+------+
                  |      |
       +----------+  MX1 +-------------+
       |          |      |             |
       |          +------+             |
       |          +------+             |
       |          |      |             |
       |          | MX2  |             |
EBGP   |   +------+      +--------+    |
       |   |      +------+        |    |
       |   |                      |    |
       |   |                      |    |
       |   |EBGP             EBGP |    |EBGP
       |   |                      |    |
       |   |                      |    |
 +-----+---+-+                   ++----+------+
 |           |                   |            |
 |           |       EBGP        |            |
 |   Cluster1+-------------------+  Cluster2  |
 |           |                   |            |
 +-----------+                   +------------+