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SD-WAN Overview & Architecture

SD-WAN Overview & Architecture

Posted on Jan 08, 2020 (0)

SD-WAN Overview & Architecture

SD-WAN Definition:

SD-WAN is software defined Wide Area Network mostly used to provide accelerated service delivery , better application performance by utilizing multiple WAN links by automating  network deployment.

Need for SD-WAN:

SD-WAN is needed to solve following business challenges:

  • High access cost for MPLS based network for better application performance
  • Branch deployments are complex in nature day by day
  • Issue faced due to static traditional Architecture while migration to dynamic and public cloud environments.

Challenges faced by using traditional WAN

  • Complex Static WAN Architecture and need to simplify WAN for enterprise Branch offices
  • Inefficient WAN utilization in case branch has multiple link  
  • Branch faces often insecure communication, even if uses IPSEC, causes latency due to larger packet size
  • Branches faces Rigid WAN circuit Requirement
  • Backhauling leading Performance issue of application
  • Expensive Traditional Private WAN links
  • Cloud Migration requirements

Features of SD-WAN:

Below are the features of SD-WAN:

  • SD-WAN visualize the network
  • It ensure the secure Overlay
  • It simplifies the Service Delivery
  • It is well interoperability with traditional WAN segments
  • It uses Low cost effective hardware
  • It supports automation and business policy framework
  • Enables Managed services like monitoring, troubleshooting, configuration
  • It provide zero-touch deployment of branches.


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