RE: Problem with SGSN Location Update Reject during UE attach

Hello Mr. Neels Hofmeyr Vielen Dank fuer die schnelle Antwort :-) Actually we also have seen the "Congestion" in the log but we have not understood why We have modified the SGSN configuration: set auth-policy to accept-all. We repeat the UE attach with this configuration but still MSC sends "Location Update Reject" I attach the new pcap file, msc log and sgsn log. I very appreciate if you can take a look to that. Vielen Dank Tuan Lam -----Original Message----- From: Neels Hofmeyr [mailto:nhofmeyr@sysmocom.de] Sent: Tuesday, October 16, 2018 5:43 PM To: Lam Ngoc Tuan Cc: osmocom-net-gprs(a)lists.osmocom.org Subject: Re: Problem with SGSN Location Update Reject during UE attach Actually, the GMM attach doesn't complete, either. The messages look a bit confusing, with a bunch of Location Updating Accept followed by a final Location Updating Reject due to "Congestion". The causes may be - two simultaneous MM attach requests from the same subscriber, - timeout after attaching, e.g. phone sends no TMSI Reallocation Complete It's hard for me to see what is going on there, take a look at the MSC's logs. As soon as the MSC attach works out, the phone will continue to try at the SGSN. ~N