Hello, this should have been posted in the wireless section. There are 512 dynamic interfaces that can be supported on the WLC, please see below:
Dynamic Interfaces on WLCs
Dynamic interfaces, also known as VLAN interfaces, are created by users and designed to be analogous to VLANs for Wireless LAN clients. A controller can support up to 512 dynamic interfaces (VLANs). Each dynamic interface is individually configured and allows separate communication streams to exist on any or all of the distribution system ports of the controller. Each dynamic interface controls VLAN and other communications between controllers and all other network devices, and each acts as a DHCP relay for wireless clients associated to WLANs mapped to the interface. You can assign dynamic interfaces to distribution system ports, WLANs, the Layer 2 management interface, and the Layer 3 AP-manager interface. You can also map the dynamic interface to a backup port.
http://www.cisco.com/image/gif/paws/68100/wlan_controllers_vlans.pdf
Hope this helps
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