The Research Of IPSec Tunneling Based On Routing Switch Technology

The private network of traditional enterprises is not only high costs and inefficient but also companies and unbearable, which makes it is difficult to bear for many enterprises.As a tree-tier VPN, IPSec is a set of network communication protocol to provide security services. It uses the "end to end" approach to protect the entire data packet. It provides IP packet encryption and authentication to ensure the security when data is transmitted in the network. It mainly provides encryption and decryption technology, tunneling, user authentication technology and key sharing technologies. There are two kinds of package models (tunnel mode and transmission mode) to encapsulate IP packet encapsulation.The article research IPSce tunnel technology based on routing switching .The routing priority adjustment through the application in logical interface IPSec strategy and achieve physical link backup .We can achieve the goal of main physical link and backup physical link mutual switching and ensuring that the data security and uninterrupted transmission to the destination through the routing priority adjustment.VPN technology and routing technology combined through IPSce tunnel technology of switching routing ,realizing the switching between static routing and VPN routing ,solving the data will not interrupt transmission in large network topological environment.In this thesis, the problems have been solved that the common single link IPSec network and it could not adapt to the large-scale network through the single VPN tunnel technology. For the network environment with complicated network topology and highly network traffic, the network based on the IPSec tunnel technology provided multiple physical links to ensure the uninterrupted data transmission, and realized the logical IP address borrowing physical interface. It saved a lot of public network IP and economic cost for the enterprise organizations, so it is a practical technology at the present time.