OFPST_PORT reply (xid=0x2): 4 ports
  port  1: rx pkts=31, bytes=2622, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=104, bytes=8138, drop=?, errs=?, coll=?
  port  2: rx pkts=89, bytes=6604, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=52, bytes=4256, 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=0, bytes=0, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=0, bytes=0, drop=?, errs=?, coll=?
