OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:b2:7e:ad:bf:5d:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:e1:64:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:e6:00:32:d1:21:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:32:4a:32:cd:22:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:e1:64:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
