OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:7e:45:f1:c7:72:4d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:e2:0f:3d:7c:06:fe
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:d6:58:53:89:46:7a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:1e:3b:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:1e:3b:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
