Ingress PE                   Egress PE
         +-------------------+        +------------------+
         |                   |        |                  |
         |    +-> IP-VRF ----|---->---|-----> IP-VRF -+  |
         |    |              |        |               |  |
         |   BT1        BT2  |        |  BT3         BT2 |
         |    |              |        |               |  |
         |    ^              |        |               v  |
         |    |              |        |               |  |
         +-------------------+        +------------------+
              ^                                       |
              |                                       |
        TS1->-+                                       +->-TS2