Last updated 2018/09/25
Objective
IP aliasing is a special network configuration for your OVHcloud servers, which allows you to associate multiple IP addresses with a single network interface.
This guide explains how to add failover IPs to your VPS configuration.
Requirements
- a Virtual Private Server
- a failover IP address or a failover IP block (RIPE)
- administrative (root) access to the server via SSH
Instructions
Debian 9
Step 1: Disable automatic network configuration
First, open the following file, as shown below:
# nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
Next, edit the file with the configuration shown below. This will prevent changes from being made to your network configuration automatically.
network: {config: disabled}
Step 2: Edit the network configuration file
Next, open the network configuration file for editing with the following command:
# nano /etc/network/interfaces.d/50-cloud-init.cfg
Then edit the file with the following configuration:
Note that then names of the network interfaces in our example may differ from your own. Please substitute your own interfaces.
auto ens3
iface ens3 inet dhcp
auto ens3:0
iface ens3:0 inet static
address FailoverIP 0
netmask 255.255.255.255
auto ens3:1
iface ens3:1 inet static
address FailoverIP 1
netmask 255.255.255.255
Ubuntu 18.04
Each failover IP address will need its own line within this file. The configuration file for your failover IP addresses should be called 50-cloud-init.yaml.
Step 1: Create the configuration file
Connect to your server via SSH and run the following command:
# nano /etc/netplan/50-cloud-init.yaml
Next, edit the file with the content below:
network:
version: 2
ethernets:
your_network_interface:
dhcp4: true
match:
macaddress: fa:xx:xx:xx:xx:63
set-name: your_network_interface
addresses:
- your_failover_ip/32
Finally, save and close the file.
Repeat this procedure for each failover IP address.
Go further
Join our community of users on https://community.ovh.com/en/.