OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:fa:b6:3e:07:c3:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:de:8d:0b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ae:b6:e1:25:a2:a8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ba:4c:27:37:53:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:de:8d:0b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
