L3SM    |     ^ 
                Service   |     |  Notifications
                 Model    |     |    
 +------------------------+------------------------+
 |               +--------V--------+               |
 |               | Service Mapping |               |
 |               +--------+--------+               |
 | Orchestrator           |                        |
 +------------------------+------------------------+
                    L3NM  |     ^ UNI Topology Model  
                   Network|     | L3NM Notifications    
                    Model |     | L3NM Capabilities     
 +------------------------+------------------------+
 |            +-----------V-----------+            |
 |            | Service Decomposition |            |
 |            +--++---------------++--+            |
 |               ||               ||               |
 | Controller    ||               ||               |
 +---------------++---------------++---------------+
                 ||               ||
                 ||     BGP,      ||
                 ||     QoS,      ||
                 ||   Interface,  ||
    +------------+|      NI,      |+------------+
    |             |      IP       |             |
 +--+--+       +--+--+         +--+--+       +--+--+
 | CE1 +-------+ PE1 |         | PE2 +-------+ CE2 |
 +-----+       +-----+         +-----+       +-----+