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1. Upgrading to a New Cisco Ios Release

Understanding Cisco IOS Software Basics

•

Understanding Cisco IOS Software Basics

This section describes what you need to know about the Cisco IOS software before you configure the

VG by using the command-line interface (CLI). This chapter includes the following:

•

Understanding these concepts will save time as you begin to use the CLI. If you have never used

Cisco IOS software or if you need a refresher, take a few minutes to read this chapter before you proceed

to the next chapter.

For a comprehensive view of Cisco IOS configuration fundamentals, see the

Note

Fundamentals Configuration Guide, Release 12.4

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:

•

Command Modes

The Cisco IOS user interface involves different modes. Each command mode permits you to configure

different components on your VG. 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.

Cisco VG202 and Cisco VG204 Voice Gateways Software Configuration Guide

1-4

10/100BASE-T Fast Ethernet ports are numbered Fast Ethernet 0/0 and Fast Ethernet 0/1, from right

to left.

Getting Help, page 1-4

Command Modes, page 1-4

Undoing a Command or Feature, page 1-5

Saving Configuration Changes, page 1-6

Where to Go Next, page 1-7

For a list of available commands, enter a question mark:

VG> ?

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

VG> s?

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

VG> 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.

Table 1-1

Chapter 1

Understanding Interface Numbering and Cisco IOS Software Basics

document.

lists the most common command modes.

Cisco IOS Configuration

Chapter 2, "Using the setup Command

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