OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:b6:f7:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ba:77:c5:2c:2d:61
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:de:c1:4c:fe:12:ec
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:96:b2:5d:2c:04:85
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b6:f7:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
