Hi Ricardo,
Just to add a clip to the good info from David and Larry (5 points to both of you!);
A mobility group can include up to 24 controllers of any type. The number of access points supported in a mobility group is bound by the number of controllers and controller types in the group.
Examples:
1. A 4404-100 controller supports up to 100 access points. Therefore, a mobility group consisting of 24 4404-100 controllers supports up to 2400 access points (24 * 100 = 2400 access points).
2. A 4402-25 controller supports up to 25 access points, and a 4402-50 controller supports up to 50 access points. Therefore, a mobility group consisting of 12 4402-25 controllers and 12 4402-50 controllers supports up to 900 access points (12 * 25 + 12 * 50 = 300 + 600 = 900 access points).
From this good doc;
http://www.cisco.com/en/US/docs/wireless/controller/4.0/configuration/guide/c40mobil.html
Hope this helps!
Rob
