OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:fa:12:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:1a:93:c0:fa:2f:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:46:0a:87:a3:4c:a7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ce:14:1a:93:2b:7c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:fa:12:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
