The Purpose of a Control Plane Node in a Cisco SD-Access Network Fabric

B.

In a Cisco Software-Defined Access (SD-Access) network fabric, the control plane node serves an important purpose in managing and maintaining the network. The control plane is responsible for controlling the communication and coordination between different devices and network components in the network fabric.

Answer A: The control plane node maintains the endpoint database and maps endpoints to edge nodes. Endpoints are devices or hosts that connect to the network fabric, and edge nodes are the devices that connect endpoints to the fabric. The endpoint database is used to keep track of all the endpoints connected to the fabric and their corresponding edge nodes.

Answer B: The control plane node also detects endpoints in the fabric and informs the host tracking database of EID-to-fabric-edge node bindings. EID (Endpoint IDentifier) is a unique identifier assigned to each endpoint in the fabric. The host tracking database maintains the mapping between EIDs and fabric-edge nodes, which is used to direct traffic between endpoints and edge nodes.

Answer C: The control plane node identifies and authenticates endpoints within the network fabric. This helps to ensure that only authorized devices are allowed to connect to the fabric and communicate with other devices in the network.

Answer D: The network gateway is typically a separate device in the network that connects the network fabric to outside networks. The control plane node is not responsible for acting as the network gateway.

Overall, the control plane node is a critical component of a Cisco SD-Access network fabric that helps to maintain endpoint databases, detect endpoints, authenticate devices, and coordinate communication between different devices in the network.