OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:30:91:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:4e:92:f0:1f:5c:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:d6:bc:a9:3a:8c:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:36:f9:8f:d5:38:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:30:91:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
