OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:42:91:f1:9f:ea:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:62:51:c5:22:c1:9f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:02:6f:32:8e:53:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan23): addr:9e:95:f1:ca:88:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(eth1): addr:fa:16:3e:f6:74:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:f6:74:f4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
