基于ATM技术的计算机网络中心子系统

ATM-based System of Computer Networking Center of China Seismological Bureau

扼要概述了 ATM网络的技术特点 ,详细介绍了计算机网络中心计算机网络的系统构成及其特点 ,重点介绍了“地震分析预报网络信息管理与服务系统 (APNET)”的网络应用。网络中心通过扩频微波与中国地震局京区单位相联 ,通过卫星通讯链路、X.2 5专线与全国各省、自治区、直辖市地震局局域网相联 ,通过中国金桥网和中国科教网接入 INTERNET。计算机网络中心采用 IBM82 65ATM交换机作为网络主干 ,通过光纤连接 6个分离的局域网段 ;采用 2台 IBMRS/60 0 0 H50作为主服务器 ,在其上运行 DB2数据库系统及 Tivoli网管软件。网络中心的计算机系统作为一个软、硬件平台 ,它既对网络运行、网络安全进行管理 ,又为系统网络提供INTERNET出口。目前 ,网络中心提供的服务有 DNS服务、E- mail服务、WWW服务和 Proxy服务以及地震会商信息查询服务 (APnet)等。

This paper briefly describes the technology and characteristi cs of ATM networking, introduce systematic composition and features of the networking of Computer Networking Center of China seismological Bureau (NC-CSB) in detail, an d mainly shows one of networking applications namely "Information Network for Ear thquake analysis and prediction (short as APNET)". NC-CSB is connected to INTER N ET through ChinaGBN and CERNET, to direct departments under CSB in Beijing throu gh Extra-Frequent Microwave and to nationwide departments of CSB with satellite communication link path and X.25 leased line. NC-CSB makes use of IBM 8265 intelligent Route Switch to build the main fr a mework of the ATM enterprise network and connects 6 separate local network segme nts through fibers. The enterprise servers of NC-CSB are two IBM RS/6000 H50 ma c hines, which are installed HACMP and run DB2 database as well as Tivoli Network Management. The hardware and software platform of NC-CSB is not only manages th e running and safety of network, but also provides the INTERNET connection for lo cal network. Currently, many services such as Domain Name Service, E-mail Servi c e, Web Service, Firewall Service, Proxy Service and seismological information qu ery (APnet) service are provided.