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路由器要求提供高速转发性能及高服务质量(Qo S)。支持 Qo S的算法对缓冲队列进行分组调度。输出排队机制可获得要求的 Qo S,却缺少可扩展性 ;输入排队方式扩展性好 ,但缺少必要的 Qo S特性。采用输入输出结合排队方式 ,设计实现了可保证较好可扩展性和 Qo S的分组调度算法 DF2 Q。该调度算法引入反馈机制 ,很好避免内部拥塞和提高资源利用率。 DF2 Q提供和输出端公平排队近似的Qo S保证 ,保证路由器转发性能
Routers require high-speed forwarding performance and high quality of service (Qo S). Support Qo S algorithm for the buffer queue packet scheduling. The output queuing mechanism to obtain the required Qo S, but the lack of scalability; input queuing scalability, but the lack of the necessary Qo S features. Using input and output in combination with queuing, a packet scheduling algorithm DF2 Q that guarantees better scalability and QoS is designed and implemented. The scheduling algorithm introduces a feedback mechanism to avoid internal congestion and improve resource utilization. DF2 Q provides a Qo S guarantee of fair queuing at the output to ensure router forwarding performance