TUN interface is not created

[SharadaJay]

Hi,

I'm currently working on helm installation of free5gc and I'm using towards5gs-helm. I can make all the pods running but unfortunately the TUN interface is not created for me. I tried to troubleshoot it but haven't found a solution yet . I have attached the screenshots of ue, gNB, AMF, SMF and UPF logs for your kind reference.

Best Regards, Sharada.

[konradkar2]

Looks like you have some connectivity issue between gNB and AMF on IP/SCTP layer. Can you check whether you can ping between those two?

[raoufkh]

@konradkar2 is right. The gNB cannot connect to the AMF. Are you waiting for the AMF Pod to be up before installing UERANSIM?

[SharadaJay]

Hi @konradkar2 @raoufkh,

Thank you for the reply.

@raoufkh yes I installed UERANSIM after the AMF pod is up and running. I can ping to 10.100.50.249 from the gNB pod but cannot telnet to the 38412 port. The amf pod is only listening on port 80 and does not listen on port 38412. Also I noticed that a service is not created for SCTP.

Service List

AMF pod

gNB pod

[raoufkh]

AMF logs show that AMF is listening on 10.100.50.249:38412. Can you show the network interfaces that are created in the gNB pod?

[oanabutaru98]

Hello! I am having a similar issue when trying to deploy the helms. The TUN interface is not created on the UE, however, I have the following error in the AMF logs.

2023-02-17T10:38:00Z [INFO][AMF][Init] Server started 2023-02-17T10:38:00Z [INFO][AMF][Util] amfconfig Info: Version[1.0.3] Description[AMF initial local configuration] 2023-02-17T10:38:00Z [INFO][AMF][NGAP] Listen on 10.100.50.249:38412 2023-02-17T10:39:34Z [INFO][AMF][NGAP] [AMF] SCTP Accept from: 10.100.50.250:41800 2023-02-17T10:39:34Z [INFO][AMF][NGAP] Create a new NG connection for: 10.100.50.250:41800 2023-02-17T10:39:34Z [INFO][AMF][NGAP][10.100.50.250:41800] Handle NG Setup request 2023-02-17T10:39:34Z [INFO][AMF][NGAP][10.100.50.250:41800] Send NG-Setup response 2023-02-17T10:39:44Z [INFO][AMF][NGAP][10.100.50.250:41800] Handle Initial UE Message 2023-02-17T10:39:44Z [INFO][LIB][FSM] Handle event[Gmm Message], transition from [Deregistered] to [Deregistered] 2023-02-17T10:39:44Z [INFO][AMF][GMM][AMF_UE_NGAP_ID:1] Handle Registration Request 2023-02-17T10:39:44Z [INFO][LIB][FSM] Handle event[Start Authentication], transition from [Deregistered] to [Authentication] 2023-02-17T10:39:44Z [INFO][AMF][GMM][AMF_UE_NGAP_ID:1] Authentication procedure 2023-02-17T10:39:44Z [ERRO][AMF][GMM][AMF_UE_NGAP_ID:1] Nausf_UEAU Authenticate Request Failed: &{Type: Title: Status:500 Detail: Instance: Cause:AV_GENERATION_PROBLEM InvalidParams:[]}

I would appreciate some advice, thank you!

[arielgoes]

I got the same problem. A workaround would be to access the free5gc web interface

Then, manually create a New Subscriber - i.e., button on the right, with default options.

At this moment, if you check your ueransim-ue pod, there must be a new interface (i.e., uesimtun0)

Steps:

1. kubectl get svc -n free5gc webui-service NodePort 10.99.35.12 5000:30500/TCP 16h (this is the exposed service port)

The port 30500 is already publicly exposed by NodePort

You only need to access it either by host-IP:30500 or VM-IP:30500

Note: the free5GC Web Console credentials are: user: admin pwd: free5gc

[oanabutaru98]

you are right, this seems to solve the problem for me as well

[lgabhishek18]

Hi, I am also facing the same issue. My all pods running but unfortunately the TUN interface is not created.

Just to summarize, I have created a Kubernetes cluster (with 2 nodes) using kubeadm to deploy free5gc and ueransim. Detailed info: Ubuntu: 20.04.6 LTS Kernel version: 5.4.0-152-generic Container Runtime version: containerd://1.6.12 K8s Version: v1.20.1 Free5gc: v3.3.0 Ueransim: v3.2.6

(Note: I have deployed ueransim after my all pods of free5gc are running and I have manually created a New Subscriber from web interface also)

Ueransim logs: Network Interfaces availabe in gNB: Network Interfaces availabe in ue:

AMF logs:

If any other logs are required please do let me know.

I'm looking forward to receive some suggestion on this, Thanks!!

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity.

[github-actions[bot]]

This issue was closed because it has been inactive for 14 days since being marked as stale.

[ssdumbre]

I am also facing similar issue , please help here

[ssdumbre]

I have tried the suggested workaround but it did not work for me. I need support here. Thanks in advance!

[gondormartin]

I faced the same problem. Hope these to be useful: I found this when I am trying to install uneransim's chart: So,I uninstalled the uneransim, then I created a subcriber in UI as @arielgoes mention above. After this, I installed uneransim's chart again, then pods ue and gnb started. Now a UE is registerd, we can see it in free5gc's web UI page: Then I enter the pod and finally see the TUN