A Foundation for Generalized Network Fault Management

随着计算机通信网络从提供尽力而为的服务 服务，以提供具有严格服务质量的实时服务 (QoS)保证（例如视频），需要改进故障管理 技术增加。网络故障管理是一个开放的问题， 复杂性不断增加。 增加的一个主要原因 这个问题的复杂性在于网络的异构性。网络 今天的移动通信系统由各种技术（例如无线，ATM， 以太网），预计将支持各种网络 应用程序（文件传输、WWW、视频会议）。 故障 管理问题已经在不同程度上研究了不同的 技术，但还有许多悬而未决的问题29、40，我们是 不知道任何方法可以有效地应用于 技术.目前的方法在很大程度上是临时性的， 一个人类网络管理员即使在单一技术网络中 (e.g.以太网局域网），为一个网络开发的策略，不能 很容易推广到其他网络。 此外，内部变化率 一个网络使得网络管理员很难保持高的 足够的专业知识水平，以开发和维护有效的故障 管理战略。 可以推广的新技术， 需要跨技术应用，以确保网络可靠性， 有效方式 这项研究的长期目标是使尽可能多的网络自动化， 尽可能的管理。 在网络管理中，我们将首先关注 故障管理。 沿着这些路线，计划是制定方法， 对于（1）可以跨不同技术应用的故障管理， (2)可以从一个网络推广到另一个网络，以及（3）可以适应变化 网络中先前的研究12、13、14已经证明， 自适应统计技术可用于网络故障检测。 这些类型的技术使用网络测量来学习 网络的行为，因此可以推广。 我们的目标是 规划期的任务是确定故障管理中的一系列问题 可以用严格的、可推广的方法来解决。 故障管理包含一组庞大而复杂的问题， 还没有得到很好的研究和定义。 在计算方法之前， 必须找出需要解决的问题。 各种网络技术 将在故障管理方面进行研究，并提出一系列问题， 将提取所有或大多数技术的共同点。 为 每一个被确定的问题，使用自动化的可行性， 技术和推广将得到评估。 初步结果将 使用TCP/IP测试网络获得。 规划的结果 活动将是一个研究方向，是集中在一套可行的 这些问题在网络技术中广泛适用。 一个web 将为故障管理研究规划项目创建页面。 该网页将介绍活动和成果 得到了 网页的URL将是http://www.nml.csam.iit.edu/~planning/。

As computer communication networks evolve from offering best-effort service to offering real-time services with stringent Quality of Service (QoS) guarantees (e.g. video), the need for improved fault management techniques increases. Network fault management is an open problem that continues to increase in complexity. A major cause of the increase in complexity of this problem is the heterogeneity of networks. Networks of today are comprised of a variety of technologies (e.g. Wireless, ATM, Ethernet), that are expected to support a diverse set of networked applications (file transfer, WWW, video conferencing). The fault management problem has been studied in varying degrees for different technologies, but there are many open issues 29 , 40 , and we are unaware of any methods that can effectively be applied across technologies. Current methods are largely ad hoc and rely on the expertise of a human network manager. Even within single-technology networks (e.g. Ethernet LANs), strategies developed for one network, cannot be easily generalized to other networks. In addition, the rate of change within a network makes it difficult for the network manager to maintain a high enough level of expertise to develop and maintain effective fault management strategies. New techniques that can be generalized and applied across technologies are needed to ensure network reliability in an efficient manner. The long-term goal of this research is to automate as much of network management as possible. Within network management, we will first focus on fault management. Along these lines, the plan is to develop methods for fault management that (1) can be applied across different technologies, (2) can generalize from network to network, and (3) can adapt to changes in the network. Previous research 12 , 13 , 14 has demonstrated that adaptive statistical techniques can be used for network fault detection. These types of techniques use the network measur ements to learn the behavior of the network and can thus be generalized. The goal for this planning period is to identify a set of problems within fault management that can be addressed using rigorous, generalizable methods. Fault management encompasses a large, complex set of problems that have not been well studied or defined. Before methods are evaluated, the problems to be addressed must be identified. Each network technology will be studied in terms of fault management, and a set of issues that are common across all or most of the technologies will be extracted. For each of the problems that are identified, the feasibility of using automated techniques and generalization will be evaluated. Preliminary results will be obtained using the TCP/IP test network. The result of the planning activities will be a research direction that is focused on a set of feasible problems that are widely applicable across network technologies. A web page will be created for the fault management research planning project. The web page will contain a description of the activities and results obtained. The URL of the web page will be http://www.nml.csam.iit.edu/~planning/.