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

Hi Xiaohu,

Please see inline [Bruno]

From: Lsr [mailto:lsr-bounces@ietf.org] On Behalf Of ???(??)
Sent: Thursday, September 12, 2019 3:51 AM
To: Lsr; Peter Psenak; Acee Lindem (acee); lsr@ietf.org; draft-ietf-isis-mpls-elc@ietf.org
Cc: mpls@ietf.org; lsr-ads@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

Hi Bruno,

It's the ELC which is used to determine the POSSIBLE position of inserting the EL in the stack, meanwhile, it's the ERLC  which is
used to determine the necessity of inserting an EL at any possible position of the EL except the deepest position.

[Bruno] I agree, but I don’t see any inconsistency between the above and my comment.
Note: “ERLC” is not defined in this document. I ‘m assuming that you mean :s/ERLC/ERLD (although :s/ERLC/ELC would equally be a single letter typo)

Hence, the OLD definition of the ERLC seems more straightforward, IMHO.

[Bruno] That’s not my opinion but I can surely live with both. As I had previously stated  I clearly leave the choice to the editor. (“Please feel free to silently  discard. »)
That been said, my comment was purely editorial and does not change the meaning (the proposed change was :s/ different depth/ different position in the label stack). Interestingly, in your above comment you also use the term “position”.

Best regards,
--Bruno

Best regards,
Xiaohu

------------------------------------------------------------------
From:bruno.decraene <bruno.decraene@orange.com>
Send Time:2019年9月2日(星期一) 22:33
To:Peter Psenak <ppsenak@cisco.com>; 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>
Cc:mpls@ietf.org <mpls@ietf.org>; lsr-ads@ietf.org <lsr-ads@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

Hi Peter,

Thanks, looks good.

--Bruno

-----Original Message-----
From: Peter Psenak [mailto:ppsenak@cisco.com]
Sent: Monday, September 2, 2019 1:04 PM
To: DECRAENE Bruno TGI/OLN; Acee Lindem (acee); lsr@ietf.org; draft-ietf-isis-mpls-elc@ietf.org
Cc: mpls@ietf.org; lsr-ads@ietf.org
Subject: Re: Working Group Last Call for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using ISIS" - draft-ietf-isis-mpls-elc-07

Hi Bruno,

On 02/09/2019 11:59, bruno.decraene@orange.com wrote:
> 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.

What about the slightly modified wording:

"This capability, referred to as Entropy Readable Label Depth (ERLD) as
defined in <xref target="I-D.ietf-mpls-spring-entropy-label"/> may be
used by ingress LSRs determine the position of the EL in the stack, and
whether it's necessary to insert multiple ELs at different position in
the label stack."

>
> §7Security 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.

done.

thanks,
Peter
>
> 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
> 14^th , 2014. Also, review comments are certainly welcome.
>
> Thanks,
> Acee
>
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_________________________________________________________________________________________________________________________

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a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
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This message and its attachments may contain confidential or privileged 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 and delete this message and its attachments.
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Thank you.