RRM works by monitoring a number of APs and working out optimal RF settings for each one. The APs that are included in the RRM algorithms are contained in a single RF group. An RF group is formed for each band that is supported—one group for 2.4-GHz AP radios and another for 5-GHz AP radios. By default, an RF group contains all the APs that are joined to a single controller.
You can also configure a controller to automatically populate its RF group. In that case, the RF group can expand to include APs from multiple controllers, provided the following two conditions are met:
The controllers share a common RF group name.
At least one ...