Hi David,
On Wed, Dec 14, 2011 at 10:05:31AM -0800, David A. Burgess wrote:
Does you have an example GSMTAP/PCAP trace of a successful PDP context activation using OmsoSGSN? That would be useful for comparison. (And do you find the GPRS L3 & SNDCP decoding in the current Wireshark 1.7 to be reliable?)
I currently don't think I have any traces ready that I could share with you, but there might be some other people on this list who have.
In any case, if you are already getting beyound the GMM procedures (RA UPDATE / GPRS ATTACH) in bi-directional communication between the MS and the SGSN, then I think your L1 and RLC/MAC are working.
I guess the problem might really be the PDP CONTEXT ACTIVATE then.
I would look in the PCAP files for * issues with using the wrong TLLI, especially during/after P-TMSI reallocation (maybe patch out the code from OsmoSGSN) * sequence numbering issues on the LLC layer sequence numbers
And yes, so far I havent' had much complaints about the GMM/SM/SNDCP/LLC decoding of wireshark.
Regards, Harald