OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:af:f0:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:32:c5:ba:74:c3:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:da:af:a6:14:bf:56
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ee:ff:b1:3c:da:2d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:af:f0:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
