OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:d8:c1:25
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:d2:d6:86:8f:c3:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:6a:13:2c:2a:3c:32
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ce:44:73:09:4b:07
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d8:c1:25
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
