TP-Link T1600G-18TS Configuration Manual page 613

Configuring Network Security
Choose the menu Network Security > AAA > Method List to load the following page.
Figure 7-7 Add New Method
There are two default methods respectively for the Login authentication and the Enable
authentication.
You can edit the default methods or follow these steps to add a new method:
1) In the Add Method List section, configure the parameters for the method to be added.
Method List Name
List Type
Pri1- Pri4
2) Click Add to add the new method.
Specify a name for the method.
Select the authentication type. The following options are provided:
Authentication Login and Authentication Enable.
Specify the authentication methods in order. The method with priority 1
authenticates a user first, the method with priority 2 is tried if the previous
method does not respond, and so on.
local: Use the local database in the switch for authentication.
none: No authentication is used.
radius: Use the remote RADIUS server/server groups for authentication.
tacacs: Use the remote TACACS+ server/server groups for authentication.
Other user-defined server groups: Use the user-defined server groups for
authentication.
AAA Configuration
Configuration Guide 590