We cannot publish roadmap type of info in this forum. I would suggest you reach out to your local SE and ask for an update.
As for the bandwidth limitation there are also changes on the horizon on the wired side with things like 2.5G and 5G ethernet...
Amarin yes you can have different platforms in the mobility domain.
Paulo,
No that is not possible. Each controller can only be paired to one other controller not 2 as you are describing.
Also you can only have a max of 1000 APs adopted to the cont...
The max is 2 controllers in a pair but you can create a mobility domain and group pairs of controllers together. The current recommended limit is 12 controllers or 6 pairs.
Yes you can have the controllers at different physical locations but you ne...
Ekahau has a free tool called Heatmapper. Designed for homes so it's limited on how many APs can be placed on a map. Then Inssidr from meta geek will give a good visual of signal levels as you walk around but dosnt do maping. There is a good tool ...
