OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:6b:72:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:16:60:cb:dc:92:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:9e:16:f9:8a:fe:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:2e:af:7c:7a:b8:27
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:6b:72:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
