Overlay Network
Overlay Network
- A virtual network topology used to connect devices, built over an Underlay Network in SD-Access.
- When combined with the Underlay network, it forms the Fabric
- LISP is the protocol that provides control of the Control Plane
- VXLAN (Virtual Extensible LAN) is used for the Data (Forwarding) Plane
- Cisco TrustSec (CTS) is used for the policy
- Each technology has been optimized for SD-Access