OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ca:4f:13:02:e4:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:c6:59:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9e:b0:17:35:2e:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:0e:dc:2b:b7:45:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c6:59:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
