OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:f6:36:3d:1b:d0:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:36:45:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:da:c3:7e:e9:fb:75
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:a6:50:ef:1f:16:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:36:45:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
