OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:16:45:14:1b:b5:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:c3:6e:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:be:c3:e7:ed:ec:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ee:11:f0:4e:bf:94
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c3:6e:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
