OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:69:b2:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:4a:b6:ce:20:67:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:f2:ff:24:a1:02:ea
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ca:27:06:ec:ba:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:69:b2:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
