Freebsd IP Forwarding performance (question, and some info) [7-stable, current, em, smp]

Paul paul at
Tue Jul 8 01:20:40 UTC 2008

I read through the IGB driver, and it says 82575/6 only...  which is the 
new chip Intel is releasing on the cards this month 2 port
and october 4 port, but the chips are on some of the motherboards right now.
Why can't it also use the 82571 ? doesn't make any sense.. I haven't 
tried it but just browsing the driver source
doesn't look like it will work.

Mike Tancsa wrote:
> At 02:44 PM 7/7/2008, Paul wrote:
>> Also my 82571 NIC supports multiple received queues and multiple 
>> transmit queues so why hasn't
>> anyone written the driver to support this?  It's not a 10gb card and 
>> it still supports it and it's widely
>> available and not too expensive either.   The new 82575/6 chips 
>> support even more queues and the
>> two port version will be out this month and the 4 port in october 
>> (PCI-E cards).  Motherboards are
>> already shipping with the 82576..   (82571 supports 2x/2x  575/6 
>> support 4x/4x)
> Actually, do any of your NICs attach via the igb driver ?
>         ---Mike
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