OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:52:44:d5:f3:d0:27
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:74:f1:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:a6:be:38:cf:19:8c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:76:6f:81:6c:cb:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:74:f1:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
