OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:fa:00:1e:85:f1:2d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:62:f7:19:60:bf:92
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:2e:e7:00:84:30:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:fe:7e:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fe:7e:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
