RB4011
Which one?
The one without built-in WiFi, or
the one with it? You can see how we might be confused when you bring up WiFi but then talk about Ethernet ports.
ether 2 LAN (192.168.2.1) / ====== CRS328
You really should use the SFP+ ports for this, to get a 10G link between them. Even if your Internet connection is gigabit or slower, you'll benefit from aggregating the RB4011's ten GigE ports into a single 10G link back to the core switch, the role your CRS328 is best suited for.
emit a wifi zone
I don't know what that phrase even means. What is emitting in this instance, and what is a "wifi zone"?
I can guess, but I'd rather you try rephrasing it.