OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:26:10:71:2a:7c:2d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:12:e7:5d:77:ac:59
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:5e:a6:c5:fa:3b:fa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:4d:8d:7f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:4d:8d:7f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
