Re: 回复： osmo-pcu always "T3193 timeout expired, freeing TBF" when osmo-sgsn send GPRS ATTACH ACCEPT

Hi,

I would say the RLCMAC side looks fine. It looks like the SGSN is rejecting the ATTACH REQUEST. You may have a misconfiguration in the encryption config of osmo-sgsn?

Unfortuantely, your pcap doesn't contain the contents of the Gb interface ("gprs-ns" filter in wireshark), so it's difficult to say what's going on.

Please share a pcap containing gprs-ns (PCU<->SGSN) and gtp (SGSN<->GGSN) packets in order to find out what's going on. Share also a log file of osmo-sgsn (or use gsmtap log) with debug enabled to find out why is the SGSN rejecting it.

Regards, Pau