--      --      --
                   |CE|    |CE|    |CE|
                    --      --      --
                  AC :    AC :    AC :
                  ----------------------       -------
                 ( |PE|....|PE|....|PE| )     ( IETF  )
IETF Network    (   --:     --     :--   )   ( Network )
Slice Service   (     :............:     )   (  Slice  )
Request          (  IETF Network Slice  )     (       )  Customer
  v               ----------------------       -------     View
  v        ............................\........./...............
  v                                     \       /        Provider
  v    >>>>>>>>>>>>>>>  Grouping/Mapping v     v           View
  v   ^             -----------------------------------------
  v   ^            ( |PE|.......|PE|........|PE|.......|PE|  )
 ---------        (   --:        --         :--         --    )
|         |       (     :...................:                 )
|   NSC   |        (        Network Resource Partition       )
|         |         -----------------------------------------
|         |                             ^
|         |>>>>>  Resource Partitioning |
 ---------        of Filtered Topology  |
  v   v                                 |
  v   v            -----------------------------      --------
  v   v           (|PE|..-..|PE|... ..|PE|..|PE|)    (        )
  v   v          ( :--  |P|  --   :-:  --   :--  )  (  Filter  )
  v   v          ( :.-   -:.......|P|       :-   )  ( Topology )
  v   v          (  |P|...........:-:.......|P|  )   (        )
  v   v           (  -    Filtered Topology     )     --------
  v   v            -----------------------------       ^
  v    >>>>>>>>>>>>  Topology Filter ^                /
  v        ...........................\............../...........
  v                                    \            /  Underlay
 ----------                             \          /  (Physical)
|          |                             \        /    Network
| Network  |    ----------------------------------------------
|Controller|   ( |PE|.....-.....|PE|......    |PE|.......|PE| )
|          |  (   --     |P|     --      :-...:--     -..:--   )
 ----------  (    :       -:.............|P|.........|P|        )
     v       (    -......................:-:..-       -         )
      >>>>>>> (  |P|.........................|P|......:        )
  Program the  (  -                           -               )
    Network     ----------------------------------------------