SDN Flashcards
SDN centralizes the control plane into an application called a _____
controller
What are the three layers of SDN architecture?
- Application layer
- Control layer
- Infrastructure layer
What is the purpose of the SDN application layer?
Contain scripts/applications that tell the SDN controller what network behaviors are desired
What is the purpose of the SDN control layer?
Receive and process instructions from the application layer
What is the purpose of the SDN infrastructure layer?
Holds the actual network devices that are responsible for forwarding messages across the network
What is Cisco’s solution for automating campus LANs?
SD-Access
Cisco DNAC is the ____ for SD-Access
Controller
The ____ is the underlying physical network of devices and connections which provide IP connectivity
Underlay
The _____ is the virtual network built on top of the physical underlay network
Overlay
The _____ is the combination of the underlay and the overlay; the physical and virtual network as a whole
Fabric
Describe what the SD-Access Underlay is
The underlying physical network of devices and connections which provide IP connectivity
Describe what the SD-Access Overlay is
The virtual network that is built on top of the physical underlay network
What does SD-Access use to build tunnels in the underlay?
VXLAN
Virtual Extensible LAN
What is the purpose of the SD-Access underlay?
Support the VXLAN tunnels of the overlay
What are the three diferent roles for switched in SD-Access
- Edge nodes
- Border nodes
- Control nodes