OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:69:1c:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:02:da:b2:46:19:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:0e:8d:49:ba:de:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:e6:0b:77:ed:46:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:69:1c:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
