I have got three fancy new UAP-AC-PRO units and I needed to get these across a layer 3 network. My controller actually sits at another site, and I wanted to have a single controller VM with a wide workload of APs around the buildings.
Setting up the layer 3 is actually quite simple:
1. Get the AP an IP a DHCP IP that has routing/comm capabilites with the controller.
2. SSH into the AP and issue:
3. Log into the controller and adopt the AP.
4. SSH back into the AP and issue:
The controller will adopt the new AP’s. You get less VMs to manage.