OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:5a:da:81:df:26:80
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:72:fe:64:f2:ee:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:84:28:29
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8e:e9:54:5d:89:07
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:84:28:29
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
