OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:e2:4b:96:44:19:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:12:05:2a:cf:4a:15
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:f6:36:8f:52:46:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:fb:d1:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fb:d1:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
