We have upgraded the IOS on Cisco 2924 switch, configured it for Tacacs, however the visual switch management using Netscape for the above switch doesn't work. Any ideas?

We have upgraded the IOS on Cisco 2924 switch, configured it for Tacacs, however the visual switch management using Netscape for the above switch doesn't work. Any ideas?

Does Cisco support Radius on the following devices:2912,2924,2950,2600,3524,3548,4000 ?and if so what version of IOS do I need to have?