OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:d9:d1:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ba:53:f9:8c:8a:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:86:fa:8d:27:74:af
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:d6:05:2d:a9:b2:65
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d9:d1:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
