lo0: 2001:db8:0:200::1 (RP address)
                          |   +-------+   |                       
                          |   | Router|   |                       
                    eth21 +---+  R2   +---+ eth23                 
                          |   | (RP)  |   |                       
                          |   +-------+   | lo0: 2001:db8:0:300::1
           |  +-------+   |               |   +-------+  |
           |  | Router|   |               |   | Router|  |
     eth10 +--+  R1   +---+ eth12   eth32 +---+  R3   +--+ eth30
           |  |       |   |               |   |       |  |
           |  +-------+   |                   +-------+  |
+-------+  |              |   +-------+                  |  +-------+
|       |  |              |   | Router|   |              |  |       |
|       +--+              +---+  R4   +---+   +-------+  +--+       |
|       |  |              |   |       |   |   | Router|  |  |       |
+-------+  |              |   +-------+   +---+  R5   |  |  +-------+
 Source                                   |   |       |      Receiver
                                          |   +-------+