We have just upgraded our C5210 wireless controllers to the latest version 10.31.01.0048. On the last version 10.21 we had an issue with the controller reporting properly in OneView with a guardian activated. GTAC informed us that this had been corrected in the next release (10.31)
After upgrading to 10.31 the wireless controllers are having even more issues with NetSight. In NetSight console the controllers keep losing contact. When I run a discovery they are seen and contact is established but then after 5 minutes they show as contact lost and do not come back. In OneView the APs are reporting but nothing else, clients or controller.