Cisco Systems 3750E Setting a Telnet Password for a Terminal Line, Line vty 0, Password password

Chapter 9 Configuring Switch-Based Authentication

Protecting Access to Privileged EXEC Commands

Setting a Telnet Password for a Terminal Line

When you power-up your switch for the first time, an automatic setup program runs to assign IP information and to create a default configuration for continued use. The setup program also prompts you to configure your switch for Telnet access through a password. If you did not configure this password during the setup program, you can configure it now through the command-line interface (CLI).

Beginning in privileged EXEC mode, follow these steps to configure your switch for Telnet access:

	Command	Purpose
Step 1
		Attach a PC or workstation with emulation software to the switch console
		port, or attach a PC to the Ethernet management 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.
Step 2
	enable password password	Enter privileged EXEC mode.
Step 3
	configure terminal	Enter global configuration mode.
Step 4
	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 15 mean that you are configuring all 16 possible Telnet sessions.
Step 5
	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.
Step 6
	end	Return to privileged EXEC mode.
Step 7
	show running-config	Verify your entries.
		The password is listed under the command line vty 0 15.
Step 8
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To remove the password, use the no password global configuration command.

This example shows how to set the Telnet password to let45me67in89:

Switch(config)# line vty 10

Switch(config-line)#password let45me67in89

Configuring Username and Password Pairs

You can configure username and password pairs, which are locally stored on the switch. These pairs are assigned to lines or ports and authenticate each user before that user can access the switch. If you have defined privilege levels, you can also assign a specific privilege level (with associated rights and privileges) to each username and password pair.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

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