+-----------------+           +---------+----------+
  |     INTERNET    +-----------| safran.grenode.net |
  +-------+---------+           +---------+----------+
                                          |
                                 +--------+---------+
                                 |perceval.hadoly.fr|
                                 +--------+---------+
                                          |
                                +---------+----------+
                                |  karadoc.hadoly.fr |
                                |   +----+ +----+    |
                                |   |LXC1| |LXC2|    |
                                |   +----+ +----+    |
                                |   +----+ +----+    |
                                |   |LXC3| |LXC4|    |
                                |   +----+ +----+    |
                                |   +-----------+    |
                                |   |    LXD    |    |
                                |   +-----------+    |
                                +--------------------+