XML-based configuration management for IP network devices

As the Internet continues to grow, the tasks of operations and management of IP networks and systems are becoming more difficult. Over the past few years, much effort has been given to improve the deficiencies of SNMP, but most have failed to be standardized. One critical deficiency of SNMP is in the area of configuration management. Recent work focuses on the use of XML technology for network and service management as an alternative or complementary approach to SNMP. This article presents the IETF's latest effort, Netconf, which is viewed by many as a promising revolutionary solution for configuration management. To validate this new effort, we present the design and implementation of an XML-based configuration management system based on Netconf. We also discuss our experience with XCMS and make some suggestions for improving the current Netconf protocol.     

XML‐Based Network Management for IP Networks

XML‐based network management, which applies XML technologies to network management, has been proposed as an alternative to existing network management. The use of XML in network management offers many advantages. However, most existing network devices are already embedded with simple network management protocol (SNMP) agents and managed by SNMP managers. For integrated network management, we present the architectures of an XML‐based manager, an XML‐based agent, and an XML/SNMP gateway for legacy SNMP agents. We describe our experience of developing an XML‐based network management system (XNMS), XML‐based agent, and an XML/SNMP gateway. We also verify the effectiveness of our XML‐based agent and XML/SNMP gateway through performance tests. Our experience with developing XNMS and XML‐based agents can be used as a guideline for development of XML‐based management systems that fully take advantage of the strengths of XML technologies.     

Development of SNMP‐XML translator and gateway for XML‐based integrated network management

The research objective of our work is to develop a SNMP MIB to XML translation algorithm and to implement an SNMP‐XML gateway using this algorithm. The gateway is used to transfer management information between an XML‐based manager and SNMP‐based agents. SNMP is widely used for Internet management, but SNMP is insufficient to manage continuously expanding networks because of constraints in scalability and efficiency. XML–based network management architectures are newly proposed as alternatives to SNMP‐based network management, but the XML‐based Network Management System (XML‐based NMS) cannot directly manage legacy SNMP agents. We also implemented an automatic specification translator (SNMP MIB to XML Translator) and an SNMP‐XML gateway. Copyright © 2003 John Wiley &Sons, Ltd.     

一种面向对象的自主网络管理模型

针对ＳＮＭＰ协议的局限性,将网络管理信息在被管对象和网管对象两个层次上进行抽象;给出了网管对象的语义及自主网管代理Ａｇｅｎｔ的形式化描述;并基于此设计了一种实现高层网管功能的自主网络管理模型。使用这一网管模型,能使网络管理的结构规范、清晰;便于扩充网管功能;并易于实现两个网络系统间的交互和合作。     

Web Services‐based network management: approaches and the WSNET system

While the Simple Network Management Protocol (SNMP) is still the dominant protocol for managing network elements in IP‐based networks and the Internet, network managers are acknowledging its limitations with respect to configuration management, application development and decentralization of management tasks. Web Services (WS) have been recently proposed to alleviate these limitations, given their pertinence to both decentralized management paradigms (e.g., CORBA), and XML management systems which provide efficiency in configuration management operations. This paper reviews architectures for WS‐based network management, outlining their advantages and disadvantages. These architectures address management of both individual network elements and composite multi‐device networks. Moreover, the paper introduces the architecture of a prototype system for WS‐based network management, namely WSNET. Along with presentation of the WSNET system, we provide a set of experimental results reporting performance figures for the WSNET system, as well as for systems based on other WS architectures. These figures allow for a comparative evaluation of the various systems, and manifest the benefits of the WSNET implementation. An important conclusion from our work is that WS should be seen as an accompaniment to conventional SNMP management rather than a replacement. However, there are also cases (e.g., need for secure remote access) where WS serve as a core rather than auxiliary solution, given that conventional methods are not applicable. Copyright © 2006 John Wiley & Sons, Ltd.     

基于XML的高校信息集成平台的研究

研究高校综合管理过程中存在的信息孤岛问题,并提出相应的解决方案,以及使用的关键技术。重点分析数据库数据到XML文档数据转换的方法、XML文档存储模式以及将XML查询转化为SQL的查询转换问题。该方案简单易行,既实现了应用系统间的数据交换与共享,同时也保留了已有的信息资源,保证了各部门仍然可以按照原来的方式运行。     

基于SNMP的带外服务器的研究

分析了基于SNMP协议的网络管理结构及在嵌入式带外服务器中实现SNMP模块的重要性,详细说明了SNMP Agent的工作流程.在原有的基于嵌入式Linux平台的带外管理系统中增加了SNMP模块,增强了该系统的网络可管理性,可以通过网络管理工作站对其进行监控和维护.     

On management technologies and the potential of Web services

From the early days of management research and standardization in the late 1980's, there has always been a quest for a management technology that would be general enough to be used for network, system, service, and distributed application management; efficient in terms of information retrieval time, computational resources required, and management traffic incurred; and easy to use in order to reduce development time and operational costs. From protocol-based approaches such as OSI management and SNMP, attention shifted to distributed object and Web-based approaches. Recently, XML-based approaches and, in particular, Web services have been emerging as a promising Internet-based technology that might also be used for management. In this article we survey first the key aspects of protocol and distributed object approaches to management. We subsequently examine Web services as a distributed object approach to management, and consider its suitability, usability, and performance in comparison to SNMP and CORBA.     

基于移动agent的SNMP网管性能研究

本文针对SNMP网管所存在的问题,基于移动agent技术构建了一个与平台无关的运行环境,利用SNMP移动管理者和代理群实现动态的软件部署模式和多样的网管方式,使SNMP网管适应不同类型的被管设备和不同层次的管理需求,既兼顾已有系统,又提高网管性能.实验表明,移动agent技术能够为SNMP网管带来快速、灵活和高效的管理过程.     

SNMP GetRows: an effective scheme for retrieving management information from MIB tables

Management information accessible via SNMP is organized in the Management Information Base (MIB). Many management applications are based on management information within an MIB table. The management information useful for management applications may be located in some rows of an MIB table. Owing to the limitation of current SNMP GetNext and GetBulk services, it is usually inevitable to retrieve all the rows of an MIB table even if some of them are needed. As the size of the MIB table grows, the object retrieval will incur considerable bandwidth and latency. Without loss of the simplicity of SNMP, we propose a novel SNMP service, called GetRows, to provide the capability of object selection via SNMP. Using GetRows, a management application can specify criteria for evaluating rows of an MIB table. Only the object instances in the rows selected by the criteria will be retrieved. Thus, less bandwidth and latency can be achieved by using the proposed GetRows service. Copyright © 2006 John Wiley & Sons, Ltd.     

ERP系统在人力资源管理中的应用探究

信息化时代要求企业人力资源管理也实现信息化。笔者结合ERP系统的优势,运用XML技术,开发出一种新型人力资源管理系统,在实际应用中也取得良好效果。本文首先介绍ERP发展历程和工作原理,然后对XML技术结合ERP系统开发出的人力资源管理系统进行简要介绍,并分析其在人力资源管理中的应用,希望能提高人力资源管理的信息化水平。     

利用SNMP获取网络资源信息

介绍了SNMP协议的概念，讨论了利用SNMP协议获取网络资源信息的思路，分析了利用SNMP协议获取网络资源信息后，建立一个基于IP的网络管理系统的实现方案．     

利用XML和Excel设计动态通用报表系统的新方法

提出一种利用XML和Excel设计动态通用报表系统的新方法。首先对Excel报表模板进行分解,生成报表模板的报表信息、架构信息和映射信息,再根据统计模板生成统计分析信息,这些信息均以XML文档的形式存入数据库。在系统运行时,将用户上报的Excel文件中的报表数据提取出来,以XML文档的形式存入数据库。然后结合XPath和XQuery对报表数据进行统计分析,得到统计报表数据。最后将统计报表数据组装为Excel文件输出给用户。采用这种方法设计的报表系统动态灵活、通用性强。     

PKG‐VUL: Security Vulnerability Evaluation and Patch Framework for Package‐Based Systems

In information security and network management, attacks based on vulnerabilities have grown in importance. Malicious attackers break into hosts using a variety of techniques. The most common method is to exploit known vulnerabilities. Although patches have long been available for vulnerabilities, system administrators have generally been reluctant to patch their hosts immediately because they perceive the patches to be annoying and complex. To solve these problems, we propose a security vulnerability evaluation and patch framework called PKG‐VUL, which evaluates the software installed on hosts to decide whether the hosts are vulnerable and then applies patches to vulnerable hosts. All these operations are accomplished by the widely used simple network management protocol (SNMP). Therefore, system administrators can easily manage their vulnerable hosts through PKG‐VUL included in the SNMP‐based network management systems as a module. The evaluation results demonstrate the applicability of PKG‐VUL and its performance in terms of devised criteria.     

基于XML的数据在数据库中的存取技术

近年来,基于XML的数据交换与存取技术成为数据存取和交换领域的一项重要课题。XML不仅作为一种互联网上数据表示和交换的标准,而且被应用于电子商务、搜索引擎、电子数据交换等很多方面,因此受到了广泛的关注。文章将此技术展开分析,探讨了XML数据存取机制,分析了XML在数据库中的存储模式和应用模式,并结合Oracle8i给出应用举例。     

XML数据库技术在多星管控系统中的应用

XML作为数据表示和交换的标准在信息系统的建设中得到了广泛的应用,如何使XML文档导入数据库以及如何使数据库中的数据转换为XML数据已成为亟待解决的关键问题。在研究XML文档特征的基础上,论述了2种主要的基于XML的数据库的类型及其特性。通过对多星业务管理控制系统体系结构和存储数据内容的特征分析,利用ORACLE对XML的支持机制,给出了基于XML-Enabled数据库的多星管理控制系统数据存储设计的实现方法。     

一种基于网络管理的CORBA/SNMP网关模型的构建

首先介绍了分布式CORBA技术在网络管理中应用的必然趋势，通过分析基于传统的SNMP和分布式CORBA两种网络管理体系的结构框架以及JIDM规范，提出了一种新的基于网络管理的CORBA／SNMP网关模型框架。最后，介绍了搭建CORBA／SNMP网关模型所需要的开发平台并基于此开发平台进行了相关的试验和仿真，其结果进一步表明本文所提出的模型是适用的、正确的、能够将现有的SNMP网管系统集成到CORBA网管系统中。     

基于XML网上书店系统的设计

XML是新一代网络数据表示、传递和交换的标准,是Internet环境中跨平台的、依赖于内容的技术。XML的新特性改变了人们在网络的交换方式,加速了电子商务的发展。网上书店系统体系结构采用B/S结构,MSVS2005作为B/S结构应用程序的开发工具。在开发中采用基于XML技术及MSSQLServer2005数据库技术,实现了用户登录注册、图书信息浏览、图书搜索、购物车、书籍管理、结账、生成订单等主要功能,使系统具有方便快捷、界面友好、可移植等特点。