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Here is values to deploy Free5GC core + our eUPF at Kubernetes node using helmcharts Orange-OpenSource/towards5gs-helm.

UpLink CLassifier (ULCL) architecture

Here is configuration with three UPFs. Traffic routes is:

  • UE--gNodeB--upfb--upf1--Internet as default
  • UE--gNodeB--upfb--upf2--Internet--1.1.1.1/32 for imsi-208930000000003 specificPath

Our eUPF deployed as upfb. upf1 and upf2 are modules from free5gc.

You can see the difference in the first hop of traceroute from UE:

bash-5.1# traceroute -i uesimtun0 www.google.com -w 1
traceroute to www.google.com (173.194.222.103), 30 hops max, 46 byte packets
 1  10.233.64.41 (10.233.64.41)  1.518 ms  1.805 ms  1.459 ms
 ......
 bash-5.1# traceroute -i uesimtun0 -w1 1.1.1.1
traceroute to 1.1.1.1 (1.1.1.1), 30 hops max, 46 byte packets
 1  10.233.64.56 (10.233.64.56)  1.512 ms  1.176 ms  0.778 ms

Quick start

prepare kubernetes nodes - install gtp5g kernel module

compile and install gtp5g kernel module needed for Free5gc UPFs:

apt-get update; apt-get install git build-essential -y; \
cd /tmp; \
git clone --depth 1 https://github.com/free5gc/gtp5g.git; \
cd gtp5g/; \
make && make install

check that the module is loaded:

lsmod | grep ^gtp5g

  • install helm

  • add towards5gs helm repo

    helm repo add towards5gs 'https://raw.githubusercontent.com/Orange-OpenSource/towards5gs-helm/main/repo/'
helm repo update

Use make commands to deploy in NAMESPACE free5gculcl

📝 Other pods deployed by towards5gs in any namespaces should be stopped to avoid conflict of IP addresses of type ipvlan.

  1. make eupf to install eUPF deploy as upfb

  2. make upf to install Free5gc UPFs deploy as upf1, upf2

  3. make free5gc to install free5gc core

  4. Open web interface and add new subscriber.

    redirect port from webui pod to localhost

    kubectl port-forward service/webui-service 5000:5000 -n free5gc

    open http://127.0.0.1:5000 in your browser (for auth use user "admin" with password "free5gc"), go to menu "subscribers", click "new subscriber", leave all values as is, press "submit"

    close port forward with Ctrl + C

  5. make ueransim to install gNodeB and UE simulators.

after installation, you can run shell into uerasim ue pod:

  • make ueransim_shell

    make clean will delete all components from cluster