OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:be:9e:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:d6:f7:69:a8:f2:7b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:6e:37:80:12:4a:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:de:89:02:b8:4a:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:be:9e:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
