OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:65:27:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:da:36:e6:72:20:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:e2:bf:1e:ef:bb:2d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:6a:a2:25:0b:99:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:65:27:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
