OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:0a:30:a4:4d:a8:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:5a:f4:1c:0d:b9:92
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:f6:cf:05:52:28:52
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:f5:f4:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f5:f4:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
