OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:02:ad:db:b1:ee:1d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:60:af:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:aa:57:f6:d2:4f:0d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:22:af:97:c8:1c:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:60:af:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
