OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:c6:58:ba:f7:c9:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:56:c5:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:1a:d4:85:c1:b6:14
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:c2:9e:02:21:f1:86
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:56:c5:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
