OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:9e:00:c0:8d:f3:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:cb:c5:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:3e:de:92:ee:14:75
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:26:24:c8:ea:34:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(vlan23): addr:2a:37:64:66:78:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:cb:c5:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
