Victoria C. Daskalou

Temporal network management model

Networks grow in scale and become more complex and heterogeneous as well. A lot of research effort is focused on the topic of network management. This is because nowadays a network management system is a vital component of any network installation. In this paper, we propose an extended network management information model that includes the time dimension. This view leads us to adopt a temporal data model as the underlying information model. Moreover, the services provided by this model, as well as the architecture supporting them, are presented. In addition to that, we have implemented a prototype incorporating the proposed network management view. The description of the prototype is also presented in this paper.

A model for SNMP based performance management services

This paper presents an SNMP-based management framework that can be used to monitor and control the performance of resources in a TCP/IP network. For the monitoring of diachronic network performance a set of indicators related to the host interfaces and to the TCP/IP implementation are defined. The layered architecture of the network management application and the performance services provided by each layer are also described. Moreover, an approach for collecting and efficiently storing the management information in a database, is proposed. The database schema reflects the MIB structure and includes time information as well. Finally, a brief description of the prototype that implements the proposed management concept is included in this paper.

Managing the network state evolution over time using CORBA environment

This paper proposes a CORBA-based framework for managing the network state evolution over time. This framework is based on the concept of CORBA temporal agents, capable of managing the past and current behavior of network resources. Managed objects use specific time attributes for representing how their values are evolving in time. Moreover, specially designed operations (services) enable users to exploit the temporal dimension of management information in order to understand the past, control the present, and thus even predict the future of managed objects. The management environment is designed in order to provide coexistence and interoperability with existing management platforms.

Network management services using a temporal information model

In this paper we address the issue of time as an attribute of the network management information. More precisely, we incorporate the temporal dimension in the management information model proposed by the Internet Engineering Task Force (IETF), as it is described by SMI. The core of the proposed network management information model is the Temporal Management Information Base (TMIB), a conceptual representation of the diachronic behaviour of network resources. We define the architecture as well as the services supporting our view. Finally, we give the exact definition of one key service using ASN. 1 formulation.

On the implementation of a prototype for performance management services

This paper presents a prototype for management services which enables the performance monitoring and control of resources in a TCP/IP network. A time reference information model required to accomplish the different needs of performance management functions, is also described. This temporal model can be used not only to provide a diachronic view of the management information, but also to define a set of measures needed to observe the performance of network elements. The performance management application is implemented using a distributed architecture. It provides facilities to dynamically create aggregate managed objects, to collect the management information and to store the collected data in a database. The database schema is designed to follow the proposed time reference information model and also the structure of the MIB. Finally, the architecture of the prototype and the supported facilities are also illustrated in this paper.

The role of the time parameter in a network security management model

We propose an information model and a number of services for managing the security of TCP/IP networks. More precisely, we identify a number of managed objects included in SNMP management information base (MIBs) that are important for security management and we propose a temporal network management model for the historical representation of the security management information. This model incorporates the temporal dimension in the management information model proposed by the Internet Engineering Task Force. Moreover, we define a number of services for the monitoring, storage, capitalisation and analysis of the historical security management information.

Temporal Network Management Information Model andServices

The paper addresses the issue of time as anattribute of the network management information. Thetemporal dimension is incorporated in the managementinformation model proposed by the Internet Engineering Task Force (IETF), as it is described by theStructure of Management Information (SMI). The core ofthe proposed network management information model is theTemporal Management Information Base (TMIB), a conceptual representation of the diachronicbehavior of network resources. The temporal networkmodel also includes the definition of a specificarchitecture and a number of temporal services. Theexistence of such services facilitates the development oftime-reference applications in different functionalareas.

SNMP-based network security management using a temporal database approach

Every day, all over the world, computer networks and hosts are broken into. The network manager has to establish specific network security mechanisms such as authentication, encryption, authorization, access control, firewalls, etc. in order to protect the network resources against security threats. But, since network security mechanisms are not impermeable, the network manager has to establish also procedures for continuously monitoring the network security. In this paper we propose a network management system which enables the monitoring and control of security in TCP/IP networks. The system admits the real-time monitoring of security management information by using the SNMP protocol. Moreover, the system includes facilities for collecting and efficiently storing historical security management information in a temporal database for off-line analysis. Finally, the adopted two level hierarchical network management architecture and the model for the security temporal management information base are also described in this paper.