+---------------+
                          |   Customer    |
                          +-------+-------+
          Customer Service Model  |
              e.g., l2vpn-svc     |
                          +-------+-------+
                          |    Service    |
                          | Orchestration |
                          +-------+-------+
           Network Model          |
        l2vpn-ntw + l2vpn-es      |
                          +-------+-------+
                          |   Network     |
                          | Orchestration |
                          +-------+-------+
    Network Configuration Model   |
                      +-----------+-----------+
                      |                       |
             +--------+------+       +--------+------+
             |    Domain     |       |     Domain    |
             | Orchestration |       | Orchestration |
             +---+-----------+       +--------+------+
  Device         |        |                   |
  Configuration  |        |                   |
  Model          |        |                   |
            +----+----+   |                   |
            | Config  |   |                   |
            | Manager |   |                   |
            +----+----+   |                   |
                 |        |                   |
                 | NETCONF/CLI..................
                 |        |                   |
               +--------------------------------+
                \            Network           /  
                 \                           /
+----+  Bearer    +----+              +----+         +----+
|CE A+ ---------- +PE A+              +PE B+ ------- +CE B|
+----+ Connection +----+              +----+         +----+

        Site A                                 Site B

NETCONF:  Network Configuration Protocol
CLI:  Command-Line Interface