OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:2a:28:69:d8:1d:25
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:fe:2b:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:3a:d0:f0:a0:64:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8e:d3:b2:e0:69:78
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fe:2b:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
