From nobody Wed Jan 2 12:06:33 2019 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 E08281271FF for ; Wed, 2 Jan 2019 12:06:31 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ItiExk3ZRg0z for ; Wed, 2 Jan 2019 12:06:30 -0800 (PST) Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 11BB5129AB8 for ; Wed, 2 Jan 2019 12:06:30 -0800 (PST) Received: from dresden.attlocal.net (99-59-193-67.lightspeed.livnmi.sbcglobal.net [99.59.193.67]) by slice.pfrc.org (Postfix) with ESMTPSA id 9A5E71E27A; Wed, 2 Jan 2019 15:05:33 -0500 (EST) Content-Type: multipart/alternative; boundary="Apple-Mail=_284E579F-2E87-4B84-884F-65D6E3EA85D7" Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: Re: https://mailarchive.ietf.org/arch/msg/rtg-bfd/3MIOqwHTMMkW59IbRFnJR5an4LI From: Jeffrey Haas In-Reply-To: Date: Wed, 2 Jan 2019 15:06:26 -0500 Message-Id: <782FA759-B82B-43F7-9700-19BBDB72496D@pfrc.org> References: To: "rtg-bfd@ietf. org" , Sudar X-Mailer: Apple Mail (2.3445.102.3) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 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, 02 Jan 2019 20:06:32 -0000 --Apple-Mail=_284E579F-2E87-4B84-884F-65D6E3EA85D7 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Note that this was related to the last IPR attestation for = draft-ietf-bfd-vxlan. Thank you, Sudarsan. -- Jeff > On Jan 2, 2019, at 1:51 PM, Sudar wrote: >=20 > Hi all,=20 >=20 > There is no more IPR to be disclosed from my side. Please send this = off to IESG.=20 > = https://mailarchive.ietf.org/arch/msg/rtg-bfd/3MIOqwHTMMkW59IbRFnJR5an4LI = >=20 >=20 > --=20 > Regards, > Sudarsan Paragiri Mohan --Apple-Mail=_284E579F-2E87-4B84-884F-65D6E3EA85D7 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Note = that this was related to the last IPR attestation for = draft-ietf-bfd-vxlan.

Thank you, Sudarsan.

-- Jeff


On Jan 2, 2019, at 1:51 PM, Sudar <sudarsan.225@gmail.com> wrote:

Hi all, 

There is no more IPR to be disclosed = from my side. Please send this off to IESG. 
https://mailarchive.ietf.org/arch/msg/rtg-bfd/3MIOqwHTMMkW59IbR= FnJR5an4LI


--
Regards,
Sudarsan Paragiri = Mohan

= --Apple-Mail=_284E579F-2E87-4B84-884F-65D6E3EA85D7-- From nobody Wed Jan 2 12:09:31 2019 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 77418130F11; Wed, 2 Jan 2019 12:09:29 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Jeffrey Haas To: Subject: Publication has been requested for draft-ietf-bfd-vxlan-06 X-Test-IDTracker: no X-IETF-IDTracker: 6.89.2 Auto-Submitted: auto-generated Precedence: bulk Cc: jhaas@pfrc.org, rtg-bfd@ietf.org, Jeffrey Haas , iesg-secretary@ietf.org, bfd-chairs@ietf.org Message-ID: <154645976948.32641.12009476583673399299.idtracker@ietfa.amsl.com> Date: Wed, 02 Jan 2019 12:09:29 -0800 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Jan 2019 20:09:30 -0000 Jeffrey Haas has requested publication of draft-ietf-bfd-vxlan-06 as Proposed Standard on behalf of the BFD working group. Please verify the document's state at https://datatracker.ietf.org/doc/draft-ietf-bfd-vxlan/ From nobody Thu Jan 17 01:16:21 2019 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 AC6E812F1AC for ; Thu, 17 Jan 2019 01:16:19 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.999 X-Spam-Level: X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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 lAGqdh0EGCzH for ; Thu, 17 Jan 2019 01:16:18 -0800 (PST) Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0840D126DBF for ; Thu, 17 Jan 2019 01:16:18 -0800 (PST) Received: by mail-lf1-x12e.google.com with SMTP id y14so7173523lfg.13 for ; Thu, 17 Jan 2019 01:16:17 -0800 (PST) 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=Rc3ItGlAdq60NFlCtTLgbHiyZlqEMIxXIQaJsid6DmI=; b=I0ZRi5gc00We/0bIMbUSoOBX3mdstNGeDADeG50gtSkn1HdmrRXKBE838VyazjB3sY zbrQFIZj444YuKq9oZxONKeWDvo7FkWUsw8Lioi8NEh+IEi1C1ZtqBwGYcsGN/W6AyFn f/Yd/LkYm7UyKQ97QZzzxLGCp18IH41aYjy0eg9b8em6qxOCv6qOlJCxqHhcdf5gi1fa pBQCPSOFmh7ZGJ1XPXfecOf0+meBz7O2nGY+um+JFnF5yb5POpHctaqyjQDdFztolUL2 kyyFs7hLDnFZYyZZahbm1EIaDdrL/EmBIPXJBMDZZmdIiDPoQ9vQdeO561Dx7T/S2PlV DefQ== 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=Rc3ItGlAdq60NFlCtTLgbHiyZlqEMIxXIQaJsid6DmI=; b=L7wQsE4bbHNlMqkFoHO9Z/Yxg7rDQrpo7afcBYCzZtg7oLPTn5HUG4r6vDgTkJkFUy BlAUhcLdJiDBiFdpUNLtcE4JkD3OVujQaoHaDKexAHgjWphik3V/y3+tK58M0KQWwHGX hlbDAI+QT6oMOZJ7JToEWOh5fjS1oo5sSPIhvduYxGbIzAJgwWukKzQePVGWwTW7creq nbcQdeDBBlCd4zDQY8sxwGeOwvpeu19vtsEw0hbjZYqgkY8ONBCtKN+8zHYAUbQrsoxA qvW9kk33CDivrBwbXV1HXngmAv8iOKgYFeGkJU/h3dHJ7HSFx4K6oxkOMHrjMSo9vLMA adYQ== X-Gm-Message-State: AJcUukdFpfOiP29sjUDdznlPjL1KTbOE0AukFQjQsRZTYjfapQn+NkDx LMSy74RN7STfMBsjqUpeUMdzsWT8jAMNpRkeNxfMXjsT X-Google-Smtp-Source: ALg8bN6xLsxCc0gPoJQf1T1mjiATM1LsJPSz0WNfSxaRI8IQKhQitKEbIKplNDMfrDNnJi2Cy5FPK5APjM+wgJEy2us= X-Received: by 2002:a19:1994:: with SMTP id 142mr10032275lfz.134.1547716575892; Thu, 17 Jan 2019 01:16:15 -0800 (PST) MIME-Version: 1.0 From: Muthu Arul Mozhi Perumal Date: Thu, 17 Jan 2019 14:46:04 +0530 Message-ID: Subject: Can Multihop BFD be protected using RLFA backup? To: rtg-bfd@ietf.org Content-Type: multipart/alternative; boundary="000000000000b81a41057fa3d8d7" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2019 09:16:20 -0000 --000000000000b81a41057fa3d8d7 Content-Type: text/plain; charset="UTF-8" Hi All, Multihop BFD (RFC 5883) packets are sent over UDP/IP. The encapsulation used is identical to single hop BFD (RFC 5881) except that the UDP destination port is set to 4784. Now, suppose on the ingress node there is no IP/LFA backup path for the destination address tracked by multihop BFD, but there exists an an RLFA backup path to that destination. In this case, is multihop BFD expected to be protected using the RLFA backup path i.e should multihop BFD packets be sent over the RLFA backup path if the primary path goes down? If multihop BFD packets are to be sent over the RLFA backup path, what encapsulation should the ingress use? The encapsulation specified in RFC 5883 or the encapsulation specified in RFC 5884 (MPLS BFD)? Please let me know you opinion. Regards, Muthu --000000000000b81a41057fa3d8d7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi All,

Multihop BFD (RFC 5883) packets are sent over UDP/IP. The en= capsulation used is identical to single hop BFD (RFC 5881) except that the = UDP destination port is set to 4784.

Now, suppose on the ingress node there is no IP/LFA backup p= ath for the destination address tracked by multihop BFD, but there exists a= n an RLFA backup path to that destination. In this case, is multihop BFD ex= pected to be protected using the RLFA backup path i.e should multihop BFD p= ackets be sent over the RLFA backup path if the primary path goes down?

If multihop BFD packets a= re to be sent over the RLFA backup path, what encapsulation should the ingr= ess use? The encapsulation specified in RFC 5883 or the encapsulation speci= fied in RFC 5884 (MPLS BFD)?

Please let me=C2=A0know you opinion.

<= /div>
Regards,
Muthu
<= /div>
--000000000000b81a41057fa3d8d7-- From nobody Thu Jan 17 01:57:20 2019 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 CAEF1130F4A for ; Thu, 17 Jan 2019 01:57:18 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uZjGdRL9dbRB for ; Thu, 17 Jan 2019 01:57:16 -0800 (PST) Received: from orange.com (mta135.mail.business.static.orange.com [80.12.70.35]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 35742130F30 for ; Thu, 17 Jan 2019 01:57:16 -0800 (PST) Received: from opfednr02.francetelecom.fr (unknown [xx.xx.xx.66]) by opfednr25.francetelecom.fr (ESMTP service) with ESMTP id 43gKHZ55zSzCrCY; Thu, 17 Jan 2019 10:57:14 +0100 (CET) Received: from Exchangemail-eme2.itn.ftgroup (unknown [xx.xx.31.42]) by opfednr02.francetelecom.fr (ESMTP service) with ESMTP id 43gKHZ42bfz8sYR; Thu, 17 Jan 2019 10:57:14 +0100 (CET) Received: from OPEXCLILMA4.corporate.adroot.infra.ftgroup ([fe80::65de:2f08:41e6:ebbe]) by OPEXCLILM41.corporate.adroot.infra.ftgroup ([fe80::c845:f762:8997:ec86%19]) with mapi id 14.03.0415.000; Thu, 17 Jan 2019 10:57:14 +0100 From: To: Muthu Arul Mozhi Perumal , "rtg-bfd@ietf.org" Subject: RE: Can Multihop BFD be protected using RLFA backup? Thread-Topic: Can Multihop BFD be protected using RLFA backup? Thread-Index: AQHUrkVUEHIodsCu2E63t3a7nbVDx6WzN9nw Date: Thu, 17 Jan 2019 09:57:13 +0000 Message-ID: <25009_1547719034_5C40517A_25009_420_1_9E32478DFA9976438E7A22F69B08FF924B78E8A2@OPEXCLILMA4.corporate.adroot.infra.ftgroup> References: In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.168.234.6] Content-Type: multipart/alternative; boundary="_000_9E32478DFA9976438E7A22F69B08FF924B78E8A2OPEXCLILMA4corp_" MIME-Version: 1.0 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2019 09:57:19 -0000 --_000_9E32478DFA9976438E7A22F69B08FF924B78E8A2OPEXCLILMA4corp_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGksDQoNCkkgdGhpbmsgdGhhdCB0aGUgZmFjdCB0aGF0IOKAnGNvbnRyb2zigJ0gcGFja2V0cyBj 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bh=w8jQMfzztMN8ieTNew2RYQBx31G2eVSZThtO6OHJMq4=; b=guu1GysQV7EyfFUgBGVy8XhCLh2snae96FSyZnh31TGGcI+zLV0U9JGNlSDpYA1OC0 dQLJvzE7y4t5lc7jFAafPJfxrxou1iHV2KabLdjgn5fiHmaGpK7k/vMK3cQPiNi3cnnA BdQYUIdJdVpB12OS4LlzWzVHILlk1MUBDB057+gTT4wzUSt1s6SjvlLz1DJgLErCMS+V d651R4yh4xs2BV+MFIxxNJ4EJAVqRR0G/QqtVEIV+N1Deb3eeFw4pcXtjVxwgqumgxIh iQsHHogw53EcLGu1XqO4pFIMmzZiK5DulPvj3U95Rirlvr4p9g1wub1sd1md8ylQes0m 5t6g== X-Gm-Message-State: AJcUukftbZQPYw55V1kkrvbu995hlsp37CLbO8GANbUJlwRLGOtD7ocS T/smnOKnNCk3vpEChYQYpnsuPf/amrxTnd9a/t+FwHEd X-Google-Smtp-Source: ALg8bN7fJv3fZJ5oX1xtI/6jOsMKdQSVMusD+u6l9f+uSdjd8/dRdVtjTuHUSdEkXxegf0bXCxQy80wXtCNVSyTKmXo= X-Received: by 2002:a19:d619:: with SMTP id n25mr9586781lfg.91.1547722953220; Thu, 17 Jan 2019 03:02:33 -0800 (PST) MIME-Version: 1.0 References: <25009_1547719034_5C40517A_25009_420_1_9E32478DFA9976438E7A22F69B08FF924B78E8A2@OPEXCLILMA4.corporate.adroot.infra.ftgroup> In-Reply-To: <25009_1547719034_5C40517A_25009_420_1_9E32478DFA9976438E7A22F69B08FF924B78E8A2@OPEXCLILMA4.corporate.adroot.infra.ftgroup> From: Muthu Arul Mozhi Perumal Date: Thu, 17 Jan 2019 16:32:21 +0530 Message-ID: Subject: Re: Can Multihop BFD be protected using RLFA backup? To: stephane.litkowski@orange.com Cc: "rtg-bfd@ietf.org" Content-Type: multipart/alternative; boundary="000000000000d66e17057fa554e1" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2019 11:02:38 -0000 --000000000000d66e17057fa554e1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Stephane, Thanks for your response. Please see inline.. On Thu, Jan 17, 2019 at 3:27 PM wrote: > Hi, > > > > I think that the fact that =E2=80=9Ccontrol=E2=80=9D packets can benefit = of FRR is really > implementation dependent. It is also linked to the place where BFD packet= s > are created (RP or LC). > > From a theoretical point of view, nothing prevents FRR to be used as for > any packet generated by the router itself. > Do we know of any implementation that provides RLFA FRR protection to multihop BFD packets? > Regarding the encapsulation, if your BFD client is using RFC5883, this > will not change during FRR, the FRR will just push labels on top > independently. > The primary reason for my question on encapsulations is because RFC 4379 has the foll. as one of the reasons for using the destination address in 127/8 range for IPv4 (0:0:0:0:0:FFFF:7F00/104 range for IPv6) for diagnostic packets sent over MPLS LSP: 1. Although the LSP in question may be broken in unknown ways, the likelihood of a diagnostic packet being delivered to a user of an MPLS service MUST be held to an absolute minimum. Since multihop BFD uses a routable destination address, wondering whether there would be any issues if multihop BFD packets are sent over the RLFA backup path without following RFC 5884 encapsulation.. Regards, Muthu > > > Again, the possibility to get FRR is really implementation dependent, as > the forwarding decision of the BFD packet may not be taken by the network > processor of the LC. > > > > Brgds, > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] *On Behalf Of *Muthu > Arul Mozhi Perumal > *Sent:* Thursday, January 17, 2019 10:16 > *To:* rtg-bfd@ietf.org > *Subject:* Can Multihop BFD be protected using RLFA backup? > > > > Hi All, > > > > Multihop BFD (RFC 5883) packets are sent over UDP/IP. The encapsulation > used is identical to single hop BFD (RFC 5881) except that the UDP > destination port is set to 4784. > > > > Now, suppose on the ingress node there is no IP/LFA backup path for the > destination address tracked by multihop BFD, but there exists an an RLFA > backup path to that destination. In this case, is multihop BFD expected t= o > be protected using the RLFA backup path i.e should multihop BFD packets b= e > sent over the RLFA backup path if the primary path goes down? > > > > If multihop BFD packets are to be sent over the RLFA backup path, what > encapsulation should the ingress use? The encapsulation specified in RFC > 5883 or the encapsulation specified in RFC 5884 (MPLS BFD)? > > > > Please let me know you opinion. > > > > Regards, > > Muthu > > _________________________________________________________________________= ________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confid= entielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez re= cu ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages = electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme o= u falsifie. Merci. > > This message and its attachments may contain confidential or privileged i= nformation that may be protected by law; > they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and de= lete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have bee= n modified, changed or falsified. > Thank you. > > --000000000000d66e17057fa554e1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Stephane,=

Thanks for your respo= nse. Please see inline..

On Thu, Jan 17, 2019 at 3:27 PM <stephane.litkowski@orange.com= > wrote:

Hi,

=C2=A0

I think that the fact that =E2=80=9Ccontrol= =E2=80=9D packets can benefit of FRR is really implementation dependent. It= is also linked to the place where BFD packets are created (RP or LC).

From a theoretical point of view, nothing pr= events FRR to be used as for any packet generated by the router itself.


Do w= e know of any implementation that provides RLFA FRR protection to multihop = BFD packets?
=C2=A0

Regarding the encapsulation, if your BFD cli= ent is using RFC5883, this will not change during FRR, the FRR will just pu= sh labels on top independently.

The primary reason for my question on encaps= ulations is because RFC 4379 has the foll. as one of the reasons for using = the destination address in=C2=A0127/8 range for IPv4 (0:0:0:0:0:FFFF:7F00/1= 04 range for IPv6) for diagnostic packets sent over MPLS LSP:=C2=A0
=C2=A0 =C2=A01. Although the LSP in question may = be broken in unknown ways, the
=C2=A0 =C2=A0 =C2=A0 likelihood of a= diagnostic packet being delivered to a user of an
= =C2=A0 =C2=A0 =C2=A0 MPLS service MUST be held to an absolute minimum.
Since multihop BFD uses a routable desti= nation address, wondering whether there would be any issues if multihop BFD= packets are sent over the RLFA backup path without following RFC 5884 enca= psulation..

Regards,
Muthu

=C2=A0

Again, the possibility to get FRR is really = implementation dependent, as the forwarding decision of the BFD packet may = not be taken by the network processor of the LC.

=C2=A0

Brgds,

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Muthu Arul Mozhi Perumal
Sent: Thursday, January 17, 2019 10:16
To: rtg-bfd@ie= tf.org
Subject: Can Multihop BFD be protected using RLFA backup?<= /u>

=C2=A0

Hi All,=

= =C2=A0

Multiho= p BFD (RFC 5883) packets are sent over UDP/IP. The encapsulation used is id= entical to single hop BFD (RFC 5881) except that the UDP destination port i= s set to 4784.

= =C2=A0

Now, su= ppose on the ingress node there is no IP/LFA backup path for the destinatio= n address tracked by multihop BFD, but there exists an an RLFA backup path = to that destination. In this case, is multihop BFD expected to be protected using the RLFA backup path i.e sh= ould multihop BFD packets be sent over the RLFA backup path if the primary = path goes down?

= =C2=A0

If mult= ihop BFD packets are to be sent over the RLFA backup path, what encapsulati= on should the ingress use? The encapsulation specified in RFC 5883 or the e= ncapsulation specified in RFC 5884 (MPLS BFD)?

= =C2=A0

Please = let me=C2=A0know you opinion.

= =C2=A0

Regards= ,

Muthu

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Thread-Topic: Can Multihop BFD be protected using RLFA backup? 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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 TaT-fiwjZ793 for ; Thu, 17 Jan 2019 09:31:17 -0800 (PST) Received: from mail-qt1-x833.google.com (mail-qt1-x833.google.com [IPv6:2607:f8b0:4864:20::833]) (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 829E0130EC3 for ; Thu, 17 Jan 2019 09:31:17 -0800 (PST) Received: by mail-qt1-x833.google.com with SMTP id t33so12184696qtt.4 for ; Thu, 17 Jan 2019 09:31:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version; bh=1/qnCIcClxzGMVN6g+xygLF+tZO0OjHvzuUcU7UIiRM=; b=vNf0oNJKPs7t6DKpliTUfUqcszrQk/tlEY6LST3IX+xw2YM68pwItgdOg5S/4VUnHk 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ALg8bN7ps4PmOy+JGbNNrzcZSL46KhVpx0WbPEVbJw9iF82C7C+8ouW1qcKc7y0nORRlPyYg+tCgdw== X-Received: by 2002:ad4:410c:: with SMTP id i12mr12105186qvp.219.1547746276463; Thu, 17 Jan 2019 09:31:16 -0800 (PST) Received: from [192.168.0.128] ([50.234.116.4]) by smtp.gmail.com with ESMTPSA id o25sm60078986qtj.10.2019.01.17.09.31.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 17 Jan 2019 09:31:15 -0800 (PST) Date: Thu, 17 Jan 2019 09:31:07 -0800 From: Jeff Tantsura To: Muthu Arul Mozhi Perumal , Alexander Vainshtein Cc: "=?utf-8?Q?rtg-bfd=40ietf.org?=" Message-ID: In-Reply-To: References: <25009_1547719034_5C40517A_25009_420_1_9E32478DFA9976438E7A22F69B08FF924B78E8A2@OPEXCLILMA4.corporate.adroot.infra.ftgroup> Subject: RE: Can Multihop BFD be protected using RLFA backup? X-Readdle-Message-ID: d508a3bd-970e-4669-bfc5-ff2a4167841f@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="5c40bbe0_50801ee1_116" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2019 17:31:22 -0000 --5c40bbe0_50801ee1_116 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Muthu, Multihop B=46D provides liveness monitoring of a remote end point while L= =46A/rL=46A provides protection of a local resource. Theory: If Multihop B=46D packets happen to exit the system over an interface tha= t is protected by L=46A/rL=46A, when that interface fails, they should be= transparently sent over the protecting path Practice: Depending on implementation (as Stephane said) locally generated traffic = (which B=46D is) could be injected into fast path at different stages and= could be the case that the injection point for bfd is done too late to g= et it into protecting path. In general - =E2=80=9Cslow B=46D=E2=80=9D (RP= generated) would follow the transit traffic path, ASIC/NPU generated B=46= D - really depends. Cheers, Jeff On Jan 17, 2019, 4:55 AM -0800, Alexander Vainshtein , wrote: > Muthu, and all, > A minor correction: s/iBGP peers/remote BGP Next Hops/ in my previous e= mail. > > Regards, > Sasha > > Office: +972-39266302 > Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549266302 > Email:=C2=A0=C2=A0 Alexander.Vainshtein=40ecitele.com > > =46rom: Alexander Vainshtein > Sent: Thursday, January 17, 2019 2:20 PM > To: 'Muthu Arul Mozhi Perumal' > Cc: rtg-bfd=40ietf.org; stephane.litkowski=40orange.com > Subject: RE: Can Multihop B=46D be protected using RL=46A backup=3F > > Muthu, > Regarding the question in your 2nd email =E2=80=9CDo we know of any imp= lementation that provides RL=46A =46RR protection to multihop B=46D packe= ts=3F=E2=80=9D > My employer (ECI Telecom) has implemented multi-hop IP B=46D protected = by IP =46RR (including local and remote L=46A) with encapsulation that fo= llows R=46C 5883. > (As explained by Stephane, IP =46RR does not differentiate between mult= i-hop IP B=46D and any other native IP traffic to the protected destinati= on). > Multi-hop IP B=46D is used for reliable and reasonably fast detection o= f failure of iBGP peers that, in its turn, =C2=A0can trigger appropriate = protection mechanisms. > > Regards, > Sasha > > Office: +972-39266302 > Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +972-549266302 > Email:=C2=A0=C2=A0 Alexander.Vainshtein=40ecitele.com > > =46rom: Rtg-bfd On Behalf Of Muthu Arul Mo= zhi Perumal > Sent: Thursday, January 17, 2019 1:02 PM > To: stephane.litkowski=40orange.com > Cc: rtg-bfd=40ietf.org > Subject: Re: Can Multihop B=46D be protected using RL=46A backup=3F > > Hi Stephane, > > Thanks for your response. Please see inline.. > > On Thu, Jan 17, 2019 at 3:27 PM wrote= : > > Hi, > > > > I think that the fact that =E2=80=9Ccontrol=E2=80=9D packets can bene= fit of =46RR is really implementation dependent. It is also linked to the= place where B=46D packets are created (RP or LC). > > =46rom a theoretical point of view, nothing prevents =46RR to be used= as for any packet generated by the router itself. > > Do we know of any implementation that provides RL=46A =46RR protection = to multihop B=46D packets=3F > > > Regarding the encapsulation, if your B=46D client is using R=46C5883,= this will not change during =46RR, the =46RR will just push labels on to= p independently. > > The primary reason for my question on encapsulations is because R=46C 4= 379 has the foll. as one of the reasons for using the destination address= in=C2=A0127/8 range for IPv4 (0:0:0:0:0:=46=46=46=46:7=4600/104 range fo= r IPv6) for diagnostic packets sent over MPLS LSP: > =C2=A0 =C2=A01. Although the LSP in question may be broken in unknown w= ays, the > =C2=A0 =C2=A0 =C2=A0 likelihood of a diagnostic packet being delivered = to a user of an > =C2=A0 =C2=A0 =C2=A0 MPLS service MUST be held to an absolute minimum. > > Since multihop B=46D uses a routable destination address, wondering whe= ther there would be any issues if multihop B=46D packets are sent over th= e RL=46A backup path without following R=46C 5884 encapsulation.. > > Regards, > Muthu > > > > Again, the possibility to get =46RR is really implementation dependen= t, as the forwarding decision of the B=46D packet may not be taken by the= network processor of the LC. > > > > Brgds, > > > > =46rom: Rtg-bfd =5Bmailto:rtg-bfd-bounces=40ietf.org=5D On Behalf Of = Muthu Arul Mozhi Perumal > > Sent: Thursday, January 17, 2019 10:16 > > To: rtg-bfd=40ietf.org > > Subject: Can Multihop B=46D be protected using RL=46A backup=3F > > > > Hi All, > > > > Multihop B=46D (R=46C 5883) packets are sent over UDP/IP. The encapsu= lation used is identical to single hop B=46D (R=46C 5881) except that the= UDP destination port is set to 4784. > > > > Now, suppose on the ingress node there is no IP/L=46A backup path for= the destination address tracked by multihop B=46D, but there exists an a= n RL=46A backup path to that destination. In this case, is multihop B=46D= expected to be protected using the RL=46A backup path i.e should multiho= p B=46D packets be sent over the RL=46A backup path if the primary path g= oes down=3F > > > > If multihop B=46D packets are to be sent over the RL=46A backup path,= what encapsulation should the ingress use=3F The encapsulation specified= in R=46C 5883 or the encapsulation specified in R=46C 5884 (MPLS B=46D)=3F= > > > > Please let me=C2=A0know you opinion. > > > > Regards, > > Muthu > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F > > Ce message et ses pieces jointes peuvent contenir des informations co= nfidentielles ou privilegiees et ne doivent donc > > pas etre diffuses, exploites ou copies sans autorisation. Si vous ave= z recu ce message par erreur, veuillez le signaler > > a l'expediteur et le detruire ainsi que les pieces jointes. Les messa= ges electroniques etant susceptibles d'alteration, > > Orange decline toute responsabilite si ce message a ete altere, defor= me ou falsifie. Merci. > > This message and its attachments may contain confidential or privileg= ed information that may be protected by law; > > they should not be distributed, used or copied without authorisation.= > > If you have received this email in error, please notify the sender an= d delete this message and its attachments. > > As emails may be altered, Orange is not liable for messages that have= been modified, changed or falsified. > > Thank you. > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F > > This e-mail message is intended for the recipient only and contains inf= ormation which is > CON=46IDENTIAL and which may be proprietary to ECI Telecom. If you have= received this > transmission in error, please inform us by e-mail, phone or fax, and th= en delete the original > and all copies thereof. > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F --5c40bbe0_50801ee1_116 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Muthu,

Multihop B=46D provides liveness monitoring of a remote end point wh= ile L=46A/rL=46A provides protection of a local resource.
Theory:
If Multihop B=46D packets happen to exit the system over an interfac= e that is protected by L=46A/rL=46A, when that interface fails, they shou= ld be transparently sent over the protecting path
Practice:
Depending on implementation (as Stephane said) locally generated tra= ffic (which B=46D is) could be injected into fast path at different stage= s and could be the case that the injection point for bfd is done too late= to get it into protecting path. In general - =E2=80=9Cslow B=46D=E2=80=9D= (RP generated) would follow the transit traffic path, ASIC/NPU generated= B=46D - really depends.

Cheers,
Jeff
On Jan 17, 2019= , 4:55 AM -0800, Alexander Vainshtein <Alexander.Vainshtein=40ecitele.= com>, wrote:

Muthu, and all,

A minor correction: s= /iBGP peers/remote BGP Next Hops/ in my previous email.

&=23160;

Regards,

Sasha

&=23160;

Office: +972-39266302=

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

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

&=23160;

=46rom: Alexander = Vainshtein
Sent: Thursday, January 17, 2019 2:20 PM
To: 'Muthu Arul Mozhi Perumal' <muthu.arul=40gmail.com>
Cc: rtg-bfd=40ietf.org; stephane.litkowski=40orange.com
Subject: RE: Can Multihop B=46D be protected using RL=46A backup=3F=

&=23160;

Muthu,

Regarding the question in your 2n= d email =E2=80=9CDo we know of any implementation that provides RL=46A =46= RR protection to multihop B=46D packets=3F=E2=80=9D=

My employer (ECI Telecom) has implemen= ted multi-hop IP B=46D protected by IP =46RR (including local and remote = L=46A) with encapsulation that follows R=46C 5883.

(As explained by Stephane, IP =46RR do= es not differentiate between multi-hop IP B=46D and any other native IP t= raffic to the protected destination).

Multi-hop IP B=46D is used for reliabl= e and reasonably fast detection of failure of iBGP peers that, in its tur= n, &=23160;can trigger appropriate protection mechanisms.

&=23160;

Regards,

Sasha

&=23160;

Office: +972-39266302=

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

Email:&=23160;&=23160= ; Alexander.Vai= nshtein=40ecitele.com

&=23160;

=46rom: Rtg-bfd &l= t;rtg-bfd-bounces=40iet= f.org> On Behalf Of Muthu Arul Mozhi Perumal
Sent: Thursday, January 17, 2019 1:02 PM
To: stephan= e.litkowski=40orange.com
Cc: rtg-bfd=40ietf.org
Subject: Re: Can Multihop B=46D be protected using RL=46A backup=3F=

&=23160;

Hi Stephane,

&=23160;

Thanks for your response. Please see inline..

&=23160;

Hi,

&=23160;

I think that the fact that =E2= =80=9Ccontrol=E2=80=9D packets can benefit of =46RR is really implementat= ion dependent. It is also linked to the place where B=46D packets are cre= ated (RP or LC).

=46rom a theoretical point of= view, nothing prevents =46RR to be used as for any packet generated by t= he router itself.

&=23160;

Do we know of any implementation that provides RL=46A =46R= R protection to multihop B=46D packets=3F

&=23160;

Regarding the encapsulation, = if your B=46D client is using R=46C5883, this will not change during =46R= R, the =46RR will just push labels on top independently.

&=23160;

The primary reason for my question on encapsulations is be= cause R=46C 4379 has the foll. as one of the reasons for using the destin= ation address in&=23160;127/8 range for IPv4 (0:0:0:0:0:=46=46=46=46:7=46= 00/104 range for IPv6) for diagnostic packets sent over MPLS LSP:&=23160;=

&=23160; &=23160;1. Although the LSP in question may be br= oken in unknown ways, the

&=23160; &=23160; &=23160; likelihood of a diagnostic pack= et being delivered to a user of an

&=23160; &=23160; &=23160; MPLS service MUST be held to an= absolute minimum.

&=23160;

Since multihop B=46D uses a routable destination address, = wondering whether there would be any issues if multihop B=46D packets are= sent over the RL=46A backup path without following R=46C 5884 encapsulat= ion..

&=23160;

Regards,

Muthu

&=23160;

Again, the possibility to get= =46RR is really implementation dependent, as the forwarding decision of = the B=46D packet may not be taken by the network processor of the LC.

&=23160;

Brgds,

&=23160;

=46rom: Rtg-bfd =5Bmailto:r= tg-bfd-bounces=40ietf.org=5D On Behalf Of Muthu Arul Mozhi Per= umal
Sent: Thursday, January 17, 2019 10:16
To: rtg-bfd=40ietf.org
Subject: Can Multihop B=46D be protected using RL=46A backup=3F

&=23160;

Hi All,

&=23160;

Multihop B=46D (R=46C 5883) packets are sent over UDP/IP. The enca= psulation used is identical to single hop B=46D (R=46C 5881) except that = the UDP destination port is set to 4784.

&=23160;

Now, suppose on the ingress node there is no IP/L=46A backup path = for the destination address tracked by multihop B=46D, but there exists a= n an RL=46A backup path to that destination. In this case, is multihop B=46= D expected to be protected using the RL=46A backup path i.e should multih= op B=46D packets be sent over the RL=46A backup path if the primary path = goes down=3F

&=23160;

If multihop B=46D packets are to be sent over the RL=46A backup pa= th, what encapsulation should the ingress use=3F The encapsulation specif= ied in R=46C 5883 or the encapsulation specified in R=46C 5884 (MPLS B=46= D)=3F

&=23160;

Please let me&=23160;know you opinion.

&=23160;

Regards,

Muthu

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

 


Ce message et ses pieces jointes peuvent contenir des informations c=
onfidentielles ou privilegiees et ne doivent donc


pas etre diffuses, exploites ou copies sans autorisation. Si vous av=
ez recu ce message par erreur, veuillez le signaler


a l'expediteur et le detruire ainsi que les pieces jointes. Les mess=
ages electroniques etant susceptibles d'alteration,


Orange decline toute responsabilite si ce message a ete altere, defo=
rme ou falsifie. Merci.


 


This message and its attachments may contain confidential or privile=
ged information that may be protected by law;


they should not be distributed, used or copied without authorisation=
.


If you have received this email in error, please notify the sender a=
nd delete this message and its attachments.


As emails may be altered, Orange is not liable for messages that hav=
e been modified, changed or falsified.


Thank you.

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

This e-mail message is intended for the recipient only and contains infor= mation which is
CON=46IDENTIAL and which may be proprietary to ECI Telecom. If you have r= eceived this
transmission in error, please inform us by e-mail, phone or fax, and then= delete the original
and all copies thereof.
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
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Thread-Topic: Can Multihop BFD be protected using RLFA backup? 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(ESMTP service) with ESMTP id 43gv7P561Kz1xp9; Fri, 18 Jan 2019 09:22:09 +0100 (CET) Received: from OPEXCLILMA4.corporate.adroot.infra.ftgroup ([fe80::65de:2f08:41e6:ebbe]) by OPEXCLILM7C.corporate.adroot.infra.ftgroup ([fe80::8007:17b:c3b4:d68b%19]) with mapi id 14.03.0415.000; Fri, 18 Jan 2019 09:22:09 +0100 From: To: Muthu Arul Mozhi Perumal CC: "rtg-bfd@ietf.org" Subject: RE: Can Multihop BFD be protected using RLFA backup? Thread-Topic: Can Multihop BFD be protected using RLFA backup? Thread-Index: AQHUrkVUEHIodsCu2E63t3a7nbVDx6WzN9nwgAADFYCAAXVNoA== Date: Fri, 18 Jan 2019 08:22:09 +0000 Message-ID: <14028_1547799729_5C418CB1_14028_406_7_9E32478DFA9976438E7A22F69B08FF924B78FD44@OPEXCLILMA4.corporate.adroot.infra.ftgroup> References: <25009_1547719034_5C40517A_25009_420_1_9E32478DFA9976438E7A22F69B08FF924B78E8A2@OPEXCLILMA4.corporate.adroot.infra.ftgroup> In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.168.234.4] Content-Type: multipart/alternative; boundary="_000_9E32478DFA9976438E7A22F69B08FF924B78FD44OPEXCLILMA4corp_" MIME-Version: 1.0 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 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, 18 Jan 2019 08:22:14 -0000 --_000_9E32478DFA9976438E7A22F69B08FF924B78FD44OPEXCLILMA4corp_ Content-Type: 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Subject: Re: Can Multihop BFD be protected using RLFA backup? To: stephane.litkowski@orange.com Cc: "rtg-bfd@ietf.org" Content-Type: multipart/alternative; boundary="000000000000e2ff2b057fcdf91e" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 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, 19 Jan 2019 11:32:06 -0000 --000000000000e2ff2b057fcdf91e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thank you Stephane, Sasha, Jeff and Nagendra, for your feedback! Regards, Muthu On Fri, Jan 18, 2019 at 1:52 PM wrote: > Hi, > > > > When you are using multihop BFD RFC5883 you are not monitoring an LSP. > When IPFRR is activated, the primary goal of your BFD probe does not chan= ge > and is still not to monitor an LSP but the remote IP destination. So it > makes sense that FRR just pushes it stack without changing anything in th= e > BFD encaps. > > In addition, I don=E2=80=99t think that it will be easy from a dataplane = point of > view to change the BFD encaps on the fly during FRR. > > > > Brgds, > > > > *From:* Muthu Arul Mozhi Perumal [mailto:muthu.arul@gmail.com] > *Sent:* Thursday, January 17, 2019 12:02 > *To:* LITKOWSKI Stephane OBS/OINIS > *Cc:* rtg-bfd@ietf.org > *Subject:* Re: Can Multihop BFD be protected using RLFA backup? > > > > Hi Stephane, > > > > Thanks for your response. Please see inline.. > > > > On Thu, Jan 17, 2019 at 3:27 PM wrote: > > Hi, > > > > I think that the fact that =E2=80=9Ccontrol=E2=80=9D packets can benefit = of FRR is really > implementation dependent. It is also linked to the place where BFD packet= s > are created (RP or LC). > > From a theoretical point of view, nothing prevents FRR to be used as for > any packet generated by the router itself. > > > > Do we know of any implementation that provides RLFA FRR protection to > multihop BFD packets? > > > > Regarding the encapsulation, if your BFD client is using RFC5883, this > will not change during FRR, the FRR will just push labels on top > independently. > > > > The primary reason for my question on encapsulations is because RFC 4379 > has the foll. as one of the reasons for using the destination address > in 127/8 range for IPv4 (0:0:0:0:0:FFFF:7F00/104 range for IPv6) for > diagnostic packets sent over MPLS LSP: > > 1. Although the LSP in question may be broken in unknown ways, the > > likelihood of a diagnostic packet being delivered to a user of an > > MPLS service MUST be held to an absolute minimum. > > > > Since multihop BFD uses a routable destination address, wondering whether > there would be any issues if multihop BFD packets are sent over the RLFA > backup path without following RFC 5884 encapsulation.. > > > > Regards, > > Muthu > > > > Again, the possibility to get FRR is really implementation dependent, as > the forwarding decision of the BFD packet may not be taken by the network > processor of the LC. > > > > Brgds, > > > > *From:* Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] *On Behalf Of *Muthu > Arul Mozhi Perumal > *Sent:* Thursday, January 17, 2019 10:16 > *To:* rtg-bfd@ietf.org > *Subject:* Can Multihop BFD be protected using RLFA backup? > > > > Hi All, > > > > Multihop BFD (RFC 5883) packets are sent over UDP/IP. The encapsulation > used is identical to single hop BFD (RFC 5881) except that the UDP > destination port is set to 4784. > > > > Now, suppose on the ingress node there is no IP/LFA backup path for the > destination address tracked by multihop BFD, but there exists an an RLFA > backup path to that destination. In this case, is multihop BFD expected t= o > be protected using the RLFA backup path i.e should multihop BFD packets b= e > sent over the RLFA backup path if the primary path goes down? > > > > If multihop BFD packets are to be sent over the RLFA backup path, what > encapsulation should the ingress use? The encapsulation specified in RFC > 5883 or the encapsulation specified in RFC 5884 (MPLS BFD)? > > > > Please let me know you opinion. > > > > Regards, > > Muthu > > _________________________________________________________________________= ________________________________________________ > > > > Ce message et ses pieces jointes peuvent contenir des informations confid= entielles ou privilegiees et ne doivent donc > > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez re= cu ce message par erreur, veuillez le signaler > > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages = electroniques etant susceptibles d'alteration, > > Orange decline toute responsabilite si ce message a ete altere, deforme o= u falsifie. Merci. > > > > This message and its attachments may contain confidential or privileged i= nformation that may be protected by law; > > they should not be distributed, used or copied without authorisation. > > If you have received this email in error, please notify the sender and de= lete this message and its attachments. > > As emails may be altered, Orange is not liable for messages that have bee= n modified, changed or falsified. > > Thank you. > > _________________________________________________________________________= ________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confid= entielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez re= cu ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages = electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme o= u falsifie. Merci. > > This message and its attachments may contain confidential or privileged i= nformation that may be protected by law; > they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and de= lete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have bee= n modified, changed or falsified. > Thank you. > > --000000000000e2ff2b057fcdf91e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thank you Stephane,=C2=A0Sasha, Jeff and=C2=A0Nagendra, for you= r feedback!

Regards,
Muthu

On Fri, Jan 18, 2019 at 1:52 PM <stephane.litkowski@orange.com> wrote:

Hi,

=C2=A0

When you are using multihop BFD RFC5883 you = are not monitoring an LSP. When IPFRR is activated, the primary goal of you= r BFD probe does not change and is still not to monitor an LSP but the remote IP destination. So it makes sense tha= t FRR just pushes it stack without changing anything in the BFD encaps.<= /u>

In addition, I don=E2=80=99t think that it w= ill be easy from a dataplane point of view to change the BFD encaps on the = fly during FRR.

=C2=A0

Brgds,

=C2=A0

From: Muthu Arul Mozhi Perumal [mailto:muthu.arul@gmail.com]
Sent: Thursday, January 17, 2019 12:02
To: LITKOWSKI Stephane OBS/OINIS
Cc: rtg-bfd@ie= tf.org
Subject: Re: Can Multihop BFD be protected using RLFA backup?=

=C2=A0

Hi Step= hane,

= =C2=A0

Thanks = for your response. Please see inline..

=C2=A0

On Thu, Jan 17, 2019 at 3:27 PM <stephane.litkowski@orang= e.com> wrote:

Hi,

=C2=A0

I think that the fact that =E2=80=9Ccontrol= =E2=80=9D packets can benefit of FRR is really implementation dependent. It is also linked to the place where BFD packets are created (RP or LC).

From a theoretical point of view, nothing pr= events FRR to be used as for any packet generated by the router itself.

=C2=A0

Do we k= now of any implementation that provides RLFA FRR protection to multihop BFD= packets?

=C2=A0<= u>

Regarding the encapsulation, if your BFD cli= ent is using RFC5883, this will not change during FRR, the FRR will just push labels on top independently.

=C2=A0

The pri= mary reason for my question on encapsulations is because RFC 4379 has the f= oll. as one of the reasons for using the destination address in=C2=A0127/8 = range for IPv4 (0:0:0:0:0:FFFF:7F00/104 range for IPv6) for diagnostic packets sent over MPLS LSP:=C2=A0=

=C2=A0 = =C2=A01. Although the LSP in question may be broken in unknown ways, the=

=C2=A0 = =C2=A0 =C2=A0 likelihood of a diagnostic packet being delivered to a user o= f an

=C2=A0 = =C2=A0 =C2=A0 MPLS service MUST be held to an absolute minimum.

=C2=A0

Since m= ultihop BFD uses a routable destination address, wondering whether there wo= uld be any issues if multihop BFD packets are sent over the RLFA backup pat= h without following RFC 5884 encapsulation..

= =C2=A0

Regards= ,

Muthu

=C2=A0

Again, the possibility to get FRR is really = implementation dependent, as the forwarding decision of the BFD packet may not be taken by the network processor of the LC.

=C2=A0

Brgds,

=C2=A0

From: Rtg-bfd [mailto:rtg-bfd-bounces@ietf.org] On Behalf Of Muthu Arul Mozhi Perumal
Sent: Thursday, January 17, 2019 10:16
To: rtg-bfd@ie= tf.org
Subject: Can Multihop BFD be protected using RLFA backup?<= /u>

=C2=A0

Hi All,=

=C2=A0<= /span>

Multiho= p BFD (RFC 5883) packets are sent over UDP/IP. The encapsulation used is id= entical to single hop BFD (RFC 5881) except that the UDP destination port is set to 4784.

=C2=A0<= /span>

Now, su= ppose on the ingress node there is no IP/LFA backup path for the destinatio= n address tracked by multihop BFD, but there exists an an RLFA backup path to that destination. In this case, is multihop BFD = expected to be protected using the RLFA backup path i.e should multihop BFD= packets be sent over the RLFA backup path if the primary path goes down?

=C2=A0<= /span>

If mult= ihop BFD packets are to be sent over the RLFA backup path, what encapsulati= on should the ingress use? The encapsulation specified in RFC 5883 or the encapsulation specified in RFC 5884 (MPLS BFD)?<= u>

=C2=A0<= /span>

Please = let me=C2=A0know you opinion.

=C2=A0<= /span>

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

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
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