Chapter 1. Overview of Network Functions Virtualization

Network Functions Virtualization (NFV) is a software solution that virtualizes a network function on general purpose, cloud based infrastructure. With NFV, the Communication Service Provider is able to move away from traditional hardware.

For a high level overview of NFV concepts, see the Network Functions Virtualization Product Guide.


OVS-DPDK and SR-IOV configuration depends on your hardware and topology. This guide provides examples for CPU assignments, memory allocation, and NIC configurations that might vary from your topology and use case.

Use Red Hat OpenStack Platform director to separate specific overcloud network types, for example, external, tenant, and internal API networks, into isolated networks. You can deploy a network on a single network interface or distributed over a multiple host network interface. Create bonds by assigning multiple interfaces to a single bridge with Open vSwitch. Use template configuration files to configure network isolation. Without template configuration files, all the service networks in your Red Hat OpenStack Platform installation are deployed on the provisioning network. There are multiple types of template configuration files:

This file contains network details, subnets, and IP address ranges for the overcloud nodes. This file also contains settings that override the default parameter values for various scenarios.
compute.yaml and controller.yaml
These files contain the host network interface configuration for the overcloud nodes.
This file replaces the deprecated first-boot.yaml file, and contains configuration for host installation.

These heat template files are located at /usr/share/openstack-tripleo-heat-templates/ on the undercloud node.

The Hardware requirements and Software requirements sections provide more details on how to plan and configure the heat template files for NFV using the Red Hat OpenStack Platform director.


You use YAML files to outline NFV configuration. For more information about the YAML file format, see YAML in a Nutshell