We have 2 WLAN Controller WS-C4110 with the current FW 09.15.05.0007. We wonder about the different colors at the Report "Active AP's", some are green, some blue, but in all cases on the Backup Controller (where the attached screenshot was taken) it look that it means that all AP's are not connected to the local Controller.
The description below does'nt really helps. Why should an AP, that is not local has some times a Backup connection (to this controller) and others not, but all are marked as "Foreign"?!?