Re: [Pce] [PCE]:New Version Notification for draft-peng-pce-entropy-label-position-05.txt

Hi,

It is the job of ingress router to impose the SID(label) stack that would include one or more pairs of ELI/EL. This is always a subject to MSD limitations (per platform/per LC if applicable). 
The draft is not discussing implications of these limitations , which I find rather unfortunate.

Regards,
Jeff

> On Feb 20, 2021, at 00:15, xiong.quan@zte.com.cn wrote:
> 
> 
> Dear Dhruv,Stephane,Zhenbin Li,Tarek and WG,
> 
> 
> 
> I just submitted a new version of the draft-peng-pce-entropy-label-position-05. This draft has been presented in IETF 106 and 107. Many thanks for your comments and discussions. 
> 
> 
> 
> First, I think we have the consensus that in case of inter-domain scenario, PCE would be useful for computing both SR path and the placement of entropy labels. We should propose a set of extensions for PCEP.
> 
> 
> 
> Second, I fully agree with that the ingress MUST support the capability of  inserting multiple ELI/ELs and it needs to advertise the capability to PCE. So I think we should add the capability in OPEN message from PCC to PCE. In the current version, we define the E bit for a PCC  to  indicate that it supports the capability of inserting multiple ELI/EL pairs and and supports the results of SR path with ELP from PCE. What is your suggestion? If the E bit is enough? Or should we define the BGP/IGP extension?
> 
> 
> 
> Finally, thanks to Zhenbin, I need to clarify that the ELI/EL pairs are calculated for a specific traffic flow but the placement of the ELI/EL pairs are calculated for a SR-path. In our draft, we propose the PCEs perform computation of SR-path with the the placement of the ELI/EL pairs and the value of ELI/EL pairs are calculated  at the ingress.
> 
> 
> 
> I look forward and appreciate any comment and suggestion from you.
> 
> 
> 
> Thanks,
> 
> Quan
> 
> 
> 
> 
> 
> 主 题 ：New Version Notification for draft-peng-pce-entropy-label-position-05.txt
> 
> A new version of I-D, draft-peng-pce-entropy-label-position-05.txt
> has been successfully submitted by Quan Xiong and posted to the
> IETF repository.
> 
> Name:        draft-peng-pce-entropy-label-position
> Revision:    05
> Title:        PCEP Extension for SR-MPLS Entropy Label Position
> Document date:    2021-02-19
> Group:        Individual Submission
> Pages:        9
> URL:            https://www.ietf.org/archive/id/draft-peng-pce-entropy-label-position-05.txt
> Status:         https://datatracker.ietf.org/doc/draft-peng-pce-entropy-label-position/
> Htmlized:       https://datatracker.ietf.org/doc/html/draft-peng-pce-entropy-label-position
> Htmlized:       https://tools.ietf.org/html/draft-peng-pce-entropy-label-position-05
> Diff:           https://www.ietf.org/rfcdiff?url2=draft-peng-pce-entropy-label-position-05
> 
> Abstract:
>    This document proposes a set of extensions for PCEP to configure the
>    entropy label position for SR-MPLS networks.
> 
>                                                                                    
> 
> 
> 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.
> 
> The IETF Secretariat
> 
> 
> 
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