Re: [Teas] New term for the underlay construct used for slice realization
"Dongjie (Jimmy)" <jie.dong@huawei.com> Fri, 13 August 2021 15:52 UTC
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "Joel M. Halpern" <jmh@joelhalpern.com>, "teas@ietf.org" <teas@ietf.org>
Thread-Topic: [Teas] New term for the underlay construct used for slice realization
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Date: Fri, 13 Aug 2021 15:52:41 +0000
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Subject: Re: [Teas] New term for the underlay construct used for slice realization
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Hi Joel, Since usually the set of resources are allocated on a subset of the nodes and links in the underlay network, there is a need to specify the sub-topology on which the resources are allocated. That's why we say "VTN is associated with a logical topology", and it aligns with what you said "it needs to be tied to a topology where it is supported". So, I hope we agree that it is "a set of resources provisioned in a sub-topology". And I agree we don't need to introduce a new topology identifier. There are well-defined mechanisms (e.g. MT, Flex-Algo) to specify the sub-topology, and it just need to refer to an existing "topology identifier". As for "it is not a forwarding construct", may I know your definition of "forwarding construct"? To me the resources are allocated in the forwarding plane, thus it should be considered as a "forwarding construct". Please note this is a general discussion about the functionality of this construct, which can be applicable to different data plane encapsulations. Best regards, Jie > -----Original Message----- > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Joel M. Halpern > Sent: Friday, August 13, 2021 9:30 PM > To: Dongjie (Jimmy) <jie.dong@huawei.com>; teas@ietf.org > Subject: Re: [Teas] New term for the underlay construct used for slice > realization > > If, as per the bestbar draft and the discussion of VTN-ID on 6man, this > construct is NOT a forwarding construct, then I do not see how it > identifies a sub-topology. It needs to be tied to a topology where it > is supported. But since it is not the forwarding construct, it doesn't need to > identify that topology as far as I can tell. > > Yours, > Joel > > On 8/13/2021 8:11 AM, Dongjie (Jimmy) wrote: > > Hi John, > > > > Thanks for your clarification. I think we are mostly aligned. > > > > My hope is the new term could reflect the two basic attributes of the > underlay construct: partitioned resource and a (sub-)topology. > > > > Best regards, > > Jie > > > >> -----Original Message----- > >> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of John E Drake > >> Sent: Wednesday, August 11, 2021 8:38 PM > >> To: Dongjie (Jimmy) <jie.dong@huawei.com>; Lizhenbin > >> <lizhenbin@huawei.com>; teas@ietf.org > >> Subject: Re: [Teas] New term for the underlay construct used for > >> slice realization > >> > >> Jimmy, > >> > >> Snipped, comments inline. > >> > >> Yours Irrespectively, > >> > >> John > >> > >> > >> Juniper Business Use Only > >> > >>> -----Original Message----- > >>> From: Dongjie (Jimmy) <jie.dong@huawei.com> > >>> Sent: Tuesday, August 10, 2021 11:03 PM > >>> To: John E Drake <jdrake@juniper.net>; Lizhenbin > >>> <lizhenbin@huawei.com>; teas@ietf.org > >>> Subject: RE: New term for the underlay construct used for slice > >>> realization > >>> > >>> [External Email. Be cautious of content] > >>> > >> underlay construct for network slice realization bound to > >>>>> network slice services? That is, is the underlay construct only > >>>>> for use in network slicing, or should it be generalized for more > >>>>> possible > >> uses? > >>>> > >>>> [JD] Absolutely yes > >>> > >>> [Jie] I guess you mean "Yes" to the latter case, which is "it should > >>> be generalized for more possible uses", is my understanding correct? > >> > >> [JD] Yes to the latter > >> > >>> > >>>> > >>>>> > >>>>> 2. If the answer to question 1 is YES, should it reflect the following > >>>>> characteristics? > >>>>> > >>>>> a. It is about the underlay > >>>>> b. It is about the partitioned resources used to deliver the > network > >> slice > >>>>> services > >>>>> c. It allows the 1:1, N:1, and 1:N mapping models between the > >> network > >>>> slice > >>>>> services and the underlay construct. The 1:1 and N:1 mapping may > >>>>> be straightforward. Does it also make sense to divide the elements > >>>>> or traffic flows in a single network slice service to carry them > >>>>> in different > >>>> underlay constructs? > >>>> > >>>> [JD] Yes to all of the above. Please see: > >>>> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/d > >>>> r > >>>> af > >>>> t-drake-bess-enhanced-vpn-06__;!!NEt6yMaO- > >>> gk!TCiJHCZCwFgwpuFoujxVlZ4r9 > >>>> F6mLpE4nJ-9zpqkY-kls-ROxL4C2_xNaR2ImI4$ > >>>>> > >>>>> Lastly, here are some candidates of the "new term": > >>>>> > >>>>> Option 1: The network slice service is called "overlay slice", > >>>>> then the underlay construct is called "underlay slice". > >>>>> > >>>>> Option 2: The network slice service is called "service slice", > >>>>> then the underlay construct is called "resource slice". > >>>> > >>>> [JD] I don't think we need another term for what we are already > >>>> calling an 'IETF Network Slice Service'. Adrian and I are > >>>> considering the term 'resource partition' to describe the > >>>> partitioning of underlay network resources in support of various > >>>> overlay services such as IETF Network > >>> Slice Services. > >>>> This is congruent with the ideas expressed in: > >>>> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/d > >>>> r > >>>> af > >>>> t-ietf-spring-resource-aware-segmen__;!!NEt6yMaO- > >>> gk!TCiJHCZCwFgwpuFouj > >>>> xVlZ4r9F6mLpE4nJ-9zpqkY-kls-ROxL4C2_xNxEfwaXg$ > >>>> ts-03. What this allows one to build is an 'partitioned underlay > >>>> network topology'. > >>> > >>> [Jie] Agree that here we are talking about the term for the underlay > construct. > >>> "Resource partition" captures one of its key characteristics, while > >>> IMO another thing the term needs to reflect is that the resource > >>> partition is needed on a subset of the links and nodes (rather than > >>> on a single node or link) in the physical network, which together > >>> builds a logical > >> network topology. > >> > >> [JD] In my initial email, above, I was proposing 'partitioned > >> underlay network topology' > >> > >>> > >>> Best regards, > >>> Jie > >>> > >>>> > >>>>> > >>>>> Your opinion about these candidates are much appreciated. You may > >>>>> also propose other new term if it complies with the above two points. > >>>> > >>>> [JD] I think you have exceeded your remit. > >>>> > >>>>> > >>>>> > >>>>> > >>>>> Best Regards, > >>>>> Robin > >>>>> > >>>>> _______________________________________________ > >>>>> Teas mailing list > >>>>> Teas@ietf.org > >>>>> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/ > >>>>> te > >>>>> as > >>>>> __;!!N > >>>>> Et6yMaO-gk!Q0ycOf0ELxT6mG1GbnO4LSL-Q99J4uu7jfdUtBECaI- > >>>>> O08HqD31TGJciNjuxL2A$ > >>>> > >>>> _______________________________________________ > >>>> Teas mailing list > >>>> Teas@ietf.org > >>>> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/t > >>>> e > >>>> as > >>>> __;!!NEt6yMaO-gk!TCiJHCZCwFgwpuFoujxVlZ4r9F6mLpE4nJ-9zpqkY-kls- > >>> ROxL4C2 > >>>> _xNDCrPaNQ$ > >> > >> _______________________________________________ > >> Teas mailing list > >> Teas@ietf.org > >> https://www.ietf.org/mailman/listinfo/teas > > > > _______________________________________________ > > Teas mailing list > > Teas@ietf.org > > https://www.ietf.org/mailman/listinfo/teas > > > > _______________________________________________ > Teas mailing list > Teas@ietf.org > https://www.ietf.org/mailman/listinfo/teas
- [Teas] New term for the underlay construct used f… Lizhenbin
- Re: [Teas] New term for the underlay construct us… John E Drake
- Re: [Teas] New term for the underlay construct us… Joel M. Halpern
- Re: [Teas] New term for the underlay construct us… John E Drake
- Re: [Teas] New term for the underlay construct us… Joel M. Halpern
- Re: [Teas] New term for the underlay construct us… gregory.mirsky
- Re: [Teas] New term for the underlay construct us… Dongjie (Jimmy)
- Re: [Teas] New term for the underlay construct us… Dongjie (Jimmy)
- Re: [Teas] New term for the underlay construct us… Dongjie (Jimmy)
- Re: [Teas] New term for the underlay construct us… John E Drake
- Re: [Teas] New term for the underlay construct us… Kiran Makhijani
- Re: [Teas] New term for the underlay construct us… John E Drake
- Re: [Teas] New term for the underlay construct us… Adrian Farrel
- Re: [Teas] New term for the underlay construct us… gregory.mirsky
- Re: [Teas] New term for the underlay construct us… Gyan Mishra
- Re: [Teas] New term for the underlay construct us… Kiran M
- Re: [Teas] New term for the underlay construct us… Gyan Mishra
- Re: [Teas] New term for the underlay construct us… Adrian Farrel
- Re: [Teas] New term for the underlay construct us… Luis M. Contreras
- Re: [Teas] New term for the underlay construct us… Tarek Saad
- Re: [Teas] New term for the underlay construct us… Adrian Farrel
- Re: [Teas] New term for the underlay construct us… Kiran M
- Re: [Teas] New term for the underlay construct us… Vishnu Pavan Beeram
- Re: [Teas] New term for the underlay construct us… Dongjie (Jimmy)
- Re: [Teas] New term for the underlay construct us… Dongjie (Jimmy)
- Re: [Teas] New term for the underlay construct us… Joel M. Halpern
- Re: [Teas] New term for the underlay construct us… Dongjie (Jimmy)
- Re: [Teas] New term for the underlay construct us… Joel M. Halpern
- Re: [Teas] New term for the underlay construct us… Igor Bryskin
- Re: [Teas] New term for the underlay construct us… peng.shaofu
- Re: [Teas] New term for the underlay construct us… John E Drake
- Re: [Teas] New term for the underlay construct us… Lizhenbin
- Re: [Teas] New term for the underlay construct us… John E Drake
- Re: [Teas] New term for the underlay construct us… 龚立艳
- Re: [Teas] New term for the underlay construct us… Lizhenbin
- Re: [Teas] New term for the underlay construct us… Tarek Saad
- Re: [Teas] New term for the underlay construct us… Vishnu Pavan Beeram
- Re: [Teas] New term for the underlay construct us… Adrian Farrel
- Re: [Teas] New term for the underlay construct us… Vishnu Pavan Beeram