+--------+
		   | Sender |
		   +---+----+        Multicast-enabled
		       |              Sending Network
	   +-----------|-------------------------------+
	   |           v                               |
	   |    +------------+     +=======+ +=======+ |
	   |    | Agg Router |     |  AMT  | |  AMT  | |
	   |    +------------+     | relay | | relay | |
	   |           |           +=======+ +=======+ |
	   |           |               |         |     |
	   |     +-----+------+--------+---------+     |
	   |     |            |                        |
	   | +--------+   +--------+                   |
	   | | Border |---| Border |                   |
	   | | Router |   | Router |                   |
	   | +--------+   +--------+                   |
	   +-----|------------|------------------------+
		 |            |
		 v            v
		    Internet
		 (non-multicast)