OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:2a:e3:a4:2d:e7:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:da:00:a5:06:ac:5b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:4e:77:da:e7:d5:eb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:ba:56:a5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:ba:56:a5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
