I am running 8 -T301n ap's on a zone director 3025, but when i get 20 users on them the CPU in the unit shows it is running at 100% and the whole system bogs down, any suggestions
No it is the CPU on the T301 units, I am running 17 R700 units also through the same ZD (for a total of 25 ap's)They do not bottleneck the system. The units are connected back to the ZD via Fortigate 1 GB switches.
OR maybe some of your clients have high retry rates? Not sure grapsing at straws. Could maybe be a firmware issue, if your R700's have no issues, but your T301's do.