OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:69:5e:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:be:48:a6:d8:19:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:36:69:0b:0b:1b:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:06:5b:ad:7b:e0:b6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:69:5e:c6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
