OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:ba:c2:ec:af:0f:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:2e:53:c1:0b:22:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:6f:ae:0d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ce:0c:e9:5b:25:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:6f:ae:0d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
