+--------------------------| N100 |---------------------------------+
|                                                                   |
|  ====== link1====== link3------ link5====== link9------   ======  |
   ||N1||------||N2||------| N3 |------||N4||------| N5 |---||N7||
   ||  ||------||  ||------|    |------||  ||------|    |---||  ||
   ====== link2====== link4------ link6======link10------   ======
      |            |                      |                   |
   ---+--          |       ------         |                 --+---
   |CE1 |          +-------| N6 |---------+                 |CE2 |
   ------            link7 |    | link8                     ------        
                           ------