OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:5d:05:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:12:b7:9b:53:f8:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:c2:3a:35:8c:11:07
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:16:3b:fd:d5:0c:75
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:5d:05:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
