Data Networks' Design and Optimization through MPLS VPNs Using BGP

The key strong points of the Internet have been its vast scalability and flexibility to provide accommodation to the variety of applications. In this context, MPLS (Multi Protocol Label Switching) is the newest technology being employed today's in the Internet core, which is continuously growing to meet the increasing demands of bandwidth and connectivity. In this research paper, the authors provide a survey of MPLS, BGP (Border Gateway Protocol) and both layer-2 and layer-3 VPNs (Virtual Private Networks). They address the issues (such as speed, scalability and security) of traditional IP-based VPNs. Since layer-2 VPNs are efficient but not so intelligent and scalable, while layer-3 VPNs are intelligent and scalable but not so efficient.