Question : How do I configure DHCP for two WLAN's on Cisco 2100 Wireless LAN Controller?

I have a Cisco 2100 Wireless LAN Controller with three Cisco 1130 Lightweight Wireless Access Points. I have two WLAN's configured on this wireless system, with one being on the same VLAN/Subnet as the rest of the network (private), and the public side being on VLAN 20 (public). Two of the AP's are connected directly to the WLC, while the third is connected to a Cisco switch.

I'm trying to get DHCP configured on both WLAN's. It's working on the private side, but not on the public side. I've double-checked my configs and made sure there's communication between the access points, DHCP server, and WLC using ping. There are no access control lists implemented currently. My question is, do I need to put the public WLAN interface on a different physical port than the management (private) interface? As it is, I have both VLAN's/subnets going through the same physical port and only the management (private) interface is pulling DHCP IP addresses. I am currently using a Sonicwall to supply DHCP addresses.

Answer : How do I configure DHCP for two WLAN's on Cisco 2100 Wireless LAN Controller?

Do you have port groups and trunking configured on your WLAP devices?

I do not have the WLC but my units are in autonomous mode and I config'd them for trunking to move devices to the corporate or guest vLAN after authentication.

is this how yours is configured?