OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:92:83:34:54:fe:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:83:bc:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:66:76:b4:76:bb:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:5e:c2:52:da:bc:5e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:83:bc:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
