srsRAN <-- > Aether-In-A-Box (OMEC 4G-Core ) --> Getting Network failure - Code 17 | 19 | 66

[MD-star-cloud33]

I've 2 VM, in 1st VM Aether-in-a=Box 4G Core Running as a CNF & in 2nd VM srsRAN running with eNB & UE with ZMQ. Changed ~/.config/srsran/enb.conf [enb] enb_id = 0x19B mcc = 208 mnc = 01 mme_addr = X.X.X.X (My Node Pvt IP Address where Core component Running ) gtp_bind_addr = X.X.X.X (srsRAN VM own IP) s1c_bind_addr = X.X.X.X (srsRAN VM own IP) s1c_bind_port = 36412 (port for SCTP) n_prb = 50

Changed ~/.config/srsran/ue.conf

[usim] mode = soft algo = milenage opc = d4416644f6154936193433dd20a0ace0 (As per HSS) k = 465b5ce8b199b49faa5f0a2ee238a6bc (As per HSS) imsi = 208010167891201 (As per HSS) imei = 353490069873319

reader =

pin = 1234

[nas] apn = internet apn_protocol = ipv4

Issue Description

Downlink NAS Transport Attach Released.

Setup Details

Taken 2 VM in AWS, each of these vm are reachable from one another & from internet,

Expected Behavior

e2e call should progress

Actual Behaviour

ubuntu@ip-172-31-3-99:~/srsRAN_4G/build$ sudo ./srsenb/src/srsenb /home/ubuntu/.config/srsran/enb.conf --rf.device_name=zmq --ce_args="fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://localhost:2001,id=enb,base_srate=23.04e6" Active RF plugins: libsrsran_rf_zmq.so Inactive RF plugins: --- Software Radio Systems LTE eNodeB ---

Reading configuration file /home/ubuntu/.config/srsran/enb.conf...

Built in Release mode using commit 5a4eb5d6c on branch master.

Opening 1 channels in RF device=zmq with args=fail_on_disconnect=true,tx_port=tcp://:2000,rx_port=tcp://localhost:2001,id=enbrate=23.04e6 Supported RF device list: zmq file CHx base_srate=23.04e6 CHx id=enb Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) CH0 rx_port=tcp://localhost:2001 CH0 tx_port=tcp://:2000 CH0 fail_on_disconnect=true

==== eNodeB started === Type to view trace Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz for cc_idx=0 nof_prb=50 t Enter t to stop trace. RACH: tti=341, cc=0, pci=1, preamble=45, offset=0, temp_crnti=0x46

           -----------------DL----------------|-------------------------UL-------------------------

rat pci rnti cqi ri mcs brate ok nok (%) | pusch pucch phr mcs brate ok nok (%) bsr lte 1 46 15 0 9 6.5k 16 8 33% | 99.9 99.9 30 16 41k 8 0 0% 0.0 lte 1 46 15 0 0 0 0 0 0% | n/a 99.9 0 0 0 0 0 0% 0.0 lte 1 46 15 0 0 0 0 0 0% | n/a 99.9 0 0 0 0 0 0% 0.0 lte 1 46 15 0 0 0 0 0 0% | n/a 99.9 0 0 0 0 0 0% 0.0 lte 1 46 15 0 0 0 0 0 0% | n/a 99.9 0 0 0 0 0 0% 0.0 Disconnecting rnti=0x46.

UE Status ubuntu@ip-172-31-3-99:~/srsRAN_4G/build$ sudo ./srsue/src/srsue /home/ubuntu/.config/srsran/ue.conf --rf.device_name=zmq --rf.args="tx_port=tcp://*:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6" --gw.netns=ue1 Active RF plugins: libsrsran_rf_zmq.so Inactive RF plugins: Reading configuration file /home/ubuntu/.config/srsran/ue.conf...

Built in Release mode using commit 5a4eb5d6c on branch master.

Opening 1 channels in RF device=zmq with args=tx_port=tcp://:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6 Supported RF device list: zmq file CHx base_srate=23.04e6 CHx id=ue Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) CH0 rx_port=tcp://localhost:2000 CH0 tx_port=tcp://:2001 Waiting PHY to initialize ... done! Attaching UE... Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) . Found Cell: Mode=FDD, PCI=1, PRB=50, Ports=1, CP=Normal, CFO=-0.2 KHz Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Found PLMN: Id=20801, TAC=1 Random Access Transmission: seq=45, tti=341, ra-rnti=0x2 RRC Connected Random Access Complete. c-rnti=0x46, ta=0 Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) . Found Cell: Mode=FDD, PCI=1, PRB=50, Ports=1, CP=Normal, CFO=-0.2 KHz Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Found PLMN: Id=20801, TAC=1 Attach failed (attempt 1/5) Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation) . Found Cell: Mode=FDD, PCI=1, PRB=50, Ports=1, CP=Normal, CFO=-0.2 KHz Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation) Found PLMN: Id=20801, TAC=1 Attach failed (attempt 2/5)

MME Log & SPGW-C log also attached.

Getting error -> Cause https://github.com/srsran/srsRAN_4G/issues/16 – MSC temporarily not reachable

This EMM cause is sent to the UE if it requests a combined EPS attach or tracking area updating in a PLMN where the MSC is temporarily not reachable via the EPS part of the network. Cause https://github.com/srsran/srsRAN_4G/issues/17 – Network failure

This EMM cause is sent to the UE if the MME cannot service an UE generated request because of PLMN failures. Cause https://github.com/srsran/srsRAN_4G/pull/66 – Requested APN not supported in current RAT and PLMN combination

This ESM cause is used by the network to indicate that the procedure requested by the UE was rejected as the requeste

Steps to reproduce the problem

[Tell us how to reproduce this issue e.g. RF setup, application config files]

Additional Information

[Any additional information, configuration or data that might be necessary to reproduce the issue]

PCAP-mme-spgwc-log.zip

enb.log.zip ue.log.zip mme-app.txt s1ap-app.txt spgwc.txt aiab-1104.zip

[andrepuschmann]

Thanks for the report. Without studying any of the logs in detail the issue you describe sounds like a config issue or something in the core anyway. Most of the UE to core comms is transparent to the RAN. I would suggest to check your config again - certainly a non-trivial one - and update the issue if you find something RAN specific to be the culprit.

[MD-star-cloud33]

if you could check these logs once in your free time. Have been changing configs in core setup from last 7-8 days, Please help.

[infinitydon]

Also getting the same issue but looks like this is the in security capabilties exchange..

srsRAN is making mandatory (ESM information transfer): Security protected ESM information transfer required but MME is not relaying it back, so srsRAN is rejecting UE security capability

UE Attach request:

MME replayed security capabilities does not include ESM information transfer

Can ESM be made optional?

[infinitydon]

Using latest MME release seems to fix the ESM problem, currently MME is responding with successful IP allocation but srsUE is still showing attach failed..

root@srslte-85cf55cc44-tcq24:/srsRAN/build/srsue/src# ./srsue ue.conf
Active RF plugins: libsrsran_rf_zmq.so
Inactive RF plugins:
Reading configuration file ue.conf...

Built in Release mode using commit 655a098b7 on branch master.

Opening 1 channels in RF device=zmq with args="tx_port=tcp://*:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6"
Supported RF device list: zmq file
CHx base_srate=23.04e6"
CHx id=ue
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
CH0 rx_port=tcp://localhost:2000
CH0 tx_port=tcp://*:2001
Warning: Failed to create thread with real-time priority. Creating it with normal priority: Operation not permitted
Waiting PHY to initialize ... Warning: Failed to create thread with real-time priority. Creating it with normal priority: Operation not permitted
Warning: Failed to create thread with real-time priority. Creating it with normal priority: Operation not permitted
Warning: Failed to create thread with real-time priority. Creating it with normal priority: Operation not permitted
Warning: Failed to create thread with real-time priority. Creating it with normal priority: Operation not permitted
done!
Attaching UE...
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CP=Normal, CFO=-0.2 KHz
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Found PLMN:  Id=20801, TAC=1
Random Access Transmission: seq=22, tti=341, ra-rnti=0x2
RRC Connected
Random Access Complete.     c-rnti=0x46, ta=0
Attach failed (attempt 1/5)

Attached is the full PCAP

srs-onf-attach-may-1-3.zip

[infinitydon]

UE debug logs

ue.zip