Analysis And Design Of Outbound Link Load Balance Based On Comware Platform

With the rapid development of the Internet technology, which has filled with a variety of Internet applications and services in all aspects of production and life of people, but what comes next is explosive growth in network traffic. According to the relevant information statistics, Internet traffic would be double every 100 days on average. On the other hand, since China's national conditions and geographical constraints, the general direction of Southern Telecom /North Netcom, Netcom via Netcom users links, telecommunications users via telecommunication link, and the delay of exchange visits between different operators will be terribly large, seriously affect the user experience. With the explosive growth in network traffic, single link exports already overwhelmed, the development of network link bandwidth is far behind the development of network technology. Many medium-sized enterprises, portals, campus users have adopted a multi-ISP and multi-outlet link ways to share the traffic pressure. But how to make use of multiple links to distribute traffic, according to the actual situation of how to distribute user traffic within the network outside the network, and how to make multi-link work, full use of network resources? Traditional routing strategy can alleviate this problem to some extent, but its configuration is inconvenient and can not adapt to dynamic network environments. Based on this, this project achieved the outbound multi-link load balancing on the basis of the H3C's version 7 software platform and multi-core products.Through the research of load balancing technology, this paper analyses the outbound multilink load balancing structure design, configuration models and process implementation, based on H3 C existing server load balancing model, through the platform relevant technical cooperation, to attribute packets which matches a virtual server. Through the Policy configuration, the principle of policy, the principle of sticky, the principle of proximity(static proximity, dynamic proximity), and bandwidth algorithm, least connections algorithm indepth analysis and research to achieve a multi-strategy link selection, choose a relatively the most for export traffic excellent export link. Finally, design test plan for the project and design test cases specifically for critical functions.This work focuses on the multiple connections to the same session through one outlet links by the principle sticky, and provides the ability to access external network for internal users by proximity, enabling users to get the best network experience. Meanwhile, for the features that H3 C multi-core systems management can be divided into control plane and data forwarding plane, proximity program was specifically designed to in two planes: to call the NQA probe detection in control plane, and to generating proximity entry in the data forwarding plane, as well as in user mode and the different processing mechanism in user mode and kernel mode, which greatly improved the proximity access performance. In addition, the link load balancing forwarding process have special treatment to ensure the son session can be assigned to the same outlet link. Finally this paper achieve a minimum connection algorithm, using the idea of multi-core independence scheduling, improve the efficiency of concurrency compare with the way to synchronize access to the critical resources.