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