OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:e2:91:5c:c5:b1:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:a2:7b:2d:53:91:eb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:4e:fa:3a:03:94:65
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(eth1): addr:fa:16:3e:31:1c:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:31:1c:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
