+------------+
                        |  Consumer  |
                        +------------+
                              ^
                              |
                              v
                    +-------------------+
                    |    BGP Speaker    |         +-----------+
                    | (Route Reflector) |         | Consumer  |
                    +-------------------+         +-----------+
                          ^   ^   ^                       ^
                          |   |   |                       |
          +---------------+   |   +-------------------+   |
          |                   |                       |   |
          v                   v                       v   v
    +-----------+       +-----------+             +-----------+
    |    BGP    |       |    BGP    |             |    BGP    |
    |  Speaker  |       |  Speaker  |    . . .    |  Speaker  |
    +-----------+       +-----------+             +-----------+
          ^                   ^                         ^
          |                   |                         |
         IGP                 IGP                       IGP