OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:a6:92:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:3e:3e:c2:b2:1c:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:e6:7a:53:01:84:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:a6:c1:47:5b:d4:7e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a6:92:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
