# detect which is the port 0
if min(if_pci0, if_pci1) != if_pci0:
if_key0, if_key1 = if_key1, if_key0
# detect which is the port 0
if min(if_pci0, if_pci1) != if_pci0:
if_key0, if_key1 = if_key1, if_key0
adj_node0, adj_if_key0 = Topology.get_adjacent_node_and_interface( \
nodes_info, dut_node, if_key0)
adj_node0, adj_if_key0 = Topology.get_adjacent_node_and_interface( \
nodes_info, dut_node, if_key0)