OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:7a:c1:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:fe:4b:18:63:73:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:8a:79:5a:84:af:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:82:cf:1b:0d:11:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:7a:c1:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
