OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:79:dc:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:d6:3f:b8:25:4e:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:f6:15:e9:41:19:92
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:e6:05:39:b5:ba:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:79:dc:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
