OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:4a:b5:2b:e6:50:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:86:a7:fa:ef:67:88
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:b2:49:31:82:d1:52
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:97:7c:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:97:7c:c2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
