网络管理协议SNMP和CMIP的比较分析

网络管理协议是计算机和通信网络管理的关键问题之一,简单网络管理协议(SNMP)和公共管理信息协议(CMIP)是两类重要的网络管理协议,论文针对这两种不同的网络管理协议分析它们在管理服务、对象操作、通信支持等方面的异同点,并讨论它们的应用及选择建议。     

Java- and CORBA-based network management

Systems to manage distributed heterogeneous networks and services must often use off-the-shelf components and leverage legacy applications. Much of the telecommunications industry uses a network architecture based on CMIP (Common Management Information Protocol) to manage networks and services, while much of the Internet uses the SNMP (Simple Network Management Protocol). To provide distributed network management, the telecommunications industry must accommodate both, Nokia developed the Distributed Computing Platform prototype to support the creation, management, and invocation of distributed telecommunications services. Using CORBA as a base, DCP handles network management by adding managed-object models and protocols. It provides mechanisms that allow communication between CMIP-based objects and a gateway for SNMP-based systems. The prototype also allows users to access network information via Web browsers, CGI gateways, and Java or HTTP daemons. The Nokia engineers also discuss the lessons they learned about Java and CORBA integration     

SDH专网的接入网网络管理系统设计

接入网是通信发展演变的主要方向之一,从网络管理的角度来看,接入网也是最复杂,最难管理的网络之一。由于光通信技术已经基本成熟,光纤接入网已成为当前接入网市场的主流。在本文SDH光纤接入网中,为了适应用户网络多种业务接入的需要,采用V5这一国际标准的数字接口作为接入网连接公共电信网的纽带。同时接入网中必须提供Q3接口,以实现电信管理网对接入网侧V5接口的管理。首先研究SDH光同步数字传输网络与专网通信。对基于本项目2.5G光纤接入平台的V5接入网,分析其V5接口结构、功能、相关协议以及V5接口系统的实现方案。在此基础上,探讨了电信管理网(TMN)的体系结构,相关协议与管理信息库。提出一种基于TMNQ3代理(Agent)的方案——管理者-代理-后台的设计方案,分析此方案的信息模型、通信协议栈及模块划分。接着,根据迈力特2.5G光纤综合业务传输网络的实际情况,在不更改此方案信息模型的基础上,用SNMP实现SDH接入网的管理并阐述其具体实现。在此之后,通过一致性测试和功能行测试,对该软件测试行进说明。     

TMN-Based interoperability network administration interface

While the networks of different Telecommunications Administrations forming a global network are interconnected, their Network Management Systems (NMSs) are isolated from each other. As a result, various network management functions (e.g., configuration, fault management) necessary for managing the network resources common to the administrations require extensive manual coordination and exchange of information using telephone and facsimile. In this paper, we present a standards based interoperable interface between network management systems belonging to different administrations. The interface is based on Telecommunications Management Network (TMN) architecture and standards. It is intended to automate and standardize information exchanged between the administrations so that network maintenance and provisioning activities could be done with minimal human involvement at the far-end administration. The interface provides significant benefits in improving the quality and the cycle time of provisioning and maintenance, implementing proactive maintenance, and greater awareness of the end-to-end performance of the managed resources.     

一种通过资源和操作进行权限控制的TMN安全方案

TMN(Telecommunication Management Network，电信管理网)是ITU-T提出的关于电信网络管理的解决方案，该文简单介绍TTMN的体系结构，并提出了一种针对资源和操作进行权限控制的TMN安全管理方案。     

A customer-to-carrier interface for trouble administration

This paper describes a customer-to-carrier trouble administration service based on the Network Management Forum (NMF) service management concept. Implementing a trouble administration gateway for direct on-line submission and interaction of trouble tickets is being realized through a standard interface known in industry as Electronic Bonding. This interface supports connectivity between an ISO/ITU-T Common Management Information Protocol (CMIP) manager and multiple agents. A Defense Information Systems Agency (DISA) project, described herein, enables a customer, acting in a manager role, to track trouble reports across public carrier networks.     

Realizing a TMN

A functional partitioning of a TMN in terms of management functional areas and functional layers is proposed. This new method for classifying TMN functions is used to suggest logical expansions of the function decomposition in ITU-T Recommendation M. 3400. The method is also shown to be a useful tool for graphically comparing the functionality of Operations Systems that are already deployed, showing how they are positioned within a real TMN. Further, the new classification scheme is applied to the representation, in tabular form, of the functions of a particular example of a deployed OS.Industry standard open interfaces using the Common Management Information Service Element (CMISE) in the context of Open Systems Interconnections (OSI) protocols and the Generic Network Information Model are also being implemented. An example of a Q3 interface (between Operations Systems and Network Elements) and an example of an X interface (between different administrative jurisdictions) are discussed.Progress is being made on infrastructure software components that will ease implementations of TMN functions in a distributed processing environment. Future directions, such as the use of evolving Open Distributed Processing (ODP) specifications in distributed network management, are discussed.     

SNMP与拒绝服务攻击

众所周知，SNMP(简单网络管理协议)已广泛用于网络设备的监督和管理。但是最近的研究表明，许多实现此协议的网络设备都可能不同程度的受到拒绝服务的攻击，本文分析了其中存在的一些弱点，并提出了预防的手段。     

基于SNMP协议的ForCES路由器网络管理*

首先分析转发与控制分离（ForCES）体系结构;接着讨论了ForCES结构路由器的网络管理问题,分析ForCES结构在实现常规网络管理上的主要问题和困难点;最后着重提出用简单网络管理协议（SNMP）及其扩展代理协议AgentX对ForCES结构路由器进行有效网络管理的方法。     

Use of multi-attribute decision analysis for designing operations system framework in telecommunications management network

This paper is concerned with the design of an Operations System (OS) framework for implementing a proper telecommunications network in Korea Telecom. Since several types of OS frameworks are under consideration, the telecommunication network manager should now choose the best alternative for use later in establishing the infrastructure of operations systems. The decision making is done in this paper by means of a Multi-Attribute Decision-Making (MADM) analysis. A point to be noted in the present case is that the decision relevant information such as attribute weights and values of alternatives are not known exactly. Rather, these are to be taken in the form of rankings and/or bounds. To deal with such incomplete information, we employ a mathematical programming model-based MADM approach to the choice of an optimal OS framework design. This approach enables us to check dominance of alternatives and to obtain a set of non-dominated alternatives from evaluating five alternatives in reference to Telecommunications Management Network (TMN) standards.

Scope and purpose

Telecommunications Management Network (TMN) can be stated as a globalized and unified skeleton to meet the advanced operational environments of telecommunications networks and to handle heterogeneous and complex network elements. Although there are various subjects that should be addressed to accomplish TMN, we confine our attention to dealing with one important subject, design of an Operations System (OS) framework. This is necessary to manage telecommunications resources including networks in effective manner and for use as guidance in developing individual operations systems and in constructing a network management center.Several types of OS frameworks have been suggested by TMN standards. It is hence needed to evaluate each of these OS frameworks and then to choose an appropriate one in Korean TMN situation. Since this evaluation involves multiple criteria (or attributes), it is realized in this paper by a Multi-Attribute Decision-Making (MADM) analysis approach. The decision relevant information such as trade-off weights and individual criterion values are elicited from expert opinions which, however, is rather incomplete than exact numerical values. The decision making process with the incompletely identified information is presented in this paper.     

Information model for capacity management in global telecommunication networks

Capacity Management in Global Telecommunication Networks (GTN) offers the foundation for fast transport network reconfiguration between country-pairs to meet the time-of-day or on-demand capacity needs. When combined with fault management, it provides several efficient restoration alternatives. The network management model developed for GTN consists of a two-tier system managing the undersea fiber optic cable capacity at E1 (2.048 Mbps) level. The interface between the two-tiers is a CCITT Telecommunications Management Network (TMN) X-interface. The objectives of this paper are to describe the network capabilities and the information model for the X-interface. The paper also contains an example scenario that describes the implementation of the X-interface through passing Common Management Information Services Elements (CMISE) between the manager and agent processes.     

A layered approach to network management control

Public telecommunications networks have many supporting operations systems to provide network management functions and operational support. These systems must be coordinated to provide a highly reliable network service and to make best use of network resources. With increasing automation of network control, these systems must evolve to provide total network support. One organizing principle for this evolution is the definition of control layers at which individual control functions are exercised. We describe a proposal for layered control, with particular emphasis on the role of network traffic management. Layering will be a significant study item for the next extensions to CCITT's Telecommunications Management Network (TMN) recommendations.     

Coordinated approach to telecommunications management

The RACE (research and development in advanced communications in Europe) program embraces all the issues surrounding the development and deployment of integrated broadband communications in Europe. In the RACE program, the domain of network management encompasses the concept of using a separate network to manage the telecommunications network itself. This separate network is called a telecommunications-management network (TMN). Guideline, a project created to coordinate all the TMN work done in RACE, develop a common approach to TMN architecture, and recommend which AIP techniques would be appropriate, is described. Guideline provides an interface to RACE projects outside the TMN area and to international standards organizations and other trade groups. It also provides an interface to the TMN specifications projects, Netman and Terrace     

主动对象模式在NMS适配器中的应用研究

国际电信联盟将电信管理网分为五层:网元功能层、网元管理层、网络管理层、业务管理层、商业管理层,其中网络管理层的网管属于高层网管,管理着大量网元层网管,因此,网络层网管南向适配器一般采用分布式部署。但是在分布式网络层网管的南向适配器的登录过程中,如果是同步调用过程,就会花费大量时间。针对这种情况,本文提出了采用ACE提供的主动对象模式,这种模式可以构建线程池以实现多线程调用,以异步调用的方式登录网络层网管的南向适配器,从而解决了登录时间过长的问题。     

网际管理信息库中模板转换技术的实现

TMN与SNMP网管系统的互操作技术,成为计算机网络与电信网络有效互连的关键技术之一。而网络管理信息库(MIB)包含了管理信息的定义,是网络管理的核心部件。文章分析了委托代理的工作原理,在IIMC研究的基础上,提出了SNMP-TMNMIB的转换机理及其转换的JAVA方法实现,为MIB的开发奠定了基础。该方法替代了手工转换,提高了效率并减少了因繁杂手工工作带来的错误。其显著优点是集中采用一个委托代理实现管理者与整个子网或多个网络设备间的CMIP与SNMP的协议转换,它比在每个被管网络设备内嵌入CMIP代理经济、方便和有效。所采用的映射技术使Proxy具有扩展性,是一种具有实用价值的异网管理技术。     

CORBA在电信网络管理中的应用

国际电信联盟ITU提出的电信管理网TMN(Telecommunication Management Network)概念,目的在于建立一个具有综合管理能力的网管体系结构对电信网络进行有效的管理.而将CORBA应用到TMN中已成为必然趋势,需要利用CORBA在开发分布式系统方面的优势来构造具有强大功能的综合网络管理平台.阐述CORBA的技术特点和核心概念,并且基于这些技术特点,研究利用CORBA建立分布式网络管理的管理模型.     

用UML建立的电话网性能管理模型

根据军用电话交换网性能管理的实际需求 ,遵循TMN原理 ,应用UML建模技术建立了军用电话交换网性能管理的被管对象和管理系统的静态模型。     

基于CORBA的网络管理的若干关键问题研究

1 基于CORBA的网络管理体系结构网络管理的含义如图1的USE-CASE图示意。基于CORBA的网络管理利用了CORBA的分布对象模型和互操作机制,通过CORBA中间件来屏蔽掉各种被管理资源的异构性。基于CORBA的网络管理体系结构的一般结构如图2示意,CORBA服务在网络管理系统和被管理系统之间作为中间件,通过ORB进行通讯。CORBA应用于网络管理的目     

TMN中的Q3接口

文中首先简要介绍了ＴＭＮ中的各种接口,在此基础上重点讲述了适合于标准化、开放化管理的Ｑ３接口,并分析设计了Ｑ３接口中基于ＣＭＩＰ的管理信息模块。     

XML在网管协议中的应用及扩展

随着计算机网络的飞速发展，对于网络管理的性能要求越来越高。传统的简单网络管理协议已经不能够满足当前的需求。本文讨论了XML在网管协议中的应用和扩展，主要包括在数据说明，基于SNMP等传统网管以及基于SOAP／XML网管协议中的应用和扩展。