
9-14
Using Passwords and TACACS+ To Protect Against Una uthorized Access
TACACS+ Authentication for Central Control of Switch Access Security
Using Passwords and 
TACACS+
Configuring TACACS+ on the SwitchBefore You Begin
If you are new to TACACS+ authentication, HP recommends that you read the 
“General Authentication Setup Procedure” on page 9-11 and configure your 
TACACS+ server(s) before configuring authentication on the switch.
The switch offers three command areas for TACACS+ operation:
■show authentication and show tacacs: Displays the switch’s TACACS+ 
configuration and status. 
■aaa authentication: A command for configuring the switch’s authenti-
cation methods 
■tacacs-server: A command for configuring the switch’s contact with 
TACACS+ servers 
CLI Commands Described in this Section
Viewing the Switch’s Current Authentication Configuration
This command lists the number of login attempts the switch allows in a single 
login session, and the primary/secondary access methods configured for each 
type of access.
Syntax: show authentication
show authentication below
show tacacs  page 9-15
aaa authentication pages page 9-16 through page 9-18
    console pages page 9-16 through page 9-18
    Telnet pa ges page 9-16 through page 9-18
    num-attempts <1..10> pages page 9-16 th rough page 9-18
tacacs-server pages page 9-19 
    host <ip addr> pages page 9-19 
   key page 9-23
   timeout <1 ..255> page 9-24