VX9000 not able to access NSiGHT after upgrade to any version equal or higher than 5.9.4.x
Once you perform the upgrade to any version higher than 5.9.4 (this one included) in an adopting VX9000 controller running the NSiGHT server,UI NSiGHT option to open the server is not available. Also, if you try the url https://serverIPaddress/nsight-ui is not working.
ExtremeWiNG Access Points
WirelessWiNG Acess Points
WiNG v5.9.4.x Software
WiNG v5.9.3.x Software
As per the 5.9.4 release notes:
If NSiGHT server running on that appliance needs to be recovered, the best option is to revert the downgrade to the previous running firmware version until a new standalone NSiGHT image is deployed in a new instance, then the upgrade to any version 5.9.4.X or higher, on the adopting VX9000, can be performed.