At IE, our wireless practice engineers often are called on to troubleshoot a network that’s gone awry, for some unknown or unforeseen reason, resulting in a negative impact to the business. The WLAN has been run through multiple support calls and RF surveys to show that good RF signal exists and the RF cell is stable. Vendor support centers may have been contacted, but with little to no actual onsite visibility, the vendor online support engineer has no real way to identify the issue. Quite often of late, this has been the result of a change to the network that may’ve been intended to improve the behavior of one client’s device at the cost of older legacy devices on the network. One, or multiples of, new Institute of Electrical and Electronics Engineers (IEEE) standards have been engaged and legacy client devices are suffering. These standards are varietal configurations of 802.11r, k, v, and w. I will briefly describe what each of these IEEE roaming and protection standards is and how they could potentially cause issues with your WLAN client devices.