From nobody Mon Mar 9 08:31:12 2020 Return-Path: X-Original-To: lsvr@ietfa.amsl.com Delivered-To: lsvr@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6D30B3A12A3; Mon, 9 Mar 2020 08:31:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.098 X-Spam-Level: X-Spam-Status: No, score=-2.098 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ky4-cmzlTNhL; Mon, 9 Mar 2020 08:31:09 -0700 (PDT) Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) (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 E9B1F3A12B6; Mon, 9 Mar 2020 08:31:07 -0700 (PDT) Received: by mail-ed1-x52c.google.com with SMTP id h5so2151540edn.5; Mon, 09 Mar 2020 08:31:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=Z9HlxPkU8+7zFplF8yM1JBeRX443bhY8vWdcvuFDJ2U=; b=TPKTkbuhy3f8Fw/i5atA+KAUiY0Ra4YjVwX+fbWtQQz1s7CPZKDErms3tB7YRlISts fVyLjFCIp/sz6RD9IXDDA/L6ClIZxXMr06N6Rpi3WHmqu+R+eXJyc40Uyq9cvHUpcwpX kS0qFeCxVvhNulLJCQmB+qd7OrSslX3/4Cw1Js/OBO3c8Xx7v3obn4qGOJwoeHYqHXQW RzxJ20aLNcaWtL/26rG0Q/O6xcbvvodQEJccH60yLIL3QWJctqK+RcRAXE2eBSxJMhxl dxrE+wU8ahceclv2cKHaf2xCvwDWQiXv8L6r3GnZ6/MNaZogTSQ2SRGptpl1papk0Lva Cs5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=Z9HlxPkU8+7zFplF8yM1JBeRX443bhY8vWdcvuFDJ2U=; b=d8IVJtFcIO0Coht4tDGID8WKJE/n7Sj4M/zSbDuEDGozvtEW/MXsRRessUNEzSRk7k egIVTIjQE7oGXU3LG1VDIzkcIylFwzP/ctQ7b0VInYuf7HBWplb6XYpuQixVEiloz/h8 MTbXG7N7mb611MH8a9rWqRNPlItgAWmqPpsyPOXGo4x9gzBXvCA4K/7TI2tP89hE2Yaz BjbA6SuSKPo3JT4DGGxAfexfAwY6KSONpAwU63OI7yMQ/VLCXe7qr9Xl6CFWezYVmXmK xcjR8m+vXTHjuDgyKU0IqqvREGFSoxZgcGjIvaxKdJixfdQ4TRyUXAQBD14OrG6WQAlC tMXQ== X-Gm-Message-State: ANhLgQ0KclqfWVj/eSJWmbeVnH2mt8qZJXVVlt7I+igYURsrbDXOyemn AFaL24pvVpFYU0lJuA9Lm+wC4eEhlMu/Ebt142kMc4Mn X-Google-Smtp-Source: ADFU+vtyoT0D9cz9clcjKUHbP0Ivv/tDXsBs/w5PXm1eVhSZEGlhYsn20K56fjKOb6bx6tDWjv1++9m923uX2AlgsgE= X-Received: by 2002:a05:6402:951:: with SMTP id h17mr14934534edz.79.1583767866094; Mon, 09 Mar 2020 08:31:06 -0700 (PDT) MIME-Version: 1.0 From: Pushpasis Sarkar Date: Mon, 9 Mar 2020 21:00:55 +0530 Message-ID: To: draft-ietf-lsvr-bgp-spf@ietf.org Cc: lsvr@ietf.org Content-Type: multipart/alternative; boundary="00000000000010bc3d05a06db17d" Archived-At: Subject: [Lsvr] Need clarification on IGP-Metric TLV for LS Link Attributes in BGP-SPF deployments X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Mar 2020 15:31:11 -0000 --00000000000010bc3d05a06db17d Content-Type: text/plain; charset="UTF-8" Hi Authors, I need a small clarification on how the Link IGP-Metric TLV (type 1095) for the links originated by an BGP-SPF speaker look like. My doubt is specifically on what would be the length of the metric value. For example, following is the excerpt from RFC7752 section 3.3.2.4 which specifies the length to be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS wide-metrics. 3.3.2.4. IGP Metric TLV The IGP Metric TLV carries the metric for this link. The length of this TLV is variable, depending on the metric width of the underlying protocol. IS-IS small metrics have a length of 1 octet (the two most significant bits are ignored). OSPF link metrics have a length of 2 octets. IS-IS wide metrics have a length of 3 octets. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ // IGP Link Metric (variable length) // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 21: IGP Metric TLV Format What should be the length of the metric field when the origin is a BGP-SPF speaker? Looking forward to your clarification on this. Also it will be appreciated a lot if a sentence or two can be added to the draft clarifying the above in the next version. Thanks and regards, -Pushpasis --00000000000010bc3d05a06db17d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Authors,

I need a s= mall clarification on how the Link IGP-Metric TLV (type 1095) for the links= originated=C2=A0by an BGP-SPF speaker look like. My doubt is specifically = on what would be the length of the metric value. For=C2=A0example, followin= g is the excerpt from RFC7752 section 3.3.2.4 which specifies the length to= be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS wide-metrics.=C2= =A0

3.3.2.4.  IGP Metric TLV

   The IGP Metric TLV carries the metric for this link.  The length of
   this TLV is variable, depending on the metric width of the underlying
   protocol.  IS-IS small metrics have a length of 1 octet (the two most
   significant bits are ignored).  OSPF link metrics have a length of 2
   octets.  IS-IS wide metrics have a length of 3 octets.

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |              Type             |             Length            |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     //      IGP Link Metric (variable length)      //
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                     Figure 21: IGP Metric TLV Format

What should be the length of the metric field when the origi= n is a BGP-SPF speaker?=C2=A0

Looking forward to y= our clarification on this. Also it will be appreciated a lot if a sentence = or two can be added to the draft clarifying the above in the next version.<= /div>

Thanks and regards,
-Pushpasis

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boundary="_000_DB8PR07MB6300375BAEE02CF75CDEC9CBE0FF0DB8PR07MB6300eurp_" MIME-Version: 1.0 X-OriginatorOrg: nokia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 46206696-bbe0-4678-451d-08d7c50b4b47 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Mar 2020 15:54:19.3353 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5d471751-9675-428d-917b-70f44f9630b0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: OohdcZo41QvxIL1SvJuUX+3tziXn5Dv66jHDH2NuaBm5IV/hTQ4k0nweU42rtkC+s/Zcvd4TyjRmFMmBRORUPCIWePn+nUW+QbekbG6E7YI= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR07MB6410 Archived-At: Subject: Re: [Lsvr] IETF 107 LSVR Meeting Call for Agenda Items X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Mar 2020 15:54:24 -0000 --_000_DB8PR07MB6300375BAEE02CF75CDEC9CBE0FF0DB8PR07MB6300eurp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, Due to the current global travel problematics and lack of topic requests, t= he LSVR WG meeting at IETF107 is cancelled. See you all at IETF108 Kind Regards, Gunter Van de Velde From: Lsvr On Behalf Of Van De Velde, Gunter (Nokia= - BE/Antwerp) Sent: Wednesday, February 26, 2020 16:22 To: lsvr@ietf.org Cc: Victor Kuarsingh Subject: [Lsvr] IETF 107 LSVR Meeting Call for Agenda Items The LSVR (link-state-vector-routing) WG will be meeting on Thursday, March = 26th, 2019 from 15:50 to 17:20 PM. Please send us (lsrv-chairs@ietf.org) any requ= ests for presentation slots. Thanks, Gunter & Victor PS: The IETF 107 Preliminary Agenda has been posted... The final agenda wil= l be published on Friday, Feb 28, 2020. https://datatracker.ietf.org/meeting/107/agenda.html https://datatracker.ietf.org/meeting/107/agenda.txt --_000_DB8PR07MB6300375BAEE02CF75CDEC9CBE0FF0DB8PR07MB6300eurp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi All,

 

Due to the current global travel problematics and la= ck of topic requests, the LSVR WG meeting at IETF107 is cancelled.

 

See you all at IETF108

 

Kind Regards,

Gunter Van de Velde

 

From: Lsvr <lsvr-bounces@ietf.org> O= n Behalf Of Van De Velde, Gunter (Nokia - BE/Antwerp)
Sent: Wednesday, February 26, 2020 16:22
To: lsvr@ietf.org
Cc: Victor Kuarsingh <victor@jvknet.com>
Subject: [Lsvr] IETF 107 LSVR Meeting Call for Agenda Items

 

The LSVR (link-state-vector-routing) WG will be mee=
ting on Thursday, March 26th, 2019 from 15:50 to 17:20 PM.
 
Please send us (lsrv-chairs@ietf.org) any requests for presentation slots.
 
Thanks,
Gunter & Victor
 
PS: The IETF 107 Preliminary Agenda has been posted=
... The final agenda will be published on Friday, Feb 28, 2020.<=
/span>

https://datatracker.ietf.org/meeting/107/agenda.html

https://datatracker.ietf.org/meeting/107/agenda.txt=

 

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SMTP id n25so9546879eds.10; Sat, 21 Mar 2020 06:00:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=FO+LCclGTylj6iZY2oQsCZg+hheMTC8dhJYJ0inUobc=; b=svZSYJAiGU0HiGIo1eRm5CxFSpJ2QolMNYZno3ne61fVZTygP8b2DpFO5RlTo4sEn8 CHMCmaJgac+9UGKygXQuF40O2/AQuMXyl3mkbU0FXyKWuCSwjZ9oBe89Rd42TS5WtKYd xAs/CpLy2ccVkVzTG8DSsfVlG+ZWP8lB8JJem0W08tGW0IReyexw/QvTnjmfSqaTDyYi wz/n1CQYG33lXhjWeEbII9zzRLBZNTK8dR1bCP8EsACM8N5mG2KsWgcj1AU6utcef59M JRoYMPcgVBE+t+AzKjwEyeYq2HLLpAEYM5C7tuQtREB0GvVTyCWEGNL+9RtvBwe7ShZJ xgGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=FO+LCclGTylj6iZY2oQsCZg+hheMTC8dhJYJ0inUobc=; b=Aw3tsJV67EKSt5UDXJg8yVLUaP9n9vhXIaYcfHIHxh3iG4HRQZZvGgpTsx1/DKhZWx PqkcborLjJLpSus2Ys4+nonHNsJh/olN6WpSmjuBUEfuvogRbsNinQykWzt98lyreK1X RTe0Tp+RS0YaZBXkt4yQKUvsg5EQMBuEfgikP/Iy295LMAurftehbv7yaw7XZR4VSvjy RuHGXIcBmbtWTXx8fi/6rJ7VJ4U7xU1rwyNm/N9ARH1OVWv1l8N4MrQHXf54/LB361It W6AYYY3x9uc1euc10EkUFKqVRUksUQ6FU6JhoVPlER7gd22F7UXUn0xpcIFL3TM9Zsoc 4kbw== X-Gm-Message-State: ANhLgQ3iqjXmIAgadmftLrR8JhrfiWr3yWEwWS8Jm/EGJeANc4VVF+qa vcFBF3PTE4yXAx/orz/6S8U47k0hog+nshtjZWw= X-Google-Smtp-Source: ADFU+vtfeLyI6TJObTuFazA+eq8jo0VpGOfLbZqiMLWtpKhnMPfMxGtkgvW5PHE7Tdl7TFl9zhbRScaerwJTWFKKjd8= X-Received: by 2002:a05:6402:1c0c:: with SMTP id ck12mr13060788edb.145.1584795611220; Sat, 21 Mar 2020 06:00:11 -0700 (PDT) MIME-Version: 1.0 References: <7DFD0D7F-65FC-4032-BCD2-7A2A1CA44512@cisco.com> In-Reply-To: <7DFD0D7F-65FC-4032-BCD2-7A2A1CA44512@cisco.com> From: Pushpasis Sarkar Date: Sat, 21 Mar 2020 18:30:00 +0530 Message-ID: To: "Acee Lindem (acee)" Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" , "lsvr@ietf.org" Content-Type: multipart/alternative; boundary="00000000000072cf3c05a15cfb05" Archived-At: Subject: Re: [Lsvr] Need clarification on IGP-Metric TLV for LS Link Attributes in BGP-SPF deployments X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Mar 2020 13:00:15 -0000 --00000000000072cf3c05a15cfb05 Content-Type: text/plain; charset="UTF-8" Hi Acee, My personal preference will be having it as a 4-byte metric due to ease of implementation as well as encoding/decoding efficiency due word-size alignment. It may not be a big thing but encoding/decoding a 3-byte value to/from byte stream is few more CPU instructions than just a 4-byte read from a memory address. Thanks -Pushpasis On Sat, Mar 21, 2020 at 12:10 AM Acee Lindem (acee) wrote: > Hi Pushpasis, > > I think for BGP-LS SPF we should always use 3 octet metrics. This will > offer the most flexibility w/o redefining the TLV. If you agree, I will > update the SPF draft to state this. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Monday, March 9, 2020 at 11:31 AM > *To: *"draft-ietf-lsvr-bgp-spf@ietf.org" > > *Cc: *"lsvr@ietf.org" > *Subject: *Need clarification on IGP-Metric TLV for LS Link Attributes in > BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Monday, March 9, 2020 at 11:31 AM > > > > Hi Authors, > > > > I need a small clarification on how the Link IGP-Metric TLV (type 1095) > for the links originated by an BGP-SPF speaker look like. My doubt is > specifically on what would be the length of the metric value. For example, > following is the excerpt from RFC7752 section 3.3.2.4 which specifies the > length to be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS > wide-metrics. > > > > 3.3.2.4. IGP Metric TLV > > > > The IGP Metric TLV carries the metric for this link. The length of > > this TLV is variable, depending on the metric width of the underlying > > protocol. IS-IS small metrics have a length of 1 octet (the two most > > significant bits are ignored). OSPF link metrics have a length of 2 > > octets. IS-IS wide metrics have a length of 3 octets. > > > > 0 1 2 3 > > 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > | Type | Length | > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > // IGP Link Metric (variable length) // > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > > > Figure 21: IGP Metric TLV Format > > > > What should be the length of the metric field when the origin is a BGP-SPF > speaker? > > > > Looking forward to your clarification on this. Also it will be appreciated > a lot if a sentence or two can be added to the draft clarifying the above > in the next version. > > > > Thanks and regards, > > -Pushpasis > > > --00000000000072cf3c05a15cfb05 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi=C2=A0Acee,=C2=A0

My personal prefere= nce will be having it as a 4-byte metric due to ease of implementation as w= ell as encoding/decoding efficiency due word-size alignment. It may not be = a big thing but encoding/decoding a 3-byte value to/from byte stream is few= more CPU instructions=C2=A0than just a 4-byte read from a memory address.= =C2=A0

Thanks
-Pushpasis

=
On Sat, Ma= r 21, 2020 at 12:10 AM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpasis,

I think for BGP-LS SPF we should always use 3 octet = metrics. This will offer the most flexibility w/o redefining the TLV. If yo= u agree, I will update the SPF draft to state this.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <= pushpasis.iet= f@gmail.com>
Date: Monday, March 9, 2020 at 11:31 AM
To: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>
Cc: "lsvr@ie= tf.org" <lsv= r@ietf.org>
Subject: Need clarification on IGP-Metric TLV for LS Link Attributes= in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Monday, March 9, 2020 at 11:31 AM<= /p>

=C2=A0

Hi Authors,

=C2=A0

I need a small clarifica= tion on how the Link IGP-Metric TLV (type 1095) for the links originated=C2= =A0by an BGP-SPF speaker look like. My doubt is specifically on what would = be the length of the metric value. For=C2=A0example, following is the excerpt from RFC7752 section 3.3.2.4 which specifies the = length to be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS wide-me= trics.=C2=A0

=C2=A0

3.3.2.4.=C2=A0 I=
GP Metric TLV
=C2=A0
=C2=A0=C2=A0 The IGP Metric TLV carries=
 the metric for this link.=C2=A0 The length of
=C2=A0=C2=A0 this TLV is variable, depe=
nding on the metric width of the underlying
=C2=A0=C2=A0 protocol.=C2=A0 IS-IS smal=
l metrics have a length of 1 octet (the two most
=C2=A0=C2=A0 significant bits are ignor=
ed).=C2=A0 OSPF link metrics have a length of 2
=C2=A0=C2=A0 octets.=C2=A0 IS-IS wide m=
etrics have a length of 3 octets.
=C2=A0
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 3
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0 1 2 3 =
4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Type=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Lengt=
h=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |


=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

=C2=A0=C2=A0=C2=A0=C2=A0 //=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 IGP Link Metric (variable length)=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 //


=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 Figure 21: IGP Metric TLV Format

=C2=A0

What should be the lengt= h of the metric field when the origin is a BGP-SPF speaker?=C2=A0=

=C2=A0

Looking forward to your = clarification on this. Also it will be appreciated a lot if a sentence or t= wo can be added to the draft clarifying the above in the next version.

=C2=A0

Thanks and regards,

-Pushpasis=

=C2=A0

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multipart/alternative; boundary="000000000000dcf11805a15e07f4" Archived-At: Subject: Re: [Lsvr] Need clarification on IGP-Metric TLV for LS Link Attributes in BGP-SPF deployments X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Mar 2020 14:15:19 -0000 --000000000000dcf11805a15e07f4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Acee, I thought RFC7752 says it is a variable length TLV. 1-byte, 2-byte, and 3-byte metrics are possible lengths. Can't we add a 4th possible length via this draft? If not then a new TLV may be a better option. However if I remember correctly, there is a RFC7752 bis being worked upon. Is there an option we can add it in that document? Not sure if it will be a proper way or not. Just thinking out loud :) Thanks -Pushpasis On Sat, Mar 21, 2020 at 7:17 PM Acee Lindem (acee) wrote: > Hi Pushpasis, > > If we use a length of 4, we=E2=80=99d need a new TLV (or modify RFC 7752)= . I think > the former would be a better option. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Saturday, March 21, 2020 at 9:00 AM > *To: *Acee Lindem > *Cc: *"draft-ietf-lsvr-bgp-spf@ietf.org" , > "lsvr@ietf.org" > *Subject: *Re: Need clarification on IGP-Metric TLV for LS Link > Attributes in BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem = , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Saturday, March 21, 2020 at 9:00 AM > > > > Hi Acee, > > > > My personal preference will be having it as a 4-byte metric due to ease o= f > implementation as well as encoding/decoding efficiency due word-size > alignment. It may not be a big thing but encoding/decoding a 3-byte value > to/from byte stream is few more CPU instructions than just a 4-byte read > from a memory address. > > > > Thanks > > -Pushpasis > > > > On Sat, Mar 21, 2020 at 12:10 AM Acee Lindem (acee) > wrote: > > Hi Pushpasis, > > I think for BGP-LS SPF we should always use 3 octet metrics. This will > offer the most flexibility w/o redefining the TLV. If you agree, I will > update the SPF draft to state this. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Monday, March 9, 2020 at 11:31 AM > *To: *"draft-ietf-lsvr-bgp-spf@ietf.org" > > *Cc: *"lsvr@ietf.org" > *Subject: *Need clarification on IGP-Metric TLV for LS Link Attributes in > BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem = , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Monday, March 9, 2020 at 11:31 AM > > > > Hi Authors, > > > > I need a small clarification on how the Link IGP-Metric TLV (type 1095) > for the links originated by an BGP-SPF speaker look like. My doubt is > specifically on what would be the length of the metric value. For example= , > following is the excerpt from RFC7752 section 3.3.2.4 which specifies the > length to be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS > wide-metrics. > > > > 3.3.2.4. IGP Metric TLV > > > > The IGP Metric TLV carries the metric for this link. The length of > > this TLV is variable, depending on the metric width of the underlying > > protocol. IS-IS small metrics have a length of 1 octet (the two most > > significant bits are ignored). OSPF link metrics have a length of 2 > > octets. IS-IS wide metrics have a length of 3 octets. > > > > 0 1 2 3 > > 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > | Type | Length | > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > // IGP Link Metric (variable length) // > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > > > Figure 21: IGP Metric TLV Format > > > > What should be the length of the metric field when the origin is a BGP-SP= F > speaker? > > > > Looking forward to your clarification on this. Also it will be appreciate= d > a lot if a sentence or two can be added to the draft clarifying the above > in the next version. > > > > Thanks and regards, > > -Pushpasis > > > > --000000000000dcf11805a15e07f4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Acee,=C2=A0

I thought RFC7752 says i= t is a variable length TLV. 1-byte, 2-byte, and 3-byte metrics are possible= lengths. Can't we add a 4th possible length via this draft? If not the= n a new TLV may be a better=C2=A0option.=C2=A0

How= ever if I remember correctly, there is a RFC7752 bis being worked upon. Is = there an option we can add it in that document? Not sure if it will be a pr= oper way or not. Just thinking out loud :)

Thanks<= /div>
-Pushpasis


On Sat, Mar 21, 2020 at 7:17 PM Ac= ee Lindem (acee) <acee@cisco.com&g= t; wrote:

Hi Pushpasis,

If we use a length of 4, we=E2=80=99d need a new TLV= (or modify RFC 7752). I think the former would be a better option.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <= pushpasis.iet= f@gmail.com>
Date: Saturday, March 21, 2020 at 9:00 AM
To: Acee Lindem <acee@cisco.com>
Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>
Subject: Re: Need clarification on IGP-Metric TLV for LS Link Attrib= utes in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Saturday, March 21, 2020 at 9:00 AM

=C2=A0

Hi=C2=A0Acee,=C2=A0 <= /u>

=C2=A0

My personal preference w= ill be having it as a 4-byte metric due to ease of implementation as well a= s encoding/decoding efficiency due word-size alignment. It may not be a big= thing but encoding/decoding a 3-byte value to/from byte stream is few more CPU instructions=C2=A0than just a 4-= byte read from a memory address.=C2=A0

=C2=A0

Thanks

-Pushpasis=

=C2=A0

On Sat, Mar 21, 2020 at = 12:10 AM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpasis,

I think for BGP-LS SPF we should always use 3 octet metrics. This will offe= r the most flexibility w/o redefining the TLV. If you agree, I will update = the SPF draft to state this.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <pushpasis.ietf@gmail.com> Date: Monday, March 9, 2020 at 11:31 AM
To: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>
Cc: "lsvr@ie= tf.org" <lsv= r@ietf.org>
Subject: Need clarification on IGP-Metric TLV for LS Link Attributes= in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Monday, March 9, 2020 at 11:31 AM<= /p>

=C2=A0

Hi Authors,

=C2=A0

I need a small clarification on how the Link IGP-Metric TLV (type 1095) for= the links originated=C2=A0by an BGP-SPF speaker look like. My doubt is spe= cifically on what would be the length of the metric value. For=C2=A0example= , following is the excerpt from RFC7752 section 3.3.2.4 which specifies the length to be 1, 2 or 3 bytes for ISIS narrow-m= etrics, OSPF and ISIS wide-metrics.=C2=A0

=C2=A0

3.3.2.4.=C2=A0 IGP Metric TL=
V
=C2=A0<=
/pre>

=C2=A0=C2=A0 The IGP Metric =
TLV carries the metric for this link.=C2=A0 The length of<=
/u>


=C2=A0=C2=A0 this TLV is var=
iable, depending on the metric width of the underlying=



=C2=A0=C2=A0 protocol.=C2=A0=
 IS-IS small metrics have a length of 1 octet (the two most


=C2=A0=C2=A0 significant bit=
s are ignored).=C2=A0 OSPF link metrics have a length of 2=



=C2=A0=C2=A0 octets.=C2=A0 I=
S-IS wide metrics have a length of 3 octets.


=C2=A0<=
/pre>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 3


=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1<=
u>


=C2=A0=C2=A0=C2=A0=C2=A0 +-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0=C2=A0=C2=A0=C2=A0 |=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 Type=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 Length=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 |


=C2=A0=C2=A0=C2=A0=C2=A0 +-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0=C2=A0=C2=A0=C2=A0 //=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 IGP Link Metric (variable length)=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 //


=C2=A0=C2=A0=C2=A0=C2=A0 +-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0<=
/pre>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 Figure 21: IGP Metric TLV Format

=C2=A0

What should be the length of the metric field when the origin is a BGP-SPF = speaker?=C2=A0

=C2=A0

Looking forward to your clarification on this. Also it will be appreciated = a lot if a sentence or two can be added to the draft clarifying the above i= n the next version.

=C2=A0

Thanks and regards,

-Pushpasis

=C2=A0

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HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w-T4zVEDsWOP; Sun, 22 Mar 2020 08:43:49 -0700 (PDT) Received: from mail-ed1-x52d.google.com (mail-ed1-x52d.google.com [IPv6:2a00:1450:4864:20::52d]) (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 2086F3A088D; Sun, 22 Mar 2020 08:43:49 -0700 (PDT) Received: by mail-ed1-x52d.google.com with SMTP id b21so13407165edy.9; Sun, 22 Mar 2020 08:43:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=WxxEJkFVgMl1WPxRC2MH9lua799g9gvOH5VCOIhDG9U=; 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ANhLgQ0trg7lR8A9EU3Bjq4wEIRlzm/Xp37mA7uUhVZufoBcQJCYled8 on45+NBgEwpkAETaXdqHZEsc9eTVdIrHvvnnt/I9Sg== X-Google-Smtp-Source: ADFU+vtjBjc9W93OHJ/vXKaxMyxwEAjN7TsBvEFU5Sr7ioBOa/7dD4OrYjDSQ6vEEF4w2HcIBD1jQ1erGfLvHaiv2YU= X-Received: by 2002:a05:6402:7c1:: with SMTP id u1mr1730252edy.79.1584891827638; Sun, 22 Mar 2020 08:43:47 -0700 (PDT) MIME-Version: 1.0 References: <7DFD0D7F-65FC-4032-BCD2-7A2A1CA44512@cisco.com> <8FF70B9D-58AF-4A92-BD43-C55186C3A8DB@cisco.com> <140CF301-A548-4FD0-B103-759817A49BA2@cisco.com> In-Reply-To: <140CF301-A548-4FD0-B103-759817A49BA2@cisco.com> From: Pushpasis Sarkar Date: Sun, 22 Mar 2020 21:13:15 +0530 Message-ID: To: "Acee Lindem (acee)" Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" , "lsvr@ietf.org" Content-Type: multipart/alternative; boundary="00000000000064ee9405a1736248" Archived-At: Subject: Re: [Lsvr] Need clarification on IGP-Metric TLV for LS Link Attributes in BGP-SPF deployments X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Mar 2020 15:43:53 -0000 --00000000000064ee9405a1736248 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Acee, Sure. If anyone doesn't prefer any other way we can proceed with this. Thanks -Pushpasis On Sat, Mar 21, 2020 at 7:49 PM Acee Lindem (acee) wrote: > Hi Pushpais, > > I think we can get away with this w/o modifying RFC 7752 since, as you > noted, it just says it is variable. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Saturday, March 21, 2020 at 10:15 AM > *To: *Acee Lindem > *Cc: *"draft-ietf-lsvr-bgp-spf@ietf.org" , > "lsvr@ietf.org" > *Subject: *Re: Need clarification on IGP-Metric TLV for LS Link > Attributes in BGP-SPF deployments > > > > Hi Acee, > > > > I thought RFC7752 says it is a variable length TLV. 1-byte, 2-byte, and > 3-byte metrics are possible lengths. Can't we add a 4th possible length v= ia > this draft? If not then a new TLV may be a better option. > > > > However if I remember correctly, there is a RFC7752 bis being worked upon= . > Is there an option we can add it in that document? Not sure if it will be= a > proper way or not. Just thinking out loud :) > > > > Thanks > > -Pushpasis > > > > > > On Sat, Mar 21, 2020 at 7:17 PM Acee Lindem (acee) wrote= : > > Hi Pushpasis, > > If we use a length of 4, we=E2=80=99d need a new TLV (or modify RFC 7752)= . I think > the former would be a better option. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Saturday, March 21, 2020 at 9:00 AM > *To: *Acee Lindem > *Cc: *"draft-ietf-lsvr-bgp-spf@ietf.org" , > "lsvr@ietf.org" > *Subject: *Re: Need clarification on IGP-Metric TLV for LS Link > Attributes in BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem = , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Saturday, March 21, 2020 at 9:00 AM > > > > Hi Acee, > > > > My personal preference will be having it as a 4-byte metric due to ease o= f > implementation as well as encoding/decoding efficiency due word-size > alignment. It may not be a big thing but encoding/decoding a 3-byte value > to/from byte stream is few more CPU instructions than just a 4-byte read > from a memory address. > > > > Thanks > > -Pushpasis > > > > On Sat, Mar 21, 2020 at 12:10 AM Acee Lindem (acee) > wrote: > > Hi Pushpasis, > > I think for BGP-LS SPF we should always use 3 octet metrics. This will > offer the most flexibility w/o redefining the TLV. If you agree, I will > update the SPF draft to state this. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Monday, March 9, 2020 at 11:31 AM > *To: *"draft-ietf-lsvr-bgp-spf@ietf.org" > > *Cc: *"lsvr@ietf.org" > *Subject: *Need clarification on IGP-Metric TLV for LS Link Attributes in > BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem = , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Monday, March 9, 2020 at 11:31 AM > > > > Hi Authors, > > > > I need a small clarification on how the Link IGP-Metric TLV (type 1095) > for the links originated by an BGP-SPF speaker look like. My doubt is > specifically on what would be the length of the metric value. For example= , > following is the excerpt from RFC7752 section 3.3.2.4 which specifies the > length to be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS > wide-metrics. > > > > 3.3.2.4. IGP Metric TLV > > > > The IGP Metric TLV carries the metric for this link. The length of > > this TLV is variable, depending on the metric width of the underlying > > protocol. IS-IS small metrics have a length of 1 octet (the two most > > significant bits are ignored). OSPF link metrics have a length of 2 > > octets. IS-IS wide metrics have a length of 3 octets. > > > > 0 1 2 3 > > 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > | Type | Length | > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > // IGP Link Metric (variable length) // > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > > > Figure 21: IGP Metric TLV Format > > > > What should be the length of the metric field when the origin is a BGP-SP= F > speaker? > > > > Looking forward to your clarification on this. Also it will be appreciate= d > a lot if a sentence or two can be added to the draft clarifying the above > in the next version. > > > > Thanks and regards, > > -Pushpasis > > > > --00000000000064ee9405a1736248 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Acee,=C2=A0

Sure. If anyone doesn= 9;t prefer any other way we can proceed with this.

Thanks
-Pushpasis


On Sat, Mar 21, 2020 at 7:= 49 PM Acee Lindem (acee) <acee@cisco.c= om> wrote:

Hi Pushpais,

I think we can get away with this w/o modifying RFC = 7752 since, as you noted, it just says it is variable.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <= pushpasis.iet= f@gmail.com>
Date: Saturday, March 21, 2020 at 10:15 AM
To: Acee Lindem <acee@cisco.com>
Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>
Subject: Re: Need clarification on IGP-Metric TLV for LS Link Attrib= utes in BGP-SPF deployments

=C2=A0

Hi Acee,=C2=A0

=C2=A0

I thought RFC7752 says i= t is a variable length TLV. 1-byte, 2-byte, and 3-byte metrics are possible= lengths. Can't we add a 4th possible length via this draft? If not the= n a new TLV may be a better=C2=A0option.=C2=A0

=C2=A0

However if I remember co= rrectly, there is a RFC7752 bis being worked upon. Is there an option we ca= n add it in that document? Not sure if it will be a proper way or not. Just= thinking out loud :)

=C2=A0

Thanks

-Pushpasis=

=C2=A0

=C2=A0

On Sat, Mar 21, 2020 at = 7:17 PM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpasis,

If we use a length of 4, we=E2=80=99d need a new TLV (or modify RFC 7752). = I think the former would be a better option.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <pushpasis.ietf@gmail.com> Date: Saturday, March 21, 2020 at 9:00 AM
To: Acee Lindem <acee@cisco.com>
Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org&g= t;
Subject: Re: Need clarification on IGP-Metric TLV for LS Link Attrib= utes in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Saturday, March 21, 2020 at 9:00 AM

=C2=A0

Hi=C2=A0Acee,=C2=A0

=C2=A0

My personal preference will be having it as a 4-byte metric due to ease of = implementation as well as encoding/decoding efficiency due word-size alignm= ent. It may not be a big thing but encoding/decoding a 3-byte value to/from= byte stream is few more CPU instructions=C2=A0than just a 4-byte read from a memory address.=C2=A0

=C2=A0

Thanks

-Pushpasis

=C2=A0

On Sat, Mar 21, 2020 at 12:10 AM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpasis,

I think for BGP-LS SPF we should always use 3 octet metrics. This will offe= r the most flexibility w/o redefining the TLV. If you agree, I will update = the SPF draft to state this.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <pushpasis.ietf@gmail.com> Date: Monday, March 9, 2020 at 11:31 AM
To: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>
Cc: "lsvr@ie= tf.org" <lsv= r@ietf.org>
Subject: Need clarification on IGP-Metric TLV for LS Link Attributes= in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Monday, March 9, 2020 at 11:31 AM<= /p>

=C2=A0

Hi Authors,

=C2=A0

I need a small clarification on how the Link IGP-Metric TLV (type 1095) for= the links originated=C2=A0by an BGP-SPF speaker look like. My doubt is spe= cifically on what would be the length of the metric value. For=C2=A0example= , following is the excerpt from RFC7752 section 3.3.2.4 which specifies the length to be 1, 2 or 3 bytes for ISIS narrow-m= etrics, OSPF and ISIS wide-metrics.=C2=A0

=C2=A0

3.3.2.4.=C2=A0 IGP Metric TLV<=
/span>
=C2=A0

=C2=A0=C2=A0 The IGP Metric TL=
V carries the metric for this link.=C2=A0 The length of


=C2=A0=C2=A0 this TLV is varia=
ble, depending on the metric width of the underlying

=C2=A0=C2=A0 protocol.=C2=A0 I=
S-IS small metrics have a length of 1 octet (the two most<=
/u>


=C2=A0=C2=A0 significant bits =
are ignored).=C2=A0 OSPF link metrics have a length of 2


=C2=A0=C2=A0 octets.=C2=A0 IS-=
IS wide metrics have a length of 3 octets.


=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 3


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1<=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<=
u>


=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 Type=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 Length=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 |


=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<=
u>


=C2=A0=C2=A0=C2=A0=C2=A0 //=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 IGP Link Metric (variable length)=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 //


=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 Figure 21: IGP Metric TLV Format

=C2=A0

What should be the length of the metric field when the origin is a BGP-SPF = speaker?=C2=A0

=C2=A0

Looking forward to your clarification on this. Also it will be appreciated = a lot if a sentence or two can be added to the draft clarifying the above i= n the next version.

=C2=A0

Thanks and regards,

-Pushpasis

=C2=A0

--00000000000064ee9405a1736248-- From nobody Tue Mar 24 07:45:23 2020 Return-Path: X-Original-To: lsvr@ietf.org Delivered-To: lsvr@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id A9CC33A0034; Tue, 24 Mar 2020 07:45:20 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: lsvr@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.122.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: lsvr@ietf.org Message-ID: <158506112062.11678.8486981047590162189@ietfa.amsl.com> Date: Tue, 24 Mar 2020 07:45:20 -0700 Archived-At: Subject: [Lsvr] I-D Action: draft-ietf-lsvr-bgp-spf-08.txt X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Mar 2020 14:45:21 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Link State Vector Routing WG of the IETF. Title : Shortest Path Routing Extensions for BGP Protocol Authors : Keyur Patel Acee Lindem Shawn Zandi Wim Henderickx Filename : draft-ietf-lsvr-bgp-spf-08.txt Pages : 22 Date : 2020-03-24 Abstract: Many Massively Scaled Data Centers (MSDCs) have converged on simplified layer 3 routing. Furthermore, requirements for operational simplicity have led many of these MSDCs to converge on BGP as their single routing protocol for both their fabric routing and their Data Center Interconnect (DCI) routing. This document describes a solution which leverages BGP Link-State distribution and the Shortest Path First (SPF) algorithm similar to Internal Gateway Protocols (IGPs) such as OSPF. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-lsvr-bgp-spf/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-lsvr-bgp-spf-08 https://datatracker.ietf.org/doc/html/draft-ietf-lsvr-bgp-spf-08 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-lsvr-bgp-spf-08 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. 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lsvr@ietf.org Message-ID: <158508551471.19706.3573984513445007170@ietfa.amsl.com> Date: Tue, 24 Mar 2020 14:31:54 -0700 Archived-At: Subject: [Lsvr] I-D Action: draft-ietf-lsvr-applicability-05.txt X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Mar 2020 21:31:56 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Link State Vector Routing WG of the IETF. Title : Usage and Applicability of Link State Vector Routing in Data Centers Authors : Keyur Patel Acee Lindem Shawn Zandi Gaurav Dawra Filename : draft-ietf-lsvr-applicability-05.txt Pages : 14 Date : 2020-03-24 Abstract: This document discusses the usage and applicability of Link State Vector Routing (LSVR) extensions in data center networks utilizing CLOS or Fat-Tree topologies. The document is intended to provide a simplified guide for the deployment of LSVR extensions. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-lsvr-applicability/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-lsvr-applicability-05 https://datatracker.ietf.org/doc/html/draft-ietf-lsvr-applicability-05 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-lsvr-applicability-05 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. 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c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=1Pi+plYHkp8EZd11dgbWBlqocovbOKJYukejjszRrFY=; b=mvu4WphfMkfKwCb/lhXm8ve6qxZoo7ONrCKpOzY+blOPgMMZjFHL3d8JuKXXklci2b XtsURfghAzZe29BpawUm2aAO+BLv58tHwKFUncEt9znaqE7nzZlOM/baVkozT5fsYtIa eLX12abbXIHcup8DvdSYuraV81DeG3/FSR+U5zrQDPJp9s9iyrkL7/p0WvGQJ5ru+r+z N3617myE4Ht3y5UkwAegglZFlwO1PLjJCiMkVEM+4ZsqqipaynywRthOo37A+HTXFvHE EpU3xTpWb7oMJlTIFiC+HfSRUtJXkTIIk+a9bHFo0wOLm0G8dlsFAQigdHQk3Nk4gYNB qllQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=1Pi+plYHkp8EZd11dgbWBlqocovbOKJYukejjszRrFY=; b=iIo5mb9nB07VMVY6cgghgLkASyB0IJny2xTJym0jaIOY6t+s0QRj/d4aPrgVmKq9AT fdZFuqhdoYvF6WBmwkoKKcbr4r+ysBS9LXyYYrD4pDRdD0yNDjLDeXoCk33S18wcGN6w GUP56gcWu0hXnZq+Kpii9n26M1pVW7WdWHY/Zsdlh+YlAxsfdbL+3mnS66ugEjfWhPES kk6WVsCm5OeQPtftldKewfxp/JP4CpAA1qU7rS3xRgAymvg/w8vPewQXSDSEtKunGSXk aQambE8ST2hQxJVPtJZNyVmQBg4ppvAYnkjxarQPiNgXdSJjawA0fZkG3AE/lfxwHMdI BjkA== X-Gm-Message-State: ANhLgQ3JvXenZt4T3SUQXpsTU78U6ckVcPKenZmC82+nLo2ZYUveThWL 4E84HL+JGhw/NbPAuW6eIemTjAeneeinAnx+nnDDhA== X-Google-Smtp-Source: ADFU+vt25C7/w7NktMtDl2ibL+cN4ozi2q7Px0VGm4lq8WwgzwyrslpAmjPX5PLuNvzmDD7KZSKXLuUA+CGhQe6Eg0s= X-Received: by 2002:a17:906:b212:: with SMTP id p18mr9754094ejz.59.1585254514145; Thu, 26 Mar 2020 13:28:34 -0700 (PDT) MIME-Version: 1.0 References: <7DFD0D7F-65FC-4032-BCD2-7A2A1CA44512@cisco.com> <8FF70B9D-58AF-4A92-BD43-C55186C3A8DB@cisco.com> <140CF301-A548-4FD0-B103-759817A49BA2@cisco.com> <323B15AE-53FE-4EE5-B4F2-7C189A699EA4@cisco.com> In-Reply-To: <323B15AE-53FE-4EE5-B4F2-7C189A699EA4@cisco.com> From: Pushpasis Sarkar Date: Fri, 27 Mar 2020 01:58:23 +0530 Message-ID: To: "Acee Lindem (acee)" Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" , "lsvr@ietf.org" Content-Type: multipart/alternative; boundary="00000000000031befe05a1c7d4d5" Archived-At: Subject: Re: [Lsvr] Need clarification on IGP-Metric TLV for LS Link Attributes in BGP-SPF deployments X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Mar 2020 20:28:58 -0000 --00000000000031befe05a1c7d4d5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Acee, Thanks a lot for taking care of this. Best regards -Pushpasis On Tue, Mar 24, 2020 at 8:18 PM Acee Lindem (acee) wrote: > Hi Pushpasis, et al, > > This is clarified in the -08 version of the draft. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Sunday, March 22, 2020 at 11:43 AM > *To: *Acee Lindem > *Cc: *"draft-ietf-lsvr-bgp-spf@ietf.org" , > "lsvr@ietf.org" > *Subject: *Re: Need clarification on IGP-Metric TLV for LS Link > Attributes in BGP-SPF deployments > > > > Hi Acee, > > > > Sure. If anyone doesn't prefer any other way we can proceed with this. > > > > Thanks > > -Pushpasis > > > > > > On Sat, Mar 21, 2020 at 7:49 PM Acee Lindem (acee) wrote= : > > Hi Pushpais, > > I think we can get away with this w/o modifying RFC 7752 since, as you > noted, it just says it is variable. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Saturday, March 21, 2020 at 10:15 AM > *To: *Acee Lindem > *Cc: *"draft-ietf-lsvr-bgp-spf@ietf.org" , > "lsvr@ietf.org" > *Subject: *Re: Need clarification on IGP-Metric TLV for LS Link > Attributes in BGP-SPF deployments > > > > Hi Acee, > > > > I thought RFC7752 says it is a variable length TLV. 1-byte, 2-byte, and > 3-byte metrics are possible lengths. Can't we add a 4th possible length v= ia > this draft? If not then a new TLV may be a better option. > > > > However if I remember correctly, there is a RFC7752 bis being worked upon= . > Is there an option we can add it in that document? Not sure if it will be= a > proper way or not. Just thinking out loud :) > > > > Thanks > > -Pushpasis > > > > > > On Sat, Mar 21, 2020 at 7:17 PM Acee Lindem (acee) wrote= : > > Hi Pushpasis, > > If we use a length of 4, we=E2=80=99d need a new TLV (or modify RFC 7752)= . I think > the former would be a better option. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Saturday, March 21, 2020 at 9:00 AM > *To: *Acee Lindem > *Cc: *"draft-ietf-lsvr-bgp-spf@ietf.org" , > "lsvr@ietf.org" > *Subject: *Re: Need clarification on IGP-Metric TLV for LS Link > Attributes in BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem = , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Saturday, March 21, 2020 at 9:00 AM > > > > Hi Acee, > > > > My personal preference will be having it as a 4-byte metric due to ease o= f > implementation as well as encoding/decoding efficiency due word-size > alignment. It may not be a big thing but encoding/decoding a 3-byte value > to/from byte stream is few more CPU instructions than just a 4-byte read > from a memory address. > > > > Thanks > > -Pushpasis > > > > On Sat, Mar 21, 2020 at 12:10 AM Acee Lindem (acee) > wrote: > > Hi Pushpasis, > > I think for BGP-LS SPF we should always use 3 octet metrics. This will > offer the most flexibility w/o redefining the TLV. If you agree, I will > update the SPF draft to state this. > > Thanks, > > Acee > > > > *From: *Pushpasis Sarkar > *Date: *Monday, March 9, 2020 at 11:31 AM > *To: *"draft-ietf-lsvr-bgp-spf@ietf.org" > > *Cc: *"lsvr@ietf.org" > *Subject: *Need clarification on IGP-Metric TLV for LS Link Attributes in > BGP-SPF deployments > *Resent-From: * > *Resent-To: *Keyur Patel , Acee Lindem = , > Shawn Zandi , Wim Henderickx < > wim.henderickx@nokia.com> > *Resent-Date: *Monday, March 9, 2020 at 11:31 AM > > > > Hi Authors, > > > > I need a small clarification on how the Link IGP-Metric TLV (type 1095) > for the links originated by an BGP-SPF speaker look like. My doubt is > specifically on what would be the length of the metric value. For example= , > following is the excerpt from RFC7752 section 3.3.2.4 which specifies the > length to be 1, 2 or 3 bytes for ISIS narrow-metrics, OSPF and ISIS > wide-metrics. > > > > 3.3.2.4. IGP Metric TLV > > > > The IGP Metric TLV carries the metric for this link. The length of > > this TLV is variable, depending on the metric width of the underlying > > protocol. IS-IS small metrics have a length of 1 octet (the two most > > significant bits are ignored). OSPF link metrics have a length of 2 > > octets. IS-IS wide metrics have a length of 3 octets. > > > > 0 1 2 3 > > 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > | Type | Length | > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > // IGP Link Metric (variable length) // > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > > > Figure 21: IGP Metric TLV Format > > > > What should be the length of the metric field when the origin is a BGP-SP= F > speaker? > > > > Looking forward to your clarification on this. Also it will be appreciate= d > a lot if a sentence or two can be added to the draft clarifying the above > in the next version. > > > > Thanks and regards, > > -Pushpasis > > > > --00000000000031befe05a1c7d4d5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Acee,=C2=A0

Thanks a lot for taking = care of this.

Best regards
-Pushpasis


On Tue, Mar 24, 2020 at 8:18 PM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpasis, et al,

This is clarified in the -08 version of the draft.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <= pushpasis.iet= f@gmail.com>
Date: Sunday, March 22, 2020 at 11:43 AM
To: Acee Lindem <acee@cisco.com>
Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org>
Subject: Re: Need clarification on IGP-Metric TLV for LS Link Attrib= utes in BGP-SPF deployments

=C2=A0

Hi Acee,=C2=A0

=C2=A0

Sure. If anyone doesn= 9;t prefer any other way we can proceed with this.

=C2=A0

Thanks

-Pushpasis=

=C2=A0

=C2=A0

On Sat, Mar 21, 2020 at = 7:49 PM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpais,

I think we can get away with this w/o modifying RFC 7752 since, as you note= d, it just says it is variable.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <pushpasis.ietf@gmail.com> Date: Saturday, March 21, 2020 at 10:15 AM
To: Acee Lindem <acee@cisco.com>
Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org&g= t;
Subject: Re: Need clarification on IGP-Metric TLV for LS Link Attrib= utes in BGP-SPF deployments

=C2=A0

Hi Acee,=C2=A0

=C2=A0

I thought RFC7752 says it is a variable length TLV. 1-byte, 2-byte, and 3-b= yte metrics are possible lengths. Can't we add a 4th possible length vi= a this draft? If not then a new TLV may be a better=C2=A0option.=C2=A0

=C2=A0

However if I remember correctly, there is a RFC7752 bis being worked upon. = Is there an option we can add it in that document? Not sure if it will be a= proper way or not. Just thinking out loud :)

=C2=A0

Thanks

-Pushpasis

=C2=A0

=C2=A0

On Sat, Mar 21, 2020 at 7:17 PM Acee Lindem (acee) <acee@cisco.com> wrote:=

Hi Pushpasis,

If we use a length of 4, we=E2=80=99d need a new TLV (or modify RFC 7752). = I think the former would be a better option.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <pushpasis.ietf@gmail.com> Date: Saturday, March 21, 2020 at 9:00 AM
To: Acee Lindem <acee@cisco.com>
Cc: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>, "lsvr@ietf.org" <lsvr@ietf.org&g= t;
Subject: Re: Need clarification on IGP-Metric TLV for LS Link Attrib= utes in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Saturday, March 21, 2020 at 9:00 AM

=C2=A0

Hi=C2=A0Acee,=C2=A0

=C2=A0

My personal preference will be having it as a 4-byte metric due to ease of = implementation as well as encoding/decoding efficiency due word-size alignm= ent. It may not be a big thing but encoding/decoding a 3-byte value to/from= byte stream is few more CPU instructions=C2=A0than just a 4-byte read from a memory address.=C2=A0

=C2=A0

Thanks

-Pushpasis

=C2=A0

On Sat, Mar 21, 2020 at 12:10 AM Acee Lindem (acee) <acee@cisco.com> wrote:

Hi Pushpasis,

I think for BGP-LS SPF we should always use 3 octet metrics. This will offe= r the most flexibility w/o redefining the TLV. If you agree, I will update = the SPF draft to state this.

Thanks,

Acee

=C2=A0

From: Pushpasis Sarkar <pushpasis.ietf@gmail.com> Date: Monday, March 9, 2020 at 11:31 AM
To: "draft-ietf-lsvr-bgp-spf@ietf.org" <draft-ietf-lsvr-bgp-s= pf@ietf.org>
Cc: "lsvr@ie= tf.org" <lsv= r@ietf.org>
Subject: Need clarification on IGP-Metric TLV for LS Link Attributes= in BGP-SPF deployments
Resent-From: <alias-bounces@ietf.org>
Resent-To: Keyur Patel <keyur@arrcus.com>, Acee Lindem <acee@cisco.com>, Shawn Zandi <szandi@linkedin.com>, Wim Henderickx <wim.henderickx@nokia.com>
Resent-Date: Monday, March 9, 2020 at 11:31 AM<= /p>

=C2=A0

Hi Authors,

=C2=A0

I need a small clarification on how the Link IGP-Metric TLV (type 1095) for= the links originated=C2=A0by an BGP-SPF speaker look like. My doubt is spe= cifically on what would be the length of the metric value. For=C2=A0example= , following is the excerpt from RFC7752 section 3.3.2.4 which specifies the length to be 1, 2 or 3 bytes for ISIS narrow-m= etrics, OSPF and ISIS wide-metrics.=C2=A0

=C2=A0

3.3.2.4.=C2=A0 IGP Metric TL=
V
=C2=A0<=
/pre>

=C2=A0=C2=A0 The IGP Metric =
TLV carries the metric for this link.=C2=A0 The length of<=
/u>


=C2=A0=C2=A0 this TLV is var=
iable, depending on the metric width of the underlying=



=C2=A0=C2=A0 protocol.=C2=A0=
 IS-IS small metrics have a length of 1 octet (the two most


=C2=A0=C2=A0 significant bit=
s are ignored).=C2=A0 OSPF link metrics have a length of 2=



=C2=A0=C2=A0 octets.=C2=A0 I=
S-IS wide metrics have a length of 3 octets.


=C2=A0<=
/pre>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 3


=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1<=
u>


=C2=A0=C2=A0=C2=A0=C2=A0 +-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0=C2=A0=C2=A0=C2=A0 |=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 Type=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 Length=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 |


=C2=A0=C2=A0=C2=A0=C2=A0 +-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0=C2=A0=C2=A0=C2=A0 //=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 IGP Link Metric (variable length)=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 //


=C2=A0=C2=A0=C2=A0=C2=A0 +-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


=C2=A0<=
/pre>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 Figure 21: IGP Metric TLV Format

=C2=A0

What should be the length of the metric field when the origin is a BGP-SPF = speaker?=C2=A0

=C2=A0

Looking forward to your clarification on this. Also it will be appreciated = a lot if a sentence or two can be added to the draft clarifying the above i= n the next version.

=C2=A0

Thanks and regards,

-Pushpasis

=C2=A0

--00000000000031befe05a1c7d4d5-- From nobody Sun Mar 29 14:42:10 2020 Return-Path: X-Original-To: lsvr@ietfa.amsl.com Delivered-To: lsvr@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3ABB93A0D7D for ; Sun, 29 Mar 2020 14:42:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.198 X-Spam-Level: X-Spam-Status: No, score=-0.198 tagged_above=-999 required=5 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yahoo.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 7uWNECcy23lD for ; Sun, 29 Mar 2020 14:42:07 -0700 (PDT) Received: from sonic316-12.consmr.mail.bf2.yahoo.com (sonic316-12.consmr.mail.bf2.yahoo.com [74.6.130.122]) (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 53A043A0D7B for ; Sun, 29 Mar 2020 14:42:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1585518126; bh=yPtx63oguoIPH3/c4up+K2XO2KMQf4mV28ZIwv3qv14=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=UfQCPY92FcUEykZngOLuPUuVhX4N1WyRe7G4fErHUwtLWdYST5z2lYpe/z1mRz44Ms5u9UpfGp9ZSf4SgrO8WZ0eY+khuYLEFcaOZmx/aw98TuSOu9tuRXJ8DXtImEHOiH+C/T8JrGeEsmsip8ZTiygb6wCUfxHvh9HVmMAyJEKbORDlWTZrimrwP28IGFed5N0rJ0unhPrE6BVDHdUYs91F/GFGoEMF7HlCKUrYf5Spn6QcuyRHamB2PRTTXTnAPtRvfYmgYeUIXyGwrPKB2kdoHvEH40HouijNv4zQKBOwXF2MxA/ELnN6PqFBw02hNR2n6QaNPLD46uYAjeUveQ== X-YMail-OSG: J2hEpBMVM1ms5keOexIcHXnH87dbbafGmLvVRIfQUqmsOndLpcMSzWZeglM8GY1 TDJ88JkfAHXBLvey6O8ZnLiTkQ8YaoEu6FWJ5V8qyu3F.OiKd4N2tVeRsxAEZGmSBNTPBePgd4A8 mwesnU9gcpsWmnImdhTMOmtkuzcZRsLSgxsy4g5QlkjLoEtns4Z.d9BpIIJPo56V1NfXTq.F3F.l ppahAWZcbx3VvGUlZZn6CuuEflzwKedigfKzPTHcYK5qTsIP4JVFwIyNBUCzeTMBmqW75_Fvse.V 4LZgj1uTXjxoxSZvY_z7DS13MtwZRzsebsFnXGB_yiXogIWxnHszYpKlFiQo6jXo7Sd04FTYlIiU OgBI_UJV1xrGywjrdkmk5x1iWda8h3T0xcQbZswa.mqCnLdvT7neMsysh_p4RnAwnD2T7lIKYRcN Wa7i3xTbWkaj7CzO8w9vXwZw7hKuADlebwMKcWrtXe59RnBuXbNyJELvdWcHtirgdqQ3jgfWQUgZ CPgTb9Q_FNLNrevIToatDlyEg9Q6SX_CHssf7QdqW8cDMFz_37M.dD6UEsUy.C57UiVIszwF3ec1 BrnH.Vy_4APssap8hL3liLgz87fAzhAnLe1ijUnfH2P3jUV.kKvHfxlCsSBnFjI3zjuUBCD6PPzR 6cs4eEFA.Q7rLZNFceUmrVE.givdu6ypOTiGpYYxvMEiC5Rav7_3deBFOa3RjQMtKZLfJZfH8ex8 BWVQJNKMI_GLAhk_dNPb6Ve3R0H54dbnnUMEng3DQUdp5izgCjnba7RqNhCUr20jKcEVx5p9phAb 1n_sv8IUjqp1tMxSKC5pFf2legzFtTvGZ2tmJczOknFJFP6194N6Z9YV1LN_lg6bh5YrdOi9ee9x sSP_QusdIf3812pE_p2vCOO_7GwqqMCvvctCi1F6Qp1xtLUJ6Up1CmKSbc80v7cTLTF8SYK4QwOP DIiDGD0Y9stQfkbT90cqDHwUyA3bRBjWYm3UDaFQRTHCwP2wBH7c3KhgXw7DaHBYwO44lhrOGSp6 5qmhtXGOXMFMk0WHrI7gfrdp2_Vs5o2cnE_mp7KTyLGU_N8KT6_nIclfQyAtHlRsWJTxF41X9PQz 143XcF00aRETFurVU3EvEY8Ht7ISUaGIijxj9OoKWjQ9immjFRFeSXR6JMWGjOh7HaKNvMK.QanW AAL3rZ9MXnPfBGwl1xcP_kQSQq8zpEREaezYzCdZ2qCn9M_hxo4Woh3ZjxMPKD1RZ6M5yieGMrAU 88vXDYWSrc0XmF.zs2sPQAV_dt7aRD02VDPY0oRE9dYlzJt2JEjl_1uSTXRs.wAJzmqlh61oZQbr q21mm9Ni4JnMvXre4AkmiPPiNmw-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic316.consmr.mail.bf2.yahoo.com with HTTP; Sun, 29 Mar 2020 21:42:06 +0000 Date: Sun, 29 Mar 2020 21:42:04 +0000 (UTC) From: Boris Hassanov To: Keyur Patel , Boris Hassanov , "lsvr@ietf.org" , "Van De Velde, Gunter (Nokia - BE/Antwerp)" , "Acee Lindem (acee)" Message-ID: <183522699.483232.1585518124609@mail.yahoo.com> In-Reply-To: <93CD7CD4-C50B-40F2-B9BB-7C8D018254DC@cisco.com> References: <513025242.9878512.1579620926598@mail.yahoo.com> <077EC01A-0CE6-411D-98D2-B7689D11B071@arrcus.com> <93CD7CD4-C50B-40F2-B9BB-7C8D018254DC@cisco.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_483231_737025343.1585518124605" X-Mailer: WebService/1.1.15555 YMailNorrin Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:74.0) Gecko/20100101 Firefox/74.0 Archived-At: Subject: Re: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to end January 21, 2020) X-BeenThere: lsvr@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Link State Vector Routing List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 29 Mar 2020 21:42:09 -0000 ------=_Part_483231_737025343.1585518124605 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Acee and all,Thank you. Hope that you all are okay. Yes, I read the new version, some comments are below:6.1.1 says: "Rather, a= dditional NLRI attributes can be advertised in the BGP-LS SPF AFI/SAFI as r= equired."=C2=A0 IMO, some examples of such attributes are needed after that= . 6.2.1 "However, this use case is not very useful since parallel layer-3 lin= ks between the same two BGP routers are rare in CLOS or Fat-Tree topologies= ." IMO, would be good to change as "...the two BGP routers of the same leve= l (leaf-leaf, spine-spine)"I would also add some diagram here showing examp= le of Sparse Peering model. 6.3 BGP Spine/Leaf Topology Policy This paragraph does not say much about - what kind of policy is needed, why= etc.There is the statement that BGP policy can be applied at any level, th= at it is not needed to advertise BGP-LS NLRI in northbound direction from l= eaves to spine and an example. May be I just did not get it, but what is the main message here about topol= ogy policy? 6.5.1 Peer discovery - cannot comment now, need to read those 3 drafts.6.5.= 2 -yes, agree6.5.3 - I would change from:"This would normally be done on a = central controller but distributed consistency checking is not precluded." = to "This would normally be done on central controller or other management t= ool which can be used for fabric data paths verification." SY,Boris On Wednesday, March 25, 2020, 12:34:28 AM GMT+3, Acee Lindem (acee) wrote: =20 =20 =20 Hi Boris,=20 =20 Please take a look at the -05 version. I=E2=80=99ve incorporated your comme= nts. =20 Thanks, =20 Acee =20 =C2=A0 =20 From:Lsvr on behalf of Keyur Patel Date: Tuesday, January 21, 2020 at 10:45 PM To: Boris Hassanov , "lsvr@ietf.org= " , Gunter Van de Velde Subject: Re: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to end Janua= ry 21, 2020) =20 =C2=A0 =20 Hi Boris, =20 =C2=A0 =20 Thanks for your comments and detail review.=F0=9F=98=8A =20 =C2=A0 =20 Ack on all three. We will cover it in next revision. =20 =C2=A0 =20 Regards, =20 Keyur =20 =C2=A0 =20 From:Lsvr on behalf of Boris Hassanov Date: Tuesday, January 21, 2020 at 7:35 AM To: "lsvr@ietf.org" , "Van De Velde, Gunter (Nokia - BE/Antw= erp)" Subject: Re: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to end Janua= ry 21, 2020) =20 =C2=A0 =20 Hi Gunter and all, =20 =C2=A0 =20 Sorry for the late reply. =20 I read the draft and personally support its publication. =20 =C2=A0 =20 Few comments for the next updated version: =20 1) The References part needs to be updated since there are newer versions o= f those drafts are available. =20 2)=C2=A0 Can RFC 5549 approach be incorporated for simplification of BGP co= nnected graph configuration and creation? There is example of such implemen= tation=C2=A0 for kind of BGP unnumbered peering configuration so it could b= e useful here too, IMO. =20 3) I think that LSVR/BGP-LS SPF has another very important use case: using = of=C2=A0 of real topology information of CLOS network for monitoring and tr= oubleshooting instead of using home-made tools for topology verification...= Can we extend the draft for such case in the the next version? =20 =C2=A0 =20 Thanks. =20 =C2=A0 =20 SY, =20 Boris =20 =C2=A0 =20 =C2=A0 =20 =C2=A0 =20 =C2=A0 =20 On Thursday, January 16, 2020, 9:45:40 AM GMT+3, Van De Velde, Gunter (Noki= a - BE/Antwerp) wrote: =20 =C2=A0 =20 =C2=A0 =20 Tuesday 21 January is approaching soon. =20 If you read the draft, please post your comments on document readiness and = completeness. =20 =C2=A0 =20 Be well, =20 G/ =20 =C2=A0 =20 From: Lsvr On Behalf Of Van De Velde, Gunter (Nokia = - BE/Antwerp) Sent: Tuesday, January 7, 2020 16:39 To: lsvr@ietf.org Subject: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to end January 2= 1, 2020) =20 =C2=A0 Hi All, =C2=A0 =C2=A0 The LSVR WG initiates a working group last call fo= r "draft-ietf-lsvr-applicability-04". Please send your comments to the list= before Tuesday January 21. =C2=A0 https://datatracker.ietf.org/doc/draft-= ietf-lsvr-applicability/ =C2=A0 All, please reply on-list indicating if yo= u're aware of an implementation. If not already completed, please reply on-= list indicating if you're aware of any relevant IPR. =C2=A0 Brgds, Gunter = & Victor LSVR WG co-chairs=20 =C2=A0 =20 _______________________________________________ Lsvr mailing list Lsvr@ietf.org https://www.ietf.org/mailman/listinfo/lsvr _______________________________________________ Lsvr mailing list Lsvr@ietf.org https://www.ietf.org/mailman/listinfo/lsvr ------=_Part_483231_737025343.1585518124605 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Acee and all,
Thank you. = Hope that you all are okay.

=
Yes, I read the new version, some comments are below:
6.1.1 says: "Rathe= r, additional NLRI attributes can be advertised in the BGP-LS SPF AFI/SAFI = as required."  IMO, some examples of such attributes are needed after = that.

6.2.1 "However, this use case is not very useful si= nce parallel layer-3 links between the same two BGP routers are rare in CLO= S or Fat-Tree topologies." IMO, would be good to change as "...the tw= o BGP routers of the same level (leaf-leaf, spine-spine)"
I would also add some diagram here = showing example of Sparse Peering model.

6.3 BGP Spine/Leaf Topology Po= licy

This paragr= aph does not say much about - what kind of policy is needed, why etc.
=
There is the statement that BGP poli= cy can be applied at any level, that it is not needed to advertise BG= P-LS NLRI in northbound direction from leaves to spine and an example.
May be I just did not = get it, but what is the main message here about topology policy?

6.5.1 Peer discovery - cannot comm= ent now, need to read those 3 drafts.
6.5.2 -yes, agree
6.5.3 = - I would change from:"This would normally be done on a central controller = but distributed consistency checking is not precluded." to "This would norm= ally be done on central controller or other management tool which can be us= ed for fabric data paths verification."

SY,
Boris

=20
=20 =20
On Wednesday, March 25, 2020, 12:34:28 AM GMT+3, Acee L= indem (acee) <acee=3D40cisco.com@dmarc.ietf.org> wrote:


Hi Boris,

=20

Please take a look at the -0= 5 version. I=E2=80=99ve incorporated your comments.

=20

Thanks,

=20

Acee

=20

 

=20

= From: Lsvr <lsvr-boun= ces@ietf.org> on behalf of Keyur Patel <keyur@arrcus.com>
Date: Tuesday, January 21, 2020 at 10:45 PM
To: Boris Hassanov <bhassanov=3D40yahoo.com@dmarc.ietf.org>, "= lsvr@ietf.org" <lsvr@ietf.org>, Gunter Van de Velde <gunter.van_de= _velde@nokia.com>
Subject: Re: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to en= d January 21, 2020)

=20

=  

=20

= Hi Boris,

=20

=  

=20

= Thanks for your comments and detail review. =F0=9F=98=8A

=20

=  

=20

= Ack on all three. We will cover it in next revision.

=20

=  

=20

= Regards,

=20

= Keyur

=20

=  

=20

= From: Lsvr <lsvr-boun= ces@ietf.org> on behalf of Boris Hassanov <bhassanov=3D40yahoo.com@dm= arc.ietf.org>
Date: Tuesday, January 21, 2020 at 7:35 AM
To: "lsvr@ietf.org" <lsvr@ietf.org>, "Van De Velde, Gunter (No= kia - BE/Antwerp)" <gunter.van_de_velde@nokia.com>
Subject: Re: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to en= d January 21, 2020)

=20

=  

=20

= Hi Gunter and all,

=20

=  

=20

= Sorry for the late reply.

=20

= I read the draft and personally support i= ts publication.

=20

=  

=20

= Few comments for the next updated version= :

=20

= 1) The References part needs to be update= d since there are newer versions of those drafts are available.

= =20

= 2)  Can RFC 5549 approach be incorpo= rated for simplification of BGP connected graph configuration and creation?= There is example of such implementation  for kind of BGP unnumbered peering configuration so it could be useful her= e too, IMO.

=20

= 3) I think that LSVR/BGP-LS SPF has anoth= er very important use case: using of  of real topology information of = CLOS network for monitoring and troubleshooting instead of using home-made tools for topology verification... Can we exten= d the draft for such case in the the next version?

=20

=  

=20

= Thanks.

=20

=  

=20

= SY,

=20

= Boris

=20

=  

=20

=  

=20

=  

=20

=  

=20

= On Thursday, January 16, 2020, 9:45:40 AM= GMT+3, Van De Velde, Gunter (Nokia - BE/Antwerp) <gunter.van_de_velde@n= okia.com> wrote:

=20

=  

=20

=  

=20

Tuesday 21 January= is approaching soon.

=20

If you read the dr= aft, please post your comments on document readiness and completeness.

=20

 

= =20

Be well,=20

G/

=20

 

= =20

From: Lsvr <lsvr-bounces@ietf.org> On Behalf Of Van De Velde, Gunter (Nokia - BE/Antwerp)
Sent: Tuesday, January 7, 2020 16:39
To: lsvr@ietf.org
Subject: [Lsvr] WGLC for draft-ietf-lsvr-applicability-04 (to end Ja= nuary 21, 2020)

=20

 

= =20 
Hi All,
=20 
  
=20 
  
=20 
The LSVR WG initiates a working group last call for "draft-ietf-lsv=
r-applicability-04". Please send your comments to the list before Tuesday J=
anuary 21.
=20 
  
=20 
https://datatracker.ietf.org/doc/draft-ietf-lsvr-appl=
icability/
=20 
  
=20 
All, please reply on-list indicating if you're aware of an implemen=
tation.
=20 
If not already completed, please reply on-list indicating if you're=
 aware of any relevant IPR.
=20 
  
=20 
Brgds,
=20 
Gunter & Victor
=20 
LSVR WG co-chairs
=20

 

= =20

= _________________________________________= ______
Lsvr mailing list
Lsvr@ietf.org
https://www.ietf.org/mailman/listinfo/lsvr<= /a>

=20
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