To stress Opensips I strongly recommend you to use a very very good PC to
run Sipp, otherwise I think you will reach Sipp limits before Opensips
limits.....

For your problem, first thing is to check the cpu usage and load average
during your test, if they are high probably Sipp is having trouble to handle
the messages..... also you can try to run with a lower call rate to see if
the errors stop.... if all this is true then go for a better PC

Have you seen this?
http://www.opensips.org/Resources/StressTests
Opensips is very strong in stress tests!




On Mon, Sep 12, 2011 at 11:32 AM, Luis Morales <luisalfredo_m...@hotmail.com
> wrote:

>  Greetings,
>
> I'm trying to use SIPp to perform a stress test on a SIP proxy Server ( I'm
> using Opensips as a Proxy Server), but with a low CPS (starting with 200
> CPS)  I'm getting a lot of unexpected messages errors in SIPp. I used
> -trace_err to see what the error where, and basically it's receiving some
> responses that it did not expect, such as receiving and ACK while expecting
> and OK. I've also used Wireshark to analyze what was going on, and I saw
> that the proxy was apparently working fine, so I'm wondering if i have to
> modify the SIPp scenarios for it to work, or what else could I be doing
> wrong? (I've tried the defaults SIPp scenarios, and I've also modified them,
> and I've always get the same results).
>
>
> Thanks,
> Luis Morales.
>
>
> ------------------------------------------------------------------------------
> Doing More with Less: The Next Generation Virtual Desktop
> What are the key obstacles that have prevented many mid-market businesses
> from deploying virtual desktops?   How do next-generation virtual desktops
> provide companies an easier-to-deploy, easier-to-manage and more affordable
> virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/
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Doing More with Less: The Next Generation Virtual Desktop 
What are the key obstacles that have prevented many mid-market businesses
from deploying virtual desktops?   How do next-generation virtual desktops
provide companies an easier-to-deploy, easier-to-manage and more affordable
virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/
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