OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:82:18:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:0a:e4:f7:cc:dd:59
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:92:a8:07:0f:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:d6:96:54:de:de:c5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:82:18:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
