Cisco 3850 as a Wireless LAN Controller

Using 3850's as WLC is a relatively easy feat you just need the 3850 switch with IP Base or IP Services and finally a number of AP licenses equal to the number of access points. Remember that a single switch can have up to 50 access points, and a switch stack can have up to 50 APs as well.

Example part numbers might be:

WS-C3850-24T-S

LIC-CTIOS-1A

One thing that threw me initially on the data sheet is the below part number:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/data_sheet_c78-720918.html

L-LIC-CT3850-UPG

It bills it as an upgrade license so I assumed it was required to upgrade the switch enabling the WLC. This is not the case. This part is a top level part used to add additional licenses to an existing 3850 switch.