VRFs

This section provides a clear introductory overview of Virtual Routing and Forwarding instances, commonly known as VRFs. VRFs are a core component of MPLS Layer 3 VPN design because they allow service providers to separate customer routing information within the same physical network infrastructure. Throughout this section, learners will understand how VRFs create independent routing tables for different customers or services. This separation ensures that each customer’s overlay network remains logically isolated, even though multiple customers may be using the same provider backbone. The section also explains why VRFs are essential for maintaining traffic separation, route privacy, and scalable VPN service delivery in MPLS Layer 3 VPN environments. By understanding VRFs, learners build the foundation needed to work with customer route exchange, PE-CE routing, and MPLS VPN forwarding behavior. By the end of this section, learners will have a stronger understanding of how VRFs support customer network separation and why they are a fundamental building block of MPLS Layer 3 VPN services.