OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ea:13:1a:57:ad:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:e2:b7:61:35:77:7e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ba:2c:01:28:20:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:8c:54:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:8c:54:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
