Hi Radko,
On Mon, Nov 14, 2011 at 06:07:06PM +0100, Radko Krkoš wrote:
Hello, I am trying to set up an OpenBSC based GSM network. The GSM part was easy and relatively quick to do, but I have a problem with GPRS. I have read the documentation for OpenSGSN (http://openbsc.osmocom.org/trac/wiki/) and OpenGGSN (man page). After a couple of days searching for more information and trying whatever came to my mind, GPRS still does not work.
Your setup looks fine in termso of the IP addresses and other configuration that you have shown.
What would be interesting is to actually look at the protocol traces of the Gb(NS/BSSGP) and GTP interfaces.
Based on your SGSN output, there is not even any any GMM activity shown.
Before you ever get any actual GPRS data (PDP context, etc.) up, there needs to be a GMM ATTACH / GMM RA UPDATE / etc. procedure. Those should be visible in the Gb interface protocol traces, and also show up on the sgsn vty if you do
logging enable logging filter all 1 logging level mm debug
Regards, Harald