Research And Software Implemention Of Layer2 VPN Based On MPLS

A VPN is a network composed of hosts and system in different locations. In the past, the most common way to connect these sites was to use an ATM or Frame Relay leased line, supplied by a service provider. These were traditionally straight forward to provide, as service provider networks were often implemented using a variety of protocols including ATM and Frame Relay. Recently, service providers have been looking at alternative technologies for creating VPN solutions. For supporting Layer 2 VPN service, MPLS protocol such as LDP, RSVP-TE should be implemented for supporting LSP and LDP proposed by Martini or BGP extended by Kompella. Also, MPLS protocol should be implemented for negotiating the specific Virtual Circuit .This paper firstly analyzes the advantages of MPLS L2VPN compared to MPLS L3VPN,then we focus on the research of MPLS L2VPN.For the two implementations of MPLS L2VPN : Matini and Kompella, we have a detailed comparison and analysis. Consider the real situation, we finally decide to use Martini to implement MPLS L2VPN. At last,with the ethernet swicth product,we complete the transplant of the MPLS L2VPN module on the company's software platform, and do some tests to verify the basic fuction of our code.