Invalid FTE - Fast Transition Element

[AshMead]

We are getting a lot of Invalid FTE errors when roaming.

802.11 reason Code 51

we have MR56. Clients are using 802.1x authenticating via ISE.

Other clients appear to have no issues.

Has anyone seen this before?

[GIdenJoe]

The issue clearly has to do with 802.11r fast transition information elements.
Or: one type of client has issues and you'll need to see if there is a certain client type that has this issue.

Or: there is a firmware bug in the AP that falsely flags these IE's as invalid.