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Re: [mpls] I-D Action: draft-andersson-mpls-open-dt-questions-00.txt

Sergey Fomin <ietf@sergey.dev> Mon, 17 May 2021 17:00 UTC

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From: Sergey Fomin <ietf@sergey.dev>
To: 'Jeff Tantsura' <jefftant.ietf@gmail.com>, 'mpls' <mpls@ietf.org>, 'loa Andersson' <loa@pi.nu>, 'Stewart Bryant' <stewart.bryant@gmail.com>
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Subject: Re: [mpls] I-D Action: draft-andersson-mpls-open-dt-questions-00.txt
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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

 

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 <mailto: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 <mailto: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-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/


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