OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:e7:40:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:76:92:93:59:07:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:fa:31:d0:b5:96:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:5a:4e:ce:6e:ab:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e7:40:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
