The hype over the deployment of Software Defined-WAN technology and services is quickly becoming something more so far this year.
Just this week EarthLink announced a partnership with SD-WAN vendor VeloCloud to offer a managed WAN-SD service. And recentlyverizon.teamed with SD-WAN purveyors at Viptelato offer SD-WAN services. Also this month another SD-WAN player -- CloudGenix -- announced a partner program to build out its SD-WAN offering to the masses. AT&T and other players are in on the managed SD-WAN service world as well.
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In March researchers at IDC said that 30% of enterprises plan to migrate to SD-WAN within two years and that the overall market would be worth $6 billion by 2020. Gartner too sees big things for the technology saying by year-end 2018, 10% of enterprises will have replaced their WAN routing with some iteration of hybrid-WAN-based technology.
While adoption is clearly growing there are of course still some challenges in getting SD-WAN technology into the enterprise.
例如，当他们的T-1S和MPLS的当前系统正常工作时，它们可以有一个相当令人信服的网络执行，即他们需要新技术和服务。
But there are plenty of issues driving the pick-up of SD-WAN technology as well.
Cisco’s Kailem Anderson, managing director of Cloud & Managed Services, observed in a博客帖子this week a few key reasons enterprises might look to SD-WAN services. He wrote:
- Oversubscribed MPLS circuits in the enterprise: Estimates indicate that enterprise WAN utilization is typically in the 30% to 40% range, resulting in severe circuit wastage.
- Traffic bursts: Short bursts of intense traffic can degrade the performance for everyone.
- A silo-based approach to addressing WAN management: Solutions such as WAN optimization, application delivery controller, routers, and security devices are widely deployed today but only solve part of the problem.
- Management silos: Historically, different groups perform all of the management functions separately, such as visibility, performance, monitoring, optimization, and analytics. This can lead to long troubleshooting times and inefficient capacity planning.
“The rapid increases in the number and variety of devices connecting to corporate networks—along with other trends such as bring-your-own-device (BYOD) environments, guest access, and the Internet of Things (IoT)—all add to these bandwidth demands that IT departments are trying to address,” Anderson wrote. “As a result of all this flux, application bandwidth at branch offices has become a major topic for many businesses. Factors affecting branch application bandwidth include application performance as newer applications consume more bandwidth and escalating carrier costs incurred when purchasing additional connections.”
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“网络连接越击，因为分支机构的现有带宽不足以实现流量速率。然后交通堵塞随之而来，用户抱怨（当然，当然）慢慢和降级的性能。Anderson写道，所有这一切都表明了市场上的趋势点，这是对杂交万的势头。
Beyond the bandwidth, security of WAN connections is an issue that SD-WAN can address experts say.
“段落端到端部件的能力，支持加密和认证是SD-WAN服务的所有关键组件，”Viptiela产品管理副总裁Ramesh Prabagaran表示。然后可以应用要管理特定段的策略来控制访问特定位置。客户还可以更轻松地将一部分攻击发生攻击。Prabagaran说，这些特征尤其是金融和医疗保健企业的关键。
Better automation features will also be a key driver of SD-WAN deployment. For example Verizon envisions its managed SD-WAN service will be able to detect when it needs more bandwidth and automatically turn it up. It will be able to back it off if necessary said Viraj Parekh, director of product and new business initiatives at Verizon. “We expect to be able to do that by the end of the year,” he said.