Recently, we've been encountering numerous errors on the 9800 WLC that are being logged in Cisco DNA Center.
One such error is "Client deleted due to invalid FTIE. Update client supplicant." This error seems to be occurring exclusively on Apple devices such as iPhones, Macs, and iPads.
Here are a few points regarding this issue:
1. How can I search for this error when accessing the WLC console?
2. Cisco bug ID https://bst.cisco.com/quickview/bug/CSCwa48648 doesn't seem relevant to our situation because we don't have "Roam Over the DS" enabled.
3. Thus far, we've only received complaints from one building in our environment. Searching the WLC logs would help me determine if this issue is occurring elsewhere.
