OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:71:1c:65
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:a2:e5:51:88:ce:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:0e:c3:f3:46:45:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:62:d6:19:83:05:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:71:1c:65
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
