OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:86:5c:40:54:26:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:31:3c:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:a2:89:33:4e:b2:15
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:16:68:ef:79:e5:7c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:31:3c:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
