Re: Linux based router for Gigabit traffic

[Anantha Kiran <ananth.kandukuri@gmail.com>]

No, we are not using NAPI for this. But we wrote a net_hook module
which catches the pkts before allowing it to go upper layers.

CPU utilization is 70+ while dropping.

Can u tell me the configuration of your low-end machine.Like PCI-bus,
and others.


On Sun, 22 Aug 2004 08:59:14 -0400 (EDT), alex@pilosoft.com
<alex@pilosoft.com> wrote:
> > I am doing a project, in which i have to redirect traffic coming from
> > one ethernet card of a machine, to one of three remaining three ethernet
> > cards of same machine based on the src,dest IP and Port values of the
> > pkt. I wrote a net_hook module to do this which i working fine for lower
> > speeds like < 400 Mbps traffic. But project goal is to deal with gigabit
> > traffic. I have used gigabit ethernet cards and Switch. But when the
> > traffic rate is more than 400Mbps it is dropping packets.  I did test,
> > by increasing the transmit queue length. But same problem is coming. I
> > have found during the pkt drop there is no memory or CPU is hundred
> > percently utilised. So, what can be the resource that is lacking while
> > dropping of pkts is happend.
> Are you using NAPI?
> 
> What is the CPU utilization when packets start being dropped?
> 
> I route full GE worth of traffic on a low-end machine without a problem.
> 
> -alex
> 
> 


-- 
K.AnanthaKiran
D-108/HALL-7