Information Technology Reference
In-Depth Information
local —(Optional) Selects local password checking. Authentication is based on the username
specified with the username global configuration command.
tacacs —(Optional) Selects the TACACS-style user ID and password-checking mechanism.
Examples:
The following example sets the password letmein on virtual terminal line 4:
line vty 4
password letmein
login
Syntax:
To specify a password on a line, use the password line configuration command:
password password
Syntax description:
password —Character string that specifies the line password. The first character cannot be a number.
The string can contain any alphanumeric characters, including spaces, up to 80 characters. You
cannot specify the password in the format number-space-anything. The space after the number
causes problems. For example, hello 21 is a legal password, but 21 hello is not. The password
checking is case-sensitive. For example, the password Secret is different from the password secret .
When an exec process is started on a line with password protection, the exec prompts for the
password. If the user enters the correct password, the exec prints its normal privileged prompt. The
user can try three times to enter a password before the exec exits and returns the terminal to the idle
state.
Example:
The following example removes the password from virtual terminal lines 1 to 4:
line vty 1 4
no password
Step 13
Enter the write memory privileged exec command to write the configuration changes into stored
memory. Proceed to Step 16.
Step 14
If your password is clear-text (is not encrypted), enter the show configuration privileged exec
command.
Step 15
If you have lost the enable password, locate the enable-password global configuration command entry
in the configuration, and record the password.
If you have lost the login password, find the configuration entries for the console line and record the
password indicated by the password line configuration command. Do not make configuration changes
or use the write memory command at this time.
Step 16
Power down the router.
Step 17
Return the hardware configuration register DIP switches located on the back panel of the router to their
original settings (the settings that you noted in Step 2).
Step 18
Power up the router. Use your new or recovered password to gain access to the router.
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