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SD-WAN Fundamentals
A Practical Guide to Designing, Building, and Operating Cisco Catalyst SD-WAN (Viptela)
This book is 100% completeLast updated on 2026-07-07
Anyone can turn on SD-WAN. Far fewer can design it, migrate a live network onto it without an outage, steer voice and cloud traffic intelligently, prove it's secure to an auditor, and still sleep at night. SD-WAN Fundamentals follows one company through the whole journey — design, build, migrate, secure, operate — so you learn SD-WAN the way you'll actually use it: as a project, end to end.
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About
About the Book
Most SD-WAN material teaches you the features. This book teaches you the project. SD-WAN Fundamentals walks you through the entire lifecycle of a real Cisco Catalyst SD-WAN (Viptela) deployment — from the first design meeting to the thousandth day of operations — by following one fictional company, Meridian, as it migrates a live 40-site retail estate onto the fabric without taking the business down. This is a practitioner's field guide, not an exam cram. There are no quizzes and no memorisation drills — just the mental models, design decisions, real configurations, and hard-won habits you need to run a project like this yourself. What you'll learn: How the fabric actually works — control plane vs data plane, OMP, TLOCs, colors, IPsec, BFD, and end-to-end segmentation, explained so they finally click.
How to design against requirements — transport, topology, segmentation, controller sizing, addressing, and certificates, captured in a real high-level design.
How to build and migrate safely — stand up controllers, onboard your first edge with zero-touch provisioning, and migrate live sites in waves with a clean rollback at every step.
How to steer traffic — centralized control policies for topology, and data policies with Application-Aware Routing, Direct Internet Access, QoS, and service chaining.
How to secure and prove it — segmentation as security, the embedded security stack, secure Direct Internet Access, and a compliance story you can demonstrate live.
How to extend and operate it — cloud on-ramp for IaaS and SaaS, when (and when not) to adopt advanced features, and a complete monitoring and troubleshooting playbook.
Who it's for: Network engineers and architects moving into SD-WAN, anyone about to run or support a Catalyst SD-WAN deployment, and experienced engineers who want a clear, opinionated, project-shaped reference instead of scattered documentation.
Inside the book: Ten chapters, a single end-to-end project narrative, real IOS XE configurations, 60+ original diagrams, a three-part troubleshooting playbook, and a glossary of every key term. The technology is Cisco Catalyst SD-WAN — but the deeper discipline is portable to any platform and to any serious network engineering.
Author
About the Author
Jozef Baros
Jozef Baros is a Senior Network Architect, Teamleader, cybersecurity and technology automation specialist with over a decade of hands-on experience designing, securing, building, and operating large-scale enterprise networks for one of Europe's leading telecommunications providers. Working daily with Cisco and AI infrastructure across global enterprise environments, Jozef brings a rare combination of deep technical expertise and a practical, results-driven approach to complex technology challenges. His professional work spans network architecture, infrastructure automation, cybersecurity and cross-functional project management — giving him a uniquely grounded perspective on how technology actually performs under real-world conditions, not just in theory.
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