Dell S4148F OS 10 Switches. Help with authentication methods?

Hey All

Coming here for some help since DELL doesn't seem to have any idea (fruitless support case) They've asked me to email my questions to escalate to engineering........

We recently bought some S4148F Switches, and here's what we're trying to do and questions I have - any help is appreciated:

 

Goal: Configure RADIUS authentication for switch management

 

Issue: Switch is remote to me, so if I configure my NPS server incorrectly, I won’t be able to access it again without travelling a distance to physically access it.

 

Questions:

• Is RADIUS configuration an “all or nothing” type of configuration?
• Can RADIUS be configured for TELNET separately from SSH? (IE. Configure RADIUS for TELNET while leaving SSH available for local login like HP switches can do?)
• If RADIUS is configured, does LOCAL login (IE admin or manager accounts) still work remotely?
• IF admin account still works remotely as asked above – can that local login be disabled?
• What are the commands to do these things? Documentation is sparse, and the documentation for OS10 seems to not work anyways.

Thanks!