Cisco 4G-LTE-ANTM-O-3 Installation Guide download pdf (Page 413)

For a list of available commands for a prticular command mode, enter a question mark:

Router> ?

access-enable Create a temporary access-list entry

access-profile Apply user-profile to interface

clear Reset functions

To complete a command, enter a few known characters followed by a question mark (with no space):

Router> sh?

* s=show set show slip systat

For a list of command variables, enter the command followed by a space and a question mark:

Router> show ?

clock Display the system clock

dialer Dialer parameters and statistics

exception exception information

To redisplay a command that you previously entered, press the Up Arrow key. You can continue to press the

Up Arrow key for more commands.

Enable Secret Passwords and Enable Passwords

By default, the router ships without password protection. Because many privileged EXEC commands are used

to set operating parameters, you should password-protect these commands to prevent unauthorized use.

You can use two commands to do this:

• enable secret password—A very secure, encrypted password.

• enable password—A less secure, unencrypted local password.

Both the enable and enable secret passwords control access to various privilege levels (0 to 15). The enable

password is intended for local use and is thus unencrypted. The enable secret password is intended for network

use; that is, in environments where the password crosses the network or is stored on a TFTP server. You must

enter an enable secret or enable password with a privilege level of 1 to gain access to privileged EXEC mode

commands.

For maximum security, the passwords should be different. If you enter the same password for both during the

setup process, your router accepts the passwords, but warns you that they should be different.

An enable secret password can contain from 1 to 25 uppercase and lowercase alphanumeric characters. An

enable password can contain any number of uppercase and lowercase alphanumeric characters. In both cases,

a number cannot be the first character. Spaces are also valid password characters; for example, two words is

a valid password. Leading spaces are ignored; trailing spaces are recognized.

Cisco 800 Series Integrated Services Routers Software Configuration Guide

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Cisco IOS Software Basic Skills

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Cisco 4G-LTE-ANTM-O-3 Installation Guide Page 413