H-REAP has been designed (according to Cisco) for small branch deployments, where a WLC may not be justifiable. It does not appear to be designed to handle medium to large deployments (say, 25 to a few 100 APs). Limitiations are as follows:
* AP Groups: No limit specified but I have been able to add 200, which would be sufficient.
* WLANs: Up to 512 allowed which is sufficient.
* H-REAP Groups: Up to 20 groups of 25 APs. A reasonable number but not really enough.
* RADIUS Servers: Up to 17. As we use 2 x per site, that would allow 8 x remote site. Unfortunately not enough.
With manufacturers like Aruba supporting up to 8000 remote APs on their top WLC I would expect these limits to be higher on their flagship WLC. Can anyone suggest how to support a few dozen H-REAP sites with 10 - 75 APs each on the 5508.