摘要： 实现了一种在光纤同轴电缆混合接入(HFC)中连接电缆网络和以太网的透明网桥。该网桥基于电缆数据传输业务接口规范协议，在MAC层实现了MAC地址动态获取、MAC帧过滤和转发功能，利用生成树协议从逻辑上切断冗余的网络连接，将环路拓扑缩减为树形结构，从而解决了HFC网络中的环路拓扑结构造成的数据回传问题。该方法已经成功用于自主开发的物理层和MAC层芯片组成的HDTV双向系统平台，通过验证能有效去除网络冗余，防止广播风暴的产生。
关键词:
光纤同轴电缆混合接入,
电缆数据传输业务接口规范,
透明网桥,
生成树,
桥接协议数据单元
Abstract: This paper presents a design of transparent bridge which can connect cable network and Ethernet in HFC network. The bridge is designed based on DOCSIS and supports MAC address learning, MAC frame filter and forwarding on MAC layer. The spanning tree protocol is employed in order to deactivate redundant network connections logically and reduce the topological loops to a tree topology consequently solve the problems of data feedback which result from the topological loops in HFC. The design has been successfully applied to the bidirectional system platform for HDTV, which consists of PHY chip and MAC chip developed in the authors’ lab. The design can effectually deactivate network redundancy and prevent the generation of broadcast storm.
Key words:
hybrid-fiber/coax (HFC),
data-over-cable service interface specifications(DOCSIS),
transparent bridge,
spanning tree,
bridge protocol data unit (BPDU)
中图分类号:
赵 璧;王 沁;张晓彤. HFC网络支持生成树协议的透明网桥研究与实现[J]. 计算机工程, 2007, 33(23): 243-245,.
ZHAO Bi; WANG Qin; ZHANG Xiao-tong. Research and Implementation of Transparent Bridge Supports Spanning Tree Protocol in HFC[J]. Computer Engineering, 2007, 33(23): 243-245,.