OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:a5:84:c3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:76:dc:36:82:c0:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:a6:31:bd:88:3e:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:fe:ba:e7:7b:11:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:a5:84:c3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
