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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter6 Administering the Switch
Protecting Access to Privileged EXEC Commands
Beginning in privileged EXEC mode, follow these steps to disable p asswor d reco very:
To re-enable password recovery, use the service password-recovery global configuration command.
Note Disabling password recovery will not work if you have set the switch to boot manually b y using the
boot manual global configuration command because this command allows the user to automatically
see the boot loader prompt (switch:) after power cycling the switch.
Setting a Telnet Password for a Terminal Line
When you power-up your switch for the first time, an automatic setup pr ogram r uns to assign I P
information and to create a default configuration for continued use. The setup program al so prompts you
to configure your switch for Telnet access through a password. If you neglected to configure this
password during the setup program, you can configure it now through the comman d-line interface (CLI).
Beginning in privileged EXEC mode, follow these steps to confi gure you r switc h for Telnet access:
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 no service password-recovery Disable password recovery.
This setting is saved in an area of the Flash memory that is accessible by
the boot loader and the IOS image, but it is not part of the file system and
is not accessible by any user.
Step3 end Return to privileged EXEC mode.
Step4 show version Verify the configuration by checking the last few lines of the display.
Command Purpose
Step1 Attach a PC or workstation with emulation software to the switch console
port.
The default data characteristics of the console port are 9600, 8, 1, no
parity. You might need to press the Return key several times to see the
command-line prompt.
Step2 enable password password Enter privileged EXEC mode.
Step3 configure terminal Enter global configuration mode.
Step4 line vty 0 15 Configure the number of Telnet sessions (lines), and enter line
configuration mode.
There are 16 possible sessions on a command-capable switch. The 0
and 1 5 mean tha t you are configu ring all 16 po ssible Telnet sessions.
Step5 password password Enter a Telnet password for the line or lines.
For password, specify a string from 1 to 25 alphanumeric characters. The
string cannot start with a number, is case sensitive, and allows spaces but
ignores leading spaces. By default, no password is defined.
Step6 end Return to privileged EXEC mode.