OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:e2:35:76:2a:65:47
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:46:43:f6:53:c4:0f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:ee:2c:9f:22:43:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:3c:77:37
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:3c:77:37
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
