Design And Implementation Of VPN Fast Constringency Based On VPN Priority

This theme comes from a practical project during the author's practicing in H Corporation. This project is triggered by the market requirement. I take part in this project and finish lots of works for design and coding.Virtual Private Networks provides a mechanism that allows service providers to use their IP backbone to provide VPN services to their customers [1]. As more and more VPNs are deployed in the BGP/MPLS IP VPN networks, the customers need higher constringency rate, meanwhile, some VPN customers need some services different from other VPN customers to ensure their private networks go well especially when the network troubles occurred [2].To satisfy these requirements, first we analyze the current process for the VPN routes. We find that how to improve the rate for processing the private routes and the VPNV4 routes is the core problem we should to deal with, because the private routes and the VPNV4 routes have a large number in the BGP/MPLS IP VPN networks. Then, we design the mechanism of cache table to solve the constringency rate problem and set the corresponding priority to deal with the different services in the chapter of design.In the chapter of implementation, we provide lots of new data structures to satisfy the requirements. And we also ameliorate the process of VPN routes to improve the constringency rate. Then, we design the corresponding mechanism to update the cache table and the priority lists.The whole project is administrated by the IPD-CMM and the quality of the project is very well.