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We address the problem of estimating the real-time nature of traffic flows in data center networks, using the light-weight SNMP data. Unlike the problem of estimating the traffic matrix (TM) across origin-destination (OD) pairs in ISP networks, the traffic flows across servers or ToR (Top of Rack) switch pairs in data center networks are notoriously more irregular and volatile. Although numerous methods...
Overlay network monitoring is one of the most important issues in the design and operation of overlay networks. It faced with increasing demand for better throughput and response time performance. Given an overlay network with n end hosts, existing systems either require O (n2) measurements, and thus lack scalability, or can only estimate the latency but not failures or congestion. We propose a scalable...
As the wireless network scales up in size and complexity, the need to study the scalability and behaviors of these networks and their protocols becomes essential. Opportunistic routing utilizes broadcast nature of wireless network, and significantly increases the unicast throughput. However, all of the current opportunistic routing protocols have to rely on the whole topology information. This indeed...
Due to the increasing development of communication networks, higher network availability and reliability is required. Hence, fault management is becoming an important and difficult issue in dynamic network environment. In this paper, we mainly use active probing to perform fault detection and diagnosis tasks. Past research on probing-based monitoring technique provides a preplanned probing technique...
The modern society has come to rely heavily on IT services. To improve the quality of IT services it is important to quickly and accurately detect and diagnose their faults which are usually detected as disruption of a set of dependent logical services affected by the failed IT resources. The task, depending on observed symptoms and knowledge about IT services, is always disturbed by noises and dynamic...
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