Engineering analysis and research of MPLS VPN

In recent years, VPN (Virtual Private Network) technology has become one of the most important services in multinational companies around the world because of its security, convenience, real-time and low construction cost. However in traditional VPN technology including overlay VPN (ATM, Frame-Relay) and Peer-to-Peer VPN (IP-routing), more and more disadvantages have emerged such as complex management and implementation, lack of availability and expansibility, customer address-overlapping, etc. Compared to traditional VPN, MPLS VPN (Multi-Protocol Label Switching VPN) is a real good solution and has its own technology features and functions such as FEC, VRF, MPBGP, VPNv4 address and so on to overcome the disadvantages above. In this paper we analyze and research the features and functions of MPLS VPN as well as the weaknesses of traditional VPN mentioned in detail, later a vivid experiment is given to demonstrate the excellent performance of MPLS VPN.