Each virtual route forwarding a routing specifier used to distinguish each others routes, 64 of the RD with 32-bit IP address of the general composition of the whole network of 96 unique VPN-IPv4 addresses. In this way, three different VPN VPN allows the internal use of the same address and affect each other. Between the PE router, multi-protocol defined by RFC2283 Gateway Routing Protocol extensions to pass VPN-IPv4 addresses, while still involved with the delivery address of the corresponding expansion of BGP attributes and VPN tags. One purpose of extended BGP route attribute is used to control the routing information to the virtual route forwarding relationship between the introduction and leads. When the VPN users data packets through any router port into the PE, PE router only call corresponding to this port to handle the virtual route forwarding the packet. PE router will mark this packet is marked with two layers, of which the outer tag is marked as IGP, indicating that the PE router from the PE router to the destination path; inner VPN tag marked to indicate the destination PE router, the information belongs to which VPN .
The Centre is actively expanding its staff size, the next 8 months, the center will reach hundreds of the number of employees. Plans to end fiscal 2010, the center will employ 300 or so. "MSIT is to contact Microsoft and user experience of a bridge, is a leading IT technology driven by the discoverer of the new business value and share those," Microsoft China R & D Group, Dr. Zhang Hongjiang, chief technology officer said, "Today, information has Chinas economic and social development of the most important driving force. IT technology, value has been recognized and understood all types of enterprises, IT systems are also changing from the traditional back office support for the new direct drive business development and corporate innovation boosters . "He also said Microsoft China R & D Group has established a set of basic research, technology incubation, product development and strategic cooperation as one of the innovation chain, and R & D center will become one of the MSIT a vital part. It was established once again that Microsoft is earnestly fulfill the commitment to China. This as an opportunity, Microsoft will further promote the win-win cooperation with local industry, the process at the same time, based on Chinas leading human resources and innovation potential of the deep, MSIT R & D center will help Microsoft China R & D Group