Domain 1 Abstract TE Topology 1  Domain 2 Abstract TE Topology 1

          +---+    +---+                  +---+    +---+
     -----|S13|----|S15|----          ----|S23|----|S25|----
          +---+\   +---+                  +---+   /+---+
                \                                /
                 \                              /
                  \+---+                  +---+/   +---+
                   |S18|----          ----|S24|    |S28|----
                   +---+                  +---+\  /+---+
                                                \/
                                                /\
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     -----|S19|----|S17|----          ----|S29|----|S27|----
          +---+    +---+                  +---+    +---+

     Domain 1 Abstract TE Topology 2  Domain 2 Abstract TE Topology 2

          +------------+                  +------------+
     -----|            |----          ----|            |----
          |            |                  |            |
          |    AN1     |----          ----|    AN1     |----
          |            |                  |            |
     -----|            |----          ----|            |----
          +------------+                  +------------+