There has been much debate in the Network world between virtual private LANs (VPLS) and SD-WANs. The crux of this debate revolves around whether a premise Independent security appliance, such as a premise independent firewall (PIA), should be deployed with a SONA over Copper (SOC) network. Many in the networking community feel that a PIA is not a good choice for Intranet sites and portals, since an Intranet site is usually located in a remote location. However, most companies are now finding it necessary to deploy a PIA for internal corporate intranet portals and are moving away from SONAs.
Many businesses, such as those in the finance industry, retail industry, pharmaceutical and banking are finding it difficult to adapt to change in business technology. Virtual private LANs have become very useful for these companies and many other types of businesses that face similar applications. Enterprises need to consider several factors when choosing an appropriate SD-WAN deployment. These factors include site availability, bandwidth, site reliability, management of the WAN interface, application requirements and ease of manageability and integration with other applications and devices.
Although improving site availability is important for nearly all businesses, it is particularly important for those businesses operating in high traffic areas. Since most web traffic passes through the WAN interface of a premise, businesses that have little downtime will often suffer. Therefore, an enterprise may want to consider the use of a SONA over Copper WAN deployment if they have little downtime, and also want to take advantage of a cheaper form of WAN connectivity. Some of the most suitable locations for this deployment include corporate offices, branch offices and satellite offices.
One of the biggest challenges facing the SD-WAN market is the ability to provide reliable services and the ability to remain competitive in the marketplace. This is especially true since some WAN vendors have been providing superior service for their clients by bundling their hardware with their software and then charging for the service. In order to stay ahead of these WAN vendors, many WAN vendors have provided solutions that address some of these challenges, such as the utilization of LPE or LTP as a service. By using LPE or LTP as a service instead of the more expensive WAN equipment, enterprises can avoid having to provide a large up front capital for the equipment and network infrastructure required for a SD-WAN deployment.
When an enterprise chooses to go the LPE route for their SD-WAN deployment, they will be pleased to know that they will save a lot of money on hardware costs. The main problem with LPE is that it can consume a lot of bandwidth. Because of this, an enterprise may require a large bandwidth cap to ensure that data is delivered over long distances. However, it should be noted that while LPE can save an enterprise a lot of money on hardware expenses, the cost of the equipment itself can become quite expensive. Furthermore, there are still other operational issues that can arise, such as ensuring that there are enough nodes in the network to handle all of the traffic that is being generated by the application. With this, the number of nodes that are needed may increase and this can cause the entire system to break down when the number of nodes is much higher than the amount of bandwidth available.
On the other hand, SD-WAN software-defined networking has provided solutions that allow enterprises to save money and improve their overall network infrastructure. One important thing to note is that this solution was designed to provide fast connectivity and efficient data centers without the need to invest in the expensive hardware that goes along with traditional SD-WAN deployment. Therefore, unlike the traditional WAN, the flexibility provided by SD-WAN allows enterprises to set up their own private clouds in which they can host their applications and services. They can also use the cloud for storing data, rather than keeping it in their own data centers. In addition, they can also reduce costs by avoiding the cost that is associated with establishing and maintaining physical connections between network elements.
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