You can complete a set of steps to manually disable the overlay communication between multiple cells.
Typically, you enable the overlay communication between multiple cells when you configure multi-cell performance management in a star topology. Each cell contains a overlaynodes.config file, and the files must be copied between the cells to enable multi-cell performance management. You can manually disable the overlay communication by completing the steps in this topic. As an alternative, you can run the unlinkCells script, which is described in another topic, to disable the overlay communication.
For example, assume that you set up a star topology in which three cells are running, and that you want to disable communication between certain cells without disrupting service to the other cells in the environment. CellA is the center cell, and CellB, and CellC are the point cells. Complete the following procedure to manually disable communication between CellA and CellB while maintaining communication between CellA and CellC.