Jong-Tae Park

Web-based intranet services and network management

Intranets are composed of a network of various devices, systems, and services supporting a wide variety of applications within an organization. Providing a secure, reliable, and efficient operating environment to support the organizations daily activities and its business is the most challenging task faced by operations and management staff today. Current management practices typically involve the use of separate, incompatible tools and techniques for managing networks, systems, and applications. What is needed desperately is a simple, uniform framework for managing not only networks but also systems and applications. Web-based management is a promising approach that can provide a truly integrated management solution. This article examines the key emerging technologies involved in Web-based management. The authors present an integrated architecture that can be used to manage all the networking and computing resources in an Intranet. Also presented are several specific examples where Web technology has been applied in managing different target resources for validating the architecture.

Web-based customer network management

This paper presents a framework for managing customer networks using the Web technology. This framework extends the current Web technology which is being used for transferring various information on the Internet to those which can be used to transfer management requests and replies as well as traps and event notifications. A Web browser is used as a universal user interface for monitoring and controlling the activities of the networks. Using this framework, we have developed an integrated customer network management system which can manage SNMP-enabled or CMIP-enabled network devices. We also applied the CORBA technology to accommodate both SNMP and CMIP protocols. The details of our prototype implementation are also presented.

A CORBA-based quality of service management framework for distributed multimedia services and applications

For distributed multimedia services, it is essential that quality of service be guaranteed system-wide, including end systems, communication systems, and networks. Although many researchers have addressed issues of QoS management, little attention has so far been paid to the QoS management services in distributed multimedia services and applications. To address this deficiency, we have designed a layered model for end-to-end QoS management called the QoS management framework. Our framework, which is CORBA-based, includes a generic QoS MIB for the QoS parameterization of various multimedia services and the services needed to perform various QoS functions. A key component of this framework is the QoS management service object (QMSO), which orchestrates resources at endpoints, coordinating resource management across layer boundaries. Services such as translation, monitoring, admission, and negotiation are provided by the QMSO. To validate this concept, we have developed a QoS management system for managing and controlling the QoS of a distributed multimedia system called MAESTRO. The QoS management system has been implemented through CORBA objects and provides an interface to multimedia applications, which can be dynamic negotiation and renegotiation of QoS by users. Some performance results in QoS negotiation and renegotiation are also presented.

Managing the New Telecommunications Paradigms: AReport on APNOMS'98

APNOMS’ 98, Asia-Paci® c Network Operations and Management Symposium, was held September 16±18, 1998 in Sendai, Japan. This symposium, which follows the very ® rst and successful APNOMS’ 97 [1] held in Seoul, Korea in October 1997, was attended by more than 260 researchers, developers, service providers, and vendors from 10 countries around the world. The theme of this three-day symposium was a Managing the New Telecommunications Paradigms.o Today, rapid progress of technologies and sophisticated customer requirements are driving telecommunication world into new paradigms, where computer and telecommunication technologies are merged, and new competitive services are furnished through multiple service providers, vendors, and heterogeneous network environments. In today’ s globally competitive market, telecommunication industries are facing the challenge to realize end-to-end services which are faster, cheaper, and more reliable. Network operations and management is essential to achieve end-to-end ow-through services by managing and unifying different service providers’ services/networks and multi-vendors’ network elements, and have become key enablers for business success as well as customer satisfaction. On the ® rst day of the symposium, the APNOMS’ 98 participants enjoyed six tutorials on the hottest topics in the area of network operations and management. Jock Embry (Opening Technologies, USA) gave a tutorial on a Designing Managed Objects with GDMO.o Kazunori Ishikawa (NTT, Japan) gave a tutorial on a Operation Technologies of Next-Generation Communication Switching Systems.o James Won-Ki Hong (POSTECH, Korea) gave a tutorial on a Web-based Network and Systems Management.o Salah Aidarous (NEC America, USA) gave a tutorial on a Integrated Network Management: the Reality and Expectations.o

Enterprise Network Traffic Monitoring, Analysis, and Reporting Using Web Technology

Todays enterprise networks are composed of multiple types of interconnected networks. Furthermore, organizations use a variety of systems and applications on these networks. Operations and management staff must provide an efficient, reliable and secure operating environment to support an organizations daily activities. Enterprise networks must be monitored for performance, configuration, security, accounting and fault management. Current management practices typically involve the use of complex, hard-to-learn and hard-to-use tools. What is needed desperately is a set of simple, uniform, ubiquitous tools for managing networks. Web-based management promises to provide such solutions. This paper focuses on the use of Web technology and the Multi-Router Traffic Grapher (MRTG) for the purposes of enterprise network traffic monitoring and reporting. In this paper, we first examine the requirements for enterprise network traffic monitoring, analysis and reporting, and then present the design and implementation of a Web-based network traffic monitoring and reporting system that satisfies those requirements. We also present guidelines we have formulated and used for analyzing enterprise network traffic. We then discuss our experiences in using such a system for traffic monitoring on two large enterprise networks.

Design and implementation of a CORBA-based TMN SMK system

In a telecommunication management network (TMN), the interworking of manager and agent needs to exchange and process management information which is defined as the shared management knowledge (SMK) in the ITU-T Recommendation M.3010. The SMK includes information on the protocol knowledge, management functions, managed object classes and their instances and authorized capabilities. We examine in detail the design issues in developing an SMK system for supporting management systems. We present a design of a CORBA-based SMK system including the procedures of obtaining the SMK information from the management information base (MIB) and of the SMK context negotiations. Finally, our effort on the prototype implementation of an SMK system using ORBeline and OSIMIS is presented.

End-to-end Internet/intranet service management in multi-domain environment using SLA concept

This paper presents a multi-domain Internet service management framework that uses service level agreement (SLA) to support QoS and to exchange management information across domain boundaries.

ATM customer network management using WWW and CORBA technologies

In this paper, we present a framework for managing ATM customer networks using WWW and CORBA technologies. The WWW technology may provide network management operators with platform independence, location independence, friendly and/or consistent management behavior as well as secure management operations. The main problems in a Web-based network management system may include limited management capabilities of HTTP operations and lack of supporting mechanisms for trap or event notifications. These problems are, in this paper, solved by the integration of Java and CORBA technologies. We extend the current Web technology which is being used for transferring various information on Internet to those which can be used to transfer management requests and replies as well as event notifications. A Web browser is used as a universal user interface for monitoring and controlling the activities of the ATM customer networks. We have developed an integrated customer network management system which can manage SNMP-enabled or CMIP-enabled network devices and provide ATM CNM services. In particular, we applied the CORBA technology to accommodate several management protocols such as SNMP, CMIP and other management protocols. Through the CORBA IDL-to-Java mapping, complex management operations as well as event notifications are supported without modification of the current WWW systems.

Design and Implementation of TMN SMK System UsingCORBA ORB

In Telecommunications Management Network (TMN),the interworking of manager and agent requires thesharing of management information defined as SharedManagement Knowledge (SMK) in ITU-T Recommendation M.3010. SMK includes information on theprotocol knowledge, management functions, managed objectclasses and their instances, and authorizationcapabilities. We have developed a CORBA-based TMN SMKsystem in order to provide a dynamic and efficientdistributed processing environment for the exchange ofmanagement information between managers and agents. Inthis paper, we discuss the design issues and present the design of a CORBA-based SMK systemincluding the access protocol for obtaining the SMKinformation from MIB and for SMK context negotiations.Also, our effort on the prototype implementation of anSMK system using ORBeline and OSIMIS is presented.The preliminary performance results of our prototypeimplementation show that ORB-based SMK informationaccess outperforms CMIS-based SMK information access, and that our approach is an efficient way ofexchanging SMK information.

Supporting distributed management in a telecommunications management network (TMN) environment

As telecommunications networks and services are getting larger and more complex, telecommunication service providers around the world are desperately looking for solutions to manage and control them. A telecommunications management network (TMN) has been envisioned to provide a framework for the operation, administration, maintenance and provisioning (OAM&P) of telecommunications networks and services in todays open, multi-vendor environment. Due to the inherent distributed nature of managing systems and managed systems, supporting distributed processing is an essential requirement in TMN. This paper examines the general requirements for supporting distributed processing for the purpose of open distributed management in TMN and proposes a solution which is based on the integrated use of two distributed processing technologies: the X.500 Directory Service and the ODP (Open Distributed Processing) Trader.