Enterprises of all sizes are looking to SD-WAN as a means of addressing the growing network traffic driven by the migration of data centers to the cloud, the proliferation of the Internet of Things (IoT), the focus on collaboration, and the unprecedented demand for wireless devices and rich, bandwidth-intensive applications. Those that convert 90% or more of their sites to SD-WAN see measurable improvements: 20% reduction in WAN resources, 33% reduction in WAN staff time spent troubleshooting, 69% reduction in the time a site is down in a year, and 80% reduction in the extent of individual incidents.
What’s changing with SD-WAN?
SD-WAN is an application for managing WAN networks, or software-defined networking (SDN) in a WAN context. Enterprises use SD-WAN to connect corporate networks across large geographic areas and branch offices. SD-WAN creates an overlay on the existing network topology, making it possible to connect multiple geographically dispersed facilities. SD-WAN eliminates a significant amount of hardware and service costs required to connect solutions via the cloud. A fail-safe SD-WAN solution for real-time and mission-critical communications has the following characteristics:
Continuous, unidirectional measurement of packet loss, latency, jitter, and bandwidth utilization across all possible paths between two locations.
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Sub-second responses to adapt to network issues such as link or device failures and congestion-related brownouts that impact application performance across the WAN.
Intelligent link aggregation using full bandwidth across different connections, even for a single TCP stream.
Optional package replication, supporting platinum-quality real-time applications.
Multi-source, ingress quality of service (QoS), enabling real-time applications to run over WAN connections with shared ingress and with continued connection canada phone number library list utilization at 90 percent or higher without impacting user quality of experience (QoE).
Centralized orchestration and analytics, offering ease of management with unprecedented, highly granular WAN visibility.
Figure 1 – Network Variations
There are compelling reasons to adopt SD-WAN: the technology reduces latency, optimizes WAN infrastructure utilization, reduces costs, and provides agb directory better management. Figure 2 – Difference between SD-WAN and MPLS[/caption] With SD-WAN trends, every CIO should ask themselves: “In which line of my business can SD-WAN add value and the greatest ROI? And what is the business case for SD-WAN?”
Defining the business case
Identifying and defining the business case is the first step in deploying SD-WAN. Naturally, IT managers will want to increase bandwidth availability to meet the demands of business growth. Doing so with MPLS is expensive. SD-WAN, on the other hand, allows for increased bandwidth without significantly increasing costs. Companies are considering SD-WAN and upgrading their infrastructure to take advantage of MPLS, ADSL, and 3G/4G/5G connections. SD-WAN provides visibility into applications, allowing IT managers to prioritize traffic based on application criticality.
Analyzing the business case
Once the business case has been defined and the business objectives have been established, effort should be directed towards analyzing the case for appropriate solutions. This involves examining:
Architecture: Does your company have a centralized, widely distributed, cloud-based network security architecture?
Usage : Is there CIFS traffic on your WAN network? What about real-time traffic?
Security analysis: This is an important aspect of the analysis and the solutions implemented must be aligned with the business compliance requirements. The analysis should include:
Traffic visibility requirements;
Proxy Server Architecture
Compliance and isolation requirements
Cost: Do you have MPLS running in your company or are you planning to acquire it? What is the cost per Mbps? What is the cost to manage and maintain the WAN hardware?
Identifying Potential Issues During the technical analysis phase, WAN deficiencies need to be understood and documented. This will be of great importance when determining SD-WAN specifications. This stage requires data from the existing network, monitoring platforms, or the service provider, and then subjecting the data to analysis. Some topics to consider include:
Telecom provider dependency :
Does the company need a specific service provider to provide MPLS links and Internet access? This should be analyzed by location, and the respective participation of MPLS and Internet service providers should be recorded separately.
Decentralized management The enterprise has invested heavily in traditional WAN management and, in most cases, has distributed control over the WAN. The SD-WAN management model is centralized and completely different. Moving from one to the other can be challenging.
Limited automation by configuration :
Managing multiple last-mile connections, optimizing equipment, and maintaining policy records is a manual process. But some companies can achieve partial automation.
Hybrid WAN The extent to which an enterprise uses a hybrid WAN (a combination of MPLS and Internet links) determines the effectiveness of the SD-WAN implementation. SD-WAN intelligence determines how to distribute traffic across the links.
Operational complexity:
The complexity of connectivity requirements, bandwidth utilization, and the number of Internet-based applications will help determine various parameters for a proper SD-WAN implementation.
Bandwidth utilization: Bandwidth utilization by the growing number of Internet applications is critical to forecasting costs and meeting the MPLS cost target.
SaaS and public cloud on-demand: Estimating SaaS and cloud-based traffic will determine the load on the SD-WAN.
QoS: By analyzing the WAN configuration, the company will understand how Quality of Service is configured .
Business growth: What is the forecast for business growth? Discussions with senior management will define the future roadmap for SD-WAN implementation.
Choosing an SD-WAN
By creating a business case , analyzing it and listing the problem areas, the most suitable SD-WAN solutions can be identified. At this stage, companies need the assistance of an experienced solution integrator who can evaluate the various SD-WAN options and choose the best suitable solution. The SD-WAN market has a wide range of options. It is difficult for a company to determine the technical features that meet business requirements, overcome existing problems and provide a future-proof solution. This is the task of the integrator partner. The benefits of SD-WANs are irrefutable. These benefits are both technical and business in nature and solve several problems associated with traditional WANs. With the increasing adoption of cloud-based technologies, the opening of new facilities, the need for unified communications and the growth of video-based communications, the company will have no choice but to invest in SD-WAN. SD-WAN
technology creates a more efficient and dynamic network, providing:
Simplified management and operation.
Cost reduction.
Increased availability, reliability and agility.
More visibility and security.
