OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:4a:c6:31:6b:7d:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:83:d4:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:a2:5e:b8:0a:a4:4e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:aa:b6:da:ac:b4:c5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:83:d4:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
