OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:35:bf:4d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:9e:7f:35:70:ef:5c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:36:ba:6f:17:ab:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:22:48:9a:36:99:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:35:bf:4d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
