The first is the long time need to analyze the monitoring data and the second is the high cost of monitoring.Įach monitoring set gathers and presents monitoring data to the network operator, who identifies the location or cause of failure by analyzing the data. Because monitoring is performed at many sites and layers in the network as suggested above, there are two issues. Wide-area deployment of the monitoring system enables us to evaluate the service stability more reliably because the network quality indicators such as delay and jitter can be determined. In order to identify where packet loss occurs or where the jitter characteristics are deteriorating, it is important that the monitoring system cover the entire service area and grasp overall network quality. Recently several domain networks in different parts of the world have been connected and streaming services are being provided through them. This monitoring system was designed to reduce the time taken from fault detection to cause analysis and reducing system-wide cost. This paper proposes an adaptive network monitoring system, which changes monitoring location and layer dynamically at runtime and can watch multiple domains and multiple layers as necessary. Is expensive to install monitoring sets in multiple locations because each set needs a high-end CPU and large memory. However, in such monitoring, it takes too long to analyze network performance because multiples sets of data, each of which is very large, must be gathered. In order to ensure adequate service quality, monitoring should be conducted across multiple domains and multiple layers to grasp the details of overall network performance and troubleshoot network trouble as rapidly as possible. In addition, in order to monitor each packet in a 10-Gbps network, network monitoring must have the resolution of micro or sub- micro second. The network operator must monitor the network in detail such as delay, inter-packet gap and jitter for this reason. For example, delay varies significantly and traffic is bursty, packet loss maybe caused by buffer overflow of a switch somewhere in the network. In addition, monitoring across multiple layers, such as application layer and network layer, the network operator can understand the relationship between service quality and the possible causes of trouble. By implementing monitoring across multiple domains, networks in different locations administered by different organizations, the network operator identifies troubles more easily. In order to hold QoE acceptable, monitoring should be conducted across multiple domain and multiple layers to grasp the details of overall network performance and troubleshoot any network troubles discovered. In the real time streaming service, when packet loss or reorder occurs, the video is distorted or stopped which degrades the QoE (Quality of Experience). When failures, unacceptably slow response, or other unexpected behavior is detected, these systems send additional messages called alerts to designated locations to notify system administrators. It will often send messages over the network to each host to verify it is responsive to requests. It normally measures the processor (CPU) utilization of hosts, the network bandwidth utilization of links, and other aspects of operation. A network monitoring system is capable of detecting and reporting failures of devices or connections. It is a subset of the functions involved in network management. Network monitoring describes the use of a system that constantly monitors a computer network for slow or failing components and that notifies the network administrator in case of outages. I hope this paper will enable people working on computer networks to choose appropriate network monitoring system to meet their goals. This paper surveys all possible networks monitoring system in multi-domain networks. To realize faster analysis and lower cost, this paper proposes an adaptive monitoring system which troubleshoots service troubles automatically by creating and running monitoring scenarios it can reconfigure the monitoring equipment and program dynamically at runtime. Furthermore, it is expensive to install the monitoring equipment in multiple locations. However, when conducting monitoring, it takes too long to analyze the monitoring data because the monitoring system gathers massive sets of data from multiple locations. Monitoring must be conducted across domains and layers to fully grasp the details of overall network performance. Adaptive Network Monitoring System in Multi-Domain Networksĭepartment of Computer Science and Engineering Calicut University,India
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