OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:46:79:a7:f0:4f:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:b6:30:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:4a:ae:03:c3:34:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:3e:de:67:ed:55:ae
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b6:30:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
