OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:91:d8:e9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:62:f8:74:7d:84:0d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:32:5b:cf:3c:ab:f5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:46:6d:c2:27:a9:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:91:d8:e9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
