OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:8a:cd:db:d0:05:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:02:15:de
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:f6:41:18:67:bf:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:de:8e:7a:08:9d:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:02:15:de
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
