^
                                    |Exported IOAM data
                                    |
                                    |
                                    |
              +--------------+------+-------+--------------+
              |              |              |              |
              |              |              |              |
User      +---+----+     +---+----+     +---+----+     +---+----+
packets   |Encapsu-|     | Transit|     | Transit|     |Decapsu-|
--------->|lating  |====>| Node   |====>| Node   |====>|lating  |---->
          |Node    |     | A      |     | B      |     |Node    |
          +--------+     +--------+     +--------+     +--------+
          Insert DEX       Export         Export       Remove DEX
          option and      IOAM data      IOAM data     option and
          export data                                  export data