OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:56:d5:8f:c6:12:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:e2:0b:de:90:56:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:9e:48:9b:14:e3:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(enp1s0): addr:52:54:00:45:2a:50
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:45:2a:50
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
