OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:8d:3e:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ce:da:d7:fa:07:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ce:b8:6a:2a:46:95
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:4e:84:54:52:a1:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:8d:3e:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
