I am planning to upgrade my WLC 4402-50 (HA) to WLC 5508-250 (HA). I also have some really old 1020 Access points that I will be replacing with 1142's. Once I have completed the upgrade to the 5508s, I will repurpose the 4402's as Mobile Anchor controllers to support Guest Wireless.
Does anyone have any actual experience with this sort of upgrade? Any practical suggestions or ideas??