SD-WAN Deployment is often mistaken for its parent co, Software Defined Network (SDN). SD-WAN focuses only on the WAN and connects multiple geographically dispersed sites belonging to a single organization (head office, data center, branch office, remote user, etc.) on a regional, national, or global basis.
There are a few general structures of SDN & SD-WAN.
- Both are deliberate to run on Commodity X86 hardware,
- Both can virtualize
- Both support a new virtual network (VNF) features such as firewall and DPI.
- Both have a common philosophy-separation of control planning and data planning.
SDN designed to meet the ever-changing needs of modern IT environments to incorporate local networks or service provider networks. The goal was to create a dynamic, flexible and scalable connection to meet the changing demands of the data center. These are the same basic principles that supply SD-WAN. However, it is crucial to understand the differences.
Differences between SD-WAN and SDN are:
- The SDN is fully programmable by the end-user or client, allowing for efficient change management and configuration capabilities. While SD-WAN relies on a familiar premise of programmability, its strength is that it eliminates the complexity of the end-user, because the SD-WAN provider handles backstage programming.
- SDN is qualified by Network Function Virtualization (NFV), which offers multiple network functions virtualized through software. These are integrated previously into patented and closed systems that led to vendor blocking. Instead, SD-WAN offers software-defined application routing that can be virtualized and executed on an SD-WAN-compatible device or in a virtualized environment/cloud.
- SDN used in a data center (also called SDDC), which is an actively controlled environment with crucial physical security, high bandwidth, and low latency. Also, unless the network has a problem, the bandwidth and latency are constant. In contrast, WAN connections have a high degree of variability. The controller can be located in a separate geographical location and can be thousands of kilometers away from the areas of branches that are characterized by very variable latency.
SD-WAN offers several advantages, such as reduced costs, improved performance, elastic security perimeter, and shorter implementation times compared to traditional router-based WANs. The emergence of public cloud computing has made the company’s WAN architectures sub-optimal in terms of price and performance.
- SD-WAN is a genuinely epic way of construction, implementation, and operation of enterprise WANs. It provides a simplified way to implement and manage connectivity from branch offices cost-effectively.
- Enables organizations to adopt new transport mechanisms as they become available and not tied to specific vendor technology or the WAN. It’s easy to add more transports to the mix and manage them as a single material, as SD-WANs transport agnostically as opposed to older WAN solutions.
- Supports policy-based WAN optimization by dynamically choosing the right traffic paths, which is hugely involved with traditional hardware. These policies can be created using a simple business language and designate permissions for specific applications, users, and SLA (Service Level Agreement) clients.
WAN Enterprise solutions have evolved considerably over the past decade. More recently, private cloud, public cloud, and hybrid models have come.
SD-WAN Solution allows organizations to approve a smart branch virtual router that funds multiple services, intelligent application-based transfer/routing, enhanced security and improved application performance for today’s end-users. An encrypted overlay creates a unified structure from a physical sublayer that can include private circuits, low-cost broadband, and even LTE.
In conclusion, the following three factors (new application requirements, increased use of the Internet, and adoption of public cloud services) determine the need for full use of WAN solutions that integrate Internet and MPLS options simultaneously. As an integrated solution.