+# What topology should be generated by the helper functions GNUNET_TESTBED_run()
+# and GNUNET_TESTBED_test_run(). This option has no effect if testbed is
+# initialized with other functions. Valid values can be found at:
+# https://gnunet.org/content/supported-topologies
+OVERLAY_TOPOLOGY = NONE
+
+# Number of random links to be included to the generate the above topology.
+# Note that not all topologies require this option and ignore it. Topologies
+# requiring this option are RANDOM, SMALL_WORLD and SMALL_WORLD ring.
+# OVERLAY_RANDOM_LINKS =
+
+# If the OVERLAY_TOPOLOGY is set to FROM_FILE. This option is ignored for all
+# other topology values. This option should contain the path to the file
+# containing the topology information. The format of the file is presented at:
+# https://gnunet.org/content/topology-file-format
+# OVERLAY_TOPOLOGY_FILE = /path/to/topology-file
+