OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:56:5f:5e:4d:fb:cc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:12:99:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:f6:21:e6:e7:a5:68
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:0a:60:84:c5:f2:d0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:12:99:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
