OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:de:84:8e:93:27:3c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:3a:37:bc:9b:61:65
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(enp1s0): addr:52:54:00:33:6b:0c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:7a:21:e1:97:0c:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:33:6b:0c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
