OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ce:99:84:a7:14:f9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:7a:eb:93:7a:76:70
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:f6:31:ea:6e:ca:d4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:1c:36:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:1c:36:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
