OFPST_PORT reply (xid=0x2): 4 ports
  port  1: rx pkts=0, bytes=0, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=1, bytes=66, drop=?, errs=?, coll=?
  port  2: rx pkts=40, bytes=3476, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=51, bytes=5360, drop=?, errs=?, coll=?
  port LOCAL: rx pkts=0, bytes=0, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=0, bytes=0, drop=0, errs=0, coll=0
  port  3: rx pkts=8, bytes=712, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=22, bytes=1856, drop=?, errs=?, coll=?
