Naganathan, any station that wants to communicate to a Radius server must be registered as a client in the Radius server. And for every client, the Radius server will have a shared secret (think of it as a password) to validate that the client i the correct one.
So, you will need two enter commands in the switch:
configure radius netlogin primary server 192.168.1.74 client-ip 192.168.1.4 vr "VR-Default"
configure radius netlogin primary shared-secret "
mysecret" (you can select a different one...)
And then you will need to add the switch as a client in NPS.
I nthe Windows server open
NPS, open
Radius Clients and Servers, select RADIUS Clients, right-click and select
New:
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In the New RADIUS Client form input the switch address (192.168.1.4) in the
Address field. Then enter the shared secret (
mysecret, or whatever you chose in the previous command) in the
Shared Secret and
Confirm Shared Secret fields. Press OK to save. The new client should appear in the clients list.
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Now the switch and the Radius server are ready to talk to each other.