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Cisco SD-WAN

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

Cisco SD-WAN is Cisco's software-defined networking solution for managing wide area networks through centralized control and overlay tunnels.

Cisco SD-WAN is Cisco’s software-defined networking solution for WANs. It separates the physical WAN underlay from a centrally managed virtual overlay, allowing the fabric to use diverse WAN connections. section 22.2.3 section 22.4

Core terms and behavior:

  • Builds an overlay of IPsec tunnels across any physical WAN underlay. section 22.2.3
  • Supports internet, MPLS, cellular 4G/5G, satellite, and other physical WAN transport options. section 22.4
  • Combines the physical underlay and virtual overlay into a network fabric. section 22.2.3
  • Uses several SDN controllers to manage the SD-WAN fabric. section 22.2.3

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Defines the underlay, overlay, fabric, tunnel type, and transport choices but stops short of configuration or controller-specific operation.
Examples
Illustrates the fabric with IPsec tunnels over internet, MPLS, cellular 4G/5G, and satellite connections.
What it assumes
Assumes familiarity with WANs and distinguishes physical underlay networks from virtual overlay networks.
What you can do after
Evaluate how Cisco SD-WAN combines centralized control, IPsec overlays, and varied WAN underlays.
How it connects
Connects software-defined networking with IPsec, overlay networks, underlay networks, fabrics, and SDN controllers.
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Related concepts

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.