OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:f6:c0:f8:b3:20:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:46:35:b9:16:31:6c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:72:78:b1:27:eb:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan23): addr:06:4a:e3:88:7e:a3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(eth1): addr:fa:16:3e:0b:02:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:0b:02:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
