[srslte-users] Trouble connecting commersial UE (and some basic questions..)

[Gunnar Kulbotten]

Thanks!
Here is the epc.pcap file.

tor. 23. apr. 2020 kl. 17:18 skrev Pedro Alvarez <
pedro.alvarez at softwareradiosystems.com>:

> Can you share the epc.pcap please?
> It might still be an APN issue, it would be nice to see the actual
> messages going around.
>
> On Thu, Apr 23, 2020 at 12:31 PM Gunnar Kulbotten <gkulbotten at gmail.com>
> wrote:
> >
> > I got a small step closer to get this working today! One problem is that
> my Quectel LTE modem won`t register to the srsLTE network. It is connected
> to a windows-pc. The modem gets ip 172.16.0.2 from the srsLTE-network. I
> put this address as gateway in the windows-pc network properties, and
> 17.16.0.10 as ip-address. This actually worked for little while, and I
> could ping the enodeb/epc-pc from the windows-pc! Then the status in
> windows chenged to "Disconnected", and the connection was lost. It
> reappeared for a short while, and was lost again.
> >
> > I got a new error message from the srsepc terminal window:
> >
> > UL NAS: Received Attach Complete
> > Unpacked Attached Complete Message. IMSI 1012345678912
> > Unpacked Activate Default EPS Bearer message. EPS Bearer id 5
> > Received GTP-C PDU. Message type: GTPC_MSG_TYPE_MODIFY_BEARER_REQUEST
> > Sending EMM Information
> > Unhandled NAS integrity protected message
> LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
> > Unhandled NAS integrity protected message
> LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
> > Unhandled NAS integrity protected message
> LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
> > And a lot more of these...
> >
> > I found this information from  the thread "NAS integrity error": "
> >
> > Seems like the UE is initially requesting the "oai.ipv4" APN. You can
> > see this in the ESM information response message in the PCAP. Only
> > after the attach is complete it requests the PDN connectivity to the
> > "srsapn" PDN."
> >
> > I thought maybe my problem was the same, but I can`t find any ESM
> information response message
> > in  my epc.pcap-file?
> >
> > From the beginning of epc.log:
> >
> > Built in Release mode using commit d045213f on branch master.
> >
> > ---  Software Radio Systems EPC log ---
> >
> > 10:18:59.364245 [HSS ] [I] Opened DB file: /etc/srslte/user_db.csv
> > 10:18:59.364388 [HSS ] [I] HSS Initialized. DB file
> /etc/srslte/user_db.csv, MCC: 61441, MNC: 65281
> > 10:18:59.390979 [S1AP] [I] S1-MME Initializing
> > 10:18:59.391230 [S1AP] [I] S1AP Initialized
> > 10:18:59.391250 [MME GTPC] [I] Initializing MME S11 interface.
> > 10:18:59.391272 [MME GTPC] [I] MME S11 Initialized
> > 10:18:59.391302 [MME GTPC] [I] MME GTP-C Initialized
> > 10:18:59.391313 [S1AP] [I] MME Initialized. MCC: 0xf001, MNC: 0xff01
> >
> > Is the MCC and MNC correct? Elsewhere they are 001 and 01?
> >
> > _______________________________________________
> > srslte-users mailing list
> > srslte-users at lists.softwareradiosystems.com
> > http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>
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