OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:46:87:f4:07:da:1f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:2f:00:37
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:7e:2c:9d:4c:1d:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:fe:b9:d0:c5:f9:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:2f:00:37
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
