OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:0a:31:11:c1:a3:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:4e:2b:72:40:d5:4a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:6e:03:fa:9c:7d:5e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:8b:22:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:8b:22:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
