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Configuring Authentication
Clearing the TACACS+ Key
To clear the TACACS+ key, perform this task in privileged mode:
Task
Step 1
Clear the TACACS+ key.
Step 2
Verify the TACACS+ configuration.
This example shows how to clear the TACACS+ key:
Console> (enable) clear tacacs key
TACACS server key cleared.
Console> (enable)
Disabling TACACS+ Authentication
If you disable TACACS+ authentication with both RADIUS and local authentication disabled, local
authentication is reenabled automatically.
To disable TACACS+ authentication, perform this task in privileged mode:
Task
Step 1
Disable TACACS+ authentication for normal
login mode. Use the console or telnet keywords if
you want to disable TACACS+ only for console
port or Telnet connection attempts.
Step 2
Disable TACACS+ authentication for enable
mode. Use the console or telnet keywords if you
want to disable TACACS+ only for console port
or Telnet connection attempts.
Step 3
Verify the TACACS+ configuration.
This example shows how to disable TACACS+ authentication for console and Telnet connections and
how to verify the configuration:
Console> (enable) set authentication login tacacs disable
tacacs login authentication set to disable for console and telnet session.
Console> (enable) set authentication enable tacacs disable
tacacs enable authentication set to disable for console and telnet session.
Console> (enable) show authentication
Login Authentication:
---------------------
tacacs
radius
local
Enable Authentication: Console Session
---------------------- ----------------- ----------------
tacacs
radius
local
Console> (enable)
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
27-22
Command
clear tacacs key
show tacacs
Command
set authentication login tacacs disable [all |
console | http | telnet]
set authentication enable tacacs disable [all |
console | http | telnet]
show authentication
Console Session
Telnet Session
----------------
----------------
disabled
disabled
disabled
disabled
enabled(primary)
enabled(primary)
Telnet Session
disabled
disabled
disabled
disabled
enabled(primary)
enabled(primary)
Chapter 27
Configuring Switch Access Using AAA
78-12647-02
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