OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:02:d6:c5:56:65:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:c6:48:19:90:06:bd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:92:ea:b4:bc:c0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:55:fc:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:55:fc:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
