OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:12:f2:04:f6:68:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:0b:69:d7:64:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:22:2f:73:0c:22:dd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:eb:7f:63
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:eb:7f:63
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
