+----------+
                       |    R1    | Root Node of the multicast LSP
                       +----------+
                           |9000 (link0)
                       +----------+
        Transit Node   |    R2    |
        branch         +----------+
                       *  |   *  *
                  9001*   |   *   *9002
               link1 *    |   *    *link2
        +-----------+     |   *     +-----------+
        |    R4     |     |   *     |    R5     | Transit Nodes
        +-----------+     |   *     +-----------+
                   *      |   *      *     +
                9003*     |   *     *      +9004
               link3 *    |   *    *       +link4
                     +-----------+  +-----------+
                     |    R3     |  |    R6     | Leaf Node
                     +-----------+  +-----------+
                      9005| link5
                     +-----------+
                     |    R8     | Leaf Node
                     +-----------+