+---------------------------------------------------+
 (                      Operator's                     )
 (                         core                        )
  +---------------------------------------------------+
            |                               |
    +---------------+     tunnel    +---------------+
    |   IP  stack   |===============|   IP  stack   |
    +---------------+               +-------+-------+
    |    mn1mar1    |--+ (DLIFs) +--|mn1mar1|mn1mar2|--+
    +---------------+  |         |  +-------+-------+  |
    | phy interface |  |         |  | phy interface |  |
    +---------------+  |         |  +---------------+  |
          MAAR1       (o)       (o)       MAAR2       (o)
                                   x                 x
                                     x             x
                        prefA::/64     x         x   prefB::/64
                      (AdvPrefLft=0)     x     x
                                           (o)
                                            |
                                         +-----+
                             prefA::MN1  | MN1 |  prefB::MN1
                            (deprecated) +-----+