Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
"Dongjie (Jimmy)" <jie.dong@huawei.com> Sun, 26 July 2020 02:35 UTC
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: Tarek Saad <tsaad.net@gmail.com>, James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
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Thread-Topic: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Date: Sun, 26 Jul 2020 02:35:18 +0000
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi Tarek, Thanks for your comment, please see some replies inline: From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Tarek Saad Sent: Sunday, July 26, 2020 2:57 AM To: James Guichard <james.n.guichard@futurewei.com>; spring@ietf.org Cc: spring-chairs@ietf.org Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn Hi WG, This document is touching important topics regarding forwarding on specific set of resources in the network (such as those that define a network slice). For this, it's important to be able to identify transiting traffic as belonging to a specific slice so as to impose the specific behavior upon forwarding the traffic on the associated resources. This draft is proposing to allocate/assign different labels/SIDs (per topological element - either node or link) to identify the specific resource per slice and the respective forwarding behavior. This may work for smaller networks (and for limited number of slices), but there are concerns that it would run into scale problems (related to # of required labels to allocate and amount of IGP state required for the different SIDs) - as number of topological elements in the network grows and number of vertical/ horizontal slices grows. [Jie] Glad to know that you also think this is an important topic and can be useful for cases such as network slicing (while its applicability is general). This document describes the SR based mechanism for this. As mentioned in section 2 of this document, it requires additional SIDs and SRv6 Locators to be allocated, thus its applicability is for scenarios with limited number of virtual networks. The amount of IGP state is discussed in the relevant control plane drafts in LSR WG. It might be useful to define a mechanism by which specific allocated resources for a given link or node are to be identified and not describe how virtual network topologies are to be constructed. This is because the topologies are not necessarily virtual and because there are a multiplicity of uses for this mechanism beyond constructing subsets of the underlay network topology. We believe encoding the slice identifier separate from the forwarding instruction can yield better scale and still allow for steering on the specific resource. We intend to publish something along those lines in the coming next couple of weeks to gather more feedback. [Jie] The scalability topic is further described in draft-dong-teas-enhanced-vpn-vtn-scalability in TEAS WG, which also provides some guidance for optimization, your review and comment to it are welcome. Thanks. Best regards, Jie Regards, Tarek From: spring <spring-bounces@ietf.org<mailto:spring-bounces@ietf.org>> on behalf of James Guichard <james.n.guichard@futurewei.com<mailto:james.n.guichard@futurewei.com>> Date: Wednesday, July 15, 2020 at 7:17 AM To: "spring@ietf.org<mailto:spring@ietf.org>" <spring@ietf.org<mailto:spring@ietf.org>> Cc: "spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>" <spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>> Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn Dear WG: This email begins a 2 week WG adoption call for https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending Wednesday 29th July 2020. Please speak up if you support or oppose adopting this document into the WG. Please also provide comments/reasons for that support (or lack thereof). Silence will not be considered consent. Thanks! Jim, Joel & Bruno
- [spring] WG Adoption Call for draft-dong-spring-s… James Guichard
- Re: [spring] WG Adoption Call for draft-dong-spri… Zhuangshunwan
- Re: [spring] WG Adoption Call for draft-dong-spri… Huzhibo
- Re: [spring] WG Adoption Call for draft-dong-spri… li_zhenqiang@hotmail.com
- [spring] 答复: WG Adoption Call for draft-dong-spri… qinfengwei
- Re: [spring] WG Adoption Call for draft-dong-spri… Xiejingrong (Jingrong)
- Re: [spring] WG Adoption Call for draft-dong-spri… Jeff Tantsura
- Re: [spring] WG Adoption Call for draft-dong-spri… Gyan Mishra
- Re: [spring] WG Adoption Call for draft-dong-spri… stefano previdi
- Re: [spring] WG Adoption Call for draft-dong-spri… Linda Dunbar
- [spring] 回复: WG Adoption Call for draft-dong-spri… zhuyq8
- Re: [spring] WG Adoption Call for draft-dong-spri… Peng Liu
- Re: [spring] WG Adoption Call for draft-dong-spri… Mach Chen
- Re: [spring] WG Adoption Call for draft-dong-spri… zhaofeng@caict.ac.cn
- Re: [spring] WG Adoption Call for draft-dong-spri… Dongjie (Jimmy)
- Re: [spring] WG Adoption Call for draft-dong-spri… Ran Pang(联通集团联通网络技术研究 院本部)
- Re: [spring] WG Adoption Call for draft-dong-spri… Dongjie (Jimmy)
- Re: [spring] WG Adoption Call for draft-dong-spri… Aijun Wang
- Re: [spring] WG Adoption Call for draft-dong-spri… Tomonobu Niwa
- Re: [spring] WG Adoption Call for draft-dong-spri… Zhuangzhuang Qin(联通北京市北京市分 公司)
- Re: [spring] WG Adoption Call for draft-dong-spri… Gengxuesong (Geng Xuesong)
- Re: [spring] WG Adoption Call for draft-dong-spri… Takuya Miyasaka
- Re: [spring] WG Adoption Call for draft-dong-spri… Francois Clad (fclad)
- Re: [spring] WG Adoption Call for draft-dong-spri… Chengli (Cheng Li)
- Re: [spring] WG Adoption Call for draft-dong-spri… Ketan Talaulikar (ketant)
- Re: [spring] WG Adoption Call for draft-dong-spri… Dongjie (Jimmy)
- Re: [spring] WG Adoption Call for draft-dong-spri… Huaimo Chen
- Re: [spring] WG Adoption Call for draft-dong-spri… Dhruv Dhody
- Re: [spring] WG Adoption Call for draft-dong-spri… Tarek Saad
- Re: [spring] WG Adoption Call for draft-dong-spri… Dongjie (Jimmy)
- Re: [spring] WG Adoption Call for draft-dong-spri… Dongjie (Jimmy)
- Re: [spring] WG Adoption Call for draft-dong-spri… Yingzhen Qu
- Re: [spring] WG Adoption Call for draft-dong-spri… Weiqiang Cheng
- Re: [spring] WG Adoption Call for draft-dong-spri… Luis M. Contreras
- Re: [spring] WG Adoption Call for draft-dong-spri… Adrian Farrel
- Re: [spring] WG Adoption Call for draft-dong-spri… Stewart Bryant
- Re: [spring] WG Adoption Call for draft-dong-spri… machh@chinatelecom.cn
- Re: [spring] WG Adoption Call for draft-dong-spri… licong@chinatelecom.cn
- Re: [spring] WG Adoption Call for draft-dong-spri… Greg Mirsky
- Re: [spring] WG Adoption Call for draft-dong-spri… Shunsuke Homma
- Re: [spring] WG Adoption Call for draft-dong-spri… xiong.quan
- Re: [spring] WG Adoption Call for draft-dong-spri… Loa Andersson
- Re: [spring] WG Adoption Call for draft-dong-spri… Greg Mirsky