# speed    cable   size      xon      xoff      threshold
   1000    5m      35840     18432    17408     0
  10000    5m      36864     18432    18432     0
  25000    5m      36864     18432    18432     0
  40000    5m      36864     18432    18432     0
  50000    5m      37888     18432    19456     0
 100000    5m      38912     18432    20480     0
 200000    5m      41984     18432    23552     0
   1000    40m     36864     18432    18432     0
  10000    40m     38912     18432    20480     0
  25000    40m     41984     18432    23552     0
  40000    40m     45056     18432    26624     0
  50000    40m     47104     18432    28672     0
 100000    40m     59392     18432    40960     0
 200000    40m     81920     18432    63488     0
   1000    300m    37888     18432    19456     0
  10000    300m    53248     18432    34816     0
  25000    300m    78848     18432    60416     0
  40000    300m    104448    18432    86016     0
  50000    300m    121856    18432    103424    0
 100000    300m    206848    18432    188416    0
 200000    300m    376832    18432    358400    0