------------------------
      |       Controller       |
      | 2001:db8::198:51:100:1 |
       ------------------------
                    ------     ------        ------     ------
                   | SFI  |   | SFI  |      | SFI  |   | SFI  |
                   |SFT=41|   |SFT=42|      |SFT=41|   |SFT=43|
                    ------     ------        ------     ------
                         \     /                  \     /
                    -------------------     -------------------
                   |       SFF1        |   |       SFF2        |
                   |2001:db8::192:0:2:1|   |2001:db8::192:0:2:2|
                    -------------------     -------------------
               ----------
   Packet --> |          |                                    -->
   Flows  --> |Classifier|                                    -->Dest
              |          |                                    -->
               ----------
                   -------------------      -------------------
                  |       SFF3        |    |       SFF4        |
                  |2001:db8::192:0:2:3|    |2001:db8::192:0:2:4|
                   -------------------      -------------------
                         /     \                  /     \
                    ------     ------        ------     ------
                   | SFI  |   | SFI  |      | SFI  |   | SFI  |
                   |SFT=42|   |SFT=44|      |SFT=43|   |SFT=44|
                    ------     ------        ------     ------