OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:d2:d7:5b:88:cd:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:44:f9:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:a2:08:00:12:30:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6a:70:f4:a1:f8:ca
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:44:f9:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
