From the course: Cisco Networking Foundations: Wireless Networks, Services, Security, and Virtualization

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Software-defined wide area networks (SD-WANs)

Software-defined wide area networks (SD-WANs)

From the course: Cisco Networking Foundations: Wireless Networks, Services, Security, and Virtualization

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Software-defined wide area networks (SD-WANs)

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- [Instructor] Now that we understand a bit about SDN, Software-Defined Networks, in this video we want to talk about Software-Defined Wide Area Networks or SD-WANs. First, consider traditional WAN connections. If we had a couple of remote sites like BR1 and BR2, and then we had a headquarters and that's where the data center lived, traditionally, our remote sites had to go back to the headquarters, and they might do that over a variety of WAN technologies like NPLS or Metro Ethernet but they had to go back to the headquarters so they could access the data center and get access to the applications being used by the enterprise and to make sure our communication was secure. And this did give us a secure, predictable performance. One challenge with this traditional WAN topology though is that if BR1 or BR2 wants to go out to the internet using an application they had to do something called backhauling where their communication…

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