Re: [Teas] network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00
Kiran Makhijani <kiranm@futurewei.com> Tue, 23 February 2021 16:52 UTC
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From: Kiran Makhijani <kiranm@futurewei.com>
To: John E Drake <jdrake=40juniper.net@dmarc.ietf.org>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Joel M. Halpern" <jmh@joelhalpern.com>, "teas@ietf.org" <teas@ietf.org>
Thread-Topic: [Teas] network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00
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Date: Tue, 23 Feb 2021 16:52:44 +0000
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Subject: Re: [Teas] network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00
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Hello: This does not align with the current document at several levels. We are lost. I guess suggesting CE/PE looks at these definitions from a provider point of view – ‘what do I need to do to provide this slice?’ But as we continued to refine and ‘snip’ the text (found not useful) – it became more about how user of slice sees it. At one point customer was replaced with consumer, now we have opposite request (btw, I have no preference). We have covered in the past that service is overused – each technology has its own meaning of service (# of RFCs pointed to). Since we were defining in a tech-agnostic way, the preference is to avoid it. I see a user of slice saying ‘this is my network’ rather than ‘a service I asked for’. At this time – user is only interacting with a network slice controller – does not know which network provider is going to provide the resources for slices. If this were an end-to-end slice, PE and CE could make sense. But it is not, the scope of work in IETF network slice can be end-to-end but mainly just a segment. I understand comfort with legacy terms, but I think it is not important here – a lot of effort has gone in making this document stand on its own (again because it is unaware of means of realizing legacy/existing technologies). When we do the act of ‘realizing’ slices, all these suggestions are spot-on useful. I read first half of draft-bestbar-teas-ns-packet – it is an excellent place for realization or provider-centric type of discussion. Cheers, Kiran From: Teas <teas-bounces@ietf.org> on behalf of John E Drake <jdrake=40juniper.net@dmarc.ietf.org> Date: Tuesday, February 23, 2021 at 06:52 To: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>, Joel M. Halpern <jmh@joelhalpern.com>, teas@ietf.org <teas@ietf.org> Subject: Re: [Teas] network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00 Hi, Eric and I have reviewed the Definitions draft, the email thread with the subject line: Network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00, and the RFCs referenced in emails on that thread - 3985, 4110, 4026, 4664, and 8309, and we would like to propose that in the Definitions draft we replace 'network slice endpoint' with 'CE' and 'network slice realization endpoint' with 'PE', that we reference RFCs 3985, 4110, 4026, 4664, and 8309, and that we replace the current figure in Endpoint section with several figures, which show connectivity constructs and which are consistent with these RFCs. We would also like to replace 'consumer' with 'customer', add 'attachment circuit', and add a new term, viz, 'IETF Network Slice Service', whose definition is a set of CEs, a set of connectivity constructs (MP2MP, P2MP, P2P, etc.) between subsets of these CEs and an SLO for each CE sending to each connectivity construct. As an aside, the Endpoint section of the Definitions draft uses the bulk of its prose enumerating what its endpoints are not. Per Yakov, since there are a potentially infinite number of things which its endpoints are not, this is futile and we would like to remove that prose. Yours Irrespectively, Eric and John Juniper Business Use Only > -----Original Message----- > From: Teas <teas-bounces@ietf.org> On Behalf Of > mohamed.boucadair@orange.com > Sent: Tuesday, February 16, 2021 11:59 AM > To: Joel M. Halpern <jmh@joelhalpern.com>; teas@ietf.org > Subject: Re: [Teas] network Slice Endpoint in draft-ietf-teas-ietf-network-slice- > definition-00 > > [External Email. Be cautious of content] > > > Re-, > > Indeed. That's need to be fixed. > > As we are on the terminology, I do also suggest that the draft is updated to > adhere to RFC8309. Given the recursiveness discussed in the draft, having geo- > coordinates interfaces is also confusing. Inspiring from RFC8309 would make > more sense. > > Cheers, > Med > > > -----Message d'origine----- > > De : Joel M. Halpern [mailto:jmh@joelhalpern.com] Envoyé : mardi 16 > > février 2021 17:44 À : BOUCADAIR Mohamed TGI/OLN > > <mohamed.boucadair@orange.com>; teas@ietf.org Objet : Re: [Teas] > > network Slice Endpoint in draft-ietf-teas-ietf- > > network-slice-definition-00 > > > > I would be happy to use CE and PE. I would also be happy to use > > completely different words. The current diagram and terminology makes > > this very confusing, and leads to problems. > > > > Yours, > > Joel > > > > On 2/16/2021 11:39 AM, mohamed.boucadair@orange.com wrote: > > > Re-, > > > > > > Please see inline. > > > > > > Cheers, > > > Med > > > > > >> -----Message d'origine----- > > >> De : Teas [mailto:teas-bounces@ietf.org] De la part de Joel M. > > >> Halpern > > >> Envoyé : mardi 16 février 2021 17:12 À : teas@ietf.org Objet : Re: > > >> [Teas] network Slice Endpoint in draft-ietf-teas-ietf- > > >> network-slice-definition-00 > > >> > > >> The document is not about the request from the external customer > > (the > > >> request for the end-to-end network slice). It is about the request > > >> from other orchestration systems to the IETF Network Slice > > management > > >> systems. > > > > > > [Med] ... which is still behaving as the customer role. > > > > > > Yes, those systems need to know where they intent to > > >> utilize the IETF network slice. But the IETF network slice does > > not > > >> need to know about that. > > > > > > [Med] This is what I fail to see. The orchestrator has an internal > > vision that is not available to the entity asking for a slice. These > > nodes are not even known to the "other orchestration systems" when > > asking for a slice. > > > > > >> > > >> In particular, when we get to talking about configuring the IETF > > >> Network Slice properties, the edge (ingress) that the IETF Network > > >> Slice controller controls (and corresponding egress) is what needs > > to > > >> be provisioned. > > > > > > [Med] Agree, but that is a distinct phase. > > > > > > BTW, ingress/egress are as a function of the traffic direction. A > > node (PE) may behave as both ingress and egress for the same slice. > > > > > >> It is possible that on the egress side there needs to be > > information > > >> about how to deliver the traffic externally. > > > > > > [Med] Agree. That node does not need to be visible (known in > > advance) to the entity that will consume the corresponding slice. > > > > > > But that would not be > > >> in terms of end-points since from the perspective of the IETF > > Network > > >> Slice, on the egress that is not an endpoint of anything. > > > > > > [Med] I agree that "endpoint" is confusing. "Customer Node/Edge" vs > > "Provider Edge" are my favorite here. > > > > > >> > > >> Yours, > > >> Joel > > >> > > >> On 2/16/2021 11:05 AM, mohamed.boucadair@orange.com wrote: > > >>> Hi Joel, > > >>> > > >>> I disagree with this note. I do think that both flavors of > > >> "endpoint" should be included in the draft. > > >>> > > >>> >From the customer standpoint, a slice request cannot be > > >> characterized by elements not visible to the customer. The scope > > of a > > >> requested slice can only be characterized between nodes that are > > >> known to the requestor. This is usually called, CE. > > >>> > > >>> The mapping between a CE and a network device (typically, a PE) > > is > > >> a process that is internal to the slice provider. > > >>> > > >>> The CE-PE link cannot be systematically excluded as some specific > > >> behaviors may need to be enforced in the CE-PE link. Think about a > > >> slice that is implemented by means of a PE-based VPN and which > > >> requires some specific routing + QoS policies at the CE-PE link. > > >>> > > >>> Cheers, > > >>> Med > > > > > > > > > > > > _________________________________________________________________ > ____ > > _ > > > ___________________________________________________ > > > > > > 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. 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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. > > _______________________________________________ > Teas mailing list > Teas@ietf.org > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fteas__%3B!!N&data=04%7C01%7Ckiranm%40futurewei.com%7Ca9aed50bd6fb4368c39408d8d80ab0ca%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637496887761926645%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=faK5qheEwsQhlbRHFuuHkv%2BRl3tgWzp%2FOtiBUNJSFls%3D&reserved=0 > Et6yMaO-gk!TrdpM67-tg4psF0dnG7jBV9LisKHxO_oCNxmQXrJhY- > B6MFchY8gBvvb8CNl408$ _______________________________________________ Teas mailing list Teas@ietf.org https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fteas&data=04%7C01%7Ckiranm%40futurewei.com%7Ca9aed50bd6fb4368c39408d8d80ab0ca%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637496887761926645%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=SnXf5%2FZ3IQcyZzOVIi0CDfcwo3bUJWLNKz%2FF6djDl1M%3D&reserved=0
- [Teas] network Slice Endpoint in draft-ietf-teas-… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel Halpern Direct
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Kiran Makhijani
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Uma Chunduri
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Uma Chunduri
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… tom petch
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Daniele Ceccarelli
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Kiran Makhijani
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Greg Mirsky
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Rokui, Reza (Nokia - CA/Ottawa)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Eric Gray
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Luis M. Contreras
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Luis M. Contreras
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Young Lee
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Young Lee
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Dongjie (Jimmy)
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Shunsuke Homma
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Shunsuke Homma
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Ogaki, Kenichi
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Shunsuke Homma
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Shunsuke Homma
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Shunsuke Homma
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Shunsuke Homma
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Gyan Mishra
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Joel M. Halpern
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Tarek Saad
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Greg Mirsky
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… LUIS MIGUEL CONTRERAS MURILLO
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Tarek Saad
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Tarek Saad
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Adrian Farrel
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Krzysztof Szarkowicz
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… John E Drake
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair
- Re: [Teas] network Slice Endpoint in draft-ietf-t… Krzysztof Szarkowicz
- Re: [Teas] network Slice Endpoint in draft-ietf-t… mohamed.boucadair