LSP1 -->          LSP1 -->          LSP1 -->
   +-----+           +-----+           +-----+           +-----+
   |  A  +-----------+  B  +-----------+  C  +-----------+  D  |
   +-----+           +--+--+           +--+--+           +-----+
            <-- LSP2    |                 |     <-- LSP2
                        |                 |  
                        |                 |  
                     +--+--+           +--+--+
                     |  E  +-----------+  F  |
                     +-----+           +-----+
                             <-- LSP2