OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:3a:dd:6e:f8:53:e8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:30:53:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:82:84:50:81:dc:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8a:f9:70:de:b6:08
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:30:53:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
