OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:d6:49:0c:05:bb:61
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:9a:a2:fb:f2:f1:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:12:e5:e9:cf:9a:df
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:da:00:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:da:00:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
