Re: cpu impact of netflow export ?

[Al Reuben <alex () nac net>]

We noticed a *minor* increase in CPU. Ie, a 7206 moving around about 10 to
12 mb/s on average, with 8 ethers, 8 T1', 2 HSSIs, and one fast ether, on
a NPE-150 with 128 Megs, about 12 peers (5 of which are fairly active),
two full views, running 11.1.17CA, was doing around 30% on average. With
NetFlow on every interface, it moved up to about 36%. FYI, CEF was about
24%.

'sho proc c' shows most of the CPU going to IP Input:
                                                                                                               
CPU utilization for five seconds: 34%/32%; one minute: 36%; five minutes: 36%
 PID  Runtime(ms)  Invoked  uSecs    5Sec   1Min   5Min TTY Process 
  17   150791508  36649565   4114   0.32%  0.46%  0.48%   0 IP Input 





On Fri, 15 May 1998, Dave Curado wrote:

> Does anyone have any data points they'd share regarding
> the impact of netflow export on cpu load?  I'd like to
> capture all of my netflow stats, but I'm worried about
> scalability.
>
> Thanks,
> davec

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