Which node in the Cisco SD-Access fabric runs a host-tracking database?

The host-tracking database in the Cisco SD-Access fabric is maintained by the control plane node. This node is responsible for the centralized management and control of the overall fabric, which includes tasks like collecting and processing data from various edge nodes. The control plane handles the information about endpoints connected to the fabric, allowing it to track their location and status within the network.

In addition to managing the host-tracking database, the control plane node also facilitates communication between different nodes in the fabric, coordinating actions such as policy enforcement and network segmentation. This centralized approach enhances efficiency, ensuring that the network can quickly adapt to changes, such as a device moving to a different access point.

Other nodes, such as edge nodes, border nodes, and intermediate nodes, have roles focused on data forwarding and connectivity. They collaborate with the control plane but do not manage the host-tracking database themselves. Thus, the control plane node is essential for maintaining an accurate view of all the endpoints in the Cisco SD-Access environment.