The software defined access fabric is the overlay network, providing policy based network segmentation, host mobility, and enhanced security beyond the normal capabilities of a traditionally switched network.
The software defined access overlay is fully automated regardless of the underlay mode used. It automatically includes all overlay control plane protocols and addressing required.
The Cisco software defined access fabric is based on multiple technologies that already exist.
The combination of the technologies and the automation by DNA centre make it a unique implementation.
There are three planes within Cisco SD-Access, the control plane, data plane, and policy plane.
Control Plane – Baed on Locator/ID Seperation Protocol
Data Plane – Based on Virtual Extensible LAN (VXLAN)
Policy Plane – Based on Cisco TrustSec