Showing papers on "Network management published in 1991"

Network management control

Abstract: A Network Management Control System for a multi-space building having individual space heating and cooling units in each space that ties the individual heating and cooling units together with a central computer which allows the remote computer to interrogate and overwrite parameters set at each local heating and cooling unit.

Dynamic translation of network management primitives to queries to a database

Abstract: A technique for dynamically translating network management primitives into operations on management information stored within a relational database hosting a management information base. A CMIP network management operation and argument is retrieved from a network management processing machine and processed by a full or partial OSI stack. The CMIP operation is examined to ascertain a type of network management operation. If the operation is of a type which interacts with the database, a database query is generated in accordance with the operation type, to perform the network management operation on the relational database.

Managing communication networks by monitoring databases

Abstract: The problem of managing large communication networks using statistical tests, alerts, and correlation among alerts is considered. The authors propose a model of these network management functions as data-manipulation operations. They argue that this approach can improve the flexibility of network management systems by providing a language that is declarative and set-oriented. These are properties of existing data-manipulation languages and it is shown that any data-manipulation language, augmented with several new capabilities, can serve as a language for specifying the aforementioned network management functions. The new capabilities required are specification of events, correlation among events, and change-tracking. >

Communication system concentrator configurable to different access methods

Abstract: A local net area network, or LAN, configuration is provided with a multiple generic LAN channel architecture which can be logically and dynamically changed. The configuration control can be applied to each module of the network and to each port of a module of a LAN hub. The architecture provides multiple LAN protocols to be used simultaneously, as needed, through protocol specific functions. Industry standard protocol such as: token bus, token ring, and fiber distributed data interface (FDDI), can be implemented using the generic channel architecture and its characteristics providing respective network functions. The architecture also provides a digital collision detection method and provides information necessary for precise network statistics monitoring. The token passing ring architecture provides a logical ring formation within the generic channel. A token passing bus architecture uses modified Ethernet™ architecture, and a hub management provides control for the generic multichannel and the LAN management provides protocol dependent network management. The architecture provided allows multiple hub management entities via hub mastership arbitration to provide a unique master for the hub management function.

NETMATE: A network management environment

Abstract: A description is given of the Network Management Analysis and Testing Environment (NETMATE) project, the prime goal of which is to develop a unified and comprehensive software environment for network management to oversee and orchestrate the operations of diverse devices and protocols in large, heterogeneous computer networks. The overall NETMATE architecture is discussed, and the network management functions performed by each component are described. The problem of network modeling and the NETMATE approach to it are presented. The current implementation status of NETMATE is given, and some conclusions are offered. >

The simple book : an introduction to management of TCP/IP-based internets

Abstract: This text provides a straightforward view of the important topics in contemporary inter-networking - network management and the Simple Network Management Protocol (SNMP).

Telecommunications technology handbook

Abstract: The telecommunications environment standards setting bodies for telecommunications digital transmission systems ISDN and BISDN transmission media and radio services satellite and microwave transmission media fibre optics infrared technology switching and signaling systems private branch exchanges data communications architectures and issue for the 1990s channel-to-channel computer communications data communication standards local area networks and their management network management standards and issues network security and the evolving international standards.

Network device information exchange

Abstract: A network has a plurality of devices connected together in pairs. When a physical connection between a pair of devices is initiated, the devices exchange information regarding a unique device identifier, and details of the physical connection. This information is provided in a report to a network manager. When a failure occurs on the network, the connection information is used to locate the failure.

OSPF Version 2 Management Information Base

Abstract: This memo defines an experimental portion of the Management Information Base (MIB) for use with network management protocols in TCP/IP-based internets. In particular, it defines objects for managing OSPF Version 2.

Desktop multimedia communications-breaking the chains

Abstract: It is noted that desktop multimedia is achievable today only if it is confined to a single personal computer using direct connections to laser disks, CD-ROMS, and other multimedia data sources. It is suggested that, in order to make multimedia data and services available to individuals connected via local and wide-area networks, special operating system hardware and software are needed. Special network management and services will be required to support bandwidth allocation, time (latency and synchronization) control, and data format conversion. The large bandwidths and real-time characteristics of multimedia affect network requirements. In addition, support in operating system software, dedicated hardware, application interfaces, and new internal buses are required to extend media off of the desktop and into the network. >

Integrated network management for real-time operations

Abstract: An approach to integrated network management that eliminates the need for interface protocol conformance and provides applications that seamlessly isolate and resolve faults in the entire network is described. The approach uses off-the-shelf artificial intelligence tools and open-architecture client/server workstation technology. A sophisticated tool similar to a fourth-generation language, called the Universal Device Interface Generator, is used to develop and support agent interface modules very quickly and easily. This tool is used to provide a manager of managers, called the ALLINK Operations Coordinator (AOC), that can interface to virtually any existing element management system. With the AOC, information from all of the subnetwork managers is gathered and correlated, the results of this correlation are presented to the human operators in a uniform fashion, and any other interactions between the subnetwork managers and the human operators are also performed in a uniform fashion. >

Evaluating input/output relationships in a regional research network using co-word analysis

Abstract: In this study, a network management approach to science policy decision-making guided our efforts to develop new co-word analysis techniques for the evaluation of regional research policies. A rich collection of factual data was gathered on inputs into the local research system (funding, personnel, equipment, ...). This data was then combined with the results of a coword analysis of the region's publication output. The network management approach is useful in helping to determine the nature of input/output relationships in a regional context.

An implementation of the Common Network Management Information Service Element interfaces

Abstract: The implementation of the Common Network Management Information Service Element (CMISE) interfaces and how they interact with the other protocol layers are investigated. The aim of the work described was to develop a network management system to monitor, analyze, and manage the interactions between a network agent connected to an open systems interconnection (OSI) network and the OSI resources that are used by the agent. An overview of the International Standards Organization Network Management Framework is followed by a discussion of the experimental system used, the Management Specific Application Service Elements (MSASE) services, CMISE service primitives, CMISE protocol functions used by the network manager system, the ACMISE (Agent CMISE) protocol used to respond to the remote operations requested by the CMISE services, interfaces devised for the network manager system, and examples of the usage of the network manager commands with their associated responses. It is concluded that the bulk of the intelligence associated with subnetwork management can be in the MSASE and the CMISE. >

Distributed intelligent network management for the SDI ground network

Abstract: The authors describe an integrated solution to distributed intelligent network management for the Strategic Defense System (SDS) terrestrial network which emphasizes the partitioning of the problem between rule-based, constraint-based, and algorithmic techniques. Problems in current approaches to network management for the SDS are described which show how this new approach leads to an efficient implementation in a C-based environment via the Harris-developed constraint propagation expert system shell and the C language integrated production system shell. The advantages of constraint-based distributed problem solving are presented. The authors describe how a model of battle management and the evolving battle situation can be used to perform proactive as well as reactive definition of routes, and other network functions. >

Using SNMP to manage networks

Abstract: The simple network management protocol (SNMP) was created in the late eighties to solve a problem-management of the Internet, a very large distribution network based on TCP/IP protocols. SNMP was originally defined by the Internet Activities Board (IAB) in an RFC (Request for Comment) document. It is a simple protocol RFC 1067 defined five PDU formats designed to be carried by a connectionless datagram protocol, usually, but not necessarily, UDP. SNMP functionality can be split into two parts-the protocol and the MIBs (Management Information Bases). There is a third element-the user interface. However, that is strictly implemented specific, and not defined by an RFC. The author discusses message types; MIB; management systems; SNMP versus CMIP; improvements in SNMP performance; presentation improvements; and the benefits of SNMP.

Peer-to-peer network management in an IBM SNA network

Abstract: Management of IBM's Systems Network Architecture (SNA) peer-to-peer communication, called low-entry networking (LEN), is discussed. Prior to LEN, all host communications were hierarchical. LEN allows nodes like personal computers, AS400, and host applications to communicate with each other through the subarea network as peers. LEN nodes allow cooperative processing, initiate parallel and multiple sessions simultaneously, require less predefinition, and use a common LU6.2 interface. The management problems posed by decentralized processing, changes to management definitions, and dynamic session initiation are addressed. Research conducted in the The Travelers' network to determine impacts in the areas of installation, session management, problem determination, accounting and performance is reported. >

Extensions to the generic-interface MIB

Abstract: This memo defines an experimental portion of the Management Information Base (MIB) for use with network management protocols in TCP/IP-based internets. In particular, it defines managed object types as experimental extensions to the generic interfaces structure of MIB-II.

Techniques for managing asynchronously generated alerts

Abstract: This RFC explores mechanisms to prevent a remotely managed entity from burdening a manager or network with an unexpected amount of network management information, and to ensure delivery of "important" information. The focus is on controlling the flow of asynchronously generated information, and not how the information is generated.

An architecture for real-time control of broadband networks

Abstract: An architecture capable of supporting real-time traffic monitoring and control, management, and information transport for broadband networks is outlined. It embeds the management, the traffic control, and the information transport architectures. The traffic control architecture (TCA) is characterized both as a resource manager and an extended machine. The traffic control model employed consists of a statistical and a dynamic database and a set of distributed algorithms that interact by writing and reading into these databases. The latter are part of a knowledge database capable of supporting monitoring, control, and fault management tasks. The associated tasks operate on two time scales: a fast time scale with reaction times to events on the order of milliseconds and a slow time scale where actions in response to events take place within seconds. The TCA and the information transport architecture run on the fast time scale whereas the management architecture runs on the slow time scale. >

Network management and traffic analysis for CICNet

Abstract: Some network management mechanisms for TCP/IP router-based networks are outlined, and the traffic management activities offered in support of the Committee on Institutional Cooperation Network (CICNet) are examined. An overview is given of CICNet, and its topology and network operations activities are described. The traffic engineering and management system developed at AT&T Bell Laboratories for the support of TCP/IP-based LAN interconnection networks is then described in detail. Future directions and capabilities are briefly considered. >

A survey of research and standards in high‐speed networks

Abstract: This paper surveys research and standards in high-speed networks. It first classifies high-speed networks according to the area of coverage. Secondly, it discusses the switches. Then, it examines network management protocols: media access control, routeing, flow control and error control. Finally, it investigates current hig-speed network standards: DQDB, FDDI, ATM, and SONET.

Automated network troubleshooting knowledge acquisition

Abstract: Troubleshooting knowledge acquisition is a notorious network maintenance expert systems development bottleneck. We present an improved methodology to generate automatically a skeleton of network troubleshooting knowledge base given the data about network topology, test costs, and network component failure likelihood. Our methodology uses AO* search where a suitable modification of the Huffman code procedure is found to be an admissible heuristic. Our heuristic uses synergistically information about both component failure rates and test costs while relaxing topology constraints. The resulting expert system (XTAR) minimizes expected troubleshooting cost faster and learns better troubleshooting techniques during its operation.

OSI internet management: Management Information Base

Abstract: This RFC documents a MIB for use with CMIP, either over pure OSI stacks or with the CMIP over TCP specification. It redefines objects comprised by the second revision of the Management Information Base for Network Management of TCP/IP-based internets: MIB-II so as to conform to the OSI structure of management information. This document is a product of the IETF OIM working group.

Network management using database discovery tools

Abstract: As the volume of network traffic increases due to the proliferation of distributed systems and the growth of real-time applications, a good understanding of traffic distribution and patterns becomes critical in network control and performance management. The authors upgrade the facilities of network management from traditional file systems to database and knowledge base systems and apply machine learning techniques to discover traffic patterns which are difficult to discern by human operators among a large volume of measurements. An experiment on interconnected LANs is conducted where some interesting patterns are found. The results show a strong traffic locality and some cyclic traffic patterns. The discovered rule base can describe the traffic distribution and patterns which need to be captured for any sophisticated performance management. The experiment has shown the high applicability of induction techniques to network management. >

Network management method using redundant distributed control processors

Abstract: A distributed network management system for managing redundant global network control points. The network management system allows candidate control points to determine which is primary and which are alternates, initializes the primary and alternate control points, synchronizes global data, and manages client interaction with the control points. The control points negotiate primary status by establishing a named resource in each processor and by testing for the lowest network address in each active processor. In addition, each client workstation determines which of the candidate control points is primary by interrogation. Client processes detect primary control point failures and switch the alternate control point to primary status.

Clustering schemes for network management

Abstract: A communication network management structure is considered which consists of regional management centers. These centers receive fault reports from individual nodes in their region and take appropriate action based on the information gathered. The regional centers may report their information to a central management center if required. The problem of partitioning a network into a given number of regions (or clusters) is considered such that there is one management center assigned to each region and the total distance all the nodes to their assigned center is minimized. An efficient algorithm to solve this problem is presented. It is shown that the problem becomes NP-complete when there are two management centers per region with the regions being disjoint. Some heuristic solutions to this problem are also presented. >

Photonic access network architecture

Abstract: A photonic access network architecture is proposed that can create the large capacity and extremely flexible network needed to offer B-ISDN (broadband integrated services digital network) services economically. The networks are characterized by increased management flexibility and line capacity. Line capacity of over 100 Gb/s is possible with a single-mode fiber. This architecture uses WDM (wavelength division multiplexing), FDM (frequency division multiplexing), and optical switching techniques to keep pace with service and demand growth. A wavelength division optical switch is proposed that permits the establishment of this architecture. The switch is composed of Mach-Zehnder interferometers with a thermooptic phase shifter. By using LSI microfabrication technology, a switch that supports eight wavelength signals can be constructed on one silicon wafer. >

Analysis of automatic network management controls

Abstract: The performance response of circuit-switched networks with stored program control exchanges is analyzed under nonstationary traffic conditions. Models of real time traffic measurements and dynamic flows in such networks are developed. A framework for analysis and design of state-dependent routing and flow control algorithms is provided based on concepts of various traffic measurements and different patterns of traffic nonhomogeneity. It is indicated that global performance objectives can be obtained by means of the state-dependent shortest route algorithms. Issues relevant to an implementation of different traffic control techniques are discussed. An example routing scheme is introduced and compared with known procedures. >

Management of corporate communication networks in the OSI environment

Abstract: A description is presented of the requirements, architecture, and enabling technologies for the development of intelligent and integrated corporate network management systems. A report is presented on progress with applying the described concepts to the integrated management of large data communication networks. The analysis of network management technologies emphasizes the need for marrying object-oriented and knowledge-based technologies with the emerging network management standards. The benefits of adopting these technologies include the development of modular and extensible designs, intelligent applications, and familiar user interfaces. >