How to Configure IPv4 and IPv6 Static IP with Netplan on Ubuntu

Proper network configuration is crucial for stable and secure server operations. In this guide, we will walk you through the process of configuring both IPv4 and IPv6 static IP addresses using Netplan on Ubuntu. We will also show you how to identify your network interfaces before applying configurations.

Step 1: Find Network Interface Names

Before configuring static IPs, you must determine the name of your network interfaces. Use the following command:

ip link show

Alternatively, you can use:

ls /sys/class/net/

Common interface names include eth0, ens160 or enp0s3. Note the correct interface name for configuration.

Step 2: Configure Netplan with Static IP Addresses

Netplan configurations are stored in the /etc/netplan/ directory. Open or create a YAML file in that directory, such as 01-netcfg.yaml.

sudo nano /etc/netplan/01-netcfg.yaml

Below is a generic example to configure both IPv4 and IPv6 static IP addresses:

network:
  version: 2
  ethernets:
    eth0:
      dhcp4: false
      dhcp6: false
      addresses:
        - 192.168.1.100/24
        - 2001:db8::1/64
      routes:
        - to: default
          via: 192.168.1.1
        - to: "::/0"
          via: "2001:db8::1"
          on-link: true
      nameservers:
        addresses:
          - 8.8.8.8
          - 8.8.4.4
          - 2001:4860:4860::8888
          - 2001:4860:4860::8844

Replace eth0 with your actual network interface name. Update IP addresses, gateway routes, and nameservers based on your network environment.

Step 3: Apply the Netplan Configuration

After saving the configuration file, apply the settings with the following command:

sudo netplan apply

If you want to verify the configuration before applying, use:

sudo netplan try

Step 4: Verify Network Configuration

Run the following commands to confirm that your static IP addresses are active:

ip addr show
ip route show

Final Notes

Using Netplan simplifies the management of complex network configurations. Whether you are configuring a cloud server, a dedicated server, or a local workstation, static IP addressing ensures stability and easier remote management.

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