OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ce:f5:c0:02:b6:68
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:c4:3d:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:5a:9f:60:08:02:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:56:f6:23:52:a0:76
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c4:3d:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
