinfo/spring<= /a>
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SN6PR05MB5485 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-15_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907150187 Archived-At: Subject: Re: [spring] Comments on draft-bonica-spring-srv6-plus X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jul 2019 16:04:48 -0000 V2VpYmluLA0KDQpUaGFua3MgZm9yIHlvdXIgY2FyZWZ1bCByZXZpZXcgYW5kIGZvciB0aGlzIHZl cnkgaW5zaWdodGZ1bCBxdWVzdGlvbi4gSXQgZG9lcyByZXF1aXJlIHNvbWUgZXhwbGFuYXRpb24u 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([2607:fb90:365e:63d6:7905:36e8:6267:a546]) by smtp.gmail.com with ESMTPSA id m4sm27800987pgs.71.2019.07.15.09.34.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 15 Jul 2019 09:34:21 -0700 (PDT) From: Gaurav Dawra Content-Type: multipart/alternative; boundary=Apple-Mail-7871DB81-73A4-4280-B55A-B57096559958 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Date: Mon, 15 Jul 2019 09:34:20 -0700 Message-Id: Cc: draft-xuclad-spring-sr-service-programming@ietf.org, SPRING WG List To: Rob Shakir X-Mailer: iPhone Mail (16C101) Archived-At: Subject: Re: [spring] IPR Poll: draft-xuclad-spring-sr-service-programming X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jul 2019 16:34:31 -0000 --Apple-Mail-7871DB81-73A4-4280-B55A-B57096559958 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Hi Not aware of any IPR. Gaurav Sent from my iPhone > On Jun 26, 2019, at 11:13 PM, Rob Shakir wrote: >=20 > Hi Authors, SPRING WG, >=20 > In parallel to the call for working group adoption for draft-xuclad-spring= -sr-service-programming we would like to poll for IPR. >=20 > If you are aware of IPR that applies to draft-xuclad-sr-service-programmin= g please respond to this email. If you are aware of IPR, please indicate whe= ther it has been disclosed in accordance to the IETF IPR rules (detailed are= described in RFCs 3979, 4879, 3669 and 5378). >=20 > If you are an author or contributor please respond to this email regardles= s of whether or not you're aware of any IPR. If you are not an author or con= tributor, please explicitly respond only if you're aware of IPR that has not= yet been disclosed. >=20 > This document will not advance into the working group until such time as w= e have received IPR confirmations from all authors and contributors. >=20 > Thanks! > Rob & Bruno =20 --Apple-Mail-7871DB81-73A4-4280-B55A-B57096559958 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit Hi

Not aware of any IPR.

Gaurav

Sent from my iPhone
Hi Authors, SPRING WG,

In parallel to the call for working group adoption for draft-xuclad-spring-sr-service-programming we would like to poll for IPR.

If you are aware of IPR that applies to draft-xuclad-sr-service-programming please respond to this email. If you are aware of IPR, please indicate whether it has been disclosed in accordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879, 3669 and 5378).

If you are an author or contributor please respond to this email regardless of whether or not you're aware of any IPR. If you are not an author or contributor, please explicitly respond only if you're aware of IPR that has not yet been disclosed.

This document will not advance into the working group until such time as we have received IPR confirmations from all authors and contributors.

Thanks!
Rob & Bruno  
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+0000 From: Linda Dunbar To: Jeff Tantsura , spring , SPRING WG , =?utf-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= Thread-Topic: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? 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APjAAAUaFGT/Rjpw54hjWTcKOLEQBjMXsL2FTtOnkBdgiRetYf35Sf8s fJBMWHgAg+ageFQfDyXZXk5GTd5r X-Google-Smtp-Source: APXvYqx5IImdG0YG80yC/eUkVrLiiYqc2xH/uC4fnFjUDk/iI23lOG2bNSDgIhcZHJa7ZyIilgTeTA== X-Received: by 2002:a17:902:704c:: with SMTP id h12mr29714387plt.318.1563230898785; Mon, 15 Jul 2019 15:48:18 -0700 (PDT) Received: from [10.5.5.194] ([50.235.77.202]) by smtp.gmail.com with ESMTPSA id e10sm18549187pfi.173.2019.07.15.15.48.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 15 Jul 2019 15:48:18 -0700 (PDT) Date: Mon, 15 Jul 2019 15:48:08 -0700 From: Jeff Tantsura To: spring , SPRING WG , "=?utf-8?Q?=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)?=" , Linda Dunbar Message-ID: In-Reply-To: References: <53f3a00b-2dc1-4762-99c3-de7f57b592d2@Spark> X-Readdle-Message-ID: b1f72412-c484-41ad-b5f9-1922458819c6@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d2d02b0_495c0ea5_c7f7" Archived-At: Subject: Re: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jul 2019 22:48:22 -0000 --5d2d02b0_495c0ea5_c7f7 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Linda, What you want is to use native MPLS when available and encapsulate MPLS p= ackets in IP/UDP when you need to travers IP, you destination in the impo= sed IP header would be that of the next SR capable device as described in= draft-ietf-mpls-sr-over-ip. Cheers, Jeff On Jul 15, 2019, 3:24 PM -0700, Linda Dunbar , wrote: > > Jeff, > > The draft-ietf-mpls-sr-over-ip only has MPLS packets being tunneled by = IP, but not reversed (IP packets tunneled over MPLS). > > Do you think it worthwhile to add some similar sections (of course with= different content), such as =46orwarding entry Construction, forwarding = procedures as in draft-ietf-mpls-sr-over-ip=3F > > Linda > > =46rom: Jeff Tantsura > Sent: Tuesday, July 09, 2019 4:03 PM > To: spring ; Linda Dunbar ; SPRING WG ; =E5=BE=90=E5=B0=8F=E8=99=8E(= =E4=B9=89=E5=85=88) > Subject: Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-ov= er-hybrid-networks: is it appropriate for not-directly connect SDWAN edge= s to use GRE/VxLAN header bits to indicate the desired SR path=3F > > +1 > > take a look at=C2=A0draft-ietf-mpls-sr-over-ip > > Cheers, > Jeff > On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5= =85=88) , wrote: > > > Hi Linda, > > > > Why not directly use the MPLSoUDP encapsulation to carry the B-SID la= bel=C2=A0so as to indicate the preferred path=3F =46or more details, plea= se read=C2=A0https://tools.ietf.org/html/draft-dukes-spring-sr-for-sdwan-= 02=23section-7.3 > > > > Best regards, > > Xiaohu > > > > > ------------------------------------------------------------------ > > > =46rom:Linda Dunbar > > > Send Time:2019=E5=B9=B47=E6=9C=889=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA= =8C) 06:26 > > > To:Linda Dunbar ; SPRING WG > > > Subject:Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan= -over-hybrid-networks: is it appropriate for not-directly connect SDWAN e= dges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > Sorry, I meant to ask: > > > > > > When the SDWAN edge nodes are NOT directly connected to the PEs of = SR domain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header= bits to indicate the desired SR Path=3F > > > > > > Linda > > > > > > =46rom: spring On Behalf Of Linda Dunba= r > > > Sent: Monday, July 08, 2019 5:11 PM > > > To: SPRING WG > > > Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-ov= er-hybrid-networks: is it appropriate for not-directly connect SDWAN edge= s to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > SD-WAN, as described by ONUG (Open Network User Group), is about po= oling WAN bandwidth from multiple service providers to get better WAN ban= dwidth management, visibility & control. > > > Because of the ephemeral property of the selected Cloud DCs, an ent= erprise or its network service provider may not have the direct links to = the Cloud DCs that are optimal for hosting the enterprise=E2=80=99s speci= fic workloads/Apps. Under those circumstances, SD-WAN is a very flexible = choice to interconnect the enterprise on-premises data centers & branch o= ffices to its desired Cloud DCs... > > > However, SD-WAN paths over public internet can have unpredictable p= erformance, especially over long distances and cross state/country bounda= ries. Therefore, it is highly desirable to place as much as possible the = portion of SD-WAN paths over service provider VPN (e.g. enterprise=E2=80=99= s existing VPN) that have guaranteed SLA and to minimize the distance/seg= ments over public internet. > > > > > > https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-hybrid-= networks/ describes a method to enforce a SD-WAN path=E2=80=99s head-end = selected route traversing through a list of specific nodes of multiple ne= twork segments without requiring the nodes in each network segments to ha= ve the intelligence (or maintaining states) of selecting next hop or next= segments. > > > > > > When a SR domain has multiple PEs with ports facing the external ne= tworks (such as the public internet or LTE termination), SD-WAN paths can= traverse the SR domain via different ingress/egress PEs resulting in dif= ferent E2E performance. > > > > > > Even with the same ingress/egress, some flows may need different se= gments across the SR Domain. It is not practical, or even possible, for P= Es to determine which Apps=E2=80=99 flows should egress. > > > Segment Routing can be used to steer packets (or path) to traverse = the explicit egress node, or explicit segments through the SR Domain base= d on the SLA requested by the SD-WAN head-end nodes. > > > > > > When the SDWAN edge nodes are directly connected to the PEs of SR d= omain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header bit= s to indicate the desired SR Path=3F > > > > > > We are looking for feedback, criticisms, or suggestion on the the p= roposed approach. > > > > > > Thank you, > > > Linda > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > > spring mailing list > > spring=40ietf.org > > https://www.ietf.org/mailman/listinfo/spring --5d2d02b0_495c0ea5_c7f7 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Linda,

What you want is to use native MPLS when available = and encapsulate MPLS packets in IP/UDP when you need to travers IP, you d= estination in the imposed IP header would be that of the next SR capable = device as described in draft-ietf-mpls-sr-over-ip.

Cheers,
Jeff
On Jul 15, 2019, 3:24 PM -0700, Lin= da Dunbar <linda.dunbar=40futurewei.com>, wrote:

&=23160;

Jeff,

&=23160;

The draft-ietf-mpls-sr-over-ip only has MPLS p= ackets being tunneled by IP, but not reversed (IP packets tunneled over M= PLS).

&=23160;

Do you think it worthwhile to add some similar= sections (of course with different content), such as =46orwarding entry = Construction, forwarding procedures as in draft-ietf-mpls-sr-over-ip=3F

&=23160;

Linda

&=23160;

=46rom: Jeff Tantsura <jefftant.ietf= =40gmail.com>
Sent: Tuesday, July 09, 2019 4:03 PM
To: spring <spring-bounces=40ietf.org>; Linda Dunbar <lin= da.dunbar=40futurewei.com>; SPRING WG <spring=40ietf.org>; =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaoh= u.xxh=40alibaba-inc.com>
Subject: Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

+1

&=23160;

take a look at&=23160;draft-ietf-mpls-sr-over-= ip

&=23160;

Cheers,

Jeff

On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh=40alibaba-inc.com>, w= rote:

Hi Linda,

&=23160;

Why not directly use the MPL= SoUDP encapsulation to carry the B-SID label&=23160;so as to indicate the= preferred path=3F =46or more details, please read&=23160;https://tools.ietf.org/html/dra= ft-dukes-spring-sr-for-sdwan-02=23section-7.3&=23160;

&=23160;

Best regards,

Xiaohu

&=23160;

----------------------------= --------------------------------------

=46rom:Linda Dunbar <linda.dunbar=40futurewei.= com>

Send Time:2019=E5=B9=B4= 7=E6=9C=889= =E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=8C= ) 06:26

Subject:Re: =5Bspring=5D See= king comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appro= priate for not-directly connect SDWAN edges to use GRE/VxLAN header bits = to indicate the desired SR path=3F

&=23160;

Sorry, I meant= to ask:

&=23160;

When the SDWAN= edge nodes are NOT directly connected to the PEs of SR domain, is it = appropriate for SDWAN edge nodes to use GRE/VxLAN header bits to indicate= the desired SR Path=3F

&=23160;

Linda

&=23160;

=46rom: spring <spring-bounces=40ietf.org> On Behalf= Of Linda Dunbar
Sent: Monday, July 08, 2019 5:11 PM
To: SPRING WG <spring=40= ietf.org>
Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-o= ver-hybrid-networks: is it appropriate for not-directly connect SDWAN edg= es to use GRE/VxLAN header bits to indicate the desired SR path=3F=

&=23160;

SD-WAN, as des= cribed by ONUG (Open Network User Group), is about pooling WAN bandwidth = from multiple service providers to get better WAN bandwidth management, v= isibility & control.

Because of the= ephemeral property of the selected Cloud DCs, an enterprise or its netwo= rk service provider may not have the direct links to the Cloud DCs that a= re optimal for hosting the enterprise=E2=80=99s specific workloads/Apps. = Under those circumstances, SD-WAN is a very flexible choice to interconne= ct the enterprise on-premises data centers & branch offices to its de= sired Cloud DCs...

However, SD-WA= N paths over public internet can have unpredictable performance, especial= ly over long distances and cross state/country boundaries. Therefore, it = is highly desirable to place as much as possible the portion of SD-WAN pa= ths over service provider VPN (e.g. enterprise=E2=80=99s existing VPN) th= at have guaranteed SLA and to minimize the distance/segments over public = internet.

&=23160;

https://datatracker.ietf= .org/doc/draft-dunbar-sr-sdwan-over-hybrid-networks/ describes a meth= od to enforce a SD-WAN path=E2=80=99s head-end selected route traversing = through a list of specific nodes of multiple network segments without req= uiring the nodes in each network segments to have the intelligence (or ma= intaining states) of selecting next hop or next segments.

&=23160;

When a SR doma= in has multiple PEs with ports facing the external networks (such as the = public internet or LTE termination), SD-WAN paths can traverse the SR dom= ain via different ingress/egress PEs resulting in different E2E performan= ce.

&=23160;

Even with the = same ingress/egress, some flows may need different segments across the SR= Domain. It is not practical, or even possible, for PEs to determine whic= h Apps=E2=80=99 flows should egress.

Segment Routin= g can be used to steer packets (or path) to traverse the explicit egress = node, or explicit segments through the SR Domain based on the SLA request= ed by the SD-WAN head-end nodes.

&=23160;

When the SDWAN= edge nodes are directly connected to the PEs of SR domain, is it appropr= iate for SDWAN edge nodes to use GRE/VxLAN header bits to indicate the de= sired SR Path=3F

&=23160;

We are looking= for feedback, criticisms, or suggestion on the the proposed approach.

&=23160;

Thank you,

Linda &=23160;=

=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F
spring mailing list
spring=40ietf.org
https://www.= ietf.org/mailman/listinfo/spring

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[98.110.251.46]) by smtp.gmail.com with ESMTPSA id u186sm34969706wmu.26.2019.07.16.20.00.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Jul 2019 20:00:26 -0700 (PDT) From: Bob Hinden Content-Type: multipart/signed; boundary="Apple-Mail=_F44C6237-D1C9-43C7-9A86-1EE95A68F06A"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: <4C892716-11EA-41D1-8062-A2DFF6D735AA@gmail.com> Date: Tue, 16 Jul 2019 23:00:23 -0400 Cc: Bob Hinden , IPv6 List To: SPRING WG X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [spring] Comments on < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jul 2019 03:00:34 -0000 --Apple-Mail=_F44C6237-D1C9-43C7-9A86-1EE95A68F06A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi, I was looking at < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> = and have a few comments. I am copying the 6MAN list because of its use = of IPv6 addresses. The draft says: uSID block: A block of uSID's It can be any IPv6 prefix allocated to the provider (e.g. /40 or /48), or it can be any block generally available for private use. An SR domain may have multiple uSID blocks. In this document we leverage FC00::/8 block reserved for private use as ULA space (RFC4193). Throughout this document we use FC00::/16 as the illustrated uSID block. ULA space allows for up to 256 uSID blocks in FC00::/8. The first sentence in the first paragraph is fine, as it is proposing = using prefixes assigned to the provider. The rest is not fine. ULA space as defined in RFC4193 is not for use like this. RFC4193 = specifies: The Local IPv6 addresses are created using a pseudo-randomly allocated global ID. They have the following format: | 7 bits |1| 40 bits | 16 bits | 64 bits | +--------+-+------------+-----------+----------------------------+ | Prefix |L| Global ID | Subnet ID | Interface ID | +--------+-+------------+-----------+----------------------------+ It is inappropriate to use the a large portion of ULA space (aka = FC00::/16) in the manner proposed by this draft. A better alternative = for a provider using SRH is to generate an /48 ULA prefix as defined in = RFC4193 and use it for this purpose. What is proposed in this document = will break ULAs for everyone else. This draft (nor any future drafts in Spring) should not be redefining = the IPv6 address space. It is also very excessive to use this much = address space to identify segments in a SRH network. How many segments = are needed to be identified? Surely not 2^^112. Regards, Bob --Apple-Mail=_F44C6237-D1C9-43C7-9A86-1EE95A68F06A Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEm0rfRsOCoyamPexGrut0EXfnu6gFAl0uj0cACgkQrut0EXfn u6huzAf/WOLIl5yl3gJIX3idsZdmJnqsQMG3aOK6MQGmaC+fVJBnuh1jf3xDgNzw z6rLzKIz16p+4xpo0zeJfnD657cwcui5eWc4sYptS+1KrISfye2HJWV6xzxeQtvG dys+b2go4XhgEW8uORLJ/PJ2uEtyQ/bhBWlvb/UJzA+e6rbj9dyGU6PFXfFpfOA1 Hzq0IRiK6vsZGNMObjELd1AblNsuTo3s/LgNEBuzsLMnG879EWKntDc+CP6rMV0B KVDzIPAS5p+GLSJHqiIujj0u65wVMt7cX3SA+pl73IWMySFsGFbDnoJN6Vki/+CH ORfmk5xrHUXP0OSnEkOJzlq5CMXmKA== =U//E -----END PGP SIGNATURE----- --Apple-Mail=_F44C6237-D1C9-43C7-9A86-1EE95A68F06A-- From nobody Tue Jul 16 20:18:32 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) 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DGGEML406-HUB.china.huawei.com (10.3.17.50) by lhreml702-cah.china.huawei.com (10.201.108.43) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 17 Jul 2019 04:18:18 +0100 Received: from DGGEML512-MBX.china.huawei.com ([169.254.2.81]) by dggeml406-hub.china.huawei.com ([10.3.17.50]) with mapi id 14.03.0439.000; Wed, 17 Jul 2019 11:18:06 +0800 From: "Pengshuping (Peng Shuping)" To: 6man WG , "spring@ietf.org" CC: Lizhenbin Thread-Topic: IETF105 APN6 Side Meeting, Thursday Moring @Notre Dame Room Thread-Index: AdU8Te1+jU2/RoO4TxyLTMKKuuE0Ow== Date: Wed, 17 Jul 2019 03:18:05 +0000 Message-ID: <4278D47A901B3041A737953BAA078ADE1484A914@dggeml512-mbx.china.huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.130.169.124] Content-Type: multipart/alternative; boundary="_000_4278D47A901B3041A737953BAA078ADE1484A914dggeml512mbxchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [spring] IETF105 APN6 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h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=lMgFs7dFKvHYOnTIJvRE2gf9lZkO/sp3TvyuRBc+gaA=; b=po03ty6uLtcngZ3F2UxcYoKyLcZfrZcroYligQehksqvsnBj65jlw0QsCP88O5aS1V 35PyL6hiEf1qkwgCKSxNXHCI0xOc3S5/MDeW01s80BDg7HLnuCY9BSZirISvOO/UkEpR MY7CEsPYVdd+HBapSFOLAzsmp46J7tdwaVbKCazRhN1hg7dXyT+NXwsERYGE/VQ1meOO UL43SoLovcGQKb0Rt2qHgzXC5dnS44vpccsshUQrA3x3xcivHQlSoqvk9LSTvhlmeC6c 2gafuT5gW2Fu3T/odV9wW7GBFgv5qBMXsl7HiW0KAglg1R7BHOCsLAoY29xWj8w4KRp9 lCJg== 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=lMgFs7dFKvHYOnTIJvRE2gf9lZkO/sp3TvyuRBc+gaA=; b=AvIzQ09R1FTt+3ZHKoOsGRS27k+nN40B++K5EGjGDZgfM5DaE55QywH+3Vvr2/DgU2 rSQFf/DAwzIA1NkfCbTxrPY4XTD70X8sDuI8/7taXL8xNZTfB14N2ckiKXjBw7mS/hpg ku1Itp4Fm7npEnVBb1X0qvCkRuzL6GZgLSeZO2a5rFd+jwDDXUlIiHnNhf2vwsd0gnmO Fd3KVQTaCUaw2uChYJrgaYwk/ChFAMdogkHEYpbJFlYKB/5H+N1y/rOtIb4Fi1MpegYJ A6ylQtCYm+fb/kIgn8/JEioUtUnJy491KVVIva2QvVY81vjfpgb4F8EiDS8FAFh50qNJ 0Egw== X-Gm-Message-State: APjAAAX02NUMjFt4zMXkNz5DiyKttR6Wx2mghUoO4JE/4zIbcTxNh1uc Q+v1d8QOCX/AdmE9NWCU1TB22w/MUPVa6utWl60= X-Google-Smtp-Source: APXvYqxHqK7FYW3uZVeaRutK9rTbuTo9KV3Pb5tXLCvaZo7HQaq0sgw37THEWn2G7UD8XtyEH5TkH02QLp3y9NoPrC0= X-Received: by 2002:a63:c44c:: with SMTP id m12mr1606572pgg.396.1563345741147; Tue, 16 Jul 2019 23:42:21 -0700 (PDT) MIME-Version: 1.0 References: <4C892716-11EA-41D1-8062-A2DFF6D735AA@gmail.com> In-Reply-To: <4C892716-11EA-41D1-8062-A2DFF6D735AA@gmail.com> From: Robert Raszuk Date: Wed, 17 Jul 2019 08:42:10 +0200 Message-ID: To: Bob Hinden Cc: SPRING WG , IPv6 List Content-Type: multipart/alternative; boundary="0000000000008ff177058ddacb87" Archived-At: Subject: Re: [spring] Comments on < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jul 2019 06:42:24 -0000 --0000000000008ff177058ddacb87 Content-Type: text/plain; charset="UTF-8" HI Bob, The way I read this document is that FC00::/8 is just an example. If IETF decided to allocate a new prefix I think no one will object that. > How many segments are needed to be identified? Surely not 2^^112. The crux of the proposal is in embedding multiple microSIDs in the *single* IPv6 address. So if we consume say 16 bits for prefix we are left with 112 bits for SIDs. Say SID would be of 16 bits so we can at most in dst address of single encapsulated packet impose 7 SIDs. Not sure where you 2 to the power of 112 comes from - there is no "SID stacking" here any more :). Cheers, R. On Wed, Jul 17, 2019 at 5:01 AM Bob Hinden wrote: > Hi, > > I was looking at < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> > and have a few comments. I am copying the 6MAN list because of its use of > IPv6 addresses. > > The draft says: > > uSID block: A block of uSID's > > It can be any IPv6 prefix allocated to the provider (e.g. /40 or > /48), or it can be any block generally available for private use. > An SR domain may have multiple uSID blocks. > > In this document we leverage FC00::/8 block reserved for private > use as ULA space (RFC4193). Throughout this document we use > FC00::/16 as the illustrated uSID block. ULA space allows for up > to 256 uSID blocks in FC00::/8. > > The first sentence in the first paragraph is fine, as it is proposing > using prefixes assigned to the provider. The rest is not fine. > > ULA space as defined in RFC4193 is not for use like this. RFC4193 > specifies: > > The Local IPv6 addresses are created using a pseudo-randomly > allocated global ID. They have the following format: > > | 7 bits |1| 40 bits | 16 bits | 64 bits | > +--------+-+------------+-----------+----------------------------+ > | Prefix |L| Global ID | Subnet ID | Interface ID | > +--------+-+------------+-----------+----------------------------+ > > It is inappropriate to use the a large portion of ULA space (aka > FC00::/16) in the manner proposed by this draft. A better alternative for > a provider using SRH is to generate an /48 ULA prefix as defined in RFC4193 > and use it for this purpose. What is proposed in this document will break > ULAs for everyone else. > > This draft (nor any future drafts in Spring) should not be redefining the > IPv6 address space. It is also very excessive to use this much address > space to identify segments in a SRH network. How many segments are needed > to be identified? Surely not 2^^112. > > Regards, > Bob > > > > > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --0000000000008ff177058ddacb87 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
HI Bob,

The way I read this document is that FC00::/8 is just= an example. If IETF decided to allocate a new prefix I think no one will o= bject that.=C2=A0

> How many segments a= re needed to be identified?=C2=A0 Surely not 2^^112.=C2=A0=C2=A0
=

The crux of the propo= sal is in embedding multiple microSIDs in the *single* IPv6 address. So if = we consume say 16 bits for prefix we are left with 112 bits for SIDs.=C2=A0=

Say SID would be of 1= 6 bits so we can at most in dst address of single encapsulated packet impos= e 7 SIDs. Not sure where you 2 to the power of 112 comes from - there is no= "SID stacking" here any more :).=C2=A0
<= br>
Cheers,
R.

On = Wed, Jul 17, 2019 at 5:01 AM Bob Hinden <bob.hinden@gmail.com> wrote:
Hi,

I was looking at < draft-filsfils-spring-net-pgm-extension-srv6-usid-00&= gt; and have a few comments.=C2=A0 I am copying the 6MAN list because of it= s use of IPv6 addresses.

The draft says:

=C2=A0 =C2=A0uSID block: A block of uSID's

=C2=A0 =C2=A0 =C2=A0 It can be any IPv6 prefix allocated to the provider (e= .g. /40 or
=C2=A0 =C2=A0 =C2=A0 /48), or it can be any block generally available for p= rivate use.
=C2=A0 =C2=A0 =C2=A0 An SR domain may have multiple uSID blocks.

=C2=A0 =C2=A0 =C2=A0 In this document we leverage FC00::/8 block reserved f= or private
=C2=A0 =C2=A0 =C2=A0 use as ULA space (RFC4193).=C2=A0 Throughout this docu= ment we use
=C2=A0 =C2=A0 =C2=A0 FC00::/16 as the illustrated uSID block.=C2=A0 ULA spa= ce allows for up
=C2=A0 =C2=A0 =C2=A0 to 256 uSID blocks in FC00::/8.

The first sentence in the first paragraph is fine, as it is proposing using= prefixes assigned to the provider.=C2=A0 =C2=A0The rest is not fine.

ULA space as defined in RFC4193 is not for use like this.=C2=A0 =C2=A0RFC41= 93 specifies:

=C2=A0 =C2=A0The Local IPv6 addresses are created using a pseudo-randomly =C2=A0 =C2=A0allocated global ID.=C2=A0 They have the following format:

=C2=A0 =C2=A0 =C2=A0 | 7 bits |1|=C2=A0 40 bits=C2=A0 =C2=A0|=C2=A0 16 bits= =C2=A0 |=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 64 bits=C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0|
=C2=A0 =C2=A0 =C2=A0 +--------+-+------------+-----------+-----------------= -----------+
=C2=A0 =C2=A0 =C2=A0 | Prefix |L| Global ID=C2=A0 | Subnet ID |=C2=A0 =C2= =A0 =C2=A0 =C2=A0 Interface ID=C2=A0 =C2=A0 =C2=A0 =C2=A0 |
=C2=A0 =C2=A0 =C2=A0 +--------+-+------------+-----------+-----------------= -----------+

It is inappropriate to use the a large portion of ULA space (aka FC00::/16)= in the manner proposed by this draft.=C2=A0 =C2=A0A better alternative for= a provider using SRH is to generate an /48 ULA prefix as defined in RFC419= 3 and use it for this purpose.=C2=A0 What is proposed in this document will= break ULAs for everyone else.

This draft (nor any future drafts in Spring) should not be redefining the I= Pv6 address space.=C2=A0 =C2=A0It is also very excessive to use this much a= ddress space to identify segments in a SRH network.=C2=A0 =C2=A0How many se= gments are needed to be identified?=C2=A0 Surely not 2^^112.

Regards,
Bob





_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
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[98.110.251.46]) by smtp.gmail.com with ESMTPSA id b19sm17792006wmj.13.2019.07.17.05.27.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 17 Jul 2019 05:27:14 -0700 (PDT) From: Bob Hinden Message-Id: <46C78D76-C8E7-4A6C-B27B-01BB5C91542D@gmail.com> Content-Type: multipart/signed; boundary="Apple-Mail=_F1D03619-1D83-44B5-A617-CE9D4DDF16CB"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Wed, 17 Jul 2019 08:27:09 -0400 In-Reply-To: Cc: Bob Hinden , SPRING WG , IPv6 List To: Robert Raszuk References: <4C892716-11EA-41D1-8062-A2DFF6D735AA@gmail.com> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Comments on < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jul 2019 12:27:20 -0000 --Apple-Mail=_F1D03619-1D83-44B5-A617-CE9D4DDF16CB Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Robert, > On Jul 17, 2019, at 2:42 AM, Robert Raszuk wrote: >=20 > HI Bob, >=20 > The way I read this document is that FC00::/8 is just an example. If = IETF decided to allocate a new prefix I think no one will object that. I don=E2=80=99t think IETF specs should cite examples that are not = consistent with other standards, in this case RFC4193. But it=E2=80=99s = more than a suggestion, it says: In this document we leverage FC00::/8 block reserved for private use as ULA space (RFC4193) >=20 > > How many segments are needed to be identified? Surely not 2^^112. >=20 > The crux of the proposal is in embedding multiple microSIDs in the = *single* IPv6 address. So if we consume say 16 bits for prefix we are = left with 112 bits for SIDs. >=20 > Say SID would be of 16 bits so we can at most in dst address of single = encapsulated packet impose 7 SIDs. Not sure where you 2 to the power of = 112 comes from - there is no "SID stacking" here any more :). I got 2^^112 by the spec was proposing a /16 prefix, that leaves 112 = bits for addresses in that prefix. Hence 2^^112. I wouldn=E2=80=99t consider these to be an IPv6 address. RFC4291 says: Except for the knowledge of the subnet boundary discussed in the previous paragraphs, nodes should not make any assumptions about the structure of an IPv6 address. This appears to go well beyond that. Bob >=20 > Cheers, > R. >=20 > On Wed, Jul 17, 2019 at 5:01 AM Bob Hinden = wrote: > Hi, >=20 > I was looking at < = draft-filsfils-spring-net-pgm-extension-srv6-usid-00> and have a few = comments. I am copying the 6MAN list because of its use of IPv6 = addresses. >=20 > The draft says: >=20 > uSID block: A block of uSID's >=20 > It can be any IPv6 prefix allocated to the provider (e.g. /40 or > /48), or it can be any block generally available for private = use. > An SR domain may have multiple uSID blocks. >=20 > In this document we leverage FC00::/8 block reserved for private > use as ULA space (RFC4193). Throughout this document we use > FC00::/16 as the illustrated uSID block. ULA space allows for = up > to 256 uSID blocks in FC00::/8. >=20 > The first sentence in the first paragraph is fine, as it is proposing = using prefixes assigned to the provider. The rest is not fine. >=20 > ULA space as defined in RFC4193 is not for use like this. RFC4193 = specifies: >=20 > The Local IPv6 addresses are created using a pseudo-randomly > allocated global ID. They have the following format: >=20 > | 7 bits |1| 40 bits | 16 bits | 64 bits = | > = +--------+-+------------+-----------+----------------------------+ > | Prefix |L| Global ID | Subnet ID | Interface ID = | > = +--------+-+------------+-----------+----------------------------+ >=20 > It is inappropriate to use the a large portion of ULA space (aka = FC00::/16) in the manner proposed by this draft. A better alternative = for a provider using SRH is to generate an /48 ULA prefix as defined in = RFC4193 and use it for this purpose. What is proposed in this document = will break ULAs for everyone else. >=20 > This draft (nor any future drafts in Spring) should not be redefining = the IPv6 address space. It is also very excessive to use this much = address space to identify segments in a SRH network. How many segments = are needed to be identified? Surely not 2^^112. >=20 > Regards, > Bob >=20 >=20 >=20 >=20 >=20 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring --Apple-Mail=_F1D03619-1D83-44B5-A617-CE9D4DDF16CB Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEm0rfRsOCoyamPexGrut0EXfnu6gFAl0vFB0ACgkQrut0EXfn u6gMnQf+LHclvx8CygNVl0JvAX/bEVGjky/Tyl8CvHjIxZ1jAnjjBhZ64Cv8ctvH tymLL4lNcMGXApUDvW5Trh+8UJqqITUQaMKH5Wv3TJqMpjWLzIlF/YKkvVQHgdP7 N3dg/QJDNKoozEv8bBf4Gx982knt7F2ChTxWgbVvy2/E44ORleCSIaAEzbrLUG7P TIcxEvJjw0+z+nhhXsHtwGgjYcFX/U8JhsN3+Bti+YtAkZVYYMlOnQCLLidZWc7g 1tSXsVAOswd45ovC5WBvflKmZWYHdwrqClr/xSXk9Y3/hPnkLdB4uutE8Rdgia5K L6ROMbRtubWCUR4Kc3prsvsoMwKQSg== =AeSq -----END PGP SIGNATURE----- --Apple-Mail=_F1D03619-1D83-44B5-A617-CE9D4DDF16CB-- From nobody Wed Jul 17 05:28:04 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A40E512068D; Wed, 17 Jul 2019 05:27:57 -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, 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 mdGNS1srkYPF; Wed, 17 Jul 2019 05:27:56 -0700 (PDT) Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) (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 AAD1A1200A3; Wed, 17 Jul 2019 05:27:55 -0700 (PDT) Received: by mail-wm1-x333.google.com with SMTP id v15so21992364wml.0; Wed, 17 Jul 2019 05:27:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=eWwPc50/zjpqriUqDq35pBsGw0TXHeLmOCrvlsx05Gs=; b=jAqNbPKNdivuiFxJkLnN7o8IuXFyFcXyIdfOhcMwhFsjFS57FoKqxLDhWzBI21+pKH ySNabTG84IJwWYEEctXiknbCqM9M3nsMTS2386R/BNxHTcso6TbfOZCLN6o1eDFsRA1V dp5QiQbsRICXZSmluQ7EyRvVecNcucu8D6q6pE3qAxz4vAynD2eQoO0up8sztEag0n4N pduuNoDfIWKMU0k61v0iGKkEgt0BKUKeppGG3Nz2wU8hMXi6xWsdBq7OnNleIreJlIBA rL38CECHnLuyu5kUJrXy4UN9VnE8/JGcgVnTF46NcB78j+6Cms5WQcQ5AhlWPTXtDeGp BCHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=eWwPc50/zjpqriUqDq35pBsGw0TXHeLmOCrvlsx05Gs=; b=lrAuF5B8/mlwXrStT4H3iUUK90FLLaGpgTiBWbcIId97w57RGnPA1O8H371ozHrnu5 0iEu1Ul1cY4dmjd55Cj8MwKyT25Ual9HYoZogV4E9mXtgdNEyoAeGAatXLtdCgOMM4gK nJpk1I1+rP0Tbb1SBsc+hI9ls9hwTgTdObaZEQPj+ZIS4GRUis7+S7kJdt9WmTPoCArR bxhHxGmwbW/6T9vuRQWpUrpZqEZbqYBuZwnimAoM44XcvWs6ZJy3U8y1XEuyDBsRysRP WXiaUIh4nYysQjIvvYW2vBLterJ8DEMjxvaU+1NODuvNenqyg1Gc3rso5/ZnyiB86W8V QzZA== X-Gm-Message-State: APjAAAXxrY87gQ50N5N8N8plyBXHAEQV90w+0TvQnVt20hjL5MFqx41h l3+BfXgmepm9BuC/kt+r6/I= X-Google-Smtp-Source: APXvYqwFZ31P5ctJa8Erwp0M2ZhTFe3oYlZMndhOrzsKACz3PRN0/1/HQJC5kTFKFAJFPSl7jTMmwA== X-Received: by 2002:a1c:6686:: with SMTP id a128mr36521251wmc.149.1563366474286; Wed, 17 Jul 2019 05:27:54 -0700 (PDT) Received: from [192.168.1.19] (pool-98-110-251-46.bstnma.fios.verizon.net. [98.110.251.46]) by smtp.gmail.com with ESMTPSA id b19sm17792006wmj.13.2019.07.17.05.27.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 17 Jul 2019 05:27:53 -0700 (PDT) From: Bob Hinden Message-Id: <60BD1917-CCB8-453D-B588-612E3C15AA66@gmail.com> Content-Type: multipart/signed; boundary="Apple-Mail=_2DE1C301-A426-44BD-9744-DD82E3152208"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Wed, 17 Jul 2019 08:27:52 -0400 In-Reply-To: Cc: Bob Hinden , SPRING WG , IPv6 List To: "Pablo Camarillo (pcamaril)" References: <4C892716-11EA-41D1-8062-A2DFF6D735AA@gmail.com> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Comments on < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jul 2019 12:28:03 -0000 --Apple-Mail=_2DE1C301-A426-44BD-9744-DD82E3152208 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Pablo, > On Jul 17, 2019, at 4:49 AM, Pablo Camarillo (pcamaril) = wrote: >=20 > Hi Bob, >=20 > Let's indeed simplify the discussion and use a prefix assigned to the = provider. > We will submit a rev1 accordingly on Monday. I think that would be better. Thanks, Bob >=20 > Thanks, > Pablo >=20 > =EF=BB=BF-----Original Message----- > From: spring on behalf of Bob Hinden = > Date: Wednesday, 17 July 2019 at 05:01 > To: SPRING WG > Cc: IPv6 List , Bob Hinden > Subject: [spring] Comments on < = draft-filsfils-spring-net-pgm-extension-srv6-usid-00> >=20 > The first sentence in the first paragraph is fine, as it is = proposing using prefixes assigned to the provider. >=20 --Apple-Mail=_2DE1C301-A426-44BD-9744-DD82E3152208 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEm0rfRsOCoyamPexGrut0EXfnu6gFAl0vFEgACgkQrut0EXfn u6gtfwgAs4hRyCNPIGfY2RPxpPtqrj2opYqc7YQCgmCzUt/IufCkvh7MbkupuNms e/n+i170Vc5mfo6JrvaY7B6zo+7z9ta+O7gO/MvCfhPjo4DJN6A7aBckcfQvZgaG Eo1W+MfFhAGNuSeCVBjuF97cpH11WbaGLyyhMmRTEVgyxyn8D8r3A2aZ2bC9DeIN DJ7c1Ih1vOJazKFoQDtm8VGF4qgl4jiUUC7WNTvK/ufoPkriDq2uGvqNy/WT5kiR WkYNwEFD/0MQbQp0gC6L91ooo1DorUE2i8XjKwjCPHsdeDME+CkbRancUbXCBXCI AVXMrCSuWBZSEfUBWjDEyuEyIZC+sw== =jFW/ -----END PGP SIGNATURE----- --Apple-Mail=_2DE1C301-A426-44BD-9744-DD82E3152208-- From nobody Thu Jul 18 09:16:19 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DCEC7120872; Thu, 18 Jul 2019 09:16:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, HTTPS_HTTP_MISMATCH=0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=futurewei.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 88X29YhdFXi3; Thu, 18 Jul 2019 09:16:05 -0700 (PDT) Received: from NAM02-BL2-obe.outbound.protection.outlook.com (mail-bl2nam02on072e.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe46::72e]) (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 6C5B5120887; Thu, 18 Jul 2019 09:16:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=AebAScaxQuFQLIarIW79r1a3x1EnJqfN06qAMGF85R2Tfp81RlyYLZlcUFG9cJQfNyvVOC58SMjBgARD3tP6n5dRxV1Yz7kJH+d/dGVhb5PiqETNUCUSNdKH5Cnm2+t1K0pKF/DHw0XQVm8DyHkjK8LkyF8BXHz1p7d98mrjVost8ZaMzMTkMxxN9WqXHUkmfFq60NFqqWm2iPvzuNDyzuE7obv7NRsbsbST5l+bmta37oiwkOYJJfPLbJvYeDQQRwwtD674oA97psig56xho5wUKHQOCr8qBVoq633r/VsvAtWu3WGAGM2eR8z4sUql+fbMASKLAPkfzib7s2YYAA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AaNojbOLMduBF8wS+YHPCh2sgTsxaQ+nwliEgY1JQMY=; b=a+VirweRyoHzOE1Nxbj5foYLbOT89m/UgISalEO06XFTja58wlYMtzE5S3SouhpyZEpFTpKpTSxcg+0Q7jUl6ihoNLbPTlncEKy/UbcnCz/107gNq9cgPP1xJTEsnGJBX1OlTGaxjg9PIvGFxr4k+Z/J8fu/rZz+wQSHHOlXhqOJtZsLDyDzO8yMQLuoqol57AwJdR/v7xZ9CXJHxCP1UpyhRdOsCtb3FuISSkdcH0Lc9jW/BLg1nKPNt+SyLCLsVqwTCF6Nu++elrI3zMni5vwLP81fd44E4tG+odncmWYCcT5LjrUYCi+wftlDRRrVjKt+LMJJ/HZmFzl7iKAyHA== ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=futurewei.com;dmarc=pass action=none header.from=futurewei.com;dkim=pass header.d=futurewei.com;arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Futurewei.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AaNojbOLMduBF8wS+YHPCh2sgTsxaQ+nwliEgY1JQMY=; b=CEGIWOy7qIyEqXJE1avrbFaf3E9VvQkkgj/LbymGfuvIb6//IkO4mSzi3icMk2319XIcTYxsHnPGFpab167yYtaWMIEjCvBID0PvPvxv+St1l8k4Q1IdW4/1sU5FzulvbVnTAzpmlg4j2iGWHP3SkURxZOJv6yWXk5bOCuebDvI= Received: from MN2PR13MB3582.namprd13.prod.outlook.com (10.255.238.139) by MN2PR13MB3215.namprd13.prod.outlook.com (20.179.151.13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2094.10; Thu, 18 Jul 2019 16:16:03 +0000 Received: from MN2PR13MB3582.namprd13.prod.outlook.com ([fe80::e068:8461:62d7:e0c1]) by MN2PR13MB3582.namprd13.prod.outlook.com ([fe80::e068:8461:62d7:e0c1%7]) with mapi id 15.20.2094.009; Thu, 18 Jul 2019 16:16:03 +0000 From: Linda Dunbar To: Jeff Tantsura , spring , SPRING WG , =?utf-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= Thread-Topic: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? 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"=?utf-8?Q?=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)?=" , Linda Dunbar Message-ID: In-Reply-To: References: <53f3a00b-2dc1-4762-99c3-de7f57b592d2@Spark> X-Readdle-Message-ID: b64d9d05-b2c9-42d6-896b-02e3411ad0c3@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d30c7a6_3deb451a_c7f7" Archived-At: Subject: Re: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Jul 2019 19:25:33 -0000 --5d30c7a6_3deb451a_c7f7 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Linda, In context of=C2=A0draft-ietf-mpls-sr-over-ip it would be IP->SRinUDP->SR= -native-> SRinUDP->IP Cheers, Jeff On Jul 18, 2019, 9:16 AM -0700, Linda Dunbar , wrote: > Jeff, > > =46or SDWAN case, the Source node and Destination nodes (a.k.a. SDWAN e= dge nodes) are IP based. > > So it should be reversed, IP segments -> SR segments which include both= SRv6 & MPLS-SR -> IP segments > > Linda > > =46rom: Jeff Tantsura > Sent: Monday, July 15, 2019 5:48 PM > To: spring ; SPRING WG ; = =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) ; Linda Dunbar > Subject: RE: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-ov= er-hybrid-networks: is it appropriate for not-directly connect SDWAN edge= s to use GRE/VxLAN header bits to indicate the desired SR path=3F > > Linda, > > What you want is to use native MPLS when available and encapsulate MPLS= packets in IP/UDP when you need to travers IP, you destination in the im= posed IP header would be that of the next SR capable device as described = in draft-ietf-mpls-sr-over-ip. > > Cheers, > Jeff > On Jul 15, 2019, 3:24 PM -0700, Linda Dunbar , wrote: > > > > > Jeff, > > > > The draft-ietf-mpls-sr-over-ip only has MPLS packets being tunneled b= y IP, but not reversed (IP packets tunneled over MPLS). > > > > Do you think it worthwhile to add some similar sections (of course wi= th different content), such as =46orwarding entry Construction, forwardin= g procedures as in draft-ietf-mpls-sr-over-ip=3F > > > > Linda > > > > =46rom: Jeff Tantsura > > Sent: Tuesday, July 09, 2019 4:03 PM > > To: spring ; Linda Dunbar ; SPRING WG ; =E5=BE=90=E5=B0=8F=E8=99=8E= (=E4=B9=89=E5=85=88) > > Subject: Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-= over-hybrid-networks: is it appropriate for not-directly connect SDWAN ed= ges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > +1 > > > > take a look at=C2=A0draft-ietf-mpls-sr-over-ip > > > > Cheers, > > Jeff > > On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89= =E5=85=88) , wrote: > > > Hi Linda, > > > > > > Why not directly use the MPLSoUDP encapsulation to carry the B-SID = label=C2=A0so as to indicate the preferred path=3F =46or more details, pl= ease read=C2=A0https://tools.ietf.org/html/draft-dukes-spring-sr-for-sdwa= n-02=23section-7.3 > > > > > > Best regards, > > > Xiaohu > > > > > > > -----------------------------------------------------------------= - > > > > =46rom:Linda Dunbar > > > > Send Time:2019=E5=B9=B47=E6=9C=889=E6=97=A5(=E6=98=9F=E6=9C=9F=E4= =BA=8C) 06:26 > > > > To:Linda Dunbar ; SPRING WG > > > > Subject:Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > > > Sorry, I meant to ask: > > > > > > > > When the SDWAN edge nodes are NOT directly connected to the PEs o= f SR domain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN head= er bits to indicate the desired SR Path=3F > > > > > > > > Linda > > > > > > > > =46rom: spring On Behalf Of Linda Dun= bar > > > > Sent: Monday, July 08, 2019 5:11 PM > > > > To: SPRING WG > > > > Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-= over-hybrid-networks: is it appropriate for not-directly connect SDWAN ed= ges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > > > SD-WAN, as described by ONUG (Open Network User Group), is about = pooling WAN bandwidth from multiple service providers to get better WAN b= andwidth management, visibility & control. > > > > Because of the ephemeral property of the selected Cloud DCs, an e= nterprise or its network service provider may not have the direct links t= o the Cloud DCs that are optimal for hosting the enterprise=E2=80=99s spe= cific workloads/Apps. Under those circumstances, SD-WAN is a very flexibl= e choice to interconnect the enterprise on-premises data centers & branch= offices to its desired Cloud DCs... > > > > However, SD-WAN paths over public internet can have unpredictable= performance, especially over long distances and cross state/country boun= daries. Therefore, it is highly desirable to place as much as possible th= e portion of SD-WAN paths over service provider VPN (e.g. enterprise=E2=80= =99s existing VPN) that have guaranteed SLA and to minimize the distance/= segments over public internet. > > > > > > > > https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-hybri= d-networks/ describes a method to enforce a SD-WAN path=E2=80=99s head-en= d selected route traversing through a list of specific nodes of multiple = network segments without requiring the nodes in each network segments to = have the intelligence (or maintaining states) of selecting next hop or ne= xt segments. > > > > > > > > When a SR domain has multiple PEs with ports facing the external = networks (such as the public internet or LTE termination), SD-WAN paths c= an traverse the SR domain via different ingress/egress PEs resulting in d= ifferent E2E performance. > > > > > > > > Even with the same ingress/egress, some flows may need different = segments across the SR Domain. It is not practical, or even possible, for= PEs to determine which Apps=E2=80=99 flows should egress. > > > > Segment Routing can be used to steer packets (or path) to travers= e the explicit egress node, or explicit segments through the SR Domain ba= sed on the SLA requested by the SD-WAN head-end nodes. > > > > > > > > When the SDWAN edge nodes are directly connected to the PEs of SR= domain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header b= its to indicate the desired SR Path=3F > > > > > > > > We are looking for feedback, criticisms, or suggestion on the the= proposed approach. > > > > > > > > Thank you, > > > > Linda > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > > > spring mailing list > > > spring=40ietf.org > > > https://www.ietf.org/mailman/listinfo/spring --5d30c7a6_3deb451a_c7f7 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Linda,

In context of&=23160;draft-ietf-mpls-sr-over-ip it = would be IP->SRinUDP->SR-native-> SRinUDP->IP

Cheers,
Jeff
On Jul 18, 2019, 9:16 AM -0700, Lin= da Dunbar <linda.dunbar=40futurewei.com>, wrote:

Jeff,

&=23160;

=46or SDWAN case, the Source node and Destinat= ion nodes (a.k.a. SDWAN edge nodes) are IP based.

&=23160;

So it should be reversed, IP segments -> SR= segments which include both SRv6 & MPLS-SR -> IP segments

&=23160;

Linda

&=23160;

=46rom: Jeff Tantsura <jefftant.ietf= =40gmail.com>
Sent: Monday, July 15, 2019 5:48 PM
To: spring <spring-bounces=40ietf.org>; SPRING WG <spring= =40ietf.org>; =E5=BE=90=E5=B0=8F= =E8=99=8E(=E4=B9=89=E5=85=88= ) <xiaohu.xxh=40alibaba-inc.com>; Linda Dunbar <linda.dun= bar=40futurewei.com>
Subject: RE: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

Linda,

&=23160;

What you want is to use native MPLS when avail= able and encapsulate MPLS packets in IP/UDP when you need to travers IP, = you destination in the imposed IP header would be that of the next SR cap= able device as described in draft-ietf-mpls-sr-over-ip.

&=23160;

Cheers,

Jeff

On Jul 15, 2019, 3:24 PM -0700, Linda Dunbar &= lt;linda.dunbar=40fut= urewei.com>, wrote:

&=23160;

Jeff,

&=23160;

The draft-ietf-mpls-sr-over-ip only has MPLS packets b= eing tunneled by IP, but not reversed (IP packets tunneled over MPLS).

&=23160;

Do you think it worthwhile to add some similar section= s (of course with different content), such as =46orwarding entry Construc= tion, forwarding procedures as in draft-ietf-mpls-sr-over-ip=3F

&=23160;

Linda

&=23160;

=46rom: Jeff Tantsura <jefftant.ietf=40gmail.com>
Sent: Tuesday, July 09, 2019 4:03 PM
To: spring <sp= ring-bounces=40ietf.org>; Linda Dunbar <linda.dunbar=40futurewei.com>; SPRING= WG <spring=40ietf.org>= ;; =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &= lt;xiaohu.xxh=40aliba= ba-inc.com>
Subject: Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

+1

&=23160;

take a look at&=23160;draft-ietf-mpls-sr-over-ip

&=23160;

Cheers,

Jeff

On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh=40alibaba-inc.com>, wrote:

Hi Linda,

&=23160;

Why not directly use the MPLSoUDP en= capsulation to carry the B-SID label&=23160;so as to indicate the preferr= ed path=3F =46or more details, please read&=23160;https://tools.ietf.org/html/draft= -dukes-spring-sr-for-sdwan-02=23section-7.3&=23160;

&=23160;

Best regards,

Xiaohu

&=23160;

------------------------------------= ------------------------------

=46rom:Linda Dunbar <linda.dunbar=40futurewei.com&g= t;

Send Time:2019=E5=B9=B4<= span style=3D=22font-size:10.5pt;font-family:"Tahoma",sans-seri= f;color:black=22>7=E6=9C=889=E6=97=A5= (=E6=98=9F=E6=9C=9F=E4=BA=8C) 06:26

To:Linda Dunbar <linda.dunbar=40futurewei.com>;= SPRING WG <spring=40ietf.org= >

Subject:Re: =5Bspring=5D Seeking com= ments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate f= or not-directly connect SDWAN edges to use GRE/VxLAN header bits to indic= ate the desired SR path=3F

&=23160;

Sorry, I meant to ask:=

&=23160;

When the SDWAN edge no= des are NOT directly connected to the PEs of SR domain, is it appropri= ate for SDWAN edge nodes to use GRE/VxLAN header bits to indicate the des= ired SR Path=3F

&=23160;

Linda

&=23160;

=46rom: = spring <spring-bounces=40ietf.org> On Behalf Of = Linda Dunbar
Sent: Monday, July 08, 2019 5:11 PM
To: SPRING WG <spring=40= ietf.org>
Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-o= ver-hybrid-networks: is it appropriate for not-directly connect SDWAN edg= es to use GRE/VxLAN header bits to indicate the desired SR path=3F=

&=23160;

SD-WAN, as described b= y ONUG (Open Network User Group), is about pooling WAN bandwidth from mul= tiple service providers to get better WAN bandwidth management, visibilit= y & control.

Because of the ephemer= al property of the selected Cloud DCs, an enterprise or its network servi= ce provider may not have the direct links to the Cloud DCs that are optim= al for hosting the enterprise=E2=80=99s specific workloads/Apps. Under th= ose circumstances, SD-WAN is a very flexible choice to interconnect the e= nterprise on-premises data centers & branch offices to its desired Cl= oud DCs...

However, SD-WAN paths = over public internet can have unpredictable performance, especially over = long distances and cross state/country boundaries. Therefore, it is highl= y desirable to place as much as possible the portion of SD-WAN paths over= service provider VPN (e.g. enterprise=E2=80=99s existing VPN) that have = guaranteed SLA and to minimize the distance/segments over public internet= .

&=23160;

https://datatracker.ietf.org/doc= /draft-dunbar-sr-sdwan-over-hybrid-networks/ describes a method to en= force a SD-WAN path=E2=80=99s head-end selected route traversing through = a list of specific nodes of multiple network segments without requiring t= he nodes in each network segments to have the intelligence (or maintainin= g states) of selecting next hop or next segments.

&=23160;

When a SR domain has m= ultiple PEs with ports facing the external networks (such as the public i= nternet or LTE termination), SD-WAN paths can traverse the SR domain via = different ingress/egress PEs resulting in different E2E performance.

&=23160;

Even with the same ing= ress/egress, some flows may need different segments across the SR Domain.= It is not practical, or even possible, for PEs to determine which Apps=E2= =80=99 flows should egress.

Segment Routing can be= used to steer packets (or path) to traverse the explicit egress node, or= explicit segments through the SR Domain based on the SLA requested by th= e SD-WAN head-end nodes.

&=23160;

When the SDWAN edge no= des are directly connected to the PEs of SR domain, is it appropriate for= SDWAN edge nodes to use GRE/VxLAN header bits to indicate the desired SR= Path=3F

&=23160;

We are looking for fee= dback, criticisms, or suggestion on the the proposed approach.

=

&=23160;

Thank you,

Linda &=23160;<= /p>

=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F
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--_000_MN2PR13MB35824AE83868CE440CCC9F5B85CB0MN2PR13MB3582namp_-- From nobody Thu Jul 18 19:00:52 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ED6401200F6; Thu, 18 Jul 2019 19:00:42 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uo0XSvGTlmm4; Thu, 18 Jul 2019 19:00:39 -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 63CC412004E; 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NKGEML413-HUB.china.huawei.com ([10.98.56.74]) with mapi id 14.03.0439.000; Fri, 19 Jul 2019 10:00:19 +0800 From: Xiejingrong To: "Zafar Ali (zali)" , "6man@ietf.org" <6man@ietf.org> CC: "spring@ietf.org" Thread-Topic: Comments on Thread-Index: AdU2xs33SCKIecO8RGu9mVAXzXvUpgFUQ4GAAG8qxR0= Date: Fri, 19 Jul 2019 02:00:19 +0000 Message-ID: <16253F7987E4F346823E305D08F9115AAB8F333D@nkgeml514-mbs.china.huawei.com> References: <16253F7987E4F346823E305D08F9115AAB8DC856@nkgeml514-mbx.china.huawei.com>, In-Reply-To: Accept-Language: en-US, zh-CN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.124.182.220] Content-Type: multipart/alternative; boundary="_000_16253F7987E4F346823E305D08F9115AAB8F333Dnkgeml514mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [spring] Comments on X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Jul 2019 02:00:43 -0000 --_000_16253F7987E4F346823E305D08F9115AAB8F333Dnkgeml514mbschi_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi, Please see my comments inline below: ________________________________ From: Zafar Ali (zali) [zali@cisco.com] Sent: Wednesday, July 17, 2019 8:48 To: Xiejingrong; 6man@ietf.org Cc: Zafar Ali (zali); spring@ietf.org Subject: Re: Comments on Hi Xiejingrong, Many thanks for your comments. Greatly appreciated. First off, let=92s take the example in section 4.2.2.2 of the draft. Let=92s also modify the example using END.DT4 SID in your example. I.e., user user wants to traceroute to a remote SID function B:5:DT4, via <= B:2:C31, B:4:C52> from node N1 using O-bit. In this case, Node N1 initiates a traceroute probe with SRH as follows (A:1::, B:2:C31)(B:5:DT4, B:4:C52, B:2:C31; HC=3D64, SL=3D2, Flags.O=3D1; NH=3DUDP)(Traceroute Probe). When O-bit is processed at node 2, we the existing pseudo code works fine. When O-bit is processed at node 4, we the existing pseudo code works fine. The pseudo code for O-bit processing at node 5 needs a fix =96 please see [= ZA] in-line for the suggested change to address your comment. We can make the change to address your comment during the IETF week. [XJR] This example works for me after the following change about repeated I= CMP messages. [XJR] But still there is a problem not solved, see below marked with [XJR07= 19]: Thanks Regards =85 Zafar From: ipv6 on behalf of Xiejingrong Date: Tuesday, July 9, 2019 at 10:34 PM To: "6man@ietf.org" <6man@ietf.org> Subject: Comments on Hi, I have a few comments on : 3.1.1. O-flag Processing Implementation of the O-flag is OPTIONAL. A node MAY ignore SRH.Flags.O-flag. It is also possible that a node is capable of supporting the O-bit but based on a local decision it MAY ignore it during processing on some local SIDs. If a node does not support the O-flag, then upon reception it simply ignores it. If a node supports the O-flag, it can optionally advertise its potential via node capability advertisement in IGP [I-D.ietf-isis-srv6- extensions] and BGP-LS [I-D.ietf-idr-bgpls-srv6-ext]. The SRH.Flags.O-flag implements the "punt a timestamped copy and forward" behavior. When N receives a packet whose IPv6 DA is S and S is a local SID, N executes the following pseudo-code, before the execution of the local SID S. 1. IF SRH.Flags.O-flag is one and local configuration permits THEN a. Make a copy of the packet. b. Send the copied packet, along with an accurate timestamp to the OAM process. ;; Ref1, [ZA] Add Ref2 Ref1: An implementation SHOULD copy and record the timestamp as soon a= s possible during packet processing. Timestamp is not carried in the pac= ket forwarded to the next hop. [ZA] Ref2: An implementation should not generate further ICMP error during = local SID S processing. If local SID S processing requires generation of an= ICMP error, the error is generated by the local OAM process. [XJR] O-flag is OPTIONAL while the process is the first, I don=92t think it= is optimized. I don't even believe the process is clear until the whole process is put to= gether. I try this for the End.DT4 function (1a to 3a is added as above): 1a. IF NH=3DSRH AND SRH.Flags.O-flag is one and local configuration permi= ts THEN 2a. a. Make a copy of the packet. 3a. b. Send the copied packet, along with an accurate timestamp to the= OAM process. ;; Ref1 1. IF NH=3DSRH and SL > 0 2. drop the packet ;; Ref1 3. ELSE IF ENH =3D 4 ;; Ref2 4. pop the (outer) IPv6 header and its extension headers 5. lookup the exposed inner IPv4 DA in IPv4 table T 6. forward via the matched table entry 7. ELSE 8. Send an ICMP parameter problem message ;; Ref3 9. drop the packet Then a packet (NH=3DSRH, SL=3D0, ENH=3DICMPv6) will go to 2a/3= a and 8/9, means that two ICMP will be send to CPU. Right ? Besides, the Step 1 to 9 should be more optimized, other than deep check of= SRH.Flags.O-flag at the beginning. [ZA] The pseudo code does not restrict an implementation to optimize O-bit = processing, as necessary, to get the same behavior. 4.1.2. Pinging a SID Function The classic ping described in the previous section cannot be used to ping a remote SID function, as explained using an example in the following. Consider the case where the user wants to ping the remote SID function B:4:C52, via B:2:C31, from node N1. Node N1 constructs the ping packet (A:1::, B:2:C31)(B:4:C52, B:2:C31, SL=3D1; NH=3DICMPv6)(ICMPv6 Echo Request).. The ping fails because the node N4 receives the ICMPv6 echo request with DA set to B:4:C52 but the next header is ICMPv6, instead of SRH. To solve this problem, the initiator needs to mark the ICMPv6 echo request as an OAM packet. [XJR] Who produce the problem then ? Seems like it is the SID itself drop t= he ICMPv6 packet. I guess it is easy for an SID to support sending the ICMPv6 packet to CPU, = and support pinging this SID just the same as pinging a classic IPv6 addres= s. Is it ? I try this for the End.DT4 function (add 7A and 8A): 1. IF NH=3DSRH and SL > 0 2. drop the packet ;; Ref1 3. ELSE IF ENH =3D 4 ;; Ref2 4. pop the (outer) IPv6 header and its extension headers 5. lookup the exposed inner IPv4 DA in IPv4 table T 6. forward via the matched table entry 7A. ELSE IF ENH =3D 58 8A. Send the packet to CPU 7. ELSE 8. Send an ICMP parameter problem message ;; Ref3 9. drop the packet Isn=92t this simpler than adding a new End.OTP SID ? The normal use of End.DT4 doesn=92t require an SRH header, while the pingin= g of the End.DT4 need to add an SRH with an End.OTP and the End.DT4. That l= ooks strange to me. [ZA] The issue is that an implementation may not send ICMP error. [XJR0719] There is hint in the draft tha= t an SID may receive ICMP error: 7.2. SEC-2 An SRv6 router MUST support an ACL with the following behavior: 1. IF (DA =3D=3D LocalSID) && (SA !=3D internal address or SID space) 2. drop This clearly shows that, an SID may be used as IPv6 SA. Once that happens, an ICMPv6 error may be send to this SID. Imagine the scenario: A PE1 and a PE2 both configure SRv6-VPN using End.DT4 through an IPv6 netwo= rk without any other SRv6 nodes in between. The Normal VPNv4 service runs perfectly without using SRH. Isn't it more beautiful to allow pinging the End.DT4 of PE2 from PE1 withou= t using SRH (and the O-bit in it)? And more beautiful to allow pinging the End.DT4 of PE1 from PE2 the same wa= y? It can reduce the unnecessary IPv6 address consumption and configuration as= well. In the above case, there is only one IPv6 address (the End.DT4) on PE1/PE2 = required: (1) When PE1 send Customer packet to PE2, it uses PE1's End.DT4 as SA and u= ses PE2's End.DT4 as DA. (2) When PE2 send Customer packet to PE1, it uses PE2's End.DT4 as SA and u= ses PE1's End.DT4 as DA. Thanks Jingrong --_000_16253F7987E4F346823E305D08F9115AAB8F333Dnkgeml514mbschi_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Hi,
Please see my comments inline below:

From: Zafar Ali (= zali) [zali@cisco.com]
Sent: Wednesday, July 17, 2019 8:48
To: Xiejingrong; 6man@ietf.org
Cc: Zafar Ali (zali); spring@ietf.org
Subject: Re: Comments on <draft-ali-6man-spring-srv6-oam-02>

Hi Xiejingrong,

 

Many thanks for your comments. Greatly app= reciated.

 

First off, let=92s take the example in sec= tion 4.2.2.2 of the draft.

Let=92s also modify the example using END.= DT4 SID in your example.

 

I.e., user user wants to =
traceroute to a remote SID function B:5:DT4, via <B:2:C31, B:4:C52> f=
rom node N1 using O-bit.

 

In this case,

 

Node N1 initiates a traceroute probe wit=
h SRH as follows (A:1::,
      B:2:C31)(=
B:5:DT4, B:4:C52, B:2:C31; HC=3D64, SL=3D2, Flags.O=3D1;
      NH=3DUDP)=
(Traceroute Probe).

 

When O-bit is processed at node 2, we the = existing pseudo code works fine.

When O-bit is processed at node 4, we the = existing pseudo code works fine.

The pseudo code for O-bit processing at no= de 5 needs a fix =96 please see [ZA] in-line for the suggested change to ad= dress your comment.

We can make the change to address your com= ment during the IETF week.

[XJ= R] This example works for me after the following change about repeated ICMP= messages. 

[XJ= R] But still there is a problem not solved, see below marked with [XJR0719]= :

Thanks

 

Regards =85 Zafar

 

Fro= m: ipv6 <ipv6-bounces@iet= f.org> on behalf of Xiejingrong <xiejingrong@huawei.com>
Date: Tuesday, July 9, 2019 at 10:34 PM
To: "6man@ietf.org" <6man@ietf.org>
Subject: Comments on <draft-ali-6man-spring-srv6-oam-02>

 

Hi,

I have a few comments on <draft-ali-6man-spring-srv6-oam-02>:

 

3.1.1.  O-flag Processing

   Implementation of the O-flag is OPTIONAL.  A node = MAY ignore

   SRH.Flags.O-flag.  It is also possible that a node= is capable of

   supporting the O-bit but based on a local decision it M= AY ignore it

   during processing on some local SIDs.  If a node d= oes not support the

   O-flag, then upon reception it simply ignores it. = If a node supports

   the O-flag, it can optionally advertise its potential v= ia node

   capability advertisement in IGP [I-D.ietf-isis-srv6- ex= tensions] and

   BGP-LS [I-D.ietf-idr-bgpls-srv6-ext].

 

   The SRH.Flags.O-flag implements the "punt a timest= amped copy and

   forward" behavior.

 

   When N receives a packet whose IPv6 DA is S and S is a = local SID, N

   executes the following pseudo-code, before the executio= n of the local

   SID S.

 

     1. IF SRH.Flags.O-flag is one and local con= figuration permits THEN

            a= . Make a copy of the packet.

            b= . Send the copied packet, along with an accurate timestamp

           &n= bsp;   to the OAM process.      ;; Ref1<= /span>,

[ZA] Add Ref2

     Ref1: An implementation SHOULD copy and rec= ord the timestamp as soon as

     possible during packet processing. Timestam= p is not carried in the packet

     forwarded to the next hop.

 

[ZA] Ref2: An implementation should not ge= nerate further ICMP error during local SID S processing. If local SID S pro= cessing requires generation of an ICMP error, the error is generated by the= local OAM process.

 

[XJR] O-flag is OPTIONAL while the process is the first, I don=92t think it= is optimized.

I don't even believe the process is clear until the whole process is put to= gether. I try this for the End.DT4 function (1a to 3a is added as above):

1a.   IF NH=3DSRH AND SRH.Flags.O-flag is one and local configura= tion permits THEN

2a.      a. Make a copy of the packet.

3a.      b. Send the copied packet, along with an = accurate timestamp to the OAM process. ;; Ref1

1.   IF NH=3DSRH and SL > 0

2.      drop the packet    &nb= sp;            =             &nb= sp;           ;; Ref1

3.   ELSE IF ENH =3D 4       &= nbsp;           &nbs= p;            &= nbsp;           ;; Ref2

4.      pop the (outer) IPv6 header and its extens= ion headers

5.      lookup the exposed inner IPv4 DA in IPv4 t= able T

6.      forward via the matched table entry

7.   ELSE

8.      Send an ICMP parameter problem message&nbs= p;            &= nbsp;    ;; Ref3

9.      drop the packet

 

Then a packet (NH=3DSRH<with O flag>, SL=3D0, ENH=3DICMPv6) will go t= o 2a/3a and 8/9, means that two ICMP will be send to CPU. Right ?

Besides, the Step 1 to 9 should be more optimized, other than deep check of= SRH.Flags.O-flag at the beginning.

 

[ZA] The pseudo code does not restrict an = implementation to optimize O-bit processing, as necessary, to get the same = behavior.

 

4.1.2.  Pinging a SID Function

   The classic ping described in the previous section cann= ot be used to

   ping a remote SID function, as explained using an examp= le in the

   following.

   Consider the case where the user wants to ping the remo= te SID

   function B:4:C52, via B:2:C31, from node N1.  Node= N1 constructs the

   ping packet (A:1::, B:2:C31)(B:4:C52, B:2:C31, SL=3D1;<= /span>

   NH=3DICMPv6)(ICMPv6 Echo Request)..  The ping fail= s because the node N4

   receives the ICMPv6 echo request with DA set to B:4:C52= but the next

   header is ICMPv6, instead of SRH.  To solve this p= roblem, the

   initiator needs to mark the ICMPv6 echo request as an O= AM packet.

 

[XJR] Who produce the problem then ? Seems like it is the SID itself drop t= he ICMPv6 packet.

I guess it is easy for an SID to support sending the ICMPv6 packet to CPU, = and support pinging this SID just the same as pinging a classic IPv6 addres= s. Is it ?

I try this for the End.DT4 function (add 7A and 8A):

 

1.   IF NH=3DSRH and SL > 0

2.      drop the packet    &nb= sp;            =             &nb= sp;           ;; Ref1

3.   ELSE IF ENH =3D 4       &= nbsp;           &nbs= p;            &= nbsp;           ;; Ref2

4.      pop the (outer) IPv6 header and its extens= ion headers

5.      lookup the exposed inner IPv4 DA in IPv4 t= able T

6.      forward via the matched table entry

7A.   ELSE IF ENH =3D 58

8A.      Send the packet to CPU

7.   ELSE

8.      Send an ICMP parameter problem message&nbs= p;            &= nbsp;    ;; Ref3

9.      drop the packet

 

Isn=92t this simpler than adding a new End.OTP SID ?

The normal use of End.DT4 doesn=92t require an SRH header, while the pingin= g of the End.DT4 need to add an SRH with an End.OTP and the End.DT4. That l= ooks strange to me.

 

[ZA] The issue is that an implementation m= ay not send ICMP error.


[XJR0719] 

There is hint in the draft <draft-ietf-sprin= g-srv6-network-programming> that an SID may receive ICMP error:


7.2.  SEC-2

   An SRv6 router MUST support an ACL= with the following behavior:

   1.   IF (DA =3D=3D Local= SID) && (SA !=3D internal address or SID space)

   2.      drop=


This clearly shows that, an SID may be used as = IPv6 SA. 

Once that happens, an ICMPv6 error may be send = to this SID.


Imagine the scenario:

A PE1 and a PE2 both configure SRv6-VPN using End.DT4 thro= ugh an IPv6 network without any other SRv6 nodes in between.<= /p>

The Normal VPNv4 service runs perfectly without using SRH.=


Isn't it more beautiful to allow pinging the End.DT4 of PE= 2 from PE1 without using SRH (and the O-bit in it)?

And more beautiful to allow pinging the End.DT4 of PE1 fro= m PE2 the same way?


It can reduce the unnecessary IPv6 address consumption and= configuration as well. 

In the above case, there is only o= ne IPv6 address (the End.DT4) on PE1/PE2 required:

(1) When PE1 send Customer packet to PE2, it uses PE1's En= d.DT4 as SA and uses PE2's End.DT4 as DA.

(2) When PE2 send Customer packet to = PE1, it uses PE2's End.DT4 as SA and uses PE1's End.DT4 as DA. =


Thanks

Jingrong




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[73.189.13.44]) by smtp.gmail.com with ESMTPSA id l31sm56709455pgm.63.2019.07.19.12.13.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 19 Jul 2019 12:13:14 -0700 (PDT) Date: Fri, 19 Jul 2019 12:13:07 -0700 From: Jeff Tantsura To: spring , SPRING WG , "=?utf-8?Q?=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)?=" , Linda Dunbar Message-ID: In-Reply-To: References: <53f3a00b-2dc1-4762-99c3-de7f57b592d2@Spark> X-Readdle-Message-ID: d09e1420-f318-4af1-b69d-4fabf62c79cd@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d321648_3a4be92a_c7f7" Archived-At: Subject: Re: [spring] Seeking comments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate for not-directly connect SDWAN edges to use GRE/VxLAN header bits to indicate the desired SR path? X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Jul 2019 19:13:19 -0000 --5d321648_3a4be92a_c7f7 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Linda, We are not converging, please read the draft. Note - SRinUDP doesn=E2=80=99t require device that imposes the SIDs to th= e device that encapsulates it in IP/UDP, neither should it be directly co= nnected. SR allows you to encode the desired =C2=A0path in data plane, either dire= ctly, by imposing 1 or more SID=E2=80=99s, where the bottom one if the de= stination, or by encoding meta-data in a Binding SID, when BSID gets look= up up by the anchor node (device that own the BSID) - SR Edge in your cas= e, it would expand BSID into a full path or a combination of BSID=E2=80=99= s and NSIDs =C2=A0(AKA segmented path). In your case specifically and in a most simple way - SDWAN edge would be = programmed to impose a SID stack that is: dest->BSID (desired SR path - c= ould have another level(s) of indirections)->SR edge. As per draft-ietf-m= pls-sr-over-ip - IP/UDP header would be imposed with DIP of SR edge (that= is also the anchor for BSID) and DPORT set to 6635 (R=46C7510), there ar= e also other ways to resolve desired SR path on demand (BGP, PCEP, etc). = Note you need co-operation between WAN (SR) controller and SDWAN controll= er. There=E2=80=99s absolutely no need to (ab)using GRE/VxLAN header bits. Please let me know if anything is still unclear, we could also meet in Mo= ntreal. Cheers, Jeff On Jul 18, 2019, 5:09 PM -0700, Linda Dunbar , wrote: > Jeff, > > There are several scenarios (which have been documented in the draft): > One scenario has SDWAN edge node not directly attached to SR edge. The = draft is suggesting VxLAN or GRE to connect the SDWAN edge and the SR edg= e. > > Linda > > =46rom: Jeff Tantsura > Sent: Thursday, July 18, 2019 2:25 PM > To: spring ; SPRING WG ; = =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) ; Linda Dunbar > Subject: RE: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-ov= er-hybrid-networks: is it appropriate for not-directly connect SDWAN edge= s to use GRE/VxLAN header bits to indicate the desired SR path=3F > > Linda, > > In context of=C2=A0draft-ietf-mpls-sr-over-ip it would be IP->SRinUDP->= SR-native-> SRinUDP->IP > > Cheers, > Jeff > On Jul 18, 2019, 9:16 AM -0700, Linda Dunbar , wrote: > > > Jeff, > > > > =46or SDWAN case, the Source node and Destination nodes (a.k.a. SDWAN= edge nodes) are IP based. > > > > So it should be reversed, IP segments -> SR segments which include bo= th SRv6 & MPLS-SR -> IP segments > > > > Linda > > > > =46rom: Jeff Tantsura > > Sent: Monday, July 15, 2019 5:48 PM > > To: spring ; SPRING WG = ; =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) ; Linda Dunbar > > Subject: RE: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-= over-hybrid-networks: is it appropriate for not-directly connect SDWAN ed= ges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > Linda, > > > > What you want is to use native MPLS when available and encapsulate MP= LS packets in IP/UDP when you need to travers IP, you destination in the = imposed IP header would be that of the next SR capable device as describe= d in draft-ietf-mpls-sr-over-ip. > > > > Cheers, > > Jeff > > On Jul 15, 2019, 3:24 PM -0700, Linda Dunbar , wrote: > > > > > > Jeff, > > > > > > The draft-ietf-mpls-sr-over-ip only has MPLS packets being tunneled= by IP, but not reversed (IP packets tunneled over MPLS). > > > > > > Do you think it worthwhile to add some similar sections (of course = with different content), such as =46orwarding entry Construction, forward= ing procedures as in draft-ietf-mpls-sr-over-ip=3F > > > > > > Linda > > > > > > =46rom: Jeff Tantsura > > > Sent: Tuesday, July 09, 2019 4:03 PM > > > To: spring ; Linda Dunbar ; SPRING WG ; =E5=BE=90=E5=B0=8F=E8=99=8E= (=E4=B9=89=E5=85=88) > > > Subject: Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwa= n-over-hybrid-networks: is it appropriate for not-directly connect SDWAN = edges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > +1 > > > > > > take a look at=C2=A0draft-ietf-mpls-sr-over-ip > > > > > > Cheers, > > > Jeff > > > On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89= =E5=85=88) , wrote: > > > > Hi Linda, > > > > > > > > Why not directly use the MPLSoUDP encapsulation to carry the B-SI= D label=C2=A0so as to indicate the preferred path=3F =46or more details, = please read=C2=A0https://tools.ietf.org/html/draft-dukes-spring-sr-for-sd= wan-02=23section-7.3 > > > > > > > > Best regards, > > > > Xiaohu > > > > > > > > > ---------------------------------------------------------------= --- > > > > > =46rom:Linda Dunbar > > > > > Send Time:2019=E5=B9=B47=E6=9C=889=E6=97=A5(=E6=98=9F=E6=9C=9F=E4= =BA=8C) 06:26 > > > > > To:Linda Dunbar ; SPRING WG > > > > > Subject:Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-s= dwan-over-hybrid-networks: is it appropriate for not-directly connect SDW= AN edges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > > > > > Sorry, I meant to ask: > > > > > > > > > > When the SDWAN edge nodes are NOT directly connected to the PEs= of SR domain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN he= ader bits to indicate the desired SR Path=3F > > > > > > > > > > Linda > > > > > > > > > > =46rom: spring On Behalf Of Linda D= unbar > > > > > Sent: Monday, July 08, 2019 5:11 PM > > > > > To: SPRING WG > > > > > Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwa= n-over-hybrid-networks: is it appropriate for not-directly connect SDWAN = edges to use GRE/VxLAN header bits to indicate the desired SR path=3F > > > > > > > > > > SD-WAN, as described by ONUG (Open Network User Group), is abou= t pooling WAN bandwidth from multiple service providers to get better WAN= bandwidth management, visibility & control. > > > > > Because of the ephemeral property of the selected Cloud DCs, an= enterprise or its network service provider may not have the direct links= to the Cloud DCs that are optimal for hosting the enterprise=E2=80=99s s= pecific workloads/Apps. Under those circumstances, SD-WAN is a very flexi= ble choice to interconnect the enterprise on-premises data centers & bran= ch offices to its desired Cloud DCs... > > > > > However, SD-WAN paths over public internet can have unpredictab= le performance, especially over long distances and cross state/country bo= undaries. Therefore, it is highly desirable to place as much as possible = the portion of SD-WAN paths over service provider VPN (e.g. enterprise=E2= =80=99s existing VPN) that have guaranteed SLA and to minimize the distan= ce/segments over public internet. > > > > > > > > > > https://datatracker.ietf.org/doc/draft-dunbar-sr-sdwan-over-hyb= rid-networks/ describes a method to enforce a SD-WAN path=E2=80=99s head-= end selected route traversing through a list of specific nodes of multipl= e network segments without requiring the nodes in each network segments t= o have the intelligence (or maintaining states) of selecting next hop or = next segments. > > > > > > > > > > When a SR domain has multiple PEs with ports facing the externa= l networks (such as the public internet or LTE termination), SD-WAN paths= can traverse the SR domain via different ingress/egress PEs resulting in= different E2E performance. > > > > > > > > > > Even with the same ingress/egress, some flows may need differen= t segments across the SR Domain. It is not practical, or even possible, f= or PEs to determine which Apps=E2=80=99 flows should egress. > > > > > Segment Routing can be used to steer packets (or path) to trave= rse the explicit egress node, or explicit segments through the SR Domain = based on the SLA requested by the SD-WAN head-end nodes. > > > > > > > > > > When the SDWAN edge nodes are directly connected to the PEs of = SR domain, is it appropriate for SDWAN edge nodes to use GRE/VxLAN header= bits to indicate the desired SR Path=3F > > > > > > > > > > We are looking for feedback, criticisms, or suggestion on the t= he proposed approach. > > > > > > > > > > Thank you, > > > > > Linda > > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= > > > > spring mailing list > > > > spring=40ietf.org > > > > https://www.ietf.org/mailman/listinfo/spring --5d321648_3a4be92a_c7f7 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Linda,

We are not converging, please read the draft.
=

Note - SRinUDP doesn=E2=80=99t require device that = imposes the SIDs to the device that encapsulates it in IP/UDP, neither sh= ould it be directly connected.
SR allows you to encode the desired &=23160;path in= data plane, either directly, by imposing 1 or more SID=E2=80=99s, where = the bottom one if the destination, or by encoding meta-data in a Binding = SID, when BSID gets lookup up by the anchor node (device that own the BSI= D) - SR Edge in your case, it would expand BSID into a full path or a com= bination of BSID=E2=80=99s and NSIDs &=23160;(AKA segmented path).
In your case specifically and in a most simple way = - SDWAN edge would be programmed to impose a SID stack that is: dest->= BSID (desired SR path - could have another level(s) of indirections)->= SR edge. As per draft-ietf-mpls-sr-over-ip - IP/UDP header would be impos= ed with DIP of SR edge (that is also the anchor for BSID) and DPORT set t= o 6635 (R=46C7510), there are also other ways to resolve desired SR path = on demand (BGP, PCEP, etc). Note you need co-operation between WAN (SR) c= ontroller and SDWAN controller.

There=E2=80=99s absolutely no need to (ab)using GRE= /VxLAN header bits.

Please let me know if anything is still unclear, we= could also meet in Montreal.&=23160;

Cheers,
Jeff
On Jul 18, 2019, 5:09 PM -0700, Lin= da Dunbar <linda.dunbar=40futurewei.com>, wrote:

Jeff,

&=23160;

There are several scenarios (which have been d= ocumented in the draft):

One scenario has SDWAN edge node not directly = attached to SR edge. The draft is suggesting VxLAN or GRE to connect the = SDWAN edge and the SR edge.

&=23160;

Linda

&=23160;

=46rom: Jeff Tantsura <jefftant.ietf= =40gmail.com>
Sent: Thursday, July 18, 2019 2:25 PM
To: spring <spring-bounces=40ietf.org>; SPRING WG <spring= =40ietf.org>; =E5=BE=90=E5=B0=8F= =E8=99=8E(=E4=B9=89=E5=85=88= ) <xiaohu.xxh=40alibaba-inc.com>; Linda Dunbar <linda.dun= bar=40futurewei.com>
Subject: RE: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

Linda,

&=23160;

In context of&=23160;draft-ietf-mpls-sr-over-i= p it would be IP->SRinUDP->SR-native-> SRinUDP->IP

&=23160;

Cheers,

Jeff

On Jul 18, 2019, 9:16 AM -0700, Linda Dunbar &= lt;linda.dunbar=40fut= urewei.com>, wrote:

Jeff,

&=23160;

=46or SDWAN case, the Source node and Destination node= s (a.k.a. SDWAN edge nodes) are IP based.

&=23160;

So it should be reversed, IP segments -> SR segment= s which include both SRv6 & MPLS-SR -> IP segments

&=23160;

Linda

&=23160;

=46rom: Jeff Tantsura <jefftant.ietf=40gmail.com>
Sent: Monday, July 15, 2019 5:48 PM
To: spring <sp= ring-bounces=40ietf.org>; SPRING WG <spring=40ietf.org>; =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh=40alibaba-inc.com>; Linda Dunbar <<= a href=3D=22mailto:linda.dunbar=40futurewei.com=22>linda.dunbar=40futurew= ei.com>
Subject: RE: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

Linda,

&=23160;

What you want is to use native MPLS when available and= encapsulate MPLS packets in IP/UDP when you need to travers IP, you dest= ination in the imposed IP header would be that of the next SR capable dev= ice as described in draft-ietf-mpls-sr-over-ip.

&=23160;

Cheers,

Jeff

On Jul 15, 2019, 3:24 PM -0700, Linda Dunbar <linda.dunbar=40futurewei.com&g= t;, wrote:

&=23160;

Jeff,

&=23160;

The draft-ietf-mpls-sr-over-ip only has MPLS packets b= eing tunneled by IP, but not reversed (IP packets tunneled over MPLS).

&=23160;

Do you think it worthwhile to add some similar section= s (of course with different content), such as =46orwarding entry Construc= tion, forwarding procedures as in draft-ietf-mpls-sr-over-ip=3F

&=23160;

Linda

&=23160;

=46rom: Jeff Tantsura <jefftant.ietf=40gmail.com>
Sent: Tuesday, July 09, 2019 4:03 PM
To: spring <sp= ring-bounces=40ietf.org>; Linda Dunbar <linda.dunbar=40futurewei.com>; SPRING= WG <spring=40ietf.org>= ;; =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &= lt;xiaohu.xxh=40aliba= ba-inc.com>
Subject: Re: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdw= an-over-hybrid-networks: is it appropriate for not-directly connect SDWAN= edges to use GRE/VxLAN header bits to indicate the desired SR path=3F

&=23160;

+1

&=23160;

take a look at&=23160;draft-ietf-mpls-sr-over-ip

&=23160;

Cheers,

Jeff

On Jul 8, 2019, 11:45 PM -0700, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh=40alibaba-inc.com>, wrote:

Hi Linda,

&=23160;

Why not directly use the MPLSoUDP en= capsulation to carry the B-SID label&=23160;so as to indicate the preferr= ed path=3F =46or more details, please read&=23160;https://tools.ietf.org/html/draft= -dukes-spring-sr-for-sdwan-02=23section-7.3&=23160;

&=23160;

Best regards,

Xiaohu

&=23160;

------------------------------------= ------------------------------

=46rom:Linda Dunbar <linda.dunbar=40futurewei.com&g= t;

Send Time:2019=E5=B9=B4<= span style=3D=22font-size:10.5pt;font-family:"Tahoma",sans-seri= f;color:black=22>7=E6=9C=889=E6=97=A5= (=E6=98=9F=E6=9C=9F=E4=BA=8C) 06:26

To:Linda Dunbar <linda.dunbar=40futurewei.com>;= SPRING WG <spring=40ietf.org= >

Subject:Re: =5Bspring=5D Seeking com= ments for draft-dunbar-sr-sdwan-over-hybrid-networks: is it appropriate f= or not-directly connect SDWAN edges to use GRE/VxLAN header bits to indic= ate the desired SR path=3F

&=23160;

Sorry, I meant to ask:=

&=23160;

When the SDWAN edge no= des are NOT directly connected to the PEs of SR domain, is it appropri= ate for SDWAN edge nodes to use GRE/VxLAN header bits to indicate the des= ired SR Path=3F

&=23160;

Linda

&=23160;

=46rom: = spring <spring-bounces=40ietf.org> On Behalf Of = Linda Dunbar
Sent: Monday, July 08, 2019 5:11 PM
To: SPRING WG <spring=40= ietf.org>
Subject: =5Bspring=5D Seeking comments for draft-dunbar-sr-sdwan-o= ver-hybrid-networks: is it appropriate for not-directly connect SDWAN edg= es to use GRE/VxLAN header bits to indicate the desired SR path=3F=

&=23160;

SD-WAN, as described b= y ONUG (Open Network User Group), is about pooling WAN bandwidth from mul= tiple service providers to get better WAN bandwidth management, visibilit= y & control.

Because of the ephemer= al property of the selected Cloud DCs, an enterprise or its network servi= ce provider may not have the direct links to the Cloud DCs that are optim= al for hosting the enterprise=E2=80=99s specific workloads/Apps. Under th= ose circumstances, SD-WAN is a very flexible choice to interconnect the e= nterprise on-premises data centers & branch offices to its desired Cl= oud DCs...

However, SD-WAN paths = over public internet can have unpredictable performance, especially over = long distances and cross state/country boundaries. Therefore, it is highl= y desirable to place as much as possible the portion of SD-WAN paths over= service provider VPN (e.g. enterprise=E2=80=99s existing VPN) that have = guaranteed SLA and to minimize the distance/segments over public internet= .

&=23160;

https://datatracker.ietf.org/doc/draft= -dunbar-sr-sdwan-over-hybrid-networks/ describes a method to enforce = a SD-WAN path=E2=80=99s head-end selected route traversing through a list= of specific nodes of multiple network segments without requiring the nod= es in each network segments to have the intelligence (or maintaining stat= es) of selecting next hop or next segments.

&=23160;

When a SR domain has m= ultiple PEs with ports facing the external networks (such as the public i= nternet or LTE termination), SD-WAN paths can traverse the SR domain via = different ingress/egress PEs resulting in different E2E performance.

&=23160;

Even with the same ing= ress/egress, some flows may need different segments across the SR Domain.= It is not practical, or even possible, for PEs to determine which Apps=E2= =80=99 flows should egress.

Segment Routing can be= used to steer packets (or path) to traverse the explicit egress node, or= explicit segments through the SR Domain based on the SLA requested by th= e SD-WAN head-end nodes.

&=23160;

When the SDWAN edge no= des are directly connected to the PEs of SR domain, is it appropriate for= SDWAN edge nodes to use GRE/VxLAN header bits to indicate the desired SR= Path=3F

&=23160;

We are looking for fee= dback, criticisms, or suggestion on the the proposed approach.

=

&=23160;

Thank you,

Linda &=23160;<= /p>

=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F
spring mailing list
spring=40ietf.org
= https://www.ietf.org/mailman/listinfo/spring

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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Not aware of any undisclosed IPR Bart From: Rob Shakir Sent: Thursday, June 27, 2019 8:14 AM To: draft-xuclad-spring-sr-service-programming@ietf.org; SPRING WG List Subject: IPR Poll: draft-xuclad-spring-sr-service-programming Hi Authors, SPRING WG, In parallel to the call for working group adoption for draft-xuclad-spring-= sr-service-programming we would like to poll for IPR. If you are aware of IPR that applies to draft-xuclad-sr-service-programming= please respond to this email. If you are aware of IPR, please indicate whe= ther it has been disclosed in accordance to the IETF IPR rules (detailed ar= e described in RFCs 3979, 4879, 3669 and 5378). If you are an author or contributor please respond to this email regardless= of whether or not you're aware of any IPR. If you are not an author or con= tributor, please explicitly respond only if you're aware of IPR that has no= t yet been disclosed. This document will not advance into the working group until such time as we= have received IPR confirmations from all authors and contributors. Thanks! Rob & Bruno This e-mail cannot be used for other purposes than Proximus business use. S= ee more on https://www.proximus.be/maildisclaimer --_000_AM0PR08MB320252F4EB34C66FDBDF704AFFC40AM0PR08MB3202eurp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi

 

Not aware of any undisclosed IPR

&nbs= p;

Bart=

&nbs= p;

 

From: Rob Shakir <robjs@google.com>
Sent: Thursday, June 27, 2019 8:14 AM
To: draft-xuclad-spring-sr-service-programming@ietf.org; SPRING WG L= ist <spring@ietf.org>
Subject: IPR Poll: draft-xuclad-spring-sr-service-programming

 

Hi Authors, SPRING WG,

 

In parallel to the call for working group adoption for draft-xuclad-spring-sr-service-programming we would like to pol= l for IPR.

 

If you are aware of IPR that applies to draft-xuclad-sr-service-p= rogramming please respond to this email. If you are aware of IPR, please in= dicate whether it has been disclosed in accordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879, 3669 and= 5378).

 

If you are an author or contributor please respond to this email regardless of w= hether or not you're aware of any IPR. If you are not an author or contribu= tor, please explicitly respond only if you're aware of IPR that has not yet= been disclosed.

 

This document will not advance into the working group until such time = as we have received IPR confirmations from all authors and contributors.

 

Thanks!

Rob & Bruno  

This e-mail cannot be used for other purposes than Proximus bu= siness use. See more on https://www.proximus.be/maildisclaimer
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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear Authors I have the below comments on the draft. 1. Section 1.Introduction "This provides a major improvment compared to LFA ([RFC5286]) and remote LFA ([RFC7490]) which cannot be applicable in some topologies ([RFC6571])." Change to This provides a major improvement compared to LFA ([RFC5286]) and remote LFA ([RFC7490]) which cannot provide complete protection coverage in some topologies ([RFC6571]). 2. I suggest to add a new section for building repair segments . The text appears randomly and it is not very readable. Suggest to re-arrange as below -------------------------------------------------------------------------= -------------- 5. Building Repair lists The repair list consist of node segments and adjacency segmen= ts which represents the protection path from PLR to the destination. o The active adjacency segments MUST be popped and the repair-list MUST = be inserted at the head of the list. o The active node segments MUST be popped and repair-list inserted as th= e last segment of repair list, If the repair list ends with an adjacency segment terminating= on the tail-end of the active segment, and if the active segment has been signalled= with penultimate hop popping. o The active node segment MUST be retained as the last segment in the re= pair-list if the active node segment has been signaled with ultimate hop popping. o If the SRGB at the Q node is different from the SRGB at the PLR, then the active segment (before the insertion of the repair list) MUST be updated to fit the SRGB of the Q node. -------------------------------------------------------------------------= ---------------------- 3. Protecting segments It is not clear what do the section 5.2.1 and 5.2.2 represent. Are these for link-protection cases? You don't have to look into next lab= el for link-protection cases. The mid-point node failure section 5.3 addresses node as well adjacency S= ID cases so 5.2.1 and 5.2.2 need not talk about node protection. 4. Modern routing architectures have separate control plane and data plane. section 5.3 language seem to suggest a lot of contol plane like processin= g in the forwarding plane. The entire description has a MUST term which mandates implementing expensiv= e operation in forwarding plane.Suggest to add below text in section 5.3 and = also change all MUST in 5.3.1 and 5.3.2 to non-normative should. I have copied the entire 5.3 section with suggested changes highlighted in = bold ---------------------------------------------------------------------------= ---------------------- 5.3 Section 5.3.1 and 5.3.2 describe the processing for incoming Node and Adja= cency SIDs when the next label in the packet is either a node/adj-sid. The description below is intended to specify the forwarding behavior requir= ed for node protection. The description should not be interpreted as limiting the possible implemen= tations of this forwarding behavior. An implementation complies with the description below as long as the extern= ally visible forwarding behavior produced by the implementation is the same as that described below. 5.3.1. Protecting {F, T, D} or {S->F, T, D} This section describes the protection behavior of S when all of the following conditions are true: 1. the active segment is a prefix SID for a neighbor F, or an adjacency segment S->F 2. the primary interface used to forward the packet failed 3. the segment following the active segment is a prefix SID (for node T) 4. node protection is active for that interface. In such a case, the PLR should:>>>>>>>>Change to non-normative should 1. apply a NEXT operation; the segment F or S->F is removed 2. Confirm that the next segment is in the SRGB of F, meaning that the next segment is a prefix segment, e.g. for node T 3. Retrieve the segment ID of T (as per the SRGB of F) 4. Apply a NEXT operation followed by a PUSH operation of T's segment based on the SRGB of node S. 5. Look up T's segment (based on the updated label value) and forward accordingly. 5.3.2. Protecting {F, F->T, D} or {S->F, F->T, D} This section describes the protection behavior of S when all of the following conditions are true: 1. the active segment is a prefix SID for a neighbor F, or an adjacency segment S->F 2. the primary interface used to forward the packet failed 3. the segment following the active segment is an adjacency SID (F- >T) 4. node protection is active for that interface. In such a case, the PLR should:>>>>>>>>>Change to non normative "should" 1. Apply a NEXT operation; the segment F or S->F is removed 2. Confirm that the next segment is an adjacency SID of F, say F->T 3. Retrieve the node segment ID associated to T (as per the set of Adjacency Segments of F) 4. Apply a NEXT operation on the next segment followed by a PUSH of T's segment based on the SRGB of the node S. 5. Look up T's segment (based on the updated label value) and forward accordingly. -------------------------------------------------------------------------= ----------------------- --_000_BYAPR05MB394322E54C69787E6DBA901DD5C40BYAPR05MB3943namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Dear Authors
 
I have the below comments on the draft.
           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;             =
1. Section 1.Introduction
 
   "This provides a major improvment compared to LFA
   ([RFC5286]) and remote LFA ([RFC7490]) which cannot be ap= plicable in
   some topologies ([RFC6571])."
  
   Change to
  
   This provides a major improvement compared to LFA
   ([RFC5286]) and remote LFA ([RFC7490]) which cannot provi= de
   complete protection coverage in
   some topologies ([RFC6571]).
 
 
  
  2. I suggest to add a new section for building repair segm= ents .
The text appears randomly and it is not very readable.
Suggest to re-arrange as below
    
  ----------------------------------------------------------= -----------------------------
  5. Building Repair lists
           &nbs= p;  The repair list consist of node segments and adjacency segments wh= ich represents the
           &nbs= p;  protection path from PLR to the destination.
  
 
   o The active adjacency segments MUST be popped and t= he repair-list MUST be inserted
     at the head of the list.
   o The active node segments MUST be popped and repair-list= inserted as the last segment of    repair list,
           &nbs= p;  If the repair list ends with an adjacency segment terminating on t= he tail-end of the
           &nbs= p;   active segment, and if the active segment has been signalled= with penultimate hop popping.
   o The active node segment MUST be retained as the last se= gment in the repair-list if the
     active node segment has been signaled wi= th ultimate hop popping.
  
   o  If the SRGB at the Q node is different from = the SRGB at the PLR,
      then the active segment (before the ins= ertion of the repair list)
      MUST be updated to fit the SRGB of the = Q node.
           &nbs= p; 
           &nbs= p;   
  ----------------------------------------------------------= -------------------------------------
  3. Protecting segments
 
  It is not clear what do the section 5.2.1 and 5.2.2 repres= ent.
  Are these for link-protection cases? You don't have to look int= o next label for link-protection cases.
  The mid-point node failure section 5.3 addresses node as well a= djacency SID cases so 5.2.1 and 5.2.2 need not talk about node protection.<= /div>
 
  4.
 
  Modern routing architectures have separate control plane and da= ta plane.
  section 5.3 language seem to suggest a lot of contol plane like= processing in the forwarding plane.
The entire description has a MUST term which mandates implementing exp= ensive
operation in forwarding plane.Suggest to add below text in section 5.3= and also change all MUST in 5.3.1 and 5.3.2
 to non-normative should.
I have copied the entire 5.3 section with suggested changes highlighte= d in bold
 
----------------------------------------------------------------------= ---------------------------
5.3 
 Section 5.3.1 and 5.3.2 describe the processing for incoming Nod= e and Adjacency SIDs
 when the next label in the packet is either a node/adj-sid.
 
The description below is intended to specify the forwarding behavio= r required for node protection. 
The description should not be interpreted as limiting the possible = implementations of this forwarding behavior. 
An implementation complies with the description below as long as th= e externally visible forwarding behavior produced
by the implementation is the same as that described below.
 
 
  
  5.3.1.  Protecting {F, T, D} or {S->F, T, D}
 
   This section describes the protection behavior of S when = all of the
   following conditions are true:
 
   1.  the active segment is a prefix SID for a neighbo= r F, or an
       adjacency segment S->F
 
   2.  the primary interface used to forward the packet= failed
 
 
   3.  the segment following the active segment is a pr= efix SID (for
       node T)
 
   4.  node protection is active for that interface.
 
   In such a case, the PLR should:>>>>>= ;>>>Change to non-normative should
 
   1.  apply a NEXT operation; the segment F or S->F= is removed
 
   2.  Confirm that the next segment is in the SRGB of = F, meaning that
       the next segment is a prefix segm= ent, e.g. for node T
 
   3.  Retrieve the segment ID of T (as per the SRGB of= F)
 
   4.  Apply a NEXT operation followed by a PUSH operat= ion of T's
       segment based on the SRGB of node= S.
 
   5.  Look up T's segment (based on the updated label = value) and
       forward accordingly.
 
5.3.2.  Protecting {F, F->T, D} or {S->F, F->T, D}
 
   This section describes the protection behavior of S when = all of the
   following conditions are true:
 
   1.  the active segment is a prefix SID for a neighbo= r F, or an
       adjacency segment S->F
 
  2.  the primary interface used to forward the packet = failed
 
   3.  the segment following the active segment is an a= djacency SID (F-
       >T)
 
   4.  node protection is active for that interface.
 
   In such a case, the PLR should:>>>>>= ;>>>>Change to non normative "should"
 
   1.  Apply a NEXT operation; the segment F or S->F= is removed
 
   2.  Confirm that the next segment is an adjacency SI= D of F, say F->T
 
   3.  Retrieve the node segment ID associated to T (as= per the set of
       Adjacency Segments of F)
 
   4.  Apply a NEXT operation on the next segment follo= wed by a PUSH of
       T's segment based on the SRGB of = the node S.
 
 
   5.  Look up T's segment (based on the updated label = value) and
       forward accordingly.
 
  ---------------------------------------------------------------= ---------------------------------
 
 
 --_000_BYAPR05MB394322E54C69787E6DBA901DD5C40BYAPR05MB3943namp_-- From nobody Tue Jul 23 07:28:03 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C9A771202D4; Tue, 23 Jul 2019 07:28:01 -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 5UAVuAZ-V5O5; Tue, 23 Jul 2019 07:27:59 -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) 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(mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) (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 91ED912033F; Tue, 23 Jul 2019 07:28:53 -0700 (PDT) Received: by mail-lj1-x232.google.com with SMTP id v24so41327411ljg.13; Tue, 23 Jul 2019 07:28:53 -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; bh=ZmoDtmEYUYTTQBQZIJNifO38kv/TtxTd1lMckYEEQYk=; b=Mv/Wx304s4tyEAgCDiLK6wR7zh/i4GcXkw8uYA525ME/PinNJ+UHauF/I4zPrOuEUY EO7xoiYbzSxsF3PMdKDs6szR1Ru6yIHiA3wkqpIpjZrxPf/Q6aI0zehVkP6s948VQYXw ZGl9twH4/sVf4XRMAxRJ+WdYzOxyxOFfpfIKEjndrAcT+amxoF/esoU9t5OguaeBA54I 6owXS1AZ+11BuuXc+RrbYt4IfmvjoxXL4WanDNgKvG3s1UrK52eiegqI4eBbRVLfpkXZ EgAtZGD/PfYdGQHD5WgM2XpF77ZFOF7gXSJu+GsdFDN0DcKKjJobTd15HvcO3zF1DuTO fhtg== 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; bh=ZmoDtmEYUYTTQBQZIJNifO38kv/TtxTd1lMckYEEQYk=; b=EeSoMZhI6pbZQEe5F+mfpMJbnXIjNTlMAdDDhfPk1d0BLubNngPJw/bLWa1k5t82dY qAVA5rXOCEOAUu3xotRE6hKxk3rte79qFUmmSGA19sAkPD4nKMyQawRAm3i5l0roUjER 9cB/Sjti/FduzkOKfRqJzoMBVyvf053UNx6bvRy1ZSImWnR39BsCMFtpkQTf2b8oIPqJ ExfaBk9DM9fr97k4+/zwI3+LHmw8JkaynmsNHXSCjlVEtNNorLXiGZCTcfRkasnhSzQz 0g4EDia9EXR58t7xbk0i16WwbhXf19hVT9R/KOMjfa5hqHMe3wIG8k3hgu9R3yOgQ7UO sMpg== X-Gm-Message-State: APjAAAUozxe0I+KO6CPVyuOlC3stiMNx/VKO5As32YqlUxNPMH9BWsk1 GH9UpXyCIX0MpXto5NFQWIWRCymHB5x/68pIdHehZhlp79k= X-Google-Smtp-Source: APXvYqxYWoxcWTFp/Rhz0tfrfXQgUF+05nwhNHJMjqZ/Wbo4dxMuZy3r/gDvJuV2lqQ8dfJB2Bl0adI+0gYRkNVOt/s= X-Received: by 2002:a2e:b047:: with SMTP id d7mr40474490ljl.8.1563892131346; Tue, 23 Jul 2019 07:28:51 -0700 (PDT) MIME-Version: 1.0 From: Greg Mirsky Date: Tue, 23 Jul 2019 10:28:42 -0400 Message-ID: To: draft-ninan-spring-mpls-inter-as-oam@ietf.org, mpls@ietf.org, spring Content-Type: multipart/alternative; boundary="000000000000f4bd0c058e5a02cd" Archived-At: Subject: [spring] Followup on my comments on draft-ninan-spring-mpls-inter-as-oam X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jul 2019 14:29:05 -0000 --000000000000f4bd0c058e5a02cd Content-Type: text/plain; charset="UTF-8" Dear Authors, et al., I've wanted to continue with my comments to the draft you've presented at MPLS WG meeting on Monday. As I've mentioned, please review draft-mirsky-spring-bfd and Section 4 Use Non-FEC Path TLV in particular. Welcome your comments, questions, and hope we can work together on the solution of our use cases. Regards, Greg --000000000000f4bd0c058e5a02cd Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear Authors, et al.,
I've wanted to continue with= my comments to the draft you've presented at MPLS WG meeting on Monday= . As I've mentioned, please review=C2=A0draft-mirsky-spring-bfd=C2=A0and= Section 4 Use Non-FEC Path TLV in particular. Welcome your comments, quest= ions, and hope we can work together on the solution of our use cases.
=

Regards,
Greg
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"Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jul 2019 20:13:00 -0000 --0000000000006e57f9058e5ed154 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Folks, If you have not sent your slides to us for the SPRING meeting tomorrow, please do so ASAP -- we're still missing many. Please send slides to spring-chairs@ietf.org or upload them via the datatracker: https://datatracker.ietf.org/meeting/105/session/spring Thanks, r. On Thu, Jul 11, 2019 at 8:37 AM Rob Shakir wrote: > Hi SPRING WG, > > Bruno and I have published the agenda for IETF 105 -- please see > https://datatracker.ietf.org/doc/agenda-105-spring/ for details. > > Once again, we were vastly oversubscribed for time in this meeting - with > almost 5 hours of requests for a 2 hour meeting. Most of these requests a= re > for documents that are not discussed on the mailing list, and many of the= m > are for new work. This makes the job of making sure that we have producti= ve > time face-to-face as a working group very difficult for the chairs. This = is > something that Bruno and I are discussing, and will aim to cover during o= ur > short slot at the beginning of the agenda. > > To make sure that our meeting is as productive as possible: > > - if you're a WG participant: please read the drafts before the > meeting, > - if you're presenting: please avoid giving detailed overviews of the > content of your document, and focus on outstanding open technical issu= es, > or questions that you have for the SPRING working group. > > If you have been allocated time, please send your slides by *Monday July > 22nd, at 10:00 EST*. Slides that are received after this time may not be > included in the meeting materials. > > If you were not allocated time, please use this as a gentle shove to > discuss your draft on the mailing list. > > We look forward to meeting in Montr=C3=A9al. > > Safe travels, > Bruno and Rob. > > > --0000000000006e57f9058e5ed154 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Folks,

If you have not sent your s= lides to us for the SPRING meeting tomorrow, please do so ASAP --=C2=A0we&#= 39;re still missing many.

Please send slides to spring-chairs@ietf.org or upload th= em via the datatracker:=C2=A0https://datatracker.ietf.org/meet= ing/105/session/spring

Thanks,
r.=


On Thu, Jul 11, 2019 at 8:37 AM Rob Shakir <robjs@google.com> wrote:
Hi SPRING = WG,

Bruno and I have published the agenda for IETF 105= -- please see=C2=A0https://datatracker.ietf.org/doc/agenda-105-spring/=C2=A0for details.<= /div>

Once again, we were vastly oversubscribed for time in = this meeting - with almost 5 hours of requests for a 2 hour meeting. Most o= f these requests are for documents that are not discussed on the mailing li= st, and many of them are for new work. This makes the job of making sure th= at we have productive time face-to-face as a working group very difficult f= or the chairs. This is something that Bruno and I are discussing, and will = aim to cover during our short slot at the beginning of the agenda.
=
To make sure that our meeting is as productive as possible:
  • if you're a WG participant: please read the drafts before= the meeting,
  • if you're presenting: please avoid giving detaile= d overviews of the content of your document, and focus on outstanding open = technical issues, or questions that you have for the SPRING working group.<= /li>
If you have been allocated time, please send your slides = by Monday July 22nd, at 10:00 EST. Slides that are received after th= is time may not be included in the meeting materials.

= If you were not allocated time, please use this as a gentle shove to discus= s your draft on the mailing list.

We look forward to= meeting in Montr=C3=A9al.

Safe travels,
Bruno= and Rob.


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draft-ietf-spring-segment-routing-policy (ver 03) X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 10:42:08 -0000 --0000000000008357ce058e6af583 Content-Type: text/plain; charset="UTF-8" Authors, Hi! There are some use-cases where the candidate-path (multipath) needs to be constructed in such a way that a part of the multipath (a set of segment-lists) uses one set of constraints, while the other part (another set of segment-lists) uses another set of constraints. Consider the scenario where the traffic needs to be steered onto a policy in such a way that a specified portion of it uses paths that traverse only blue links while the rest uses paths that traverse only red links. The current semantics of a candidate-path as defined in Section 2.2 of version 3 preclude such use-cases. It should be possible to let the semantics be a tad more flexible than they currently are and cater to the above scenario (and the likes of it). There are a few different ways of addressing this, but I would like to propose one that seems least disruptive. In addition to the currently specified semantics: -- A candidate path may comprise of a set of sub-candidate paths where each each sub-candidate path is either dynamic or explicit. The sub-candidate path is the unit of signaling of an SR policy between a headend and a controller. Regards, -Pavan --0000000000008357ce058e6af583 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Authors, Hi!

There are some = use-cases where the candidate-path (multipath) needs to be constructed in s= uch a way that a part of the multipath (a set of segment-lists) uses one se= t of constraints, while the other part (another set of segment-lists) uses = another set of constraints. Consider the scenario where the traffic needs t= o be steered onto a policy in such a way that a specified portion of it use= s paths that traverse only blue links while the rest uses paths that traver= se only red links.

The current semantics of a cand= idate-path as defined in Section 2.2 of version 3 preclude such use-cases. = It should be possible to let the semantics be a tad more flexible than they= currently are and cater to the above scenario (and the likes of it).

There are a few different ways of addressing this, = but I would like to propose one that seems least disruptive.

=
In addition to the currently specified semantics:
-- A= candidate path may comprise of a set of sub-candidate paths where each eac= h sub-candidate path is either dynamic or explicit. The sub-candidate path = is the unit of signaling of an SR policy between a headend and a controller= .

Regards,
-Pavan
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boundary="_000_BYAPR05MB48216872F419C874D7FD517BBEC60BYAPR05MB4821namp_" MIME-Version: 1.0 X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-Network-Message-Id: 5325b868-b3ca-4df0-a0da-08d7102aaa14 X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Jul 2019 11:32:52.3154 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: mrajesh@juniper.net X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR05MB5686 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-24_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907240130 Archived-At: Subject: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 11:33:00 -0000 --_000_BYAPR05MB48216872F419C874D7FD517BBEC60BYAPR05MB4821namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I was looking at < draft-filsfils-spring-net-pgm-extension-srv6-usid-00> an= d have few comments. 1) As per section 5.2: "(A1::, FC00:0500:0700::)(B:8:D0::; SL=3D1; NH=3D4)(X, Y) When 5 receives t= he packet, 5 matches FC00:0500::/32 in its "My SID Table" and executes the uN behavior " Here longest prefix match (which is 32 bit) will be done. Once longest pref= ix match is done we will come to know it's a uSID. Now on a forwarding packet we are modifying destination address. Which is n= ot a recommended solution. Till now SRV6 only modify locally destined packe= t. Even security risks will be high, just 32 bit matching is required. 2) 7 uSID' per uSID carrier, but in CRH solution where SID is 16 bit (defau= lt case) it can support 8 SIDs (16*8). Unable to get why it is better than = CRH ? Thanks Rajesh Juniper Business Use Only --_000_BYAPR05MB48216872F419C874D7FD517BBEC60BYAPR05MB4821namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

I was looking at < draft-filsfils-spring-net-p= gm-extension-srv6-usid-00> and have  few comments. 

 

1) As per section 5.2:

 

“(A1::, FC00:0500:0700::)(B:8:D0::; SL= =3D1; NH=3D4)(X, Y) When 5 receives the packet, 5 matches FC00:0500::/32 in= its "My SID

Table" and executes the uN behavior “

 

Here longest prefix match (which is 32 bit) will be done. Once longest pre= fix match is done we will come to know it’s a uSID.=

Now on a forwarding packet we are modifying destination addre= ss. Which i= s not a recommended solution. Till now SRV6 only modify locally destined packet. Eve= n security risks will be high, just 32 bit matching is required.

 

2) 7 uSID’ per uSID carrier,= but in CRH solution where SID is 16 bit (default case) it can support 8 SIDs (16*8). Unable to get why it is better tha= n CRH ?

 

Thanks

Rajesh

 

 


Juniper Business= Use Only

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boundary="_000_SN6PR05MB5424DB647146DB55CD9B2D3EAEC60SN6PR05MB5424namp_" MIME-Version: 1.0 X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-Network-Message-Id: e8650c1a-5005-4fa3-d762-08d7102b2aa8 X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Jul 2019 11:36:27.9901 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: rbonica@juniper.net X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR05MB5343 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-24_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=507 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907240130 Archived-At: Subject: [spring] draft-ietf-spring-srv6-network-programming-01 - Effective Next Header (ENH) X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 11:36:35 -0000 --_000_SN6PR05MB5424DB647146DB55CD9B2D3EAEC60SN6PR05MB5424namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Authors, The END.DX2, END.DX2V, END.DT2U, END.DT2M, END.DX4, END.DT4, END.DX6, END.D= T6 SIDs all reference the Effective Next Header (ENH). The ENH is the first= upper-layer header beyond the IPv6 header chain. In many cases, the ENH immediately follows the SRH. In these cases, it is e= asy to identify the ENH and SID processing is easy. In other cases, the ENH does not immediately follow the SRH. In these cases= , SID processing is more difficult because the ENH cannot be identified wit= hout reading ahead to the end of the extension header chain. In one final case, when an ESP header falls between the SRH and the ENH, SI= D processing becomes very difficult because the ENH cannot be identified un= til the payload is decrypted. At very least, you should address these issues in the document. At best, yo= u should consider encoding these "destination SIDs" in IPv6 Destination opt= ions. = Ron Juniper Business Use Only --_000_SN6PR05MB5424DB647146DB55CD9B2D3EAEC60SN6PR05MB5424namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Authors,

 

The END.DX2, END.DX2V, END.DT2U, END.DT2M, END.DX4, = END.DT4, END.DX6, END.DT6 SIDs all reference the Effective Next Header (ENH= ). The ENH is the first upper-layer header beyond the IPv6 header chain.

 

In many cases, the ENH immediately follows the SRH. = In these cases, it is easy to identify the ENH and SID processing is easy.<= o:p>

 

In other cases, the ENH does not immediately follow = the SRH. In these cases, SID processing is more difficult because the ENH c= annot be identified without reading ahead to the end of the extension heade= r chain.

 

In one final case, when an ESP header falls between = the SRH and the ENH, SID processing becomes very difficult because the ENH = cannot be identified until the payload is decrypted.

 

At very least, you should address these issues in th= e document. At best, you should consider encoding these “destination = SIDs” in IPv6 Destination options.

 

        &nbs= p;            &= nbsp;            &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;    Ron


Juniper Business= Use Only

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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Authors, The END.DX2, END.DX2V, END.DT2U, END.DT2M SIDs * All carry Ethernet Payload * All required the ENH to be equal to 59 (No Next Header) In any context other than SRv6, No Next Header means that there is no next = header. In SRv6, No next header means that the next header is Ethernet. = Ron Juniper Business Use Only --_000_SN6PR05MB5424F3E1F09311E01561DA1AAEC60SN6PR05MB5424namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Authors,

 

The END.DX2, END.DX2V, END.DT2U, END.DT2M SIDs<= /o:p>

 

  • All carry Ethernet Payload
  • All required the ENH = to be equal to 59 (No Next Header)

 

In any context other than SRv6, No Next Header means= that there is no next header. In SRv6, No next header means that the next = header is Ethernet.

 

 

        &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;            &nb= sp;            =         Ron

 

 

 


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1.0 From: Kireeti Kompella Date: Wed, 24 Jul 2019 10:55:15 -0400 Message-ID: To: spring@ietf.org Content-Type: multipart/alternative; boundary="000000000000d7c9bf058e6e7f79" Archived-At: Subject: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 14:55:31 -0000 --000000000000d7c9bf058e6e7f79 Content-Type: text/plain; charset="UTF-8" Hi All, Two questions: a) should the SPRING WG work on ways to manage global SIDs of various types? b) if yes, what is the best-suited protocol to do this? I suggested DHCP; others have suggested PCEP, SRMS, LISP mapping, etc. -- Kireeti --000000000000d7c9bf058e6e7f79 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi All,

Two questions:
a) sho= uld the SPRING WG work on ways to manage global SIDs of various types?
b) if yes, what is the best-suited protocol to do this?=C2=A0 I sugge= sted DHCP; others have suggested PCEP, SRMS, LISP mapping, etc.

--
Kireeti
--000000000000d7c9bf058e6e7f79-- From nobody Wed Jul 24 08:09:55 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 95595120290 for ; Wed, 24 Jul 2019 08:09:53 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tlV7a6lXygxG for ; Wed, 24 Jul 2019 08:09:42 -0700 (PDT) Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) (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 BFF8C12029F for ; Wed, 24 Jul 2019 08:09:16 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id g2so21113518pfq.0 for ; Wed, 24 Jul 2019 08:09:16 -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=AvJUSlGqbevp6RrWs5QNPysHWYNeTzgWzOJOkrwCG4M=; b=numc88Nur5HcKHlKCRlH4X9Z+7eeUDnMfEpkVUdQZrTZdD4j/fqAC4dGrhIr0+3dND +Cnr9pPCwMZd349LFJrH93BnQQUBbIk5BjaYzBjnLZMh58jgMzDR6kqtiTOuDnBn56TG 7WB51Khf0/PCEhPPDqCGYtQdGs7TVd+H3NBIwncNP0YD2hddWeQv5ijC6HHnOzybMZU7 jkpbY7Zuy6yyMSQPwbnbiNjkUam74c7dsvhck6EjSGTeU2HkXVcmaldKtr5aQQPzK21c RtJqoRd6n9GK2V9Td739RlexkAoDchyoCQBjsMNyHqka4GoU38Ja0y0yvNKdYQpCoLco CsKw== 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=AvJUSlGqbevp6RrWs5QNPysHWYNeTzgWzOJOkrwCG4M=; b=rLEASvw8aHuDUoCr3dLMEH0NoVcgBV1lscg68cKZeEBVIMCuh3T09K4WTWukXH9AAl byoA3EvJppdXm93TJom6BfrF1vODedNkjeWTteke6gZGhSQ6eZ0hC79aabwf7T2A8+wA v9OysvollqEhokv/ba/jKfLs1sfAxqQDzax20xrURVFab8+IK9i0h6aXuq9fs+Ku6pfP Zmf8AndzbtDJxIADovfAwo5tmhtLXxoveHJMQ+n2e1YRdpBXS0UGSWNNCU0J7m8qHfX2 V2tGwgbJ6/R0z4uANoQUscknTbACoD3aVvvrt0V9AfJjLvB4gXZTlvlb9Hr0UeNLFqQO +JeQ== X-Gm-Message-State: APjAAAUE6vvBGzEUmtRfAXBI00JZ0gpWgl44/+aOWFTYjWicd5PdUp7i 9B3bC/9l8O//Ky6uOISEQ7OC078E7Gg+c3AX4Ag= X-Google-Smtp-Source: APXvYqyKsZeRnu+kZc5dJMiVH6OBrlNLAbCzRWa/JwJXdkwj6fAqT9Iu+XDfSR6GP5jwLV6BbL6mkJIWv9oFhfTNCjA= X-Received: by 2002:a63:755e:: with SMTP id f30mr82453344pgn.246.1563980955659; Wed, 24 Jul 2019 08:09:15 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Robert Raszuk Date: Wed, 24 Jul 2019 17:09:01 +0200 Message-ID: To: Kireeti Kompella Cc: SPRING WG List Content-Type: multipart/alternative; boundary="0000000000004c353c058e6eb19e" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 15:09:54 -0000 --0000000000004c353c058e6eb19e Content-Type: text/plain; charset="UTF-8" Hi Kireeti, I would like to challenge a bit your fundamental assumption which is to state that while loopbacks are very important and locally significant and warrant manual/nms provisioning SIDs are not. Well let me clarify - SIDs are NOT MPLS labels (regardless if we think local MPLS labels or global/domain wide MPLS labels). So I am of the opinion that provisioning at least node SIDs should be an NMS function. If I am building my path segment chain my abstraction to uniquely identify nodes it traverses may just use SID abstraction without need of mapping loopbacks to SIDs. Mapping is good, but too much mapping is not a feature. Perhaps for other SID types some way of mapping is OK .. and such mapping has been already implemented in SR controllers so why do we need a new mechanism here for that? Thx, R. On Wed, Jul 24, 2019 at 4:55 PM Kireeti Kompella wrote: > Hi All, > > Two questions: > a) should the SPRING WG work on ways to manage global SIDs of various > types? > b) if yes, what is the best-suited protocol to do this? I suggested DHCP; > others have suggested PCEP, SRMS, LISP mapping, etc. > > -- > Kireeti > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --0000000000004c353c058e6eb19e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Kireeti,
I would like to challenge a bit your fundamental = assumption which is to state that while loopbacks are very important and lo= cally significant and warrant manual/nms provisioning SIDs are not.=C2=A0

Well let me clarify - S= IDs are NOT MPLS labels (regardless if we think local MPLS labels or global= /domain wide MPLS labels). So I am of the opinion that provisioning at leas= t node SIDs should be an NMS function.=C2=A0

If I am building my path segment chain my abstractio= n to uniquely identify nodes it traverses may just use SID abstraction with= out need of mapping loopbacks to SIDs. Mapping is good, but too much mappin= g is not a feature.=C2=A0

Perhaps for other SID types some way of mapping is OK .. and such mappi= ng has been already implemented in SR controllers so why do we need a new m= echanism here for that?=C2=A0

Thx,
R.

On Wed, Jul 24, 2019 at 4:55 = PM Kireeti Kompella <kiree= ti.kompella@gmail.com> wrote:
Hi All,

Two questi= ons:
a) should the SPRING WG work on ways to manage global SIDs o= f various types?
b) if yes, what is the best-suited protocol to d= o this?=C2=A0 I suggested DHCP; others have suggested PCEP, SRMS, LISP mapp= ing, etc.

--
Kireeti
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear colleagues, I have a couple of questions about the life span of the Path Segment. Suppose that some entity has computed and instantiated an SR LP that follo= ws a specific path from the ingress node to the egress node across a sing= le IGP domain. This path is expressed as a sequence of valid IGP Segments = (e.g., Node and/or Adjacency segments) . Suppose also that a Path Segment has been allocated by the egress node for= this path, and the ingress node is aware of this and inserts the label ac= ting as the SID for the Path segments immediately after the last SID of th= e path. Now my questions: 1. What happens to the Path Segment when one of the IGP segments def= ining the original path fails? a. To the best of my understanding the path itself becomes invalid b. Will the Path Segment that identifies the now invalid path be ret= ained indefinitely, or would it be invalidated as well and the label actin= g as its SID released? 2. Suppose that the entity that has computed and instantiated the or= iginal path re-computes it and instantiate a new valid path. a. Should the new path (that replaces the invalidated original one) = be allocated with the same Path Segment as the original path, or should a = new Path Segment be allocated for it? b. If the Path Segment allocated for the invalidated path is release= d (see (1b) above), can the label that identified it be re-used as the Pat= h Segment ID immediately, or only after some delay? >From my POV the answers to these questions do not depend on the actual met= hod by which the Path Segments are allocated and propagated from the egres= s node to the ingress one. And while my questions explicitly mention IGP Segments that define the SR = LSP for which the Path Segment is allocated, the desired behavior should n= ot depend on the type of segments used in the definition of the path. Your feedback would be highly appreciated. Regards, and lots of thanks in advance, Sasha Office: +972-39266302 Cell: +972-549266302 Email: Alexander.Vainshtein@ecitele.com __________________________________________________________________________= _ This e-mail message is intended for the recipient only and contains inform= ation which is=20 CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece= ived this=20 transmission in error, please inform us by e-mail, phone or fax, and then = delete the original=20 and all copies thereof. __________________________________________________________________________= _ --_000_AM0PR03MB3828608D66CBCE8978294BC79DC60AM0PR03MB3828eurp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dear colleagues,

I have a couple of questions about the life span of= the Path Segment.

 

Suppose that some entity has computed and instantia= ted an SR LP that follows a specific path from the ingress node to the&nbs= p; egress node across a single IGP domain. This path is expressed as a seq= uence of valid IGP Segments (e.g., Node and/or Adjacency segments) .

Suppose also that a Path Segment has been allocated= by the egress node for this path, and the ingress node is aware of this a= nd inserts the label acting as the SID for the Path segments immediately a= fter the last SID of the path.

 

Now my questions:

1.    &nbs= p;  What happens to the Path = Segment when one of the IGP segments defining the original path fails?

a.       To the best of my underst= anding the path itself becomes invalid

b.       Will the Path Segment tha= t identifies the now invalid path be retained indefinitely, or would it be= invalidated as well and the label acting as its SID released?<= /p>

2.    &nbs= p;  Suppose that the entity t= hat has computed and instantiated the original path re-computes it and ins= tantiate a new valid path.

a.       Should the new path (that= replaces the invalidated original one) be allocated with the same Path Se= gment as the original path, or should a new Path Segment be allocated for = it?

b.       If the Path Segment alloc= ated for the invalidated path is released (see (1b) above), can the label = that identified it be re-used as the Path Segment ID immediately, or only = after some delay?

 

From my POV the answers to these questions do not d= epend on the actual method by which the Path Segments are allocated and pr= opagated from the egress node to the ingress one.

And while my questions explicitly mention IGP Segme= nts that define the SR LSP for which the Path Segment is allocated, the de= sired behavior should not depend on the type of segments used in the defin= ition of the path.

 

Your feedback would be highly appreciated.

 

Regards, and lots of thanks in advance,<= /p>

Sasha

 

Office: +972-39266302

Cell:      +972-549266= 302

Email:   Alexander.Vainshtein@ecitele.com=

 


__________________________________________________________________________= _

This e-mail message is intended for the recipient only and contains inform= ation which is
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece= ived this
transmission in error, please inform us by e-mail, phone or fax, and then = delete the original
and all copies thereof.
__________________________________________________________________________= _
--_000_AM0PR03MB3828608D66CBCE8978294BC79DC60AM0PR03MB3828eurp_-- From nobody Wed Jul 24 08:36:33 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 459A31202AE for ; Wed, 24 Jul 2019 08:36:30 -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 EQlfBurRDS_v for ; Wed, 24 Jul 2019 08:36:28 -0700 (PDT) Received: from mail-yw1-xc2c.google.com (mail-yw1-xc2c.google.com [IPv6:2607:f8b0:4864:20::c2c]) (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 B2116120072 for ; Wed, 24 Jul 2019 08:36:28 -0700 (PDT) Received: by mail-yw1-xc2c.google.com with SMTP id x74so265710ywx.6 for ; Wed, 24 Jul 2019 08:36:28 -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=ahyKax8KhdDTLoD4fsjrN94GJM689QG0GheYZFNXMtk=; b=Ruf9fuk5LIe3IljttUh5KPm2M2V4WENg52z7E94/2Zq6+fo91XUZ5p75na18uygCxe SGgLXPxZFhHOnyJ26MXf+RHMBD2Omp2M1v0cJsTYYj9hd6qNHs/aG/+xVU6Esst3n3Wx HLkPVe1XtkGn/dlE8S917ZqZc+MAuZwyXCWbZHGfj/QRL20BDomXR0BMLSNcjQdOcUFw FwDRq0xMLxMYetUhWB82yMz+Q67EpSDgVemiTY2tXh62d6Ogy2Qoc2jyqMvqvZEswzOV RCSAKTS3x/Al/RwbriFCGOanLCC/bECIQ45oo5fyHULskwoBFOVgJzeoMcXcgXA0CXtr I0QQ== 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=ahyKax8KhdDTLoD4fsjrN94GJM689QG0GheYZFNXMtk=; b=q67UqxRTSILQqrMdm3xYD3yUIkTivKJe09qQt2TRmCMxzN4Vv3+OenTwfjsCnAc9vq utrjjtGfHpjF8XMtvjcpGaMMx1PIDRJ1xoAnEpINx8iIJqA2g8yhiqQxgrRGD8Oc4iXH E525fhI5r6GZNMoe4dwDSuZRJeTOLBcKVN/os7lcH0K/wdPwOrcaLuGVw8zPjmfNQuSg a/6zcj2F6koP9lbg4AASX6YJZWrGbrrcMVK3fygMwo1wFh7vteqRtqzyMKfdmIvRvdE8 kgpZ8v4JI9BOd5UxqzokqZGWz7Vno7hXHEZqXvlHbQa05Ww0yzu3Hw6OMItF/DK8m8Fb uk3g== X-Gm-Message-State: APjAAAVRJFfuhJ7omkjy7R4ay/3YhVPjkmekNYslMNdyHpoCVJP5Y3db Th8PUaRYldjxQk0pw8k4Jhij8d2a1FC4N2rJMkU= X-Google-Smtp-Source: APXvYqyvVCFRgJxo1lqNxlXf3mhzMK5i1NP8pFhhqzZKuW9KRte98OXavEO0JRekhH6cNfZhBVeERH7i2hGRgWfAEao= X-Received: by 2002:a81:1a4e:: with SMTP id a75mr49538539ywa.310.1563982587956; Wed, 24 Jul 2019 08:36:27 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Kireeti Kompella Date: Wed, 24 Jul 2019 11:36:16 -0400 Message-ID: To: Robert Raszuk Cc: SPRING WG List Content-Type: multipart/alternative; boundary="00000000000097141f058e6f12c2" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 15:36:31 -0000 --00000000000097141f058e6f12c2 Content-Type: text/plain; charset="UTF-8" Hi Robert, On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote: > Hi Kireeti, > > I would like to challenge a bit your fundamental assumption which is to > state that while loopbacks are very important and locally significant and > warrant manual/nms provisioning SIDs are not. > Actually, what I said at the mike is that I believe that both loopbacks and global SIDs should be managed by DHCP. But that's a distraction; the point at hand is whether global SIDs should be managed "manually" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic). You say the former ... thanks for the feedback. -- Kireeti --00000000000097141f058e6f12c2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Robert,

On Wed, Jul 24, 2019 at 11:09 AM Robert Ras= zuk <rraszuk@gmail.com> wrot= e:
Hi Kireeti,

I would like to= challenge a bit your fundamental assumption which is to state that while l= oopbacks are very important and locally significant and warrant manual/nms = provisioning SIDs are not.=C2=A0

Actually, what I said at the mike is that I believe that both loopbacks a= nd global SIDs should be managed by DHCP.=C2=A0 But that's a distractio= n; the point at hand is whether global SIDs should be managed "manuall= y" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHC= P) (i.e., dynamic).=C2=A0 You say the former ... thanks for the feedback.

=C2=A0--=C2=A0
Kireeti
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(amavisd-new); dkim=pass (2048-bit key) header.d=lapishills-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lGF5fXgxhse1 for ; Wed, 24 Jul 2019 09:20:10 -0700 (PDT) Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) (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 B1D3D12035B for ; Wed, 24 Jul 2019 09:20:09 -0700 (PDT) Received: by mail-wm1-x32a.google.com with SMTP id w9so33820327wmd.1 for ; Wed, 24 Jul 2019 09:20:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lapishills-com.20150623.gappssmtp.com; s=20150623; h=from:content-transfer-encoding:mime-version:date:subject:message-id :to; bh=8LvGGs/26Dq9SgmKWTuzcDjwDHr1OhB7XzAs+x9TOdo=; b=aK0F68BJ/1z43AOqYIvN0HU/HrG2I+lB2eY5aezYz+Ub3Hsc9Gyup96xE/BXin4uad 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X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 16:20:19 -0000 Hi All, in todays SPRING session we have heard concerns about MTU efficiency in certain use cases involving SRv6. It is true that using 128 bit SRv6 SIDs trades scalability and flexibility against MTU overhead. There will certainly be use cases where the additional overhead may be justified. For other uses cases where MTU efficiency is a major concern the answer within the SRv6 framework is SRv6 uSID. Another proposal to address the MTU efficiency problem today advertised itself as basically using the same semantics as MPLS encapsulated in IPv6 and also noted that SRv6 deviates from legacy MPLS regarding label semantics. This is exactly the point. Not being dependent on the legacy MPLS label binding semantics in SRv6 is a big advantage. And this advantage is carried forward in SRv6 uSID as well. SRv6 uSID addresses the problem of MTU efficiency while avoiding to fall back to MPLS label binding semantics. No separate mapping table is required to be able to forward uSID. It is also not true that uSID inflates the IGP and/or FIB tables more than other approaches. A uSID is advertised just like other SRv6 SIDs, although the prefix length will typically be much shorter. The fact that no extra label mapping table is required contributes to improved control and data plane efficiency and provides excellent forwarding ASIC efficiency, especially for low-FIB and legacy systems. Cheers Dirk From nobody Wed Jul 24 09:38:16 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8B81B12025F for ; Wed, 24 Jul 2019 09:38:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CGujqqt3sgWi for ; Wed, 24 Jul 2019 09:38:12 -0700 (PDT) Received: from mail-qk1-x730.google.com (mail-qk1-x730.google.com [IPv6:2607:f8b0:4864:20::730]) (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 46739120059 for ; Wed, 24 Jul 2019 09:38:12 -0700 (PDT) Received: by mail-qk1-x730.google.com with SMTP id m14so8547693qka.10 for ; Wed, 24 Jul 2019 09:38:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=vlrzUs3DeMmYCYtsNpCRmfmGXw0IIuxIwEv/mgKh6tI=; b=GLs5r0Pq2Hman1ru+I9Ctj02PmxPOAXm8A1szC7nMUMSz98zsmEz8mnN49JhbDVojf 04aceO7rkW2VbfEMBWRwJqy+f5o8nYxHKn9nl+SusMHl+PJx3Wc6HcF0cdBp1VeGS1kj vSkyKr8YoYTZNmLYxwth3LfGbMh8eU2ThITCkzwU6+iKUEQ2Uay9SEWwSl9hQ/vcwyac wACS4o/4D7V2SfmJwbTXrcK1W9F6/XzhY6CwYJ0fcHJB0bufCSVJuGQxQPBfGbEb+MrI goaSoq3YgLo3KAEdUBDULJ/MYj3lwek7agbOml9Mz7T2ewkM52W361Tt8I+zMRqI5bAC 9NcQ== 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=vlrzUs3DeMmYCYtsNpCRmfmGXw0IIuxIwEv/mgKh6tI=; b=UUfJhZNNax7eN4n3Yv7vtyCXbI/LI1LQdnOggO8/dyd0EGePpr95SNrkrELA0WLi1W dWkAbBjGOjKZoefrMq/S0zY6eiFJP5kFqefafEjzQdyGxybraadRyJgI8hXK1+cl10bl d4idaw4xNE8+7BD2O3nhLCsglzTjZ/AbDMVAN9zqemuSj0kAfQbpA/akilNeUGEf5tXG 99wDMRnxezd/qnQJFiGwziLEH11XjZemlKibvGfl6SNcpOkggMK/7nlTXrMedX9Vd08r LoGORwaU8DH46Y6K+TVA7cckpAe4Srl9QHGY7OTQA8yR9+CXImZWtBsz0t/fBB5O3Ks1 8v2g== X-Gm-Message-State: APjAAAWHDOYwHPjovR/ztfTpFsdA4RrZOibke++39fQCIkKY13w1fPyu IpniRv2FBzy2//92hRdgSSWsXuyhqK6fVslHxSk= X-Google-Smtp-Source: APXvYqz4RQob4CQjRTd3hrXFYEZzyDR447+3/7stEbT/ki35xDK0bGaNO3VeXqUnTnpTlM9OYZRCAgpI1+aHqUON/pI= X-Received: by 2002:a05:620a:13f9:: with SMTP id h25mr49926700qkl.283.1563986291250; Wed, 24 Jul 2019 09:38:11 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: "Andrew G. Malis" Date: Wed, 24 Jul 2019 12:38:00 -0400 Message-ID: To: Alexander Vainshtein Cc: Kireeti Kompella , Robert Raszuk , SPRING WG List Content-Type: multipart/alternative; boundary="000000000000530e4a058e6fefdd" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 16:38:15 -0000 --000000000000530e4a058e6fefdd Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sasha, Most "normal" DHCP servers require manual configuration of some sort if you want to guarantee persistence of the assigned IP address (i.e. "static" DHCP). So we're back to "manual" management, even if the results of the manual management are conveyed by a dynamic protocol. Cheers, Andy On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein < Alexander.Vainshtein@ecitele.com> wrote: > Robert, Kireeti and all, > > I think that both loopbacks and their association with SIDs should be kep= t > *persistent*. > > > > Whether such persistency is provided by the means of static configuration= , > or by the means that are external to some dynamic protocol is a different > question. > > E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office computer) ma= y think that it > obtains a dynamic IP address in the company network from the DHCP server > every time I turn it on, but the DHCP server actually takes care to assig= n > to it the same IP address every time. > > > > Does this help in any way? > > > > Regards, > > Sasha > > > > Office: +972-39266302 > > Cell: +972-549266302 > > Email: Alexander.Vainshtein@ecitele.com > > > > *From:* spring *On Behalf Of *Kireeti Kompella > *Sent:* Wednesday, July 24, 2019 6:36 PM > *To:* Robert Raszuk > *Cc:* SPRING WG List > *Subject:* Re: [spring] Managing "global" SIDs > > > > Hi Robert, > > > > On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote: > > Hi Kireeti, > > > > I would like to challenge a bit your fundamental assumption which is to > state that while loopbacks are very important and locally significant and > warrant manual/nms provisioning SIDs are not. > > > > Actually, what I said at the mike is that I believe that both loopbacks > and global SIDs should be managed by DHCP. But that's a distraction; the > point at hand is whether global SIDs should be managed "manually" (or by > NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., > dynamic). You say the former ... thanks for the feedback. > > > > -- > > Kireeti > > _________________________________________________________________________= __ > > This e-mail message is intended for the recipient only and contains > information which is > CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have > received this > transmission in error, please inform us by e-mail, phone or fax, and then > delete the original > and all copies thereof. > _________________________________________________________________________= __ > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --000000000000530e4a058e6fefdd Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Sasha,

Most "normal" DHCP ser= vers require manual configuration=C2=A0of some sort=C2=A0if you want to gua= rantee persistence of the assigned IP address (i.e. "static" DHCP= ). So we're back to "manual" management, even if the results = of the manual management are conveyed by a dynamic protocol.

=
Cheers,
Andy


On Wed, Jul 24, 2019= at 11:53 AM Alexander Vainshtein <Alexander.Vainshtein@ecitele.com> wrote:

Robert, Kireeti and all,

I think that both loopbacks and their associ= ation with SIDs should be kept persistent.

=C2=A0

Whether such persistency is provided by the = means of static configuration, or by the means that are external to some dy= namic protocol is a different question.

E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client= (like my office computer) may think that it obtains a dynamic IP address i= n the company network from the DHCP server every time I turn it on, but the DHCP server actually takes care to assign to it the sa= me IP address every time.

=C2=A0

Does this help in any way?

=C2=A0

Regards,

Sasha

=C2=A0

Office: +972-39266302

Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549= 266302

Email:=C2=A0=C2=A0 Alexander.Vainshtein@ecitele.c= om

=C2=A0

From: spring <spring-bounces@ietf.org> On Behalf Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk@gmail.com>
Cc: SPRING WG List <spring@ietf.org>
Subject: Re: [spring] Managing "global" SIDs=

=C2=A0

Hi Robert,

=C2=A0

On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk <<= a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com= > wrote:

Hi Kire= eti,

= =C2=A0

I would= like to challenge a bit your fundamental assumption which is to state that= while loopbacks are very important and locally significant and warrant man= ual/nms provisioning SIDs are not.=C2=A0

=C2=A0

Actually, what I said at the mike is that I believe = that both loopbacks and global SIDs should be managed by DHCP.=C2=A0 But th= at's a distraction; the point at hand is whether global SIDs should be = managed "manually" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic).=C2=A0 You say= the former ... thanks for the feedback.

=C2=A0

=C2=A0--=C2=A0

Kireeti


___________________________________________________________________________=

This e-mail message is intended for the recipient only and contains informa= tion which is
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have recei= ved this
transmission in error, please inform us by e-mail, phone or fax, and then d= elete the original
and all copies thereof.
___________________________________________________________________________=
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
--000000000000530e4a058e6fefdd-- From nobody Wed Jul 24 10:54:36 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5001C1202A5 for ; Wed, 24 Jul 2019 10:54:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Uf6pYUYjvt2a for ; Wed, 24 Jul 2019 10:54:31 -0700 (PDT) Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) (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 5E06C120059 for ; Wed, 24 Jul 2019 10:54:31 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id r7so21322290pfl.3 for ; Wed, 24 Jul 2019 10:54:31 -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=Cz8m8qgqT+p6knrwomi7mb/MAR2ly5TlxJFmeJmU4WA=; b=YcBIHjjhyKmvSHSjS0RjiknuYCdZVDSVtuSBMkuszMRFP7WW3mVbBRI6l8u3h1gEMN GJRQR2WrvGJ4vbI0pf5hrGJQI3fcS+sk7+Ar+tl33OYLgWpeZeV6ksR1cFIGLsCIWo/C 0gcJ9XXyOjCApN+5zyLb9nv1ZTQNuS9uont28+ZA8rx2TjeAouQngQmdPMRZmprxbh7B 0qMHZPztmKn6TLKa/yNzfwjp6qgHmYXezU0tZIUxQgxUSgFK1yAxfLsE6gNZRHDF00JG OuJXglPquO/3/jc81/e41apamAXSQo0rG6teQd1YIV+A1enmze9cEUtbrDz8Hx2VktSY RGLw== 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=Cz8m8qgqT+p6knrwomi7mb/MAR2ly5TlxJFmeJmU4WA=; b=RRQ6wI9GXBtDAHiGdBVLHbhr8GVTq1KmHJ7OoRXa9K71dwF3w01TYNpsRe9+yZ5R5g d1BxThBFscUwWWIil+g/9OtaF6eXLyqbgrcUDIYY6rloN/tHXqusOw1Dv8JJVD4k10DE km1r1onwMHaHCSB38WP66Qo6XWTp/fYkEjcuvMchxz1ak9xN/b6n3J5+nANehjx0bQqn 6YHgp3cwuUJ0KkhY1JAifMMuAi3a3JpKN73po81ixdbkYAM7vytY2z9MWBzWDhR2LayE 3mcekifiXo7tF8lwfjFqRWPwYuBWXNfwEbRc8dq3a7+FIrKhdaGTc+MhpESm4lP4H75F uqlw== X-Gm-Message-State: APjAAAWTgeoLzjuRzZETQxSbf1Q/uH9bWx4ZL9z7KYEH3lDwTCc17eua c/sy7Fy6kuhA4gsjDI/5a9K/mfp5FQ5jdFEgXk0= X-Google-Smtp-Source: APXvYqzDpmx1lMe4ZKPCqnZuIXAfqLIHjc84WJ2ua7GUh9BWdx6P368jk8vurHWgcYZ+5X5cXLbPHqAyK2GJ53Xp1r8= X-Received: by 2002:aa7:8193:: with SMTP id g19mr12169937pfi.16.1563990870479; Wed, 24 Jul 2019 10:54:30 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Robert Raszuk Date: Wed, 24 Jul 2019 19:54:21 +0200 Message-ID: To: "Andrew G. Malis" Cc: Alexander Vainshtein , Kireeti Kompella , SPRING WG List Content-Type: multipart/alternative; boundary="0000000000004458ef058e710011" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 17:54:35 -0000 --0000000000004458ef058e710011 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable So if you have to manually configure it what is the point to introduce another layer of dependency ? Moreover let's please keep reality check in mind where in a lot of networks DHCP servers are managed by application folks which is completely different org then networking people. Now good luck going and telling server folks what is SID and that they need to program static bindings for DHCP management system every time such need arise in network group :) Cheers, R. On Wed, Jul 24, 2019 at 6:38 PM Andrew G. Malis wrote: > Sasha, > > Most "normal" DHCP servers require manual configuration of some sort if > you want to guarantee persistence of the assigned IP address (i.e. "stati= c" > DHCP). So we're back to "manual" management, even if the results of the > manual management are conveyed by a dynamic protocol. > > Cheers, > Andy > > > On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein < > Alexander.Vainshtein@ecitele.com> wrote: > >> Robert, Kireeti and all, >> >> I think that both loopbacks and their association with SIDs should be >> kept *persistent*. >> >> >> >> Whether such persistency is provided by the means of static >> configuration, or by the means that are external to some dynamic protoco= l >> is a different question. >> >> E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office computer) m= ay think that it >> obtains a dynamic IP address in the company network from the DHCP server >> every time I turn it on, but the DHCP server actually takes care to assi= gn >> to it the same IP address every time. >> >> >> >> Does this help in any way? >> >> >> >> Regards, >> >> Sasha >> >> >> >> Office: +972-39266302 >> >> Cell: +972-549266302 >> >> Email: Alexander.Vainshtein@ecitele.com >> >> >> >> *From:* spring *On Behalf Of *Kireeti Kompella >> *Sent:* Wednesday, July 24, 2019 6:36 PM >> *To:* Robert Raszuk >> *Cc:* SPRING WG List >> *Subject:* Re: [spring] Managing "global" SIDs >> >> >> >> Hi Robert, >> >> >> >> On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote= : >> >> Hi Kireeti, >> >> >> >> I would like to challenge a bit your fundamental assumption which is to >> state that while loopbacks are very important and locally significant an= d >> warrant manual/nms provisioning SIDs are not. >> >> >> >> Actually, what I said at the mike is that I believe that both loopbacks >> and global SIDs should be managed by DHCP. But that's a distraction; th= e >> point at hand is whether global SIDs should be managed "manually" (or by >> NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., >> dynamic). You say the former ... thanks for the feedback. >> >> >> >> -- >> >> Kireeti >> >> >> ________________________________________________________________________= ___ >> >> This e-mail message is intended for the recipient only and contains >> information which is >> CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have >> received this >> transmission in error, please inform us by e-mail, phone or fax, and the= n >> delete the original >> and all copies thereof. >> >> ________________________________________________________________________= ___ >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring >> > --0000000000004458ef058e710011 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
So if you have to manually configure it= what is the point to introduce another layer of dependency ?=C2=A0

Moreover let's please kee= p reality check in mind where in a lot of networks DHCP servers are managed= by application folks which is completely different org then networking peo= ple.=C2=A0 Now good luck going and telling server folks what is SID and tha= t they need to program static bindings for DHCP management system every tim= e such need arise in network group :)=C2=A0=C2=A0
<= br>
Cheers,
R.
<= br>
On Wed,= Jul 24, 2019 at 6:38 PM Andrew G. Malis <agmalis@gmail.com> wrote:
Sasha,

Most &qu= ot;normal" DHCP servers require manual configuration=C2=A0of some sort= =C2=A0if you want to guarantee persistence of the assigned IP address (i.e.= "static" DHCP). So we're back to "manual" manageme= nt, even if the results of the manual management are conveyed by a dynamic = protocol.

Cheers,
Andy


On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein <Alexander.Vainshtei= n@ecitele.com> wrote:

Robert, Kireeti and all,

I think that both loopbacks and their associ= ation with SIDs should be kept persistent.

=C2=A0

Whether such persistency is provided by the = means of static configuration, or by the means that are external to some dy= namic protocol is a different question.

E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client= (like my office computer) may think that it obtains a dynamic IP address i= n the company network from the DHCP server every time I turn it on, but the DHCP server actually takes care to assign to it the sa= me IP address every time.

=C2=A0

Does this help in any way?

=C2=A0

Regards,

Sasha

=C2=A0

Office: +972-39266302

Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549= 266302

Email:=C2=A0=C2=A0 Alexander.Vainshtein@ecitele.c= om

=C2=A0

From: spring <spring-bounces@ietf.org> On Behalf Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk@gmail.com>
Cc: SPRING WG List <spring@ietf.org>
Subject: Re: [spring] Managing "global" SIDs=

=C2=A0

Hi Robert,

=C2=A0

On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk <<= a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com= > wrote:

Hi Kire= eti,

= =C2=A0

I would= like to challenge a bit your fundamental assumption which is to state that= while loopbacks are very important and locally significant and warrant man= ual/nms provisioning SIDs are not.=C2=A0

=C2=A0

Actually, what I said at the mike is that I believe = that both loopbacks and global SIDs should be managed by DHCP.=C2=A0 But th= at's a distraction; the point at hand is whether global SIDs should be = managed "manually" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic).=C2=A0 You say= the former ... thanks for the feedback.

=C2=A0

=C2=A0--=C2=A0

Kireeti


___________________________________________________________________________=

This e-mail message is intended for the recipient only and contains informa= tion which is
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have recei= ved this
transmission in error, please inform us by e-mail, phone or fax, and then d= elete the original
and all copies thereof.
___________________________________________________________________________=
_______________________________________________
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--0000000000004458ef058e710011-- From nobody Wed Jul 24 10:55:58 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6115012031E for ; Wed, 24 Jul 2019 10:55:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id aZ0MX-XYE1b2 for ; Wed, 24 Jul 2019 10:55:54 -0700 (PDT) Received: from mail-io1-xd35.google.com (mail-io1-xd35.google.com [IPv6:2607:f8b0:4864:20::d35]) (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 DD8AE1202A5 for ; Wed, 24 Jul 2019 10:55:53 -0700 (PDT) Received: by mail-io1-xd35.google.com with SMTP id k20so91420523ios.10 for ; Wed, 24 Jul 2019 10:55:53 -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=lQeiSkAwghOvbx1Nh54hMx2EFldZrHe61Oi/w38wp6M=; b=VLS1zsA/88VAdLTOwUMqpOpoPeKDUAiI/J20ZQRPtuE7c0uvOgBOYWIKuD9hXwbumJ py//nSGIhkpD1KHAmHLMYFyDexDj06YEBrRTMLDCag8/z1pvZ9YB/5K3WdJyV0mZ+g5y +6Yy+z4pGMB5j/taSgpVmITUbjqWMWKAnSfSIcsKUJ0X7N58K4LGiN8ttupPoX/zXrm0 TjItEAzh24GdRLIYgdlZlGJOaQL8566+7abWlH/cYczmJuCrWVteyozL4DSi6kgBkpHD GmyZ5WbSRDw8eoGrBsqpjz5LCgx/mNJUOfEhqRzTkaefTiLCxAS9aXrlqEYh9Rf1FNg4 7qTQ== 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=lQeiSkAwghOvbx1Nh54hMx2EFldZrHe61Oi/w38wp6M=; b=pXTjo9rFhS0WzUR9Tpd1HRO01A648kw7hcaJ0fFCBxGpJov+huQFNFmD5h1mOF6tC9 qnU9G0WedLPH/aYHR8D6E+AYGitXcn6KlUF9PXjrZMkyurqji9YEu5zOhkbuGdUNEPzY NvG16QMlIBpAIskEYGorQH334P69dEezXqMOI6pt2AK5iEGOBBV+I1pcxdMSIs6lO7aW 0qZGVgQAWzIZUZD8VKOfEfbx7O+Pw7t48enYHvE1quZ6AOk2DfIqsSJP2RZ0VOImsubr N3+4+EMneJppPRO2FK/ZIICrjTsA9byoEzqSubkndecDXaG7R40QCZazRkA7JUubdFtb kZAg== X-Gm-Message-State: APjAAAWEk+z/MfvUmbcMpkb9uRtIcJATjtZYMRX1kf/bBlxpPq4nqz0p AbJNKHBHL5hW/8XOz13TOZ8ITMYeYAg3vv0KSr9bIJZU X-Google-Smtp-Source: APXvYqzIJqYNil2zEo85WOzeY2omKPxP5RfMSZqzGxUnrF9GfahxQ9sLzingawg4IUt5RV5QmlUkJuEvDuaNCQbsIwk= X-Received: by 2002:a6b:c98c:: with SMTP id z134mr39206257iof.276.1563990953017; Wed, 24 Jul 2019 10:55:53 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dhruv Dhody Date: Wed, 24 Jul 2019 13:55:41 -0400 Message-ID: To: Kireeti Kompella Cc: Robert Raszuk , SPRING WG List Content-Type: multipart/alternative; boundary="0000000000002fc777058e7105c6" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 17:55:57 -0000 --0000000000002fc777058e7105c6 Content-Type: text/plain; charset="UTF-8" Hi Kireeti, Just as a data point for comparison, the drafts in PCE WG were discussed in the past. As part of use of PCE as a central controller PCECC (RFC 8283) work items - https://tools.ietf.org/html/draft-zhao-pce-pcep-extension-pce-controller-sr-05 https://tools.ietf.org/html/draft-dhody-pce-pcep-extension-pce-controller-srv6-01 The focus was on the controller to instruct the node with the SID allocations when the controller learns about the existence of node and the PCEP session is in place. We could also evaluate a request/reply from the node as well if that approach is required. Thanks! Dhruv On Wed, Jul 24, 2019 at 11:36 AM Kireeti Kompella < kireeti.kompella@gmail.com> wrote: > > Hi Robert, > > On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote: >> >> Hi Kireeti, >> >> I would like to challenge a bit your fundamental assumption which is to state that while loopbacks are very important and locally significant and warrant manual/nms provisioning SIDs are not. > > > Actually, what I said at the mike is that I believe that both loopbacks and global SIDs should be managed by DHCP. But that's a distraction; the point at hand is whether global SIDs should be managed "manually" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic). You say the former ... thanks for the feedback. > > -- > Kireeti > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring --0000000000002fc777058e7105c6 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Kireeti,

Just as a data point for comparison, the drafts in PCE WG were discussed in= the past. As part of use of PCE as a central controller PCECC (RFC 8283) w= ork items -

https://tools.ietf.org= /html/draft-zhao-pce-pcep-extension-pce-controller-sr-05
https://tools.ietf.= org/html/draft-dhody-pce-pcep-extension-pce-controller-srv6-01

The focus was on the controller to instruct the node with the SID allocatio= ns when the controller learns about the existence of node and the PCEP sess= ion is in place. We could also evaluate a request/reply from the node as we= ll if that approach is required.=C2=A0

Thanks!
Dhruv

On Wed, Jul 24, 2019 at 11:36 AM Kireeti Kompella <kireeti.kompella@gmail.com&g= t; wrote:
>
> Hi Robert,
>
> On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk <rraszuk@gmail.com> wrote:
>>
>> Hi Kireeti,
>>
>> I would like to challenge a bit your fundamental assumption which = is to state that while loopbacks are very important and locally significant= and warrant manual/nms provisioning SIDs are not.
>
>
> Actually, what I said at the mike is that I believe that both loopback= s and global SIDs should be managed by DHCP.=C2=A0 But that's a distrac= tion; the point at hand is whether global SIDs should be managed "manu= ally" (or by NMS or equivalent) (i.e., static), or by a protocol (say = DHCP) (i.e., dynamic).=C2=A0 You say the former ... thanks for the feedback= .
>
>=C2=A0 --
> Kireeti
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
--0000000000002fc777058e7105c6-- From nobody Wed Jul 24 11:02:17 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 205A112028E for ; Wed, 24 Jul 2019 11:02:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jEltJHlpcZyx for ; Wed, 24 Jul 2019 11:02:13 -0700 (PDT) Received: from mail-qt1-x82f.google.com (mail-qt1-x82f.google.com [IPv6:2607:f8b0:4864:20::82f]) (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 F055812015B for ; Wed, 24 Jul 2019 11:02:12 -0700 (PDT) Received: by mail-qt1-x82f.google.com with SMTP id w17so2064752qto.10 for ; Wed, 24 Jul 2019 11:02:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version; bh=O75V/mqVdvwqo21WfKDer3ZATUpKrkiXssANZ1Rp/gU=; b=JMymrgvhHWlhHYESrxkmVqCx2lboLCHGm/EOXVc9FNntd8MVVe4jjjrmFnxQ6MdZI1 UIlI07SNZvyF7PIJa4FwBkNuPQFtppZzIcSRsHdcypzzgW4Xyvift+jZya4OV24eI0e6 FkE/1IMWgEZPBMDrVYd5bgaaf1cR1aoy6zoPOG6di8TeqZaWvG49KjUG047bkVA/HS4t DFp1LONicHPHWza1IiKl5mrv43/9yAZ78N2Kk4OxFw6eJgCTLdbRBaXK7wmA2ZfH8tmX ArZ8Rj2SVTZUoGeCkK9c+bJQlbTyfMG5oH8dxYFTbFS/JxN5nHewl2W7YfBml2Vkxp5R hcjg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version; bh=O75V/mqVdvwqo21WfKDer3ZATUpKrkiXssANZ1Rp/gU=; b=W1NyrhWdj6ZDEWnpUW+/jnjvD8BwDxlchyGRPskSzCpa4T4190LorsvoqEUZStsxi/ NpvbkpULQ/RyUHLK+yWyUnxc81egEqLMleSKH7AviWt8Z2NqN8tHr+YROBdBYDh5wdC+ RwWBgBZjvnvtH2ixNHfChfbUbl4nYHlcsZ1XGItesRjGPJFJCaKSn0ifvf5sOXA2811l Jjbo/vjUQKrhzeX8Tt3cSs9ot7V6MixJdvBN+Oz5xnirLlc1BEgQ3/GnFuXeC7ziGJvO hlNnJmYZ2E+2cwAvJtN60m7Jw8Qtif0CvyCFmU0i30kyXssMjRByQ+jMISpr6+GSl3QC C3wQ== X-Gm-Message-State: APjAAAWgXSQCMne2sgB/RwlL8Xz/UW1VhJInIRClTXJggyq0jA9uuMsZ HAexIUvaEyt+HOlaYB4A+NQ= X-Google-Smtp-Source: APXvYqzfJPPgrXb8XtGWHtARFk0w4mSetG0iQJGr1JoXO8dOxy/DBFvnE4PRNn7kp2wv6SntJazMnA== X-Received: by 2002:a0c:e703:: with SMTP id d3mr57649533qvn.194.1563991332070; Wed, 24 Jul 2019 11:02:12 -0700 (PDT) Received: from [2001:67c:1232:144:2083:8e8c:ff7f::] ([2001:67c:1232:144:d98:cf9c:3dd2:aa26]) by smtp.gmail.com with ESMTPSA id y2sm21159489qkj.8.2019.07.24.11.02.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 11:02:11 -0700 (PDT) Date: Wed, 24 Jul 2019 14:02:02 -0400 From: Jeff Tantsura To: Alexander Vainshtein , "Andrew G. Malis" Cc: SPRING WG List , Kireeti Kompella , Robert Raszuk Message-ID: In-Reply-To: References: X-Readdle-Message-ID: d44f23a9-4a6c-49fa-be2d-58ecad58d8e6@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d389d1f_1a27709e_12dc6" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 18:02:16 -0000 --5d389d1f_1a27709e_12dc6 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline All of the tasks described belong in management plane, while I=E2=80=99m = not particularly fond of using DHCP, having single source of truth for co= nfigurational state is better than configuring box by box (and excel to m= anage it :)) Most SP=E2=80=99s (and as Stephane alluded) already have a centralized ma= nagement entity that takes care of configuration management and soft reso= urce (such as IP=E2=80=99s, SID=E2=80=99s, RT/RDs, etc allocation. Cheers, Jeff On Jul 24, 2019, 12:38 PM -0400, Andrew G. Malis , w= rote: > Sasha, > > Most =22normal=22 DHCP servers require manual configuration=C2=A0of som= e sort=C2=A0if you want to guarantee persistence of the assigned IP addre= ss (i.e. =22static=22 DHCP). So we're back to =22manual=22 management, ev= en if the results of the manual management are conveyed by a dynamic prot= ocol. > > Cheers, > Andy > > > > On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein wrote: > > > Robert, Kireeti and all, > > > I think that both loopbacks and their association with SIDs should = be kept persistent. > > > > > > Whether such persistency is provided by the means of static configu= ration, or by the means that are external to some dynamic protocol is a d= ifferent question. > > > E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office comput= er) may think that it obtains a dynamic IP address in the company network= from the DHCP server every time I turn it on, but the DHCP server actual= ly takes care to assign to it the same IP address every time. > > > > > > Does this help in any way=3F > > > > > > Regards, > > > Sasha > > > > > > Office: +972-39266302 > > > Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549266302 > > > Email:=C2=A0=C2=A0 Alexander.Vainshtein=40ecitele.com > > > > > > =46rom: spring On Behalf Of Kireeti Kom= pella > > > Sent: Wednesday, July 24, 2019 6:36 PM > > > To: Robert Raszuk > > > Cc: SPRING WG List > > > Subject: Re: =5Bspring=5D Managing =22global=22 SIDs > > > > > > Hi Robert, > > > > > > On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote: > > > > Hi Kireeti, > > > > > > > > I would like to challenge a bit your fundamental assumption which= is to state that while loopbacks are very important and locally signific= ant and warrant manual/nms provisioning SIDs are not. > > > > > > Actually, what I said at the mike is that I believe that both loopb= acks and global SIDs should be managed by DHCP.=C2=A0 But that's a distra= ction; the point at hand is whether global SIDs should be managed =22manu= ally=22 (or by NMS or equivalent) (i.e., static), or by a protocol (say D= HCP) (i.e., dynamic).=C2=A0 You say the former ... thanks for the feedbac= k. > > > > > > =C2=A0-- > > > Kireeti > > > > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F > > > > > > This e-mail message is intended for the recipient only and contains= information which is > > > CON=46IDENTIAL and which may be proprietary to ECI Telecom. If you = have received this > > > transmission in error, please inform us by e-mail, phone or fax, an= d then delete the original > > > and all copies thereof. > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > > > spring mailing list > > > spring=40ietf.org > > > https://www.ietf.org/mailman/listinfo/spring > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > spring mailing list > spring=40ietf.org > https://www.ietf.org/mailman/listinfo/spring --5d389d1f_1a27709e_12dc6 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
All of the tasks described belong in management pla= ne, while I=E2=80=99m not particularly fond of using DHCP, having single = source of truth for configurational state is better than configuring box = by box (and excel to manage it :))
Most SP=E2=80=99s (and as Stephane alluded) already= have a centralized management entity that takes care of configuration ma= nagement and soft resource (such as IP=E2=80=99s, SID=E2=80=99s, RT/RDs, = etc allocation.

Cheers,
Jeff
On Jul 24, 2019, 12:38 PM -0400, An= drew G. Malis <agmalis=40gmail.com>, wrote:
Sasha,

Most =22normal=22 DHCP servers require manual configuration&=23160;o= f some sort&=23160;if you want to guarantee persistence of the assigned I= P address (i.e. =22static=22 DHCP). So we're back to =22manual=22 managem= ent, even if the results of the manual management are conveyed by a dynam= ic protocol.

Cheers,
Andy


On Wed, Jul 24, 2019 at 1= 1:53 AM Alexander Vainshtein <Alexander.Vainshtein=40ecitele.com> wrote:
=

Robert, Kireeti and all,<= u>

I think that both loopbacks and = their association with SIDs should be kept persistent. <= /u>

&=23160;

Whether such persistency is prov= ided by the means of static configuration, or by the means that are exter= nal to some dynamic protocol is a different question.

E.g., a =E2=80=9Cnormal=E2=80=9D= DHCP client (like my office computer) may think that it obtains a dynami= c IP address in the company network from the DHCP server every time I tur= n it on, but the DHCP server actually takes care to assign to it the same= IP address every time.

&=23160;

Does this help in any way=3F<= /u>

&=23160;

Regards,

Sasha

&=23160;

Office: +972-39266302<= /u>

Cell:&=23160;&=23160;&=23160;&=23= 160;&=23160; +972-549266302

Email:&=23160;&=23160; A= lexander.Vainshtein=40ecitele.com

&=23160;

=46rom: spring <spring-bounces=40ietf.org> On Behalf Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk=40gmail.com>
Cc: SPRING WG List <spring=40ietf.org>
Subject: Re: =5Bspring=5D Managing =22global=22 SIDs=

&=23160;

Hi Robert,

&=23160;

On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk= <r= raszuk=40gmail.com> wrote:

Hi Kireeti,

&=23160;

I would like to challenge a bit your fundamental assumption which is to = state that while loopbacks are very important and locally significant and= warrant manual/nms provisioning SIDs are not.&=23160;

&=23160;

Actually, what I said at the mike is that I be= lieve that both loopbacks and global SIDs should be managed by DHCP.&=231= 60; But that's a distraction; the point at hand is whether global SIDs sh= ould be managed =22manually=22 (or by NMS or equivalent) (i.e., static), = or by a protocol (say DHCP) (i.e., dynamic).&=23160; You say the former .= .. thanks for the feedback.

&=23160;

&=23160;--&=23160;

Kireeti


=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=

This e-mail message is intended for the recipient only and contains infor= mation which is
CON=46IDENTIAL and which may be proprietary to ECI Telecom. If you have r= eceived this
transmission in error, please inform us by e-mail, phone or fax, and then= delete the original
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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 m1PcviS-5THo for ; Wed, 24 Jul 2019 11:23:40 -0700 (PDT) Received: from mail-yb1-xb2a.google.com (mail-yb1-xb2a.google.com [IPv6:2607:f8b0:4864:20::b2a]) (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 7A7F7120112 for ; Wed, 24 Jul 2019 11:23:40 -0700 (PDT) Received: by mail-yb1-xb2a.google.com with SMTP id x188so13013178yba.8 for ; Wed, 24 Jul 2019 11:23:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=5aWv2Uc4doYvG4qxqmytmmxGSPEhryNcVGTdEhZF/rU=; b=wIo882c/CiOu0ycTMp6tQI/zDDpTDkxj9+7zfCuO6Mlh7CH1ukagkulM6yiP5GSYtV BA9lI3TETqOWnC+oqhzdSt68EUIkczma5gYBfboHjYOvFSduXblFdcOtGm9ux9I83GYV 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APXvYqyWStZVZquOctb/rK0OF35qm2UXJc6KYxk7qZY5QbwSS9e0hW19FIEC915+dlbNeGq0xwr9QL2eN6NtyBV4JH0= X-Received: by 2002:a25:8282:: with SMTP id r2mr24945225ybk.7.1563992619106; Wed, 24 Jul 2019 11:23:39 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Przemyslaw Krol Date: Wed, 24 Jul 2019 14:23:01 -0400 Message-ID: To: Vishnu Pavan Beeram Cc: draft-ietf-spring-segment-routing-policy@ietf.org, SPRING WG Content-Type: multipart/alternative; boundary="0000000000007eb34e058e7168d1" Archived-At: Subject: Re: [spring] Comments on draft-ietf-spring-segment-routing-policy (ver 03) X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 18:23:43 -0000 --0000000000007eb34e058e7168d1 Content-Type: text/plain; charset="UTF-8" Hi Vishnu, Clarification question, if I may. Are you envisioning weights to be normalized for all sub-candidate-paths (regardless of the candidate-path they belong to), or rather propose to have a 2-level split: - weight for candidate-path grouping specific sub-candidate-paths defining "global" share of traffic, in comparison with other candidate-paths - weight for specific sub-candidate-path defining "local" share of the traffic within specific candidate-path, in comparison with other sub-candidate-paths in that particular candidate-path thanks, pk On Wed, Jul 24, 2019 at 6:42 AM Vishnu Pavan Beeram < vishnupavan.ietf@gmail.com> wrote: > Authors, Hi! > > There are some use-cases where the candidate-path (multipath) needs to be > constructed in such a way that a part of the multipath (a set of > segment-lists) uses one set of constraints, while the other part (another > set of segment-lists) uses another set of constraints. Consider the > scenario where the traffic needs to be steered onto a policy in such a way > that a specified portion of it uses paths that traverse only blue links > while the rest uses paths that traverse only red links. > > The current semantics of a candidate-path as defined in Section 2.2 of > version 3 preclude such use-cases. It should be possible to let the > semantics be a tad more flexible than they currently are and cater to the > above scenario (and the likes of it). > > There are a few different ways of addressing this, but I would like to > propose one that seems least disruptive. > > In addition to the currently specified semantics: > -- A candidate path may comprise of a set of sub-candidate paths where > each each sub-candidate path is either dynamic or explicit. The > sub-candidate path is the unit of signaling of an SR policy between a > headend and a controller.. > > Regards, > -Pavan > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > -- Przemyslaw "PK" Krol | Strategic Network Engineer ing | pkrol@google.com --0000000000007eb34e058e7168d1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi=C2=A0Vishnu,

Clarification question,= if I may.
Are you envisioning weights to be normalized for all s= ub-candidate-paths (regardless of the candidate-path they belong to), or ra= ther propose to have a 2-level split:
- weight=C2=A0for candidate= -path grouping specific sub-candidate-paths defining "global" sha= re of traffic, in comparison with other candidate-paths
- weight = for specific=C2=A0sub-candidate-path defining "local" share of th= e traffic within specific candidate-path, in comparison with other sub-cand= idate-paths in that particular=C2=A0candidate-path

thanks,
pk

On Wed, Jul 24, 2019 at 6:42 AM Vishnu Pavan Bee= ram <vishnupavan.ietf@gmai= l.com> wrote:
Authors, Hi!

There are = some use-cases where the candidate-path (multipath) needs to be constructed= in such a way that a part of the multipath (a set of segment-lists) uses o= ne set of constraints, while the other part (another set of segment-lists) = uses another set of constraints. Consider the scenario where the traffic ne= eds to be steered onto a policy in such a way that a specified portion of i= t uses paths that traverse only blue links while the rest uses paths that t= raverse only red links.

The current semantics of a= candidate-path as defined in Section 2.2 of version 3 preclude such use-ca= ses. It should be possible to let the semantics be a tad more flexible than= they currently are and cater to the above scenario (and the likes of it).<= br>

There are a few different ways of addressing t= his, but I would like to propose one that seems least disruptive.

In addition to the currently specified semantics:
-- A candidate path may comprise of a set of sub-candidate paths where eac= h each sub-candidate path is either dynamic or explicit. The sub-candidate = path is the unit of signaling of an SR policy between a headend and a contr= oller..

Regards,
-Pavan
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring


--
=
Przemyslaw "PK" Krol |=C2=A0Strategic Network Engineering |=C2=A0pkrol@go= ogle.com=C2=A0
=
--0000000000007eb34e058e7168d1-- From nobody Wed Jul 24 11:25:38 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0C9031202A5 for ; Wed, 24 Jul 2019 11:25:37 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HP_jHZDVrkQV for ; Wed, 24 Jul 2019 11:25:34 -0700 (PDT) Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) (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 EA67C120112 for ; Wed, 24 Jul 2019 11:25:33 -0700 (PDT) Received: by mail-wr1-x435.google.com with SMTP id y4so48034672wrm.2 for ; Wed, 24 Jul 2019 11:25:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=LXakkSorQjOYwMigsYNGr++Olq5Z+AvmD+iqRI+YsO0=; b=JqumhZqOYdRGADHvx9F1TgT8CLwuR8eW6zKdkELf5DZYZFZ2fUO4iToPAfWpiuVJoO zU5wX9oUJMLG9pYFckFFLWMoxQaEJ2+Ux4vPzMlJwWHpzwbHcdkjqJKD+Hv6as3+ekGn hTZXgoOROOq/rbdzPrEP0kEfV76Hx5XkVZ+5wrQtFxr6ENbLynDnHnd3Js/ZtrdLkZBc O14hlzlmEZRo6F/XXQqfthdKInkNFux4P1ak3d0kfl+LIUZzrXAgwV/5tBZoDWm4Dm9I xA7/zDk1xipy/zd8pSk/QfI2E1IkvzcQZyY+ZEQFwxhKTOaIHQHxMrb41ow8YJ+ZbCkp e8JQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=LXakkSorQjOYwMigsYNGr++Olq5Z+AvmD+iqRI+YsO0=; b=ePE0zAvICQrkLBxKxY7Xsxg7JGbNJ1KBReaO3TZxdfQ2lDDpUoi5a0siwdUHf55rnR Zdi4UVqYEIxm9HVdH5vPLQm4So++LNfW+AeQjjL8A+gRjSv4AAdz+VE9LlEJpTYLze+2 0UZH/n+0NEcRsVNbp77vvv/vV5hNkSPwn1eU3JkSyF2rvAhWBcKdIvhO+F/Bb18LOZYO QoUNxL0xuyZ/bswHJs79gQ7Z+TbfewWzaCdVhZVkC0iFOfTP4FE88V3QYnaz9ZgplPT0 cbmZApTZ1xaLKS+M4CZbNq8s/mGdDowgnAn98rea3CqzR8wGjsVFfKS/T2TBaE+xHNGk Uywg== X-Gm-Message-State: APjAAAW+TpYgBrbUDlfA//0N94RaLTDnGvtdiCWLaSCbCNPqxwOy4mkK Azd66DFe8IjdStC7ZpS1224= X-Google-Smtp-Source: APXvYqzz3maSEL8PDLM5rS3lp0t7ZSwTRwB0SYtJ3EFA9weaNMDfwBXgNNSgGqYFtIgwDpJiARcqYA== X-Received: by 2002:adf:cc85:: with SMTP id p5mr84091158wrj.47.1563992732166; Wed, 24 Jul 2019 11:25:32 -0700 (PDT) Received: from [192.168.1.35] ([2.176.136.85]) by smtp.gmail.com with ESMTPSA id q193sm34025670wme.8.2019.07.24.11.25.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 11:25:31 -0700 (PDT) From: vahid tavajjohi Message-Id: Content-Type: multipart/alternative; boundary="Apple-Mail=_8DCCF38D-693B-41CA-B9DF-7EAB3CBE5EBF" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Wed, 24 Jul 2019 22:55:27 +0430 In-Reply-To: Cc: Alexander Vainshtein , "Andrew G. Malis" , SPRING WG List , Kireeti Kompella , Robert Raszuk To: Jeff Tantsura References: X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 18:25:37 -0000 --Apple-Mail=_8DCCF38D-693B-41CA-B9DF-7EAB3CBE5EBF Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi all, I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy = to manage global SID allocation with multi-vendor environment alongside = multi-NMS. Therefore, PCE (standard) is better choice. Regards, Vahid vahid.tavajjohi@gmail.com > On Jul 24, 2019, at 10:32 PM, Jeff Tantsura = wrote: >=20 > All of the tasks described belong in management plane, while I=E2=80=99m= not particularly fond of using DHCP, having single source of truth for = configurational state is better than configuring box by box (and excel = to manage it :)) > Most SP=E2=80=99s (and as Stephane alluded) already have a centralized = management entity that takes care of configuration management and soft = resource (such as IP=E2=80=99s, SID=E2=80=99s, RT/RDs, etc allocation. >=20 > Cheers, > Jeff > On Jul 24, 2019, 12:38 PM -0400, Andrew G. Malis , = wrote: >> Sasha, >>=20 >> Most "normal" DHCP servers require manual configuration of some sort = if you want to guarantee persistence of the assigned IP address (i.e. = "static" DHCP). So we're back to "manual" management, even if the = results of the manual management are conveyed by a dynamic protocol. >>=20 >> Cheers, >> Andy >>=20 >>=20 >> On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein = > wrote: >> Robert, Kireeti and all, >>=20 >> I think that both loopbacks and their association with SIDs should be = kept persistent. >>=20 >> =20 >>=20 >> Whether such persistency is provided by the means of static = configuration, or by the means that are external to some dynamic = protocol is a different question. >>=20 >> E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office = computer) may think that it obtains a dynamic IP address in the company = network from the DHCP server every time I turn it on, but the DHCP = server actually takes care to assign to it the same IP address every = time. >>=20 >> =20 >>=20 >> Does this help in any way? >>=20 >> =20 >>=20 >> Regards, >>=20 >> Sasha >>=20 >> =20 >>=20 >> Office: +972-39266302 >>=20 >> Cell: +972-549266302 >>=20 >> Email: Alexander.Vainshtein@ecitele.com = >> =20 >>=20 >> From: spring > On Behalf Of Kireeti Kompella >> Sent: Wednesday, July 24, 2019 6:36 PM >> To: Robert Raszuk > >> Cc: SPRING WG List > >> Subject: Re: [spring] Managing "global" SIDs >>=20 >> =20 >>=20 >> Hi Robert, >>=20 >> =20 >>=20 >> On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk > wrote: >>=20 >> Hi Kireeti, >>=20 >> =20 >>=20 >> I would like to challenge a bit your fundamental assumption which is = to state that while loopbacks are very important and locally significant = and warrant manual/nms provisioning SIDs are not.=20 >>=20 >> =20 >>=20 >> Actually, what I said at the mike is that I believe that both = loopbacks and global SIDs should be managed by DHCP. But that's a = distraction; the point at hand is whether global SIDs should be managed = "manually" (or by NMS or equivalent) (i.e., static), or by a protocol = (say DHCP) (i.e., dynamic). You say the former .... thanks for the = feedback. >>=20 >> =20 >>=20 >> --=20 >>=20 >> Kireeti >>=20 >>=20 >> = __________________________________________________________________________= _ >>=20 >> This e-mail message is intended for the recipient only and contains = information which is >> CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have = received this >> transmission in error, please inform us by e-mail, phone or fax, and = then delete the original >> and all copies thereof. >> = __________________________________________________________________________= _ >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring = >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring --Apple-Mail=_8DCCF38D-693B-41CA-B9DF-7EAB3CBE5EBF Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Hi all,

I think = each vendor will uses its own NMS. So, it can=E2=80=99t be easy to = manage global SID allocation with multi-vendor environment alongside = multi-NMS. Therefore, PCE (standard) is better choice.

Regards,
Vahid

vahid.tavajjohi@gmail.com

On Jul 24, 2019, at 10:32 PM, Jeff Tantsura <jefftant.ietf@gmail.com> wrote:

All of the tasks described belong in = management plane, while I=E2=80=99m not particularly fond of using DHCP, = having single source of truth for configurational state is better than = configuring box by box (and excel to manage it :))
Most SP=E2=80=99s (and as Stephane alluded) = already have a centralized management entity that takes care of = configuration management and soft resource (such as IP=E2=80=99s, = SID=E2=80=99s, RT/RDs, etc allocation.

Cheers,
Jeff
On Jul 24, 2019, 12:38 PM = -0400, Andrew G. Malis <agmalis@gmail.com>, wrote:
Sasha,

Most "normal" DHCP servers require manual = configuration of some sort if you want to guarantee = persistence of the assigned IP address (i.e. "static" DHCP). So we're = back to "manual" management, even if the results of the manual = management are conveyed by a dynamic protocol.

Cheers,
Andy


On Wed, Jul 24, 2019 at 11:53 AM = Alexander Vainshtein <Alexander.Vainshtein@ecitele.com> wrote:

Robert, Kireeti and all,

I think that both loopbacks and their association with = SIDs should be kept persistent.

 

Whether such persistency is provided by the means of = static configuration, or by the means that are external to some dynamic = protocol is a different question.

E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my = office computer) may think that it obtains a dynamic IP address in the = company network from the DHCP server every time I turn it on, but the = DHCP server actually takes care to assign to it the same IP address = every time.

 

Does this help in any way?

 

Regards,

Sasha

 

Office: +972-39266302

Cell:      +972-549266302

Email:   Alexander.Vainshtein@ecitele.com

 

From: spring = <spring-bounces@ietf.org> On Behalf = Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk@gmail.com>
Cc: SPRING WG List <spring@ietf.org>
Subject: Re: [spring] Managing "global" SIDs

 

Hi Robert,

 

On Wed, Jul 24, 2019 at 11:09 AM = Robert Raszuk <rraszuk@gmail.com> wrote:

Hi Kireeti,

 

I would like to = challenge a bit your fundamental assumption which is to state that while = loopbacks are very important and locally significant and warrant = manual/nms provisioning SIDs are not. 

 

Actually, what I said at the mike = is that I believe that both loopbacks and global SIDs should be managed = by DHCP.  But that's a distraction; the point at hand is whether = global SIDs should be managed "manually" (or by NMS or equivalent) = (i.e., static), or by a protocol (say DHCP) (i.e., dynamic).  You = say the former .... thanks for the feedback.

 

 -- 

Kireeti


= __________________________________________________________________________= _

This e-mail message is intended for the recipient only and contains = information which is
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have = received this
transmission in error, please inform us by e-mail, phone or fax, and = then delete the original
and all copies thereof.
= __________________________________________________________________________= _
_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring
_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring
_______________________________________________
spring = mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring

= --Apple-Mail=_8DCCF38D-693B-41CA-B9DF-7EAB3CBE5EBF-- From nobody Wed Jul 24 12:34:07 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 228DD120688 for ; Wed, 24 Jul 2019 12:34:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.996 X-Spam-Level: X-Spam-Status: No, score=-1.996 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, MIME_QP_LONG_LINE=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 Rsg6OSCJMh0H for ; Wed, 24 Jul 2019 12:33:59 -0700 (PDT) Received: from mail-qt1-x82c.google.com (mail-qt1-x82c.google.com [IPv6:2607:f8b0:4864:20::82c]) (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 D1E6712067C for ; Wed, 24 Jul 2019 12:33:58 -0700 (PDT) Received: by mail-qt1-x82c.google.com with SMTP id w17so2358888qto.10 for ; Wed, 24 Jul 2019 12:33:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=DK3nP6M5vyGTu1kMcnEiev+3vDLoQyGi2XMUbWUgznk=; b=NmwcL/9My54GhV5OF+Iy748wsrxkfaxQrHOiJ+82FzCOgpnpIadYy4aznfDTElQ/xK icqs6ZugSu2IHzmOACl8IThKWgYSA20z/dqZE4ZqzFLWGIlOPxSYuZwww+ofakb68MBh 5GyqC6T9x0KEeEZhwBmQwnwtJZABr1nEOpN9vzDsmamjkIG0CyV8iN3QmvJvwLM7xYZu CpzRBgslGWwxt6XWyArA1/JEg1d3mTD0RR215X9547gzj9VT4tOtvlaKIXnmGtXbAk+Z JZbHIDFg9Jj54XFXXwfZM8s6fhgH6qx2LLfS+06FM3c9wXXj1Ncnro5tlZ6JylTLZsba ZJFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=DK3nP6M5vyGTu1kMcnEiev+3vDLoQyGi2XMUbWUgznk=; b=TBgQ4yy9JR72lLKQik85pDyrxx0l27jvXv8jccb0btdKA29mUP+q9HbKiQoe58yaFl oiXCwiruhWjDNw44k1mUOgywgsJXYEEu02DelDMi2NOqaHc7R+IjkN3K/aUeR2gSFOxF BNwqsAHY5X8tcDuKLMFU8W79gej6P8fKSl2rAeVdk+ibS3KKHrb5RMPP7HDyCKIO1e/h vyEmwSqSrTawYiN7wUBty9oCCHe1naZS8r8nidS3H+1iXPc6/qB/AjhZ/DFzxAcX543A TwsR0GGVYBBJA5AwC4nD/kaTqYbKj1UP4gDlNNMkSfNVUJkwxxKJz4u58CkiX79/LnfG mkkQ== X-Gm-Message-State: APjAAAXn7h7lU/jtvC9ANa5F2o0CjNtQVFIOUpZCcijLGI76o+6rSxJU O5IgWgZyfulsMvGNYZhSuco= X-Google-Smtp-Source: APXvYqwqe5LCg2wNV+F5m4Q8xd6PNe4fDsxAQfkk1Bk9XspOrjxJaRcASjVP/afmEYpu+JNsmQ7dIQ== X-Received: by 2002:aed:3325:: with SMTP id u34mr57882714qtd.324.1563996837904; Wed, 24 Jul 2019 12:33:57 -0700 (PDT) Received: from ?IPv6:2001:67c:1232:144:21c4:4962:8228:ea20? ([2001:67c:1232:144:21c4:4962:8228:ea20]) by smtp.gmail.com with ESMTPSA id l19sm27652350qtb.6.2019.07.24.12.33.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 12:33:57 -0700 (PDT) Content-Type: multipart/alternative; boundary=Apple-Mail-C9A24CF5-6F97-4BBF-AD62-D59119F382F0 Mime-Version: 1.0 (1.0) From: Kireeti Kompella X-Mailer: iPhone Mail (16F203) In-Reply-To: Date: Wed, 24 Jul 2019 15:33:55 -0400 Cc: Alexander Vainshtein , Robert Raszuk , SPRING WG List Content-Transfer-Encoding: 7bit Message-Id: References: To: "Andrew G. Malis" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 19:34:06 -0000 --Apple-Mail-C9A24CF5-6F97-4BBF-AD62-D59119F382F0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Sasha, Yes, this helps, but let=E2=80=99s separate persistent and deterministic. (= The latter is probably better terminology than =E2=80=9Cstatic=E2=80=9D and =E2= =80=9Cdynamic=E2=80=9D.) Deterministic means the operator knows a priori wh= at SID stouter will get. =20 DHCP servers support persistence (my phone gets the same IP, even after bein= g away for several hours). This doesn=E2=80=99t require configuration. DHCP also allows for determinism, to Andy=E2=80=99s point. That requires lo= ts of configuration. A simple reply to the list on whether or not you believe that global SIDs ne= ed to be persistent and/or deterministic would be helpful to hone in on the b= est protocol for allocation. So far, the count is, 1 for persistent but not necessarily deterministic (me= ), 1 for persistent and deterministic (Robert). Kireeti > On Jul 24, 2019, at 12:38, Andrew G. Malis wrote: >=20 > Sasha, >=20 > Most "normal" DHCP servers require manual configuration of some sort if yo= u want to guarantee persistence of the assigned IP address (i.e. "static" DH= CP). So we're back to "manual" management, even if the results of the manual= management are conveyed by a dynamic protocol. >=20 > Cheers, > Andy >=20 >=20 >> On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein wrote: >> Robert, Kireeti and all, >>=20 >> I think that both loopbacks and their association with SIDs should be kep= t persistent. >>=20 >> =20 >>=20 >> Whether such persistency is provided by the means of static configuration= , or by the means that are external to some dynamic protocol is a different q= uestion. >>=20 >> E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office computer) ma= y think that it obtains a dynamic IP address in the company network from the= DHCP server every time I turn it on, but the DHCP server actually takes car= e to assign to it the same IP address every time. >>=20 >> =20 >>=20 >> Does this help in any way? >>=20 >> =20 >>=20 >> Regards, >>=20 >> Sasha >>=20 >> =20 >>=20 >> Office: +972-39266302 >>=20 >> Cell: +972-549266302 >>=20 >> Email: Alexander.Vainshtein@ecitele.com >>=20 >> =20 >>=20 >> From: spring On Behalf Of Kireeti Kompella >> Sent: Wednesday, July 24, 2019 6:36 PM >> To: Robert Raszuk >> Cc: SPRING WG List >> Subject: Re: [spring] Managing "global" SIDs >>=20 >> =20 >>=20 >> Hi Robert, >>=20 >> =20 >>=20 >> On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote:= >>=20 >> Hi Kireeti, >>=20 >> =20 >>=20 >> I would like to challenge a bit your fundamental assumption which is to s= tate that while loopbacks are very important and locally significant and war= rant manual/nms provisioning SIDs are not.=20 >>=20 >> =20 >>=20 >> Actually, what I said at the mike is that I believe that both loopbacks a= nd global SIDs should be managed by DHCP. But that's a distraction; the poi= nt at hand is whether global SIDs should be managed "manually" (or by NMS or= equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic). Y= ou say the former ... thanks for the feedback. >>=20 >> =20 >>=20 >> --=20 >>=20 >> Kireeti >>=20 >>=20 >> _________________________________________________________________________= __ >>=20 >> This e-mail message is intended for the recipient only and contains infor= mation which is=20 >> CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rec= eived this=20 >> transmission in error, please inform us by e-mail, phone or fax, and then= delete the original=20 >> and all copies thereof. >> _________________________________________________________________________= __ >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring --Apple-Mail-C9A24CF5-6F97-4BBF-AD62-D59119F382F0 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Sasha,

Yes, this helps, but let=E2=80=99s separate pers= istent and deterministic.  (The latter is p= robably better terminology than =E2=80=9Cstatic=E2=80=9D and =E2=80=9Cdynami= c=E2=80=9D.)  Deterministic means the operator knows a priori what SID s= touter will get.  

DHCP servers support= persistence (my phone gets the same IP, even after being away for several h= ours).  This doesn=E2=80=99t require configuration.

DHCP also allows for determinism, to Andy=E2=80=99s point.  That r= equires lots of configuration.

A simple reply to th= e list on whether or not you believe that global SIDs need to be persistent and/or deterministic would be helpful to hone in on the best protocol for allocati= on.

So far, the count is, 1 for persistent but not n= ecessarily deterministic (me), 1 for persistent and deterministic (Robert).<= /div>

Kireeti<= /div>

On Jul 24, 2019, at 12:38, Andrew G. Malis <agmalis@gmail.com> wrote:

Sasha,
Most "normal" DHCP servers require manual configuration of= some sort if you want to guarantee persistence of the assigned IP addr= ess (i.e. "static" DHCP). So we're back to "manual" management, even if the r= esults of the manual management are conveyed by a dynamic protocol.

Cheers,
Andy


On Wed, Jul 24, 2= 019 at 11:53 AM Alexander Vainshtein <Alexander.Vainshtein@ecitele.com> wrote:

Robert, Kireeti and all,<= /p>

I think that both loopbacks and their associat= ion with SIDs should be kept persistent.

 

Whether such persistency is provided by the me= ans of static configuration, or by the means that are external to some dynam= ic protocol is a different question.

E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (= like my office computer) may think that it obtains a dynamic IP address in t= he company network from the DHCP server every time I turn it on, but the DHCP server actually takes care to assign to it the sam= e IP address every time.

 

Does this help in any way?

 

Regards,

Sasha

 

Office: +972-39266302

=

Cell:      +972-54926= 6302

Email:   Alexander.Vainshtein@ecitele.com<= /a>

 

From: spring <spring-bounces@ietf.org> On Behalf Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk@gmail.com>
Cc: SPRING WG List <spring@ietf.org>
Subject: Re: [spring] Managing "global" SIDs

=

 

Hi Robert,

 

On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk <rraszuk@gmail.com&g= t; wrote:

Hi Kiree= ti,

&= nbsp;

I would l= ike to challenge a bit your fundamental assumption which is to state that wh= ile loopbacks are very important and locally significant and warrant manual/= nms provisioning SIDs are not. 

 

Actually, what I said at the mike is that I believe t= hat both loopbacks and global SIDs should be managed by DHCP.  But that= 's a distraction; the point at hand is whether global SIDs should be managed= "manually" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic).  You say t= he former ... thanks for the feedback.

 

 -- 

Kireeti


___________________________________________________________________________<= br>
This e-mail message is intended for the recipient only and contains informat= ion which is
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have receiv= ed this
transmission in error, please inform us by e-mail, phone or fax, and then de= lete the original
and all copies thereof.
___________________________________________________________________________<= br>
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= --Apple-Mail-C9A24CF5-6F97-4BBF-AD62-D59119F382F0-- From nobody Wed Jul 24 13:04:31 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 669321205F1 for ; Wed, 24 Jul 2019 13:04:28 -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, 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=raszuk.net 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 3s1FGBGyUL3V for ; Wed, 24 Jul 2019 13:04:25 -0700 (PDT) Received: from mail-qk1-x734.google.com (mail-qk1-x734.google.com [IPv6:2607:f8b0:4864:20::734]) (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 36C6A1204DC for ; Wed, 24 Jul 2019 13:04:25 -0700 (PDT) Received: by mail-qk1-x734.google.com with SMTP id m14so9040122qka.10 for ; Wed, 24 Jul 2019 13:04:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raszuk.net; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=2Q7JDZGRwl1hYThvOE9BmF509JXoqSOeY8xQMdaVd2w=; b=GkWdvVO0AornWy9wEk/QjwV0qQ/CLadjsWVtPld0klxmBhnxJx3onQNTejXy7XS8K2 FImIcHKb9A3wzVJocfKiC6wpjhC+xw1vWtJdaV7iJNXqCaNcHzApM6C7yTmaOhI8MxFU PNJx/O95OceehN9zKlmFSVf0Cj+c542YkFmtvj6B0GswKE5c1UtnfmuSYKjGkhjjp7iW 4MM7aSrI82JsN2K4LXx/uv+PlkAGP//PdoMP+mGKf0Tq3huVMOcyg/krpuCV9mCVlDcg ZXjXTUwzwvqPBaE7Wi1ryEocTL1hv2Am3HqsR0g2u74Z0N2815riT+zakSNKaq7n8bBd o59Q== 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=2Q7JDZGRwl1hYThvOE9BmF509JXoqSOeY8xQMdaVd2w=; b=hzXUeyj6zqFSxRHImlwR+0fSDyVofZuUmXw+6/sMCFwRLhBLJFGRlIZzCbny1mssdR vvH3aACKYUNSJ/cABqKUBI03QywifTaQ3/lscP3SEexNh5pNr437SHlpp51t9J1BsU4n WBHJlt16VS20T1cOivVvzyZKCMYvC/JB5lCUD3ULxZunVpKKbdLgSC++w3Sijb/0jwx6 jJ9rVRKh9aLYNbFL0X5IvSk71Xt/xf/3/AGiN27ZmIj0kzv7mKd1wI+LKO3h8ie0Bk30 T6UIY03TAbDkcw2iOFiUB/LmKXK8Cvs9l7khIcJzRiCNC0p/7uSxESPTdALbOpQEtHhw /GEA== X-Gm-Message-State: APjAAAW690cpvOMI942uVEQXwdC8hOyVS9C66M6wy6a9ppKKqa+EiYMr 3rKIwwxU8yGvk1UlhpiZzeN/HrRaOU+o7W0qbxzuLA== X-Google-Smtp-Source: APXvYqw5difeagEogbbJUuPSaYaOI2vu8D6AgJ0hFhpKa/InAVr7dA72dHfTnbz6OHF0ASqcOlzLnsLS+m9qqqNJ9AU= X-Received: by 2002:a05:620a:1286:: with SMTP id w6mr54191873qki.219.1563998664133; Wed, 24 Jul 2019 13:04:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Robert Raszuk Date: Wed, 24 Jul 2019 22:04:15 +0200 Message-ID: To: Kireeti Kompella Cc: "Andrew G. Malis" , SPRING WG List , Alexander Vainshtein , Robert Raszuk Content-Type: multipart/alternative; boundary="000000000000ce2116058e72d079" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:04:29 -0000 --000000000000ce2116058e72d079 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hey Kireeti, Just one observation on your informal pool :) > So far, the count is, 1 for persistent but not necessarily deterministic (me), 1 for persistent and deterministic (Robert). As deterministic really requires persistence, a better pool would be to just see who thinks SIDs need to be deterministic or not. And with that if you are doing such pool it may make sense to ask for this separately for node SIDs vs adj SIDs vs other locally significant SIDs. Putting all such SID types into one basket may not result in meaningful survey :) To restate my opinion was that node SIDs should be deterministic and provisioned by given network's NMS system of the local choice. In the case of SRv6 node SID maybe it's loopback's address. Adj. SIDs IMHO could be algorithmically derived. Special app/use SIDs - hard to tell as it really depands on the use case. Cheers, R. On Wed, Jul 24, 2019 at 9:34 PM Kireeti Kompella wrote: > Sasha, > > Yes, this helps, but let=E2=80=99s separate *persistent* and *determinist= ic. *(The > latter is probably better terminology than =E2=80=9Cstatic=E2=80=9D and = =E2=80=9Cdynamic=E2=80=9D.) > Deterministic means the operator knows a priori what SID stouter will ge= t. > > > DHCP servers support persistence (my phone gets the same IP, even after > being away for several hours). This doesn=E2=80=99t require configuratio= n. > > DHCP also allows for determinism, to Andy=E2=80=99s point. That requires= lots of > configuration. > > A simple reply to the list on whether or not you believe that global SIDs > need to be persistent and/or deterministic would be helpful to hone in on > the best protocol for allocation. > > So far, the count is, 1 for persistent but not necessarily deterministic > (me), 1 for persistent and deterministic (Robert). > > Kireeti > > On Jul 24, 2019, at 12:38, Andrew G. Malis wrote: > > Sasha, > > Most "normal" DHCP servers require manual configuration of some sort if > you want to guarantee persistence of the assigned IP address (i.e. "stati= c" > DHCP). So we're back to "manual" management, even if the results of the > manual management are conveyed by a dynamic protocol. > > Cheers, > Andy > > > On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein < > Alexander.Vainshtein@ecitele.com> wrote: > >> Robert, Kireeti and all, >> >> I think that both loopbacks and their association with SIDs should be >> kept *persistent*. >> >> >> >> Whether such persistency is provided by the means of static >> configuration, or by the means that are external to some dynamic protoco= l >> is a different question. >> >> E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office computer) m= ay think that it >> obtains a dynamic IP address in the company network from the DHCP server >> every time I turn it on, but the DHCP server actually takes care to assi= gn >> to it the same IP address every time. >> >> >> >> Does this help in any way? >> >> >> >> Regards, >> >> Sasha >> >> >> >> Office: +972-39266302 >> >> Cell: +972-549266302 >> >> Email: Alexander.Vainshtein@ecitele.com >> >> >> >> >> *From:* spring *On Behalf Of *Kireeti Kompella >> *Sent:* Wednesday, July 24, 2019 6:36 PM >> *To:* Robert Raszuk >> *Cc:* SPRING WG List >> *Subject:* Re: [spring] Managing "global" SIDs >> >> >> >> Hi Robert, >> >> >> >> On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote= : >> >> Hi Kireeti, >> >> >> >> I would like to challenge a bit your fundamental assumption which is to >> state that while loopbacks are very important and locally significant an= d >> warrant manual/nms provisioning SIDs are not. >> >> >> >> Actually, what I said at the mike is that I believe that both loopbacks >> and global SIDs should be managed by DHCP. But that's a distraction; th= e >> point at hand is whether global SIDs should be managed "manually" (or by >> NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., >> dynamic). You say the former ... thanks for the feedback. >> >> >> >> -- >> >> Kireeti >> >> >> ________________________________________________________________________= ___ >> >> This e-mail message is intended for the recipient only and contains >> information which is >> CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have >> received this >> transmission in error, please inform us by e-mail, phone or fax, and the= n >> delete the original >> and all copies thereof. >> >> ________________________________________________________________________= ___ >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring >> > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --000000000000ce2116058e72d079 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hey Kireeti,

Just one observation= on your informal pool :)=C2=A0

> So far, the count i= s, 1 for persistent but not necessarily deterministic (me), 1 for persisten= t and deterministic (Robert).=C2=A0=C2=A0

As d= eterministic really requires persistence, a better pool would be to just se= e who thinks SIDs need to be deterministic or not.=C2=A0

And with that if you are doing such pool it may make sense to ask fo= r this separately for node SIDs vs adj SIDs vs other locally significant SI= Ds.=C2=A0

Putting all such SID types into one bask= et may not result in meaningful survey :)=C2=A0

To= restate my opinion was that node SIDs should be deterministic and provisio= ned by given network's NMS system of the local choice. In the case of S= Rv6 node SID maybe it's loopback's address.=C2=A0

Adj. SIDs IMHO could be algorithmically derived.=C2=A0
Special app/use SIDs - hard to tell as it really depands on th= e use case.=C2=A0

Cheers,
R.
<= br>

On Wed, Jul 24, 2019 at 9:34 PM Kireeti Kompella <kireeti.kompella@gmail.com> wrote:<= br>
Sasha,

Yes, this helps,= but let=E2=80=99s separate persistent=C2=A0and determinis= tic. =C2=A0(The latter is=C2=A0probably better terminology than = =E2=80=9Cstatic=E2=80=9D and =E2=80=9Cdynamic=E2=80=9D.) =C2=A0Deterministi= c means the operator knows a priori what SID stouter will get. =C2=A0
=

DHCP servers support persistence (my phone gets = the same IP, even after being away for several hours).=C2=A0 This doesn=E2= =80=99t require configuration.

DHCP also allows fo= r determinism, to Andy=E2=80=99s point.=C2=A0 That requires lots of configu= ration.

A simple reply to the list on whether or n= ot you believe that global SIDs need to be persistent=C2=A0and/or deterministic would be h= elpful to hone in on the best protocol for allocation.

=
So far, the count is, 1 for persistent but not necessarily determinist= ic (me), 1 for persistent and deterministic (Robert).

<= div>
K= ireeti

On Jul 24, 2019, at 12:38, Andrew G. Malis= <agmalis@gmail.c= om> wrote:

<= div dir=3D"ltr">Sasha,

Most "normal" DHCP serv= ers require manual configuration=C2=A0of some sort=C2=A0if you want to guar= antee persistence of the assigned IP address (i.e. "static" DHCP)= . So we're back to "manual" management, even if the results o= f the manual management are conveyed by a dynamic protocol.

<= /div>
Cheers,
Andy


On Wed, Jul 24, 2019= at 11:53 AM Alexander Vainshtein <Alexander.Vainshtein@ecitele.com> w= rote:

Robert, Kireeti and all,

I think that both loopbacks and their associ= ation with SIDs should be kept persistent.

=C2=A0

Whether such persistency is provided by the = means of static configuration, or by the means that are external to some dy= namic protocol is a different question.

E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client= (like my office computer) may think that it obtains a dynamic IP address i= n the company network from the DHCP server every time I turn it on, but the DHCP server actually takes care to assign to it the sa= me IP address every time.

=C2=A0

Does this help in any way?

=C2=A0

Regards,

Sasha

=C2=A0

Office: +972-39266302

Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549= 266302

Email:=C2=A0=C2=A0 Alexander.Vainshtein@ecitele.= com

=C2=A0

From: spring <spring-bounces@ietf.org> On Behalf Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk@gmail.com>
Cc: SPRING WG List <spring@ietf.org>
Subject: Re: [spring] Managing "global" SIDs=

=C2=A0

Hi Robert,

=C2=A0

On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk <<= a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com= > wrote:

Hi Kire= eti,

= =C2=A0

I would= like to challenge a bit your fundamental assumption which is to state that= while loopbacks are very important and locally significant and warrant man= ual/nms provisioning SIDs are not.=C2=A0

=C2=A0

Actually, what I said at the mike is that I believe = that both loopbacks and global SIDs should be managed by DHCP.=C2=A0 But th= at's a distraction; the point at hand is whether global SIDs should be = managed "manually" (or by NMS or equivalent) (i.e., static), or by a protocol (say DHCP) (i.e., dynamic).=C2=A0 You say= the former ... thanks for the feedback.

=C2=A0

=C2=A0--=C2=A0

Kireeti


___________________________________________________________________________=

This e-mail message is intended for the recipient only and contains informa= tion which is
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have recei= ved this
transmission in error, please inform us by e-mail, phone or fax, and then d= elete the original
and all copies thereof.
___________________________________________________________________________=
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
______________________________________= _________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
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Malis" , SPRING WG List , Kireeti Kompella , Robert Raszuk Message-ID: In-Reply-To: References: X-Readdle-Message-ID: d3a6955d-17d1-4789-b9e8-3967bb31ed5a@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d38b9ee_94211f2_12dc6" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:05:07 -0000 --5d38b9ee_94211f2_12dc6 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Vahid, I think (sincerely hope) you are wrong, there=E2=80=99s a reason we have = spent last 7 or so years working on YANG. Cheers, Jeff On Jul 24, 2019, 2:25 PM -0400, vahid tavajjohi , wrote: > Hi all, > > I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy= to manage global SID allocation with multi-vendor environment alongside = multi-NMS. Therefore, PCE (standard) is better choice. > > Regards, > Vahid > > vahid.tavajjohi=40gmail.com > > > On Jul 24, 2019, at 10:32 PM, Jeff Tantsura wrote: > > > > All of the tasks described belong in management plane, while I=E2=80=99= m not particularly fond of using DHCP, having single source of truth for = configurational state is better than configuring box by box (and excel to= manage it :)) > > Most SP=E2=80=99s (and as Stephane alluded) already have a centralize= d management entity that takes care of configuration management and soft = resource (such as IP=E2=80=99s, SID=E2=80=99s, RT/RDs, etc allocation. > > > > Cheers, > > Jeff > > On Jul 24, 2019, 12:38 PM -0400, Andrew G. Malis , wrote: > > > Sasha, > > > > > > Most =22normal=22 DHCP servers require manual configuration=C2=A0of= some sort=C2=A0if you want to guarantee persistence of the assigned IP a= ddress (i.e. =22static=22 DHCP). So we're back to =22manual=22 management= , even if the results of the manual management are conveyed by a dynamic = protocol. > > > > > > Cheers, > > > Andy > > > > > > > > > > On Wed, Jul 24, 2019 at 11:53 AM Alexander Vainshtein wrote: > > > > > Robert, Kireeti and all, > > > > > I think that both loopbacks and their association with SIDs sho= uld be kept persistent. > > > > > > > > > > Whether such persistency is provided by the means of static con= figuration, or by the means that are external to some dynamic protocol is= a different question. > > > > > E.g., a =E2=80=9Cnormal=E2=80=9D DHCP client (like my office co= mputer) may think that it obtains a dynamic IP address in the company net= work from the DHCP server every time I turn it on, but the DHCP server ac= tually takes care to assign to it the same IP address every time. > > > > > > > > > > Does this help in any way=3F > > > > > > > > > > Regards, > > > > > Sasha > > > > > > > > > > Office: +972-39266302 > > > > > Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549266302 > > > > > Email:=C2=A0=C2=A0 Alexander.Vainshtein=40ecitele.com > > > > > > > > > > =46rom: spring On Behalf Of Kireeti= Kompella > > > > > Sent: Wednesday, July 24, 2019 6:36 PM > > > > > To: Robert Raszuk > > > > > Cc: SPRING WG List > > > > > Subject: Re: =5Bspring=5D Managing =22global=22 SIDs > > > > > > > > > > Hi Robert, > > > > > > > > > > On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk wrote: > > > > > > Hi Kireeti, > > > > > > > > > > > > I would like to challenge a bit your fundamental assumption w= hich is to state that while loopbacks are very important and locally sign= ificant and warrant manual/nms provisioning SIDs are not. > > > > > > > > > > Actually, what I said at the mike is that I believe that both l= oopbacks and global SIDs should be managed by DHCP.=C2=A0 But that's a di= straction; the point at hand is whether global SIDs should be managed =22= manually=22 (or by NMS or equivalent) (i.e., static), or by a protocol (s= ay DHCP) (i.e., dynamic).=C2=A0 You say the former .... thanks for the fe= edback. > > > > > > > > > > =C2=A0-- > > > > > Kireeti > > > > > > > > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F > > > > > > > > > > This e-mail message is intended for the recipient only and cont= ains information which is > > > > > CON=46IDENTIAL and which may be proprietary to ECI Telecom. If = you have received this > > > > > transmission in error, please inform us by e-mail, phone or fax= , and then delete the original > > > > > and all copies thereof. > > > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F > > > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F > > > > > spring mailing list > > > > > spring=40ietf.org > > > > > https://www.ietf.org/mailman/listinfo/spring > > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > > > spring mailing list > > > spring=40ietf.org > > > https://www.ietf.org/mailman/listinfo/spring > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > > spring mailing list > > spring=40ietf.org > > https://www.ietf.org/mailman/listinfo/spring > --5d38b9ee_94211f2_12dc6 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Vahid,

I think (sincerely hope) you are wrong, there=E2=80=99s a reason we have = spent last 7 or so years working on YANG.

Cheers,
Jeff
On Jul 24, 2019, 2:25 PM -0400, vah= id tavajjohi <vahid.tavajjohi=40gmail.com>, wrote:
Hi all,

I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy t= o manage global SID allocation with multi-vendor environment alongside mu= lti-NMS. Therefore, PCE (standard) is better choice.

Regards,
Vahid

vahid.t= avajjohi=40gmail.com

On Jul 24, 2019, at 10:32 PM, Jeff Tantsura <jefftant.ietf=40= gmail.com> wrote:

All of the tasks described belong in= management plane, while I=E2=80=99m not particularly fond of using DHCP,= having single source of truth for configurational state is better than c= onfiguring box by box (and excel to manage it :))
Most SP=E2=80=99s (and as Stephane a= lluded) already have a centralized management entity that takes care of c= onfiguration management and soft resource (such as IP=E2=80=99s, SID=E2=80= =99s, RT/RDs, etc allocation.

Cheers,
Jeff
On Jul 24, 2019, 12:= 38 PM -0400, Andrew G. Malis <agmalis=40gmail.com>, wrote:
Sasha,

Most =22normal=22 DHCP servers require manual configu= ration&=23160;of some sort&=23160;if you want to guarantee persistence of= the assigned IP address (i.e. =22static=22 DHCP). So we're back to =22ma= nual=22 management, even if the results of the manual management are conv= eyed by a dynamic protocol.

Cheers,
Andy


On Wed, Jul 24, 2019 at 1= 1:53 AM Alexander Vainshtein <Alexander.Vainshtein=40ecitele.com&g= t; wrote:

Robert, Kireeti a= nd all,

I think that both= loopbacks and their association with SIDs should be kept persistent.

&=23160;

Whether such pers= istency is provided by the means of static configuration, or by the means= that are external to some dynamic protocol is a different question.

E.g., a =E2=80=9C= normal=E2=80=9D DHCP client (like my office computer) may think that it o= btains a dynamic IP address in the company network from the DHCP server e= very time I turn it on, but the DHCP server actually takes care to assign= to it the same IP address every time.

&=23160;

Does this help in= any way=3F

&=23160;

Regards,

Sasha

&=23160;

Office: +972-3926= 6302

Cell:&=23160;&=23= 160;&=23160;&=23160;&=23160; +972-549266302

Email:&=23160;&=23= 160; Alexander.Vainshtein=40ecitele.com

&=23160;

=46rom: <= span style=3D=22font-size:11pt;font-family:Calibri,sans-serif=22 class=3D= =22=22>spring <spring-bounces=40ietf.org> On Behalf Of Kireeti Kompella
Sent: Wednesday, July 24, 2019 6:36 PM
To: Robert Raszuk <rraszuk=40gmail.com>
Cc: SPRING WG List <spring=40ietf.org&= gt;
Subject: Re: =5Bspring=5D Managing =22global=22 SID= s

&=23160;

Hi Robert,

&=23160;

On Wed, Jul 24, 2019 at 11:09 AM Robert Raszuk= <rraszuk=40gmail.com> wrote:

Hi Kireeti,

&=23160;

I would like to challenge a bit your fundamental assumpti= on which is to state that while loopbacks are very important and locally = significant and warrant manual/nms provisioning SIDs are not.&=23160;

&=23160;

Actually, what I said at the mike is that I be= lieve that both loopbacks and global SIDs should be managed by DHCP.&=231= 60; But that's a distraction; the point at hand is whether global SIDs sh= ould be managed =22manually=22 (or by NMS or equivalent) (i.e., static), = or by a protocol (say DHCP) (i.e., dynamic).&=23160; You say the former .= ... thanks for the feedback.<= /p>

&=23160;

&=23160;--&=23160;

Kireeti


=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=

This e-mail message is intended for the recipient only and contains infor= mation which is
CON=46IDENTIAL and which may be proprietary to ECI Telecom. If you have r= eceived this
transmission in error, please inform us by e-mail, phone or fax, and then= delete the original
and all copies thereof.
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--5d38b9ee_94211f2_12dc6-- From nobody Wed Jul 24 13:21:29 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B2955120494 for ; Wed, 24 Jul 2019 13:21:26 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.999 X-Spam-Level: X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, 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=raszuk.net 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 ZxR5ClKN20bL for ; Wed, 24 Jul 2019 13:21:25 -0700 (PDT) Received: from mail-qk1-x733.google.com (mail-qk1-x733.google.com [IPv6:2607:f8b0:4864:20::733]) (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 05B4412025D for ; Wed, 24 Jul 2019 13:21:25 -0700 (PDT) Received: by mail-qk1-x733.google.com with SMTP id s145so34756625qke.7 for ; Wed, 24 Jul 2019 13:21:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raszuk.net; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=/3uBeeZwy0fqyn5BUmhRSWMdHJPXDwWIQEaYBc5+dHM=; b=B0gF7NU3SviR2+t9ZDr7O3uJrkglJNfvWmjH37+RbtW/Y/2Y65WLSGU50GKQ0SAt2M oXjvtouKLJxzX/Nk79nF2cxmDfwSI4SB0VhgdnGmEgUzVKXSQHmCn+KIs/DTbMpRO8Lq giPxinLTYOZ1oijlxLgDTEbmsb25hSLYPuz/7yvPn0N50/hTgfSDR94TmB5P1B4MqE6R hri05T3M1kbHAlQcWuG5TTmdsI6O7Sko20Jv+s8mJVy7Bc4VAIo37zVcPCe0yDC2CA3N 0qz5AcTuLPNn80EipM3B/erDnznq+VpfYGc7SYNmUJ63Sh0FXfXr9Okn/bTSvkgo/iPH 1OpQ== 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=/3uBeeZwy0fqyn5BUmhRSWMdHJPXDwWIQEaYBc5+dHM=; b=Jx/dveWLcrEBhH9gYb3kvAFo536zBlgMx9i7mvI5D3P9ToIXQBWXOLDDpZBHQUoiT5 juUyZSCgKTaAH4rxkVIS7X6vShFhpoXwg+xHfHlafxbm4DEIhr5xMlsLWoAzWPI1eKaC +frpMGuaoe/9Ulg2soWu5wSD+mK97qB3t0VMBG3HnFl5pMpwn0kC5Dg4nlVAMGJeQeCm qhZjsUfnWDob3nM7mkkP6M25sKOYXrD/5HKvmJHpre0F8+fHqgIx9jXDgG5W+sLY68MV lsoKeHvFoZH6T6e6SMfSFtAiAvgGJDtJN4TxKJr9bIOvDENlGVJh6FVuiz0b5w5PvAKA TpGg== X-Gm-Message-State: APjAAAVqZFikAuHAoz6/nqXFr2+ZaiNCLKRnNT2PQ6BXieHdrlim1Kxj ux962tYQFsOc4xYrGpBNonyFYi/VbAiUONTpheMZXg== X-Google-Smtp-Source: APXvYqydZ/zgAeSKnjCs6nwdzR9TgPK8lzFFwqP6WVv3WhdDXvKLmz5gn3JAS9bfmn7bnmX3stT204nnXZNYw5Ub7xU= X-Received: by 2002:a05:620a:1286:: with SMTP id w6mr54236348qki.219.1563999684062; Wed, 24 Jul 2019 13:21:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Robert Raszuk Date: Wed, 24 Jul 2019 22:21:15 +0200 Message-ID: To: Jeff Tantsura Cc: vahid tavajjohi , Robert Raszuk , SPRING WG List , Alexander Vainshtein , "Andrew G. Malis" , Kireeti Kompella Content-Type: multipart/alternative; boundary="00000000000098fb9f058e730d0c" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:21:27 -0000 --00000000000098fb9f058e730d0c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Jeff, > I think (sincerely hope) you are wrong, there=E2=80=99s a reason we have = spent last 7 or so years working on YANG. Even if in the perfect universe all devices would support Yang models uniformly - customers are still going to use their private NMS systems except instead of CLI or xml as NNI to network elements they will use YANG models. r. --00000000000098fb9f058e730d0c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Jeff,

> I think (sincerel= y hope) you are wrong, there=E2=80=99s a reason we have spent last 7 or so = years working on YANG.

Even if in the perfect = universe all devices would support Yang models uniformly - customers are st= ill going to use their private NMS systems except instead of CLI or xml as = NNI to network elements they will use YANG models.=C2=A0

r.




=


--00000000000098fb9f058e730d0c-- From nobody Wed Jul 24 13:29:24 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5437312049B for ; Wed, 24 Jul 2019 13:29:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ct7OlA-YGq7j for ; Wed, 24 Jul 2019 13:29:20 -0700 (PDT) Received: from mail-qt1-x82e.google.com (mail-qt1-x82e.google.com [IPv6:2607:f8b0:4864:20::82e]) (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 2ED05120494 for ; Wed, 24 Jul 2019 13:29:20 -0700 (PDT) Received: by mail-qt1-x82e.google.com with SMTP id x22so41928543qtp.12 for ; Wed, 24 Jul 2019 13:29:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version; bh=GfKlFdGObaG7nmYSPSpv9EmZHTmFjtjJFWsLaaSfRpk=; b=iU2IA3QH9+WgbUg6fNt/W2ZgUHFRA+Twxvv6geqnQTG4RA2RpQV8Lw+W5SUral4039 swTnkPKHMnSwYIsVP2K6THLKG73P8vjN34Gg+hPuh77A9coJSwFVyNkJKvp0eSoCEBQ3 j0y1ekSYN2sK9oC/C/ybUzA+qwll5FUI1hXVa4GegfudU9xt5b7OuVIPKbN7gBj4KL43 yWzonecn6viAcO67VDYQKTb6D5i2GDaulRR3XMQuE1u1mE8ay1zmUUYOx9V7gO+OVlVQ 0MfPybNkMrbT6ya3zktf8wa1XuYHtwXLpmsclef8EbIuDQrDhbwNFlW3OlNkCD4NcCLQ nD3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version; bh=GfKlFdGObaG7nmYSPSpv9EmZHTmFjtjJFWsLaaSfRpk=; b=NUbiAFdQG/OBy5twS9AaxuqAiq8uZUwxLnocvWE1WvDxMq2ikZFQgvEj1Vr2u+FbZF KxVUNziX1yTLE+UQGUvmHLi+pCj6EWCanpNZZdYWL7w11AYOqf1V7Rc7tBBHZYwiEsgU jF5FDuiyvKtZ7ZX/YcxuuRcIzvUCmLC4ihWp6tOCTCT0pIeK6Nh3dlFVMFQCboMYvpEJ 5Ec+JtgDQG2zowqQ/vZ5bOj00qUEfMQCoum3qeo7ajW/lmcJCE1HrUpMF9pml/1lUgKh pHxdi3zPss17Hqdr4++3m7/taAmMoJzYpe9NsP4oqkep181VfqUj8n/o0Vk9QRQnwTcp zioA== X-Gm-Message-State: APjAAAWvjDV1ETcnT3bCRuygYN6vH+QObnrcJtsylzfC/4f8ZBo4kNIG f+xiDq/uODU6w+nJBWFTzeo= X-Google-Smtp-Source: APXvYqzI1QSITz/r2Z9RvI/5l0a50ppxx7gZWIAmPjGMK5Hi1aRC5ltb6jGo8gK21lEMIwKEGSyWwg== X-Received: by 2002:ac8:2bd4:: with SMTP id n20mr60126007qtn.131.1564000159257; Wed, 24 Jul 2019 13:29:19 -0700 (PDT) Received: from [2001:67c:1232:144:2083:8e8c:ff7f::] ([2001:67c:1232:144:cd8d:8bfe:dd2a:67e5]) by smtp.gmail.com with ESMTPSA id w16sm19456956qki.36.2019.07.24.13.29.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 13:29:18 -0700 (PDT) Date: Wed, 24 Jul 2019 16:29:12 -0400 From: Jeff Tantsura To: Robert Raszuk Cc: vahid tavajjohi , Robert Raszuk , SPRING WG List , Alexander Vainshtein , "Andrew G. Malis" , Kireeti Kompella Message-ID: <85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark> In-Reply-To: References: X-Readdle-Message-ID: 85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d38bf9d_7de67713_12dc6" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:29:22 -0000 --5d38bf9d_7de67713_12dc6 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Robert, Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per vendor=E2= =80=9D and hence a need to agree on control plane protocol (PCEP). Abusin= g control plane for configuration=E2=80=A6 been there :) Specifically to PCEP point - PCEP creates ephemeral state, (not persisten= t across reboots), and hence rather unsuitable for configuration. Cheers, Jeff On Jul 24, 2019, 4:21 PM -0400, Robert Raszuk , wrot= e: > Jeff, > > > I think (sincerely hope) you are wrong, there=E2=80=99s a reason we h= ave spent last 7 or so years working on YANG. > > Even if in the perfect universe all devices would support Yang models u= niformly - customers are still going to use their private NMS systems exc= ept instead of CLI or xml as NNI to network elements they will use YANG m= odels. > > r. > > > > > > --5d38bf9d_7de67713_12dc6 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Robert,

Sure, my point was that you won=E2=80=99t need a =E2= =80=9CNMS per vendor=E2=80=9D and hence a need to agree on control plane = protocol (PCEP). Abusing control plane for configuration=E2=80=A6 been th= ere :)
Specifically to PCEP point - PCEP creates ephemeral= state, (not persistent across reboots), and hence rather unsuitable for = configuration.&=23160;

Cheers,
Jeff
On Jul 24, 2019, 4:21 PM -0400, Rob= ert Raszuk <robert=40raszuk.net>, wrote:
Jeff,

> I think (sincerely hope) you are wrong, there=E2=80=99s a reaso= n we have spent last 7 or so years working on YANG.

Even if in the perfect universe all devices would support Yang model= s uniformly - customers are still going to use their private NMS systems = except instead of CLI or xml as NNI to network elements they will use YAN= G models.&=23160;

r.






--5d38bf9d_7de67713_12dc6-- From nobody Wed Jul 24 13:35:14 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8C48D1205F8 for ; Wed, 24 Jul 2019 13:35:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UsqySajQzd6l for ; Wed, 24 Jul 2019 13:35:10 -0700 (PDT) Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) (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 A2F22120494 for ; Wed, 24 Jul 2019 13:35:10 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id p184so21496942pfp.7 for ; Wed, 24 Jul 2019 13:35:10 -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=VFZbpW6fBXX4uKgmYrSPbYYKQiAdZbNFXmD6XeGoue8=; b=WJ/pyRpXEKiAWrUdS23rUTAH8NQ+mrVGodZvxNJ4amkgJPIBdvvGZE39mTxR7HSzOg BwJwdvbW17eyMxPlXwmEcppDXI4jwdYyI/VGryjm0ZHo5qBZL7d8LImWD5lwvPAvv9Q8 Wz2xGKQn9m8gRssdUlkt/9nVZA05DHRNOk2wkhFQoVuqrFGdZoa9Ses0FfX/pfKF4E3X 3thIKA9oIxg0T9AKy/MqOmxNT682aaijh7aV5xBjHoyX/azl2kfWmoRRvwhzhaiK0QnW Q+yLWbZYB4BZHLe7enn47t3qsaEif1n1pAHuLNhpoi+e/f/rhSZq9MP7cwXnweeiSmft 01mw== 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=VFZbpW6fBXX4uKgmYrSPbYYKQiAdZbNFXmD6XeGoue8=; b=ctfm/V7C16KnvOWw1v71awbGw7tRUfFFUuMDDDZdAsxcRzuYVvQTLY0ll0REH8TUIl QTjLHenvYAj/tDdm3H7NJKrRDzHteEwKHXyte8FQfhSGic+pSYhmlhhtwRfD2W6dnVsa hQ+/xaF8J0pb7/ayFh+09B6WwEZB5y7AHC/JgfsRxsCN0Cd6fuAHracrSMFmF133vLxD VXlm64raiEY4/8nIMQGuZtbLfFKkS2B2HBjHkqfgJbf5JHa8WL9yGVbJXx4eNOd5VZYB QxfrXevknn+n3SoMdVjNRYOeh9nypNPsy8exTvJKoY6ytA2S600D7EFFti/hnMBR2LE8 Oc9A== X-Gm-Message-State: APjAAAUzcBKBjqW2vgAMmPk2YMqS2Ih1eJ3C4VxZ2RfCvhql0cScJPUN S72jBOW3Btq0X8Ags1v+eglt6lFon/mn2dBl9Js= X-Google-Smtp-Source: APXvYqzEIfnLzsqw/0fGTLsBjUT7lgT8RQ/UcgYSQy0eEl9QZgb9EDa95D85V1s/IC2RqVm2CjNN0ZUWTYUM3BeV8wc= X-Received: by 2002:a63:c44c:: with SMTP id m12mr44547790pgg.396.1564000509608; Wed, 24 Jul 2019 13:35:09 -0700 (PDT) MIME-Version: 1.0 References: <85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark> In-Reply-To: <85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark> From: Robert Raszuk Date: Wed, 24 Jul 2019 22:35:00 +0200 Message-ID: To: Jeff Tantsura Cc: vahid tavajjohi , SPRING WG List , Alexander Vainshtein , "Andrew G. Malis" , Kireeti Kompella Content-Type: multipart/alternative; boundary="000000000000cdc629058e733e9e" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:35:13 -0000 --000000000000cdc629058e733e9e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per vendor= =E2=80=9D I don't know any network which would use "NMS per vendor" today. In fact the entire reason to develop your own NMS is to have your own interface to the network provisioning to be vendor agnostic. Best, R. On Wed, Jul 24, 2019 at 10:29 PM Jeff Tantsura wrote: > Robert, > > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per vendor= =E2=80=9D and hence a need > to agree on control plane protocol (PCEP). Abusing control plane for > configuration=E2=80=A6 been there :) > Specifically to PCEP point - PCEP creates ephemeral state, (not persisten= t > across reboots), and hence rather unsuitable for configuration. > > Cheers, > Jeff > On Jul 24, 2019, 4:21 PM -0400, Robert Raszuk , wrote: > > Jeff, > > > I think (sincerely hope) you are wrong, there=E2=80=99s a reason we hav= e spent > last 7 or so years working on YANG. > > Even if in the perfect universe all devices would support Yang models > uniformly - customers are still going to use their private NMS systems > except instead of CLI or xml as NNI to network elements they will use YAN= G > models. > > r. > > > > > > > --000000000000cdc629058e733e9e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

> Sure, my point was that you won=E2=80= =99t need a =E2=80=9CNMS per vendor=E2=80=9D=C2=A0=C2=A0

I don't know any network = which would use "NMS per vendor" today. In fact the entire reason= to develop your own NMS is to have your own interface to the network provi= sioning to be vendor agnostic.=C2=A0

Best,
R.

On Wed, Jul 24, 2019= at 10:29 PM Jeff Tantsura <j= efftant.ietf@gmail.com> wrote:
Robert,

Sure, my point was that you won=E2=80=99t need a =E2=80= =9CNMS per vendor=E2=80=9D and hence a need to agree on control plane proto= col (PCEP). Abusing control plane for configuration=E2=80=A6 been there :)
Specifically to PCEP point - PCEP creates ephemeral state= , (not persistent across reboots), and hence rather unsuitable for configur= ation.=C2=A0

Cheers,
Jeff
On Jul 24, 2019, 4:21 PM -0400, Robert Ra= szuk <robert@rasz= uk.net>, wrote:
Jeff,

> I think (sincerely hope) you are wrong, there=E2=80=99s a reason = we have spent last 7 or so years working on YANG.

Even if in the perfect universe all devices would support Yang models = uniformly - customers are still going to use their private NMS systems exce= pt instead of CLI or xml as NNI to network elements they will use YANG mode= ls.=C2=A0

r.






--000000000000cdc629058e733e9e-- From nobody Wed Jul 24 13:36:55 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D78DD1205F8 for ; Wed, 24 Jul 2019 13:36:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ENxcqKpFJIsw for ; Wed, 24 Jul 2019 13:36:51 -0700 (PDT) Received: from mail-qt1-x82d.google.com (mail-qt1-x82d.google.com [IPv6:2607:f8b0:4864:20::82d]) (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 DF0A1120494 for ; Wed, 24 Jul 2019 13:36:50 -0700 (PDT) Received: by mail-qt1-x82d.google.com with SMTP id d23so46912656qto.2 for ; Wed, 24 Jul 2019 13:36:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version; bh=3ZaxgV/DnQUIPKtNgY3ygT+MGB6XVY0Xit4S21ZGgNg=; b=uzmUxEfANc37mZFTYdWVaprSivwcNN23XGZ+ehGzsdygY0NscN2rxiCxagJJCZM1w+ lVqGziDFK+IFXE+/6syqlw5/zXriejMTRaoySMhijFJR26a8wC36UqgxR5kdU1fV9Lqr YBmCh0SkW4LL3S471THRC+3fUnVOrnmOpJc6IyQfGcUX05tP9mIwhoDYkmkJ9lHkGejp t1JGwENpkT5tDD580PEBogmj+rNfebSC1fC7BZISDGiqo1116G79YPtAgjjrgSy1XtrB JJwLUJ7byp1UgqUUME8fWzk0qejfywoOQD+Q9vKhNzXO0ox/ZV6rrQBhYxRDwQ7PZA6d 1VHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version; bh=3ZaxgV/DnQUIPKtNgY3ygT+MGB6XVY0Xit4S21ZGgNg=; b=pmBzxvMnDfwf6gB2eHMlrmYl57VEu5cFfg+QQObGd1f9Vp56OE4Sr3KAueO0zsPPfN Jic3kidqgcKAjSiPIXeXBJ0BtIQbzR+tg/IitINZgv+bEn55FmFIM3cn656qjLfvP+Av TB+uBj8xQxYOBbF3OXNY2igO1p/UP2wpRHnSB2kyJV/6IzDlroT6tFj4qRslQlr53+3r q+U83LwAlx/1CabvR1oCSgNmdZGvp0VFndkwwwJHpGSflZw9ySMgBGPc8r/lYpQ3PcID lsCExWygDJca6rKPpvaZvUkkBp8QcAN5WjksUoyOl9mz50TanM88hZ5FI1K57ob4ijKW rgZw== X-Gm-Message-State: APjAAAVRkHeLS02qkihFv5nX2WjiBi9xU6diT1apNE4NtI8uRias9cLG nANHts8UDQ8LBGgx/HA1ZRs= X-Google-Smtp-Source: APXvYqxjSRCLeBf40e+qPo7JmcaOnaOCLwaXo056M54H8R9lRGXYsLhwJo75Akgl+uDPbA1KQWaa2Q== X-Received: by 2002:a0c:a8d1:: with SMTP id h17mr60248206qvc.117.1564000610077; Wed, 24 Jul 2019 13:36:50 -0700 (PDT) Received: from [2001:67c:1232:144:2083:8e8c:ff7f::] ([2001:67c:1232:144:cd8d:8bfe:dd2a:67e5]) by smtp.gmail.com with ESMTPSA id b13sm29224077qtk.55.2019.07.24.13.36.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 13:36:49 -0700 (PDT) Date: Wed, 24 Jul 2019 16:36:43 -0400 From: Jeff Tantsura To: Robert Raszuk Cc: vahid tavajjohi , SPRING WG List , Alexander Vainshtein , "Andrew G. Malis" , Kireeti Kompella Message-ID: <67e17b21-f9f7-4dc4-9073-9706d4095935@Spark> In-Reply-To: References: <85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark> X-Readdle-Message-ID: 67e17b21-f9f7-4dc4-9073-9706d4095935@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d38c160_3fa62aca_12dc6" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:36:53 -0000 --5d38c160_3fa62aca_12dc6 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline some disagree: =22Hi all, I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy t= o manage global SID allocation with multi-vendor environment alongside mu= lti-NMS. Therefore, PCE (standard) is better choice. Regards, Vahid =22 Cheers, Jeff On Jul 24, 2019, 4:35 PM -0400, Robert Raszuk , wrot= e: > > > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per ven= dor=E2=80=9D > > I don't know any network which would use =22NMS per vendor=22 today. In= fact the entire reason to develop your own NMS is to have your own inter= face to the network provisioning to be vendor agnostic. > > Best, > R. > > > On Wed, Jul 24, 2019 at 10:29 PM Jeff Tantsura wrote: > > > Robert, > > > > > > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per v= endor=E2=80=9D and hence a need to agree on control plane protocol (PCEP)= . Abusing control plane for configuration=E2=80=A6 been there :) > > > Specifically to PCEP point - PCEP creates ephemeral state, (not per= sistent across reboots), and hence rather unsuitable for configuration. > > > > > > Cheers, > > > Jeff > > > On Jul 24, 2019, 4:21 PM -0400, Robert Raszuk = , wrote: > > > > Jeff, > > > > > > > > > I think (sincerely hope) you are wrong, there=E2=80=99s a reaso= n we have spent last 7 or so years working on YANG. > > > > > > > > Even if in the perfect universe all devices would support Yang mo= dels uniformly - customers are still going to use their private NMS syste= ms except instead of CLI or xml as NNI to network elements they will use = YANG models. > > > > > > > > r. > > > > > > > > > > > > > > > > > > > > > > > > --5d38c160_3fa62aca_12dc6 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
some disagree:

=22Hi all,

I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy t= o manage global SID allocation with multi-vendor environment alongside mu= lti-NMS. Therefore, PCE (standard) is better choice.

Regards,
Vahid
=22&=23160;

Cheers,
Jeff
On Jul 24, 2019, 4:35 PM -0400, Rob= ert Raszuk <rraszuk=40gmail.com>, wrote:

> Sure, my point was that you won=E2=80=99t need a =E2= =80=9CNMS per vendor=E2=80=9D&=23160;&=23160;

I don't know any network which would use =22= NMS per vendor=22 today. In fact the entire reason to develop your own NM= S is to have your own interface to the network provisioning to be vendor = agnostic.&=23160;

Best,
R.

On Wed, Jul 24, 2019 at 1= 0:29 PM Jeff Tantsura <jefftant.ietf=40gmail.com> wrote:
Robert,

Sure, my point was that you won=E2=80=99t need a =E2= =80=9CNMS per vendor=E2=80=9D and hence a need to agree on control plane = protocol (PCEP). Abusing control plane for configuration=E2=80=A6 been th= ere :)
Specifically to PCEP point - PCEP creates ephemeral= state, (not persistent across reboots), and hence rather unsuitable for = configuration.&=23160;

Cheers,
Jeff
On Jul 24, 2019, 4:21 PM -0400, Rob= ert Raszuk <robert=40raszuk.net>, wrote:
Jeff,

> I think (sincerely hope) you are wrong, there=E2=80=99s a reaso= n we have spent last 7 or so years working on YANG.

Even if in the perfect universe all devices would support Yang model= s uniformly - customers are still going to use their private NMS systems = except instead of CLI or xml as NNI to network elements they will use YAN= G models.&=23160;

r.






--5d38c160_3fa62aca_12dc6-- From nobody Wed Jul 24 13:41:37 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8280212060C for ; Wed, 24 Jul 2019 13:41:36 -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, 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=raszuk.net 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 X6oblJnzYm0n for ; Wed, 24 Jul 2019 13:41:34 -0700 (PDT) Received: from mail-qt1-x830.google.com (mail-qt1-x830.google.com [IPv6:2607:f8b0:4864:20::830]) (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 49ABD120494 for ; Wed, 24 Jul 2019 13:41:34 -0700 (PDT) Received: by mail-qt1-x830.google.com with SMTP id x22so41965548qtp.12 for ; Wed, 24 Jul 2019 13:41:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raszuk.net; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=XF8HJ/2eQXzr2Igd7kGvdhozmaz5FPN0ybz9slcxlCM=; b=NqX/Ngbzl9ab8RYn1modX1mDyMB930YTt4zmbWaU31CT1T/XrwBiNtWLtn+p9O81rG coOHu5rZ+jzTsW++I9izezepes9FrTRaCypebLYxVoLAgNLJG+jC+YZd3gmVm/GQqeeg c5Z2c++ZlkV/Nu2WJWY+soDP5h2BHLCOsYIYF2hrp1N+ASP2T7VYLZ5cUEGa7+hSPdrK G7VGl0MXHIAfC4PJzX7viDXd/S7oWRJ2xs8D2myZ9EmVmaPGelMdAmwlXGK4qZSMiglG NLwDZSQEl2A30Ff6wu/o6Tcoca92Dt8M4C+1rzXRs6JQF2tY3GfZqXDb8jfvxWFI8OVJ e//g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=XF8HJ/2eQXzr2Igd7kGvdhozmaz5FPN0ybz9slcxlCM=; b=MPrIRz1ryoDlVKOHEHQMMGhSS0EeqlHm7WUDITTLpXCQT3V/j0mCpwzhDJiEHXyIJ0 3nsrn4n34yI4FpNHRvginZqhwUZcgWgPXeuuynoBDQGgDZFs1tUrKf1SPGDGt7IMqEzD 4sDD4DPvjyhIuS5MXVgtm8L1zAVVN72xht8dOLVr3zjwvTQjQjIZ1DWIABwKbg1xW7MJ Uh8sygu9BEwHUfqroe0O2t5vSz1n0Zj8PxjiUlj1INSsYRwkabLHY01yGO/GZmPklEVd wWP3OuZl2S/+lffW1efG0iwj53UO9oZYss/k3fN+pyEoP/o7/yTrwbqjvwzxzgkDeXpJ IYxQ== X-Gm-Message-State: APjAAAU+eWocP1xwO6pqKmJXSs4PvAAHYxcCv7+mIIShy2xy1iGKW+96 QAuN3a+WBDu1+GcmOEInFV0SWQQEfGkWtwd1VTX+Hg== X-Google-Smtp-Source: APXvYqw7L1EeJLGYxJSiUigZznpcHOrAodaFGZjnH1mL65AxljF5tD8JEavOhbrkn2Fo81sRQE8ReJJU8mThn+HpVdk= X-Received: by 2002:ad4:4562:: with SMTP id o2mr61275242qvu.116.1564000893356; Wed, 24 Jul 2019 13:41:33 -0700 (PDT) MIME-Version: 1.0 References: <85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark> <67e17b21-f9f7-4dc4-9073-9706d4095935@Spark> In-Reply-To: <67e17b21-f9f7-4dc4-9073-9706d4095935@Spark> From: Robert Raszuk Date: Wed, 24 Jul 2019 22:41:25 +0200 Message-ID: To: Jeff Tantsura Cc: Robert Raszuk , vahid tavajjohi , Alexander Vainshtein , "Andrew G. Malis" , SPRING WG List , Kireeti Kompella Content-Type: multipart/alternative; boundary="000000000000ad5edd058e7355b2" Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 20:41:37 -0000 --000000000000ad5edd058e7355b2 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Jeff, Please re-read my msg :) I said that regardless what vendors will offer - those who actually run the network will have their own *single* NMS to configure it in a fully vendor independent way. Take care, R. On Wed, Jul 24, 2019 at 10:36 PM Jeff Tantsura wrote: > some disagree: > > "Hi all, > > I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy t= o manage > global SID allocation with multi-vendor environment alongside multi-NMS. > Therefore, PCE (standard) is better choice. > > Regards, > Vahid > " > > Cheers, > Jeff > On Jul 24, 2019, 4:35 PM -0400, Robert Raszuk , wrote: > > > > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per vendo= r=E2=80=9D > > I don't know any network which would use "NMS per vendor" today. In fact > the entire reason to develop your own NMS is to have your own interface t= o > the network provisioning to be vendor agnostic. > > Best, > R. > > On Wed, Jul 24, 2019 at 10:29 PM Jeff Tantsura > wrote: > > Robert, > > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per vendor= =E2=80=9D and hence a need > to agree on control plane protocol (PCEP). Abusing control plane for > configuration=E2=80=A6 been there :) > Specifically to PCEP point - PCEP creates ephemeral state, (not persisten= t > across reboots), and hence rather unsuitable for configuration. > > Cheers, > Jeff > On Jul 24, 2019, 4:21 PM -0400, Robert Raszuk , wrote: > > Jeff, > > > I think (sincerely hope) you are wrong, there=E2=80=99s a reason we hav= e spent > last 7 or so years working on YANG. > > Even if in the perfect universe all devices would support Yang models > uniformly - customers are still going to use their private NMS systems > except instead of CLI or xml as NNI to network elements they will use YAN= G > models. > > r. > > > > > > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --000000000000ad5edd058e7355b2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Jeff,

Please re-read my msg :)=C2=A0

I said that regardless what vendors will offer - tho= se who actually run the network will have their own *single* NMS to configu= re it in a fully vendor independent way.=C2=A0

Tak= e care,
R.

On Wed, Jul 24, 2019 at 10:36 PM Jeff Tantsura &l= t;jefftant.ietf@gmail.com>= ; wrote:
some disagree:

"Hi all,

I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy to = manage global SID allocation with multi-vendor environment alongside multi-= NMS. Therefore, PCE (standard) is better choice.

Regards,
Vahid
"=C2=A0

Cheers,
Jeff
On Jul 24, 2019, 4:35 PM -0400, Robert Ra= szuk <rraszuk@gma= il.com>, wrote:
<= br>
&= gt; Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per vendo= r=E2=80=9D=C2=A0=C2=A0

I don't know any network which would use "NMS p= er vendor" today. In fact the entire reason to develop your own NMS is= to have your own interface to the network provisioning to be vendor agnost= ic.=C2=A0

Best,
R.

On Wed, Jul 24, 2019 at 10:29 PM Jeff= Tantsura <= jefftant.ietf@gmail.com> wrote:
Robert,

Sure, my point was that you won=E2=80=99t need a =E2=80= =9CNMS per vendor=E2=80=9D and hence a need to agree on control plane proto= col (PCEP). Abusing control plane for configuration=E2=80=A6 been there :)
Specifically to PCEP point - PCEP creates ephemeral state= , (not persistent across reboots), and hence rather unsuitable for configur= ation.=C2=A0

Cheers,
Jeff
On Jul 24, 2019, 4:21 PM -0400, Robert Ra= szuk <robert@rasz= uk.net>, wrote:
Jeff,

> I think (sincerely hope) you are wrong, there=E2=80=99s a reason = we have spent last 7 or so years working on YANG.

Even if in the perfect universe all devices would support Yang models = uniformly - customers are still going to use their private NMS systems exce= pt instead of CLI or xml as NNI to network elements they will use YANG mode= ls.=C2=A0

r.






_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
--000000000000ad5edd058e7355b2-- From nobody Wed Jul 24 14:41:32 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A89361203B8 for ; Wed, 24 Jul 2019 14:41:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id J7DCCMsCERhy for ; Wed, 24 Jul 2019 14:41:28 -0700 (PDT) Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) (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 AACF5120159 for ; Wed, 24 Jul 2019 14:41:27 -0700 (PDT) Received: by mail-wr1-x433.google.com with SMTP id r1so48483590wrl.7 for ; Wed, 24 Jul 2019 14:41:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=ixY2FI2gk841pMjqqdhxb8nNqcxMDSXjGhO65p780iA=; b=oI+M9KO0mHPNvhC8j/LqHHczxaP9RMFFtIdPng/Fw0QnvANnwCfRKT99zmhEL8tlS7 PXHpyvWW8Z5yIK0m1y7Azy1qTvBKrC788bP7PDRN9HiG2mztDOuiJFJSO/eBCYiI8mfP cs/SKGH7zvzbFbSBYFNyvkDoZf5lip4ExQCLoa3Rs5x5NaYnvZltp+cvMet5lUf5vwGt oDFJmQ/f/X138RUzwZSG5zA/evJwp6zOJixmUcl1HFHhZzLcN4I6+XN5wZyWgiLxdb/Y iT6ZPRjzsl/4B6YU4JwwY9q6hfq90DQrZFGvKXmVQfIkvzmuAzCn2msL2/nm9p5Yp0e4 eLYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=ixY2FI2gk841pMjqqdhxb8nNqcxMDSXjGhO65p780iA=; b=srOOlzKwrEQP1iyegqGdgeTvEAurWCoT84IHbTF1TI2orOntxw4ej1AQgXJtNMkOVJ XAKBS5miiWeC/XMG67RQr9WLbTjNHCDTk++NcJL/ZwcFrr7bmMJbWP8TgxlZDYaZ9k0o sBx5CVcpglpDKpnIdnfbySQ6SDuntuTVsesZUkesTVDMo6jTGbYnJP46D5VV5anAUXf7 N/bahYSoZW//85W4wLBpcnYzaywdLyvDWorNmlTAwCqYJj8s7D+hmjOEzcdXZyODmRXq QQwwLbiU6XiOhHvEuvtBa3vfTG0yCKwVnbeY9Zl9w048NH5kA06i7JUrvXq1wQIcWI9c hvpA== X-Gm-Message-State: APjAAAU+5CjinNbT8WNLwq9aG5ozzroLjZL+eymWSV+8/W88tBx3WGwp Hck7xdqwIl65AfS8ltLCLMg= X-Google-Smtp-Source: APXvYqz2CR8otghnVmuOwDmESE8XrwJJ/epbKkYZZKA1sCcDxNh8AJ1oM5BFD84MG2OdPFnfHR5UkA== X-Received: by 2002:adf:dcc6:: with SMTP id x6mr61226968wrm.322.1564004485965; Wed, 24 Jul 2019 14:41:25 -0700 (PDT) Received: from [192.168.1.35] ([2.176.136.85]) by smtp.gmail.com with ESMTPSA id b8sm60449543wmh.46.2019.07.24.14.41.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 14:41:25 -0700 (PDT) From: vahid tavajjohi Message-Id: Content-Type: multipart/alternative; boundary="Apple-Mail=_9B268A75-14F4-4AF6-B038-0E0C9A552AEF" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 25 Jul 2019 02:11:18 +0430 In-Reply-To: Cc: Jeff Tantsura , Robert Raszuk , Alexander Vainshtein , "Andrew G. Malis" , SPRING WG List , Kireeti Kompella To: Robert Raszuk References: <85a590d8-0eab-4627-a466-4ccf9008e3a6@Spark> <67e17b21-f9f7-4dc4-9073-9706d4095935@Spark> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Managing "global" SIDs X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2019 21:41:31 -0000 --Apple-Mail=_9B268A75-14F4-4AF6-B038-0E0C9A552AEF Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Jeff and Robert, Yes, I agree with you but I am still seeing networks that uses = multi-NMS(in my region). So, my point is it will be better to provide = options that customers decide about it depend on their network not = strict option. NMS, PCE, YANG, and etc. SID allocation are all options = that needs to be in market. Regards, Vahid vahid.tavajjohi@gmail.com > On Jul 25, 2019, at 1:11 AM, Robert Raszuk wrote: >=20 > Jeff, >=20 > Please re-read my msg :)=20 >=20 > I said that regardless what vendors will offer - those who actually = run the network will have their own *single* NMS to configure it in a = fully vendor independent way.=20 >=20 > Take care, > R. >=20 > On Wed, Jul 24, 2019 at 10:36 PM Jeff Tantsura = > wrote: > some disagree: >=20 > "Hi all, >=20 > I think each vendor will uses its own NMS. So, it can=E2=80=99t be = easy to manage global SID allocation with multi-vendor environment = alongside multi-NMS. Therefore, PCE (standard) is better choice. >=20 > Regards, > Vahid > "=20 >=20 > Cheers, > Jeff > On Jul 24, 2019, 4:35 PM -0400, Robert Raszuk >, wrote: >>=20 >> > Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per = vendor=E2=80=9D =20 >>=20 >> I don't know any network which would use "NMS per vendor" today. In = fact the entire reason to develop your own NMS is to have your own = interface to the network provisioning to be vendor agnostic.=20 >>=20 >> Best, >> R. >>=20 >> On Wed, Jul 24, 2019 at 10:29 PM Jeff Tantsura = > wrote: >> Robert, >>=20 >> Sure, my point was that you won=E2=80=99t need a =E2=80=9CNMS per = vendor=E2=80=9D and hence a need to agree on control plane protocol = (PCEP). Abusing control plane for configuration=E2=80=A6 been there :) >> Specifically to PCEP point - PCEP creates ephemeral state, (not = persistent across reboots), and hence rather unsuitable for = configuration.=20 >>=20 >> Cheers, >> Jeff >> On Jul 24, 2019, 4:21 PM -0400, Robert Raszuk >, wrote: >>> Jeff, >>>=20 >>> > I think (sincerely hope) you are wrong, there=E2=80=99s a reason = we have spent last 7 or so years working on YANG. >>>=20 >>> Even if in the perfect universe all devices would support Yang = models uniformly - customers are still going to use their private NMS = systems except instead of CLI or xml as NNI to network elements they = will use YANG models.=20 >>>=20 >>> r. >>>=20 >>>=20 >>>=20 >>>=20 >>>=20 >>>=20 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring = --Apple-Mail=_9B268A75-14F4-4AF6-B038-0E0C9A552AEF Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Jeff = and Robert,

Yes, I = agree with you but I am still seeing networks that uses multi-NMS(in my = region). So, my point is it will be better to provide options that = customers decide about it depend on their network not strict option. = NMS, PCE, YANG, and etc. SID allocation are all options that needs to be = in market.

Regards,
Vahid

vahid.tavajjohi@gmail.com

On Jul 25, 2019, at 1:11 AM, Robert Raszuk <robert@raszuk.net> = wrote:

Jeff,

Please re-read my msg :) 

I said that regardless what vendors = will offer - those who actually run the network will have their own = *single* NMS to configure it in a fully vendor independent = way. 

Take = care,
R.

On Wed, Jul = 24, 2019 at 10:36 PM Jeff Tantsura <jefftant.ietf@gmail.com> wrote:
some disagree:

"Hi all,

I think each vendor will uses its own NMS. So, it can=E2=80=99t be easy = to manage global SID allocation with multi-vendor environment alongside = multi-NMS. Therefore, PCE (standard) is better choice.

Regards,
Vahid
" 

Cheers,
Jeff
On Jul 24, 2019, 4:35 PM = -0400, Robert Raszuk <rraszuk@gmail.com>, wrote:

> Sure, = my point was that you won=E2=80=99t need a =E2=80=9CNMS per = vendor=E2=80=9D  

I don't = know any network which would use "NMS per vendor" today. In fact the = entire reason to develop your own NMS is to have your own interface to = the network provisioning to be vendor agnostic. 

Best,
R.

On Wed, Jul 24, 2019 at 10:29 PM = Jeff Tantsura <jefftant.ietf@gmail.com> wrote:
Robert,

Sure, my point was that you won=E2=80=99t = need a =E2=80=9CNMS per vendor=E2=80=9D and hence a need to agree on = control plane protocol (PCEP). Abusing control plane for = configuration=E2=80=A6 been there :)
Specifically to PCEP point - PCEP creates = ephemeral state, (not persistent across reboots), and hence rather = unsuitable for configuration. 

C= heers,
Jeff
On Jul 24, 2019, 4:21 PM = -0400, Robert Raszuk <robert@raszuk.net>, wrote:
Jeff,

> I think (sincerely hope) you are wrong, there=E2=80=99= s a reason we have spent last 7 or so years working on YANG.

Even if in the perfect universe all devices would = support Yang models uniformly - customers are still going to use their = private NMS systems except instead of CLI or xml as NNI to network = elements they will use YANG models. 

r.






_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring
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= --Apple-Mail=_9B268A75-14F4-4AF6-B038-0E0C9A552AEF-- From nobody Wed Jul 24 17:50:06 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 00D081203E9 for ; Wed, 24 Jul 2019 17:50:04 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.497 X-Spam-Level: X-Spam-Status: No, score=-0.497 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, FROM_LOCAL_NOVOWEL=0.5, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Shzpr6va01yU for ; Wed, 24 Jul 2019 17:50:02 -0700 (PDT) Received: from mail-ot1-x32c.google.com (mail-ot1-x32c.google.com [IPv6:2607:f8b0:4864:20::32c]) (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 18B981205D1 for ; Wed, 24 Jul 2019 17:50:02 -0700 (PDT) Received: by mail-ot1-x32c.google.com with SMTP id r21so43822413otq.6 for ; Wed, 24 Jul 2019 17:50:02 -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=aaMNVBspsTPvhhP7pVtDH8jbA1hBqmRH/apiZTeRZqs=; b=ZRwRfMsWdXo91An1E5gM2//cwFuu2CJiiMZmhuHqiS1PLIXx+X4YDuLOeVO7D2+QT6 hUdNqswwYzh/eHTBNn7633Jl0d61I1xUnTtq43N8/pAZLd/AbF75MxaJldRJVN+1oPhZ 791LEujao7fF0Twaf82Ow1ZllGBr87k2GudUPtY1kvIJwy95S79P+W+ww0yWSRVLRXfB vELd3FV6fYsa1VwjKgaMT7QAicV1YXPAOURBlDvYxtCNBQY3O/Dwm7vcH2xTcultRLSd ZKmg5bLgAjJVMknBfqaROhPbXZx6snya3Kn9vr7C0vNF4qlyoua0Yd55eEEksePIjDSW 2PHg== 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=aaMNVBspsTPvhhP7pVtDH8jbA1hBqmRH/apiZTeRZqs=; b=j23PMvTbu2lKtnAQBKJOM/ba6RMvJWmgPUTLiubeF+hElZ/K4AtNK2F6q4DBCMFwpA qI8l4YMpQBuByp5+n6nGn1ct0LdGNPCXSNNqcgrX4f5F0zUZyI1C+WwhzHoA+XZak2rR sxVq9hYuNKmh4dJtjJDAzUjD8MtWeZM+bOaohca4HmGPFlSG8uxkRjn84LZfvqmR/uFe XPd+So9sSAb9AIm1UAWVjVKXZG7ARpEJIvnXHFOhW7Y5f8sRgZjwpnbHSrjRosDE5+BT QpFhNebT8QlOWc8BZ85H7ynfujQKpuqnW/irqwfPtpSlquS61TZJKLriDIsdVIfq01Dr QjcA== X-Gm-Message-State: APjAAAVahamgjuHurhM0GGKK2SKxcxaydQOYnSJfDVFI/+QOYQKjMiRP KESUhv2CSvbff3orT/aykQ8e8NEOxXEDnTI1QVBdZw== X-Google-Smtp-Source: APXvYqx4w4QqFizFsRW2GLtpTYNmchEEk/UCF0TbZ4DH6lG0ip10SpOMBWY0vRVQBbniMkZC8L0EaA0VsR/xNxcRH7U= X-Received: by 2002:a9d:66d0:: with SMTP id t16mr67324611otm.153.1564015801403; Wed, 24 Jul 2019 17:50:01 -0700 (PDT) MIME-Version: 1.0 References: <3DE71250-DC8C-4B3B-A1C9-56475A628043@lapishills.com> In-Reply-To: <3DE71250-DC8C-4B3B-A1C9-56475A628043@lapishills.com> From: Mark Smith Date: Thu, 25 Jul 2019 10:49:49 +1000 Message-ID: To: Dirk Steinberg Cc: SPRING WG Content-Type: multipart/alternative; boundary="000000000000440c07058e76ce99" Archived-At: Subject: Re: [spring] Approaches to MTU efficiency in SRv6 in todays SPRING session X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 00:50:04 -0000 --000000000000440c07058e76ce99 Content-Type: text/plain; charset="UTF-8" On Thu., 25 Jul. 2019, 02:20 Dirk Steinberg, wrote: > Hi All, > > in todays SPRING session we have heard concerns about > MTU efficiency in certain use cases involving SRv6. > > It is true that using 128 bit SRv6 SIDs trades scalability > and flexibility against MTU overhead. There will certainly > be use cases where the additional overhead may be > justified. > I can understand the convenience of SIDs being the same size as the underlying layer identifier. However, do they have to be? 128 bit SIDs is literally more SID values than there will ever be IPv6 unicast addresses (multicast has 1/8th the space). It's a larger space than the number of nodes than can be attached to the entire IPv6 Internet. What size would SIDs be if they were dimensioned only for the SR functions they're being and going to be used for, rather than just being sized to the lower layer identifier value? If MPLS based SIDs are 20 bits, and they do not have any SR functional constraints, I think that suggests SIDs can be far smaller than 128 bits, which then addresses the overhead problem 128 bit SIDs creates. > For other uses cases where MTU efficiency is a major concern > the answer within the SRv6 framework is SRv6 uSID. > > Another proposal to address the MTU efficiency problem today > advertised itself as basically using the same semantics as MPLS > encapsulated in IPv6 and also noted that SRv6 deviates from > legacy MPLS regarding label semantics. > > This is exactly the point. > > Not being dependent on the legacy MPLS label binding semantics > in SRv6 is a big advantage. > > And this advantage is carried forward in SRv6 uSID as well. > SRv6 uSID addresses the problem of MTU efficiency while > avoiding to fall back to MPLS label binding semantics. > > No separate mapping table is required to be able to forward uSID. > > It is also not true that uSID inflates the IGP and/or FIB tables > more than other approaches. A uSID is advertised just like > other SRv6 SIDs, although the prefix length will typically > be much shorter. The fact that no extra label mapping > table is required contributes to improved control and > data plane efficiency and provides excellent forwarding > ASIC efficiency, especially for low-FIB and legacy systems. > > Cheers > Dirk > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --000000000000440c07058e76ce99 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Thu., 25 Jul. 2019, 02:20 Dirk Steinberg, <dirk= @lapishills.com> wrote:
Hi A= ll,

in todays SPRING session we have heard concerns about
MTU efficiency in certain use cases involving SRv6.

It is true that using 128 bit SRv6 SIDs trades scalability
and flexibility against MTU overhead. There will certainly
be use cases where the additional overhead may be
justified.

I can understand the convenience of SIDs being the same size as t= he underlying layer identifier. However, do they have to be?

128 bit SIDs is literally more SID va= lues than there will ever be IPv6 unicast addresses (multicast has 1/8th th= e space). It's a larger space than the number of nodes than can be atta= ched to the entire IPv6 Internet.

What size would SIDs be if they were dimensioned only for the SR = functions they're being and going to be used for, rather than just bein= g sized to the lower layer identifier value?

If MPLS based SIDs are 20 bits, and they do not have a= ny SR functional constraints, I think that suggests SIDs can be far smaller= than 128 bits, which then addresses the overhead problem 128 bit SIDs crea= tes.



For other uses cases where MTU efficiency is a major concern
the answer within the SRv6 framework is SRv6 uSID.

Another proposal to address the MTU efficiency problem today
advertised itself as basically using the same semantics as MPLS
encapsulated in IPv6 and also noted that SRv6 deviates from
legacy MPLS regarding label semantics.

This is exactly the point.

Not being dependent on the legacy MPLS label binding semantics
in SRv6 is a big advantage.

And this advantage is carried forward in SRv6 uSID as well.
SRv6 uSID addresses the problem of MTU efficiency while
avoiding to fall back to MPLS label binding semantics.

No separate mapping table is required to be able to forward uSID.

It is also not true that uSID inflates the IGP and/or FIB tables
more than other approaches. A uSID is advertised just like
other SRv6 SIDs, although the prefix length will typically
be much shorter. The fact that no extra label mapping
table is required contributes to improved control and
data plane efficiency and provides excellent forwarding
ASIC efficiency, especially for low-FIB and legacy systems.

Cheers
Dirk

_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listi= nfo/spring
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charset=UTF-8 Content-Transfer-Encoding: base64 Archived-At: Subject: Re: [spring] Approaches to MTU efficiency in SRv6 in todays SPRING session X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 02:46:11 -0000 PFNuaXA+DQoNCj4gSXQgaXMgYWxzbyBub3QgdHJ1ZSB0aGF0IHVTSUQgaW5mbGF0ZXMgdGhlIElH UCBhbmQvb3IgRklCIHRhYmxlcw0KPiBtb3JlIHRoYW4gb3RoZXIgYXBwcm9hY2hlcy4gQSB1U0lE IGlzIGFkdmVydGlzZWQganVzdCBsaWtlDQo+IG90aGVyIFNSdjYgU0lEcywgYWx0aG91Z2ggdGhl IHByZWZpeCBsZW5ndGggd2lsbCB0eXBpY2FsbHkNCj4gYmUgbXVjaCBzaG9ydGVyLiBUaGUgZmFj dCB0aGF0IG5vIGV4dHJhIGxhYmVsIG1hcHBpbmcNCj4gdGFibGUgaXMgcmVxdWlyZWQgY29udHJp YnV0ZXMgdG8gaW1wcm92ZWQgY29udHJvbCBhbmQgDQo+IGRhdGEgcGxhbmUgZWZmaWNpZW5jeSBh bmQgcHJvdmlkZXMgZXhjZWxsZW50IGZvcndhcmRpbmcgDQo+IEFTSUMgZWZmaWNpZW5jeSwgZXNw ZWNpYWxseSBmb3IgbG93LUZJQiBhbmQgbGVnYWN5IHN5c3RlbXMuDQoNCkkgZG9uJ3QgYWdyZWUg d2l0aCB0aGlzIC0gYW5kIGhlcmUgaXMgd2h5Og0KDQpUbyB1c2UgdVNJRCAtIEkgZWl0aGVyIGhh dmUgdG8gdXNlIGEgbG9jYXRvciBJRCBpbiBhZGRpdGlvbmFsIHRvIG15IG5vcm1hbCBsb29wYmFj ayAtIG9yIC0gaW4gdGhlIGFsdGVybmF0aXZlIC0gcmVudW1iZXIgdGhpbmdzIHN1Y2ggdGhhdCBt eSBub3JtYWwgbG9vcGJhY2sgbnVtYmVyaW5nIHNjaGVtZSB3b3VsZCBiZSBzdWNoIHRoYXQgc2hp ZnRpbmcgb24gdGhlIGFkZHJlc3Mgd291bGQgbm90IGJyZWFrIHRoaW5ncyBvbiB0aGUgbmV0d29y ay4gIFRoZSBsYXR0ZXIgb3B0aW9uIGluIGEgbGFyZ2UgbmV0d29yayBpcyBlbnRpcmVseSBhbmQg dG90YWxseSBpbXByYWN0aWNhbCBpbiBteSB2aWV3IC0gc28gLSB0aGF0IG1lYW5zIC0gSSBub3cg bmVlZCB0byBhZGQgYSBzZWNvbmQgYWRkcmVzcyB0byBldmVyeSByb3V0ZXIgaW4gb3JkZXIgdG8g dXNlIHRoaXMuICBUaGlzIGRvdWJsZXMgdGhlIG51bWJlciBvZiBsb29wYmFja3MgaW4gdGhlIElH UCBmb3IgZXZlcnkgbm9kZSB0aGF0IEkgd2lzaCB0byB1c2UgYSB1U0lEIG9uLCBzaW5jZSBJIG5v dyBoYXZlIHRoZSBvcmlnaW5hbCBsb29wYmFjayAtIGFuZCB0aGUgYWRkcmVzcyB0aGF0IEkgd2lz aCB0byB1c2UgZm9yIHN0ZWVyaW5nLiAgSW4gYSBDUkggY29udGV4dCAtIGJlY2F1c2Ugb2YgdGhl IGRlLWNvdXBsaW5nIG9mIHRoZSBTSUQgYW5kIHRoZSBhZGRyZXNzIC0gdGhlcmUgaXMgYWJzb2x1 dGVseSBubyBwcm9ibGVtIHdpdGggYXBwbHlpbmcgdGhlIFNJRCdzIHRvIHRoZSBvcmlnaW5hbCBs b29wYmFja3MgLSBhbmQgbm8gaW5jcmVhc2UgaW4gdGhlIElHUC4NCg0KRnVydGhlcm1vcmUsIHRo ZSBhZGRpdGlvbmFsIGxvY2F0b3IgYWRkcmVzc2VzIEkgYW0gbm93IGFwcGx5aW5nIC0gYmVjYXVz ZSB0aGV5IGFyZSBpbiBlZmZlY3QganVzdCBhbm90aGVyIHY2IGFkZHJlc3MgLSB3aWxsIHByb3Bh Z2F0ZSB0aHJvdWdoIHRoZSBJR1AgdG8gZXZlcnkgc2luZ2xlIGRldmljZSAtIGlycmVzcGVjdGl2 ZSBvZiBpZiB0aGF0IGRldmljZSBuZWVkcyB0byBrbm93IGFib3V0IGl0IG9yIG5vdCAtIHRoaXMg bWVhbnMgdGhhdCBvbiB0aGUgbGVnYWN5IGhhcmR3YXJlIHRoYXQgaGFzIGxvdyBmaWIgY291bnRz IC0gSSB3aWxsIHNlZSBhbiBpbXBhY3QuICBJIGRvIG5vdCBuZWVkIGxvY2F0b3IgU0lEJ3MgaW4g YWRkaXRpb24gdG8gbXkgbm9ybWFsIGxvb3BiYWNrcyB3aXRoIENSSCAtIHNvIC0gaW4gaW5mbGF0 ZXMgdGhlIElHUCBpbiBteSBleWVzLg0KDQpJbiBhIGxhcmdlIG5ldHdvcmsgLSB3aGVyZSBhIGxv dCBvZiBzdGVlcmluZyBpcyBoYXBwZW5pbmcgLSBhbmQgeW91IGhhdmUgYSBsYXJnZSBudW1iZXIg b2YgZGV2aWNlcyB0aHJvdWdoIHdoaWNoIHlvdSBhcmUgZ29pbmcgdG8gbmVlZCB0byBzdGVlciAt IHRoaXMgY2FuIGFjdHVhbGx5IGhhdmUgcXVpdGUgYSBzZXJpb3VzIGltcGFjdC4NCg0KVGhhbmtz DQoNCkFuZHJldw0KDQoNCg== From nobody Thu Jul 25 05:32:53 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 08BEF12016A for ; 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Thu, 25 Jul 2019 05:32:45 -0700 (PDT) Received: from macpro.fritz.box ([92.118.254.40]) by smtp.gmail.com with ESMTPSA id b8sm63040473wmh.46.2019.07.25.05.32.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 25 Jul 2019 05:32:45 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_3306123B-E725-4D6B-8015-179365839ADC" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: Dirk Steinberg In-Reply-To: Date: Thu, 25 Jul 2019 14:32:44 +0200 Cc: SPRING WG Message-Id: <529FC0A3-43D6-4A13-B866-E14477B8F140@lapishills.com> References: <3DE71250-DC8C-4B3B-A1C9-56475A628043@lapishills.com> To: Mark Smith X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [spring] Approaches to MTU efficiency in SRv6 in todays SPRING session X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 12:32:50 -0000 --Apple-Mail=_3306123B-E725-4D6B-8015-179365839ADC Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii > Am 25.07.2019 um 02:49 schrieb Mark Smith : >=20 > On Thu., 25 Jul. 2019, 02:20 Dirk Steinberg, > wrote: > Hi All, >=20 > in todays SPRING session we have heard concerns about=20 > MTU efficiency in certain use cases involving SRv6. >=20 > It is true that using 128 bit SRv6 SIDs trades scalability > and flexibility against MTU overhead. There will certainly > be use cases where the additional overhead may be > justified. >=20 > I can understand the convenience of SIDs being the same size as the = underlying layer identifier. However, do they have to be? >=20 > 128 bit SIDs is literally more SID values than there will ever be IPv6 = unicast addresses (multicast has 1/8th the space). It's a larger space = than the number of nodes than can be attached to the entire IPv6 = Internet. >=20 > What size would SIDs be if they were dimensioned only for the SR = functions they're being and going to be used for, rather than just being = sized to the lower layer identifier value? >=20 > If MPLS based SIDs are 20 bits, and they do not have any SR functional = constraints, I think that suggests SIDs can be far smaller than 128 = bits, which then addresses the overhead problem 128 bit SIDs creates. It is important to understand that 128 bit SIDs in SRv6=20 in most cases are semantically equivalent to 2 SIDs in SR-MPLS. This is because the SID contains both a=20 locator and a function part (and optionally also an argument). For example, assuming a 64:64 bit split in SRv6 the 64 bit locator identifies the router whereas the 64 bit function part identifies the function (plus optional arguments) which could be a VPN or an adjacency. So one SID in SRv6 is equivalent to one transport label plus one service label in MPLS. For a typical VPN use case that would be a 2 label stack consisting of the LDP or SR transport label leading to the egress PE and the VPN label. The same use case in SRv6 uses only one single SID. When doing an apples-to-apples comparison of SID sizes to MPLS label sizes the proper comparison would be=20 64 bit (for example, could also be longer or shorter) in SRv6 to 20 bit in MPLS. The 20 bit label size in MPLS is a serious limitation for=20 large-scale networks and data centers. Adding uSID into the picture allows the network architect to make his own choice regarding the tradeoff between identifier length=20 and MTU overhead. He may choose to use 64 bits or he can choose to use 16 bit SRv6 uSIDs. Note that the 16 bit size for uSID is only an example and in principle the designer could also choose=20 to use a different length for uSID, i.e. 32 bit. Also note that when using SRv6 uSID the semantics regarding locator and function are again like in MPLS, meaning that one uSID does NOT designate both locator and function but only one of the two. For a VPN use case you would need 2 uSIDs just like in MPLS. Assuming the vendor implementation of 32 bit uSID in SRv6 in=20 addition to 16 bits uSIDs the network designer would have a full=20 choice of identifier length: 16 bit, 32 bit (uSID) and 64 bit=20 (full SRv6 SID). > For other uses cases where MTU efficiency is a major concern=20 > the answer within the SRv6 framework is SRv6 uSID. >=20 > Another proposal to address the MTU efficiency problem today=20 > advertised itself as basically using the same semantics as MPLS=20 > encapsulated in IPv6 and also noted that SRv6 deviates from=20 > legacy MPLS regarding label semantics. >=20 > This is exactly the point.=20 >=20 > Not being dependent on the legacy MPLS label binding semantics > in SRv6 is a big advantage. >=20 > And this advantage is carried forward in SRv6 uSID as well. > SRv6 uSID addresses the problem of MTU efficiency while=20 > avoiding to fall back to MPLS label binding semantics. >=20 > No separate mapping table is required to be able to forward uSID. >=20 > It is also not true that uSID inflates the IGP and/or FIB tables > more than other approaches. A uSID is advertised just like > other SRv6 SIDs, although the prefix length will typically > be much shorter. The fact that no extra label mapping > table is required contributes to improved control and=20 > data plane efficiency and provides excellent forwarding=20 > ASIC efficiency, especially for low-FIB and legacy systems. >=20 > Cheers > Dirk >=20 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring = --Apple-Mail=_3306123B-E725-4D6B-8015-179365839ADC Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii
Am = 25.07.2019 um 02:49 schrieb Mark Smith <markzzzsmith@gmail.com>:

On Thu., 25 = Jul. 2019, 02:20 Dirk Steinberg, <dirk@lapishills.com> wrote:
Hi All,

in todays SPRING session we have heard concerns about
MTU efficiency in certain use cases involving SRv6.

It is true that using 128 bit SRv6 SIDs trades scalability
and flexibility against MTU overhead. There will certainly
be use cases where the additional overhead may be
justified.

I can = understand the convenience of SIDs being the same size as the underlying = layer identifier. However, do they have to be?

128 bit = SIDs is literally more SID values than there will ever be IPv6 unicast = addresses (multicast has 1/8th the space). It's a larger space than the = number of nodes than can be attached to the entire IPv6 = Internet.

What size would SIDs be if they were dimensioned = only for the SR functions they're being and going to be used for, rather = than just being sized to the lower layer identifier value?

If MPLS based SIDs are 20 bits, and they do not have any SR = functional constraints, I think that suggests SIDs can be far smaller = than 128 bits, which then addresses the overhead problem 128 bit SIDs = creates.

It = is important to understand that 128 bit SIDs in SRv6 
in = most cases are semantically equivalent to 2 SIDs = in
SR-MPLS. This is because the SID contains both = a 
locator and a function part (and optionally also an = argument).

For example, assuming a = 64:64 bit split in SRv6 the 64 bit locator
identifies the = router whereas the 64 bit function part identifies
the = function (plus optional arguments) which could be a VPN
or an = adjacency.

So one SID in SRv6 is = equivalent to one transport label plus
one service label in = MPLS. For a typical VPN use case that
would be a 2 label stack = consisting of the LDP or SR transport
label leading to the = egress PE and the VPN label.
The same use case in SRv6 uses = only one single SID.

When doing an = apples-to-apples comparison of SID sizes
to MPLS label sizes = the proper comparison would be 
64 bit  (for = example, could also be longer or shorter) in SRv6
to 20 bit in = MPLS.

The 20 bit label size in MPLS = is a serious limitation for 
large-scale networks and = data centers.

Adding uSID into the = picture allows the network architect to make
his own choice = regarding the tradeoff between identifier length 
and MTU = overhead. He may choose to use 64 bits or he can choose
to use = 16 bit SRv6 uSIDs. Note that the 16 bit size for uSID is
only = an example and in principle the designer could also = choose 
to use a different length for uSID, i.e. 32 = bit.

Also note that when using SRv6 = uSID the semantics regarding
locator and function are again = like in MPLS, meaning that one
uSID does NOT designate both = locator and function but only one
of the two. For a VPN use = case you would need 2 uSIDs just like
in MPLS.

Assuming the vendor implementation of 32 bit uSID = in SRv6 in 
addition to 16 bits uSIDs the network = designer would have a full 
choice of identifier length: = 16 bit, 32 bit (uSID) and 64 bit 
(full SRv6 = SID).

For other uses cases where MTU efficiency is a major concern
the answer within the SRv6 framework is SRv6 uSID.

Another proposal to address the MTU efficiency problem today
advertised itself as basically using the same semantics as MPLS
encapsulated in IPv6 and also noted that SRv6 deviates from
legacy MPLS regarding label semantics.

This is exactly the point.

Not being dependent on the legacy MPLS label binding semantics
in SRv6 is a big advantage.

And this advantage is carried forward in SRv6 uSID as well.
= SRv6 uSID addresses the problem of MTU efficiency while
avoiding to fall back to MPLS label binding semantics.

No separate mapping table is required to be able to forward uSID.

It is also not true that uSID inflates the IGP and/or FIB tables
more than other approaches. A uSID is advertised just like
other SRv6 SIDs, although the prefix length will typically
be much shorter. The fact that no extra label mapping
table is required contributes to improved control and
data plane efficiency and provides excellent forwarding
ASIC efficiency, especially for low-FIB and legacy systems.
=
Cheers
Dirk

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= --Apple-Mail=_3306123B-E725-4D6B-8015-179365839ADC-- From nobody Thu Jul 25 07:36:14 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3E56E1202B7; Thu, 25 Jul 2019 07:36:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XtArUoweZrJ0; Thu, 25 Jul 2019 07:35:59 -0700 (PDT) Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 41BCD12031A; Thu, 25 Jul 2019 07:35:53 -0700 (PDT) Received: by mail-lf1-x12e.google.com with SMTP id z15so30423849lfh.13; Thu, 25 Jul 2019 07:35:53 -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=OdUwEj+Y1PsmwZ/cwnLaCqG6MkW4gvhIISpzG6VHrLY=; b=IFmapY5Q0lg2klU/iuw7xuZIAfjJxjO4J0TN8EkZ3ajs2IsnMXrkeiABTTn3FKcKcn 3Uktqa4/EKUhJQYsTVC7vkebfPG7Ioird6/bY3J2lihwXtBVi3Zei44HfdQUcf5XVfzN 3TjZuyMy3TwMEC36gWfK5SpeVbi1qnzChaTR3xffrVW3iYaqiElwXpo2f6pidid5WzaB GbcncNSapZAdARbh8wMQrEt5vF6IDeTRmMiQbH3FXQF8sNELdW3BtoM3Wc9/1WRSOMPh X31wddxQh7kqAuLCzLxuOAhOfztFwhFxTc77ynoQA++KTIKiI9N3J17toHPx7s+tr8B/ gKmw== 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=OdUwEj+Y1PsmwZ/cwnLaCqG6MkW4gvhIISpzG6VHrLY=; b=CIwtOn6JYuoYZBg38UYj2PM3d/ZfG35I1lz9EDrZYqgNJjkEEYB2GLKYyxMWsjEsx6 bcRZTIq8Wqf5iqfgwzRNBjG8auXwPt/EKzlVWrCYKH1O8rIhu635WyUM3LLJSn3fS1Eg Vywa7hGlsqGUouHmgZTsWrEz+Ot1hr6mMNRfJjlDJRZZiozKOlR25Zjq4Ypk8NqCai6j f/FBWinYLe/GNJQwL6TyilbstRMFlXnGXDb7TcOQFTsCqyIkXBNO0tSrChYVgO8CwWd5 a6emDG5mBdNR2BRwwArb1jiYX+ppqKRswtUz7dV5NkUG7Hc3WWlqeLgeK596eyUxZcXt 6CeA== X-Gm-Message-State: APjAAAXidndzaCRT150RGvu0g3gitW81KXMy/U9BPSSd2MyuNYZw/hUy CSzFeJId8pCYwgIr6TG7IyFtuHyAdUc63szru6Y= X-Google-Smtp-Source: APXvYqyH43HCP2LTP20V0I24W+fSGk7coM+0Qx1Db81FM0V7yKTy04ejcBb7I9+QJJJ02FtCHwvC9ZsnRzZzvhYtBEw= X-Received: by 2002:ac2:5609:: with SMTP id v9mr39584775lfd.27.1564065351433; Thu, 25 Jul 2019 07:35:51 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Greg Mirsky Date: Thu, 25 Jul 2019 10:35:40 -0400 Message-ID: To: Shraddha Hegde Cc: "draft-ninan-spring-mpls-inter-as-oam@ietf.org" , "mpls@ietf.org" , spring , draft-mirsky-spring-bfd@ietf.org Content-Type: multipart/alternative; boundary="000000000000ad81c6058e825731" Archived-At: Subject: Re: [spring] Followup on my comments on draft-ninan-spring-mpls-inter-as-oam X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 14:36:07 -0000 --000000000000ad81c6058e825731 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Shraddha, thank you for your expedient response and consideration of the draft-mirsky-spring-bfd. Of course, both drafts can be developed and discussed separately. I hope that you'll kindly consider adding normative references to RFC 7110 and draft-mirsky-spring-bfd as the source of the idea of LSP Ping return path and the non-FEC Path TLV respectively. Regards, Greg Regards, Greg On Wed, Jul 24, 2019 at 2:23 PM Shraddha Hegde wrote= : > Hi Greg, > > > > Thanks for comments. > > I do see similarities in the protocol extensions although the usecases ar= e > different. > > IMO, it would be good to keep the usecase documents separate but work > together to > > Define protocol extension that can be used by both. > > > > Rgds > > Shraddha > > > > *From:* Greg Mirsky > *Sent:* Tuesday, July 23, 2019 10:29 AM > *To:* draft-ninan-spring-mpls-inter-as-oam@ietf.org; mpls@ietf.org; > spring > *Subject:* Followup on my comments on draft-ninan-spring-mpls-inter-as-oa= m > > > > Dear Authors, et al., > > I've wanted to continue with my comments to the draft you've presented at > MPLS WG meeting on Monday. As I've mentioned, please review > draft-mirsky-spring-bfd > and > Section 4 Use Non-FEC Path TLV in particular. Welcome your comments, > questions, and hope we can work together on the solution of our use cases= . > > > > Regards, > > Greg > --000000000000ad81c6058e825731 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Shraddha,
thank you for your expedient response and= consideration of the draft-mirsky-spring-bfd. Of course, both drafts can b= e developed and discussed separately. I hope that you'll kindly conside= r adding normative references to RFC 7110 and draft-mirsky-spring-bfd as th= e source of the idea of LSP Ping return path and the non-FEC Path TLV respe= ctively.

Regards,
Greg

Regards,
Greg

<= div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jul 24, 2019 at 2:23 PM Shradd= ha Hegde <shraddha@juniper.net> wrote:

Hi Greg,

=C2=A0

Thanks for comments.

I do see similarities in the protocol extensions alt= hough the usecases are different.

IMO, it would be good to keep the usecase documents = separate but work together to

Define protocol extension that can be used by both.<= u>

=C2=A0

Rgds

Shraddha

=C2=A0

From: Greg Mirsky <gregimirsky@gmail.com>
Sent: Tuesday, July 23, 2019 10:29 AM
To: draft-ninan-spring-mpls-inter-as-oam@ietf.org; mpls@ietf.org; spring <= ;spring@ietf.org&g= t;
Subject: Followup on my comments on draft-ninan-spring-mpls-inter-as= -oam

=C2=A0

Dear Authors, et al.,

I've wanted to continue with my comments to the = draft you've presented at MPLS WG meeting on Monday. As I've mentio= ned, please review=C2=A0draft-mirsky-spring-bfd=C2=A0and Section 4 Use Non-FEC Path TLV in particular. Welcome your comments, quest= ions, and hope we can work together on the solution of our use cases.

=C2=A0

Regards,

Greg

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<388c2499-b3be-4880-a4fe-d6201354d74a@Spark> References: <388c2499-b3be-4880-a4fe-d6201354d74a@Spark> X-Readdle-Message-ID: 7d256c65-0391-4b05-b3ca-fea1620e7a0e@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5d3a1348_368db37e_12dc6" Archived-At: Subject: [spring] IPR disclosure against draft-gandhi-spring-ioam-sr-mpls X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 20:38:42 -0000 --5d3a1348_368db37e_12dc6 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Dear chairs, I have contacted E/// IPR department, they will file the IPR ASAP (US10356227) Cheers, Jeff --5d3a1348_368db37e_12dc6 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Dear chairs,

I have contacted E/// IPR department, they will fil= e the IPR ASAP (US10356227)

Cheers,
Jeff
--5d3a1348_368db37e_12dc6-- From nobody Thu Jul 25 13:45:56 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A44311201D1 for ; Thu, 25 Jul 2019 13:45:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.597 X-Spam-Level: X-Spam-Status: No, score=-2.597 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, LOTS_OF_MONEY=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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 w14GxcM1Mzv9 for ; Thu, 25 Jul 2019 13:45:50 -0700 (PDT) Received: from relais-inet.orange.com (relais-inet.orange.com [80.12.70.35]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by 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<25340_1564087548_5D3A14FC_25340_283_3_53C29892C857584299CBF5D05346208A48BB91AF@OPEXCAUBM43.corporate.adroot.infra.ftgroup> References: <388c2499-b3be-4880-a4fe-d6201354d74a@Spark> <7d256c65-0391-4b05-b3ca-fea1620e7a0e@Spark> In-Reply-To: <7d256c65-0391-4b05-b3ca-fea1620e7a0e@Spark> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.114.13.247] Content-Type: multipart/alternative; boundary="_000_53C29892C857584299CBF5D05346208A48BB91AFOPEXCAUBM43corp_" MIME-Version: 1.0 Archived-At: Subject: Re: [spring] IPR disclosure against draft-gandhi-spring-ioam-sr-mpls X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Jul 2019 20:45:55 -0000 --_000_53C29892C857584299CBF5D05346208A48BB91AFOPEXCAUBM43corp_ Content-Type: text/plain; charset="utf-8" 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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=dSvnCK7i1idhxU1ZGHS4/FMZAW261gYXQSJ0kn+/idE=; b=j3oONyiYnblYmCswZO2G9hAgEJx1CaVMUoecQlJ6e/hPjiTbFM9cXydd2yeI3sbCpz hMm+KHaqDzFaxa5/sJ00rZfJifJR8L2GNGtgDC2mV+aZIO0dD5sjPj15WSpB1rdpUvVK SDPsFc8rPwdVllOmchgU3Tzr3uLTgx8jtb+ByMKcr64/UyvzQTnGrOaNSH1L2LWD71m6 bOSq2SRUPv65LbKIShG58DtayOnmbZZ/BXaAEeyqT5xH+Bwu70QuajJLm1qTvir+9AdB 1GN96v6j0ynzeVXUJxdJiLgn/uiMqOFq0zyiFTeJizE1inMfMvYWwlizz1LEobgku4Sh uixg== 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=dSvnCK7i1idhxU1ZGHS4/FMZAW261gYXQSJ0kn+/idE=; b=MSbXaMGwR8Do/p5Jhn/N0BXZD2vpnrYgQ92fFXIAhS9byO/P7FQY+hgAV1Q7XG3Urk Re3UChSbSRdu4XoJzH5wxsfY6h+Gxkri4Xyk6SGUqJEUCOTi3lNw1OOqr19maswJ3dMf r43TIFWXd1dAv0c6QUuaYtyHN+R1n884Rinx9MdGN/qlaerLlDgEg9l4ZDPL5EUxh14f 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Jul 2019 03:30:08 -0000 --000000000000507c77058e8d28e6 Content-Type: text/plain; charset="UTF-8" I synced up with PK in-person this morning and clarified his questions. I'm reproducing my response here on the list to keep record. The weights are specified per sub-candidate path. If the sub-candidate path is dynamic, the specified weight is distributed across the set of segment-lists as dynamically computed by the compute-engine. So for example, if the specified weight for the dynamic sub-candidate path is 3 and the computation result yielded 3 equal cost segment-lists, then the weight associated with each segment-list would be 1. If the sub-candidate path is explicit, the specified weight translates to the weight of the corresponding segment-list. Regards, -Pavan On Wed, Jul 24, 2019 at 1:23 PM Przemyslaw Krol wrote: > Hi Vishnu, > > Clarification question, if I may. > Are you envisioning weights to be normalized for all sub-candidate-paths > (regardless of the candidate-path they belong to), or rather propose to > have a 2-level split: > - weight for candidate-path grouping specific sub-candidate-paths defining > "global" share of traffic, in comparison with other candidate-paths > - weight for specific sub-candidate-path defining "local" share of the > traffic within specific candidate-path, in comparison with other > sub-candidate-paths in that particular candidate-path > > thanks, > pk > > On Wed, Jul 24, 2019 at 6:42 AM Vishnu Pavan Beeram < > vishnupavan.ietf@gmail.com> wrote: > >> Authors, Hi! >> >> There are some use-cases where the candidate-path (multipath) needs to be >> constructed in such a way that a part of the multipath (a set of >> segment-lists) uses one set of constraints, while the other part (another >> set of segment-lists) uses another set of constraints. Consider the >> scenario where the traffic needs to be steered onto a policy in such a way >> that a specified portion of it uses paths that traverse only blue links >> while the rest uses paths that traverse only red links. >> >> The current semantics of a candidate-path as defined in Section 2.2 of >> version 3 preclude such use-cases. It should be possible to let the >> semantics be a tad more flexible than they currently are and cater to the >> above scenario (and the likes of it). >> >> There are a few different ways of addressing this, but I would like to >> propose one that seems least disruptive. >> >> In addition to the currently specified semantics: >> -- A candidate path may comprise of a set of sub-candidate paths where >> each each sub-candidate path is either dynamic or explicit. The >> sub-candidate path is the unit of signaling of an SR policy between a >> headend and a controller.. >> >> Regards, >> -Pavan >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring >> > > > -- > Przemyslaw "PK" Krol | Strategic Network Engineer ing | pkrol@google.com > --000000000000507c77058e8d28e6 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I synced up with PK in-person this mornin= g and clarified his questions. I'm reproducing my response here on the = list to keep record.

The weights are specified per sub-candidate pa= th.

If the sub-candidate path is dynamic, the specified weight is d= istributed across the set of segment-lists as dynamically computed by the c= ompute-engine. So for example, if the specified weight for the dynamic sub-= candidate path is 3 and the computation result yielded 3 equal cost segment= -lists, then the weight associated with each segment-list would be 1.
<= br>If the sub-candidate path is explicit, the specified weight translates t= o the weight of the corresponding segment-list.

<= /div>
Regards,
-Pavan

On Wed, Jul 24, 2019 at 1:23 PM Prze= myslaw Krol <pkrol@google.com>= ; wrote:
Hi=C2=A0Vishnu,

Clarification question, if I m= ay.
Are you envisioning weights to be normalized for all sub-cand= idate-paths (regardless of the candidate-path they belong to), or rather pr= opose to have a 2-level split:
- weight=C2=A0for candidate-path g= rouping specific sub-candidate-paths defining "global" share of t= raffic, in comparison with other candidate-paths
- weight for spe= cific=C2=A0sub-candidate-path defining "local" share of the traff= ic within specific candidate-path, in comparison with other sub-candidate-p= aths in that particular=C2=A0candidate-path

thanks= ,
pk

On Wed, Jul 24, 2019 at 6:42 AM Vishnu Pavan Beeram <= ;vishnupava= n.ietf@gmail.com> wrote:
Authors, Hi!

There are some use-cases where the candidate-path (multipath) needs to be = constructed in such a way that a part of the multipath (a set of segment-li= sts) uses one set of constraints, while the other part (another set of segm= ent-lists) uses another set of constraints. Consider the scenario where the= traffic needs to be steered onto a policy in such a way that a specified p= ortion of it uses paths that traverse only blue links while the rest uses p= aths that traverse only red links.

The current sem= antics of a candidate-path as defined in Section 2.2 of version 3 preclude = such use-cases. It should be possible to let the semantics be a tad more fl= exible than they currently are and cater to the above scenario (and the lik= es of it).

There are a few different ways of a= ddressing this, but I would like to propose one that seems least disruptive= .

In addition to the currently specified semantics= :
-- A candidate path may comprise of a set of sub-candidate path= s where each each sub-candidate path is either dynamic or explicit. The sub= -candidate path is the unit of signaling of an SR policy between a headend = and a controller..

Regards,
-Pavan
_______________________________________________
spring mailing list
spring@ietf.org https://www.ietf.org/mailman/listinfo/spring


--
=
Przemyslaw "PK" K= rol |=C2=A0S= trategic Network Engineering |=C2=A0<= font color=3D"#1155cc">pkrol@google.com=C2=A0
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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello, I have gone though this draft and below are my thought with respect to CRH = comparison given in the draft 1. At ingress node has to more work by gathering individual micro sid . = for example Node A configured with micro sid FC00::A000/32 Node B with FC= 00::B0000/32. Now at ingress node has to concinnated these 2 micro sid into one FC00::A0= 00:B000: followed by of carrier which is 0000 . So this is more complex stuff introduced at ingress while programing path. 1. Even shifting of bit are hardware friendly , it is still more work t= hen normal CRH processing where additional CPU cycle to form new Destinati= on by playing with bits and from new destination header. Regards Parag Juniper Business Use Only --_000_BYAPR05MB40249DA724789EB17C083B2FDFC00BYAPR05MB4024namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello,

 

I have gone though this draft and below are my thoug= ht with respect to CRH comparison given in the draft

 

  1. At ingress node has to more work by gathering individual micro sid . = for example  Node A configured with micro sid  FC00::A000/32 Node= B with FC00::B0000/32.

Now at ingress node has to concinnated these = 2 micro sid into one  FC00::A000:B000: followed by of carrier  wh= ich is 0000 .

 

So this is more complex stuff introduced at i= ngress while programing path.

 

  1. Even shifting of bit are hardware friendly ,  it is still more w= ork then normal CRH processing  where additional CPU cycle to form new= Destination by playing with bits and from new destination header.

 

Regards

Parag

 


Juniper Business= Use Only

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X19fX19fX19fX18NCg== --_000_C7C2E1C43D652C4E9E49FE7517C236CB0264E178dggeml509mbschi_ Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable
Hi Sasha,

Many thanks for you comments and sorry for my delay. Please see my rep= ly inline.

Cheng

=B7=A2=BC=FE=C8=CB: spring [spring-bounce= s@ietf.org] =B4=FA=B1=ED Alexander Vainshtein [Alexander.Vainshtein@ecitele= .com]
=B7=A2=CB=CD=CA=B1=BC=E4: 2019=C4=EA7=D4=C224=C8=D5 23:27
=CA=D5=BC=FE=C8=CB: draft-ietf-spring-mpls-path-segment.authors@ietf= .org
=B3=AD=CB=CD: spring@ietf.org
=D6=F7=CC=E2: [spring] Questions about the life span of Path Segment=

Dear colleagues,

I have a couple of questions about the life span of = the Path Segment.

 

Suppose that some entity has computed and instantiat= ed an SR LP that follows a specific path from the ingress node to the = egress node across a single IGP domain. This path is expressed as a sequen= ce of valid IGP Segments (e.g., Node and/or Adjacency segments) .

Suppose also that a Path Segment has been allocated = by the egress node for this path, and the ingress node is aware of this and= inserts the label acting as the SID for the Path segments immediately afte= r the last SID of the path.

 

Now my questions:

1.  &nbs= p;    What happens to the Path Segment whe= n one of the IGP segments defining the original path fails?

a.       To the best of my understanding the = path itself becomes invalid

[Cheng] Agree. But IMO, the path segment has the same life circle with= the associated LSP. so it MAY not be invalid in FRR since the egress, ingr= ess even the controller does not know that until the Reroute is triggered, then it should be treated as invalid.=


b.       Will the Path Segment that identifie= s the now invalid path be retained indefinitely, or would it be invalidated= as well and the label acting as its SID released?

[Cheng] Honestly, I think it depends on implementation. The the LSP fa= ils, then the related Path Segment is invalid. But when the Rerouted LSP is= installed, the path segment should be allocated, and we don't make any assumption of the value of the path se= gment. It CAN be the same value as the previous one. 


2.  &nbs= p;    Suppose that the entity that has com= puted and instantiated the original path re-computes it and instantiate a n= ew valid path.

a.       Should the new path (that replaces t= he invalidated original one) be allocated with the same Path Segment as the= original path, or should a new Path Segment be allocated for it?

[Cheng] Same as above. As long as the information is synchronized betw= een the controller and the data plane, any value is OK. But the same path s= egment should be recommended.

 

b.       If the Path Segment allocated for th= e invalidated path is released (see (1b) above), can the label that identif= ied it be re-used as the Path Segment ID immediately, or only after some de= lay?

[Cheng] It depends on the implementation. Just to make sure that the p= ath segment can be available.


 

From my POV the answers to these questions do not de= pend on the actual method by which the Path Segments are allocated and prop= agated from the egress node to the ingress one.

And while my questions explicitly mention IGP Segmen= ts that define the SR LSP for which the Path Segment is allocated, the desi= red behavior should not depend on the type of segments used in the definiti= on of the path.

[Cheng] Sure.


Your feedback would be highly appreciated.

 

Regards, and lots of thanks in advance,

[Cheng] Thank you as well for valuable comments.

Sasha

 

Office: +972-39266302

Cell:      +972-5492663= 02

Email:   Alexander.Vainshtein@ecitele.com<= /p>

 


___________________________________________________________________________=

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CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have recei= ved this
transmission in error, please inform us by e-mail, phone or fax, and then d= elete the original
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Hi Dirk,

I really agree with on the explanation of SRv6 SID. We also think the = design of 128-bits SRv6 SID is a good idea. 

Also, we can not avoid the fact that 128 bits are a little bit long wh= en the SID list is long , and the overhead can not be ignore.  We can = use the binding SID to release the pressure.  But also, if you take a = look from another angle, you will see that there are some redundant bits in the Segment that can be removed. Especial= ly when the common prefix is long. So why not we just get rid of the redund= ant in SID list to get a smaller overhead without any affect on the functio= nalities of SRv6. 

Also, one modification for now and the future, for all the SIDs. We on= ly need to make once modification and it fits to all SRv6 functionalities. = That is what we have done in draft https= ://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00. 
  

If possible, you can take a look of the section 7, which describes the= benefits of this solution:
* Seamless integration with= SRv6 Network Programming
* Supporting Full Set Functionalities of SRv6
* Control-Plane friendly
* Hardware-friendly
* Efficient MTU overhead(the most important part that all= solutions would like to solve.)
* Scalable SR TE
* Saving IPv6 address(Burning /16 or 32/bit address in SI= D space is expensive)

Thanks,
Cheng




=B7=A2=BC=FE=C8=CB: spring [spring-bounce= s@ietf.org] =B4=FA=B1=ED Dirk Steinberg [dirk@lapishills.com]
=B7=A2=CB=CD=CA=B1=BC=E4: 2019=C4=EA7=D4=C225=C8=D5 20:32
=CA=D5=BC=FE=C8=CB: Mark Smith
=B3=AD=CB=CD: SPRING WG
=D6=F7=CC=E2: Re: [spring] Approaches to MTU efficiency in SRv6 in t= odays SPRING session


Am 25.07.2019 um 02:49 schrieb Mark Smith <markzzzsmith@gmail.com>:

On Thu., 25 Jul. 2019, 02:20 Dirk Ste= inberg, <dirk@lapishills.com> wrote:
Hi All,

in todays SPRING session we have heard concerns about
MTU efficiency in certain use cases involving SRv6.

It is true that using 128 bit SRv6 SIDs trades scalability
and flexibility against MTU overhead. There will certainly
be use cases where the additional overhead may be
justified.

I can understand the convenience of SIDs being= the same size as the underlying layer identifier. However, do they have to= be?

128 bit SIDs is literally more SID values than= there will ever be IPv6 unicast addresses (multicast has 1/8th the space).= It's a larger space than the number of nodes than can be attached to the e= ntire IPv6 Internet.

What size would SIDs be if they were dimension= ed only for the SR functions they're being and going to be used for, rather= than just being sized to the lower layer identifier value?

If MPLS based SIDs are 20 bits, and they do no= t have any SR functional constraints, I think that suggests SIDs can be far= smaller than 128 bits, which then addresses the overhead problem 128 bit S= IDs creates.

It is important to understand that 128 bit SIDs in SRv6 
in most cases are semantically equivalent to 2 SIDs in
SR-MPLS. This is because the SID contains both a 
locator and a function part (and optionally also an argument).

For example, assuming a 64:64 bit split in SRv6 the 64 bit locator
identifies the router whereas the 64 bit function part identifies
the function (plus optional arguments) which could be a VPN
or an adjacency.

So one SID in SRv6 is equivalent to one transport label plus
one service label in MPLS. For a typical VPN use case that
would be a 2 label stack consisting of the LDP or SR transport
label leading to the egress PE and the VPN label.
The same use case in SRv6 uses only one single SID.

When doing an apples-to-apples comparison of SID sizes
to MPLS label sizes the proper comparison would be 
64 bit  (for example, could also be longer or shorter) in SRv6
to 20 bit in MPLS.

The 20 bit label size in MPLS is a serious limitation for 
large-scale networks and data centers.

Adding uSID into the picture allows the network architect to make
his own choice regarding the tradeoff between identifier length <= /div>
and MTU overhead. He may choose to use 64 bits or he can choose
to use 16 bit SRv6 uSIDs. Note that the 16 bit size for uSID is
only an example and in principle the designer could also choose <= /div>
to use a different length for uSID, i.e. 32 bit.

Also note that when using SRv6 uSID the semantics regarding
locator and function are again like in MPLS, meaning that one
uSID does NOT designate both locator and function but only one
of the two. For a VPN use case you would need 2 uSIDs just like
in MPLS.

Assuming the vendor implementation of 32 bit uSID in SRv6 in 
addition to 16 bits uSIDs the network designer would have a full =
choice of identifier length: 16 bit, 32 bit (uSID) and 64 bit 
(full SRv6 SID).

For other uses cases where MTU efficiency is a major concern
the answer within the SRv6 framework is SRv6 uSID.

Another proposal to address the MTU efficiency problem today
advertised itself as basically using the same semantics as MPLS
encapsulated in IPv6 and also noted that SRv6 deviates from
legacy MPLS regarding label semantics.

This is exactly the point.

Not being dependent on the legacy MPLS label binding semantics
in SRv6 is a big advantage.

And this advantage is carried forward in SRv6 uSID as well.
SRv6 uSID addresses the problem of MTU efficiency while
avoiding to fall back to MPLS label binding semantics.

No separate mapping table is required to be able to forward uSID.

It is also not true that uSID inflates the IGP and/or FIB tables
more than other approaches. A uSID is advertised just like
other SRv6 SIDs, although the prefix length will typically
be much shorter. The fact that no extra label mapping
table is required contributes to improved control and
data plane efficiency and provides excellent forwarding
ASIC efficiency, especially for low-FIB and legacy systems.

Cheers
Dirk

_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/ma= ilman/listinfo/spring

--_000_C7C2E1C43D652C4E9E49FE7517C236CB0264E1B2dggeml509mbschi_-- From nobody Fri Jul 26 11:07:02 2019 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 78A64120179 for ; Fri, 26 Jul 2019 11:07:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id O4chsT_9a_wx for ; Fri, 26 Jul 2019 11:06:58 -0700 (PDT) Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [IPv6:2a00:1450:4864:20::236]) (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 3933B120331 for ; Fri, 26 Jul 2019 11:06:58 -0700 (PDT) Received: by mail-lj1-x236.google.com with SMTP id v18so52275616ljh.6 for ; Fri, 26 Jul 2019 11:06:58 -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=8owCnSr8Eb3UDCLBydQUMfdSf8E33WJ32J5/5B3jSBU=; b=G546zscZj/JHFaK+yRO8lq/IUWZNQ0NhSu0rnFa0Ww8ycX7tNJECHSW6pDbA5pHTAF 4YhuPJbwJRpJcnRq71H8zkjqclPSkdPLXabZcL/DvBPWb55XJ3XjwGFejJB6iAyPyiSG sWDeftNDUEE+2zcdQACxcfkipNsaXoO4i+/lEjRAeC6P+6h8fJlsY0kQWpHgUE1cRs/m 4uAVKR3qBeuJ8baKFyMkD3WaWrVvRwDCyMHfzCROx0gZhCmkgo7k/cEvU0htw11wMuTI NOvwQUwCnZchmIl+cBhPBNkE9zTZfbYXP8MIX105say6Sar1kvs7LUCGzxbzaixn5Zb9 MihQ== 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=8owCnSr8Eb3UDCLBydQUMfdSf8E33WJ32J5/5B3jSBU=; b=l5FB6e6e90Yh9LXCr39mruZ/MjGx/i0KDARiE2miujkHfLaEZvE7RD81Vy1SJu0gmf Ai3f9bBuz5zZ1EomGV36REbiGNilIkk3miUaXypvLCU/hXqnh7vekIzPjg+NPXn7S6UY n5LenhRqhFtmyb2tPc6mKA6VsNMjrVtf8yvXJESRsJtjYa8s/nRZ3hTxOnByk4b9nWdf 4ThApUSihGL4R/MyQK8dbEDVSU/oURSeeLNMBmASbQrRdMBgm51vL1QtOL/W6SPTaED8 BTeTXydikrbTnps01ewmnSJxPUYLbiUJvCrVVCQ/vEi/Xzyzdrskc8X1y8GcfqcZHrEd g5lw== X-Gm-Message-State: APjAAAW+e17jLGigdUtSfPE8O8lu5OQ14vIE8FDmNq14IG74Xa8X+kvI bXHFuvQpaVKlwnrq/sCP3LGKBsQAnTdzFV1O9tEHBXkLU7o= X-Google-Smtp-Source: APXvYqzRFoznLmX7xq7Ciny6TLDygNkTnf4IfHn55WxNmPajPdgSgArQq+BpTKfhf1Ee+IuVgjEcpVj+XA3yDVSAAq8= X-Received: by 2002:a2e:9ac6:: with SMTP id p6mr34150493ljj.100.1564164416447; Fri, 26 Jul 2019 11:06:56 -0700 (PDT) MIME-Version: 1.0 References: <3DE71250-DC8C-4B3B-A1C9-56475A628043@lapishills.com> In-Reply-To: <3DE71250-DC8C-4B3B-A1C9-56475A628043@lapishills.com> From: Greg Mirsky Date: Fri, 26 Jul 2019 14:06:44 -0400 Message-ID: To: Dirk Steinberg Cc: SPRING WG List Content-Type: multipart/alternative; boundary="00000000000069a8cc058e996848" Archived-At: Subject: Re: [spring] Approaches to MTU efficiency in SRv6 in todays SPRING session X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Jul 2019 18:07:01 -0000 --00000000000069a8cc058e996848 Content-Type: text/plain; charset="UTF-8" Hi Dirk, et al., I'd like to point to draft-mirsky-6man-unified-id-sr that proposes the use of the SRH for identifiers of 20 and 32 bits-long. Regards, Greg On Wed, Jul 24, 2019 at 12:20 PM Dirk Steinberg wrote: > Hi All, > > in todays SPRING session we have heard concerns about > MTU efficiency in certain use cases involving SRv6. > > It is true that using 128 bit SRv6 SIDs trades scalability > and flexibility against MTU overhead. There will certainly > be use cases where the additional overhead may be > justified. > > For other uses cases where MTU efficiency is a major concern > the answer within the SRv6 framework is SRv6 uSID. > > Another proposal to address the MTU efficiency problem today > advertised itself as basically using the same semantics as MPLS > encapsulated in IPv6 and also noted that SRv6 deviates from > legacy MPLS regarding label semantics. > > This is exactly the point. > > Not being dependent on the legacy MPLS label binding semantics > in SRv6 is a big advantage. > > And this advantage is carried forward in SRv6 uSID as well. > SRv6 uSID addresses the problem of MTU efficiency while > avoiding to fall back to MPLS label binding semantics. > > No separate mapping table is required to be able to forward uSID. > > It is also not true that uSID inflates the IGP and/or FIB tables > more than other approaches. A uSID is advertised just like > other SRv6 SIDs, although the prefix length will typically > be much shorter. The fact that no extra label mapping > table is required contributes to improved control and > data plane efficiency and provides excellent forwarding > ASIC efficiency, especially for low-FIB and legacy systems. > > Cheers > Dirk > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > --00000000000069a8cc058e996848 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Dirk, et al.,
I'd like to point to draft-mirsky= -6man-unified-id-sr=C2=A0=C2=A0that proposes the use of the SRH for ide= ntifiers of 20 and 32 bits-long.

Regards,
Greg

On Wed, Jul 24, 2019 at 12:20 PM Dirk Steinberg <dirk@lapishills.com> wrote:
Hi All,

in todays SPRING session we have heard concerns about
MTU efficiency in certain use cases involving SRv6.

It is true that using 128 bit SRv6 SIDs trades scalability
and flexibility against MTU overhead. There will certainly
be use cases where the additional overhead may be
justified.

For other uses cases where MTU efficiency is a major concern
the answer within the SRv6 framework is SRv6 uSID.

Another proposal to address the MTU efficiency problem today
advertised itself as basically using the same semantics as MPLS
encapsulated in IPv6 and also noted that SRv6 deviates from
legacy MPLS regarding label semantics.

This is exactly the point.

Not being dependent on the legacy MPLS label binding semantics
in SRv6 is a big advantage.

And this advantage is carried forward in SRv6 uSID as well.
SRv6 uSID addresses the problem of MTU efficiency while
avoiding to fall back to MPLS label binding semantics.

No separate mapping table is required to be able to forward uSID.

It is also not true that uSID inflates the IGP and/or FIB tables
more than other approaches. A uSID is advertised just like
other SRv6 SIDs, although the prefix length will typically
be much shorter. The fact that no extra label mapping
table is required contributes to improved control and
data plane efficiency and provides excellent forwarding
ASIC efficiency, especially for low-FIB and legacy systems.

Cheers
Dirk

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--00000000000069a8cc058e996848-- From nobody Wed Jul 31 08:23:58 2019 Return-Path: X-Original-To: spring@ietf.org Delivered-To: spring@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id F2C441202D4; Wed, 31 Jul 2019 08:23:49 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: IETF Secretariat To: Cc: spring@ietf.org, ipr-announce@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.99.1 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <156458662997.27679.7917442441174678945@ietfa.amsl.com> Date: Wed, 31 Jul 2019 08:23:49 -0700 Archived-At: Subject: [spring] IPR Disclosure Telefonaktiebolaget LM Ericsson (publ)'s Statement about IPR related to draft-ietf-spring-segment-routing-mpls X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.29 List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Jul 2019 15:23:50 -0000 Dear Ahmed Bashandy, Clarence Filsfils, Stefano Previdi, Bruno Decraene, Stephane Litkowski, Rob Shakir: An IPR disclosure that pertains to your Internet-Draft entitled "Segment Routing with MPLS data plane" (draft-ietf-spring-segment-routing-mpls) was submitted to the IETF Secretariat on and has been posted on the "IETF Page of Intellectual Property Rights Disclosures" (https://datatracker.ietf.org/ipr/3664/). The title of the IPR disclosure is "Telefonaktiebolaget LM Ericsson (publ)'s Statement about IPR related to draft-ietf-spring-segment-routing-mpls" Thank you IETF Secretariat