OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:e6:48:4e:7c:5a:6d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:a6:b3:12:db:e0:23
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:e4:ef:86
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:ce:b4:bf:3b:94:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:e4:ef:86
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
