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 * SD-WAN - Software-Defined WAN


WHAT IS SD-WAN?



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SD-WAN is a software-defined approach to managing the WAN.

Key advantages include:

 * Reducing costs with transport independence across MPLS, 4G/5G LTE, and other
   connection types.
 * Improving application performance and increasing agility.
 * Optimizing user experience and efficiency for software-as-a-service
   (SaaS) and public-cloud applications.
 * Simplifying operations with automation and cloud-based management.

 * Benefits of Cisco SD-WAN
 * Explore Cisco SD-WAN

 * Why Now?
 * Benefits
 * MPLS Vs SD-WAN
 * SDN Vs SD-WAN
 * Related Products
 * Resources

Contact Cisco
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 * Training & Certification





WHY NOW FOR SD-WAN?


THE TRADITIONAL WAN

The traditional WAN (wide-area network) function was to connect users at the
branch or campus to applications hosted on servers in the data center.
Typically, dedicated MPLS circuits were used to help ensure security and
reliable connectivity. This doesn't work in a cloud-centric world.


TODAY'S IT CHALLENGES

Times have changed. As businesses adopt the use of SaaS and
infrastructure-as-a-service (IaaS) applications in multiple clouds, IT is
realizing that the user application experience is poor. That is because WANs
designed for a different era are not ready for the unprecedented explosion of
WAN traffic that cloud adoption brings. That traffic causes management
complexity, application-performance unpredictability, and data vulnerability.

Further, opening the enterprise to the Internet and the cloud exposes major
threat and compliance issues. It is extremely challenging to protect the
critical assets of an enterprise when applications are accessed by a diverse
workforce, including employees, partners, contractors, vendors, and guests.
Enabling broadband on the WAN makes the security requirements more acute,
creating challenges for IT in balancing user experience, security, and
complexity.


THE NEW WAN

New business models drive the need for a new network model.

SD-WAN addresses the current IT challenges. This new approach to network
connectivity can lower operational costs and improve resource usage for
multisite deployments. Network administrators can use bandwidth more efficiently
and can help ensure high levels of performance for critical applications without
sacrificing security or data privacy.

 * Read blog post


WHAT ARE THE BENEFITS OF SD-WAN?

The traditional WAN architecture was limited to enterprise, branch, and data
center. Once an organization adopts cloud-based applications in the form of SaaS
and IaaS, its WAN architecture experiences an explosion of traffic accessing
applications distributed across the globe.

These changes have multiple implications for IT. Employee productivity may be
compromised by SaaS-application performance problems. WAN expenses can rise with
inefficient use of dedicated and backup circuits. IT fights a daily, complex
battle of connecting multiple types of users with multiple types of devices to
multiple cloud environments.

With SD-WAN, IT can deliver routing, threat protection, efficient offloading of
expensive circuits, and simplification of WAN network management. Business
benefits can include the following:

--------------------------------------------------------------------------------


BETTER APPLICATION EXPERIENCE

 * High availability, with predictable service, for all critical enterprise
   applications
 * Multiple hybrid active-active links for all network scenarios
 * Dynamically routed application traffic with application-aware routing, for
   efficient delivery and improved user experience
 * Improved OpEx, replacing expensive Multiprotocol Label Switching (MPLS)
   services with more economical and flexible broadband (including secure VPN
   connections)

--------------------------------------------------------------------------------


MORE SECURITY

 * Application-aware policies with end-to-end segmentation and real-time access
   control
 * Integrated threat protection enforced at the right place
 * Secure traffic across broadband Internet and into the cloud
 * Distribute security to the branch and remote endpoints with NGFW, DNS
   security, and NGAV

--------------------------------------------------------------------------------


OPTIMIZED CLOUD CONNECTIVITY

 * Seamless extension of the WAN to multiple public clouds
 * Real-time optimized performance for Microsoft Office 365, Salesforce, and
   other major SaaS applications
 * Optimized workflows for cloud platforms such as Amazon Web Services (AWS) and
   Microsoft Azure

--------------------------------------------------------------------------------


SIMPLIFIED MANAGEMENT

 * A single, centralized, cloud-delivered management dashboard for configuration
   and management of WAN, cloud, and security
 * Template-based, zero-touch provisioning for all locations: branch, campus,
   and cloud
 * Detailed reporting of application and WAN performance for business analytics
   and bandwidth forcasting

 * Read IDC report


MPLS VS SD-WAN

SD-WAN evolved from MPLS technology, which has powered private connectivity for
more than two decades. In many ways, SD-WAN can be seen as a software
abstraction of MPLS technology that's applicable to wider scenarios: It brings
secure, private connectivity that's agnostic to all kinds of links and providers
and is cloud-aware. While MPLS handled failure scenarios with backup links,
SD-WAN handles them with real-time traffic steering based on centralized policy.
Also, since SD-WAN unifies the entire WAN backbone, it delivers comprehensive
analytics across the network globally. This wasn't possible before, because of
disparate pieces of infrastructure and policy.





SDN VS SD-WAN

SD-WAN can be seen as SDN for the WAN. It represents, arguably, the most popular
and widely deployed use case in SDN. The SDN model became popular for
abstracting network infrastructure in the data center and other sections within
the enterprise perimeter. SD-WAN played a similar role but needed to abstract
infrastructure elements that were diverse in terms of link types, providers, and
geographies. Since it crossed the enterprise perimeter, it needed a robust
security component as well.





DEPLOYING CISCO SD-WAN


CISCO CATALYST SD-WAN

Extend intent-based networking across the branch, WAN, and cloud.


CISCO MERAKI SD-WAN

For lean IT teams, Meraki simplifies branch management and integrates threat
management.




RESOURCES

 * Gartner 2023 Magic Quadrant for SD-WAN
 * IDC MarketScape: Worldwide SD-WAN Infrastructure 2023 Vendor Assessment
 * Cisco SD-WAN Solution Overview
 * Cisco SD WAN benefits
 * Cisco SD-WAN blog
 * SD-WAN infographic
 * SD-WAN Security overview
 * Cisco SD-WAN Technology Alliances
 * SD-WAN white papers


YOU MAY ALSO LIKE…

 * Cisco Networking
 * Cisco Software-Defined Access
 * Intent-based Networking Explained
 * Networking Technology Trends
 * What Is an Edge Router?
 * What Is Multi-tenancy?
 * What Is Network Analytics?
 * What Is Secure Access Service Edge (SASE)?
 * What Is Virtualization?


 * Webinars
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