OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:62:3e:db:b2:58:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:92:84:68:62:28:0d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:32:05:fd:ee:5a:c3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:d8:75:68
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:d8:75:68
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
