From nobody Mon May 17 10:00:21 2021 Return-Path: X-Original-To: mpls@ietfa.amsl.com Delivered-To: mpls@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5EBAD3A3FF6 for ; Mon, 17 May 2021 10:00:19 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.093 X-Spam-Level: X-Spam-Status: No, score=-2.093 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, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_BLOCKED=0.001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=sergey.dev 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 DIVUCtM2o_4B for ; Mon, 17 May 2021 10:00:14 -0700 (PDT) Received: from forward103j.mail.yandex.net (forward103j.mail.yandex.net [5.45.198.246]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 936AE3A3FF3 for ; Mon, 17 May 2021 10:00:14 -0700 (PDT) Received: from myt5-8d25db0e1b73.qloud-c.yandex.net (myt5-8d25db0e1b73.qloud-c.yandex.net [IPv6:2a02:6b8:c12:12b:0:640:8d25:db0e]) by forward103j.mail.yandex.net (Yandex) with ESMTP id 9FBFC6741A8F; Mon, 17 May 2021 20:00:11 +0300 (MSK) Received: from myt4-1dda227af9a8.qloud-c.yandex.net (myt4-1dda227af9a8.qloud-c.yandex.net [2a02:6b8:c00:3c83:0:640:1dda:227a]) by myt5-8d25db0e1b73.qloud-c.yandex.net (mxback/Yandex) with ESMTP id O1f9O26gEg-0BKeA9he; Mon, 17 May 2021 20:00:11 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sergey.dev; s=mail; t=1621270811; bh=aY4uc/TUUKujsH6YnPBWR14MmkBMmWls+l31c1iPn0I=; h=Subject:Date:References:To:From:Message-ID:In-Reply-To; b=Yi6jw/anyGd2nABf1VjrznUrqF+9rdWFEqZTD5Gc9U2fASEml59LMg70rO/N9hvqq jj8+EPhj/xoSmJH7ISNWVNR1cJW9Zf5fBVAWec0QXd1R+bIlOZJNtI3RV9Dw7fK3yG 3Syb7jUBJve/+bNnuPfnoYQfPV+3lWxTLyEiOc2Q= Authentication-Results: myt5-8d25db0e1b73.qloud-c.yandex.net; dkim=pass header.i=@sergey.dev Received: by myt4-1dda227af9a8.qloud-c.yandex.net (smtp/Yandex) with ESMTPSA id IojwVaVH6F-08LKsTv3; Mon, 17 May 2021 20:00:10 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) From: "Sergey Fomin" To: "'Jeff Tantsura'" , "'mpls'" , "'loa Andersson'" , "'Stewart Bryant'" References: <161968317610.20664.11107844270215068679@ietfa.amsl.com> <0be3c175-1145-4c9d-a889-fa85d5732ec2@Spark> In-Reply-To: <0be3c175-1145-4c9d-a889-fa85d5732ec2@Spark> Date: Mon, 17 May 2021 10:00:06 -0700 Message-ID: <00db01d74b3e$18767170$49635450$@sergey.dev> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00DC_01D74B03.6C192010" X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQGvQUfijzxX4zVhvp6ppEZJ9RUgGAFQ9rM4AiyLOVerHAzSgA== Content-Language: en-us Archived-At: Subject: Re: [mpls] I-D Action: draft-andersson-mpls-open-dt-questions-00.txt X-BeenThere: mpls@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Multi-Protocol Label Switching WG List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 May 2021 17:00:20 -0000 This is a multipart message in MIME format. ------=_NextPart_000_00DC_01D74B03.6C192010 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi Jeff, =20 > ERLD(Entropy Readable Label Depth)-MSD is defined in = draft-ietf-isis-mpls-elc and should be used to advertise readable label = stack depth. Not in a general case though. As you may remember, there were quite a few discussions around the = definition of RLD/ERLD for rfc8662 & drafts isis/ospf-mpls-elc, and the = (rough) consensus settled on a strict, application specific definition & = usage of ERLD, not a generic RLD. =20 -- Sergey From: mpls On Behalf Of Jeff Tantsura Sent: Thursday, May 13, 2021 8:31 PM To: mpls ; loa Andersson ; Stewart Bryant = Subject: Re: [mpls] I-D Action: = draft-andersson-mpls-open-dt-questions-00.txt =20 Loa, RFC8491/RFC8476/RFC8814 provide IGP/BGP-LS framework to signal HW = capabilities wrt abilities to push/read label stacks. Please use common terminology - read instead of scan. ERLD(Entropy Readable Label Depth)-MSD is defined in = draft-ietf-isis-mpls-elc and should be used to advertise readable label = stack depth. =20 =20 Cheers,=20 Jeff On Apr 29, 2021, 3:26 AM -0700, Stewart Bryant >, wrote: 2.1.3. Does flooding om maximum scanning depth of an LSR scale? A remedy for the issues in Section 2.1.1 has been suggested, the maaximum scanning depth for each LSR in the network should be flooded to all othr LSRs and used as a constraint when setting up LSPs. Would that scale satisfactorily. Hi Loa That is a duplicate of 2.1.2 and I think we can answer that as yes. It is one additional capability field (no more than a byte) to flood and = I find it hard to imagine that it would not scale. Best regards - Stewart On 29 Apr 2021, at 08:59, internet-drafts@ietf.org = wrote: A New Internet-Draft is available from the on-line Internet-Drafts = directories. Title : MPLS Open Design Team Questions Author : Loa Andersson Filename : draft-andersson-mpls-open-dt-questions-00.txt Pages : 4 Date : 2021-04-29 Abstract: This document is a living document, meaning that during the life timme of the MPLS Open Design Team we will put additonal questions/ issues into the document. When we find an answer amd a way to document the issu it will be removed from this document. Ideally when the Design Team is closed this document will be empty, or maybe we just add a pointer to where the answer to quesstion is documented. Thus this document will never go on to become an RFCc. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-andersson-mpls-open-dt-questions/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-andersson-mpls-open-dt-questions-00 https://datatracker.ietf.org/doc/html/draft-andersson-mpls-open-dt-questi= ons-00 Please note that it may take a couple of minutes from the time of = submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ _______________________________________________ I-D-Announce mailing list I-D-Announce@ietf.org =20 https://www.ietf.org/mailman/listinfo/i-d-announce Internet-Draft directories: http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt _______________________________________________ mpls mailing list mpls@ietf.org =20 https://www.ietf.org/mailman/listinfo/mpls ------=_NextPart_000_00DC_01D74B03.6C192010 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Hi Jeff,

 

> ERLD(Entropy Readable Label = Depth)-MSD  is defined in draft-ietf-isis-mpls-elc and should = be used to advertise readable label stack depth.

Not in a general case though.

As you may remember, there were quite a few = discussions around the definition of RLD/ERLD for rfc8662 & drafts = isis/ospf-mpls-elc, and the (rough) consensus settled on a strict, = application specific definition & usage of ERLD, not a generic = RLD.

 

--

Sergey

From: mpls = <mpls-bounces@ietf.org> On Behalf Of Jeff = Tantsura
Sent: Thursday, May 13, 2021 8:31 PM
To: = mpls <mpls@ietf.org>; loa Andersson <loa@pi.nu>; Stewart = Bryant <stewart.bryant@gmail.com>
Subject: Re: [mpls] = I-D Action: = draft-andersson-mpls-open-dt-questions-00.txt

<= p class=3DMsoNormal> 

Loa,

RFC8491/RFC8476/RFC8814 provide IGP/BGP-LS = framework to signal HW capabilities wrt abilities to push/read label = stacks.

Please use common terminology - read instead of = scan.
ERLD(Entropy Readable Label Depth)-MSD  is defined in = draft-ietf-isis-mpls-elc and should be used to advertise readable label = stack depth.
 

 

Cheers, =

Jeff

On Apr 29, 2021, 3:26 AM = -0700, Stewart Bryant <stewart.bryant@gmail.com>= , wrote:



2.1.3. Does flooding om maximum = scanning depth of an LSR scale?

A remedy for the issues in = Section 2.1.1 has been suggested, the
maaximum scanning depth for = each LSR in the network should be flooded
to all othr LSRs and used = as a constraint when setting up LSPs.

Would that scale = satisfactorily.

Hi Loa

That is a duplicate of 2.1.2 and I = think we can answer that as yes.

It is one additional capability = field (no more than a byte) to flood and I find it hard to imagine that = it would not scale.

Best regards

- = Stewart






On = 29 Apr 2021, at 08:59, internet-drafts@ietf.org = wrote:


A New Internet-Draft is available from the on-line = Internet-Drafts directories.


Title : MPLS Open Design Team = Questions
Author : Loa Andersson
Filename : = draft-andersson-mpls-open-dt-questions-00.txt
Pages : 4
Date : = 2021-04-29

Abstract:
This document is a living document, = meaning that during the life
timme of the MPLS Open Design Team we = will put additonal questions/
issues into the document. When we find = an answer amd a way to
document the issu it will be removed from this = document.

Ideally when the Design Team is closed this document = will be empty,
or maybe we just add a pointer to where the answer to = quesstion is
documented. Thus this document will never go on to = become an RFCc.


The IETF datatracker status page for this = draft is:
https://datatracker.ietf.org/doc/draft-andersson-mpls-open-dt-qu= estions/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-andersson-mpls-open-dt-questions-= 00
https://datatracker.ietf.org/doc/html/draft-andersson-mpl= s-open-dt-questions-00


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

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


_______________________________________________I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.i= etf.org/mailman/listinfo/i-d-announce
Internet-Draft directories: = http://www.ietf.org/shadow.html<= /a>
or ftp://ftp.ietf.org/iet= f/1shadow-sites.txt


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

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