OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:b6:a4:ba:d0:1c:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:1e:dc:95:f5:86:a3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:e2:13:66:23:7a:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:99:50:71
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:99:50:71
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
