From nobody Wed Oct 4 11:34:13 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C640713431C; Wed, 4 Oct 2017 11:34:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.698 X-Spam-Level: X-Spam-Status: No, score=-2.698 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_LOW=-0.7, 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 75qnsy77IoUV; Wed, 4 Oct 2017 11:34:03 -0700 (PDT) Received: from mail-lf0-x230.google.com (mail-lf0-x230.google.com [IPv6:2a00:1450:4010:c07::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 66FAF132D89; Wed, 4 Oct 2017 11:34:03 -0700 (PDT) Received: by mail-lf0-x230.google.com with SMTP id d10so12097489lfg.11; Wed, 04 Oct 2017 11:34:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=LgPEIBxx2gcKEXNexU8o5J5czDQFN3QzZyC+eKmZxHo=; b=NjHdGjaT233taLipE/KnrowGxWkjJVCCO6AW+XIr0B5gUnd7ct1oiB2Rki/pw5a+en 5T4Mnul3C+se+M2S+ZSXxTgPZy6td96jlEJTxu4P/kJb11Yxp+7Hzs3UYLGwDP3SGddk knTxX0iWNcs0izGNqToXVKvm8MD4UYD1IZpIrwUxix3J1p0RZw50B4jD46zhuSGQO1f9 ek+CchnDNZKekdO96LpnewypwdHZfcauhEIhjGzdrUw/gN5Xdfu+udtqFMZm578CI4IN HCnzHBiJYSrunq9j9tUAlx+2mgLUpUigbovVutH5DjOGnpV8o059q2yTeOMPqN52KFTi Ig9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=LgPEIBxx2gcKEXNexU8o5J5czDQFN3QzZyC+eKmZxHo=; b=jtiC94UhqT7OOjmklBUL42F8R6Zsm7TopLyONtZQs61iRTKcOTLYf0ksFQfNtEwWP3 gxsJe7QriRJM6KItcbczRpQEES60qKT7G9QIQpeGVzDKQmvHv07++iSw3KxNTd1rANxc 4LC/Eo878bmpAGhUZ3xRBPxkMteEEDPQPTDvJPyxEpK0XQ0J44U/K9Ewcsb7qDyKSqPg NZLXXkUnyS4Y9TReeOwy3/QyncveIRhTfZcSuyGmx3T6xjyZ4ZXF3waEqcDMVC4ZFCy9 t/eJXCl0C+AxwUUug6bazDt69QdW2jP6vdtG/bgzAkV05ybwfes5bojO9lI7FxZv753l WZ9g== X-Gm-Message-State: AMCzsaUWa1rZjLa3zzlYkUhuq2vJJv9fkwyWIlwCk9guNASAtTUZikYa v8FoYHT0hY8uS2e0Rdmw51Iqtt44UCLRpKOiseD8aw== X-Google-Smtp-Source: AOwi7QDH0azEA65RHGg3yy7UuIBjuaH2gwIVXLFA4Jg+ZQswTv2BAyawOL3/18h3+1lHpNXyEkQRmSQwS6lKIGH9OEY= X-Received: by 10.25.92.16 with SMTP id q16mr5393990lfb.57.1507142041216; Wed, 04 Oct 2017 11:34:01 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.3.10 with HTTP; Wed, 4 Oct 2017 11:34:00 -0700 (PDT) In-Reply-To: <150713877625.24252.7793334744657814555.idtracker@ietfa.amsl.com> References: <150713877625.24252.7793334744657814555.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Wed, 4 Oct 2017 11:34:00 -0700 Message-ID: Subject: Fwd: New Version Notification for draft-mirsky-bfd-p2mp-vrrp-use-case-01.txt To: "rtg-bfd@ietf.org" , "rtgwg@ietf.org" Content-Type: multipart/alternative; boundary="94eb2c0d8ea8fe2ba9055abcd9cf" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Oct 2017 18:34:06 -0000 --94eb2c0d8ea8fe2ba9055abcd9cf Content-Type: text/plain; charset="UTF-8" Dear All, updates to the draft include the new mechanism to use VRRP control message to bootstrap p2mp BFD session within given VRID domain. To the best of our knowledge and understanding the current mechanism defined in the draft is sufficiently different from IPR disclosure https://datatracker.ietf.org/ipr/2739/. Appreciate your comments, questions. Regards, Greg ---------- Forwarded message ---------- From: Date: Wed, Oct 4, 2017 at 10:39 AM Subject: New Version Notification for draft-mirsky-bfd-p2mp-vrrp-use-case-01.txt To: Gregory Mirsky , Jeff Tantsura < jefftant.ietf@gmail.com> A new version of I-D, draft-mirsky-bfd-p2mp-vrrp-use-case-01.txt has been successfully submitted by Greg Mirsky and posted to the IETF repository. Name: draft-mirsky-bfd-p2mp-vrrp-use-case Revision: 01 Title: Bidirectional Forwarding Detection (BFD) for Multi-point Networks and Virtual Router Redundancy Protocol (VRRP) Use Case Document date: 2017-10-03 Group: Individual Submission Pages: 6 URL: https://www.ietf.org/internet-drafts/draft-mirsky-bfd-p2mp- vrrp-use-case-01.txt Status: https://datatracker.ietf.org/doc/draft-mirsky-bfd-p2mp- vrrp-use-case/ Htmlized: https://tools.ietf.org/html/draft-mirsky-bfd-p2mp-vrrp- use-case-01 Htmlized: https://datatracker.ietf.org/doc/html/draft-mirsky-bfd- p2mp-vrrp-use-case-01 Diff: https://www.ietf.org/rfcdiff?url2=draft-mirsky-bfd-p2mp- vrrp-use-case-01 Abstract: This document discusses use of Bidirectional Forwarding Detection (BFD) for multi-point networks to provide Virtual Router Redundancy Protocol (VRRP) with sub-second Master convergence and defines the extension to bootstrap point-to-multipoint BFD session. Hello, your help with manual posting of this draft is greatly appreciated. Both authors changed their affiliation and cannot confirm submission through regular process. Please let me know if you have any further questions. Thank you in advance for your help. Regards, Greg 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 --94eb2c0d8ea8fe2ba9055abcd9cf Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
updates to the draft include the new mechani= sm to use VRRP control message to bootstrap p2mp BFD session within given V= RID domain. To the best of our knowledge and understanding the current mech= anism defined in the draft is sufficiently different from IPR disclosure=C2= =A0https://datatracker.i= etf.org/ipr/2739/.

Appreciate your comments, q= uestions.

Regards,
Greg

---------- Forwarded message ----------
From: <= b class=3D"gmail_sendername"> <internet-drafts@ietf.org>
Date: W= ed, Oct 4, 2017 at 10:39 AM
Subject: New Version Notification for draft-= mirsky-bfd-p2mp-vrrp-use-case-01.txt
To: Gregory Mirsky <gregimirsky@gmail.com>, Jeff Tantsura &= lt;jefftant.ietf@gmail.com&g= t;



A new version of I-D, draft-mirsky-bfd-p2mp-vrrp-use-case-01.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-bfd-p2mp-vrrp-use-case
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A001
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Bidirectional Forwarding Detection= (BFD) for Multi-point Networks and Virtual Router Redundancy Protocol (VRR= P) Use Case
Document date:=C2=A0 2017-10-03
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 6
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draft-mi= rsky-bfd-p2mp-vrrp-use-case-01.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-mirsky-bfd-p2mp-vrrp-use-case/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://tools.ietf.org/html/draft-mirsky-bfd-p2mp-vrrp-use-case= -01
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-mirsky-bfd-p2mp-vrrp-use-case-01
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-mirsky-b= fd-p2mp-vrrp-use-case-01

Abstract:
=C2=A0 =C2=A0This document discusses use of Bidirectional Forwarding Detect= ion
=C2=A0 =C2=A0(BFD) for multi-point networks to provide Virtual Router Redun= dancy
=C2=A0 =C2=A0Protocol (VRRP) with sub-second Master convergence and defines= the
=C2=A0 =C2=A0extension to bootstrap point-to-multipoint BFD session.


Hello,
your help with manual posting of this draft is greatly appreciated. Both au= thors changed their affiliation and cannot confirm submission through regul= ar process.
Please let me know if you have any further questions.

Thank you in advance for your help.

Regards,
Greg

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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ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Oct 2017 19:47:56 +0000 Received: from XCH-RCD-020.cisco.com (xch-rcd-020.cisco.com [173.37.102.30]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id v94Jlu0J013410 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Wed, 4 Oct 2017 19:47:56 GMT Received: from xch-aln-001.cisco.com (173.36.7.11) by XCH-RCD-020.cisco.com (173.37.102.30) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Wed, 4 Oct 2017 14:47:55 -0500 Received: from xch-aln-001.cisco.com ([173.36.7.11]) by XCH-ALN-001.cisco.com ([173.36.7.11]) with mapi id 15.00.1320.000; Wed, 4 Oct 2017 14:47:55 -0500 From: "Les Ginsberg (ginsberg)" To: Kireeti Kompella , Mach Chen , "Carlos Pignataro (cpignata)" , Greg Mirsky CC: Tom Nadeau , "mpls@ietf.org" , Alia Atlas , "Reshad Rahman (rrahman)" , "rtg-bfd@ietf. org" Subject: RE: [Technical Errata Reported] RFC5884 (5085) Thread-Topic: [Technical Errata Reported] RFC5884 (5085) Thread-Index: AQHTEsardUdhCyxqXUiFhH3vY6n7oKJ/v9eAgACYlQCABCd3gIAAZg6AgACARYD//+32kIBPYcuA//+2iOA= Date: Wed, 4 Oct 2017 19:47:55 +0000 Message-ID: <0cefc1ddee8e4e77b56392095cc8d2d7@XCH-ALN-001.cisco.com> References: <20170811053550.27303B81263@rfc-editor.org> <20170811173930.GJ24942@pfrc.org> <7501E817-C95E-410A-A91E-080B36B213BE@cisco.com> <4bb63466962c4957a594e73163329940@XCH-ALN-001.cisco.com> <3D83F334-5ABC-4CD3-AF14-5D4537671D19@juniper.net> In-Reply-To: <3D83F334-5ABC-4CD3-AF14-5D4537671D19@juniper.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.51.190] Content-Type: multipart/alternative; boundary="_000_0cefc1ddee8e4e77b56392095cc8d2d7XCHALN001ciscocom_" MIME-Version: 1.0 Archived-At: X-Mailman-Approved-At: Wed, 04 Oct 2017 12:49:36 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Oct 2017 19:48:03 -0000 --_000_0cefc1ddee8e4e77b56392095cc8d2d7XCHALN001ciscocom_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 S2lyZWV0aSDigJMNCg0KVGhlIHRleHQgSSBwcm9wb3NlZCBiZWxvdyAoMyBwYXJhZ3JhcGjigJlz IHdvcnRoKSBpcyBpbnRlbmRlZCB0byDigJxyZXBsYWNlIGN1cnJlbnQgcGFyYWdyYXBocyAyIGFu ZCAzIG9mIFNlY3Rpb24gNuKAnS4NCg0KSSBhbSBmaW5lIHdpdGggY2hhbmdpbmcNCg0KICAgICDi gJxUaGUgZWdyZXNzIExTUiBmb2xsb3dzIHRoZSBwcm9jZWR1cmVzIGRlZmluZWQgaW4gW1JGQyA4 MDI5XeKApuKAnQ0KDQpUbw0KDQogICAgIOKAnFRoZSBlZ3Jlc3MgTFNSIE1VU1QgZm9sbG93IHRo ZSBwcm9jZWR1cmVzIGRlZmluZWQgaW4gW1JGQyA4MDI5XeKApuKAnQ0KDQpNYWNoIGFuZCBHcmVn IHNob3VsZCBzcGVhayBmb3IgdGhlbXNlbHZlcyDigJMgYnV0IEkgaGFkIHRoZSBpbXByZXNzaW9u IHRoYXQgTWFjaCB3YXMgYWdyZWVhYmxlIOKAkyBidXQgR3JlZyBJIGFtIG5vdCBzbyBzdXJlIGFi b3V0Lg0KDQogICBMZXMNCg0KDQpGcm9tOiBLaXJlZXRpIEtvbXBlbGxhIFttYWlsdG86a2lyZWV0 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In-Reply-To: <0cefc1ddee8e4e77b56392095cc8d2d7@XCH-ALN-001.cisco.com> References: <20170811053550.27303B81263@rfc-editor.org> <20170811173930.GJ24942@pfrc.org> <7501E817-C95E-410A-A91E-080B36B213BE@cisco.com> <4bb63466962c4957a594e73163329940@XCH-ALN-001.cisco.com> <3D83F334-5ABC-4CD3-AF14-5D4537671D19@juniper.net> <0cefc1ddee8e4e77b56392095cc8d2d7@XCH-ALN-001.cisco.com> From: Greg Mirsky Date: Wed, 4 Oct 2017 16:26:23 -0700 Message-ID: Subject: Re: [Technical Errata Reported] RFC5884 (5085) To: "Les Ginsberg (ginsberg)" Cc: Kireeti Kompella , Mach Chen , "Carlos Pignataro (cpignata)" , Tom Nadeau , "mpls@ietf.org" , Alia Atlas , "Reshad Rahman (rrahman)" , "rtg-bfd@ietf. org" Content-Type: multipart/alternative; boundary="001a11401768a65142055ac0efd4" Archived-At: X-Mailman-Approved-At: Wed, 04 Oct 2017 16:53:07 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Oct 2017 23:26:32 -0000 --001a11401768a65142055ac0efd4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Kireeti, Les, et. al, I agree and support the proposed changes, including the most recent proposed by Kireeti. If errata report can be used to record the changes - absolutely great. I hope that the errata report that triggered this discussion will be processed and marked accordingly. Regards, Greg On Wed, Oct 4, 2017 at 12:47 PM, Les Ginsberg (ginsberg) wrote: > Kireeti =E2=80=93 > > > > The text I proposed below (3 paragraph=E2=80=99s worth) is intended to = =E2=80=9Creplace > current paragraphs 2 and 3 of Section 6=E2=80=9D. > > > > I am fine with changing > > > > =E2=80=9CThe egress LSR follows the procedures defined in [RFC 8029]= =E2=80=A6=E2=80=9D > > > > To > > > > =E2=80=9CThe egress LSR MUST follow the procedures defined in [RFC 8= 029]=E2=80=A6=E2=80=9D > > > > Mach and Greg should speak for themselves =E2=80=93 but I had the impress= ion that > Mach was agreeable =E2=80=93 but Greg I am not so sure about. > > > > Les > > > > > > *From:* Kireeti Kompella [mailto:kireeti@juniper.net] > *Sent:* Wednesday, October 04, 2017 12:06 PM > *To:* Les Ginsberg (ginsberg) ; Mach Chen < > mach.chen@huawei.com>; Carlos Pignataro (cpignata) ; > Greg Mirsky > *Cc:* Tom Nadeau ; mpls@ietf.org; Alia Atlas < > akatlas@gmail.com>; Reshad Rahman (rrahman) ; > rtg-bfd@ietf. org ; Kireeti Kompella < > kireeti@juniper.net> > *Subject:* Re: [Technical Errata Reported] RFC5884 (5085) > > > > Hi Les, > > > > Just to be sure, you=E2=80=99re suggesting > > a) Change the sentence =E2=80=9CThe egress LSR MAY respond =E2=80= =A6 BFD session.=E2=80=9D > to =E2=80=9CThe egress LSR follows the procedures =E2=80=A6 reply message= .=E2=80=9D (or better > yet, =E2=80=9CThe egress LSR MUST follow the procedures =E2=80=A6.=E2=80= =9D) > > b) Move this sentence to after the BFD stuff. > > c) Remove the redundant comma (sigh! Thought I knew commas.) > > > > I am fine with all three suggestions. I think that the main point (the > source of interop issues) is (a); the other changes definitely improve > readability, but are not showstoppers (imo). > > > > I gather from Greg=E2=80=99s latest email (2017/09/08) and Mach=E2=80=99s= email below that > they=E2=80=99re both fine with these changes. Greg, Mach: speak up if no= t. > > > > As for =E2=80=9Cnew interop issues=E2=80=9D, the current situation is pre= tty bad, so let=E2=80=99s > fix it. > > > > As to how to implement these changes, I don=E2=80=99t personally care. I= t seems > heavyweight to issue a bis for this, rather than just errata, but I=E2=80= =99m happy > to leave that to the WG chairs to decide. > > > > Kireeti. > > > > *From: *"Les Ginsberg (ginsberg)" > *Date: *Tuesday, August 15, 2017 at 05:16 > *To: *Mach Chen , "Carlos Pignataro (cpignata)" < > cpignata@cisco.com>, Greg Mirsky > *Cc: *Tom Nadeau , "mpls@ietf.org" , > Kireeti Kompella , Alia Atlas , > "Reshad Rahman (rrahman)" , "rtg-bfd@ietf. org" < > rtg-bfd@ietf.org> > *Subject: *RE: [Technical Errata Reported] RFC5884 (5085) > > > > I tend to agree with Mach =E2=80=93 and I think what Mach states is also > reinforcing the point that Carlos has made =E2=80=93 which is that echo r= eply > procedures are defined by RFC 8029 =E2=80=93 not by RFC 5884. > > > > However, the current text suffers from much more than the ambiguity > regarding Echo Reply. > > > > 1)Second paragraph of Section 6 goes back and forth between discussing BF= D > Control packets, then Echo Reply, then BFD Control Packets > > > > 2)Third paragraph of Section 6 has an inappropriate use of =E2=80=9C,=E2= =80=9D in the > sentence: > > > > =E2=80=9CThe BFD Control packets from the > > ingress to the egress LSR MUST set the local discriminator of the > > egress *LSR, in *the Your Discriminator field.=E2=80=9D > > > > 3)Section 6.1 defines when the BFD Discriminator TLV MUST be sent and whe= n > it is optional in LSP ping. There is actually no need for Section 6 to sa= y > anything in this regard. > > > > I propose revised text below =E2=80=93 which is much more extensive in it= s changes > than what has been proposed thus far, but I think it is necessary to > eliminate all ambiguity. > > That said, there is no question that the current text is subject to > multiple interpretations =E2=80=93 so any change in text runs the risk of > introducing new interoperability issues. On balance it is probably > necessary to take this risk as there is no guarantee that implementations > are interoperable today, but the WG should still consider this point > carefully. > > > > The text below replaces current paragraphs 2 and 3 of Section 6. > > > > ** > > *On receipt of the LSP Ping Echo request message, the egress LSR MUST* > > * send a BFD Control packet to the ingress LSR, if the validation of* > > * the FEC in the LSP Ping Echo request message succeeds. This BFD* > > * Control packet MUST set the Your Discriminator field to the* > > * discriminator received from the ingress LSR in the LSP Ping Echo* > > * request message. The local discriminator assigned by the egress LS= R* > > * MUST be used as the My Discriminator field in the BFD session packets= * > > * sent by the egress LSR.* > > > > * The ingress LSR follows the procedures in [BFD] to send BFD Control* > > * packets to the egress LSR in response to the BFD Control packets* > > * received from the egress LSR. The BFD Control packets from the* > > * ingress to the egress LSR MUST set the local discriminator of the* > > * egress LSR in the Your Discriminator field. The egress LSR* > > * demultiplexes the BFD session based on the received Your* > > * Discriminator field. As mentioned above, the egress LSR MUST send* > > * Control packets to the ingress LSR with the Your Discriminator field* > > * set to the local discriminator of the ingress LSR. The ingress LSR* > > * uses this to demultiplex the BFD session.* > > > > * The egress LSR follows the procedures defined in [RFC 8029] to > determine when to respond with an LSP Ping Echo reply message.* > > ** > > > > Les > > > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *Mach Chen > *Sent:* Tuesday, August 15, 2017 12:56 AM > *To:* Carlos Pignataro (cpignata); Greg Mirsky > *Cc:* Tom Nadeau; mpls@ietf.org; Kireeti Kompella (kireeti@juniper.net); > Alia Atlas; Reshad Rahman (rrahman); rtg-bfd@ietf. org > *Subject:* RE: [Technical Errata Reported] RFC5884 (5085) > > > > Hi all, > > > > IMHO, the point is not about whether the Echo Reply is optional for a > normal LSP Ping, where the echo reply is totally controlled by the reply > mode. > > > > For RFC5884, since the reply mode is not specified, based on the current > text, it can be interpreted as the following two ways: > > 1) it implies a new =E2=80=9Cmode=E2=80=9D introduced, it=E2=80=99s = actually a =E2=80=9Cspecial=E2=80=9D LSP > Ping, the process is just as what is currently described in the RFC: an > Echo Reply is OPTINAL, whether and when to send Echo Reply is up to the > egress LSR, and the Ingress LSR should not assume an Echo reply will be > returned; > > 2) the echo reply is still controlled by the reply mode, and given > that there is a =E2=80=9CDo not reply=E2=80=9D mode, the current text see= ms right, but not > that clear. > > > > I incline to think way (2) is more nature, if so, the proposed =E2=80=9C= Corrected > Text=E2=80=9D may not work if the Sender set the reply mode to =E2=80=9CD= o not reply=E2=80=9D. > > > > I=E2=80=99d suggest: > > > > Original Text > ------------- > The egress LSR MAY respond with an LSP Ping Echo > reply message that carries the local discriminator assigned by it for > the BFD session. > > > > NEW: > > The egress LSR MAY respond with an LSP Ping Echo > reply message that carries the local discriminator assigned by it for > the BFD session. Whether to send an LSP Ping Echo reply message is > > determined by the reply mode carried the received Echo request message. > > > > Best regards, > > Mach > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *Carlos Pignataro (cpignata) > *Sent:* Tuesday, August 15, 2017 8:17 AM > *To:* Greg Mirsky > *Cc:* Tom Nadeau ; mpls@ietf.org; Kireeti > Kompella (kireeti@juniper.net) ; Alia Atlas < > akatlas@gmail.com>; Reshad Rahman (rrahman) ; > rtg-bfd@ietf. org > *Subject:* Re: [Technical Errata Reported] RFC5884 (5085) > > > > Greg, > > > > This is my final email on this topic, since the arguments are now just > silly and not technically constructive. > > > > 1. It's not about understanding English. It's about understanding specs! > The "(if any)" that you quote means there are situations in which there's > no echo reply. As I already explained to you, that's for example the case > with Reply-mode: No-reply. However, the "(if any)" does not mean an Echo > Reply is OPTIONAL. !! Or that you choose when a reply is not sent!! > > 2. RFC 8029 obsoleted 4379. But to my recollection, nothing changed > relevant to this Errata. > > > > BFD for MPLS could have updated LSP ping behavior -- it just didn't. > > > Sent from my iPad > > > On Aug 14, 2017, at 2:12 PM, Greg Mirsky wrote: > > Hi Carlos, > > thank you for sharing your view on how LSP Echo request with BFD > Discriminator used to bootstrap a BFD session over MPLS LSP. I'm surprise= d > that you refer to RFC 8029 as normative reference when commenting on RFC > 5884. But even if we look into RFC 8029, it still has the same texts I've > quoted in the previous note that suggest that echo reply is optional. > Consider one of them "The Sender's Handle is filled in by the sender and > returned unchanged by the receiver in the echo reply (if any)." Though > English is my third language, I interpret "if any" in that sentence as > clear indication that the echo reply may not be sent ever. > > > > Regards, > > Greg > > > > On Fri, Aug 11, 2017 at 7:45 PM, Carlos Pignataro (cpignata) < > cpignata@cisco.com> wrote: > > Jeff, WG, > > > > I believe there is one additional consideration =E2=80=94 please see inli= ne. > > > > On Aug 11, 2017, at 1:39 PM, Jeffrey Haas wrote: > > > > [Note that I have adjusted the addresses in the headers to try to catch t= he > RFC authors' current accounts.] > > > The 5884 interop issue keeps bubbling up. Balaji submitted an errata, > which > provides us with a good place to start technical discussion. > > Please note I also spent some time off-list discussing this errata with > Balaji. > > > On Thu, Aug 10, 2017 at 10:35:50PM -0700, RFC Errata System wrote: > > Section: 6 > > Original Text > ------------- > The egress LSR MAY respond with an LSP Ping Echo > reply message that carries the local discriminator assigned by it for > the BFD session. > > Corrected Text > -------------- > The egress LSR MUST respond with an LSP Ping Echo reply message that > MAY carry the local discriminator assigned by it for the BFD session. > > > Notes > ----- > It is not clear from the original text which of the following is optional= : > - The egress MUST send a reply, but the discriminator in the reply is > optional > - The reply itself is optional > > Technically, the reply cannot be optional, because the egress needs to > report LSP-Ping verification status to the ingress. > > > > This is correct =E2=80=94 but even more so, technically, it is not up to = RFC 5884 > to define when an LSP-Ping reply is optional or not. > > > > That=E2=80=99s=E2=80=99 up to https://tools.ietf.org/html/rfc8029#section= -4.4 > > > > Lacking a Reply Mode set to "Do not reply" (https://tools.ietf.org/html/ > rfc8029#page-12) the RFC 8029 procedures dictate a response be sent, > independent of whether the RFC 5884 procedures use that information or no= t. > > > > More below. > > > > > The proposed text recommends to include BFD discriminator in the reply. > This was the intent of the original text. > > > My opinion follows: > > In section 6 - > > : On receipt of the LSP Ping Echo request message, the egress LSR MUST > : send a BFD Control packet to the ingress LSR, if the validation of > : the FEC in the LSP Ping Echo request message succeeds. This BFD > : Control packet MUST set the Your Discriminator field to the > : discriminator received from the ingress LSR in the LSP Ping Echo > : request message. The egress LSR MAY respond with an LSP Ping Echo > : reply message that carries the local discriminator assigned by it fo= r > : the BFD session. The local discriminator assigned by the egress LSR > : MUST be used as the My Discriminator field in the BFD session packet= s > : sent by the egress LSR. > > In the text above, I consider it quite clear that the receipt of the BFD > packet contains sufficient state to bring up the BFD session. The receip= t > of the same Discriminator in the LSP Ping Echo Reply is optional. > > This makes sense partially because the reply may be dropped and we want t= he > BFD session to come up as fast as possible. > > > > Yes, especially because the first sentence says that the egress sending a > BFD Control packet implies FEC validation passed. However, > https://tools.ietf.org/html/rfc8029#section-4.4 does more than FEC > validation. > > > > > The point of contention appears to be what to do if we *never* get such > replies. It's worth pointing out additional text in RFC 5884, section 3.= 2. > > : Hence, BFD is used in conjunction with LSP Ping for MPLS LSP fault > : detection: > : > : i) LSP Ping is used for bootstrapping the BFD session as describe= d > : later in this document. > : > : ii) BFD is used to exchange fault detection (i.e., BFD session) > : packets at the required detection interval. > : > : iii) LSP Ping is used to periodically verify the control plane > : against the data plane by ensuring that the LSP is mapped to > : the same FEC, at the egress, as the ingress. > > iii above reminds us that the LSP may be torn down because LSP Ping fails= . > Thus, it seems problematic that we do not get a reply ever. > > However, with the BFD session in the Up state, we have information provin= g > that the LSP is up. Thus we have contradictory intent. > > --- > > My opinion is that the MAY in the RFC 5884 procedures is intended to have > the BFD session come up by the most expedient means. I do not believe th= e > likely intent was to say "don't send Echo Reply". Among other things, th= at > seems contrary to the intent of the general LSP Ping procedures. > > Having given my personal observations, we now get to the business of the > Working Group: Debating intent and related text. > > > > My individual opinion is that, as written, RFC 5884 cannot mean any other > thing that =E2=80=9C The egress LSR MUST respond with an LSP Ping Echo re= ply > message that > > MAY carry the local discriminator assigned by it for the BFD session=E2= =80=9D. > > > > In other words, I support this errata. > > > > This is because RFC 5884 did not update RFC 4379=E2=80=99s procedures. An= d thus a > response is needed based on 8029 irregardless of whether 5884 uses it. > > > > That said, it is debatable whether that LSP Ping response is useful or > not. If it is not sent, it does not comply to 8029. But if the WG wants f= or > it to be not send, a new spec is needed. > > > > Thanks, > > > > -- Jeff > > > > =E2=80=94 > > Carlos Pignataro, carlos@cisco.com > > *=E2=80=9CSometimes I use big words that I do not fully understand, to ma= ke myself > sound more photosynthesis."* > > > > > > --001a11401768a65142055ac0efd4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Kireeti, Les, et. al,
I agree and support the propo= sed changes, including the most recent proposed by Kireeti.
If er= rata report can be used to record the changes - absolutely great.
I hope that the errata report that triggered this discussion will be proce= ssed and marked accordingly.

Regards,
Gr= eg

On = Wed, Oct 4, 2017 at 12:47 PM, Les Ginsberg (ginsberg) <= ;ginsberg@cisco.com= > wrote:

Kireeti =E2=80=93

=C2=A0

The text I proposed below (3 paragrap= h=E2=80=99s worth) is intended to =E2=80=9Creplace current paragraphs 2 and= 3 of Section 6=E2=80=9D.

=C2=A0

I am fine with changing

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0 =E2=80=9CThe= egress LSR follows the procedures defined in [RFC 8029]=E2=80=A6=E2=80=9D<= u>

=C2=A0

To

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0 =E2=80=9CThe= egress LSR MUST follow the procedures defined in [RFC 8029]=E2=80=A6=E2=80= =9D

=C2=A0

Mach and Greg should speak for themse= lves =E2=80=93 but I had the impression that Mach was agreeable =E2=80=93 b= ut Greg I am not so sure about.

=C2=A0

=C2=A0=C2=A0 Les=

=C2=A0

=C2=A0

From: Kireeti Kompella [mailto:kireeti@juniper.net= ]
Sent: Wednesday, October 04, 2017 12:06 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com>; Mach Chen <mach.chen@huawei.com>; = Carlos Pignataro (cpignata) <cpignata@cisco.com>; Greg Mirsky <gregimirsky@gmail.com>
Cc: Tom Nadeau <tnadeau@lucidvision.com>; mpls@ietf.org; Alia Atlas <akatlas@gmail.com>; Reshad Rahman= (rrahman) <rrahm= an@cisco.com>; rtg-bfd@ietf. org <rtg-bfd@ietf.org>; Kireeti Kompella <kireeti@juniper.net= >
Subject: Re: [Technical Errata Reported] RFC5884 (5085)

=C2=A0

Hi Les,

=C2=A0

Just to be sure, you=E2=80=99re suggesting

a)=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Change the sentence =E2=80=9CThe egress LSR MA= Y respond =E2=80=A6 BFD session.=E2=80=9D to =E2=80=9CThe egress LSR follow= s the procedures =E2=80=A6 reply message.=E2=80=9D=C2=A0 (or better yet, = =E2=80=9CThe egress LSR MUST follow the procedures =E2=80=A6.=E2=80=9D)

b)=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 Move this sentence to after the BFD stuff.<= /u>

c)=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Remove the redundant comma (sigh!=C2=A0 Though= t I knew commas.)

=C2=A0

I am fine with all three suggestions.=C2=A0 I think= that the main point (the source of interop issues) is (a); the other chang= es definitely improve readability, but are not showstoppers (imo).

=C2=A0

I gather from Greg=E2=80=99s latest email (2017/09/= 08) and Mach=E2=80=99s email below that they=E2=80=99re both fine with thes= e changes.=C2=A0 Greg, Mach: speak up if not.

=C2=A0

As for =E2=80=9Cnew interop issues=E2=80=9D, the cu= rrent situation is pretty bad, so let=E2=80=99s fix it.

=C2=A0

As to how to implement these changes, I don=E2=80= =99t personally care.=C2=A0 It seems heavyweight to issue a bis for this, r= ather than just errata, but I=E2=80=99m happy to leave that to the WG chairs to decide.

=C2=A0

Kireeti.

=C2=A0

From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Date: Tuesday, August 15, 2017 at 05:16
To: Mach Chen <mach.chen@huawei.com>, "Carlos Pignataro (cpignata)&quo= t; <cpignata@cis= co.com>, Greg Mirsky <gregimirsky@gmail.com>
Cc: Tom Nadeau <tnadeau@lucidvision.com>, "mpls@ietf.org" <mpls@ietf.org>, Kireeti Kompella <= kireeti@juniper.ne= t>, Alia Atlas <akat= las@gmail.com>, "Reshad Rahman (rrahman)" <rrahman@cisco.com>, "= ;rtg-bfd@ietf. org= " <rtg-bf= d@ietf.org>
Subject: RE: [Technical Errata Reported] RFC5884 (5085)

=C2=A0

I tend to agree with Mach =E2=80=93 a= nd I think what Mach states is also reinforcing the point that Carlos has m= ade =E2=80=93 which is that echo reply procedures are defined by RFC 8029 =E2=80=93 not by RFC 5884.

=C2=A0

However, the current text suffers fro= m much more than the ambiguity regarding Echo Reply.

=C2=A0

1)Second paragraph of Section 6 goes = back and forth between discussing BFD Control packets, then Echo Reply, the= n BFD Control Packets

=C2=A0

2)Third paragraph of Section 6 has an= inappropriate use of =E2=80=9C,=E2=80=9D in the sentence:

=C2=A0

=E2=80=9CThe BFD Control packets from= the

=C2=A0=C2=A0 ingress to the egress LS= R MUST set the local discriminator of the

=C2=A0=C2=A0 egress LSR, in the Your Discriminator field.=E2=80=9D<= /u>

=C2=A0

3)Section 6.1 defines when the BFD Di= scriminator TLV MUST be sent and when it is optional in LSP ping. There is = actually no need for Section 6 to say anything in this regard.

=C2=A0

I propose revised text below =E2=80= =93 which is much more extensive in its changes than what has been proposed= thus far, but I think it is necessary to eliminate all ambiguity.

That said, there is no question that = the current text is subject to multiple interpretations =E2=80=93 so any ch= ange in text runs the risk of introducing new interoperability issues. On balance it is probably necessary to take this risk as there is = no guarantee that implementations are interoperable today, but the WG shoul= d still consider this point carefully.

=C2=A0

The text below replaces current parag= raphs 2 and 3 of Section 6.

=C2=A0

<new= text start>

On rece= ipt of the LSP Ping Echo request message, the egress LSR MUST=

=C2=A0= =C2=A0 send a BFD Control packet to the ingress LSR, if the validation of

=C2=A0= =C2=A0 the FEC in the LSP Ping Echo request message succeeds.=C2=A0 This BF= D

=C2=A0= =C2=A0 Control packet MUST set the Your Discriminator field to the

=C2=A0= =C2=A0 discriminator received from the ingress LSR in the LSP Ping Echo

=C2=A0= =C2=A0 request message.=C2=A0 =C2=A0=C2=A0The local discriminator assigned = by the egress LSR

=C2=A0= =C2=A0 MUST be used as the My Discriminator field in the BFD session packet= s

=C2=A0= =C2=A0 sent by the egress LSR.

=C2=A0<= /span>

=C2=A0= =C2=A0 The ingress LSR follows the procedures in [BFD] to send BFD Control<= /span>

=C2=A0= =C2=A0 packets to the egress LSR in response to the BFD Control packets

=C2=A0= =C2=A0 received from the egress LSR.=C2=A0 The BFD Control packets from the=

=C2=A0= =C2=A0 ingress to the egress LSR MUST set the local discriminator of the

=C2=A0= =C2=A0 egress LSR in the Your Discriminator field.=C2=A0 The egress LSR

=C2=A0= =C2=A0 demultiplexes the BFD session based on the received Your<= u>

=C2=A0= =C2=A0 Discriminator field.=C2=A0 As mentioned above, the egress LSR MUST s= end

=C2=A0= =C2=A0 Control packets to the ingress LSR with the Your Discriminator field=

=C2=A0= =C2=A0 set to the local discriminator of the ingress LSR.=C2=A0 The ingress= LSR

=C2=A0= =C2=A0 uses this to demultiplex the BFD session.

=C2=A0<= /span>

=C2=A0 = The egress LSR follows the procedures defined in [RFC 8029] to determine wh= en to respond with an LSP Ping Echo=C2=A0 reply message.<= u>

<new= text end>

=C2=A0

=C2=A0=C2=A0=C2=A0 Les<= u>

=C2=A0

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org= ] On Behalf Of Mach Chen
Sent: Tuesday, August 15, 2017 12:56 AM
To: Carlos Pignataro (cpignata); Greg Mirsky
Cc: Tom Nadeau; m= pls@ietf.org; Kireeti Kompella (kireeti@juniper.net); Alia Atlas; Reshad Rahman (rrah= man); rtg-bfd@ietf. org
Subject: RE: [Technical Errata Reported] RFC5884 (5085)

=C2=A0

Hi all,

=C2=A0

IMHO, the point is not about whether = the Echo Reply is optional for a normal LSP Ping, where the echo reply is t= otally controlled by the reply mode.

=C2=A0

For RFC5884, since the reply mode is = not specified, based on the current text, it can be interpreted as the foll= owing two ways:

1)= =C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 it implies a new =E2=80=9Cmode=E2=80=9D introduced, i= t=E2=80=99s actually a =E2=80=9Cspecial=E2=80=9D LSP Ping, =C2=A0the proces= s is just as what is currently described in the RFC: an Echo Reply is OPTIN= AL, whether and when to send Echo Reply is up to the egress LSR, and the Ingress LSR shoul= d not assume an Echo reply will be returned;

2)= =C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 the echo reply is still controlled by the reply mode,= and given that there is a =E2=80=9CDo not reply=E2=80=9D mode, the current= text seems right, but not that clear.

=C2=A0

I incline to think way (2) is more na= ture, if so, =C2=A0the proposed =E2=80=9CCorrected Text=E2=80=9D may not wo= rk if the Sender set the reply mode to =E2=80=9CDo not reply=E2=80=9D.

=C2=A0

I=E2=80=99d suggest:=

=C2=A0

Original Text
-------------
The egress LSR MAY respond with an LSP Ping Echo
reply message that carries the local discriminator assigned by it for
the BFD session.

=C2=A0

NEW:

The egress LSR MAY respond with an LSP Ping Echo
reply message that carries the local discriminator assigned by it for
the BFD session. Whether to send an LSP Ping Echo reply message is <= u>

determined by the reply mode carried the received Ec= ho request message. =C2=A0

=C2=A0

Best regards,

Mach

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.o= rg] On Behalf Of Carlos Pignataro (cpignata)
Sent: Tuesday, August 15, 2017 8:17 AM
To: Greg Mirsky <gregimirsky@gmail.com>
Cc: Tom Nadeau <tnadeau@lucidvision.com>; mpls@ietf.org; Kiree= ti Kompella (kiree= ti@juniper.net) <kireeti@juniper.net>; Alia Atlas <akatlas@gmail.com>; Reshad Rahman (rrahman) <rrahman@cisco.com>; rtg-bfd@ietf. org <rtg-bfd@ietf.org>
Subject: Re: [Technical Errata Reported] RFC5884 (5085)

=C2=A0

Greg,

=C2=A0

This is my final email on this topic, since the argu= ments are now just silly and not technically constructive.=C2=A0<= /u>

=C2=A0

1. It's not about understanding English. It'= s about understanding specs! The "(if any)" that you quote means = there are situations in which there's no echo reply. As I already expla= ined to you, that's for example the case with Reply-mode: No-reply. However, the "(if any)" does not mean an Echo Reply is= OPTIONAL. !! Or that you choose when a reply is not sent!!

2. RFC 8029 obsoleted 4379. But to my recollection, = nothing changed relevant to this Errata.=C2=A0

=C2=A0

BFD for MPLS could have updated LSP ping behavior --= it just didn't.=C2=A0


Sent from my iPad


On Aug 14, 2017, at 2:12 PM, Greg Mirsky <gregimirsky@gmail.com> wrote:=

Hi Carlos,

thank you for sharing your view on how LSP Echo requ= est with BFD Discriminator used to bootstrap a BFD session over MPLS LSP. I= 'm surprised that you refer to RFC 8029 as normative reference when com= menting on RFC 5884. But even if we look into RFC 8029, it still has the same texts I've quoted in the previous= note that suggest that echo reply is optional. Consider one of them "= The Sender's Handle is fil= led in by the sender and returned unchanged=C2=A0by the receiver in the echo reply (if any)." Though English is my third = language, I interpret "if any" in that sentence as clear indicati= on that the echo reply may not be sent ever.

=C2=A0

Regards= ,

Greg

=C2=A0

On Fri, Aug 11, 2017 at 7:45 PM, Carlos Pignataro (c= pignata) <cpigna= ta@cisco.com> wrote:

Jeff, WG,

=C2=A0

I believe there is one additional consideration =E2= =80=94 please see inline.

=C2=A0

On Aug 11, 2017, at 1:39 PM, Jeffrey Haas <jhaas@pfrc.org> wrote:=

=C2=A0

[Note that I have adj= usted the addresses in the headers to try to catch the
RFC authors' current accounts.]


The 5884 interop issue keeps bubbling up.=C2=A0 Balaji submitted an errata,= which
provides us with a good place to start technical discussion.

Please note I also spent some time off-list discussing this errata with
Balaji.


On Thu, Aug 10, 2017 at 10:35:50PM -0700, RFC Errata System wrote:

Section: 6

Original Text
-------------
The egress LSR MAY respond with an LSP Ping Echo
reply message that carries the local discriminator assigned by it for
the BFD session.

Corrected Text
--------------
The egress LSR MUST respond with an LSP Ping Echo reply message that
MAY carry the local discriminator assigned by it for the BFD session.


Notes
-----
It is not clear from the original text which of the following is optional:<= br> =C2=A0- =C2=A0The egress MUST send a reply, but the discriminator in the re= ply is optional
=C2=A0- =C2=A0The reply itself is optional

Technically, the reply cannot be optional, because the egress needs to repo= rt LSP-Ping verification status to the ingress.

=C2=A0

This is correct =E2=80=94 but even more so, technica= lly, it is not up to RFC 5884 to define when an LSP-Ping reply is optional = or not.

=C2=A0

That=E2=80=99s=E2=80=99 up to=C2=A0https://tools.= ietf.org/html/rfc8029#section-4.4

=C2=A0

Lacking a Reply Mode set to "Do not reply"= (https://tools.ietf.org/html/rfc8029#page-12) the RFC 8029 procedu= res dictate a response be sent, independent of whether the RFC 5884 procedures use that information or not.

=C2=A0

More below.

=C2=A0


The proposed text recommends to include BFD discriminator in the reply. Thi= s was the intent of the original text.


My opinion follows:

In section 6 -

: =C2=A0=C2=A0=C2=A0On receipt of the LSP Ping Echo request message, the eg= ress LSR MUST
: =C2=A0=C2=A0=C2=A0send a BFD Control packet to the ingress LSR, if the va= lidation of
: =C2=A0=C2=A0=C2=A0the FEC in the LSP Ping Echo request message succeeds.= =C2=A0 This BFD
: =C2=A0=C2=A0=C2=A0Control packet MUST set the Your Discriminator field to= the
: =C2=A0=C2=A0=C2=A0discriminator received from the ingress LSR in the LSP = Ping Echo
: =C2=A0=C2=A0=C2=A0request message.=C2=A0 The egress LSR MAY respond with = an LSP Ping Echo
: =C2=A0=C2=A0=C2=A0reply message that carries the local discriminator assi= gned by it for
: =C2=A0=C2=A0=C2=A0the BFD session.=C2=A0 The local discriminator assigned= by the egress LSR
: =C2=A0=C2=A0=C2=A0MUST be used as the My Discriminator field in the BFD s= ession packets
: =C2=A0=C2=A0=C2=A0sent by the egress LSR.

In the text above, I consider it quite clear that the receipt of the BFD packet contains sufficient state to bring up the BFD session.=C2=A0 The rec= eipt
of the same Discriminator in the LSP Ping Echo Reply is optional.

This makes sense partially because the reply may be dropped and we want the=
BFD session to come up as fast as possible.

=C2=A0

Yes, especially because the first sentence says that= the egress sending a BFD Control packet implies FEC validation passed. How= ever,=C2=A0https://tools.ietf.org/html/rfc8029#section-4.4=C2= =A0does more than FEC validation.

=C2=A0


The point of contention appears to be what to do if we *never* get such
replies.=C2=A0 It's worth pointing out additional text in RFC 5884, sec= tion 3.2.

: =C2=A0=C2=A0=C2=A0Hence, BFD is used in conjunction with LSP Ping for MPL= S LSP fault
: =C2=A0=C2=A0=C2=A0detection:
:
: =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0i) LSP Ping is used for bootstrapping= the BFD session as described
: =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0later in this docum= ent.
:
: =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0ii) BFD is used to exchange fault detection= (i.e., BFD session)
: =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0packets at the requ= ired detection interval.
:
: =C2=A0=C2=A0=C2=A0=C2=A0iii) LSP Ping is used to periodically verify the = control plane
: =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0against the data pl= ane by ensuring that the LSP is mapped to
: =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the same FEC, at th= e egress, as the ingress.

iii above reminds us that the LSP may be torn down because LSP Ping fails.<= br> Thus, it seems problematic that we do not get a reply ever.

However, with the BFD session in the Up state, we have information proving<= br> that the LSP is up.=C2=A0 Thus we have contradictory intent.

---

My opinion is that the MAY in the RFC 5884 procedures is intended to have the BFD session come up by the most expedient means.=C2=A0 I do not believe= the
likely intent was to say "don't send Echo Reply".=C2=A0 Among= other things, that
seems contrary to the intent of the general LSP Ping procedures.

Having given my personal observations, we now get to the business of the Working Group: Debating intent and related text. =C2=A0

=C2=A0

My individual opinion is that, as written, RFC 5884 = cannot mean any other thing that =E2=80=9C The egress LSR MUST respond with= an LSP Ping Echo reply message that

MAY carry the local discriminator assigned by it for= the BFD session=E2=80=9D.

=C2=A0

In other words, I support this errata.=

=C2=A0

This is because RFC 5884 did not update RFC 4379=E2= =80=99s procedures. And thus a response is needed based on 8029 irregardles= s of whether 5884 uses it.

=C2=A0

That said, it is debatable whether that LSP Ping res= ponse is useful or not. If it is not sent, it does not comply to 8029. But = if the WG wants for it to be not send, a new spec is needed.<= /p>

=C2=A0

Thanks,

=C2=A0<= /p>

-- Jeff=

=C2=A0

=E2=80=94<= u>

Carlos Pignataro,=C2=A0<= a href=3D"mailto:carlos@cisco.com" target=3D"_blank">carlos@cisco.com
=E2=80=9CSometimes I use big words that I do not fully understand, to ma= ke myself sound more=C2=A0photosynthesis."

=C2=A0

=C2=A0


--001a11401768a65142055ac0efd4-- From nobody Wed Oct 4 16:53:14 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 60A4F1344CD; Wed, 4 Oct 2017 16:52:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.519 X-Spam-Level: X-Spam-Status: No, score=-14.519 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, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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 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 HAbzscaQhQKV; Wed, 4 Oct 2017 16:52:24 -0700 (PDT) Received: from alln-iport-8.cisco.com (alln-iport-8.cisco.com [173.37.142.95]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B02F132D4B; Wed, 4 Oct 2017 16:52:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=64395; q=dns/txt; s=iport; t=1507161144; x=1508370744; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=Nvyp0FuuIulT9IwqHmM1a0eRzXSR+TDDNZNNq5Tqv+g=; b=YelV+q0cW0gTCBG4VQQvsExZ3hBavTYfkEgHNvgTPGMZVP36bYGgeQaQ piHRDaHBgxZsyTkXG1BS6++pt08Aa5SYLmGVzmn2+/74WvM15LbWOySV4 Dp6WNIVeDXGUCFLM3TgwO9S4+50vmuXIxeyFx7hEDNAdS3L46Iht3mFqP 8=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0DuAQDactVZ/5pdJa1cGQEBAQEBAQEBA?= =?us-ascii?q?QEBBwEBAQEBgm8BbWQ4ATUnB597iEONd4IECiODOoFeAoRbVwECAQEBAQECayi?= =?us-ascii?q?FGAEBAQEDDAIMAUoCEhACAQgRAwEBASEBBgchERQJCAIEAQ0FiUxMAxUQqQcnh?= =?us-ascii?q?yMNg18BAQEBAQEBAQEBAQEBAQEBAQEBAQEYBYMtggKBUYFqghuBDYE9gSGBcwE?= =?us-ascii?q?SAT8WhT4FihKORogePAKHXIgOhHmCFIVviwaKE4JdiDcCERkBgTgBV4EDC3gVS?= =?us-ascii?q?YRhOQwQgWd2AYZ9DRgHgQWBEAEBAQ?= X-IronPort-AV: E=Sophos; i="5.42,479,1500940800"; d="scan'208,217"; a="12225627" Received: from rcdn-core-3.cisco.com ([173.37.93.154]) by alln-iport-8.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Oct 2017 23:52:23 +0000 Received: from XCH-RCD-005.cisco.com (xch-rcd-005.cisco.com [173.37.102.15]) by rcdn-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id v94NqNmF003678 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Wed, 4 Oct 2017 23:52:23 GMT Received: from xch-rcd-005.cisco.com (173.37.102.15) by XCH-RCD-005.cisco.com (173.37.102.15) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Wed, 4 Oct 2017 18:52:22 -0500 Received: from xch-rcd-005.cisco.com ([173.37.102.15]) by XCH-RCD-005.cisco.com ([173.37.102.15]) with mapi id 15.00.1320.000; Wed, 4 Oct 2017 18:52:22 -0500 From: "Reshad Rahman (rrahman)" To: Greg Mirsky , "Les Ginsberg (ginsberg)" CC: Kireeti Kompella , Mach Chen , "Carlos Pignataro (cpignata)" , Tom Nadeau , "mpls@ietf.org" , Alia Atlas , "rtg-bfd@ietf. org" , Jeffrey Haas Subject: Re: [Technical Errata Reported] RFC5884 (5085) Thread-Topic: [Technical Errata Reported] RFC5884 (5085) Thread-Index: AQHTEmO8R3tdtI6ozEe8kGufEEktmaJ/wJ2AgACYlQCABCd3gIAAZg6AgACARYCAAEi/gIBPBwKAgAALpYCAAD0JgP//xNUA Date: Wed, 4 Oct 2017 23:52:22 +0000 Message-ID: References: <20170811053550.27303B81263@rfc-editor.org> <20170811173930.GJ24942@pfrc.org> <7501E817-C95E-410A-A91E-080B36B213BE@cisco.com> <4bb63466962c4957a594e73163329940@XCH-ALN-001.cisco.com> <3D83F334-5ABC-4CD3-AF14-5D4537671D19@juniper.net> <0cefc1ddee8e4e77b56392095cc8d2d7@XCH-ALN-001.cisco.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.7.1.161129 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.86.254.71] Content-Type: multipart/alternative; boundary="_000_D5FAEC68318D55rrahmanciscocom_" MIME-Version: 1.0 Archived-At: X-Mailman-Approved-At: Wed, 04 Oct 2017 16:53:06 -0700 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Oct 2017 23:52:29 -0000 --_000_D5FAEC68318D55rrahmanciscocom_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Regarding Kireeti=92s point below, I also think errata would be best. Jeff? "As to how to implement these changes, I don=92t personally care. It seems= heavyweight to issue a bis for this, rather than just errata, but I=92m ha= ppy to leave that to the WG chairs to decide." From: Greg Mirsky > Date: Wednesday, October 4, 2017 at 7:26 PM To: "Les Ginsberg (ginsberg)" > Cc: Kireeti Kompella >, Mac= h Chen >, "Carlos Pignata= ro (cpignata)" >, Tom Nadeau = >, "mpls@ietf.org" >, Alia Atlas >, Reshad >, "rtg-bfd@ietf.org" > Subject: Re: [Technical Errata Reported] RFC5884 (5085) Hi Kireeti, Les, et. al, I agree and support the proposed changes, including the most recent propose= d by Kireeti. If errata report can be used to record the changes - absolutely great. I hope that the errata report that triggered this discussion will be proces= sed and marked accordingly. Regards, Greg On Wed, Oct 4, 2017 at 12:47 PM, Les Ginsberg (ginsberg) > wrote: Kireeti =96 The text I proposed below (3 paragraph=92s worth) is intended to =93replace= current paragraphs 2 and 3 of Section 6=94. I am fine with changing =93The egress LSR follows the procedures defined in [RFC 8029]=85=94 To =93The egress LSR MUST follow the procedures defined in [RFC 8029]=85= =94 Mach and Greg should speak for themselves =96 but I had the impression that= Mach was agreeable =96 but Greg I am not so sure about. Les From: Kireeti Kompella [mailto:kireeti@juniper.net] Sent: Wednesday, October 04, 2017 12:06 PM To: Les Ginsberg (ginsberg) >= ; Mach Chen >; Carlos Pig= nataro (cpignata) >; Greg Mir= sky > Cc: Tom Nadeau >; m= pls@ietf.org; Alia Atlas >; Reshad Rahman (rrahman) >; rtg-bfd@ietf. org = >; Kireeti Kompella > Subject: Re: [Technical Errata Reported] RFC5884 (5085) Hi Les, Just to be sure, you=92re suggesting a) Change the sentence =93The egress LSR MAY respond =85 BFD session.= =94 to =93The egress LSR follows the procedures =85 reply message.=94 (or = better yet, =93The egress LSR MUST follow the procedures =85.=94) b) Move this sentence to after the BFD stuff. c) Remove the redundant comma (sigh! Thought I knew commas.) I am fine with all three suggestions. I think that the main point (the sou= rce of interop issues) is (a); the other changes definitely improve readabi= lity, but are not showstoppers (imo). I gather from Greg=92s latest email (2017/09/08) and Mach=92s email below t= hat they=92re both fine with these changes. Greg, Mach: speak up if not. As for =93new interop issues=94, the current situation is pretty bad, so le= t=92s fix it. As to how to implement these changes, I don=92t personally care. It seems = heavyweight to issue a bis for this, rather than just errata, but I=92m hap= py to leave that to the WG chairs to decide. Kireeti. From: "Les Ginsberg (ginsberg)" > Date: Tuesday, August 15, 2017 at 05:16 To: Mach Chen >, "Carlos = Pignataro (cpignata)" >, Greg= Mirsky > Cc: Tom Nadeau >, "= mpls@ietf.org" >,= Kireeti Kompella >, Alia A= tlas >, "Reshad Rahman (rrahman= )" >, "rtg-bfd@ietf. org" > Subject: RE: [Technical Errata Reported] RFC5884 (5085) I tend to agree with Mach =96 and I think what Mach states is also reinforc= ing the point that Carlos has made =96 which is that echo reply procedures = are defined by RFC 8029 =96 not by RFC 5884. However, the current text suffers from much more than the ambiguity regardi= ng Echo Reply. 1)Second paragraph of Section 6 goes back and forth between discussing BFD = Control packets, then Echo Reply, then BFD Control Packets 2)Third paragraph of Section 6 has an inappropriate use of =93,=94 in the s= entence: =93The BFD Control packets from the ingress to the egress LSR MUST set the local discriminator of the egress LSR, in the Your Discriminator field.=94 3)Section 6.1 defines when the BFD Discriminator TLV MUST be sent and when = it is optional in LSP ping. There is actually no need for Section 6 to say = anything in this regard. I propose revised text below =96 which is much more extensive in its change= s than what has been proposed thus far, but I think it is necessary to elim= inate all ambiguity. That said, there is no question that the current text is subject to multipl= e interpretations =96 so any change in text runs the risk of introducing ne= w interoperability issues. On balance it is probably necessary to take this= risk as there is no guarantee that implementations are interoperable today= , but the WG should still consider this point carefully. The text below replaces current paragraphs 2 and 3 of Section 6. On receipt of the LSP Ping Echo request message, the egress LSR MUST send a BFD Control packet to the ingress LSR, if the validation of the FEC in the LSP Ping Echo request message succeeds. This BFD Control packet MUST set the Your Discriminator field to the discriminator received from the ingress LSR in the LSP Ping Echo request message. The local discriminator assigned by the egress LSR MUST be used as the My Discriminator field in the BFD session packets sent by the egress LSR. The ingress LSR follows the procedures in [BFD] to send BFD Control packets to the egress LSR in response to the BFD Control packets received from the egress LSR. The BFD Control packets from the ingress to the egress LSR MUST set the local discriminator of the egress LSR in the Your Discriminator field. The egress LSR demultiplexes the BFD session based on the received Your Discriminator field. As mentioned above, the egress LSR MUST send Control packets to the ingress LSR with the Your Discriminator field set to the local discriminator of the ingress LSR. The ingress LSR uses this to demultiplex the BFD session. The egress LSR follows the procedures defined in [RFC 8029] to determine = when to respond with an LSP Ping Echo reply message. Les From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Mach Chen Sent: Tuesday, August 15, 2017 12:56 AM To: Carlos Pignataro (cpignata); Greg Mirsky Cc: Tom Nadeau; mpls@ietf.org; Kireeti Kompella (kire= eti@juniper.net); Alia Atlas; Reshad Rahman (rr= ahman); rtg-bfd@ietf. org Subject: RE: [Technical Errata Reported] RFC5884 (5085) Hi all, IMHO, the point is not about whether the Echo Reply is optional for a norma= l LSP Ping, where the echo reply is totally controlled by the reply mode. For RFC5884, since the reply mode is not specified, based on the current te= xt, it can be interpreted as the following two ways: 1) it implies a new =93mode=94 introduced, it=92s actually a =93specia= l=94 LSP Ping, the process is just as what is currently described in the R= FC: an Echo Reply is OPTINAL, whether and when to send Echo Reply is up to = the egress LSR, and the Ingress LSR should not assume an Echo reply will be= returned; 2) the echo reply is still controlled by the reply mode, and given tha= t there is a =93Do not reply=94 mode, the current text seems right, but not= that clear. I incline to think way (2) is more nature, if so, the proposed =93Correcte= d Text=94 may not work if the Sender set the reply mode to =93Do not reply= =94. I=92d suggest: Original Text ------------- The egress LSR MAY respond with an LSP Ping Echo reply message that carries the local discriminator assigned by it for the BFD session. NEW: The egress LSR MAY respond with an LSP Ping Echo reply message that carries the local discriminator assigned by it for the BFD session. Whether to send an LSP Ping Echo reply message is determined by the reply mode carried the received Echo request message. Best regards, Mach From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Carlos Pignata= ro (cpignata) Sent: Tuesday, August 15, 2017 8:17 AM To: Greg Mirsky > Cc: Tom Nadeau >; m= pls@ietf.org; Kireeti Kompella (kireeti@juniper.net) >; Alia Atlas >; Reshad Rahman= (rrahman) >; rtg-bfd@ietf. org= > Subject: Re: [Technical Errata Reported] RFC5884 (5085) Greg, This is my final email on this topic, since the arguments are now just sill= y and not technically constructive. 1. It's not about understanding English. It's about understanding specs! Th= e "(if any)" that you quote means there are situations in which there's no = echo reply. As I already explained to you, that's for example the case with= Reply-mode: No-reply. However, the "(if any)" does not mean an Echo Reply = is OPTIONAL. !! Or that you choose when a reply is not sent!! 2. RFC 8029 obsoleted 4379. But to my recollection, nothing changed relevan= t to this Errata. BFD for MPLS could have updated LSP ping behavior -- it just didn't. Sent from my iPad On Aug 14, 2017, at 2:12 PM, Greg Mirsky > wrote: Hi Carlos, thank you for sharing your view on how LSP Echo request with BFD Discrimina= tor used to bootstrap a BFD session over MPLS LSP. I'm surprised that you r= efer to RFC 8029 as normative reference when commenting on RFC 5884. But ev= en if we look into RFC 8029, it still has the same texts I've quoted in the= previous note that suggest that echo reply is optional. Consider one of th= em "The Sender's Handle is filled in by the sender and returned unchanged b= y the receiver in the echo reply (if any)." Though English is my third lang= uage, I interpret "if any" in that sentence as clear indication that the ec= ho reply may not be sent ever. Regards, Greg On Fri, Aug 11, 2017 at 7:45 PM, Carlos Pignataro (cpignata) > wrote: Jeff, WG, I believe there is one additional consideration =97 please see inline. On Aug 11, 2017, at 1:39 PM, Jeffrey Haas > wrote: [Note that I have adjusted the addresses in the headers to try to catch the RFC authors' current accounts.] The 5884 interop issue keeps bubbling up. Balaji submitted an errata, whic= h provides us with a good place to start technical discussion. Please note I also spent some time off-list discussing this errata with Balaji. On Thu, Aug 10, 2017 at 10:35:50PM -0700, RFC Errata System wrote: Section: 6 Original Text ------------- The egress LSR MAY respond with an LSP Ping Echo reply message that carries the local discriminator assigned by it for the BFD session. Corrected Text -------------- The egress LSR MUST respond with an LSP Ping Echo reply message that MAY carry the local discriminator assigned by it for the BFD session. Notes ----- It is not clear from the original text which of the following is optional: - The egress MUST send a reply, but the discriminator in the reply is opt= ional - The reply itself is optional Technically, the reply cannot be optional, because the egress needs to repo= rt LSP-Ping verification status to the ingress. This is correct =97 but even more so, technically, it is not up to RFC 5884= to define when an LSP-Ping reply is optional or not. That=92s=92 up to https://tools.ietf.org/html/rfc8029#section-4.4 Lacking a Reply Mode set to "Do not reply" (https://tools.ietf.org/html/rfc= 8029#page-12) the RFC 8029 procedures dictate a response be sent, independe= nt of whether the RFC 5884 procedures use that information or not. More below. The proposed text recommends to include BFD discriminator in the reply. Thi= s was the intent of the original text. My opinion follows: In section 6 - : On receipt of the LSP Ping Echo request message, the egress LSR MUST : send a BFD Control packet to the ingress LSR, if the validation of : the FEC in the LSP Ping Echo request message succeeds. This BFD : Control packet MUST set the Your Discriminator field to the : discriminator received from the ingress LSR in the LSP Ping Echo : request message. The egress LSR MAY respond with an LSP Ping Echo : reply message that carries the local discriminator assigned by it for : the BFD session. The local discriminator assigned by the egress LSR : MUST be used as the My Discriminator field in the BFD session packets : sent by the egress LSR. In the text above, I consider it quite clear that the receipt of the BFD packet contains sufficient state to bring up the BFD session. The receipt of the same Discriminator in the LSP Ping Echo Reply is optional. This makes sense partially because the reply may be dropped and we want the BFD session to come up as fast as possible. Yes, especially because the first sentence says that the egress sending a B= FD Control packet implies FEC validation passed. However, https://tools.iet= f.org/html/rfc8029#section-4.4 does more than FEC validation. The point of contention appears to be what to do if we *never* get such replies. It's worth pointing out additional text in RFC 5884, section 3.2. : Hence, BFD is used in conjunction with LSP Ping for MPLS LSP fault : detection: : : i) LSP Ping is used for bootstrapping the BFD session as described : later in this document. : : ii) BFD is used to exchange fault detection (i.e., BFD session) : packets at the required detection interval. : : iii) LSP Ping is used to periodically verify the control plane : against the data plane by ensuring that the LSP is mapped to : the same FEC, at the egress, as the ingress. iii above reminds us that the LSP may be torn down because LSP Ping fails. Thus, it seems problematic that we do not get a reply ever. However, with the BFD session in the Up state, we have information proving that the LSP is up. Thus we have contradictory intent. --- My opinion is that the MAY in the RFC 5884 procedures is intended to have the BFD session come up by the most expedient means. I do not believe the likely intent was to say "don't send Echo Reply". Among other things, that seems contrary to the intent of the general LSP Ping procedures. Having given my personal observations, we now get to the business of the Working Group: Debating intent and related text. My individual opinion is that, as written, RFC 5884 cannot mean any other t= hing that =93 The egress LSR MUST respond with an LSP Ping Echo reply messa= ge that MAY carry the local discriminator assigned by it for the BFD session=94. In other words, I support this errata. This is because RFC 5884 did not update RFC 4379=92s procedures. And thus a= response is needed based on 8029 irregardless of whether 5884 uses it. That said, it is debatable whether that LSP Ping response is useful or not.= If it is not sent, it does not comply to 8029. But if the WG wants for it = to be not send, a new spec is needed. Thanks, -- Jeff =97 Carlos Pignataro, carlos@cisco.com =93Sometimes I use big words that I do not fully understand, to make myself= sound more photosynthesis." --_000_D5FAEC68318D55rrahmanciscocom_ Content-Type: text/html; charset="Windows-1252" Content-ID: <8FC645543706A14AA89E834AF61ECE88@emea.cisco.com> Content-Transfer-Encoding: quoted-printable

Regardi= ng Kireeti=92s point below, I also think errata would be best. Jeff?

"As= to how to implement these changes, I don=92t personally care.  It see= ms heavyweight to issue a bis for this, rather than just errata, but I=92m = happy to leave that to the WG chairs to decide."<= /p>



From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wednesday, October 4, 2017 at= 7:26 PM
To: "Les Ginsberg (ginsberg)&q= uot; <ginsberg@cisco.com> Cc: Kireeti Kompella <kireeti@juniper.net>, Mach Chen <mach.chen@huawei.com>, "Ca= rlos Pignataro (cpignata)" <c= pignata@cisco.com>, Tom Nadeau <tnadeau@lucidvis= ion.com>, "mpls@ietf.org&q= uot; <mpls@ietf.org>, Alia Atlas= <akatlas@gmail.com>, Reshad <rrahman@cisco.com>,= "rtg-bfd@ietf.org" <<= a href=3D"mailto:rtg-bfd@ietf.org">rtg-bfd@ietf.org>
Subject: Re: [Technical Errata Repo= rted] RFC5884 (5085)

Hi Kireeti, Les, et. al,
I agree and support the proposed changes, including the most recent pr= oposed by Kireeti.
If errata report can be used to record the changes - absolutely great.=
I hope that the errata report that triggered this discussion will be p= rocessed and marked accordingly.

Regards,
Greg

On Wed, Oct 4, 2017 at 12:47 PM, Les Ginsberg (g= insberg) <ginsberg@cisco.com> wrote:

Kireeti =96

 

The text I proposed below (3 paragrap= h=92s worth) is intended to =93replace current paragraphs 2 and 3 of Sectio= n 6=94.

 

I am fine with changing

 

     =93The egres= s LSR follows the procedures defined in [RFC 8029]=85=94

 

To

 

     =93The egres= s LSR MUST follow the procedures defined in [RFC 8029]=85=94<= /u>

 

Mach and Greg should speak for themse= lves =96 but I had the impression that Mach was agreeable =96 but Greg I am= not so sure about.

 

   Les=

 

 

From: Kireeti Kompella [mailto:kireeti@juniper.net= ]
Sent: Wednesday, October 04, 2017 12:06 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com>; Mach Chen <mach.chen@huawei.com>; = Carlos Pignataro (cpignata) <cpignata@cisco.com>; Greg Mirsky <gregimirsky@gmail.com>
Cc: Tom Nadeau <tnadeau@lucidvision.com>; mpls@ietf.org; Alia = Atlas <akatlas@gm= ail.com>; Reshad Rahman (rrahman) <rrahman@cisco.com>; rtg-bfd@ietf. org <rtg-bfd@ietf= .org>; Kireeti Kompella <kireeti@juniper.net>
Subject: Re: [Technical Errata Reported] RFC5884 (5085)

 

Hi Les,

 

Just to be sure, you=92re suggesting<= /span>

a) =       Change the sentence =93The egress LSR MAY resp= ond =85 BFD session.=94 to =93The egress LSR follows the procedures =85 rep= ly message.=94  (or better yet, =93The egress LSR MUST follow the procedures =85.=94)

b) =      Move this sentence to after the BFD stuff.<= /u>

c) =       Remove the redundant comma (sigh!  Though= t I knew commas.)

 

I am fine with all three suggestions.  I think= that the main point (the source of interop issues) is (a); the other chang= es definitely improve readability, but are not showstoppers (imo).

 

I gather from Greg=92s latest email (2017/09/08) an= d Mach=92s email below that they=92re both fine with these changes.  G= reg, Mach: speak up if not.

 

As for =93new interop issues=94, the current situat= ion is pretty bad, so let=92s fix it.

 

As to how to implement these changes, I don=92t per= sonally care.  It seems heavyweight to issue a bis for this, rather th= an just errata, but I=92m happy to leave that to the WG chairs to decide.

 

Kireeti.

 

From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Date: Tuesday, August 15, 2017 at 05:16
To: Mach Chen <mach.chen@huawei.com>, "Carlos Pignataro (cpignata)&quo= t; <cpignata@cis= co.com>, Greg Mirsky <gregimirsky@gmail.com>
Cc: Tom Nadeau <tnadeau@lucidvision.com>, "mpls@ietf.org" <mpls@ietf.org>, Kireeti Kompella <kireeti@junip= er.net>, Alia Atlas <akatlas@gmail.com>, "Reshad Rahman (rrahman)" = <rrahman@cisco.co= m>, "rtg-bfd@iet= f. org" <= rtg-bfd@ietf.org>
Subject: RE: [Technical Errata Reported] RFC5884 (5085)

 

I tend to agree with Mach =96 and I t= hink what Mach states is also reinforcing the point that Carlos has made = =96 which is that echo reply procedures are defined by RFC 8029 =96 not by RFC 5884.

 

However, the current text suffers fro= m much more than the ambiguity regarding Echo Reply.

 

1)Second paragraph of Section 6 goes = back and forth between discussing BFD Control packets, then Echo Reply, the= n BFD Control Packets

 

2)Third paragraph of Section 6 has an= inappropriate use of =93,=94 in the sentence:

 

=93The BFD Control packets from the

   ingress to the egress LS= R MUST set the local discriminator of the

   egress LSR, in the Your Discriminator field.=94=

 

3)Section 6.1 defines when the BFD Di= scriminator TLV MUST be sent and when it is optional in LSP ping. There is = actually no need for Section 6 to say anything in this regard.

 

I propose revised text below =96 whic= h is much more extensive in its changes than what has been proposed thus fa= r, but I think it is necessary to eliminate all ambiguity.

That said, there is no question that = the current text is subject to multiple interpretations =96 so any change i= n text runs the risk of introducing new interoperability issues. On balance it is probably necessary to take this risk as there is = no guarantee that implementations are interoperable today, but the WG shoul= d still consider this point carefully.

 

The text below replaces current parag= raphs 2 and 3 of Section 6.

 

<new= text start>

On rece= ipt of the LSP Ping Echo request message, the egress LSR MUST=

 &= nbsp; send a BFD Control packet to the ingress LSR, if the validation of

 &= nbsp; the FEC in the LSP Ping Echo request message succeeds.  This BFD=

 &= nbsp; Control packet MUST set the Your Discriminator field to the

 &= nbsp; discriminator received from the ingress LSR in the LSP Ping Echo

 &= nbsp; request message.    The local discriminator assigned b= y the egress LSR

 &= nbsp; MUST be used as the My Discriminator field in the BFD session packets=

 &= nbsp; sent by the egress LSR.

 <= /span>

 &= nbsp; The ingress LSR follows the procedures in [BFD] to send BFD Control

 &= nbsp; packets to the egress LSR in response to the BFD Control packets

 &= nbsp; received from the egress LSR.  The BFD Control packets from the<= /span>

 &= nbsp; ingress to the egress LSR MUST set the local discriminator of the

 &= nbsp; egress LSR in the Your Discriminator field.  The egress LSR

 &= nbsp; demultiplexes the BFD session based on the received Your

 &= nbsp; Discriminator field.  As mentioned above, the egress LSR MUST se= nd

 &= nbsp; Control packets to the ingress LSR with the Your Discriminator field<= /span>

 &= nbsp; set to the local discriminator of the ingress LSR.  The ingress = LSR

 &= nbsp; uses this to demultiplex the BFD session.

 <= /span>

  = The egress LSR follows the procedures defined in [RFC 8029] to determine wh= en to respond with an LSP Ping Echo  reply message.<= u>

<new= text end>

 

    Les<= u>

 

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org= ] On Behalf Of Mach Chen
Sent: Tuesday, August 15, 2017 12:56 AM
To: Carlos Pignataro (cpignata); Greg Mirsky
Cc: Tom Nadeau; m= pls@ietf.org; Kireeti Kompella (kireeti@juniper.net); Alia Atlas; Reshad Rahman (rrah= man); rtg-bfd@ietf. org
Subject: RE: [Technical Errata Reported] RFC5884 (5085)

 

Hi all,

 

IMHO, the point is not about whether = the Echo Reply is optional for a normal LSP Ping, where the echo reply is t= otally controlled by the reply mode.

 

For RFC5884, since the reply mode is = not specified, based on the current text, it can be interpreted as the foll= owing two ways:

1)=      = ; it implies a new =93mode=94 introduced, it=92s actual= ly a =93special=94 LSP Ping,  the process is just as what is currently= described in the RFC: an Echo Reply is OPTINAL, whether and when to send Echo Reply is up to the egress LSR, and the Ingress LSR shoul= d not assume an Echo reply will be returned;

2)=      = ; the echo reply is still controlled by the reply mode,= and given that there is a =93Do not reply=94 mode, the current text seems = right, but not that clear.

 

I incline to think way (2) is more na= ture, if so,  the proposed =93Corrected Text=94 may not work if the Se= nder set the reply mode to =93Do not reply=94.

 

I=92d suggest:

 

Original Text
-------------
The egress LSR MAY respond with an LSP Ping Echo
reply message that carries the local discriminator assigned by it for
the BFD session.

 

NEW:

The egress LSR MAY respond with an LSP Ping Echo
reply message that carries the local discriminator assigned by it for
the BFD session. Whether to send an LSP Ping Echo reply message is <= u>

determined by the reply mode carried the received Ec= ho request message.  

 

Best regards,

Mach

 

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.o= rg] On Behalf Of Carlos Pignataro (cpignata)
Sent: Tuesday, August 15, 2017 8:17 AM
To: Greg Mirsky <gregimirsky@gmail.com>
Cc: Tom Nadeau <tnadeau@lucidvision.com>; mpls@ietf.org; Kiree= ti Kompella (kiree= ti@juniper.net) <kireeti@juniper.net>; Alia Atlas <akatlas@gmail.com>; Reshad Rahman (rrahman) <rrahman@cisco.com>; rtg-bfd@ietf. org <rtg-bfd@ietf.org>
Subject: Re: [Technical Errata Reported] RFC5884 (5085)

 

Greg,

 

This is my final email on this topic, since the argu= ments are now just silly and not technically constructive. <= /u>

 

1. It's not about understanding English. It's about = understanding specs! The "(if any)" that you quote means there ar= e situations in which there's no echo reply. As I already explained to you,= that's for example the case with Reply-mode: No-reply. However, the "(if any)" does not mean an Echo Reply is= OPTIONAL. !! Or that you choose when a reply is not sent!!

2. RFC 8029 obsoleted 4379. But to my recollection, = nothing changed relevant to this Errata. 

 

BFD for MPLS could have updated LSP ping behavior --= it just didn't. 


Sent from my iPad


On Aug 14, 2017, at 2:12 PM, Greg Mirsky <gregimirsky@gmail.com> wrote:=

Hi Carlos,

thank you for sharing your view on how LSP Echo requ= est with BFD Discriminator used to bootstrap a BFD session over MPLS LSP. I= 'm surprised that you refer to RFC 8029 as normative reference when comment= ing on RFC 5884. But even if we look into RFC 8029, it still has the same texts I've quoted in the previous not= e that suggest that echo reply is optional. Consider one of them "The Sender's Handle is filled in b= y the sender and returned unchanged by the receiver in the echo reply (if any)." Though English is my third = language, I interpret "if any" in that sentence as clear indicati= on that the echo reply may not be sent ever.

 

Regards= ,

Greg

 

On Fri, Aug 11, 2017 at 7:45 PM, Carlos Pignataro (c= pignata) <cpigna= ta@cisco.com> wrote:

Jeff, WG,

 

I believe there is one additional consideration =97 = please see inline.

 

On Aug 11, 2017, at 1:39 PM, Jeffrey Haas <jhaas@pfrc.org> wrote:=

 

[Note that I have adj= usted the addresses in the headers to try to catch the
RFC authors' current accounts.]


The 5884 interop issue keeps bubbling up.  Balaji submitted an errata,= which
provides us with a good place to start technical discussion.

Please note I also spent some time off-list discussing this errata with
Balaji.


On Thu, Aug 10, 2017 at 10:35:50PM -0700, RFC Errata System wrote:

Section: 6

Original Text
-------------
The egress LSR MAY respond with an LSP Ping Echo
reply message that carries the local discriminator assigned by it for
the BFD session.

Corrected Text
--------------
The egress LSR MUST respond with an LSP Ping Echo reply message that
MAY carry the local discriminator assigned by it for the BFD session.


Notes
-----
It is not clear from the original text which of the following is optional:<= br>  -  The egress MUST send a reply, but the discriminator in the re= ply is optional
 -  The reply itself is optional

Technically, the reply cannot be optional, because the egress needs to repo= rt LSP-Ping verification status to the ingress.

 

This is correct =97 but even more so, technically, i= t is not up to RFC 5884 to define when an LSP-Ping reply is optional or not= .

 

 

Lacking a Reply Mode set to "Do not reply"= (https://tools.ietf.org/html/rfc8029#page-12) the RFC 8029 procedu= res dictate a response be sent, independent of whether the RFC 5884 procedures use that information or not.

 

More below.

 


The proposed text recommends to include BFD discriminator in the reply. Thi= s was the intent of the original text.


My opinion follows:

In section 6 -

:    On receipt of the LSP Ping Echo request message, the eg= ress LSR MUST
:    send a BFD Control packet to the ingress LSR, if the va= lidation of
:    the FEC in the LSP Ping Echo request message succeeds.&= nbsp; This BFD
:    Control packet MUST set the Your Discriminator field to= the
:    discriminator received from the ingress LSR in the LSP = Ping Echo
:    request message.  The egress LSR MAY respond with = an LSP Ping Echo
:    reply message that carries the local discriminator assi= gned by it for
:    the BFD session.  The local discriminator assigned= by the egress LSR
:    MUST be used as the My Discriminator field in the BFD s= ession packets
:    sent by the egress LSR.

In the text above, I consider it quite clear that the receipt of the BFD packet contains sufficient state to bring up the BFD session.  The rec= eipt
of the same Discriminator in the LSP Ping Echo Reply is optional.

This makes sense partially because the reply may be dropped and we want the=
BFD session to come up as fast as possible.

 

Yes, especially because the first sentence says that= the egress sending a BFD Control packet implies FEC validation passed. How= ever, https://tools.ietf.org/html/rfc8029#section-4.4 = ;does more than FEC validation.

 


The point of contention appears to be what to do if we *never* get such
replies.  It's worth pointing out additional text in RFC 5884, section= 3.2.

:    Hence, BFD is used in conjunction with LSP Ping for MPL= S LSP fault
:    detection:
:
:       i) LSP Ping is used for bootstrapping= the BFD session as described
:          later in this docum= ent.
:
:      ii) BFD is used to exchange fault detection= (i.e., BFD session)
:          packets at the requ= ired detection interval.
:
:     iii) LSP Ping is used to periodically verify the = control plane
:          against the data pl= ane by ensuring that the LSP is mapped to
:          the same FEC, at th= e egress, as the ingress.

iii above reminds us that the LSP may be torn down because LSP Ping fails.<= br> Thus, it seems problematic that we do not get a reply ever.

However, with the BFD session in the Up state, we have information proving<= br> that the LSP is up.  Thus we have contradictory intent.

---

My opinion is that the MAY in the RFC 5884 procedures is intended to have the BFD session come up by the most expedient means.  I do not believe= the
likely intent was to say "don't send Echo Reply".  Among oth= er things, that
seems contrary to the intent of the general LSP Ping procedures.

Having given my personal observations, we now get to the business of the Working Group: Debating intent and related text.  

 

My individual opinion is that, as written, RFC 5884 = cannot mean any other thing that =93 The egress LSR MUST respond with an LS= P Ping Echo reply message that

MAY carry the local discriminator assigned by it for= the BFD session=94.

 

In other words, I support this errata.=

 

This is because RFC 5884 did not update RFC 4379=92s= procedures. And thus a response is needed based on 8029 irregardless of wh= ether 5884 uses it.

 

That said, it is debatable whether that LSP Ping res= ponse is useful or not. If it is not sent, it does not comply to 8029. But = if the WG wants for it to be not send, a new spec is needed.<= /p>

 

Thanks,

 <= /p>

-- Jeff=

 

=97=

Carlos Pignataro, <= a href=3D"mailto:carlos@cisco.com" target=3D"_blank">carlos@cisco.com
=93Sometimes I use big words that I do not fully understand, to make mys= elf sound more photosynthesis."

 

 


 --_000_D5FAEC68318D55rrahmanciscocom_-- From nobody Fri Oct 6 00:37:00 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 285CC1344D6; Fri, 6 Oct 2017 00:36:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, 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 QBfLL1ZbDqQc; Fri, 6 Oct 2017 00:36:53 -0700 (PDT) Received: from pipi.pi.nu (pipi.pi.nu [83.168.239.141]) (using TLSv1.1 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 72DCB1344D8; Fri, 6 Oct 2017 00:36:52 -0700 (PDT) Received: from [192.168.0.2] (c213-89-111-155.bredband.comhem.se [213.89.111.155]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: loa@pi.nu) by pipi.pi.nu (Postfix) with ESMTPSA id 0FA58180155A; Fri, 6 Oct 2017 09:36:51 +0200 (CEST) Subject: Re: [Technical Errata Reported] RFC5884 (5085) To: "Reshad Rahman (rrahman)" , Greg Mirsky , "Les Ginsberg (ginsberg)" Cc: "Carlos Pignataro (cpignata)" , "mpls@ietf.org" , Kireeti Kompella , Alia Atlas , Tom Nadeau , "rtg-bfd@ietf. org" References: <20170811053550.27303B81263@rfc-editor.org> <20170811173930.GJ24942@pfrc.org> <7501E817-C95E-410A-A91E-080B36B213BE@cisco.com> <4bb63466962c4957a594e73163329940@XCH-ALN-001.cisco.com> <3D83F334-5ABC-4CD3-AF14-5D4537671D19@juniper.net> <0cefc1ddee8e4e77b56392095cc8d2d7@XCH-ALN-001.cisco.com> From: Loa Andersson Message-ID: Date: Fri, 6 Oct 2017 09:36:49 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Oct 2017 07:36:58 -0000 All, On 2017-10-05 01:52, Reshad Rahman (rrahman) wrote: > Regarding Kireeti’s point below, I also think errata would be best. Jeff? > > "As to how to implement these changes, I don’t personally care.  It > seems heavyweight to issue a bis for this, rather than just errata, but > I’m happy to leave that to the WG chairs to decide."____ > This is best handled as an errata. Also, it is a national holiday in China, Mach won't be able to respond until early next week. /Loa > > > From: Greg Mirsky > > Date: Wednesday, October 4, 2017 at 7:26 PM > To: "Les Ginsberg (ginsberg)" > > Cc: Kireeti Kompella >, > Mach Chen >, "Carlos > Pignataro (cpignata)" >, > Tom Nadeau >, > "mpls@ietf.org " >, Alia Atlas >, Reshad >, "rtg-bfd@ietf.org > " > > Subject: Re: [Technical Errata Reported] RFC5884 (5085) > > Hi Kireeti, Les, et. al, > I agree and support the proposed changes, including the most recent > proposed by Kireeti. > If errata report can be used to record the changes - absolutely great. > I hope that the errata report that triggered this discussion will be > processed and marked accordingly. > > Regards, > Greg > > On Wed, Oct 4, 2017 at 12:47 PM, Les Ginsberg (ginsberg) > > wrote: > > Kireeti –____ > > __ __ > > The text I proposed below (3 paragraph’s worth) is intended to > “replace current paragraphs 2 and 3 of Section 6”.____ > > __ __ > > I am fine with changing ____ > > __ __ > >      “The egress LSR follows the procedures defined in [RFC 8029]…”____ > > __ __ > > To ____ > > __ __ > >      “The egress LSR MUST follow the procedures defined in [RFC > 8029]…”____ > > __ __ > > Mach and Greg should speak for themselves – but I had the impression > that Mach was agreeable – but Greg I am not so sure about.____ > > __ __ > >    Les____ > > __ __ > > __ __ > > *From:*Kireeti Kompella [mailto:kireeti@juniper.net > ] > *Sent:* Wednesday, October 04, 2017 12:06 PM > *To:* Les Ginsberg (ginsberg) >; Mach Chen >; Carlos Pignataro (cpignata) > >; Greg Mirsky > > > *Cc:* Tom Nadeau >; mpls@ietf.org > ; Alia Atlas >; Reshad Rahman (rrahman) > >; rtg-bfd@ietf. org > >; Kireeti Kompella > > > *Subject:* Re: [Technical Errata Reported] RFC5884 (5085)____ > > __ __ > > Hi Les,____ > > __ __ > > Just to be sure, you’re suggesting____ > > __a)__Change the sentence “The egress LSR MAY respond … BFD > session.” to “The egress LSR follows the procedures … reply > message.”  (or better yet, “The egress LSR MUST follow the > procedures ….”)____ > > __b)__Move this sentence to after the BFD stuff.____ > > __c)__Remove the redundant comma (sigh!  Thought I knew commas.)____ > > __ __ > > I am fine with all three suggestions.  I think that the main point > (the source of interop issues) is (a); the other changes definitely > improve readability, but are not showstoppers (imo).____ > > __ __ > > I gather from Greg’s latest email (2017/09/08) and Mach’s email > below that they’re both fine with these changes.  Greg, Mach: speak > up if not.____ > > __ __ > > As for “new interop issues”, the current situation is pretty bad, so > let’s fix it.____ > > __ __ > > As to how to implement these changes, I don’t personally care.  It > seems heavyweight to issue a bis for this, rather than just errata, > but I’m happy to leave that to the WG chairs to decide.____ > > __ __ > > Kireeti.____ > > __ __ > > *From: *"Les Ginsberg (ginsberg)" > > *Date: *Tuesday, August 15, 2017 at 05:16 > *To: *Mach Chen >, "Carlos Pignataro (cpignata)" > >, Greg Mirsky > > > *Cc: *Tom Nadeau >, "mpls@ietf.org > " >, > Kireeti Kompella >, > Alia Atlas >, "Reshad > Rahman (rrahman)" >, > "rtg-bfd@ietf. org " > > *Subject: *RE: [Technical Errata Reported] RFC5884 (5085)____ > > __ __ > > I tend to agree with Mach – and I think what Mach states is also > reinforcing the point that Carlos has made – which is that echo > reply procedures are defined by RFC 8029 – not by RFC 5884.____ > > ____ > > However, the current text suffers from much more than the ambiguity > regarding Echo Reply.____ > > ____ > > 1)Second paragraph of Section 6 goes back and forth between > discussing BFD Control packets, then Echo Reply, then BFD Control > Packets____ > > ____ > > 2)Third paragraph of Section 6 has an inappropriate use of “,” in > the sentence: ____ > > ____ > > “The BFD Control packets from the____ > >    ingress to the egress LSR MUST set the local discriminator of > the____ > >    egress *LSR, in *the Your Discriminator field.”____ > > ____ > > 3)Section 6.1 defines when the BFD Discriminator TLV MUST be sent > and when it is optional in LSP ping. There is actually no need for > Section 6 to say anything in this regard.____ > > ____ > > I propose revised text below – which is much more extensive in its > changes than what has been proposed thus far, but I think it is > necessary to eliminate all ambiguity.____ > > That said, there is no question that the current text is subject to > multiple interpretations – so any change in text runs the risk of > introducing new interoperability issues. On balance it is probably > necessary to take this risk as there is no guarantee that > implementations are interoperable today, but the WG should still > consider this point carefully.____ > > ____ > > The text below replaces current paragraphs 2 and 3 of Section 6.____ > > ____ > > //____ > > /On receipt of the LSP Ping Echo request message, the egress LSR > MUST/____ > > /   send a BFD Control packet to the ingress LSR, if the validation > of/____ > > /   the FEC in the LSP Ping Echo request message succeeds.  This > BFD/____ > > /   Control packet MUST set the Your Discriminator field to the/____ > > /   discriminator received from the ingress LSR in the LSP Ping > Echo/____ > > /   request message.    The local discriminator assigned by the > egress LSR/____ > > /   MUST be used as the My Discriminator field in the BFD session > packets/____ > > /   sent by the egress LSR./____ > > //____ > > /   The ingress LSR follows the procedures in [BFD] to send BFD > Control/____ > > /   packets to the egress LSR in response to the BFD Control > packets/____ > > /   received from the egress LSR.  The BFD Control packets from the/____ > > /   ingress to the egress LSR MUST set the local discriminator of > the/____ > > /   egress LSR in the Your Discriminator field.  The egress LSR/____ > > /   demultiplexes the BFD session based on the received Your/____ > > /   Discriminator field.  As mentioned above, the egress LSR MUST > send/____ > > /   Control packets to the ingress LSR with the Your Discriminator > field/____ > > /   set to the local discriminator of the ingress LSR.  The ingress > LSR/____ > > /   uses this to demultiplex the BFD session./____ > > //____ > > /  The egress LSR follows the procedures defined in [RFC 8029] to > determine when to respond with an LSP Ping Echo  reply message./____ > > //____ > > ____ > >     Les____ > > ____ > > ____ > > *From:*Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *Mach Chen > *Sent:* Tuesday, August 15, 2017 12:56 AM > *To:* Carlos Pignataro (cpignata); Greg Mirsky > *Cc:* Tom Nadeau; mpls@ietf.org ; Kireeti > Kompella (kireeti@juniper.net ); Alia > Atlas; Reshad Rahman (rrahman); rtg-bfd@ietf. org > *Subject:* RE: [Technical Errata Reported] RFC5884 (5085)____ > > ____ > > Hi all,____ > > ____ > > IMHO, the point is not about whether the Echo Reply is optional for > a normal LSP Ping, where the echo reply is totally controlled by the > reply mode. ____ > > ____ > > For RFC5884, since the reply mode is not specified, based on the > current text, it can be interpreted as the following two ways:____ > > 1)it implies a new “mode” introduced, it’s actually a “special” LSP > Ping,  the process is just as what is currently described in the > RFC: an Echo Reply is OPTINAL, whether and when to send Echo Reply > is up to the egress LSR, and the Ingress LSR should not assume an > Echo reply will be returned;____ > > 2)the echo reply is still controlled by the reply mode, and given > that there is a “Do not reply” mode, the current text seems right, > but not that clear. ____ > > ____ > > I incline to think way (2) is more nature, if so,  the proposed > “Corrected Text” may not work if the Sender set the reply mode to > “Do not reply”.____ > > ____ > > I’d suggest:____ > > ____ > > Original Text > ------------- > The egress LSR MAY respond with an LSP Ping Echo > reply message that carries the local discriminator assigned by it for > the BFD session.____ > > ____ > > NEW:____ > > The egress LSR MAY respond with an LSP Ping Echo > reply message that carries the local discriminator assigned by it for > the BFD session. Whether to send an LSP Ping Echo reply message is ____ > > determined by the reply mode carried the received Echo request > message. ____ > > ____ > > Best regards,____ > > Mach____ > > ____ > > *From:*Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org > ] *On Behalf Of *Carlos Pignataro > (cpignata) > *Sent:* Tuesday, August 15, 2017 8:17 AM > *To:* Greg Mirsky > > *Cc:* Tom Nadeau >; mpls@ietf.org > ; Kireeti Kompella (kireeti@juniper.net > ) >; Alia Atlas >; Reshad Rahman (rrahman) > >; rtg-bfd@ietf. org > > > *Subject:* Re: [Technical Errata Reported] RFC5884 (5085)____ > > ____ > > Greg,____ > > ____ > > This is my final email on this topic, since the arguments are now > just silly and not technically constructive. ____ > > ____ > > 1. It's not about understanding English. It's about understanding > specs! The "(if any)" that you quote means there are situations in > which there's no echo reply. As I already explained to you, that's > for example the case with Reply-mode: No-reply. However, the "(if > any)" does not mean an Echo Reply is OPTIONAL. !! Or that you choose > when a reply is not sent!!____ > > 2. RFC 8029 obsoleted 4379. But to my recollection, nothing changed > relevant to this Errata. ____ > > ____ > > BFD for MPLS could have updated LSP ping behavior -- it just didn't. > ____ > > > Sent from my iPad____ > > > On Aug 14, 2017, at 2:12 PM, Greg Mirsky > wrote:____ > > Hi Carlos, ____ > > thank you for sharing your view on how LSP Echo request with BFD > Discriminator used to bootstrap a BFD session over MPLS LSP. I'm > surprised that you refer to RFC 8029 as normative reference when > commenting on RFC 5884. But even if we look into RFC 8029, it > still has the same texts I've quoted in the previous note that > suggest that echo reply is optional. Consider one of them "The > Sender's Handle is filled in by the sender and returned > unchanged by the receiver in the echo reply (if any)." Though > English is my third language, I interpret "if any" in that > sentence as clear indication that the echo reply may not be sent > ever.____ > > ____ > > Regards,____ > > Greg____ > > ____ > > On Fri, Aug 11, 2017 at 7:45 PM, Carlos Pignataro (cpignata) > > wrote:____ > > Jeff, WG, ____ > > ____ > > I believe there is one additional consideration — please see > inline.____ > > ____ > > On Aug 11, 2017, at 1:39 PM, Jeffrey Haas > > wrote:____ > > ____ > > [Note that I have adjusted the addresses in the headers > to try to catch the > RFC authors' current accounts.] > > > The 5884 interop issue keeps bubbling up.  Balaji > submitted an errata, which > provides us with a good place to start technical discussion. > > Please note I also spent some time off-list discussing > this errata with > Balaji. > > > On Thu, Aug 10, 2017 at 10:35:50PM -0700, RFC Errata > System wrote:____ > > Section: 6 > > Original Text > ------------- > The egress LSR MAY respond with an LSP Ping Echo > reply message that carries the local discriminator > assigned by it for > the BFD session. > > Corrected Text > -------------- > The egress LSR MUST respond with an LSP Ping Echo > reply message that > MAY carry the local discriminator assigned by it for > the BFD session. > > > Notes > ----- > It is not clear from the original text which of the > following is optional: >  -  The egress MUST send a reply, but the > discriminator in the reply is optional >  -  The reply itself is optional > > Technically, the reply cannot be optional, because > the egress needs to report LSP-Ping verification > status to the ingress.____ > > ____ > > This is correct — but even more so, technically, it is not > up to RFC 5884 to define when an LSP-Ping reply is optional > or not.____ > > ____ > > That’s’ up to > https://tools.ietf.org/html/rfc8029#section-4.4 > ____ > > ____ > > Lacking a Reply Mode set to "Do not reply" > (https://tools.ietf.org/html/rfc8029#page-12 > ) the RFC 8029 > procedures dictate a response be sent, independent of > whether the RFC 5884 procedures use that information or not.____ > > ____ > > More below.____ > > ____ > > > The proposed text recommends to include BFD > discriminator in the reply. This was the intent of > the original text.____ > > > My opinion follows: > > In section 6 - > > :    On receipt of the LSP Ping Echo request message, > the egress LSR MUST > :    send a BFD Control packet to the ingress LSR, if > the validation of > :    the FEC in the LSP Ping Echo request message > succeeds.  This BFD > :    Control packet MUST set the Your Discriminator > field to the > :    discriminator received from the ingress LSR in the > LSP Ping Echo > :    request message.  The egress LSR MAY respond with > an LSP Ping Echo > :    reply message that carries the local discriminator > assigned by it for > :    the BFD session.  The local discriminator assigned > by the egress LSR > :    MUST be used as the My Discriminator field in the > BFD session packets > :    sent by the egress LSR. > > In the text above, I consider it quite clear that the > receipt of the BFD > packet contains sufficient state to bring up the BFD > session.  The receipt > of the same Discriminator in the LSP Ping Echo Reply is > optional. > > This makes sense partially because the reply may be > dropped and we want the > BFD session to come up as fast as possible.____ > > ____ > > Yes, especially because the first sentence says that the > egress sending a BFD Control packet implies FEC validation > passed. However, > https://tools.ietf.org/html/rfc8029#section-4.4 > does more > than FEC validation.____ > > ____ > > > The point of contention appears to be what to do if we > *never* get such > replies.  It's worth pointing out additional text in RFC > 5884, section 3.2. > > :    Hence, BFD is used in conjunction with LSP Ping for > MPLS LSP fault > :    detection: > : > :       i) LSP Ping is used for bootstrapping the BFD > session as described > :          later in this document. > : > :      ii) BFD is used to exchange fault detection > (i.e., BFD session) > :          packets at the required detection interval. > : > :     iii) LSP Ping is used to periodically verify the > control plane > :          against the data plane by ensuring that the > LSP is mapped to > :          the same FEC, at the egress, as the ingress. > > iii above reminds us that the LSP may be torn down > because LSP Ping fails. > Thus, it seems problematic that we do not get a reply ever. > > However, with the BFD session in the Up state, we have > information proving > that the LSP is up.  Thus we have contradictory intent. > > --- > > My opinion is that the MAY in the RFC 5884 procedures is > intended to have > the BFD session come up by the most expedient means.  I > do not believe the > likely intent was to say "don't send Echo Reply".  Among > other things, that > seems contrary to the intent of the general LSP Ping > procedures. > > Having given my personal observations, we now get to the > business of the > Working Group: Debating intent and related text. ____ > > ____ > > My individual opinion is that, as written, RFC 5884 cannot > mean any other thing that “ The egress LSR MUST respond with > an LSP Ping Echo reply message that____ > > MAY carry the local discriminator assigned by it for the BFD > session”.____ > > ____ > > In other words, I support this errata.____ > > ____ > > This is because RFC 5884 did not update RFC 4379’s > procedures. And thus a response is needed based on 8029 > irregardless of whether 5884 uses it.____ > > ____ > > That said, it is debatable whether that LSP Ping response is > useful or not. If it is not sent, it does not comply to > 8029. But if the WG wants for it to be not send, a new spec > is needed.____ > > ____ > > Thanks,____ > > ____ > > -- Jeff____ > > ____ > > —____ > > Carlos Pignataro, carlos@cisco.com > > /“Sometimes I use big words that I do not fully understand, > to make myself sound more photosynthesis."/____ > > ____ > > ____ > > -- Loa Andersson email: loa@pi.nu Senior MPLS Expert Huawei Technologies (consultant) phone: +46 739 81 21 64 From nobody Wed Oct 11 06:47:04 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 64A711342F8; Wed, 11 Oct 2017 06:46:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.699 X-Spam-Level: X-Spam-Status: No, score=-2.699 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_LOW=-0.7, 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 izR_Y0ajaVsy; Wed, 11 Oct 2017 06:46:55 -0700 (PDT) Received: from mail-lf0-x232.google.com (mail-lf0-x232.google.com [IPv6:2a00:1450:4010:c07::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 13D2B1342E7; Wed, 11 Oct 2017 06:46:55 -0700 (PDT) Received: by mail-lf0-x232.google.com with SMTP id a16so2160064lfk.0; Wed, 11 Oct 2017 06:46:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=qBlca3h0f8YEXQ8Ti/RGMb8x32Iet7ep+utc0XZcE5M=; b=dk0bzZMN9JWmAnreDfCgu/pKKk7FjV6r1DS1dtfmedFX34BbUsvWrZ4HPM+NjvGIC+ 2BcOSy2huak+IAYeQISgB1DoxkiCV48N721qGe+YUmeGtv2QRsIheW5zXjy73ENfkoZ5 d9NNeIHoUF5bAVk8ddGvKi8ZRzCYRgwcLOZPJLRx0iwcSl99B/JCR2AfEsWS2LH+2b5B cxDOkecsTewkC49GPhrnofT/+xTRUgVe8cg57JfUNKBbCINkCiIJaKVc3G94uXm9/oD2 z8TsqvVtAQo7STgrd8HdGkWHA7z/0rzhBgNUE0TZ0sq8nMbm48GdRDamFvuUv3YDrbzV jJ4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=qBlca3h0f8YEXQ8Ti/RGMb8x32Iet7ep+utc0XZcE5M=; b=RXyjU/DJe5dENv5O+tMyff0kBIt1IbjgdK1JkSI1/yFuILJddeuraNwYUlsSAH04Nd Qjiw7jhJXdOdCgJ3mr3jnxgJQnbsLcBNhPwH5ATgrRFxrTldUK1yvaKrXXKJ8ZGu80Sq McuD6P9ACgoPQfgzNS5Vq6DWQquqFrDkl9crU9yBkPD4232HbiFBn2ufFq0y9IkXx3W3 HkzuQXgKSBLq74vpc0aFLvaOq0Or9EKue4J6bvoU7tkkEn6Nh19ODM6xtVVs1epQ03Ii UCg6+Cd+o3TdDeRbtUW7iZJvV04+5n6JNGKdaOUSPi5J5xZoo8Lxe12fzKVqHPSD45kn hOQQ== X-Gm-Message-State: AMCzsaVWegGz+VLkcohaU2bFZUV7fFM8B/Tp4omHTBdTWeQ+iGV9TAdp L6rY7VA5QrYT9kbBMiNHlE8MkVaZ+dDrX9beVbc= X-Google-Smtp-Source: AOwi7QCjFfOGRYgYKWnNk7zYymTr7zoWx/uOVi35ap/VdBCnKSop5y+YpZm1yBF5HCbzANNH6PQqNqbh1RWrx4pPgqU= X-Received: by 10.25.205.149 with SMTP id d143mr6325636lfg.147.1507729612944; Wed, 11 Oct 2017 06:46:52 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.32.147 with HTTP; Wed, 11 Oct 2017 06:46:52 -0700 (PDT) In-Reply-To: <150772937429.24819.12605384937589669944.idtracker@ietfa.amsl.com> References: <150772937429.24819.12605384937589669944.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Wed, 11 Oct 2017 06:46:52 -0700 Message-ID: Subject: Fwd: New Version Notification for draft-spallagatti-bfd-vxlan-06.txt To: "nvo3@ietf.org" , "rtg-bfd@ietf.org" Content-Type: multipart/alternative; boundary="001a11412192ff3c11055b45a7a5" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Oct 2017 13:46:57 -0000 --001a11412192ff3c11055b45a7a5 Content-Type: text/plain; charset="UTF-8" Dear All, the new version of BFD over VXLAN includes minor editorial updates and the new figure to highlight encapsulation of a BFD control message over VXLAN. Your comments and questions are always welcome and greatly appreciated. Authors would like NVO3 WG to consider adoption of this work. Regards, Greg ---------- Forwarded message ---------- From: Date: Wed, Oct 11, 2017 at 6:42 AM Subject: New Version Notification for draft-spallagatti-bfd-vxlan-06.txt To: Gregory Mirsky , Mallik Mudigonda < mmudigon@cisco.com>, Sudarsan Paragiri , Vengada Prasad Govindan , Santosh Pallagatti < santosh.pallagatti@gmail.com> A new version of I-D, draft-spallagatti-bfd-vxlan-06.txt has been successfully submitted by Greg Mirsky and posted to the IETF repository. Name: draft-spallagatti-bfd-vxlan Revision: 06 Title: BFD for VXLAN Document date: 2017-10-13 Group: Individual Submission Pages: 10 URL: https://www.ietf.org/internet-drafts/draft-spallagatti-bfd- vxlan-06.txt Status: https://datatracker.ietf.org/doc/draft-spallagatti-bfd- vxlan/ Htmlized: https://tools.ietf.org/html/draft-spallagatti-bfd-vxlan-06 Htmlized: https://datatracker.ietf.org/doc/html/draft-spallagatti- bfd-vxlan-06 Diff: https://www.ietf.org/rfcdiff?url2=draft-spallagatti-bfd- vxlan-06 Abstract: This document describes use of Bidirectional Forwarding Detection (BFD) protocol in Virtual eXtensible Local Area Network (VXLAN) overlay network. 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 --001a11412192ff3c11055b45a7a5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
the new version of BFD over VXLAN includes m= inor editorial updates and the new figure to highlight encapsulation of a B= FD control message over VXLAN. Your comments and questions are always welco= me and greatly appreciated.
Authors would like NVO3 WG to conside= r adoption of this work.

Regards,
Greg

---------- Forwarded message ------= ----
From: <internet-drafts@ietf.org>
Date: Wed, Oct 11, 2017 at 6:42 AM
Subject: New Version Notifica= tion for draft-spallagatti-bfd-vxlan-06.txt
To: Gregory Mirsky <gregimirsky@gmail.com>, Mallik M= udigonda <mmudigon@cisco.com&g= t;, Sudarsan Paragiri <sparagir= i@juniper.net>, Vengada Prasad Govindan <venggovi@cisco.com>, Santosh Pallagatti <santosh.pallagatti@gmail.com><= br>


A new version of I-D, draft-spallagatti-bfd-vxlan-06.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-spallagatti-bfd-vxlan Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A006
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD for VXLAN
Document date:=C2=A0 2017-10-13
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 10
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draft-spallagatt= i-bfd-vxlan-06.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-spallagatti-bfd-vxlan/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https:= //tools.ietf.org/html/draft-spallagatti-bfd-vxlan-06
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-spallagatti-bfd-v= xlan-06
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-spallagatti-bfd-= vxlan-06

Abstract:
=C2=A0 =C2=A0This document describes use of Bidirectional Forwarding Detect= ion
=C2=A0 =C2=A0(BFD) protocol in Virtual eXtensible Local Area Network (VXLAN= )
=C2=A0 =C2=A0overlay network.




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


--001a11412192ff3c11055b45a7a5-- From nobody Sat Oct 14 08:21:29 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3CA691323F7; Sat, 14 Oct 2017 08:21:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.398 X-Spam-Level: X-Spam-Status: No, score=-2.398 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.199, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, 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 JByrKJIL3N4y; Sat, 14 Oct 2017 08:21:18 -0700 (PDT) Received: from mail-qk0-x232.google.com (mail-qk0-x232.google.com [IPv6:2607:f8b0:400d:c09::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 CF76213304A; Sat, 14 Oct 2017 08:21:17 -0700 (PDT) Received: by mail-qk0-x232.google.com with SMTP id b15so8251185qkg.9; Sat, 14 Oct 2017 08:21:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=nwT6H9EnmmmVL5XyJAOqqD0fGFn4NEg4PgCmU/iucOI=; b=TkDhbE8nM22orX9XO+BuxmDGh5fp2O5eQ4+crTDvzNxj0LZhHPNwcLrxGUk45/Uyzk XQxQeXsiIRSHR8qYzoxb1xmH1ZlycMLfoYcbZIuvLYSjUhOYQ+eaNOPiNZWvZbDOBGIZ 4BH3KVkIXixN701QKeC4oAbD+P7shdLscIhK++zh9Ct/fO3DwjJSoDuk9rPxE7SwNPzL Bl2KZV1nzRQ84ZlIms3SQxlUZ61+gV/VX9zCONqDD8U8+NUdAFKDN98A1C+oVG2+rV0j SR3Qx+JCOlKxd3kvA4W485rXUJLI8JeBOyGlvpBtWFG4iUkf882IFaFnr7i7VaTjFeTY BC7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=nwT6H9EnmmmVL5XyJAOqqD0fGFn4NEg4PgCmU/iucOI=; b=D36kXMJdA1PBrFpM0KgtgwVZO0ytuNb1tqv97LsPtTEvhMopyT87V5Xjz3t0B4Nhmd UvYshGXYdOboZf7IhFeGErLPEb0ObBcnkMSx7sSzbkdAfTPNIV2DsjUUuMOzXW2i8cKX J7OlA8i+kZCQ6/WKTha8EofBadeLjhJDumFLikusjhef3lNblXf49NTP1SdYazTWGyly CzAlg1xT1HoimqKBD2SXQ0lIXT+uTYqDffQCeRUS4+7yOJwg5R7PRRK2BskFqOqEFxhG Ma9g/uV9zzNzYGzbz1hN4qQYbxFmFM0+HSoFJry9Z4uHgZjeLk3ehdE+td0cCnlvP9X+ vzWQ== X-Gm-Message-State: AMCzsaV9RXJkSm6WVKcUCJY1IiEX/Cdj7K1IfAhv54/o9NhF3Nj2+aFb FzPjIQx7KzSg3zPnKC8mU2K/C2VcAfwRzKolRVg= X-Google-Smtp-Source: ABhQp+RDCLJ5fohpofLy4Bg5JKk0A/X9ab7fcuzdbOrzgLsU2BXKWk6AFkeuY9Svj902DWRV5gPWHX66jc8hozsqAVk= X-Received: by 10.55.167.144 with SMTP id q138mr6242117qke.160.1507994476978; Sat, 14 Oct 2017 08:21:16 -0700 (PDT) MIME-Version: 1.0 Sender: ghanwani@gmail.com Received: by 10.237.33.1 with HTTP; Sat, 14 Oct 2017 08:21:16 -0700 (PDT) In-Reply-To: References: <150772937429.24819.12605384937589669944.idtracker@ietfa.amsl.com> From: Anoop Ghanwani Date: Sat, 14 Oct 2017 08:21:16 -0700 X-Google-Sender-Auth: _z9H3n7GSki9X1Cv2N7El1NHoOg Message-ID: Subject: Re: [nvo3] Fwd: New Version Notification for draft-spallagatti-bfd-vxlan-06.txt To: Greg Mirsky Cc: "nvo3@ietf.org" , "rtg-bfd@ietf.org" Content-Type: multipart/alternative; boundary="94eb2c06c8621fa5f7055b8353c7" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Oct 2017 15:21:20 -0000 --94eb2c06c8621fa5f7055b8353c7 Content-Type: text/plain; charset="UTF-8" Since the NVO3 WG is moving forward with standardization of only the Geneve encap, shouldn't this draft be written for BFD on Geneve? I guess I'm looking for direction from the chairs and AD as to whether the WG can/should spend time standardizing anything over VXLAN given that VXLAN itself is not a WG standard. Back to the draft -- if this were written for Geneve, I would expect it to cover both L2 and L3 over Geneve. Thanks, Anoop On Wed, Oct 11, 2017 at 6:46 AM, Greg Mirsky wrote: > Dear All, > the new version of BFD over VXLAN includes minor editorial updates and the > new figure to highlight encapsulation of a BFD control message over VXLAN. > Your comments and questions are always welcome and greatly appreciated. > Authors would like NVO3 WG to consider adoption of this work. > > Regards, > Greg > > ---------- Forwarded message ---------- > From: > Date: Wed, Oct 11, 2017 at 6:42 AM > Subject: New Version Notification for draft-spallagatti-bfd-vxlan-06.txt > To: Gregory Mirsky , Mallik Mudigonda < > mmudigon@cisco.com>, Sudarsan Paragiri , Vengada > Prasad Govindan , Santosh Pallagatti < > santosh.pallagatti@gmail.com> > > > > A new version of I-D, draft-spallagatti-bfd-vxlan-06.txt > has been successfully submitted by Greg Mirsky and posted to the > IETF repository. > > Name: draft-spallagatti-bfd-vxlan > Revision: 06 > Title: BFD for VXLAN > Document date: 2017-10-13 > Group: Individual Submission > Pages: 10 > URL: https://www.ietf.org/internet- > drafts/draft-spallagatti-bfd-vxlan-06.txt > Status: https://datatracker.ietf.org/ > doc/draft-spallagatti-bfd-vxlan/ > Htmlized: https://tools.ietf.org/html/draft-spallagatti-bfd-vxlan-06 > Htmlized: https://datatracker.ietf.org/ > doc/html/draft-spallagatti-bfd-vxlan-06 > Diff: https://www.ietf.org/rfcdiff? > url2=draft-spallagatti-bfd-vxlan-06 > > Abstract: > This document describes use of Bidirectional Forwarding Detection > (BFD) protocol in Virtual eXtensible Local Area Network (VXLAN) > overlay network. > > > > > 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 > > > > _______________________________________________ > nvo3 mailing list > nvo3@ietf.org > https://www.ietf.org/mailman/listinfo/nvo3 > > --94eb2c06c8621fa5f7055b8353c7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Since the NVO3 WG is moving forward with standardization o= f only the Geneve encap, shouldn't this draft be written for BFD on Gen= eve?

I guess I'm looking for direction from the chai= rs and AD as to whether the WG can/should spend time standardizing anything= over VXLAN given that VXLAN itself is not a WG standard.

Back to the draft -- if this were written for Geneve, I would expec= t it to cover both L2 and L3 over Geneve.

Thanks,<= /div>
Anoop

On Wed, Oct 11, 2017 at 6:46 AM, Greg Mirsky &l= t;gregimirsky@gm= ail.com> wrote:
Dear All,
the new version of BFD over VXLAN includes minor editor= ial updates and the new figure to highlight encapsulation of a BFD control = message over VXLAN. Your comments and questions are always welcome and grea= tly appreciated.
Authors would like NVO3 WG to consider adoption = of this work.

Regards,
Greg
---------- Forwarded message ----------
Fro= m: <internet-drafts@ietf.org= >
Date: Wed, Oct 11, 2017 at 6:42 AM
Subject: New Version N= otification for draft-spallagatti-bfd-vxlan-06.txt
To: Gregory Mirs= ky <gregimirs= ky@gmail.com>, Mallik Mudigonda <mmudigon@cisco.com>, Sudarsan Paragiri <<= a href=3D"mailto:sparagiri@juniper.net" target=3D"_blank">sparagiri@juniper= .net>, Vengada Prasad Govindan <venggovi@cisco.com>, Santosh Pallagatti <<= a href=3D"mailto:santosh.pallagatti@gmail.com" target=3D"_blank">santosh.pa= llagatti@gmail.com>



A new version of I-D, draft-spallagatti-bfd-vxlan-06.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-spallagatti-bfd-vxlan Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A006
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD for VXLAN
Document date:=C2=A0 2017-10-13
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 10
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draft-spallagatt= i-bfd-vxlan-06.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-spallagatti-bfd-vxlan/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https:= //tools.ietf.org/html/draft-spallagatti-bfd-vxlan-06
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-spallagatti-bfd-v= xlan-06
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-spallagatti-bfd-= vxlan-06

Abstract:
=C2=A0 =C2=A0This document describes use of Bidirectional Forwarding Detect= ion
=C2=A0 =C2=A0(BFD) protocol in Virtual eXtensible Local Area Network (VXLAN= )
=C2=A0 =C2=A0overlay network.




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



_______________________________________________
nvo3 mailing list
nvo3@ietf.org
https://www.ietf.org/mailman/listinfo/nvo3


--94eb2c06c8621fa5f7055b8353c7-- From nobody Wed Oct 18 05:50:58 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1D2091342F6; Wed, 18 Oct 2017 05:50:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.698 X-Spam-Level: X-Spam-Status: No, score=-2.698 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_LOW=-0.7, 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 RssQVgagzH-n; Wed, 18 Oct 2017 05:50:49 -0700 (PDT) Received: from mail-lf0-x234.google.com (mail-lf0-x234.google.com [IPv6:2a00:1450:4010:c07::234]) (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 ED90F12421A; Wed, 18 Oct 2017 05:50:48 -0700 (PDT) Received: by mail-lf0-x234.google.com with SMTP id d10so5674962lfg.11; Wed, 18 Oct 2017 05:50:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=hcgYGEIyROFrt0mIXLE3MTuIDT8T84LcAPONa+ohX8s=; b=t8wTdsRMAg6zckowGHXTFwjDcMUGwxZwDP0LHVFewzJVtQ7fFCnwe39cug27xLXrSL weIjAJy+JvSfM6JRfxWQCMR9RFlmvIwgGfV/ZViM+F1oourhNmFGSgaEv5br0xsp5Rdz oRhBI3TIYt27ePzhqfPUOoDiM/ECCver6KcD0d1/9qI0SiQXwEOfhJ8SmVuYm+sY+o8c TNCKi4Vlfk9SBAKv4Phfsa+baIUapT0DUFkDfrxMIDtSJbAQpZh1BhuXqsd/fz9zrJin LUgem6AM4kwAPkrEqE1M7ZG1M8cyE9Zs1r+j4Z6+fio8nvjQUXLUBC4HrgUTkqEZi081 pCFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=hcgYGEIyROFrt0mIXLE3MTuIDT8T84LcAPONa+ohX8s=; b=WXlFrzIhHSGxdwT8szOiv38RqR4r3lj4Mbt8fhb3HZTVTC8WgDo/Y1t8CrhkbTD8xk AoHed49Hb9YsJOUPZRn17u0XGgwZ7W4IezJR+BmLbjt3IeMs2+lH/4qQOZFlbXgedyHL bUQN8+BoYGxFFEnPPTsLgt1M0t7b/GRDW6tnNLDYtZbjJRsDAtP2Q175o8IuMAydxXKq vM8wcLB2nVG5K/xh0UEng2Wje7/V6F1cDD9fm+O7z0rGwvVtw0hcbZDo3NAdslhoMojp O5w8ctEq/M6b95lCJv8GI/XzMKHI5rQ1BiIPOxbUgWCPzyVLm4u7w3voZTd7oW6KnMBI ka/Q== X-Gm-Message-State: AMCzsaVQqMCs012JHSNc/rUWg8ef4YBt1alcJwAIX55CRcBSf+fpteeu /4cuo6hJAighq6szfeGvEQgQX9P/vCc+hUKhXW0= X-Google-Smtp-Source: ABhQp+TfZySjxFS9NEY/LeOaDO0s4eQfD2212jRu8Fg2PVDjhCup8sgdDFdm4dTHwC/k3TpYy6QENtFVivelEZxpx9E= X-Received: by 10.25.145.80 with SMTP id y16mr5433416lfj.102.1508331046676; Wed, 18 Oct 2017 05:50:46 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.32.147 with HTTP; Wed, 18 Oct 2017 05:50:46 -0700 (PDT) In-Reply-To: <150833078446.12462.3050923622769989740.idtracker@ietfa.amsl.com> References: <150833078446.12462.3050923622769989740.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Wed, 18 Oct 2017 05:50:46 -0700 Message-ID: Subject: Fwd: New Version Notification for draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt To: "mpls@ietf.org" , "rtg-bfd@ietf.org" Content-Type: multipart/alternative; boundary="94eb2c1cd2f23dacb9055bd1b055" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Oct 2017 12:50:51 -0000 --94eb2c1cd2f23dacb9055bd1b055 Content-Type: text/plain; charset="UTF-8" Dear All, this new document proposes clarification of two questions brought up in course of recent discussion of RFC 5884: - use of Return mode values in bootstrapping BFD session echo request; - inclusion of BFD Discriminator TLV in echo response to the bootstrapping echo request. Your comments, questions are always welcome and greatly appreciated. Regards, Greg ---------- Forwarded message ---------- From: Date: Wed, Oct 18, 2017 at 5:46 AM Subject: New Version Notification for draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt To: Gregory Mirsky , Yanhua Zhao < zhao.yanhua3@zte.com.cn> A new version of I-D, draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt has been successfully submitted by Greg Mirsky and posted to the IETF repository. Name: draft-mirsky-mpls-bfd-bootstrap-clarify Revision: 00 Title: Clarifying Use of LSP Ping to Bootstrap BFD over MPLS LSP Document date: 2017-10-18 Group: Individual Submission Pages: 4 URL: https://www.ietf.org/internet-drafts/draft-mirsky-mpls-bfd- bootstrap-clarify-00.txt Status: https://datatracker.ietf.org/doc/draft-mirsky-mpls-bfd- bootstrap-clarify/ Htmlized: https://tools.ietf.org/html/draft-mirsky-mpls-bfd- bootstrap-clarify-00 Htmlized: https://datatracker.ietf.org/doc/html/draft-mirsky-mpls- bfd-bootstrap-clarify-00 Abstract: This document, if approved, updates RFC 5884 by clarifying procedures for using MPLS LSP ping to bootstrap Bidirectional Forwarding Detection (BFD) over MPLS Label Switch Path. 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 --94eb2c1cd2f23dacb9055bd1b055 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
this new document proposes clarification of = two questions brought up in course of recent discussion of RFC 5884:
<= div>
  • use of Return mode values in bootstrapping BFD session echo req= uest;
  • inclusion of BFD Discriminator TLV in echo response to the bo= otstrapping echo request.
Your comments, questions are always= welcome and greatly appreciated.

Regards,
Greg

---------- Forwarded= message ----------
From: <internet-drafts@ie= tf.org>
Date: Wed, Oct 18, 2017 at 5:46 AM
Subject: New= Version Notification for draft-mirsky-mpls-bfd-bootstrap-clarify-00.txtTo: Gregory Mirsky <gregimirsk= y@gmail.com>, Yanhua Zhao <zhao.yanhua3@zte.com.cn>



A new version of I-D, draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-mpls-bfd-bo= otstrap-clarify
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Clarifying Use of LSP Ping to Boot= strap BFD over MPLS LSP
Document date:=C2=A0 2017-10-18
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 4
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draf= t-mirsky-mpls-bfd-bootstrap-clarify-00.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-mirsky-mpls-bfd-<= wbr>bootstrap-clarify/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://tools.ietf.org/html/draft-mirsky-mpls-bfd-bootstrap= -clarify-00
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-mirsky-mpl= s-bfd-bootstrap-clarify-00


Abstract:
=C2=A0 =C2=A0This document, if approved, updates RFC 5884 by clarifying pro= cedures
=C2=A0 =C2=A0for using MPLS LSP ping to bootstrap Bidirectional Forwarding<= br> =C2=A0 =C2=A0Detection (BFD) over MPLS Label Switch Path.




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


--94eb2c1cd2f23dacb9055bd1b055-- From nobody Fri Oct 20 05:54:35 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 676E1133011; Fri, 20 Oct 2017 05:54:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.519 X-Spam-Level: X-Spam-Status: No, score=-14.519 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, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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 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 obAmkEbWgzp4; Fri, 20 Oct 2017 05:54:25 -0700 (PDT) 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08:54:23 -0400 From: "Carlos Pignataro (cpignata)" To: Greg Mirsky CC: "mpls@ietf.org" , "rtg-bfd@ietf.org" Subject: Re: [mpls] New Version Notification for draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt Thread-Topic: [mpls] New Version Notification for draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt Thread-Index: AQHTSaKNQv/vxpuNgkGxEXSkWX93Sg== Date: Fri, 20 Oct 2017 12:54:23 +0000 Message-ID: References: <150833078446.12462.3050923622769989740.idtracker@ietfa.amsl.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.118.116.133] Content-Type: multipart/alternative; boundary="_000_D0AA7372C4D2416BAAA33A0229E639ABciscocom_" MIME-Version: 1.0 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Oct 2017 12:54:27 -0000 --_000_D0AA7372C4D2416BAAA33A0229E639ABciscocom_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 R3JlZywNCg0KVGhpcyBkb2N1bWVudCBzZWVtcyB0byBzYXkg4oCcdXNlIOKAnERvIG5vdCBSZXBs eeKAnSByZXBseSBtb2RlLCBhbmQgZXZlbiBpZiB5b3UgcmVwbHkgZG8gbm90IHVzZSB0aGUgQkZE IERpc2MgVExWLCBiZWNhdXNlIGl0IGlzIG5vdCB1c2VkLg0KDQpXb3VsZG7igJl0IGl0IGJlIHNp bXBsZXIgdG8gc2F5IOKAnGZvbGxvdyBSRkMgODAyOSwgYW5kIHRoZSBpbmdyZXNzIGRvZXMgbm90 IGNhcmUgYWJvdXQgdGhlIEJGRCBEaXNjIFRMViBpbiB0aGUgcmVwbHnigJ0/IFRoaXMgd291bGQg bm90IHN1ZGRlbmx5IG1ha2UgdW5jb21wbGlhbnQgZXhpc3RpbmcgaW1wbGVtZW50YXRpb25zLCBw b3RlbnRpYWxseS4NCg0KQWxzbyBJIHdvbmRlciBpZiB0aGlzIHNob3VsZCBiZSBiZmQtbXBscyBp bnN0ZWFkIG9mIG1wbHMtYmZkLCBnaXZlbiB3aGVyZSBSRkMgNTg4NCB3YXMgYWR2YW5jZWQuDQoN ClRoYW5rcywNCg0K4oCUDQpDYXJsb3MgUGlnbmF0YXJvLCBjYXJsb3NAY2lzY28uY29tPG1haWx0 bzpjYXJsb3NAY2lzY28uY29tPg0KDQrigJxTb21ldGltZXMgSSB1c2UgYmlnIHdvcmRzIHRoYXQg 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AMCzsaX4UeF7mAflYBXfuXmJFx+ItX0cn1gKBnXzoJWFM6jybaQDMs13 v+KoL9+bd6bT6aZ4wtXHg3+hpkFRnSY37xM6ahI= X-Google-Smtp-Source: ABhQp+RWMjYdWVWKBD377ckxxfP793/lyFv/FCohXlBF7uv2vVJRdM1dRYos11LWnZCJgwmU+cdguyInbpkp47uJj3A= X-Received: by 10.25.18.35 with SMTP id h35mr1947612lfi.73.1508512726819; Fri, 20 Oct 2017 08:18:46 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.32.147 with HTTP; Fri, 20 Oct 2017 08:18:46 -0700 (PDT) In-Reply-To: References: <150833078446.12462.3050923622769989740.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Fri, 20 Oct 2017 08:18:46 -0700 Message-ID: Subject: Re: [mpls] New Version Notification for draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt To: "Carlos Pignataro (cpignata)" Cc: "mpls@ietf.org" , "rtg-bfd@ietf.org" Content-Type: multipart/alternative; boundary="001a113fbed238a96b055bfbfded" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Oct 2017 15:18:53 -0000 --001a113fbed238a96b055bfbfded Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Carlos, thank you for taking interest in the proposal, much appreciated. Please find my notes in-line and tagged GIM>>. Regards, Greg On Fri, Oct 20, 2017 at 5:54 AM, Carlos Pignataro (cpignata) < cpignata@cisco.com> wrote: > Greg, > > This document seems to say =E2=80=9Cuse =E2=80=9CDo not Reply=E2=80=9D re= ply mode, and even if you > reply do not use the BFD Disc TLV, because it is not used. > GIM>> To be precise it says "SHOULD use "Do not Reply" thus preserving compliance of implementations that do otherwise. > > Wouldn=E2=80=99t it be simpler to say =E2=80=9Cfollow RFC 8029, and the i= ngress does not > care about the BFD Disc TLV in the reply=E2=80=9D? This would not suddenl= y make > uncompliant existing implementations, potentially. > GIM>> I agree that normative language on handling echo reply is bit restrictive. My goal is to have good discussion and see what others think. > > Also I wonder if this should be bfd-mpls instead of mpls-bfd, given where > RFC 5884 was advanced. > GIM>> Probably it should be the way you've suggested. Hope it is not a big problem for individual draft. > > Thanks, > > =E2=80=94 > Carlos Pignataro, carlos@cisco.com > > *=E2=80=9CSometimes I use big words that I do not fully understand, to ma= ke myself > sound more photosynthesis."* > > On Oct 18, 2017, at 8:50 AM, Greg Mirsky wrote: > > Dear All, > this new document proposes clarification of two questions brought up in > course of recent discussion of RFC 5884: > > - use of Return mode values in bootstrapping BFD session echo request; > - inclusion of BFD Discriminator TLV in echo response to the > bootstrapping echo request. > > Your comments, questions are always welcome and greatly appreciated. > > Regards, > Greg > > ---------- Forwarded message ---------- > From: > Date: Wed, Oct 18, 2017 at 5:46 AM > Subject: New Version Notification for draft-mirsky-mpls-bfd- > bootstrap-clarify-00.txt > To: Gregory Mirsky , Yanhua Zhao < > zhao.yanhua3@zte.com.cn> > > > > A new version of I-D, draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt > has been successfully submitted by Greg Mirsky and posted to the > IETF repository. > > Name: draft-mirsky-mpls-bfd-bootstrap-clarify > Revision: 00 > Title: Clarifying Use of LSP Ping to Bootstrap BFD over MPLS LSP > Document date: 2017-10-18 > Group: Individual Submission > Pages: 4 > URL: https://www.ietf.org/internet- > drafts/draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt > Status: https://datatracker.ietf.org/ > doc/draft-mirsky-mpls-bfd-bootstrap-clarify/ > Htmlized: https://tools.ietf.org/html/d > raft-mirsky-mpls-bfd-bootstrap-clarify-00 > Htmlized: https://datatracker.ietf.org/ > doc/html/draft-mirsky-mpls-bfd-bootstrap-clarify-00 > > > Abstract: > This document, if approved, updates RFC 5884 by clarifying procedures > for using MPLS LSP ping to bootstrap Bidirectional Forwarding > Detection (BFD) over MPLS Label Switch Path. > > > > > 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 > > > _______________________________________________ > mpls mailing list > mpls@ietf.org > https://www.ietf.org/mailman/listinfo/mpls > > > --001a113fbed238a96b055bfbfded Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Carlos,
thank you for taking interest in the propos= al, much appreciated. Please find my notes in-line and tagged GIM>>.<= /div>

Regards,
Greg

On Fri, Oct 20, 2017 at 5:54 AM, Carlo= s Pignataro (cpignata) <cpignata@cisco.com> wrote:
Greg,

This document seems to say =E2=80=9Cuse =E2=80=9CDo not Reply=E2=80=9D= reply mode, and even if you reply do not use the BFD Disc TLV, because it = is not used.
GIM>> To be precise it says= "SHOULD use "Do not Reply" thus preserving compliance of im= plementations that do otherwise.=C2=A0
=

Wouldn=E2=80=99t it be simpler to say =E2=80=9Cfollow RFC 8029, and th= e ingress does not care about the BFD Disc TLV in the reply=E2=80=9D? This = would not suddenly make uncompliant existing implementations, potentially.<= /div>
GIM>> I agree that normative language on= handling echo reply is bit restrictive. My goal is to have good discussion= and see what others think.

Also I wonder if this should be bfd-mpls instead of mpls-bfd, given wh= ere RFC 5884 was advanced.
GIM>> Probabl= y it should be the way you've suggested. Hope it is not a big problem f= or individual draft.=C2=A0

Thanks,

=E2=80=94
Carlos Pignataro,=C2=A0carlos@cisco.com

=E2=80=9CSometimes I use big words that I do not fully understand, to ma= ke myself sound more photosynthesis."

On Oct 18, 2017, at 8:50 AM, Greg Mirsky <gregimirsky@gmail.com> wrote:
Dear All,
this new document proposes clarification of two questions brought up i= n course of recent discussion of RFC 5884:
  • use of Return mode values in bootstrapping BFD session echo request;
  • inclusion of BFD Discriminator TLV in echo response to the bootstrapp= ing echo request.
Your comments, questions are always welcome and greatly appreciated.

Regards,
Greg

---------- Forwarded message ----------
From: <internet-drafts@ietf.org>
Date: Wed, Oct 18, 2017 at 5:46 AM
Subject: New Version Notification for draft-mirsky-mpls-bfd-bootstrap-= clarify-00.txt
To: Gregory Mirsky <gregimirsky@gmail.com>, Yanhua Zhao <zhao.yanhua3@zte.com.cn>



A new version of I-D, draft-mirsky-mpls-bfd-bootstrap-clarify-00.txt has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-mpls-bfd-bootstr= ap-clarify
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Clarifying Use of LSP Ping to Boot= strap BFD over MPLS LSP
Document date:=C2=A0 2017-10-18
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 4
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draft-mirsky-mpls-bfd-bootst= rap-clarify-00.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-mirsky-mpls-bfd-b= ootstrap-clarify/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://tools.ietf.org/html/draft-mirsky-mpls-bfd-bootstrap= -clarify-00
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-mirsky-mpl= s-bfd-bootstrap-clarify-00


Abstract:
=C2=A0 =C2=A0This document, if approved, updates RFC 5884 by clarifying pro= cedures
=C2=A0 =C2=A0for using MPLS LSP ping to bootstrap Bidirectional Forwarding<= br> =C2=A0 =C2=A0Detection (BFD) over MPLS Label Switch Path.




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


_______________________________________________
mpls mailing list
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--001a113fbed238a96b055bfbfded-- From nobody Tue Oct 24 05:32:34 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BD3ED13F3D0; Tue, 24 Oct 2017 05:32:26 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.698 X-Spam-Level: X-Spam-Status: No, score=-2.698 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_LOW=-0.7, 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 2tsRkNXPQGKC; Tue, 24 Oct 2017 05:32:23 -0700 (PDT) Received: from mail-lf0-x230.google.com (mail-lf0-x230.google.com [IPv6:2a00:1450:4010:c07::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8366A13D179; Tue, 24 Oct 2017 05:32:23 -0700 (PDT) Received: by mail-lf0-x230.google.com with SMTP id g70so23801008lfl.3; Tue, 24 Oct 2017 05:32:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=Aer2g2osU/Jw4IrOWVqmMLtgsXx3+ctYK64jZF0M+aI=; b=DwA+q3Pq6zocLuk3f+KCgQ0dgntAO+Ek9490Z/fK0N1pHkyQ5EWId2cNNCXft7cpbF oMhASfGJQacth7RP3TqsgYV5zVYvQF77xcPoKpzQ7Oy8zzBgtlSyINaPRFeZcs61nNnM pqzgPjo4TUa0lQTatT7CKQHHfEsuiF7cksWWMi7LHZtChReKbzAThYvq7dUBWjrUQK7D YE4KIXo1pdX+BsRcHbEIrlF58UWWOuwuzoOdvZC46Edhm+ZcG4Z945LLjE1vYUHmL8Rr bkwMQUFJKMFqDJQxwC6Mnv0aBhaYmvuhZRzXAjrgCA+7z22geyC8uf1JwbnPxPRW0bUR fysw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=Aer2g2osU/Jw4IrOWVqmMLtgsXx3+ctYK64jZF0M+aI=; b=XiX4MfVjKmzDvDLTaWSFQ9HXWHDlwgMnrcH64kaAPf42mXC3h9Q9psOGHSipOC7ncl LN810wgikI4H7+mFWee1ba6qnVqf9Fu+6/O0SghETNoPBoIAqbQGkNZpQnWbfbEGzpLO ogY3iaBl2HpMdTmLQ6A/WVkNh6RIzWHmJRUcReLlO61eC1ueFNiUoyxPk+DOqWosCc+1 KZ5lqI9EIgbtykl/rDRiIazv002+Wmb3MrXm+hF2pCkhbt0SZPgPx46v3xThqgRkEd7c kBX/1FdrQyEFAAoua23PKnlPpT4R0BvQ32r9i74jF9PHsWvGe2xLfyS5rr1ZXaZe+zVM 9QLA== X-Gm-Message-State: AMCzsaWXgEyBvVPf6S7g/b+lU46vvZvNjoKwaCjp3FcNWQDAHgohlHy2 cWGJce85OTZ8BgPtq4Ws+Eweo/sSEAsmWzYCfbU= X-Google-Smtp-Source: ABhQp+SV8y6R8sGIdrtmojN4MGtk3idnw118Hjn0lcEHltDlTXb7hh6wfIZudSFjN/u8n2ePWAv6VR5vvc3PeHMN4z0= X-Received: by 10.25.145.80 with SMTP id y16mr5618136lfj.102.1508848341117; Tue, 24 Oct 2017 05:32:21 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.32.147 with HTTP; Tue, 24 Oct 2017 05:32:20 -0700 (PDT) In-Reply-To: <150880830851.25183.14035075986103732743.idtracker@ietfa.amsl.com> References: <150880830851.25183.14035075986103732743.idtracker@ietfa.amsl.com> From: Greg Mirsky Date: Tue, 24 Oct 2017 05:32:20 -0700 Message-ID: Subject: Fwd: New Version Notification for draft-mirsky-bfd-mpls-demand-02.txt To: "mpls@ietf.org" , "rtg-bfd@ietf.org" , spring@ietf.org Content-Type: multipart/alternative; boundary="94eb2c1cd2f2646f08055c4a21f2" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Oct 2017 12:32:27 -0000 --94eb2c1cd2f2646f08055c4a21f2 Content-Type: text/plain; charset="UTF-8" Dear All, new version of the draft includes more detailed specification of why the ingress LSR is to send BFD control packet to acknowledge failure notification from the egress over IP network and more detailed description of encapsulation of the BFD control packet in this case. Your comments, questions always welcome and greatly appreciated. Regards, Greg ---------- Forwarded message ---------- From: Date: Mon, Oct 23, 2017 at 6:25 PM Subject: New Version Notification for draft-mirsky-bfd-mpls-demand-02.txt To: Gregory Mirsky A new version of I-D, draft-mirsky-bfd-mpls-demand-02.txt has been successfully submitted by Greg Mirsky and posted to the IETF repository. Name: draft-mirsky-bfd-mpls-demand Revision: 02 Title: BFD in Demand Mode over Point-to-Point MPLS LSP Document date: 2017-10-23 Group: Individual Submission Pages: 5 URL: https://www.ietf.org/internet-drafts/draft-mirsky-bfd-mpls- demand-02.txt Status: https://datatracker.ietf.org/doc/draft-mirsky-bfd-mpls- demand/ Htmlized: https://tools.ietf.org/html/draft-mirsky-bfd-mpls-demand-02 Htmlized: https://datatracker.ietf.org/doc/html/draft-mirsky-bfd- mpls-demand-02 Diff: https://www.ietf.org/rfcdiff?url2=draft-mirsky-bfd-mpls- demand-02 Abstract: This document describes procedures for using Bidirectional Forwarding Detection (BFD) in Demand mode to detect data plane failures in Multiprotocol Label Switching (MPLS) point-to-point Label Switched Paths. 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 --94eb2c1cd2f2646f08055c4a21f2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
new version of the draft includes more detai= led specification of why the ingress LSR is to send BFD control packet to a= cknowledge failure notification from the egress over IP network and more de= tailed description of encapsulation of the BFD control packet in this case.=

Your comments, questions always welcome and great= ly appreciated.

Regards,
Greg
---------- Forwarded message ----------
Fro= m: <internet-drafts@ietf.org>
Dat= e: Mon, Oct 23, 2017 at 6:25 PM
Subject: New Version Notification for dr= aft-mirsky-bfd-mpls-demand-02.txt
To: Gregory Mirsky <gregimirsky@gmail.com>



A new version of I-D, draft-mirsky-bfd-mpls-demand-02.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-bfd-mpls-demand<= br> Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A002
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD in Demand Mode over Point-to-P= oint MPLS LSP
Document date:=C2=A0 2017-10-23
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 5
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/internet-drafts/draft-mirsky-bf= d-mpls-demand-02.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/draft-mirsky-bfd-mpls-demand/=
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https= ://tools.ietf.org/html/draft-mirsky-bfd-mpls-demand-02
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://datatracker.ietf.org/doc/html/draft-mirsky-bfd-mpls-= demand-02
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-mirsky-bfd-mpls= -demand-02

Abstract:
=C2=A0 =C2=A0This document describes procedures for using Bidirectional For= warding
=C2=A0 =C2=A0Detection (BFD) in Demand mode to detect data plane failures i= n
=C2=A0 =C2=A0Multiprotocol Label Switching (MPLS) point-to-point Label Swit= ched
=C2=A0 =C2=A0Paths.




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


--94eb2c1cd2f2646f08055c4a21f2-- From nobody Tue Oct 24 12:07:29 2017 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0F8091386F3; Tue, 24 Oct 2017 12:07:28 -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, FREEMAIL_FROM=0.001, 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 (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 9dCYTYloS1Rw; Tue, 24 Oct 2017 12:07:25 -0700 (PDT) Received: from mail-lf0-x231.google.com (mail-lf0-x231.google.com [IPv6:2a00:1450:4010:c07::231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 79285139567; Tue, 24 Oct 2017 12:07:25 -0700 (PDT) Received: by mail-lf0-x231.google.com with SMTP id a69so25201112lfe.5; Tue, 24 Oct 2017 12:07:25 -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=/OQFs5xPF472JhHimlbIQDQ5EbOYpFOpaE5DkS4PVOU=; b=sf9ZaS5/jH56B2aRTI/M6DE8f8/sfZ8FAnFH9GMJ7jXSdqGTZmYVW30kP5i1KntPC1 8nwMqBrXhP3uprWRNbkYIxjeOSfLwWEeard9zdk3W1xE8b49xo+l3fkdBN3MWzlW/9AQ ldJhCuclQq6PyCJR2V3aaLCklKC+9IhLG8wwmxGulmC1cjLn0SfOPV4uDnSnzLtdTB6K J6jBkvJ6qjLbOBpyncs2etbBGTBVy6lVZQ9o/oOuNyyX4WYwgtD95JGco+iH9A7IX8Wl 42b3QnKQwC5DcnZyeOh2V7F+dWsEsLPF4KB5y4kDt3PAs03Fnaa56g3dsDtDOhIdE9HX k8pQ== 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=/OQFs5xPF472JhHimlbIQDQ5EbOYpFOpaE5DkS4PVOU=; b=Z4ojzfqfj9aCFF8ab6B6eTXjQ4ElTWUH4dKzoBOSw1iAcKx66PHplYEARheNTzCLlu 7Q+MAEStGKPB5kZws/7zWDTku205rajnLQGlfWVSeBixSIzR9SmYA1h1fBoyj8/aBSdi 4m0jRI2EV3RKdvEsaJe/gTEXki9V/YP0JOPmKSmo6bBR+9JH4FdKflPX/v0/kkym8/mO epiCh/IhTIRhWLUH09AZueUUOwqX24K+v5d5vmwvFG9KEW/Iox/EdpjjPiyM+e69z8nk vhiw1/+NjmQ7zi8HUbtqQBG5gzjwEpBeuP+gsDwemu0CV+5XjAAel3h2cw5Bi2th8WeY HivQ== X-Gm-Message-State: AMCzsaV2Aw7aWyoIdEHlJjN0VS9WU6WlKB7ZPglRmF8qvkL05pdEvq7W MLxNHazc774tMPxzMM7U0S7KGG33CWSZJ/UVYwZvcw== X-Google-Smtp-Source: ABhQp+QXCciryMqwtbk1XI7+VSJnK0WxtCyijbCkK3UNKHbIGMCcA9HCQLxFzBBAjp9e5EPVqWxTAggNSXjyt4eMPbA= X-Received: by 10.25.92.16 with SMTP id q16mr6873638lfb.57.1508872043254; Tue, 24 Oct 2017 12:07:23 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.32.147 with HTTP; Tue, 24 Oct 2017 12:07:22 -0700 (PDT) From: Greg Mirsky Date: Tue, 24 Oct 2017 12:07:22 -0700 Message-ID: Subject: Updates to draft-mirsky-bfd* drafts. To: "mpls@ietf.org" , "rtg-bfd@ietf.org" , spring-chairs@ietf.org Content-Type: multipart/alternative; boundary="94eb2c0d8ea8265925055c4fa69d" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Oct 2017 19:07:28 -0000 --94eb2c0d8ea8265925055c4fa69d Content-Type: text/plain; charset="UTF-8" Dear All, updated versions of drafts first presented in Prague have been published: - BFD in Demand Mode over Point-to-Point MPLS LSP - Bidirectional Forwarding Detection (BFD) in Segment Routing Networks Using MPLS Dataplane - BFD for Multipoint Networks over Point-to-Multi-Point MPLS LSP Also new work Clarifying Use of LSP Ping to Bootstrap BFD over MPLS LSP has been published recently. Your comments, questions, suggestions always welcome and greatly appreciated. Looking forward to present them and discuss them in Singapore. Regards, Greg --94eb2c0d8ea8265925055c4fa69d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear All,
updated versions of drafts first presented i= n Prague have been published:
Also new work=C2=A0Clarifying Use of LSP Ping to Bootstrap BFD over MPLS LSP=C2=A0has be= en published recently.
Your comments, questions, suggestions always welcome an= d greatly appreciated. Looking forward to present them and discuss them in = Singapore.

Regards,
Greg
--94eb2c0d8ea8265925055c4fa69d-- From nobody Mon Oct 30 08:49:40 2017 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 1765B13FACC; Mon, 30 Oct 2017 08:49:36 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: rtg-bfd@ietf.org Subject: I-D Action: draft-ietf-bfd-yang-07.txt X-Test-IDTracker: no X-IETF-IDTracker: 6.63.2 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <150937857605.7831.3010588755628217984@ietfa.amsl.com> Date: Mon, 30 Oct 2017 08:49:36 -0700 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.22 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Oct 2017 15:49:36 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Bidirectional Forwarding Detection WG of the IETF. Title : YANG Data Model for Bidirectional Forwarding Detection (BFD) Authors : Reshad Rahman Lianshu Zheng Mahesh Jethanandani Santosh Pallagatti Greg Mirsky Filename : draft-ietf-bfd-yang-07.txt Pages : 62 Date : 2017-10-30 Abstract: This document defines a YANG data model that can be used to configure and manage Bidirectional Forwarding Detection (BFD). The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-yang/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-bfd-yang-07 https://datatracker.ietf.org/doc/html/draft-ietf-bfd-yang-07 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-yang-07 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/