Whant to ask about implementation of Intel flow director technology with intel 82599 chip.
When driver compiled and loaded with Flow Director - we can use up to 32000 hardware filtrers with 0% CPU load !!!!!
In linux we need just add needed rules to /proc/net/pf_ring/dev section
Very good description of this technology you may find there http://downloadmirror.intel.com/14687/eng/README.txt
and there http://www.ntop.org/TNAPI_HwFiltering.html
Whaiting for answer from Normis and mikrotik !! )