[Teas] 答复: Update and Request to Adopt draft-dong-teas-enhanced-vpn

"Aijun Wang" <wangaijun@tsinghua.org.cn> Tue, 23 October 2018 04:22 UTC

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From: "Aijun Wang" <wangaijun@tsinghua.org.cn>
To: "'Dongjie \(Jimmy\)'" <jie.dong@huawei.com>, "'TEAS WG'" <teas@ietf.org>
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Hi, Jie:

I have just read through briefly the related drafts that you mentioned, and have the following comments, please whether they are appropriate or not.

I think this draft is useful. It analyzes the requirements of VPN+ and the insufficient of the current related technologies. The key points may be that the physical resources allocation and its integration with the SR technologies.
As described within the draft, such solution is needed to meet the emerge critical services in 5G era. 

>From my understandings, the extension to the IGP protocol is necessary, as described in the draft (https://tools.ietf.org/html/draft-dong-lsr-sr-enhanced-vpn-00), but the most challenge works to fulfill the requirements mentioned in https://tools.ietf.org/html/draft-dong-teas-enhanced-vpn-02 is how to integrate the candidate technologies/solutions seamlessly. For example, ACTN provides the architecture for coordination between the controller in different layer/domain and the communication models among them, SR provides the flexibility to program the packet path on demand and the FlexE/Dedicated Queues etc provides the assured delivery service in each segment/node.

Then, is it better to combine the draft  https://tools.ietf.org/html/draft-dong-teas-enhanced-vpn-02 with draft https://tools.ietf.org/html/draft-dong-spring-sr-for-enhanced-vpn-01 to focus on the above aim?
And, draft https://tools.ietf.org/html/draft-lee-rtgwg-actn-applicability-enhanced-vpn-03 analyses the gap between ACTN and the requirements of VPN+, can it also be integrated together?

After doing the above work, the structure of the draft may be the followings:
1.  Overview of the Requirements(as that in current draft)
2.  Candidate Solutions(not technology) (as that in current draft, but simplified)
3.  Gap with the ACTN architecture.(as that in draft from Lee/Daniel)
4.  Proposed VPN+ framework and solution(as that in current draft, but more pertinences to the integration descriptions as that in https://tools.ietf.org/html/draft-dong-spring-sr-for-enhanced-vpn-01 )
5.  Proposed protocol extension(individual draft, as that in https://tools.ietf.org/html/draft-dong-lsr-sr-enhanced-vpn-00)

We can also seek the responses from the experts after your introduction on the coming TEAS meeting, or the feedbacks on this thread.

Best Regards.

Aijun Wang
Network R&D and Operation Support Department
China Telecom Corporation Limited Beijing Research Institute,Beijing, China.

发件人: Dongjie (Jimmy) [mailto:jie.dong@huawei.com] 
发送时间: 2018年10月18日 17:51
收件人: TEAS WG
主题: [Teas] Update and Request to Adopt draft-dong-teas-enhanced-vpn

Hi all, 

A new revision of draft-dong-teas-enhanced-vpn is submitted to solve the comments received recently. 

This document specifies a framework for using existing, modified and potential new networking technologies as components to provide an enhanced VPN (VPN+) service. The major changes in this version are: 

  1) In Introduction section, add references to network slicing related works in the industry. 

  2) In section 2, update the description of the isolation requirement.

  3) In section 4 “Candidate Technologies”, reduce the introduction about segment routing.

  4) In section 4 “Candidate Technologies”, update the control plane subsection and add a new sub-section for management plane

  5) Add references to the candidate technologies.

  6) Editorial changes to improve the readability.

This document was initially submitted in last year as draft-bryant-rtgwg-enhanced-vpn, and was presented and discussed several times in RTGWG. According to the consensus between the chairs of RTGWG and TEAS, this draft was moved to TEAS WG, and presented in TEAS on IETF 102. 

Currently there are several enhanced VPN related drafts:

  draft-dong-spring-sr-for-enhanced-vpn, which describes the Segment Routing based mechanism for enabling enhanced VPN services.

  draft-dong-lsr-sr-enhanced-vpn, which specifies the IGP extensions needed for SR based enhanced VPN.

  draft-lee-rtgwg-actn-applicability-enhanced-vpn, which describes the applicability of ACTN to enhanced VPN.

This framework document plays an important role as it builds the foundation for the above documents. 

After several rounds of update, the content of this document is getting stable, the co-authors believe it is ready for the WG to adopt it, and would like to solicit to initiate the adoption poll on this document.

Best regards,
Jie (on behalf of coauthors)

-----Original Message-----
From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
Sent: Thursday, October 18, 2018 5:25 PM
To: Dongjie (Jimmy) <jie.dong@huawei.com>;; Stewart Bryant <stewart.bryant@gmail.com>;; Takuya Miyasaka <ta-miyasaka@kddi.com>;; Zhenqiang Li <lizhenqiang@chinamobile.com>;
Subject: New Version Notification for draft-dong-teas-enhanced-vpn-02.txt

A new version of I-D, draft-dong-teas-enhanced-vpn-02.txt
has been successfully submitted by Jie Dong and posted to the IETF repository.

Name:		draft-dong-teas-enhanced-vpn
Revision:	02
Title:		A Framework for Enhanced Virtual Private Networks (VPN+)
Document date:	2018-10-18
Group:		Individual Submission
Pages:		27
URL:            https://www.ietf.org/internet-drafts/draft-dong-teas-enhanced-vpn-02.txt
Status:         https://datatracker.ietf.org/doc/draft-dong-teas-enhanced-vpn/
Htmlized:       https://tools.ietf.org/html/draft-dong-teas-enhanced-vpn-02
Htmlized:       https://datatracker.ietf.org/doc/html/draft-dong-teas-enhanced-vpn
Diff:           https://www.ietf.org/rfcdiff?url2=draft-dong-teas-enhanced-vpn-02

   This document specifies a framework for using existing, modified and
   potential new networking technologies as components to provide an
   enhanced VPN (VPN+) service.  The purpose is to enable virtual
   private networks (VPNs) to support the needs of new applications,
   particularly applications that are associated with 5G services.  A
   network enhanced with these properties can form the underpinning of
   network slicing, but will also be of use in its own right.


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