[c-nsp] Netflow / 3560 platform

[Brian Spade]

Thanks for your responses.  I thought it was Cisco's evil plan to make
customers purchase the more expensive 650x line of switches for Netflow :-)

/b

On Fri, Aug 1, 2008 at 8:38 AM, David Curran <dcurran at nuvox.com> wrote:

> Agreed, and not to beat a dead horse, but there are mechanisms to send full
> packets to the processor and still circulate packets via the switch path
> for
> forwarding.  My point is that a switch that has a reported 720G throughput
> most likely does not have the processor to do netflow on all of that.
>
> That was my point about comparing a switch to a router.    OK, I promise,
> I'm done ;)
>
>
> > From: Adam Armstrong <lists at memetic.org>
> > Date: Fri, 01 Aug 2008 14:04:50 +0100
> > To: David Curran <dcurran at nuvox.com>, <cisco-nsp at puck.nether.net>
> > Subject: Re: [c-nsp] Netflow / 3560 platform
> >
> > David Curran wrote:
> >> Touche.  I was speaking of the smaller catalyst platforms.  However I'm
> not
> >> sure its fair to real routers to call the Supervisors route processors.
> >> That's like calling a Yugo a race car.  Sure, you COULD race it...
> >>
> > Look at the specs of the RSP-720. It would be a lot faster at software
> > forwarding than all of the devices
> >  mentioned earlier. (it'd probably be similar speed to the NPE-G2, I
> guess)
> >
> > The issue is that the switch architecture makes it very hard to
> > accurately track and record the information needed for netflow. This
> > information is stored in TCAM, which is already scarce enough on those
> > platforms!
> >
> > adam.
>
>
>
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