OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:4d:5d:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:6a:17:57:cd:45:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:5e:4d:20:0d:fb:03
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:5a:79:37:f7:4f:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:4d:5d:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
