OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:13:9e:97
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:66:a0:a9:b7:83:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:9a:e4:b4:b5:a5:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:76:89:3a:77:cd:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:13:9e:97
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
