嵌入式网络化设备的可靠性与安全性设计  

Design of reliability and safety of embedded networking instruments

作　　者：黄皎[1] 江俊[1] 吴扬[1] 

机构地区：[1]河海大学计算机及信息工程学院,江苏常州213022

出　　处：《计算机工程与设计》2009年第2期278-281,共4页Computer Engineering and Design

摘　　要：嵌入式设备资源有限,为提高嵌入式网络化设备的可靠性,分析了网卡冗余备份技术的实现原理,提出了一种通过在驱动程序中实现双网卡冗余备份的方案,并设计了相应的冗余切换算法。该算法具有应用无关性的特点,切换效率高,并且保持了低的资源占用率。为提高嵌入式网络化设备的安全性,实现了MAC地址过滤和IP防火墙功能,禁止非授权主机的访问。该方法有效地提高了网络安全性,已经在具有双以太网接口的硬件平台上测试通过。The resource of networking instruments is limited, to improve the reliability of embedded networking instruments, the principle of NIC redundancy backup technique is analyzed, a double-NIC redundancy backup strategy in NIC driver is presented, and a redundancy switching algorithm is designed. The algorithm is independent on any special application, it achieves high switching efficiency, and has low code size and RAM usage. To improve the safety of the embedded networking instruments, the design achieves MAC address filtration and IP fire wall to abandon the visit of illegal host. It is effective to improve the safety of the network, and the test on a hardware platform with double NIC has passed.

关 键 词：网络化设备 冗余备份 网卡驱动程序 冗余切换 MAC地址过滤 IP防火墙 

分 类 号：TP212.6[自动化与计算机技术—检测技术与自动化装置]