[SR-Users] Kamailio IMS deployment

sainath.ellendula at wipro.com sainath.ellendula at wipro.com
Wed Feb 10 14:32:20 CET 2016

Hi Franz,

Thanks for your response.

We are not using "NAT" in our network instead of that using "Bridged".

As communication is not happening from P-SCF to I-CSCF, I don't see anything like forwarding to I-CSCF in kamailio-pcscf.cfg. Here do we have anything files like pcscf.xml as it is not available by default.

One more thing observed in tcpdump, In DNS answer getting IP of server.net1.test(, This might be issue that REGISTER request is trying to communicate with instead of Please any suggestions.

Please find attachments of Tcpdump, kamailio-pcscf.cfg and pcscf.cfg.

Thanks in advance!!


-----Original Message-----
From: Franz Edler [mailto:franz.edler at technikum-wien.at]
Sent: Tuesday, February 9, 2016 8:50 PM
To: Sainath Ellendula (NEP) <sainath.ellendula at wipro.com>
Cc: basitstar at hotmail.com; sr-users at lists.sip-router.org
Subject: RE: Re:[SR-Users] Kamailio IMS deployment


> Even we observed in Wireshark traces, no username is included in
> REGISTER request. Any changes required?
> No, we are not using NATURAL in our platform.

The "NATURAL" has been an automatic spell checking of my tablet. It should have been "NAT".

> Observed there is no communication between PCSCF – ICSCF while
> registration and also attaching the tracefile(tcpdump) using command
> “tcpdump -i any -s 3000 -w /var/tmp/trace_OpenIMS.pcap not port 22 and
> not port 3306”.

As you can see in the trace: The P-CSCF forwards the REGISTER request to which is not the I-CSCF (and not prepared to receive such messages).
You should check the forwarding to I-CSCF in kamailio-pcscf.cfg.

Next time you should start with the trace also at startup of the x-CSCF to see that the Diameter connections are up and running.

BR Franz

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