OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:b9:a5:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:da:43:fe:28:ba:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:82:1c:87:4a:88:46
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:aa:8c:f0:f7:18:a1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b9:a5:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
