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. Hence, the OLD definition of the ERLC seems more straightforward, IMHO.
Best regards, Xiaohu ------------------------------------------------------------------ From:bruno.decraene <[email protected]> Send Time:2019年9月2日(星期一) 22:33 To:Peter Psenak <[email protected]>; Acee Lindem (acee) <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]> Cc:[email protected] <[email protected]>; [email protected] <[email protected]> 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:[email protected]] Sent: Monday, September 2, 2019 1:04 PM To: DECRAENE Bruno TGI/OLN; Acee Lindem (acee); [email protected]; [email protected] Cc: [email protected]; [email protected] 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, [email protected] 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:[email protected]] *On Behalf Of * Les Ginsberg > (ginsberg) > *Sent:* Monday, September 2, 2019 6:48 AM > *To:* Acee Lindem (acee); [email protected] > *Cc:* [email protected]; [email protected]; [email protected] > *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 <[email protected]> *On Behalf Of *Acee Lindem (acee) > *Sent:* Friday, August 30, 2019 12:44 PM > *To:* [email protected] > *Cc:* [email protected]; [email protected]; [email protected] > *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 > > _________________________________________________________________________________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations > confidentielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu > ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages > electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme ou > falsifie. Merci. > > 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. > As emails may be altered, Orange is not liable for messages that have been > modified, changed or falsified. > Thank you. > _________________________________________________________________________________________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. 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. As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. Thank you. _______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr
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