BRUSCHI , Roberto

The concept of energy-efficient networking has begun to spread in the past few years, gaining increasing popularity. Besides the widespread sensitivity to ecological issues, such interest also stems from economic needs, since both energy costs and electrical requirements of telcos' and Internet Service Providers' (ISPs) infrastructures around...

Recent technological advances provide an excellent opportunity to achieve truly effective results in the field of open Internet devices based on PC COTS Hardware, also known as Open Routers. In this environment, new interesting research topics, like parallel computing optimization, are related to the rapid migration of CPU architectures to the...

In this paper, we consider energy-aware network devices (e.g. routers, switches, etc.) able to trade their energy consumption for packet forwarding performance by means of both low power idle and adaptive rate schemes. We focus on state-of-the-art packet processing engines, which generally represent the most energy-starving components of...

In this paper, our main objective is to explore how Linux Software Routers (SRs) can deploy advanced and flexible paradigms for supporting novel control-plane functionalities and applications. To this end, we investigate and study a new open-source software (SW) framework: the Distributed SW ROuter Project (DROP), which aims to develop and...

In this paper, we introduce a modeling framework based on the fluid flow approximation, which can be effectively applied to high-end nodes for transport/core networks. Our proposal starts from a detailed analysis and considerations on state-of-the-art network device architectures and QoS traffic descriptors. In more detail, the model explicitly...

Despite high potential and flexibility in developing new functionalities and mechanisms, as well as the availability of wellestablished networking SW, common criticism of Software Routers, based on COTS HW elements and open-source SW, is mainly focused on performance, especially for issues concerning the data plane. In this respect, our...

Nowadays, networking equipment is realized by using decentralized architectures that often include special-purpose hardware elements. The latter considerably improve the performance on one hand, while on the other they limit the level of flexibility. Indeed, it is very difficult both to have access to details about internal operations and to...

Besides a more widespread sensitivity to ecological issues, the interest in energy-efficient network technologies springs from heavy and critical economical needs, since both energy cost and network electrical requirements show a continuous growth, with an alarming trend over the past years. In this contribution, we explore and try to evaluate...

In this paper, we consider energy-aware network devices (e.g. routers, switches, etc.) able to trade their energy consumption for packet forwarding performance by means of DVFS techniques. We focus on state-of-the-art packet processing engines, which generally represent the most energy-starving components of network devices, and which are often...

We consider a new generation of Commercial-Off-The-Shelf (COTS) Software Routers (SRs), able to effectively exploit multi-core/CPU hardware platforms. This choice was mainly driven from the fact that SRs are one of the few platforms including power management features, and that can be easily customized. Our main objective is to evaluate and to...

The expansion of the telecommunication market to a wider number of customers, along with the increasing of services being offered, has brought the CO2 emissions to a dangerous level. Concern is due both to the impact on the environment and to the high costs caused by such energy consumptions. For these reasons, the scientific community...

The letter addresses the problem of energy saving in packet processing engines of network devices. The case of a single traffic queue is considered. The aim is to guarantee a delay constraint while adjusting the power consumption and the queue service rate. A feedback control is used, which is adaptive to the statistical behavior of traffic...

This paper deeply and experimentally analyzes the efficiency of low power idle techniques when applied to packet processing engines of network devices. To this purpose, we set up a complex testbed that allowed us to perform several measurements on energy- and network-performance indexes. The reference device platforms that we selected for this...

Due to the continuous growth of customer population, the spreading of broadband access, the increase in energy price, and the expanding number of services being offered by telecoms and providers, energy efficiency issue has become a high-priority objective for wired networks and services infrastructures. Current network devices are well-known...

The largest part of routers and switches, today deployed in production networks, has very limited energy saving capabilities, and substantially requires the same amount of energy both when working at full speed or when being idle. In order to dynamically adapt such energy requirements to the real device work load, current approaches foster the...

Multi-core processors for networking applications typically combine general-purpose cores with off-loading engines, to relieve processor cores of specialized packet processing tasks, such as parsing, classification, and security. Unfortunately, modern embedded operating systems still lack of an effective support and hardware abstraction for...

Today, backbone networks of telecom operators deploy a large number of devices and links. This is mainly due to both redundancy purposes for network service reliability and resource overdimensioning for maintaining quality of service during rush hours. Unfortunately, current network devices do not have power management primitives, and have...

In this paper, we focus on energy-aware devices able to reduce their energy requirements by adapting their performance. We consider the device to be able to save energy through two main energy-aware primitives, namely, low power idle and power scaling. In such an environment, we propose a novel and original model for accurately representing how...

Nowadays P2P applications dominate many networks. However, despite of their diffusion, the analysis of teletraffic generated by these applications in real-time environment remains an open issue. In this paper we look at analytical and simulation models, which can be used for quantifying volumes of P2P teletraffic at the network layer, to ease...

Numerous studies have shown that datacenter networks typically see loads of between 5% - 25% but the energy draw of these networks is equal to operating them at maximum load. In this paper, we propose a novel way to make these networks more energy proportional - that is, the energy draw scales with the network load. We propose the idea of...

The concept of energy-efficient networking has begun to spread in the past few years, gaining increasing popularity. Besides the widespread sensitivity to ecological issues, such interest also stems from economic needs, since both energy costs and electrical requirements of telcos' and Internet Service Providers' infrastructures around the...