IP Network Management Platforms Before the Web

In this paper, we analyze the characteristics and shortcomings of IP network management platforms before the arrival of Web technologies. In the first part, we give a brief history of IP network management, and summarize the limitations of traditional (i.e., pre-Web and SNMP-based) management platforms. We recall the initial objectives of open network management. We then explain how the early vision of generic management was changed by the industry`s natural inclination for market segmentation, and how the market of IP networks evolved from generic to vendor-specific equipment, management GUIs and MIBs. In the second part, we propose a simple model of traditional IP network management platforms, against which new Web-based management solutions can be compared. We introduce the three core functions of such platforms (network monitoring, data collection, and event handling), distinguish regular management from ad hoc management, and explain how SNMP`s polling model maps onto these functions

Management of networks that provide QoS guarantees

This paper presents the results of a case study to the feasibility of introducing ATM SVCs into the Dutch SURFnet research ATM network. The key issue that is examined are the implications of the Quality of Service support of ATM. QoS guarantees for a connection require a portion of the finite ATM network resource. Once all network resource is allocated to connections no new connections will be accepted, and users will start experiencing denial of service. The key research question here is if and how this denial of service probability can be kept to a minimum

Distributed Management of High-Layer Protocols and Network Services through a Programmable Agent-Based Architecture

This paper proposes an architecture for distributed man-agement of upper layer protocols and network services called Trace. Based on the IETF Script MIB, the architecture provides mechanisms for the delegation of management tasks to mid-level managers, which interact with monitoring and action agents to have them executed. The paper introduces PTSL (Protocol Trace Specification Language), a graph-ical/textual language created to allow network managers to specify proto-col traces. The specifications are used by mid-level managers to program the monitoring agents. Once programmed, these agents start to moni-tor the occurrence of the traces. The information obtained is analyzed by the mid-level managers, which may ask action agents for the execution of procedures (Perl scripts), making the automation of several management tasks possible

Major: Electronics and Communication Engineering

Today, information technology is strategically important to the goals and aspirations of the business enterprises, government and high-level education institutions – university. Universities are facing new challenges with the emerging global economy characterized by the importance of providing faster communication services and improving the productivity and effectiveness of individuals. New challenges such as provides an information network that supports the demands and diversification of university issues. A new network architecture, which is a set of design principles for build a network, is one of the pillar bases. It is the cornerstone that enables the university’s faculty, researchers, students, administrators, and staff to discover, learn, reach out, and serve society. This thesis focuses on the network architecture definitions and fundamental components. Three most important characteristics of high-quality architecture are that: it’s open network architecture; it’s service-oriented characteristics and is an IP network based on packets. There are four important components in the architecture, which are: Services and Network Management, Network Control, Core Switching and Edge Access. The theoretical contribution of this study is a reference model Architecture of University Campus Network that can be followed or adapted to build a robust yet flexible network that respond next generation requirements. The results found are relevant to provide an important complete reference guide to the process of building campus network which nowadays play a very important role. Respectively, the research gives university networks a structured modular model that is reliable, robust and can easily grow

Implementação de um discriminador de repasse de eventos para o ambiente SNMP

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Gradução em Ciência da Computação.Esta dissertação apresenta um modelo e um protótipo, a serem utilizados em ambientes SNMP, os quais implementam as funcionalidades de Objetos Discriminadores de Repasse de Eventos, definidos para ambientes OSI na norma X-734. Esta aplicação, além de possibilitar a utilização de mais de uma estação de gerenciamento divididas tanto em módulos de gerenciamento quanto em áreas de atuação, também torna possível enfatizar o modelo na recepção de Traps. Desta forma, o modelo assume uma importante característica, a descentralização. Apresenta também os resultados dos testes efetuados para avaliação e validação do protótipo e do modelo apresentado, assim como os ambientes onde foram realizados os testes

Standards as interdependent artifacts : the case of the Internet

Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2008.Includes bibliographical references.This thesis has explored a new idea: viewing standards as interdependent artifacts and studying them with network analysis tools. Using the set of Internet standards as an example, the research of this thesis includes the citation network, the author affiliation network, and the co-author network of the Internet standards over the period of 1989 to 2004. The major network analysis tools used include cohesive subgroup decomposition (the algorithm by Newman and Girvan is used), regular equivalence class decomposition (the REGE algorithm and the method developed in this thesis is used), nodal prestige and acquaintance (both calculated from Kleinberg's technique), and some social network analysis tools. Qualitative analyses of the historical and technical context of the standards as well as statistical analyses of various kinds are also used in this research. A major finding of this thesis is that for the understanding of the Internet, it is beneficial to consider its standards as interdependent artifacts. Because the basic mission of the Internet (i.e. to be an interoperable system that enables various services and applications) is enabled, not by one or a few, but by a great number of standards developed upon each other, to study the standards only as stand-alone specifications cannot really produce meaningful understandings about a workable system. Therefore, the general approaches and methodologies introduced in this thesis which we label a systems approach is a necessary addition to the existing approaches. A key finding of this thesis is that the citation network of the Internet standards can be decomposed into functionally coherent subgroups by using the Newman-Girvan algorithm.(cont.) This result shows that the (normative) citations among the standards can meaningfully be used to help us better manage and monitor the standards system. The results in this thesis indicate that organizing the developing efforts of the Internet standards into (now) 121 Working Groups was done in a manner reasonably consistent with achieving a modular (and thus more evolvable) standards system. A second decomposition of the standards network was achieved by employing the REGE algorithm together with a new method developed in this thesis (see the Appendix) for identifying regular equivalence classes. Five meaningful subgroups of the Internet standards were identified, and each of them occupies a specific position and plays a specific role in the network. The five positions are reflected in the names we have assigned to them: the Foundations, the Established, the Transients, the Newcomers, and the Stand-alones. The life cycle among these positions was uncovered and is one of the insights that the systems approach on this standard system gives relative to the evolution of the overall standards system. Another insight concerning evolution of the standard system is the development of a predictive model for promotion of standards to a new status (i.e. Proposed, Draft and Internet Standards as the three ascending statuses). This model also has practical potential to managers of standards setting organizations and to firms (and individuals) interested in efficiently participating in standards setting processes. The model prediction is based on assessing the implicit social influence of the standards (based upon the social network metric, betweenness centrality, of the standards' authors) and the apparent importance of the standard to the network (based upon calculating the standard's prestige from the citation network).(cont.) A deeper understanding of the factors that go into this model was also developed through the analysis of the factors that can predict increased prestige over time for a standard. The overall systems approach and the tools developed and demonstrated in this thesis for the study of the Internet standards can be applied to other standards systems. Application (and extension) to the World Wide Web, electric power system, mobile communication, and others would we believe lead to important improvements in our practical and scholarly understanding of these systems.by Mo-Han Hsieh.Ph.D

Implementação de um software discriminador de repasse de eventos para a arquitetura internet

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação.Este trabalho apresenta um Software Discriminador deRepasse de Eventos (SDRE) construído em Java, aplicando as funcionalidades do modelo OSI em ambientes SNMP. É feita uma revisão bibliográfica das duas arquiteturas de gerência de redes, buscando adequar a norma OSI/ITU-T X-734 à Internet e são apresentadas motivações que demonstram esforços atuais nesta área. Esta aplicação é simples e funcional, enfatizando a técnica de relatório de eventos, filtrando os mesmos e podendo selecionar várias estações de gerenciamento destinatárias, como forma de descentralizar e melhorar o desempenho da arquitetura de gerência de redes Internet. Por fim são apresentados os resultados dos testes efetuados, a avaliação e a validação do software, bem como o ambiente simulado e de produção onde foi implantado o discriminador