Hi @aligungr @acetcom
Environment
UERANSIM v3.2.7
Open5GS v2.7.6
Topology and config:
VM1: Core (AMF/SMF/NRF/UDM/PCF) – 10.10.33.54
VM3: UPF in Kubernetes – 10.10.33.60
VM4: UE/gNB – 10.10.33.40
Full.txt
Steps to reproduce
Start gNB with my-gnb.yaml pointing to AMF at 10.10.33.54:38412, slice sst=1 sd=000001.
Start UE with my-ue.yaml (IMSI=999700000000001, DNN=internet).
UE performs initial registration.
UE sends PDU Session Establishment Request.
Expected behavior UE should receive PDU Session Accept and obtain an IP address from the UPF subnet (10.45.0.0/16).
Actual behavior
UE logs show repeated errors:
[nas] [error] SM forwarding failure for message type[193] with cause[PAYLOAD_NOT_FORWARDED]
[nas] [error] Initial Registration failed [?]
[nas] [error] MM Cause with invalid SM message type in DL NAS Transport, ignoring received message
[nas] [error] Initial Registration failed [PAYLOAD_NOT_FORWARDED]
AMF logs: create_sm_context failed [504], gNB-N2 connection refused.
SMF logs: Cannot receive SBI message, SBI transaction has already been removed.
Pcap traces show PFCP association and heartbeats between SMF and UPF are OK, but NGAP SCTP connection with gNB is shut down during the PDU session procedure.
Additional info
Attached logs and pcap files for reference
pcap.txt
The issue seems to be that UE registration completes, but PDU session establishment fails due to AMF–SMF SBI transaction errors and NGAP shutdown.
Thank for your help.
Hi @aligungr @acetcom
Environment
UERANSIM v3.2.7
Open5GS v2.7.6
Topology and config:
VM1: Core (AMF/SMF/NRF/UDM/PCF) – 10.10.33.54
VM3: UPF in Kubernetes – 10.10.33.60
VM4: UE/gNB – 10.10.33.40
Full.txt
Steps to reproduce
Start gNB with my-gnb.yaml pointing to AMF at 10.10.33.54:38412, slice sst=1 sd=000001.
Start UE with my-ue.yaml (IMSI=999700000000001, DNN=internet).
UE performs initial registration.
UE sends PDU Session Establishment Request.
Expected behavior UE should receive PDU Session Accept and obtain an IP address from the UPF subnet (10.45.0.0/16).
Actual behavior
UE logs show repeated errors:
[nas] [error] SM forwarding failure for message type[193] with cause[PAYLOAD_NOT_FORWARDED]
[nas] [error] Initial Registration failed [?]
[nas] [error] MM Cause with invalid SM message type in DL NAS Transport, ignoring received message
[nas] [error] Initial Registration failed [PAYLOAD_NOT_FORWARDED]
AMF logs: create_sm_context failed [504], gNB-N2 connection refused.
SMF logs: Cannot receive SBI message, SBI transaction has already been removed.
Pcap traces show PFCP association and heartbeats between SMF and UPF are OK, but NGAP SCTP connection with gNB is shut down during the PDU session procedure.
Additional info
Attached logs and pcap files for reference
pcap.txt
The issue seems to be that UE registration completes, but PDU session establishment fails due to AMF–SMF SBI transaction errors and NGAP shutdown.
Thank for your help.