GPRS and PDP Context

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David Perez david at taddong.com
Thu Sep 20 16:09:43 UTC 2012


Hi,

In order to get more information, you may telnet into osmo-sgsn on port
4245 (telnet localhost 4245), and type:
---
logging enable
logging filter all 1
logging level mm debug
---

HTH.

----
David Perez
Founder & Senior Security Analyst
Taddong
david at taddong.com | +34-699982432 | www.taddong.com
----
20sep12 1808

On 20-Sep-12 18:00, ☎ wrote:
> 19.09.2012 17:48, Peter Stuge пишет:
>> ☎ wrote:
>>> I have similar setup although in my case it doesn't work at all.
>> ..
>>> /etc/osmo_sgsn.cfg:
>> ..
>>> ns
>> ..
>>>  encapsulation udp local-ip 192.168.10.53
>>>  encapsulation udp local-port 23000
>>
>>> /etc/openbsc.cfg:
>> ..
>>>  bts 0
>> ..
>>>   gprs nsvc 0 local udp port 23000
>>>   gprs nsvc 0 remote udp port 23000
>>>   gprs nsvc 0 remote ip 192.168.10.53
>>
>> I don't think both processes can use the same port; move one of them
>> and configure the other accordingly.
> 
> Thanks for suggestion.
> 
> Now it looks like this:
> 
>  /etc/osmo_sgsn.cfg:
> ...
> encapsulation udp local-ip 192.168.10.53
> encapsulation udp local-port 23333
> ...
> 
> /etc/openbsc.cfg:
> ...
> gprs nsvc 0 local udp port 23000
> gprs nsvc 0 remote udp port 23333
> gprs nsvc 0 remote ip 192.168.10.53
> ...
> 
> Still no luck :(
> 
> How to obtain as much debug information as possible?
> 
> ggsn -d
> osmo-sgsn -d GPRS (this causes core-dump unless executed in gdb :)
> osmo-nitb -a -d GPRS
> 
> The only output I got in this configuration is:
> 
> Starting program: /usr/bin/osmo-sgsn
> <0011> gprs_ns.c:171 NSVCI=65534 Creating NS-VC
> <0011> gprs_ns.c:171 NSVCI=65535 Creating NS-VC
> <0011> gprs_ns.c:806 Creating NS-VC for BSS at 192.168.10.55:23000
> <0011> gprs_ns.c:679 NSEI=65535 Rx NS RESET (NSVCI=0, cause=O&M intervention)
> <0011> gprs_ns.c:538 NSEI=101 Tx NS RESET ACK (NSVCI=101)
> <0011> gprs_ns.c:865 NSEI=101 Rx NS UNBLOCK
> <0012> gprs_bssgp.c:249 BSSGP BVCI=0 Rx RESET cause=Transmission capacity modified
> <0012> gprs_bssgp.c:344 BSSGP BVCI=2 Rx BVC-UNBLOCK
> <0012> gprs_bssgp_util.c:103 BSSGP BVCI=2 Tx STATUS, cause=Unknown BVCI
> <0012> gprs_bssgp.c:249 BSSGP BVCI=2 Rx RESET cause=O&M intervention
> <0012> gprs_bssgp.c:272 Cell 1-1-1-0 CI 0 on BVCI 2
> <0012> gprs_bssgp.c:344 BSSGP BVCI=2 Rx BVC-UNBLOCK
> <0012> gprs_bssgp.c:747 BSSGP BVCI=2 Rx Flow Control BVC
> 
> I don't even understand if phone requested ip address?
> Was ip address assigned?
> Is ggsn-sgsn-nitb connectivity ok?
> 
> It's good that howto briefly describes setup, but what do to when it's not working
> out of the box?
> 
> Any troubleshooting tips?
> Anyone with working gprs setup willing to share configuration files as a point of
> reference?
> 




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