Hi @ Rossana40
Take into consideration that the Access Points connectivity depends on the ISP router, so the new router must be connected to the ICX 7150 Switch, I will add a guide, so you can check some examples for the connections, now if you have confirmed that the connectivity coming from the ISP router, however when you are connected to the Wi-Fi coming from the Unleashed Access Points the connection it's too slow, it looks like your Switch (ICX7150 Switch) may be booting from the wrong partition, let me add the guide to fix the issue.
Note: if you have access to the Unleashed Dashboard and the Switch can be seen from there, it may look like the following image, ICX7150-C12-Router instead of ICX7150-C12-Switch, now before starting the steps of the guide, I will advise you to cable the computer directly to the Switch since you will have better connectivity than if you connect via wireless.
1:Check the connections:
Most common Setups for Lennar homes users
2:IF all is connected properly but the connection to the Unleashed access points is slow, however, the ISP router works fine, please follow up on the next guide.
How to Fix Routing code issues on Lennar Home users via Web GUI.
How to Fix Routing code issues on Lennar Home users via CLI
Technical Support Engineer | L2 TAC Wired | Lennar Home Community