I would like to know if you are Lennar home user , since some times the switch is running routing code (SPR08095d) (L3) and for this type of setups and configuration ( since you already have a Router on your regular setup ) , it has some troubles for the connectivity for home users.
As I can see you are having troubles adding the ICX to the unleashed dhabsoard, I will share with you some guides to follow up
1-Made sure that the ICX is in the same subnet ( network) as the APs run a
ICX7150-48P #show ip address
3-ICX configuration and steps:
4-Please ping the ICX from the unleashed dashboard I believe is in
Admin & Services > Administer >Diagnostics> Network Connectivity page.
Some tips I can give you is to run the following commands:
ICX7150-48P (config)#Crypto key generate
ICX7150-48P (config)#Username admin password admin
ICX7150-48P (config)#aaa authentication login default local
Then in the unleashed dashboard you have to go to switches and use the same credentials you ran as the example admin/admin
I hope this helps !!