Cisco DTLS License
The whole area around the free DTLS license that can be obtained for Cisco WLCs has always been a bit of a head-scratcher for me. I'm never sure whether I need the additional license or I already have it to be honest. Anyhow, today on my home lab I tried to have a look at some features which required DTLS between the AP & WLC, only to find that my 2504 did not support the option (the option was grayed out). After some digging around on the Cisco forums, I found that the following licensing link can be used to obtain the DTLS entitlement license with very little fuss at all: https://tools.cisco.com/SWIFT/LicensingUI/loadDemoLicensee?FormId=4090 The information to be entered can be found on the WLC inventory page. Only the model number & serial number are required. Within seconds, I had the license (which can be downloaded directly or sent by email) and applied it to my 2504 (Management > Software Activation > Commands > Install License)