OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:6e:d6:e6:2e:e5:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ea:b9:d9:fd:7c:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:fe:bb:26:99:a9:b9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:06:89:cc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:06:89:cc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
