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Achieving Business Continuity With SD-WAN

Traditional WAN vs Software-Defined WAN (SD-WAN)

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vs

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.

SD-WAN

A software-defined wide area network (SD-WAN) is a wide area network that uses software-defined network technology, such as communicating over the Internet using overlay tunnels which are encrypted when destined for internal organization locations. 

An SD-WAN can connect several branch locations to a central hub office. Because it is abstracted from hardware, it is more flexible and available than a standard WAN.

 SD-WAN Benefit

Improve Performance

SD-WAN can be configured to prioritize business-critical traffic and real-time services and effectively steer it over the most efficient route. SD-WAN improves cloud application performance by prioritizing business-critical applications

Simplifying IT Infrastructure

SD-WAN can ease the IT burden by simplifying WAN infrastructure, using broadband to off-load non-critical business apps, automating monitoring tasks, and managing traffic through a centralized controller

Boost Security

SD-WAN solutions offer built-in security such as NGFW, IPS, encryption, AV, and sandboxing capabilities that can help prevent data loss, downtime, regulatory violations, and legal liabilities

Reduce Cost

SD-WAN can reduce this price tag by leveraging low-cost local Internet access, providing direct cloud access, and reducing the amount of traffic over the backbone WAN

SD-WAN vs MPLS

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Parameter

Complexity

Visibility

Cost

Performance & Availablity

SD-WAN

Simplifying WAN infrastructure, , using broadband to off-load non-critical business apps, automating monitoring tasks, and managing traffic through a centralized controller.

MPLS

Broad application visibility

Consolidated services greatly reduce TCO

Enables MPLS, broadand, LTE for high-speed

Internet traffic backhauled to the data center

Packet routing limits visibility

Expensive to build and maintain

MPLS offers limited bandwidth and single point of failure

SD-WAN vs VPN

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Parameter

SD-WAN

VPN

Cost

Higher cost as it needed cost for Central Management (optional)

Cheaper

Maintenance

Offer scalability and flexibility

- Require more maintenance and work

- Require more level of expertise

- Difficult for additional site maintenance

Performance & Bandwidth

Offer dynamic path selection, Quality of Service and application aware routing

Generally, experience considerable latency due to distance between sites and spikes in congestions that affect performance

Reliability

Offer secured system, failover security feature, Automatically fix a service failure or outage

- Offer secured system

- DOES NOT offer failover security feature

- DOES NOT automatically fix a service failure

   or outage

Overall Benefit

- More seamless user experience by minimize packet loss

- Support for employees work from anywhere

- Offer Network connection flexibility (Broadband, Dedicated

   Internet, MPLS)

Support for Dedicated Internet Access

 SD-WAN Features

SD-WAN Element

Efficiently processing routing and security functions at scale.

SD-WAN Element

Path remediation and automatic failover keep traffic from being disrupted

SD-WAN Element

SD-WAN know the business relevance of an application and prioritize it appropriately.

SD-WAN Element

Can be managed on a single screen with high visibility

SD-WAN Element

Utilizes automated path intelligence to ensure applications always optimal.

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