+-------+
                          | bond0 |
        +----------+      +-------+      +----------+
        |      ppp0+------+-gre0--+------+          |
        | APU  ppp1+------+-gre1--+------+  SERVER  +--> Internet
        |      ppp2+------+-gre2--+------+          |
        +----------+      +-------+      +----------+



.