OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:f6:d1:d1:01:f4:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:d8:d6:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ce:37:5c:63:0e:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:5a:3b:f2:58:1c:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:d8:d6:4f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
