Network Virtualization And Traffic Engineering In Software Defined Networks
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Network Virtualization and Traffic Engineering in Software-Defined Networks
[ANGLÈS]Lately, the emerging paradigm of Software-Defined Networking has grown in presence and claims to simplify future networking. The decoupling of network control and forwarding plane proposed by this architecture allows the control of the entire network behavior by means of a logically centralized software program (controller). Such separation of planes opens the way to Network Virtualization, which provides users a logical abstraction of underlying network resources. However, network virtualization requires a mapping phase of the virtual resources over the physical resources, which is not trivial, formally known as the virtual network embedding problem. The present document focuses in the development of a variant of one of the proposed strategies to solve this critical step, prioritizing the real-time response. The proposed algorithm uses the properties offered by the Paths Algebra mathematical framework to provide a flexible environment where it is possible to combine any number of both linear and non-linear metrics. In addition, it is also used the multi-lexical ordination, a criterion to better distinguish paths that may be considered equal by other approaches. Such algorithm has been implemented as a software application that provides a simulation environment where the virtual network embedding process can be tested for any given topology. Subsequently, all the algorithm features have been checked in a set of performance tests, focusing on those oriented to the commitment among the real-time response and the quality of the embedding solutions. In general, testing results are very promising even in densely populated backbone topologies, where the number of alternative paths among each possible pair of origin and destination nodes grows exponentially.
Software Defined Networks
SOFTWARE DEFINED NETWORKS Software defined networking suggests an alternative worldview, one that comes with a new software stack to which this book is organized, with the goal of presenting a top-to-bottom tour of SDN without leaving any significant gaps that the reader might suspect can only be filled with magic or proprietary code. Software defined networking (SDN) is an architecture designed to make a network more flexible and easier to manage. SDN has been widely adopted across data centers, WANs, and access networks and serves as a foundational element of a comprehensive intent-based networking (IBN) architecture. Although SDN has so far been limited to automated provisioning and configuration, IBN now adds “translation” and “assurance” so that the complete network cycle can be automated, continuously aligning the network to business needs. In 14 chapters, this book provides a comprehensive understanding of an SDN-based network as a scalable distributed system running on commodity hardware. The reader will have a one-stop reference looking into the applications, architectures, functionalities, virtualization, security, and privacy challenges connected to SDN. Audience Researchers in software, IT, and electronic engineering as well as industry engineers and technologists working in areas such as network virtualization, Python network programming, CISCO ACI, software defined network, and cloud computing.
VXLAN Network Virtualization Guide
"VXLAN Network Virtualization Guide" The "VXLAN Network Virtualization Guide" is a comprehensive resource that demystifies the rapidly evolving landscape of network overlays and data center virtualization. Beginning with a robust foundation in the evolution of data center architecture, the book critically examines the limitations of traditional VLANs, the fundamental concepts of overlay and underlay networking, and positions VXLAN alongside other leading protocols. Through methodical exploration, readers gain insight into the motivations that have propelled VXLAN to the forefront of scalable, cloud-ready, and service provider-grade network designs. Delving into the technical core, the guide meticulously covers the structural and operational mechanics of VXLAN, from encapsulation details and packet workflows to the pivotal role of UDP transport and the complexity of address mappings. It provides authoritative coverage of control plane mechanisms, including legacy flood-and-learn techniques and the transformative adoption of EVPN for large-scale deployments. Recognizing the operational realities of modern infrastructures, the book presents real-world implementation strategies, integration scenarios with SDN controllers, microsegmentation, high availability, monitoring, troubleshooting, and automation within both enterprise and service provider environments. With a forward-looking perspective, the guide addresses the critical challenges of security, compliance, and risk management in VXLAN-enabled architectures, offering actionable strategies for encryption, trust, monitoring, and incident response. It further explores advanced topics and the future direction of VXLAN, including protocol extensions, segment routing integrations, programmability, and cloud-native networking paradigms. Whether you are a network architect, engineer, or IT strategist, this guide offers an indispensable roadmap for designing, deploying, and evolving scalable, secure, and agile network infrastructures with VXLAN.