The core and controller are connected on the same vlan (lets say vlan 2, it's a .0 network subnet /27). The core IP address on vlan 2 ends in a .1, and I configured the svi for vlan 2 on the controller ends in a .11. The AP that works, is connected to vlan 2 and I can connect to the AP and the lab wireless network.
Now the distribution switch (lets say vlan 3 it's a .128 network subnet /27) can ping the controller, another switch on vlan 2, and the core. I configured the distribution switch as a DHCP server so the AP connected to vlan 3 can receive an IP address. The AP receives it's IP address, but the AP cannot communicate with the lms-IP on the controller.
I'm testing communication between controller and AP via pings to the core, another switch on vlan 2, and the distribution switch (vlan 3)
Yes, the controller can ping other devices on the same VLAN as the AP and the distribution switch (vlan 3) and the AP (when actual up) connected to vlan 3. The problem is the AP on vlan 3 stays up for 5 minutes and reboots.
FYI: In the lab I have a DNS server and ACS server all reachable from vlan 2 and 3.