If you been working in networking a little longer than you may want to admit, you might be predisposed—albeit incorrectly—to think of network migration projects as rather daunting and highly disruptive, with long planning time frames punctuated by planned outages.
Migrating to a next-gen Wide Area Network (WAN) is far easier today than ever before—why? By definition, a Software-Defined WAN (SD-WAN) enables us to overcome many of the constraints previously imposed in a “hardware-defined” network. Logically abstracting network functions from physical network infrastructure has created new possibilities with much greater flexibility.
An easy choice
With respect to implementing a new network, we can layer an SD-WAN “over the top” (OTT) of existing public or private access , with or without addition of a diverse loop. With no need to “rip and replace” existing assets, individual network nodes can be independently upgraded with no disruption in service. Human resources supporting the WAN and dependent IT can schedule and manage the work required as part of their normal activities rather than instead of them. Implementing an SD-WAN has become so “easy”—at least in contrast to typical network migrations of the past—that service providers can deploy SD-WAN trials without any impact to a customer’s current network.
True business continuity
Adding diverse connections to an SD-WAN can enable virtually 100% uptime—that’s true business continuity. With confidence earned from a track record of success, Windstream Enterprise now offers a 100% uptime service level agreement (SLA). In the unlikely event that an SD-WAN with diverse connections does experience an outage, granular software-enabled visibility and control enable AI network to quickly identify and resolve the root cause, as well as prevent it next time around.
If flexible and seamless network conversions that lead to a world of complete piece of mind, backed by 100% uptime SLA are of interest to you, please join me in a live webinar on September 12 to learn more. If you’re reading this afterward, you can still take advantage of the replay.
Register to attend
Next Gen SD-WAN = Flexible Network Conversion + 100% Uptime
Thursday, September 12, 2019
1:00 pm EDT | 11:00 am PDT
Successfully completing any project of significance requires thoughtful planning and execution. In most cases, the execution phase will be achieved more efficiently and cost-effectively when more time is invested in the planning phase. Sooner or later, network upgrades will undoubtedly be required to support the ever-changing needs of your organization. Whether you have already decided to deploy a software-defined wide area network (SD-WAN) or you’re still contemplating it as a possibility, there are several questions that you should ask yourself in advance—especially if you are a die‑hard do-it-yourselfer (DIYer).
How critical is time to solution?
Executive approvals for changes (and new expenses) usually come with expectations, including deadlines. Getting external assistance may enable you to realize a return on investment faster. The sooner the new solution is in place, the sooner your customers and/or employees will begin to realize all the benefits that are motivating you to make a change.
What is my capability to integrate SD-WAN into my legacy WAN?
One of the most attractive aspects of a SD-WAN is the ability to build it “over the top” of existing WAN assets. The transition can be seamless and staged by location and over time. Avoiding disruptions is certainly an attractive alternative to “big bang” “rip‑and‑replace” projects that must be coordinated with painful precision outside of business hours. Regardless of your internal capabilities to layer a SD-WAN onto your environment, leveraging external assistance will help you get to the desired end state faster, without hick-ups and potentially more cost effectively.
Do I have access to skilled SD-WAN resources?
SD-WAN is a rapidly evolving technology—the demand for professionals with the desired expertise and experience may exceed supply and those available may not be affordable. Deploying a SD-WAN requires different sets of knowledge and skills than operating a SD-WAN. It may make sense to align your internal human resources to ongoing operations after using external resources for rapid deployment.
Do I want to manage multiple providers for diverse access?
If you’re 100% in a DIY mode, then you are obviously 100% responsible for everything. To ensure network uptime, it’s imperative that you have diverse access. Depending on the criticality of a given location, you may need diversity in access circuits, access types, and access providers. With increasing diversity comes increased complexity. If a network impairment or outage occurs, would you much rather let a trusted business partner resolve it versus find yourself battling with multiple access providers who may be inclined to point fingers at each other?
Does my organization favor CAPEX or OPEX spending?
Every organization has a unique strategy for financial success. As an important element of that strategy, an organization may prefer operational expenditures (OPEX) over capital expenditures (CAPEX). With an ever-accelerating rate of technological change, it often makes financial sense to pay for services rather than buy hardware and software that will reach end-of-support and end-of-life status at some point. In general, these favorable financials are driving applications and data “to the cloud.” Do you need to build, own and operate your own SD-WAN or do you simply need the flexible functionality that a SD-WAN provides?
How important is a single “pane of glass” management console?
A DIY approach may leave you with multiple management consoles for disparate systems, unless you have in-house resources with the expertise and time to create a unified view. Having a single “pane of glass” is critical to recognizing potential problems and proactively addressing them—before customers or employees perceive an impairment or an outage. A single “pane of glass” with real-time data provides even greater flexibility when it is the one in your hand. A “mobile first” philosophy for network management is essential as your workforce becomes more distributed, virtualized and mobile. Would you like to manage your SD-WAN from anywhere on any device?
What Service Level Agreements am I prepared to support?
In DIY mode, you must negotiate Service Level Agreements (SLAs) with a broad set of leaders in your organization; those leaders may have very different expectations that might even result in different SLAs. Regardless of what you negotiate, you will be the primary point of escalation when expectations are not met or simply forgotten. By leveraging an external partner, you will have a consistent, clearly-defined and hard‑to‑match SLA. If an impairment or outage occurs would you rather be another agent of escalation or the agent of resolution?
How much resiliency is needed in my SD-WAN deployment?
We’ve already noted that access diversity is a desired element of most WAN deployments. Beyond access and—at a higher level—how well prepared are you to continue operating in response to a true disaster? Do you need to be fully functional in minutes, hours or days? The tighter your “resume business as usual” requirements for resiliency are, the more redundancy infrastructure you need with automatic fail-over capabilities. Geographic diversity in the centers hosting your mission-critical applications and data becomes invaluable when entire regions are impacted by disaster events. Do you have the geographic footprint necessary to fully manage your own business continuity/disaster recovery plan or do you need a partner with a national network?
Still bent on deploying a SD-WAN on your own?
Every organization has unique opportunities and challenges. The forgoing set of questions is not intended to be all-inclusive but, hopefully, it has provoked more thoughts for planning to deploy your SD-WAN. Windstream Enterprise welcomes the opportunity to persuade die-hard network DIYers that we can help you achieve your desired results faster and more cost-effectively. Be sure to also check out this whitepaper: DIY or NSP? Finding the optimal approach to deploying a next-generation SD-WAN for even more information on the key considerations for deploying a SD‑WAN.
Machine Learning and AI Promise to Take SD-WAN Into the World of Intent
Last month, my mother-in-law’s best friend came to town, so she rounded up “the gals” for dinner and drinks. A night without the kids is rare for me (and significantly more relaxing) so I found myself in the midst of half a dozen 60 to 70-year-old women. The conversation eventually got to technology; how different and difficult it is for their generation to embrace it (though all had smartphones in their pockets). They’ve noticed facial recognition on Facebook; same for police cameras. One lady going to France next month raved about Google translate. Another nonchalantly mentioned a recent ride in a self-driving Tesla.
As tech savvy as they seemed, I didn’t dare try to explain how artificial intelligence and machine learning play a role in all of these things (or in what I do in my chosen profession). Though both have most definitely started to touch our daily lives, no matter what your age.
What changed? How did my mother-in-law and her friends start benefitting from AI without knowing it? First, compute power is now big enough for the amount of data that needs to be gathered, sorted, calculated and stored to make AI happen. Second, neuro-networks only became real rather recently, and we have since shown that we can train computers via deep (machine) learning. And finally, steady advances in enterprise networking have made it possible to conduct real time transactions with cloud-based AI solutions to put all that data to work on an increasingly broad basis.
Intent based networking on the mainstream horizon
Network transformation has progressed in leaps and bounds, but it’s really only just begun. Our solutions architecture team has been actively evaluating intent-based network technology and we’re close to moving ahead. A few years ago, the advent of SD-WAN made separating the control and routing planes possible. Windstream SD-WAN Concierge allows customers to set their own routing policies, based on what SLAs are more important to their unique business needs (availability, jitter, latency, etc.). Providing our customers’ unprecedented network visibility and control, such as identifying which applications are using the most bandwidth, and prioritizing how that needs to change to deliver against business and customer experience objectives.
Now imagine if instead of asking customers to define how much jitter/latency is acceptable on circuit 1 prior to switching traffic to circuit 2, we asked them to more broadly define their ultimate intent. How much bandwidth does each site need? As well as when, and under what conditions? An intent based system intelligently identifies the appropriate parameters and configurations, and automatically re-routes their traffic. Truly zero touch this time, giving customers visibility without exposing too much complexity.
The future of networks is closer than you think
Today, our industry leading fully-managed SD-WAN Concierge solution has the intelligence to tell network/IT leaders which applications use the most of their bandwidth. Along with the power to make changes to how they access bandwidth based on that data. Tomorrow, with the addition of intent based network functionality, we will also be telling them where their network investment dollars went, and will automagically re-route their traffic to meet their intent. IT leaders (and those who determine IT budgets) want to know how much money their cloud applications are costing them every minute. And they want to use that information to influence that spend. It won’t be long until they can – the network as a platform has never been closer.
At that point, our network becomes a huge sensor, comprised of a large multi-dimensional data set with the ability to detect anomalies. A lot of interesting and hard to see relationships live in multi-dimensional data. So, every time any network element is misconfigured (which can happen on occasion) our network learns from it. Over time, it makes the best decisions given all the data it has collected, processed and computed. This is predictive analytics; the creation of SD-WAN policies based on machine learning.
This, fellow futurists, is the network and digital transformation our engineers at WE have embarked on. And we are closer than ever to delivering it!
Now if only I can figure out a way to explain this to my mother-in-law and her friends…
Discussions about SD-WAN often emphasize its general advantages compared to traditional data networking: lower cost, virtually zero downtime, and simplified expansion and updating. While those are benefits that SD-WAN adopters can expect, generalizations can give the impression that all SD-WAN implementations are alike, a one-size-fits-all solution.
As I’ve written previously in this space, that is far from the case for mid-market enterprises seeking maximum value from SD-WAN.
That’s because gaining full benefit from SD-WAN inevitably requires that it be tailored to an organization’s unique networking needs. This is especially true of mid-market enterprises, where one organization’s needs can stand in stark contrast to those of another similarly sized, yet fundamentally different, organization.
Fortunately, one of SD-WAN’s primary benefits is flexibility, which mid-market customers can use to great advantage.
Start with your needs, not the solution
Because SD-WAN is software-defined, it offers optimization that isn’t as easily achieved with hardware-defined, on-premises WAN solutions. SD-WAN is inherently more capable of being what it should be, and that’s one of its greatest values.
In an article I recently wrote for CIOReview, I compared three mid-market SD-WAN use cases. One of them, which reflects a relatively common implementation, is that of a restaurant chain with 50 locations throughout the country and projections for steady growth ahead. Some of the primary SD-WAN needs associated with such a customer include:
If your own organization is highly similar, the SD-WAN solution described in the use case as meeting these needs might be perfectly suitable for you.
But what if your organization is not expecting significant growth? If rapid scalability isn’t required, emphasis is better placed on more pressing factors.
What if your organization doesn’t handle credit card payments? It will still have security needs, which can range from basic to more stringent due to the requirements of the industry it serves – how are those security needs best served?
What if your organization needs either more or less download speeds across locations? Is streaming video an essential part of what you do? Does the need for download speed vary widely, such as 50 Mbps at headquarters, 20 Mbps at regional centers, but minimal bandwidth at remote locations?
In the use case example of a restaurant chain, locations are typically within urban areas served by robust telecom infrastructure. What if some of your locations are in markets where infrastructure is less robust?
These are just some of the many factors that must be taken into account for SD-WAN optimization.
Needs assessment is the starting point
The need for customization is one reason so many organizations grow to value a managed service vs. a do-it-yourself approach the further they get into it – skilled tailoring usually proves to be essential.
Because simply put, if there were a one-size-fits-all “SD-WAN in a box” available for purchase by mid-market enterprises, it would prove satisfying to at best a slim minority of those who purchase it – and would disappoint a great many others. That’s because the starting point of an optimized solution isn’t SD-WAN itself.
The most appropriate starting point is a thoughtful and informed needs assessment driven by an SD-WAN supplier that is highly sensitive to the many ways in which this remarkable technology can be best fitted to the uses that will be expected of it. If you choose this path, you’re off to a great start in the transition to SD-WAN.
Wouldn’t it be nice if everything was Plug and Play? We all crave that kind of simplicity in our lives, but sometimes simplicity leads to oversimplification that becomes counterproductive. In the network space, we see this a lot with mid-market companies who would welcome the types of solutions geared for smaller organization but which just can’t seem to scale to their needs. At the same time, they often lack the resources of many larger enterprises who can more easily apply the time and money required to bring complex projects to fruition.
I’ve most certainly seen this in our ongoing development of SD-WAN solutions designed for mid-market needs, and in first hand discussions with IT leaders in such organizations. They know they need a new, cloud-ready, future friendly network architecture but they are pre-disposed to feeling exhausted by the concept of getting such a project underway.
With SD-WAN, one size fits all does not apply
A number of companies in the SD-WAN space seem to understand this mindset and there are no shortage of promises about how simple it can be to make the move. This can be quite a carrot to those companies that have reached the limits imposed on innovation and growth by their existing pre-Internet traditional network designs.
The problem is, while customers know they want SD-WAN, they are also pain and risk averse. So they are wary of false “one size fits all” promises some solutions imply. That’s actually smart when it comes to SD-WAN, where every implementation is going to be unique, since every company is unique, with different applications, legacy technology, goals and objectives, etc.
I did a profile of a few such companies in a piece I wrote recently for Channel Vision Magazine, which details the dramatically different needs of several different kinds of companies. Whether you are a channel partner or potential mid-market SD-WAN customer, it offers a good picture of how to evaluate SD-WAN solutions to best suit your unique specific current and future needs.
This sort of insight is what led our team at Windstream to launch a fully-managed SD-WAN solution where our own expert team works with each customer to plan, implement, manage, monitor and optimize the solution to achieve the highest degree of success.
It can also be helpful to work with a channel partner or a network service provider that offers a range of professional services, including the ability to do a comprehensive review of the company’s technology needs and business strategy prior to even talking about possible solutions. While the answer to your own specific needs may not always be a simple one, this approach does promise to make life a bit easier for those in IT as they plan their network evolution to adapt to a cloud and mobile centric future.
Over the past 12 months the buzz around SD-WAN has exploded. It’s becoming to networking what the Cloud has become to infrastructure and applications. Yet, while the concept of a Software Defined WAN is generally understood, it’s often confused with its technology parent, Software Defined Networking (SDN). So I thought it was about time someone explained the difference.
SD-WAN & SDN: similar in many ways, starting with the “SD”
Both SD-WAN and SDN have a common heritage, beginning with the separation of the Control Plane and the Data Plane. Both are designed to run on commodity x86 hardware, both can be virtualized, and both support the integration of additional Virtual Network Functions (VNFs) such as security, or WAN acceleration.
SDN was built to support the modern computing needs found in Local Area Networks (LANs) as well as in Service Provider networks (for example, by our company to deliver wavelength services). The goal was to develop dynamic, flexible, scalable connectivity to support changing demands in the DC (data center) and on core networks. SDNs are directly programmable, providing an agile centrally managed platform that decouples the Control Plane – decisions about where traffic is routed – from the Data Plane – which determines how traffic is forwarded.
These same underlying principles also power SD-WAN. That said, SD-WAN and SDN are definitely not the same thing.
SD-WAN vs. SDN: Understanding the differences
Like many relatives, SDN and SD-WAN look a good bit alike, but you often find that, whereas the pear never falls too far from the tree, some pears may develop a different taste/color. To start with, SD-WAN focuses on providing software defined application routing to the WAN, or Wide Area Network, and on connecting an organization’s geographically distributed locations (headquarters, data centers, branch offices, remote and mobile users), on a national or global basis. While on the other hand, SDN is primarily focused internally, within the LAN (locally) or within the Service Provider’s core network.
There are a number of other essential differences, including:
SD-WAN takes you from packets to apps, and beyond
The technology behind SD-WAN changes the paradigm from a packet based network routing system to an application based routing system. This enables organizations to use consumer grade broadband Internet with improved quality and performance, and importantly, a lower cost per megabyte than previously available with MPLS.
SD-WAN also provides agility and flexibility, while maintaining centralized, pre-defined business policies controlling how applications get routed. The resulting visibility and control it provides allows you to identify applications running across the WAN and set policies on their prioritization and use.
SD-WAN also uses dynamic WAN selection to route those apps over the best performing pathways. In addition, SD-WAN lets you use multiple available links in an “active/active” configuration to provide load balancing and failover, with little-to-no perceived interruption. Traffic between sites flows over dynamic, fully encrypted tunnels and can be segmented, providing for a high level of security.
All “SD” driven technologies are not created equal
While it may have previously seemed confusing, as noted above, SD-WAN removes the complexity from the end user, providing an easy to use set of tools and analytics for network management.
Of course, while this may make it sound easy, leading some organizations to decide to implement SD-WAN on their own, there are benefits to leveraging an experienced service provider to help you get the most out of your implementation. Especially if you need to integrate SD-WAN into an existing private or hybrid network. To do that, you’ll need a strong knowledge of your network and how associated services (voice, video, WiFi, etc.) are configured, and how they collectively may impact your security model. These are the sorts of things a knowledgeable provider can help you with, among others.
Now that we’ve taken a bit of the mystery out of the differences between SD-WAN and SDN, you’ll be more prepared than ever to begin moving your organization towards digital transformation empowered by SD-WAN.
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