Re: [spring] Fw:New Version Notification for draft-srcompdt-spring-compression-requirement-01.txt

Stefano Salsano <stefano.salsano@uniroma2.it> Fri, 20 November 2020 05:10 UTC

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From: Stefano Salsano <stefano.salsano@uniroma2.it>
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Subject: Re: [spring] Fw:New Version Notification for draft-srcompdt-spring-compression-requirement-01.txt
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Il 2020-11-15 16:27, 程伟强 ha scritto:
> Hi Group,
> 
> SR compression design team have submitted a new version of compression 
> requirement draft.
> 
> Main changes as follows:
> 
> - added 3 items about scalibility with agreement within the design team
> 
> - added an appendix including 3 items without without unanimous 
> consensus within the design team

Hi all,

the the appendix A of latest draft version includes three items that 
should be taken into consideration, in particular:

Requirement A.2.1.  SRv6 Based
Requirement A.2.2.  SRv6 Functionality

"A solution to compress SRv6 SID Lists SHOULD be based on the SRv6 
architecture, control plane and data plane" and "A solution to compress 
an SRv6 SID list MUST support the functionality of SRv6"

I've been working in the last 4 years on the open source ecosystem 
supporting SRv6, including the support of SRv6 in the Linux kernel
(see https://netgroup.github.io/rose/)

a lot of effort has been spent in this ecosystem that now offers a 
feature set comparable to vendors' implementation of SRv6

it is very important for the research community to have such ecosystem 
and it will be painful to rebuild the support for a new solution outside 
of the current SRv6 architecture... one of the problem of the MPLS 
architecture (from the research comunity point of wiew) was that the 
support in Linux has never been comparable to vendors's solution (e.g. 
for the control plane), for this reason the research work diverged a lot 
from production solutions, I really would like to avoid such gap again

Requirement A.2.3. Heterogeneous SID lists

"The compression proposal SHOULD support a combination of compressed and 
non-compressed segments in a single path."

We have been working a lot on Service Function Chaining supported by 
SRv6, and we have use cases that require non-compressed segments to 
include arbitrary functions in the chain and provide them the needed 
information. It is very important to have the possibility to combine SFC 
with other features (e.g. traffic engineered paths) requiring compressed 
segments in a single "end-to-end" perspective. This would support 
end-to-end scenarios combining for example IoT at the edge, 5G access, 
metro/wan interconnection, SFC in the metro/wan, SFC in datacenter. This 
is only possible if compressed and non-compressed segments are combined.

ciao
Stefano

> 
> - some minor text issue fixed
> 
> Please review it and let us know your comments.
> 
> 
> BTW: We will have 1-hour session for the design team topic on Friday and 
> welcome to join us.
> 
> 
> B.R.
> 
> Weiqiang on behalf of design team
> 
> 
> ----邮件原文----
> 发件人:internet-drafts <internet-drafts@ietf.org>
> 收件 
> 人:Weiqiang Cheng <chengweiqiang@chinamobile.com>,Sander Steffann <sander@steffann.nl>,SJM Steffann <sander@steffann.nl>
> 抄 送: (无)
> 发送时间:2020-11-15 22:58:57
> 主题:New Version Notification for draft-srcompdt-spring-compression- 
> requirement-01.txt
> 
> 
> A new version of I-D, draft-srcompdt-spring-compression-requirement-01.txt
> has been successfully submitted by Weiqiang Cheng and posted to the
> IETF repository.
> 
> Name: draft-srcompdt-spring-compression-requirement
> Revision: 01
> Title: Compressed SRv6 SID List Requirements
> Document date: 2020-11-13
> Group: Individual Submission
> Pages: 13
> URL: https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-requirement-01.txt
> Status: https://datatracker.ietf.org/doc/draft-srcompdt-spring-compression-requirement/
> Htmlized: https://datatracker.ietf.org/doc/html/draft-srcompdt-spring-compression-requirement
> Htmlized: https://tools.ietf.org/html/draft-srcompdt-spring-compression-requirement-01
> Diff: https://www.ietf.org/rfcdiff?url2=draft-srcompdt-spring-compression-requirement-01
> 
> Abstract:
>   This document specifies requirements for solutions to compress SRv6
>   SID lists.
> 
> 
> 
> 
> 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
> 
> 
> 
> Subject:New Version Notification for draft-srcompdt-spring-compression- 
> requirement-01.txt
> 
> 
> A new version of I-D, draft-srcompdt-spring-compression-requirement-01.txt
> has been successfully submitted by Weiqiang Cheng and posted to the
> IETF repository.
> 
> Name: draft-srcompdt-spring-compression-requirement
> Revision: 01
> Title: Compressed SRv6 SID List Requirements
> Document date: 2020-11-13
> Group: Individual Submission
> Pages: 13
> URL: https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-requirement-01.txt
> Status: https://datatracker.ietf.org/doc/draft-srcompdt-spring-compression-requirement/
> Htmlized: https://datatracker.ietf.org/doc/html/draft-srcompdt-spring-compression-requirement
> Htmlized: https://tools.ietf.org/html/draft-srcompdt-spring-compression-requirement-01
> Diff: https://www.ietf.org/rfcdiff?url2=draft-srcompdt-spring-compression-requirement-01
> 
> Abstract:
>   This document specifies requirements for solutions to compress SRv6
>   SID lists.
> 
> 
> 
> 
> 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
> 
> 
> 
> 
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
> 


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Stefano Salsano
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Dipartimento Ingegneria Elettronica
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