| 摘要: |
| 描述了一种千兆以太网TAP卡的设计与实现方法。该TAP卡可将千兆以太网上的数据帧复制到检测端口,并可在复制出的帧中插入精确的时间戳。使用FPGA完成数据帧的传输、复制及时间戳的插入,使用FPGA内的软CPU通过GPS接口实现精确的时间同步。掉电保护电路用于在TAP卡掉电或故障时保证被监测以太网链路的正常传输。本TAP卡可用于对软交换、3G网络等的维护和传输质量检测。 |
| 关键词: 千兆以太网,TAP卡,检测与维修,FPGA,GPS接口,时间同步 |
| DOI： |
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| 基金项目: |
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| Design and Implementation of a Gigabit Ethernet TAP Card |
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| Abstract: |
| The design and implementation of a Gigabit Ethernet TAP card is described.Using this TAP card,the frames of Gigabit Ethernet can be replicated and output to the TAP ports.In these frames accurate time stamps can be inserted.FPGA is used to implement these functions.The Nios II of the Altera FPGA is used to maintain the time synchronization with GPS.Because of the protection circuit,the monitored link can work well even the TAP card is powerdown.This TAP card can be used in the maintenance and detection of the soft switch and 3G networks. |
| Key words: gigabit Ethernet,TAP card,detection and maintenance,FPGA,GPS interface,time synchronization |
《电讯技术》编辑部 