mac2 = ec.register_resource("ns3::StaWifiMac")
ec.set(mac2, "Standard", "WIFI_PHY_STANDARD_80211a")
ec.register_connection(dev2, mac2)
mac2 = ec.register_resource("ns3::StaWifiMac")
ec.set(mac2, "Standard", "WIFI_PHY_STANDARD_80211a")
ec.register_connection(dev2, mac2)