OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:b2:37:b9:86:56:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:26:c3:4d:e8:35:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:62:ce:ed:e2:d8:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:2d:ea:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:2d:ea:8e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
