OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:46:a4:cc:aa:42:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:c2:75:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:62:af:9d:c1:40:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:46:a9:16:1c:de:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c2:75:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
