I can guess that your sip server gets overloaded and doesn't answer as
quickly as your scenario expects. However, this is just a guess. As is
said in my previous post, you should sniff the sip exchange and figure
out if ACK is correct according to SIP. If it is correct then, you
should read your scenario and figure out why the scenario doesn't expect
ACK.
BR, Dmitry
John Barry wrote:
Hi Dmitry,
I try to run the default scenarios (sipp -sn uas and sipp -sn uac)
between 2 machines (no proxy) and I am getting the same results. A lot
of unexpected messages and retransmissions errors when reaching 500 cps.
Why the unexpected messages? It seems like a synchronization issue.
JB
------------------------------------------------------------------------
Date: Thu, 12 Feb 2009 20:36:42 +0300
From: [email protected]
To: [email protected]
CC: [email protected]
Subject: Re: [Sipp-users] Aborting call on unexpected message error
Hi,
Apparently, your scenario doesn't expect ACK when it comes. You
should, probably, follow the sip exchange and figure out if ACK is
correct. If it is correct then fix your scenario.
HTH, Dmitry
John Barry wrote:
Hello,
I want to measure the performance of a OpenSER (1.3.2)proxy doing
digest authentication. In my test bed I have an OpenSER proxy and
two SIPp instances: one running the server scenario (uas), and the
other one a modified client scenario to support INVITE
authentication.
While testing, I have notice that there are a lot of unexpected
message errors and retransmissions when the load is relatively low
(400 cps). At 400 cps, the server nor the SIPp instances are close
to saturate their corresponding hardware resources. I have done
the same test before with a similar server, and I was able to
reach at least 3,000 cps
In the error log of the uas SIPp, I can see the following error:
"Aborting call on unexpected message for Call-Id
'[email protected] <mailto:[email protected]>': while
pausing (index 6), received
'ACK sip:[email protected] SIP/2..0"
I have tested with SIPp versions 3.0 and 3.1 and I get the same
behavior.
Any ideas regarding what could be causing this problem?
Thanks,
JB
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