TRADITIONAL WAN VS SD WAN

TRADITIONAL WAN vs SD WAN

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Difference between Traditional WAN & SD WAN

Below table summarizes the difference between Traditional WAN and SD WAN technologies:

PARAMETER	TRADITIONAL WAN	SD WAN
Bandwidth Crunch	When Bandwidth chokes due to high utilization by users or applications , following is the approach followed – ·WAN Optimization solution is introduced which incurs ·WAN Bandwidth is increased or additional link is taken.	When Bandwidth Customer location chokes , following is the approach followed – ·SD-WAN along with WAN Optimization module performs wan acceleration. Additionally utilizes bandwidth from secondary links to provide better experience to users and Applications.
Provisioning	Link and device provisioning time for new office setup is very high	Very low time for device configuration and new office setup
Configuration	Manually performed by skilled resources who need to have clear understanding on vendor specific device CLI.	Concepts like “Zero Touch Provisioning” allow configuration automatically downloaded by new device via single click.
Cost impact (OPEX and CAPEX)	High Cost since reliance on MPLS or PTP links. Also, may require dedicated links for mission critical or business application traffic.	Cost saving by using low cost Internet links instead of using MPLS or PTP links. No dedicated links need to be provisioned for mission critical or business application traffic.
Operational overhead and errors in configuration	High since each device needs to be managed and configured separately and errors in configuration is high.	Through automation operation and configuration cost has reduced and errors in configuration becomes low due to automation.
Performance of Applications in Cloud	Low since Branch Sites need to backhaul to Hub Sites and then	High since Branch Sites directly access applications hosted in Cloud reducing delay. Also, sophisticated path conditioning techniques that can reconstruct packets lost in transit, avoiding re-transmission will improve the user experience accessing applications.
Application level visibility	Low visibility of Application performance. Customer needs to buy a solution separately to meet this requirement.	SD-WAN solutions not only provide deep application intelligence but also give IT the ability to align application priority and performance to business intent
Consistent Policy for QOS and Security control across all locations of organization	Medium consistency level of QOs and Security control across locations	High level of QOS and Security policy control since all is centrally managed and pushed through central orchestrator which leads to consistency across all locations.
IT Infrastructure Service	Traditional WAN includes multiple single-function devices connecting via different WAN links. This leads to complexity of branch IT management and more number of devices to maintain.	SD-WAN tends to integrate services and centralize the control of services which tends to reduce number of devices to manage.
Source: ipwithease.com

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Rashmi Bhardwaj

I am here to share my knowledge and experience in the field of networking with the goal being - "The more you share, the more you learn."

I am a biotechnologist by qualification and a Network Enthusiast by interest. I developed interest in networking being in the company of a passionate Network Professional, my husband.

I am a strong believer of the fact that "learning is a constant process of discovering yourself."
- Rashmi Bhardwaj (Author/Editor)

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