I have all my WLC's at V4.0.217 and they seem to be running fine. Now I need a more recent version to support non-expiring Guest accounts on my anchor controller. SO I do need minimum a V4.1.sth or higher . What is the most recent GD or most stable version ?
Second question: if I only upgrade the anchor controller to let say V4.1.185 will the remote controllers still at V4.0.217 have no problems with this ?
Thanks in advance.