4 networks = network1, network2
7 xml_file = machines/alice/machine.xml
8 snapshot_xml_file = machines/alice/snapshot.xml
11 xml_file = machines/bob/machine.xml
12 snapshot_xml_file = machines/bob/snapshot.xml
15 xml_file = network/network1/network.xml
18 xml_file = network/network2/network.xml