OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:52:ff:40:c6:d8:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:2e:5d:af:7f:c6:fb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:52:64:6f:71:af:15
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:bb:ac:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:bb:ac:82
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
