Re: [Teas] Network slicing framework : Issue #6: Realisation Architecture and Terminology

["Luis M. Contreras" <[e-mail]>]

Hi Adrian,

revisiting your proposed figure, and considering current Figure 2 in the
draft (the one showing the NSC between the high level orchestration system
and the Networc Controllers), I think it would be convenient to include the
network controller(s) here interfacing with the NSC in the boundary you
marl as Physical Network. The Network controller will be the one
controlling (i.e., in direct touch) with the physical network, and
providing a view (filtered or not) of the Physical network to the NSC.

Showing it in this way I think keeps consistency with Fig 2 in the document
and also avoids confusion. This does not prevent the fact the NSC could be
integrated with Network Controller in some cases.

Furthermore, it could be better to rename "Controller view" to "NSC view"
or either "provider view" in the upper part of the figure.

Best regards

Luis

El lun, 27 sept 2021 a las 20:24, Adrian Farrel (<[e-mail]>)
escribió:

> Hi,
>
>
>
> There was surprisingly little shouting about this proposal in my slides
> today. This may meant that more time is needed to digest it, or it may be
> that everyone has been doing their homework and we have something
> approaching agreement.
>
>
>
> First the picture (with a light touch to the choice of terms), and then
> some discussion of terms.
>
>
>
>
>
>                        --      --      --
>
>                       |CE|    |CE|    |CE|
>
>                        --      --      --
>
>                      AC :    AC :    AC
> :
>
>                      ----------------------        -------
>
>                     ( |PE|....|PE|....|PE| )      ( IETF  )
>
>                    (   --:     --     :--   )    ( Network )
>
>                    (     :............:     )    (  Slice
> )
>
>                     (  IETF Network Slice  )      (       )  Customer
>
>                      ----------------------        -------     View
>
>                   ........................\........./..................
>
>                                            \       /        Controller
>
>           >>>>>>>>>>>>>>>  Grouping/Mapping v     v            View
>
>          ^             -----------------------------------------
>
>          ^            ( |PE|.......|PE|........|PE|.......|PE|  )
>
>     ------------     (   --:        --         :--         --    )
>
>    |            |    (     :...................:                 )
>
>    | Controller |     (        Network Resource Partition       )
>
>    |   (NSC)    |      -----------------------------------------
>
>    |            |                             |
>
>    |            |>>>>>  Resource Partitioning |
>
>     ------------        of Available Topology |
>
>      v   v                                    v
>
>      v   v            -----------------------------      --------
>
>      v   v           (|PE|..-..|PE|... ..|PE|..|PE|)    (        )
>
>      v   v          ( :--  |P|  --   :-:  --   :--  )  (  Filter  )
>
>      v   v          ( :.-   -:.......|P|       :-   )  ( Topology )
>
>      v   v          (  |P|...........:-:.......|P|  )   (        )
>
>      v   v           (  -    Filter Topology       )     --------
>
>      v   v            -----------------------------       A
>
>      v    >>>>>>>>>>>>  Topology Filter A                /
>
>      v            .......................\............../..............
>
>      v                                    \            /  Physical Network
>
>      v            ------------------------------------------------
>
>      v           ( |PE|.....-.....|PE|.......    |PE|.......|PE|  )
>
>      v          (   --     |P|     --       :-...:--     -..:--    )
>
>       >>>>>>>>>(    :       -:..............|P|.........|P|
> )
>
>                (    -.......................:-:..-       -          )
>
>                 (  |P|..........................|P|......:         )
>
>                  (  -                            -                )
>
>                   ------------------------------------------------
>
>
>
> And now the names for the pieces.
>
>
>
> I think that “IETF Network Slice” is uncontentious.
>
> I think that “Physical Network” is clear, although I would note that this
> could actually be a virtual network.
>
>
>
> There was some debate about what a “Filter Topology” is. This undoubtedly
> needs some words and thought. My working text for this is:
>
>      The Physical Network may be filtered into a number of Filter
>
>      Topologies.  Filter actions may include selection of specific nodes
>
>      and links according to their capabilities and are based on network-
>
>      wide policies.  The resulting topologies can be used to host IETF
>
>      Network Slices and provide a useful way for the network operator to
>
>      know that all of the resources they are using to plan a network
>
>      slice meet specific SLOs.  This could be an offline planning
>
>      activity or could be performed dynamically as new demands arise.
>
>      The use of Filter Topologies is entirely optional in the architecture
>
>      and  IETF Network Slices could be hosted directly on the Physical
>
>      Network.
>
>
>
> The remaining term is for the collection of resources that are used to
> support the IETF Network Slice or grouping of IETF Network Slices. We
> appear to be down to a choice between “Network Resource Group” and “Network
> Resource Partition”.
>
>
>
> I do not personally have a strong feeling on this. I think that
> “partition” is a slightly better word because it implies no sharing between
> sets of resources, and it may better cover statistical use of resources
> (e.g., you have 10% of the total bandwidth, not exactly that 10% of the
> bandwidth). But “group” is a perfectly fine word.
>
>
>
> Opinions please.
>
>
>
> Adrian
> _______________________________________________
> Teas mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/teas
>


-- 
___________________________________________
Luis M. Contreras
[e-mail]
[e-mail]
Global CTIO unit / Telefonica