OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:b6:19:06:36:3e:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:0b:a0:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:06:59:b1:1a:95:97
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6e:c9:92:69:76:b9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:0b:a0:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
