OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:11:b3:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:da:4c:c9:b1:80:a7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ea:1c:c7:48:b5:ec
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:d6:dc:2d:c5:79:df
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:11:b3:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
