OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:aa:a0:e6:e3:71:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:23:86:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:56:e1:ec:31:3e:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ba:cb:1d:99:da:3f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:23:86:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
