OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:da:04:90:ef:39:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:d2:c6:1d:31:63:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:66:e5:2c:f8:c1:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:66:84:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:66:84:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
