OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:1a:08:42:40:de:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:72:d1:eb:ea:1b:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(eth1): addr:fa:16:3e:1d:a8:3d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan22): addr:9e:1e:2a:c2:12:30
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:1d:a8:3d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
