[c-nsp] Cisco 7201 (G2) Traffic Performance (High CPU Utilization)

[Sam Silvester]

As with others, it's been a while since I've worked on this platform (we
were running 12.2SR train generally).

Having said that, I agree that for some reason the 7201 did show higher CPU
for the same traffic level as other platforms - but as mentioned we found
it levelled off with increasing traffic.

I'd suggest just watching the CPU closely as traffic grows, 35% isn't a
scary number, even if it is high for 200Mbps.

On Thu, Oct 16, 2014 at 2:34 AM, Roland Dobbins <rdobbins at arbor.net> wrote:

>
> On Oct 15, 2014, at 10:41 PM, Nick Hilliard <nick at foobar.org> wrote:
>
> > If the CPU load is high, then check to see what's causing it.
>
> His sh proc c output snippet indicates that almost all his CPU usage is
> interrupts - on a software-based platform, that's indicative of pps,
> whether directed to the box or through the box.
>
> Is this router on the Internet, or on a private WAN?
>
> Can you enabled NetFlow on the router and take a look at the contents of
> the NetFlow cache?  No, the additional CPU is not a big deal, it's
> single-digit.
>
> Take a look at this preso:
>
> <https://app.box.com/s/mnshn99c13uekrggy99b>
>
> sh proc c | e 0.00 would be helpful.
>
>
> ----------------------------------------------------------------------
> Roland Dobbins <rdobbins at arbor.net> // <http://www.arbornetworks.com>
>
>                    Equo ne credite, Teucri.
>
>                           -- Laocoön
>
>
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