OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:23:af:ea
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:32:46:4f:93:9b:56
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:86:a7:e6:a3:a1:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:fa:ef:d4:e4:01:6a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:23:af:ea
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
