+ @staticmethod
+ def sort_vpci(traffic_gen):
+ """Return the list of external interfaces ordered by vpci and name
+
+ :param traffic_gen: (ProxTrafficGen) traffic generator
+ :return: list of ordered interfaces
+ """
+ def key_func(interface):
+ return interface['virtual-interface']['vpci'], interface['name']
+
+ return sorted(traffic_gen.vnfd_helper['vdu'][0]['external-interface'],
+ key=key_func)
+