I've responded inline below.  Most of the functionality is already there 
if you use our driver from e1000.sf.net.  We should have the updated 
network flow classifier interface added for the next release of the 
driver and we are currently hoping to make it into the 2.6.40-rc kernels 
for support in the in-kernel driver.

Thanks,

Alex

On 05/17/2011 01:54 PM, David Lawless wrote:
> Hello,
>
> I'd like to try out the Flow Director feature with an 82599 but
> see that it's bleeding-edge and the feature is a bit in flux.
Currently it isn't that the features are in flux as much as the 
interface itself is in a state of flux.  Specifically we are moving the 
interface over to network flow classifier from the current ntuple 
interface.  The reason for this change is to address several issues we 
had with displaying filters.

> Should I wait for the new filter approach or can I try it now?
> Want to direct incoming multicast UDPv4 traffic to specific
> queues by destination address.  Packets are *never* fragmented
> and MTU is 1500.
You could start using the current driver from e1000.sf.net now and it 
should allow for most of the functionality you are looking for.  The 
only limitation is that you will not be able to display the filters once 
you have entered them since there is currently a bug in the display 
function for ntuple filters within the kernel.

> If it's reasonable to try it out now, which kernel would be best
> to work with?  Better scheduler performance and more stable and
> older are better from my perspective, in that order.  I doubt it,
> but are there any distros-supported kernels that can be used?
> Just checked the RHEL6 VM and see that 'ethtool' does not
> support the -U/-u switches.
Any kernel 2.6.33 or later should support ntuple filters, however I 
would recommend using our latest ixgbe driver from e1000.sf.net as this 
addresses a number of issues which have been found in the ntuple filter 
functionality.  However as I stated earlier the one limitation is that 
you will not be able to display the filters once they have been entered.

> Thanks!
>
> David

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