Re: [mpls] Working Group Last Call for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using ISIS" - draft-ietf-isis-mpls-elc-07

<bruno.decraene@orange.com> Mon, 02 September 2019 09:59 UTC

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From: <bruno.decraene@orange.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>, "draft-ietf-isis-mpls-elc@ietf.org" <draft-ietf-isis-mpls-elc@ietf.org>
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Thread-Topic: Working Group Last Call for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using ISIS" - draft-ietf-isis-mpls-elc-07
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Subject: Re: [mpls] Working Group Last Call for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using ISIS" - draft-ietf-isis-mpls-elc-07
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Support.
This is needed for using MPLS Entropy Label in SR-MPLS.

Please find below some proposed comments. Please feel free to silently discard.
§1 Introduction
OLD:

“This capability, referred to as Entropy

   Readable Label Depth (ERLD) as defined in

   [I-D.ietf-mpls-spring-entropy-label<https://tools.ietf.org/html/draft-ietf-isis-mpls-elc-07#ref-I-D.ietf-mpls-spring-entropy-label>;] may be used by ingress LSRs to

   determine whether it's necessary to insert an EL for a given LSP in

   the case where there has already been at least one EL in the label

   stack [I-D.ietf-mpls-spring-entropy-label<https://tools.ietf.org/html/draft-ietf-isis-mpls-elc-07#ref-I-D.ietf-mpls-spring-entropy-label>].”

NEW:

This capability, referred to as Entropy

   Readable Label Depth (ERLD) as defined in

   [I-D.ietf-mpls-spring-entropy-label<https://tools.ietf.org/html/draft-ietf-isis-mpls-elc-07#ref-I-D.ietf-mpls-spring-entropy-label>;] may be used by ingress LSRs to

   determine the position of the EL label in the stack, and whether it's necessary to insert multiple EL at different depth.



§7 Security Considerations



“This document does not introduce any new security risks.”



Incorrectly setting the E flag (ELC capable) (during origination, propagation, redistribution) may lead to black-holing the traffic on the egress node. I believe this risk should be mentioned.


Regards,
--Bruno
From: Lsr [mailto:lsr-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsberg)
Sent: Monday, September 2, 2019 6:48 AM
To: Acee Lindem (acee); lsr@ietf.org
Cc: mpls@ietf.org; lsr-ads@ietf.org; draft-ietf-isis-mpls-elc@ietf.org
Subject: Re: [Lsr] Working Group Last Call for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using ISIS" - draft-ietf-isis-mpls-elc-07

I support moving forward with these drafts.
There are clearly use cases for this functionality and the solution has been vetted with providers who intend to deploy this.

   Les


From: Lsr <lsr-bounces@ietf.org>; On Behalf Of Acee Lindem (acee)
Sent: Friday, August 30, 2019 12:44 PM
To: lsr@ietf.org
Cc: mpls@ietf.org; lsr-ads@ietf.org; draft-ietf-isis-mpls-elc@ietf.org
Subject: [Lsr] Working Group Last Call for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using ISIS" - draft-ietf-isis-mpls-elc-07

We’ve gone through a number of iterations with these ELC drafts and I believe they are ready and meets all the use case requirements. Note that “Entropy Label for Spring tunnels” – draft-ietf-mpls-spring-entropy-label-12 is on the RFC editor’s queue.
This begins a two week last call for the subject draft. Please indicate your support or objection on this list prior to 12:00 AM UTC on Sept 14th, 2014. Also, review comments are certainly welcome.
Thanks,
Acee

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