OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:90:69:b6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ca:75:eb:7e:f2:72
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:22:80:32:71:23:9f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:6e:fb:5d:78:9b:95
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:90:69:b6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
