To WAN                           To WAN
              ^                                ^
              |                                |
           +-----+                          +-----+
+----------| PE1 |-----------+   +----------| PE1 |-----------+
|          +--^--+           |   |          +--^--+           |            
|             |    IP Fabric |   |             |    IP Fabric |
|             PE             |   |    (S1,G1)  |OIF to G1     |
| +----PE->+-----+ No State  |   |      IIF +-----+ OIF to G1 |
| | +---2->|Spine|------+    |   |   +------>Spine|------+    |
| | | +-3->+-----+      |    |   |   |      +-----+      |    |
| | | |       2         3    |   |   |PIM      |OIF to G1|    |
| | | |IR     |         |    |   |   |tree     |         |    |
|+-----+   +--v--+   +--v--+ |   |+-----+   +--v--+   +--v--+ |
+| NVE1|---| NVE2|---| NVE3|-+   +| NVE1|---| NVE2|---| NVE3|-+ 
 +--^--+   +-----+   +-----+      +--^--+   +-----+   +-----+
    |         |         |            |         |         |   
    |         v         v            |         v         v
   TS1       TS2       TS3          TS1       TS2       TS3