OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:01:80:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:12:86:21:d6:d8:13
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:46:12:6c:0d:b3:63
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:96:5d:24:9f:a9:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:01:80:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
