OFPST_PORT reply (xid=0x2): 9 ports
  port 20: rx pkts=3, bytes=270, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=8, bytes=616, drop=0, errs=0, coll=0
  port  1: rx pkts=0, bytes=0, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=0, bytes=0, drop=?, errs=?, coll=?
  port 18: rx pkts=4, bytes=356, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=8, bytes=616, drop=0, errs=0, coll=0
  port 17: rx pkts=33, bytes=3796, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=33, bytes=4694, drop=0, errs=0, coll=0
  port 14: rx pkts=28, bytes=3390, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=28, bytes=4343, drop=0, errs=0, coll=0
  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 19: rx pkts=16, bytes=1620, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=9, bytes=1352, drop=0, errs=0, coll=0
  port 15: rx pkts=3, bytes=270, drop=0, errs=0, frame=0, over=0, crc=0
           tx pkts=8, bytes=616, drop=0, errs=0, coll=0
  port 16: rx pkts=175, bytes=20207, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=94, bytes=11678, drop=?, errs=?, coll=?
