+ :param always_same_link: If True use always same link between two nodes
+ in path. If False use different link (if available)
+ between two nodes if one link was used before.
+ :param topo_has_tg: If True, the topology has a TG node. If False,
+ the topology consists entirely of DUT nodes.
+ :param topo_has_dut: If True, the topology has a DUT node(s). If False,
+ the topology consists entirely of TG nodes.