OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:c3:58:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:f2:ac:8e:60:ce:61
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:9e:2d:96:18:1f:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:86:8e:14:61:e8:e4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c3:58:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
