OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:cf:9f:3d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:5a:e2:c5:6c:02:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:02:04:87:43:31:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:5e:28:22:f4:b1:7f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:cf:9f:3d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
