OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:02:48:f0:5a:08:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:36:27:ab:fa:a1:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:22:f3:3d:8d:97:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:3d:fc:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:3d:fc:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
