John,
> Are you sure about that? What NIC are you using? I'm using the Intel 82599. I saw this in the datasheet regarding Flow Director: "The 82599 supports masking / range for the previously described fields. These masks are defined globally for all filters in the FDIR?M register." Additionally, on the DPDK side, you can only specify the bit masks for Flow Director once, when invoking rte_eth_dev_configure(). When adding an individual filter via struct rte_eth_fdir_filter, there is no option to apply a mask. If this understanding is wrong, please let me know. (I hope it is!) Matthew, Thanks for the information -- I will look through those painful discussions and the techniques you suggested. Cody
