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With the computer science and the rapid development of Internet, The use of network technology platform in the network issued a user space data or spatial data through the web browser is a geographic information system (GIS) the inevitable trend of development. Geographic Information System (GIS) needs a good bearer network platform to run their application systems and large-capacity data exchange tasks.Many in today’s large-scale construction of the network platform, it also adopted the Network (VPN)' dissertation">Virtual Private Network (VPN) network technology, VPN technology provides a use of the Internet backbone and opening up the advantages of the new solution, the construction of wide-area network technology is the best solution. Quarter of VPN technology uses authentication, access control, confidentiality, data integrity and other measures on the public network for the government, enterprises build secure, reliable, convenient and efficient private network, and save money, but also a low cost, easy-to-manage , costs less, the high degree of flexibility, confidentiality, and low maintenance costs.MPLS VPN is a means to build technology based on MPLS virtual private network, using MPLS technology, in the public IP network built on government / enterprise IP private network, data, voice, video and other multi-service broadband connections, combined with differences in services, traffic engineering such as technology, to provide users with high-quality services. Multi-Protocol Label Switching (MPLS) technology is the absorption of the ATM switching technology and IP routing flexibility of the two major advantages of next-generation backbone network technologies.In This article, based on geographic information system in Guiyang City (GYGIS) application requirements and network status, in MPLS-based VPN technology principle and the basis of the work, given the expansion of BGP-based MPLS VPN to achieve a geographic information system in Guiyang City (GYGIS) data exchange platform for the network of models and the use of MPLS VPN technology in different business systems to achieve isolation or inter-exchange control, to resolve the address inter-departmental conflicts. At the same time, an analysis of geographic information system in Guiyang City (GYGIS) application system composed of various business departments and data types, access needs, planning for the VPN, including the model of all equipment and its functions, the definition of VRF, the VPN rules to determine (as defined in RD and route-target), and completed the course in the actual deployment of the whole network equipment installation, configuration and performance tests. Finally, an analysis of advantages of MPLS VPN technology and its applications.
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