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What is SD-WAN ? Software-Defined WAN (SD-WAN) is an overlay architecture that overcomes the biggest drawbacks of traditional WAN. SD-WAN builds a secure, unified connectivity over any transport (MPLS, Broadband, LTE, VSAT etc.) and provides simplified operations with centralized management, policy control and application visibility across the enterprise.Significance of Viptela The Most Deployed SD-WAN in Global 1000 Companies. With SD-WAN built on the Viptela Fabric, enterprises can provide secure connectivity everywhere, deploy new services and applications faster, and drastically simplify operational complexity in the WAN.In this course you will find explanation of Viptela controllers and nice and easy way to learn core components of SDWAN.SD-WAN is a software-defined approach to managing the WAN.Key advantages include:Reducing costs with transport independence across MPLS, 4G/5G LTE, and other connection types.Improving application performance and increasing agility.Optimizing user experience and efficiency for software-as-a-service (SaaS) and public-cloud applications.Simplifying operations with automation and cloud-based management.Why now for SD-WAN?The traditional WANThe traditional WAN (wide-area network) function was to connect users at the branch or campus to applications hosted on servers in the data center. Typically, dedicated MPLS circuits were used to help ensure security and reliable connectivity. This doesn't work in a cloud-centric world.Today's IT challengesTimes have changed. As businesses adopt the use of SaaS and infrastructure-as-a-service (IaaS) applications in multiple clouds, IT is realizing that the user application experience is poor. That is because WANs designed for a different era are not ready for the unprecedented explosion of WAN traffic that cloud adoption brings. That traffic causes management complexity, application-performance unpredictability, and data vulnerability.Further, opening the enterprise to the Internet and the cloud exposes major threat and compliance issues. It is extremely challenging to protect the critical assets of an enterprise when applications are accessed by a diverse workforce, including employees, partners, contractors, vendors, and guests. Enabling broadband on the WAN makes the security requirements more acute, creating challenges for IT in balancing user experience, security, and complexity.The new WANNew business models drive the need for a new network model.SD-WAN addresses the current IT challenges. This new approach to network connectivity can lower operational costs and improve resource usage for multisite deployments. Network administrators can use bandwidth more efficiently and can help ensure high levels of performance for critical applications without sacrificing security or data privacy.What are the benefits of SD-WAN?The traditional WAN architecture was limited to enterprise, branch, and data center. Once an organization adopts cloud-based applications in the form of SaaS and IaaS, its WAN architecture experiences an explosion of traffic accessing applications distributed across the globe.These changes have multiple implications for IT. Employee productivity may be compromised by SaaS-application performance problems. WAN expenses can rise with inefficient use of dedicated and backup circuits. IT fights a daily, complex battle of connecting multiple types of users with multiple types of devices to multiple cloud environments.With SD-WAN, IT can deliver routing, threat protection, efficient offloading of expensive circuits, and simplification of WAN network management. Business benefits can include the following:Better application experienceHigh availability, with predictable service, for all critical enterprise applicationsMultiple hybrid active-active links for all network scenariosDynamically routed application traffic with application-aware routing, for efficient delivery and improved user experienceImproved OpEx, replacing expensive Multiprotocol Label Switching (MPLS) services with more economical and flexible broadband (including secure VPN connections)More securityApplication-aware policies with end-to-end segmentation and real-time access controlIntegrated threat protection enforced at the right placeSecure traffic across broadband Internet and into the cloudDistribute security to the branch and remote endpoints with NGFW, DNS security, and NGAVOptimized cloud connectivitySeamless extension of the WAN to multiple public cloudsReal-time optimized performance for Microsoft Office 365, Salesforce, and other major SaaS applicationsOptimized workflows for cloud platforms such as Amazon Web Services (AWS) and Microsoft AzureSimplified managementA single, centralized, cloud-delivered management dashboard for configuration and management of WAN, cloud, and securityTemplate-based, zero-touch provisioning for all locations: branch, campus, and cloudDetailed reporting of application and WAN performance for business analytics and bandwidth forcasting

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