Learn how to configure a failover IP in OVHCloud. Our OVH Support team is here to help you with your questions and concerns.
Configure a failover IP in OVHCloud | Guide
Did you know that the failover IPs offered by OVHCloud lets the user associate multiple IP addresses with a single network interface?
3In fact, our experts recommend configuring failover IP addresses on their instances, like international services or hosting multiple websites.
Configure a failover IP in OVHCloud with a Debian 10 instance
Let’s take a quick look at how to configure a failover IP in OVHCloud with a Debian 10 instance:
- To begin with, we have to disable automatic network configuration. So, open this file path:
sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
Copy Code - Then, enter this line in the file:
network: {config: disabled}
Copy Code - Save the file and exit.
- Now, moving on to editing the Network Configuration File. So, verify the network interface name with this command:
ip a
Copy Code - Then, open the network configuration file (/etc/network/interfaces.d/50-cloud-init) and add these lines:
auto NETWORK_INTERFACE:ID iface NETWORK_INTERFACE:ID inet static address IP_FAILOVER netmask 255.255.255.255
Copy Code - Now, it is time to restart the networking interface to apply the changes:
sudo systemctl restart networking
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Configure a failover IP in OVHCloud with Ubuntu 20.04 instance
Let’s take a look at how to configure a failover IP in OVHCloud with Ubuntu 20.04 instance:
- To begin with, we have to disable automatic network configuration. So, open this file path:
sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
Copy Code - Then, enter this line in the file:
network: {config: disabled}
Copy Code - Save the file and exit.
- Now, moving on to editing the Network Configuration File. So, verify the network interface name with this command:
ip a
Copy Code - Then, open the network configuration file (/etc/netplan/cloud-init.yaml) and add the failover IP address as seen in this example:
version: 2 ethernets: NETWORK_INTERFACE: dhcp4: true match: macaddress: fa:xx:xx:xx:xx:63 set-name: NETWORK_INTERFACE addresses: - IP_FAILOVER/32
Copy CodeOur experts would like to point out that the alignment of each element in this file is crucial.
- Now, test the configuration with this command:
sudo netplan try
Copy Code
If everything works as expected, we can apply the following changes:
sudo netplan apply
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Furthermore, we have to repeat this procedure for each failover IP address.
Setting up a new Failover IP on a dedicated server with Centos 8
- First, identify the interface name with the ifconfig command.
- Then, copy the original interface to a new interface with the cp command.
- Now, modify the network interface values as seen here:
DEVICE="enp3s0f0:1" BOOTPROTO=static IPADDR="xxx.xxx.xxx.xxx" NETMASK="255.255.255.255" BROADCAST="xxx.xxx.xxx.xxx" ONBOOT=YES
Copy CodePlease note that IPADDR and BROADCAST have the same IP.
- Finally, reboot so that the new network configuration will take effect.
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Conclusion
In brief, our Support Experts demonstrated how to configure a failover IP in OVH.
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