OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:e1:dd:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:b2:ea:c3:2b:c6:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:c2:ca:5a:eb:36:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ae:dd:fd:e4:51:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e1:dd:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
