FC交换机中优先级技术的研究和实现

针对光纤通道（FC）交换机，研究并设计了一种三级优先级实施策略，保证高优先级数据以最快的速度从交换机调度输出。重点对输入端口VOQ机制、Crossbar分布式调度和输出端口控制等关键技术进行了描述，并基于Xilinx平台对交换机优先级的有效性进行了验证。验证结果表明，该策略满足FC交换机优先级调度要求。所做的研究为自主化FC交换机产品的研制奠定了有效的基础，也对采用FPGA实现各种网络协议具有积极的借鉴意义。

Research and Realization of Priority Technology Based on FC Switch

A kind of three level priority policy for fiber-channel switch is researched and designed to ensure the highest priority FC data frame to pass through the switch at the highest speed.The key techniques of the fiber channel exchange unit are described,including import VOQ policy,Crossbar distributed schedule policy and outport control.Based on Xilinx platform,the priority is designed,and the validity is checked by tests.This research lays the foundation for the self-design of fiber channel switch products,and has significance for the use of FPGA to realize avariety of network protocols.