以太网的环路检测技术

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[摘要] 以太网在局域网中取得了巨大的成功，但是在城域网应用领域中仍需要解决网络环路的相关问题。根据不同的以太网应用领域，文章分析了几种环路检测的解决方案，包括生成树协议(STP)、以太网环路保护切换协议(ERPS)、环回检测和成环点定位技术。其中，成环点定位技术新颖实用，非常适合各种以太网局域网和城域网，对于以太网的运行和维护都有很大的意义。目前，全球的标准组织均正在积极对以太网环路检测技术进行标准化，随着标准的不断成熟，以太网的环路检测技术将逐步降低以太网的环路风险，提高以太网的可靠性，便于网络的管理。

[关键词] 以太网；环路；检测；可靠性

[Abstract] Using Ethernet in the local area network (LAN) has been very successful. However, for applications in a metropolitan area network (MAN), loop problems still need to be resolved. In this paper, several loop detection solutions are analyzed, including spanning-tree algorithm and protocol (STP), Ethernet ring protection switching (ERPS), loop detection, and loop point location technology. Loop point location is suitable for a variety of Ethernet LANs and WANs, and is very important for OAM in LANs. Domestic and international standards organizations are currently standardizing loop detection technology for Ethernet. When standards are mature, loop detection technology will gradually reduce the risk of loop in Ethernet, increase Ethernet reliability, and make network administration more convenient.

[Keywords] Ethernet; loop; detection; reliability