OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:b2:14:44:c0:ce:16
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:e2:e8:3b:38:2c:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:4a:91:6e:82:4a:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:dd:4f:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:dd:4f:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
