IP Routing Configuration

Prerequisites

IP routing configuration and testing requires iperf3. Please install it beforehand:

Ubuntu/Debian:

sudo apt install iperf3

Fedora/CentOS/RHEL:

sudo dnf install iperf3

gNB Machine Setup

  1. Add downlink route to UE network:

    sudo ip route add 10.45.0.0/16 via 10.53.1.2
ping 10.45.1.2  # Verify downlink connection

Important

For single-machine ZMQ setups, prepend all UE network commands with ip netns exec ue1.

UE Container Configuration

  1. First, get the container ID and access the container bash:

    sudo docker ps
sudo docker exec -it <container_id> bash

  2. Inside the container, identify TUN interface IP:

    ip a show tun_rtue | grep 'inet'

  3. Establish uplink routing:

    ip route add 10.53.0.0/16 via <tun_rtue_ip> dev tun_rtue
ping 10.53.1.1  # Validate uplink connection

iPerf3 Performance Testing

  1. Server side (gNB):

    iperf3 -s -i 1 -p <port_number>

  2. Client side (UE Container):

    # TCP
iperf3 -c 10.53.1.1 -i 1 -t 60 -p <port_number>
# UDP
iperf3 -c 10.53.1.1 -i 1 -t 60 -u -b 10M -p <port_number>