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Supporting guaranteed QoS is a significant issue in packet transport networks. Since various services require their own quality of service, flow-based traffic management that properly controls network resources when traffic congestion occurs is required for network nodes. In this paper, we propose an integrated flow management scheme to support guaranteed QoS in packet transport systems that comprise...
Most datacenter networks are based on specialized edge-core topologies, which are costly to build, difficult to maintain and consume too much power. We propose enhancements to layer-two (L2) Ethernet switches to enable multipath L2 routing in scalable datacenters. This replaces an expensive router with commodity switches. Our hash-based routing approach reuses and minimally extends hardware structures...
The resource reservation capabilities offered by modern wide area networks, such as ESnet and Internet2, create a new network utilization model that coexists but drastically differs from the standard best-effort network paradigm. These capabilities enable the dedication of network resources to specific users/applications that may suffer from interruptions and other adverse effects because of the default...
Today, data center networks that scale to tens of thousands of ports require the use of highly-specialized ASICs, with correspondingly high development costs. Simultaneously, these networks also face significant performance and management limitations. Just as commodity processors and disks now form the basis of computing and storage in the data center, we argue that there is an opportunity to leverage...
In this paper we describe our experience with integrating a distributed policy-based management system (DRAMA) with an open-source network management system (OpenNMS). Network operations seeking the benefits of policy-based network management often have pre-existing network monitoring systems. While these pre-existing systems are capable of monitoring the network, they are limited in their: 1) ability...
This paper proposes a novel dynamic bandwidth allocation method based on a new switch technology named Ethernet-oriented physical frame timeslot switching (EPFTS). Based on the features of EPFTS, the bandwidth allocation is changed to quota allocation for manageable quality of service (QoS). The proposed method is composed of a quota allocation strategy and a dynamic quota scheduling policy called...
Switched Ethernet networks are spreading to industrial environments more are more. The current trend is using them at all levels of a factory, replacing this way field-buses and other industrial networks. Switched Ethernet lacks the drawback of the non-deterministic collision resolution of coax cabling. However there are still some sources of indeterminism, mostly due to contention problems in message...
We present a novel approach for the measurement and estimation of network traffic utilization between network nodes in heterogeneous environment. We propose an enhanced equation to evaluate the performance of network interface via little law and queuing theories to improve the evaluation algorithm. To get accuracy results on the performance of simulation model, we verify and validate data from local...
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