Chapter 25 AAA
25.1.2on page 222) as external authentication, authorization and accounting servers.
Figure 117 AAA Server
Client | AAA Server |
25.1.1 Local User Accounts
By storing user profiles locally on the Switch, your Switch is able to authenticate and authorize users without interacting with a network AAA server. However, there is a limit on the number of users you may authenticate in this way (See Chapter
33on page 297).
25.1.2RADIUS and TACACS+
RADIUS and TACACS+ are security protocols used to authenticate users by means of an external server instead of (or in addition to) an internal device user database that is limited to the memory capacity of the device. In essence, RADIUS and TACACS+ authentication both allow you to validate an unlimited number of users from a central location.
The following table describes some key differences between RADIUS and
TACACS+.
Table 65 RADIUS vs TACACS+
| RADIUS | TACACS+ |
Transport | UDP (User Datagram Protocol) | TCP (Transmission Control Protocol) |
Protocol |
|
|
|
|
|
Encryption | Encrypts the password sent for | All communication between the client |
| authentication. | (the Switch) and the TACACS server |
|
| is encrypted. |
|
|
|
25.2 AAA Screens
The AAA screens allow you to enable authentication, authorization, accounting or all of them on the Switch. First, configure your authentication and accounting server settings (RADIUS, TACACS+ or both) and then set up the authentication priority, activate authorization and configure accounting settings.
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