PowerPC下双网冗余热备份高速切换技术实现  

Ethernet Adaptor with Redundancy Backup and Fast Auto-switching Based on PowerPC

作　　者：强景[1] 赵多[1] 王红兵[1] 

机构地区：[1]西安电子科技大学电子工程学院,西安710071

出　　处：《单片机与嵌入式系统应用》2016年第3期23-26,共4页Microcontrollers & Embedded Systems

摘　　要：网络冗余切换热备份技术大多与运行有嵌入式操作系统的控制芯片一起工作,该技术的应用有效增强了网络数据传输的物理可靠性,但是网络切换速度一直是这项技术的瓶颈。本文首先提出通过运行有Linux系统的MPC8377芯片以及外部连接CPLD和2片88E111PHY芯片完成网络冗余切换热备份的方案,然后依照方案设计对应软件,最终使得双网切换时间小于20ms,极大地改善了现存方案的切换速度,使得网络恢复加快、数据传输更加可靠。The technology of network redundancy switching backup mostly works with the control chip running with embedded operating system. The application of this technology can effectively increase the reliability of network data transmission, but the speed of network switching is a big problem. In this paper, firstly the control chip MPC8377 running with Linux system, CPLD and 2 pieces of 88E111 （PHY） complete the design of the network redundancy backup. Then the corresponding software is designed. Thus the time of the net- work switching is less 20 ms. In this way,the switching speed is improved and makes the transmission more reliable.

关 键 词：双网切换 网络冗余 LINUX MPC8377 88E111 PHY 

分 类 号：TP316.81[自动化与计算机技术—计算机软件与理论]