For reporting purposes, each source-destination pair is listed as one entry in the Network Reports > Demand Reports > Demand Path & Diversity report (PATHRPT) in the Report Manager.
Summary info is reported in the explanation portion of the report including the total number of multicast trees and bandwidth information. Click the Explanation... button for this summary info. An example is shown below:
* 1 MCtrees (Tree Bandwidth=100.000M), Average # of leaves=6.00 * 1 routed(Bandwidth=100.000M, average #link/tree=13.00)
Here, the leaves refer to the destination nodes of the multicast tree. The links per tree indicate the number of links used by the tree.