OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:ff:af:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:42:e4:51:26:9d:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ee:48:6e:7f:c5:13
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:b6:09:9b:79:4e:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ff:af:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
