OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:56:93:d3:c1:36:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:2e:95:24:4b:a6:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:26:6a:63:2a:b9:cc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:9d:f0:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:9d:f0:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
