OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:fa:28:9a:ee:fa:23
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:66:e3:aa:19:46:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:1e:70:76:4e:3d:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:03:92:91
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:03:92:91
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
