S-BFD在SRv6场景中的应用研究  

Research on the Application of S-BFD over SRv6

作　　者：陈风航 程友清 石博文 CHEN Fenghang;CHENG Youqing;SHI Bowen(Wuhan Research Institute of Posts and Telecommunications,Wuhan Hubei province,430000,China;Fiberhome Telecommunication Technologies Co.,Ltd.,Wuhan Hubei province,430000,China;Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu province,210000,China)

机构地区：[1]武汉邮电科学研究院,武汉430000 [2]烽火通信科技股份有限公司,武汉430000 [3]南京航空航天大学,南京210000

出　　处：《网络新媒体技术》2022年第2期66-72,共7页Network New Media Technology

摘　　要：随着网络业务变得复杂,普通双向转发检测机制(BFD)在保证网络可靠性上有一定的局限性,而无缝双向转发检测机制(S-BFD)技术简化了状态机,通过单端环回报文来实现链路检测,提高了检测效率的同时降低了负载。因此,本文通过学习研究S-BFD和段路由(SR)技术的特点,提出了一种在SRv6场景实现S-BFD技术的方案。该方案的报文组装方式为软件接受配置信息,通过写可编程门阵列(FPGA)寄存器完成S-BFD报文组装,再由驱动芯片完成SRH头部封装。该方案通过软件读取FPGA中获取到的当前S-BFD报文的状态信息来判断链路状态,并将状态上报。实验证明本文所提S-BFD模块能够正常工作,并且在SRv6场景中相比普通BFD能够较快检测到链路变化。As network services become complex,common BFD has some limitations in ensuring network reliability.However,S-BFD simplifies the state machine and implements link detection by sending packets through a single-ended loop,improving detection efficiency and reducing load.Therefore,by studying the characteristics of S-BFD and SR technology,this paper proposes a scheme to implement S-BFD technology in SRv6 scenarios.In this scheme,the software receives the configuration information,writes the FPGA register to complete the S-BFD packet assembly,and drives the chip to complete SRH header encapsulation.In this scheme,the software reads the status information of the current S-BFD packet obtained from FPGA to judge the link status and report the status.Experimental results show that the proposed s-BFD module can work normally,and can detect link changes faster than normal BFD in SRv6 scenarios.

关 键 词：网络可靠性 S - BFD 状态机 链路检测 SR 技术 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]