Mpls Vpn Mechanisms And Security Strength To Study

In the field of VPN, MPLS VPN is a new kind of VPN implementation. MPLS VPN has combined the advantage of IP and ATM. Because of its efficiency and simplicity, there are more and more business customers adopting MPLS based VPN to build their VPN networks, and there are more and more service providers having constructed their MPLS core networks to provide the customers with MPLS VPN service.But there is a common opinion: traditional layer 2 VPNs based on Frame-Relay or ATM are quite secure, however, MPLS VPN is built on the IP network which is connectless, so people worry about the security MPLS VPN provides. In this paper, we first elaborate the technology of traditional VPNs, MPLS and MPLS based VPN, and then compare the MPLS VPN with traditional VPNs. Based on above discussion, we analyze the security of MPLS VPN from the following three aspects: address space and routing separation, hiding the SP core network, and resistance to attacks. Through the analysis, we draw the conclusion that MPLS VPN is as secure as its layer 2 counterparts such as Frame-Relay or ATM based VPNs. Because MPLS VPN has many kinds of advantage, in future, it will be the main solution to build enterprise VPNs.