Appendix B
Software-Defined Access with Wireless
Campus networks have traditionally been built upon the three-layer architecture of access, distribution, and core. Over time, many large campus networks have added virtualization, employing technologies such as Multiprotocol Label Switching (MPLS), Generic Routing Encapsulation (GRE), and others that allow overlay segmentation of traffic into virtual private networks (VPNs).
Software-Defined Access (SDA) is a Cisco technology that is an evolution of the traditional campus network that delivers intent-based networking (IBN) and central policy control using Software-Defined Networking (SDN) components.
SD-Access is built upon the following three network-centric pillars:
A network fabric: The network ...
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