OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:8d:96:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:3a:8e:b9:1c:94:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:fa:9e:f3:71:ab:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:5e:43:f1:dd:31:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:8d:96:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
