[SR-Users] sipp and stateful transaction problem

[JR Richardson]

Hi All,

I'm doing some testing with kamailio 1.5:

kamailio1:/etc/kamailio# kamailio -V
version: kamailio 1.5.4-notls (i386/linux)
flags: STATISTICS, USE_IPV6, USE_TCP, DISABLE_NAGLE, USE_MCAST,
SHM_MMAP, PKG_MALLOC, F_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
MAX_URI_SIZE 1024, BUF_SIZE 65535, PKG_SIZE 4194304
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
svnrevision: 2:6005M
@(#) $Id: main.c 5608 2009-02-13 16:48:17Z henningw $
main.c compiled on 10:14:11 May 18 2010 with gcc 4.3.2

Using dispatcher module trying to load balance SIP calls across some
Asterisk servers.  I have it working fine when I test in this
scenario:

sip phone dial out><asterisk><kamailio><round robin to several asterisk servers

This works stateful and stateless, handles everything gracefully.

This scenario is giving me fits:

sipp dial out><kamailio><round robin to several asterisk servers

I get retransmits on every call back to sipp with errors like
"Discarding message which can't be mapped to a known SIPp call" and
"SIP/2.0 481 Call leg/transaction does not exist"

This happens with kamailio setup stateful or stateless.  I'm wondering
if sipp is the problem or just doesn't play well with kamailio?

I've kept the config as simple as possible for testing, it is listed
here http://pastebin.com/BZ8hJvJv

Here is my sipp usage:

sipp -sn uac 10.10.12.53 -i 10.10.14.97 -s 55 -d 7000 -l 10 -r 1 -trace_err

Any insight would be appriciated.

Thanks.

JR
-- 
JR Richardson
Engineering for the Masses