# Configuring AAA

You can configure the Authentication, Authorization and Accounting (AAA) using the following command:

#### Reference

<table data-header-hidden><thead><tr><th></th><th></th><th data-hidden></th></tr></thead><tbody><tr><td>Command</td><td>[no] aaa authentication (failthrough disable | fallback disable |login tacacs)</td><td></td></tr><tr><td>Description</td><td>AAA configuration</td><td></td></tr><tr><td>Parameters</td><td>None</td><td></td></tr><tr><td>Mode</td><td>CONFIG</td><td></td></tr></tbody></table>

#### Example

<pre><code>pbnoscli# configure terminal 
<strong>pbnoscli(config)# aaa authentication 
</strong>  failthrough           Configure failthrough, default : enable
  fallback              Configure fallback, default : enable
  login                 Configure login, default : local
pbnoscli(config)# aaa authentication failthrough disable
pbnoscli(config)# aaa authentication fallback disable
pbnoscli(config)# aaa authentication login tacacs
pbnoscli(config)#
</code></pre>

You can verify the configuration by using the command(s) below:

```
pbnoscli# show aaa authentication 
================================
Type            Value          
================================
Failthrough        Disabled          
Fallback           Disabled    
login              tacacs   
pbnoscli#
```

```
pbnoscli# show running-config 
configure terminal
aaa authentication failthrough disable
aaa authentication fallback disable
aaa authentication login tacacs+
interface mgmt
ip address 10.4.4.52/24 gateway 10.4.4.1
!
pbnoscli# 
```