双向转发检测及其设计实现  

Bidirectional Forwarding Detection and Its Implementation

作　　者：周三友[1] 李吉良[1] 周玉娟[1] ZHOU Sanyou;LI Jiliang;ZHOU Yujuan(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所

出　　处：《无线电通信技术》2019年第5期565-568,共4页Radio Communications Technology

摘　　要：双向转发检测(Bidirectional Forwarding Detection,BFD)是一种简单、快速、通用的连通性检测机制,有利于快速检测故障,降低设备故障对业务的影响。对BFD的工作原理、报文格式进行了简要介绍,采用一种分布式处理方式设计实现了BFD。通过控制交换板的CPU进行BFD会话管理,利用线路接口板的网络处理器进行BFD包的快速发送、接收和故障检测,避免了大量BFD包对控制交换板CPU的冲击,提高了设备稳定性。BFD is a simple,rapid and general way of connectivity verification,which can detect faults rapidly,and alleviate the influences of device faults.In this paper,the operating principle and message format of BFD are briefly introduced at first.Then a distributed BFD implementation scheme is described,where BFD session management is conducted by the CPU of control switching board,the rapid transmission,reception and fault detection of BFD packet is conducted by the network processor of the line interface board.By this way,the impact to the CPU of control switching board caused by the massive BFD packets is avoided,and the device stability is improved.

关 键 词：双向转发检测 网络处理器 分布式处理 

分 类 号：TN915[电子电信—通信与信息系统]