CloudLinux OS is supported on a variety of virtualization platforms, including KVM, VMware, and others. If you're using an OVHCloud template, it's important to ensure that the template is compatible with the CloudLinux OS.

Regarding the network issue during installation, this could be due to several factors. Here are some steps you can take to troubleshoot:

1. Check Network Configuration: Ensure that you have properly configured the network settings during the installation process. This includes specifying the correct IP address, netmask, gateway, and DNS servers.

2. Verify Hardware and Drivers: Make sure that the network hardware is supported by the CloudLinux OS and that the necessary drivers are available.

3. Firewall Settings: Check if any firewalls are blocking the network traffic. You may need to adjust firewall rules to allow necessary connections.

4. Network Services: Confirm that essential network services like DHCP and DNS are running and configured correctly.

5. Network Cabling and Switches: Physical connections can sometimes be the issue. Check the physical cabling and switches to ensure they are functioning properly.

6. OVHCloud Specifics: OVH may have specific network configurations or requirements. Check OVH's documentation or support resources for any known issues or recommended settings.

7. Contact OVH Support: If you're still facing issues, it's a good idea to reach out to OVH's support team. They should be able to assist you in troubleshooting the network problem.

Keep in mind that software and platform configurations can change over time, so it's recommended to consult the latest documentation and support resources from both CloudLinux and OVHCloud.