OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:8a:02:5d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8e:89:ae:f7:05:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ae:e6:9f:2e:d9:c3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:e6:a5:22:ed:63:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:8a:02:5d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
