OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:ee:8e:7c:0e:06:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:12:f8:96:37:0a:d3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:72:17:5c:cb:07:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:d4:76:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d4:76:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
