SD-WAN Overview & Architecture

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.