OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:7a:1b:d9:08:c6:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:63:ba:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:6a:1a:65:e2:27:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:f2:9d:b5:76:97:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:63:ba:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
