Programming The IPVPN For Guizhou Net Communication Co.

IP Virtual Private Network---IP VPN refers to the private interior network which is built without the limit of region but under the unite controlling and management of corporations through the public IP network. With the public data network as its basic flat, it shares resources of Internet with other users and is under the network management of corporation unite strategy at the same time.On the one hand, because of the sharply increasing of network using and the relative deficiency of money, IP VPN becomes principal technology in building network. As a new local telecom service provider, Guizhou Net Communication Co. should build a flexible and convenient network to attract clients and provide a variety of service; On the other hand, with the amalgamation of the current telecom technology and IP technology, IP VPN, which has Quality of service (Qos) and security guarantee, will be the basic flat in future telecom network. Nowadays both NGN network and 3G mobile communication network(will be in the construction) of Guizhou Net Communication Co. need to use IP VPN technology. To build an IP VPN network of Guizhou Net Communication Co. with an appropriate technology is the common requirement of the development of business and progress of network. It is significant.The thesis first discussed the technology of tunnel and label switching in IP VPN. With the latest technology, in a detail it discussed layer 3 MPLS VPN technology and all kinds of layer 2 MPLS technology in label switching. Then it demonstrated that layer 3 MPLS VPN has high security, the ability of overloading multi-service, function of routing and can realize central management and configuration. It has mature and credible technology and is the most appropriate IP VPN technology for the development of telecom service provider. On the basis, it analyzed the security of MPLS VPN and the characteristic of QoS, and proved the high security of layer 3 MPLS VPN , then by combing with technology of differ service and TE(Transfer Engineering), it proved layer 3 MPLS VPN can provide QoS of low delay and high reliability to satisfy the need of telecom network. According to the latest two planes network and IPTN technology, this thesis tracked analyze the new developing direction and trend of MPLS VPN.Based on the discussing results above, taking the investment benefit into sufficiency consideration, the author combined the true condition of IP network and transfer network of Guizhou Net Communication Co., calculated the scale of network...