Dell PowerConnect M6220 Configuration Manual page 101

Figure 5-4. PowerConnect 6200 Series Switch with TACACS+
When a user attempts to log into the switch, the NAS or switch prompts for a username and password.
The switch attempts to communicate with the highest priority configured TACACS+ server at
10.10.10.10. Upon successful connection with the server, the switch and server exchange the login
credentials over an encrypted channel. The server then grants or denies access, which the switch honors,
and either allows or does not allow the user to gain access to the switch. If neither of the two servers can
be contacted, the switch searches its local user database for the user.
console# config
tacacs-server host 10.10.10.10
key tacacs1
exit
tacacs-server host 11.11.11.11
key tacacs2
priority 2
exit
aaa authentication login tacacsList tacacs local
101
Device Security