Common sense suggests that networks are not random mazes of purposeless connections, but these connections organized so can perform their functions well. One function common to many is targeted transport or navigation. Here, using game theory, we show minimalistic designed maximize the navigation efficiency at minimal cost share basic structural properties with real networks. These idealistic Nash equilibria a network construction whose purpose find an optimal trade-off between and...

Mininet is a great prototyping tool which combines existing SDN-related software components (e.g., Open vSwitch, OpenFlow controllers, network namespaces, cgroups) into framework, can automatically set up and configure customized testbeds scaling to hundreds of nodes. Standing on the shoulders Mininet, we implement similar system called ESCAPE, be used develop test various service chaining architecture. Our framework incorporates Click for implementing Virtual Network Functions (VNF),...

Multipath TCP is an experimental transport protocol with remarkable recent past and non-negligible future potential. It has been standardized recently, however the evaluation studies focus only on a limited set of isolated use-cases comprehensive analysis or feasible path Internet-wide adoption still missing. This mostly because in current networking practice it unusual to configure multiple paths between endpoints connection. Therefore, conducting precisely controlling multipath experiments...

Large-scale information dissemination in multicast communications has been increasingly attracting attention, be it through uptake new services or recent research efforts. In these, the core issues are supporting increased forwarding speed, avoiding state elements, and scaling terms of tree size. This paper addresses all these challenges-which crucial for any scalable scheme to successful-by revisiting idea in-packet Bloom filters source routing. As opposed traditional filter concept, we...

OpenFlow is the most promising architecture for future Software Defined Networks (SDNs). However, from aspects of large-scale or carrier-grade networks, it still lacks some key components. For example, QoS (Quality Service) provisioning an indispensable part such production networks. During evolution standard, capabilities have been added to protocol, however, even latest version has only a limited and not well-defined framework. Hence, integrated support missing in current experimental test...

Large-scale information distribution has been increasingly attracting attention, be it through uptake in new services or recent research efforts fields like information-centric networking. The core issue to addressed is the more efficient of a large set receivers. Avoiding state forwarding elements crucial for any scheme successful. This paper addresses this challenge by revisiting idea in-packet Bloom filters and source routing. As opposed traditional filter concept which represent trees...

The rise of cloud services poses considerable challenges on the control both and carrier network infrastructures. While traditional telecom rely rather static processes (often involving manual steps), wide adoption mobile devices including tablets, smartphones wearables introduce previously unseen dynamics in creation, scaling withdrawal new services. These phenomena require optimal flexibility characterization services, as well orchestration infrastructure. This paper proposes a unified...

Mininet is a great prototyping tool which combines existing SDN-related software components (e.g., Open vSwitch, OpenFlow controllers, network namespaces, cgroups) into framework, can automatically set up and configure customized testbeds scaling to hundreds of nodes. Standing on the shoulders Mininet, we implement similar system called ESCAPE, be used develop test various service chaining architecture. Our framework incorporates Click for implementing Virtual Network Functions (VNF),...

The International Friction Index (IFI) is used for consideration of skid resistance and macrotexture in a probabilistic pavement performance modeling framework. IFI provides friction scale that can be comparisons at international level consists values, as influences the variation by speed. Threshold values are established to define high quality low conditions combined assess adequacy scheduling maintenance activities. methodology three steps: (1) Use local device-specific thresholds on...

Due to the heterogeneous and distributed nature of computer networks, detection misconfigurations software/hardware failures is frequently reported be notoriously non-trivial. The advent SDN complicates situation even more, since besides troubleshooting, problem finding software bugs in controller/switch/VNF implementations also has solved. Today a wealth general SDN-specific troubleshooting tools are available which usually tailored identify network-related errors particular nature. In this...

Due to its simplicity, transparency and performance, Flow Visor takes it all in today's virtualization tools for OpenFlow networks. We argue that this effectiveness comes at the price of intolerance towards diverse versions used simultaneously also limited switch functionality. What is more based management frameworks cannot run configure network controllers. In paper we present an integrated framework, capable (i) running managing multiple instances switches with different forwarding...

Many networking visioners agree that 5G will be much more than the incremental improvement, in terms of data rate, 4G. Besides mobile networks, fundamentally influence core infrastructure as well. In our vision realization challenging promises (e.g. extremely fast, low-overhead, low-delay access mostly cloudified services and content) require massive use multipathing equipped with low overhead transport solutions tailored to reliable secure retrieval from cloud architectures. this demo we...

The limited capabilities of the switches renders implementation unorthodox routing and forwarding mechanisms as a hard task in OpenFlow. Our high level goal is therefore to inspect possibilities slightly smartening up OpenFlow switches. As first step this direction we demonstrate (with Bloom filters, greedy network coding) that very computational capability enables us natively support experimental technologies while preserving performance. We distribute demos source files ready-to-experiment...

Abstract The rich club organization (the presence of highly connected hub core in a network) influences many structural and functional characteristics networks including topology, the efficiency paths distribution load. Despite its major role, literature contains only very limited set models capable generating with realistic structure. One possible reason is that divisive property among complex which exhibit great diversity, contrast to other metrics (e.g. diameter, clustering or degree...

In this demo, we show a novel method to multi-layer service orchestration in multi-domain network. This is basic implementation of the three layered concept with designed by UNIFY project. A global orchestrator capable instantiating elements, i.e., virtual network functions (VNFs), separate domains. Dedicated local orchestrators indifferent infrastructure domains are responsible for setting up new VNF instances and configuring underlying Our based on ESCAPE prototyping framework an OpenStack...

The last two decades of network science have discovered stunning similarities in the topological characteristics real life networks (many biological, social, transportation and organizational networks) on a strong empirical basis. However our knowledge about operational paths used these is very limited, which prohibits proper understanding principles their functioning. Today, most widely adopted hypothesis structure shortest path assumption. Here we present striking result that various are...

The limited capabilities of the switches renders implementation unorthodox routing and forwarding mechanisms as a hard task in OpenFlow. Our high level goal is therefore to inspect possibilities slightly smartening up OpenFlow switches. As first step this direction we demonstrate (with Bloom filters, greedy network coding) that very computational capability enables us natively support experimental technologies while preserving performance. We distribute demos source files ready-to-experiment...

Today’s ever-growing networks call for routing schemes with sound theoretical scalability guarantees. In this context, a scheme is scalable if the amount of memory needed to implement it grows significantly slower than network size. Unfortunately, characterizations only exist shortest path routing, but general policy that current and future increasingly rely on, very little understanding available. paper, we attempt fill gap. We define framework study scaling properties three fundamental...

Network Coding (NC) shows great potential in various communication scenarios through changing the packet forwarding principles of current networks. It can improve not only throughput, latency, reliability and security but also alleviates need coordination many cases. However, it is still controversial due to widespread misunderstandings on how exploit advantages it. The aim paper facilitate usage NC by $(i)$ explaining performance network (regardless existence any butterfly network), $(ii)$...

Power management is a critical issue for mobile devices, where significant portion of the total system energy can be often consumed by heavy wireless network activity. In this paper we present framework that reduces consumption devices during streaming video content over Wireless LAN networks utilizing power saving mechanisms defined in IEEE 802.11e standard. The allows applications to directly optimize overall efficiency controlling sleep cycles adapters based on QoE. employs simple QoE...

Multipath TCP is an experimental transport protocol with remarkable recent past and non-negligible future potential. However the lack of available large-scale testbeds publicly accessible multiple paths grossly prohibits adoption technology. Here, we demonstrate a multipath playground deployed on PlanetLab Europe, which can be used either by experimenters researchers to test verify their multipath-related ideas (e.g. enhancing congestion control, fairness or even arrangement paths) also...

With the advent of online social media, latency became a primary factor and large Content Delivery Network (CDN) providers optimize their networks for. While many ingredients (e.g. propagation delay, transmission processing delay) end-to-end can be adequately characterized, capturing queuing delay seems to difficult task due complex often unpredictable nature Internet paths imperfect tools used for measurements. Dealing with is so challenging that most papers concerning completely ignore it...

SDN opens a new chapter in network troubleshooting as besides misconfigurations and firmware/hardware errors, software bugs can occur all over the stack. As an answer to this challenge networking community developed wealth of piecemeal tools aiming track down or specific nature (e.g. given layer). In demonstration we present EPOXIDE, Emacs based modular framework, which effectively combine existing single platform defines possible way integrated troubleshooting.