OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:b4:25:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ce:8b:7f:81:60:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:86:a5:1c:1f:83:c1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:8e:cb:21:f3:80:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b4:25:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
