IPv6网络实现QoS路由的障碍和解决思路

Obstacles,Potential and Ideas of QoS Routing Implementation in IPv6 Network

大容量内存、高速CPU及接口的IPv6路由器支撑下的QoS路由是解决IPv6 QoS问题的一项关键技术。针对适应于IPv6网络环境的QoS路由成果为数不多的现状,本文分析了IPv6在实现QoS路由的过程中可能会遇到的障碍,挖掘了IPv6如何利用其简化报头、流概念、流量类型和流标签域支持QoS路由的潜能,提出借助IPv4 QoS路由研究的基础,兼容BE(best effort)路由和对现有路由体制改动小的、逐步演进的IPv6 QoS路由实现策略和扩展IPv6及其主流OSPFv3路由协议,改进算法的整体思路。最后指出为推动IPv6 QoS路由从理论研究走向实际应用还需加强的研究方向。

QoS routing supported by IPv6 routers owning large capacity memory, high speed CPU and interfaces is a key technology of solving IPv6 QoS. On the status of fewer QoS routing methods adapted to IPv6 environment have been developed, this paper analyses the obstacles met possibly by IPv6 QoS routing, such as the current IPv4 QoS routing schemes are not appliable, the multiple QoS metrics are difficult to be expressed and their updates cost much to be flooded and so on. It develops the potential for IPv6 of how to use its simplified packet header, flow concept, traffic class and flow label fields to support QoS routing. It also proposes the evolving strategy of implementing IPv6 QoS routing step by step from the study base of IPv4 QoS routing, which is compatible with traditional BE （best effort） routing and has little influence on the current routing system, and the ideas of extending IPv6 and its main OSPFv3 routing protocol and improving the algorithms. In conclusion, it points out the farther research directions for deploying IPv6 QoS routing theories in practice.