Problem in bringing up the gNB and UE using 5G OAI profile

[Rajpreet Singh Grewal]

Hi-

I was trying to run the OAI 5G system profile to bring up the gNB and the UE.

I was trying to use the helper script to run the commands.

I get the error as "command not found".  But when I looked into the directory the "nr-softmodem" and "nr-uesoftmodem" files are already there.

I am not why I am not able to bring with gNB and UE when everything is there.

[Dustin Maas]

Hi Rajpreet,

Looks like you made a typo when you cloned the repo. Look closely at the path to OAI in your experiment vs. what the helper script is trying to call (opeairinterface5g is the directory you’re looking at in the screenshot).

Also, it’s best to include a link to your experiment with queries like these. It helps us debug :)

Best,
Dustin

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[Rajpreet Singh Grewal]

Hi Dustin-

Sorry, I am not clear about your comment. Even I run in the root directory. It's still the same emssage.

Also here is the link to the experiment, I was trying: https://gitlab.flux.utah.edu/powderrenewpublic/oai_fall_2021_workshop/-/blob/main/Lab-1-RAN.md

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[ALEX JAMES W ORANGE]

Rajpreet,

     I would suggest you go to the directory where nr-softmodem is, type pwd, put the output in a diff tool along with the bit after the sudo RFSIMULATOR=... and look at the difference between them.

Alex

---

From: powder...@googlegroups.com <powder...@googlegroups.com> on behalf of Rajpreet Singh Grewal <Rajpree...@colorado.edu>
Sent: Wednesday, February 2, 2022 6:05 PM
To: powder...@googlegroups.com <powder...@googlegroups.com>
Subject: Re: Problem in bringing up the gNB and UE using 5G OAI profile

 

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[Rajpreet Singh Grewal]

Thanks, Alex I found the error and was able to bring up the complete 5G OAI testbed and was able to run the traffic from the UE to the network.

One question: How I can save all the traffic data samples or other configurations on the local drive. I found that SSH can be set up for this. But I am not sure about the IP address to ssh the data. Also, how can I access the 5G core configuration files to find the IP address of each network function (AMF, SMF, UPF, etc.) in the 5G core? Here I am running the generating the traffic with the IP address provided in the profile at the below link.

https://gitlab.flux.utah.edu/powderrenewpublic/oai_fall_2021_workshop/-/blob/main/Lab-1-RAN.md

To view this discussion on the web visit https://groups.google.com/d/msgid/powder-users/CO1PR11MB4836E5928098E5BCA50C6C4986289%40CO1PR11MB4836.namprd11.prod.outlook.com.

[Dustin Maas]

Rajpreet,

If you add the public ssh key for the computer you are using to your POWDER account, you’ll be able to access the nodes in your experiments directly with ssh, and also retrieve log/config files with tools like scp or rsync. You can find the IP address(es) of the node(s) in your experiment, as well as the ssh commands to access them, in the List View tab for the experiment in the POWDER web portal. You can also setup X11 forwarding if you want to run the 5G RAN elements with the GUI parts enabled via SSH. Have a look at sections 5.1.3 and 5.1.4 of the manual for information about how to set these things up: https://docs.powderwireless.net/users.html#%28part._ssh-access%29. Note that it will take around 15 minutes for the public ssh key you add to sync to the nodes in your running experiments.

You can append | tee nr-softmodem.log to the command that starts the nr-softmodem to capture that log to a file while still displaying the output in the terminal (similar for nr-uesoftmodem). The 5G core network functions are running in Docker containers, so you can watch and capture their logs using, sudo docker logs -f oai-{networkfunction} | tee {networkfunction}.log, replacing {networkfunction} with whichever function you want. E.g., sudo docker logs -f oai-amf | tee oai-amf.log.

Most of the relevant configuration for the 5G core services, as well as their IP addresses on the Docker bridge network are set by the docker-compose file located at /opt/oai-cn5g-fed/docker-compose/docker-compose-mini-nrf.yaml.

-Dustin

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