[c-nsp] C3560X Layer 3 throughput

[David Wilkinson]

Hi All,

Quick update, It turns out that redirects were getting punted up to the 
CPU even with "no ip redirects" in the config.
Split up the ranges on to 2 separate VLANs and the CPU dropped to 10% 
with 0% interupts.

Thanks for your help.

Regards

David



On 17/02/2016 03:55, Adam Baxter wrote:
> Looks normal to me. your interrupt is only 6% ~ .
>
> they sit around 50%~ CPU. It will not cause any problems.
>
> This is of my 3750x Switches.
>
> CPU utilization for five seconds: 54%/4%; one minute: 48%; five 
> minutes: 47%
>
> Take a look at the following.
>
> http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/cpu_util.html#wp999591
>
> "We consider anything below 50 percent CPU utilization to be 
> acceptable. A sustained level of approximately 50 percent, such as 
> this example, is also acceptable."
>
> Regards,
>
> Adam.
>
> On 17 February 2016 at 04:59, David Wilkinson 
> <cisco-nsp at noroutetohost.net <mailto:cisco-nsp at noroutetohost.net>> wrote:
>
>     CEF is enabled, it was the first thing I checked.
>
>
>     On 16/02/2016 18:17, Hunter Fuller wrote:
>
>         Don't worry about that kind of cpu on these boxes. We have
>         dozens in
>         production doing only layer 2 traffic and we see usage like this:
>
>         CU234C3560XU01#show proc cpu | inc CPU
>         CPU utilization for five seconds: 41%/6%; one minute: 40%;
>         five minutes: 40%
>
>         CCRH120C3560XU01#show proc cpu | incl CPU
>         CPU utilization for five seconds: 43%/3%; one minute: 39%;
>         five minutes: 36%
>
>         CV108c3560Xu01#show proc cpu | incl CPU
>         CPU utilization for five seconds: 48%/10%; one minute: 43%;
>         five minutes: 41%
>
>     Is that with high levels of throughput?
>     This one is doing layer 3 routing.
>
>
>     On 16/02/2016 18:35, Octavio Alvarez wrote:
>
>         On 02/16/2016 03:53 AM, David Wilkinson wrote:
>
>             Hi all,
>
>             What is the real world expected throughput on the C3560X
>             devices when
>             doing basic Layer 3 routing?
>             We have a customer who has a couple of these and are doing
>             around
>             50-60Mpbs, around 10Kpps and is hitting around 50% CPU and
>             we are
>             wondering if this is normal for these switches as it seems
>             a little high
>             to us.
>
>             The configuarion is very basic, couple of VLANs, HSRP and
>             a static route
>             providing a default route upsteam.
>
>             Is this normal for the WS-C3560X-24?
>
>         What is the process at fault? (show proc cpu sort and check
>         the first
>         lines).
>
>     It is mostly interrupt.
>
>
>
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