OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:02:ef:6d:21:61:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:ed:9d:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:7e:f2:b2:dd:38:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6e:bc:bf:4f:1c:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:ed:9d:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
