OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:8d:d7:69
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:82:26:e1:7c:d6:8c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9a:0b:19:92:31:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:5e:18:91:d3:ed:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:8d:d7:69
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
