OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:3e:84:7e:6c:bd:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:9e:58:e5:15:c0:ff
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:3e:65:af:88:96:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:99:e7:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:99:e7:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
