Hi, I am reading the OpenBSC_GPRS wiki page and trying to get GPRS up and running. On the wiki it says:
! ! Osmocom SGSN configuration ! ! line vty no login ! sgsn gtp local-ip 192.168.1.128 ggsn 0 remote-ip 192.168.1.129 ggsn 0 gtp-version 1 ! ns timer tns-block 3 timer tns-block-retries 3 timer tns-reset 3 timer tns-reset-retries 3 timer tns-test 30 timer tns-alive 3 timer tns-alive-retries 10 encapsulation udp local-ip 192.168.0.128 encapsulation udp local-port 23000 encapsulation framerelay-gre enabled 0 ! bssgp !
Shouldn't encapsulation udp local-ip and gtp local-ip be the same if everything is on the same subnet?
Also I have all 3 processes running openggsn, osmo-sgsn and bsc_hack but GPRS does not attach on any of my handsets. What could be the problem?
On 11/15/2010 08:44 PM, Stuart Baggs wrote:
Shouldn't encapsulation udp local-ip and gtp local-ip be the same if everything is on the same subnet?
I can't comment on this.
Also I have all 3 processes running openggsn, osmo-sgsn and bsc_hack but GPRS does not attach on any of my handsets. What could be the problem?
Please use wireshark as their can be many issues. Do you see NS messages coming from the BTS to the osmo-sgsn (udp port 23000 or such)?
On Mon, Nov 15, 2010 at 07:44:50PM +0000, Stuart Baggs wrote:
Hi, I am reading the OpenBSC_GPRS wiki page and trying to get GPRS up and running. On the wiki it says: [...]
this is correct, assuming that your IP interface facing the nanoBTS is running on 192.168.0.128 and the IP ineterface facing from the SGSN to the GGSN is on 192.168.1.128
Also I have all 3 processes running openggsn, osmo-sgsn and bsc_hack but GPRS does not attach on any of my handsets. What could be the problem?
Just like debugging general IP networkin issues using stuff like tcpdump or wireshark. Then you should see connection attempts on the various interfaces, such as from the nanoBTS to the SGSN, etc.
Regards, Harald
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Harald Welte -
Holger Hans Peter Freyther -
Stuart Baggs