--------------
  | Network      |
  | Slice        |
  | Orchestrator |
   --------------
    | IETF Network Slice
    | Service Request
    |                       Customer view
....|................................
   -v-------------------    Operator view
  |Controller           |
  |  ------------       |
  | | IETF       |      |
  | | Network    |      |--> Virtual Network
  | | Slice      |      |
  | | Controller |      |
  | | (NSC)      |      |
  |  ------------       |
..|     | Network       |............
  |     | Configuration |   Underlay Network
  |     v               |
  |  ------------       |
  | | Network    |      |
  | | Controller |      |
  | | (NC)       |      |
  |  ------------       |
   ---------------------
    | Device Configuration
    v