[netperf-talk] Generating network traffic on a dual port NIC with a single computer using netperf???

[Jesse Brandeburg]

On Thu, 2010-12-09 at 17:07 -0800, Rick Jones wrote:
> Werner Hoehenrieder wrote:
> > I’m trying to use netperf to send out a traffic stream from one port of 
> > a NIC card (10Gb/sec NIC)  to the other port of the card (dual port 
> > 10Gb/sec NIC).
> >  
> > I want to do this on a single computer –  not separate netserver and 
> > netperf systems.
> 
> You can't.  And the reason has nothing to do with netperf.  Virutally any TCP/IP 
> stack out there "knows" which IP addresses are local to it, and will internally 
> loopback traffic too/from those IPs without ever getting anywhere near a NIC, 
> perhaps not even getting anywhere near the driver.
> 
> There may be some patches to upstream Linux kernels to work around that, but 
> unless you are running an upstream Linux kernel, that may not do you much good.

google for "+linux send to self" 

some people have got it to work with some fancy netfilter rules too

Jesse
-- 
Jesse Brandeburg
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