On Fri, May 4, 2012 at 7:39 PM, Harald Welte <[email protected]> wrote: > hi Olaf, > > On Fri, May 04, 2012 at 02:25:28PM +0200, Olaf Schulz wrote: >> I use OpenBSC/GPRS (sw version only few weeks old) with nanoBTS and >> this works well mith many mobile devices. With Nokia devices, >> however, I do not get a PDP context. Here is an osmo-sgsn trace of >> Nokia E65: > > This is very likely a problem related to TLLI state tracking and LLC > sequence numbers. We have seen this for probably something like one > year in OsmoSGSN and sadly nobody has had enough of a problem with it to > actually debug it completely, fix it and contribute back a fix :/ >
Please see my posts from a few days back in which a fix is suggested for the TLLI mismatch. I had similar problems and they were solved after applying that patch. The problem, as far as I found it, is that SGSN is translating the foreign TLLI to a local TLLI (which is fine), but later on rechecks the foreign TLLI for existence (which is not fine, because the local variant exists). In my patch I convert all TLLI to local before doing a check so previously created local TLLI's are matched to the correlated foreign TLLI. Regards, Frank
