+-----------------------+                   +-----------------------+
| +-------------------+ |   +-----------+   | +-------------------+ |
| | Emulated Router(s)| |   |           |   | | Emulated Router(s)| |
| |    (Optional)     | +----- DUT/SUT  +-----+    (Optional)     | |
| +-------------------+ |   |           |   | +-------------------+ |
| +-------------------+ |   +-----------+   | +-------------------+ |
| |     Clients       | |                   | |      Servers      | |
| +-------------------+ |                   | +-------------------+ |
|                       |                   |                       |
|   Test Equipment      |                   |   Test Equipment      |
+-----------------------+                   +-----------------------+