OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:5f:d6:78
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:be:5a:c7:b1:f9:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:96:0c:26:cf:e4:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:16:d4:25:37:d4:32
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:5f:d6:78
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
