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