Understanding Cisco Ios Software Basics; Getting Help; Understanding Command Modes - Cisco 2620 Configuration Manual

Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics
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Understanding Cisco IOS Software Basics

This section describes what you need to know about the Cisco IOS software before you configure the
router using the command-line interface (CLI). This chapter includes the following:
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Understanding these concepts will save time as you begin to use the CLI. If you have never used the
Cisco IOS software or need a refresher, take a few minutes to read this chapter before you proceed to
the next chapter.
If you are already familiar with Cisco IOS software, proceed to
Facility."

Getting Help

Use the question mark (?) and arrow keys to help you enter commands:
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Understanding Command Modes

The Cisco IOS user interface is divided into different modes. Each command mode permits you to
configure different components on your router. The commands available at any given time depend on
which mode you are currently in. Entering a question mark (?) at the prompt displays a list of commands
available for each command mode.
OL-1957-04
1/0/1—Chassis slot 1/Voice module slot 0/Voice interface 1
1/1/0—Chassis slot 1/Voice module slot 1/Voice interface 0
1/1/1—Chassis slot 1/Voice module slot 1/Voice interface 1
Getting Help, page 1-13
Understanding Command Modes, page 1-13
Undoing a Command or Feature, page 1-14
Saving Configuration Changes, page 1-15
Where to Go Next, page 1-15
For a list of available commands, enter a question mark:
Router> ?
To complete a command, enter a few known characters followed by a question mark (with no space):
Router> s?
For a list of command variables, enter the command followed by a space and a question mark:
Router> show ?
To redisplay a command you previously entered, press the up arrow key. You can continue to press
the up arrow key for more commands.
Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
Table 1-2 lists the most common command modes.
Understanding Cisco IOS Software Basics
Chapter 2, "Using the Setup Command
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