Study on Multi-Protocol Label Switching and Its Application of Virtual Private Network

MPLS ( Multi -Protocol Label Switching : Multi-Protocol Label Switching ) technology is an open communication network using fixed-length labels to guide high-speed data transmission and exchange new network technology . Since 1997 , MPLS technology has been developing rapidly with its characteristics of high efficiency . MPLS technology is the integration of the Asynchronous Transfer Mode (ATM: Asynchronous Transfer Mode) connection-oriented and connectionless IP (Internet Protocol) to the development of the technical advantages of its value lies in a connectionless network the incoming connection mode characteristics , support for multiple network layer protocols . MPLS is not to replace the IP protocol, but the enhancement on the IP . From the concept of MPLS basic principles , the signaling protocol to three applications of MPLS (quality of service , traffic engineering , virtual private network VPN: Virtual Private Network) system MPLS VPN application is the key , MPLS VPN the application can be described as a \This section contains the background of the MPLS VPN technology , the contents of the MPLS VPN advantages of different implementations , MPLS VPN , also discussed the challenges facing the MPLS VPN technology and future development issues . Combined with practical application, around the Zhejiang Telecom MPLS VPN construction should pay attention to several key issues on MPLS VPN application deployment and implementation of recommendations , such as the setting of the route reflector (RR: Route Reflect) , routing target / Zhejiang _ [ industry University, a master's degree thesis route set identifier (RT / RD, Routing Target / Route Distin Luo isher ) , the adjustment of the routing system has Internet access (Intemet) the MPLs vPN implementations , MPLS VPN service quality as well as network the tube system , such as , in particular focus on the inter- autonomous system ( As : autonomy system ) MPLS VPN implementations , and the next project construction made ??constructive suggestions . Finally, analysis of the existing problems for MPLS , the future prospects for development are discussed .