OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:a6:42:07:49:23:b5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:34:0b:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:c6:2b:c2:37:bf:e4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:96:69:0e:13:43:61
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:34:0b:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
