SD-WAN, or Software-Defined Wide Area Network, is a service formed by applying SDN technology to WAN scenarios. This service is used to connect enterprise networks, data centers, Internet applications, and cloud services across a wide geographic area, and is designed to help users reduce WAN expenses and increase network connectivity flexibility.
SD-WAN is a software-based network application technology applied to WAN transport connectivity that enables enterprises to consolidate and virtualize WAN connectivity and functionality into centralized policies that simplify the deployment and management of complex WAN topologies.SD-WAN is a collection of technologies whose main concept is to apply software-defined networking (SDN) techniques to the management of wide-area networks. networks.SDN uses virtualization technology to simplify the management and operation and maintenance of IT.
Second, the background of the emergence of SD-WAN
In the cloud computing, mobile applications, enterprise globalization has become the background of the environment, more and more real-time applications (off-site office, video conferencing, remote desktop, payment and transaction systems, telemedicine) to be delivered between multiple nodes, disconnection, slow access and other issues will amplify user dissatisfaction, resulting in transaction loss. The emergence of SD-WAN not only solves the problem of unstable Internet and expensive leased line, but most importantly, it can greatly satisfy the requirements of immediacy and real-time of these applications.
Third, SD-WAN application scenarios
The Tile Shop, a U.S. home life business, said Keith Hogie, CIO, "After using Citirx NetScalerSD-WAN with virtual desktops, the business staff and customers are able to communicate with each other. Virtual Desktop, the experience and interaction between business people and customers in the design studio is much better and meets customer expectations for digitization.
Mr. Wheeler, CTO of Sky TV, a New Zealand-based pay-TV company that broadcast the 2016 Rio Olympics over SD-WAN, said, "We're already seeing the difference that SD-WAN can make to the future of major sporting events. We've seen the difference SD-WAN can make to the future of large-scale sporting events.
Bjame Lund, Head of Infrastructure at the Danish AgriFish Agency, which uses SD-WAN to solve IT application problems faced by employees at sea, said, "NetScaler SD-WAN integrates multiple ways of connecting, so it's easy to use. NetScaler SD-WAN integrates multiple connections so that the control vessel can now use 3G/4G/LTE from four carriers and satellites at the same time, which is a huge increase in coverage.
Four basic features of SD-WAN solutions
Unified management and monitoring: SD-WAN integrates routers, firewalls, DPI detection, WAN acceleration, and other functions to ensure that enterprises truly realize the management and monitoring of applications.
Security:Data in transit can be protected by using IPSec or TLS/DTLS encryption to ensure data security.
Intelligent Path Control:When a link fails, the central console automatically switches links to ensure that the application can still continue to work while sending reports.
V. SD-WAN's cost-saving effect
SD-WAN optimizes the last mile of Internet connectivity, with the remote connection portion of the application performance bottleneck (the middle mile) being carried by the high-quality private network operated by the SD-WAN vendor, dramatically reducing the enterprise IT budget.
Centralized management system unifies the management of network access for corporate headquarters, data centers, and all branch offices, reducing IT staffing costs in branch offices.
Overall, with the same proportion of bandwidth, SD-WAN can save at least 30% of annual cost investment compared to MPLS.
Sixth, mainland China is currently operating more mature SD-WAN vendors
There are many mature vendors in the market, such as Aryaka, Algoblu, Pertino, Viptela, Versa, Velocloud, Huawei, etc., but lack of solution technology experience and maturity. However, there is a lack of SD-WAN operation service providers with mature solutions and technology experience. Personally, I recommend you to use Optical Union Group's landing SD-WAN program, they are currently using the vendor is the largest local vendor in China, Huawei SD-WAN products, and the company has accumulated more than a decade of MPLS technology and solutions for thousands of companies in Greater China to provide a stable and guaranteed network services. Their company's solutions are currently the most suitable operational service provider to carry out SD-WAN landing in mainland China.