OFPST_PORT reply (xid=0x2): 4 ports
  port  1: rx pkts=29, bytes=2422, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=15, bytes=1550, drop=?, errs=?, coll=?
  port  2: rx pkts=57, bytes=5118, drop=?, errs=?, frame=?, over=?, crc=?
           tx pkts=89, bytes=8094, 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=1, bytes=66, drop=?, errs=?, coll=?
