OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:42:7c:7e:fe:37:8b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:2e:7e:66:18:b2:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:22:35:31:f5:9c:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:ba:ec:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ba:ec:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
