OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:f9:6e:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:a6:3b:d3:4d:a4:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:16:84:9d:45:11:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:d6:bc:fd:a3:46:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f9:6e:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
