Infrastructure nodes are the physical machines that run all required services for the MCP cluster deployment, lifecycle management, and monitoring, also known as control plane services.
The exact number of the infrastructure nodes in each MCP environment and distribution of the MCP components across the infrastructure nodes depend on the use case and are defined in the deployment model.
The MCP Cloud Provider Reference Configuration requires 9 infrastructure nodes to run control plane services. See OpenStack compact cloud for details.
Note
You can use either Neutron or OpenContrail SDN, but not both at the same time.