TE1 ----------->
+--------+    +------+    +-----+    +-------+    +------+  +---+
|Access  |----|Access|----|AGG 1|----|AGG N-1|----|Core 1|--|SR1|
|SubNode1|    |Node1 |    +-----+    +-------+    +------+  +---+
+--------+    +------+       | |         | ^          |
    |   Access    |  Access  | AGG Ring 1| |          |
    |  SubRing 1  |  Ring 1  | |         | |          |
+--------+    +------+    +-----+        | |          |
|Access  |    |Access|    |AGG 2|        | |          |
|SubNode2|    |Node2 |    +-----+        | |          |
+--------+    +------+       | |         | |          |
    |             |          | |         | |          |
    |             |          | +---TE2---|-+          |
+--------+    +------+    +-----+    +-------+    +------+  +---+
|Access  |    |Access|----|AGG 3|----| AGG N |----|Core N|--|SRn|
|SubNodeN|----|NodeN |    +-----+    +-------+    +------+  +---+
+--------+    +------+