OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:f6:b9:3f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:26:8d:1c:83:14:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:a6:02:36:99:7d:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:1e:89:93:1a:ca:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:f6:b9:3f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
