OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:9f:51:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:3e:f3:ac:2f:7b:84
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:d2:33:57:d1:ec:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:c2:94:f3:4c:a4:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:9f:51:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
