241 / 2017-01-16 00:05:28

MPLS VPN Over mGRE Design and Implementation for A Service Provider's Network using GNS3 Simulator

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MPLS VPN over mGRE leverages the flexibility that point-to-point MPLS VPN over IP solutions offers, while simplifying management, configuration, control plane protocols, and overall network operations of any MPLS VPN solution over IP. Because mGRE is a point-to-multipoint model, fully meshed GRE tunnels are not required to interconnect MPLS VPN PE devices. Thus, MPLS VPN over mGRE solves the cumbersome configuration issue that exist when attempting to configure 100's of sites, requiring a full-mesh of connectivity and cumbersome, and eliminating the time-consuming process of configuring and maintaining point-to-point GRE tunnels, and the IGP and LDP needed to run over them. In this paper, we have implemented the idea over a service provider’s core network using Graphical Network Simulator (GNS3). When the MPLS VPN over mGRE features is enabled, it allows the operator to deploy a "self-deployed" MPLS VPN service on the CE/CPE router connected via the SP service offering. This allows one to provision the L3 VPN services without using Label-Switched Path (LSP), Carrier Supporting Carrier (CsC), or a Label Distribution Protocol (LDP). MPLS VPN over mGRE uses IPv4-based mGRE tunnels to encapsulate VPNv4/v6 labeled packets between CE devices, over the IP transport. The resultant network obtained after this design is a real time solution to many problems and demands in today's service provider's network.