+-Classifier  +-Service Function Chain OAM
| OAM         |
|             |        ___________________________________________
|              \      /\          Service Function Chain          \
|               \    /  \      +---+      +---+     +-----+  +---+ \
|                \  /    \     |SF1|      |SF2|     |Proxy|--|SF3|  \
|      +------+   \/      \    +---+      +---+     +-----+  +---+   \
+----> |      |...(+->     )     |          |         |               )
       |Classi|    \      /   +-----+    +-----+    +-----+          /
       |fier  |     \    /    | SFF1|----| SFF2|----| SFF3|         /
       |      |      \  /     +--^--+    +-----+    +-----+        /
       +----|-+       \/_________|________________________________/
            |                    |               
            +-------SF_OAM-------+      
                                     +---+   +---+
                             +SF_OAM>|SF3|   |SF5|
                             |       +-^-+   +-^-+
                      +------|---+     |       |
                      |Controller|     +-SF_OAM+
                      +----------+
                           Service Function OAM (SF_OAM)