Simplestack
Compute

IPv6 Configuration

Manually setting up your IPv6 configuration.

Your virtual machine supports both IPv4 and IPv6 connectivity. If you have initially set up your virtual machine it works automatically, however, certain changes require a manual configuration. For example, when IPv6 is enabled or a private network has been attached after the virtual machine was already created.

Choose your Linux version

Edit your network configuration

Terminal
vim /etc/netplan/50-cloud-init.yaml

Add the IPv6 address and a route to your gateway

You can find your assigned IPv6 address and gateway under the "Network" tab of your virtual machine. Below you can see an example configuration:

/etc/netplan/50-cloud-init.yaml
network:
  version: 2
    ethernets:
      eth0:
        match:
          macaddress: "bc:24:11:a6:33:1b"
        addresses:
        - "37.139.142.89/28"
        - "2a00:a7c0:1357:3::1/64"
        nameservers:
          addresses:
          - 37.139.139.39
          - 37.139.139.139
          - 2a00:a7c0:1000:1::39
        set-name: "eth0"
        routes:
        - to: "default"
          via: "37.139.142.81"
        - on-link: true
          to: "default"
          via: "fe80::200:5eff:fe00:2c8"

Apply the configuration

Terminal
sudo netplan apply

(Advanced option) Force a re-run of cloud-init

Making cloud-init run again may be destructive and must never be done on a production system. Artifacts such as ssh keys or passwords may be overwritten.

When cloud init runs again it will set the correct default network values and therefore your IPv4 and IPv6 connectivity should be working out of the box. You do need to reboot your virtual machine for changes to take into effect.

Introduction

Spin up VMs in seconds with enterprise-grade performance. Free support, cancel anytime, and data hosted exclusively in European-owned datacenters.

Private Network Configuration

Manually setting up your private network configuration.

© 2026 Simplestack – All Rights Reserved.