OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:56:d7:62:d5:18:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:bf:a5:a5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:8e:cd:6c:5b:4b:f5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:5e:2d:31:2b:a0:11
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:bf:a5:a5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
