Debunking Common SD-WAN Misconceptions


Debunking Common SD-WAN Misconceptions

Apr 26, 2016

Debunking Common SD-WAN Misconceptions
The software-defined wide area network (SD-WAN) created a great deal of excitement when it first came on the scene, in large part because IT professionals were in search of an alternative for MultiprotocolLabel Switching (MPLS).Along with this hype rose a host of misconceptions, which will be addressed here.

SD-WANfacilitates the bonding of multiple WAN connections (these being transport pipe, Internet, orMPLS), and the effective use of available bandwidth.WANsthemselves are simply computer networks that span large geographical areas and consist of two or more connected local networks.

The following provides clarification around some of the misconceptions that have arisen as SD-WAN’s popularity continues to grow.

Misconception: It Will RenderMPLSObsolete

Some SD-WAN users believe that it will imminently replaceMPLS. However, there will continue to be a need forMPLSand other modes of transport — at least for the foreseeable future.

SD-WAN eliminates the backhaul penalties of MPLS and leverages the Internet to provide secure, high performance connections to the cloud. That said,MPLSis a WAN platform, and in it, users have complete control over the engineering of traffic. Even if employing SD-WAN, keeping anMPLSlink in reserve provides redundancy and ensures QoSfor real-time traffic.

Misconception: The Only Benefits Are Cost Related

SD-WAN provides businesses with substantial cost savings.But the biggest boon with regard to the technology is its user-friendliness. Centralization and GUI-based provisioning provide an easier work environment compared toMPLS. Everything is built around the plug-and-play concept, and the point-and-click services are of great benefit, particularly for those who are not IT experts.

Misconception: SD-WAN and WAN Optimization are the Same

The goal of WAN optimization is to reduce bandwidth use. SD-WAN is more than that; it is intended for non-delay sensitive Transmission Control Protocol (TCP) traffic. Reducing TCP bandwidth results in more bandwidth for delay sensitive traffic, such as Voice over Internet Protocol (VoIP).


SD-WAN is a promising technology that enables enterprises to deploy their WANs faster, with significant cost savings.SD-WAN also provides businesses with a host of additional benefits, including:

  • An application-defined network
  • Increased business agility
  • Optimized cloud architecture
  • Multipath networks
  • Dynamic meshing

But rather than being in competition with MPLS,the two complement each other because they can be used in tandem to handle a wider variety of data than either could alone.

To learn more about networking, scalable solutions, and cutting communications costs,contact QOS Networks today.

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