OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:56:d6:77:36:3b:79
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:d9:1a:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:6e:3c:0e:82:52:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:66:68:9c:75:8d:0f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:d9:1a:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
