OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:12:9a:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:0a:20:76:3e:68:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:2a:49:be:1f:ea:0e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan23): addr:26:ce:85:30:9c:b2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(vlan20): addr:ae:b7:4b:eb:f4:d9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:12:9a:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
