Cisco 3900 Series, 2900 Series, and 1900 Series Software Configuration Guide
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This preface describes the objectives, audience, organization, conventions of this guide, and the references that accompany this document set. The following sections are provided:


This guide provides an overview and explains how to configure the various features for the Cisco 1900 series, Cisco 2900 series, and Cisco 3900 series integrated services routers generation 2 (ISR G2). Some information may not apply to your particular router model.


This document is written for experienced technical workers who install, monitor, and troubleshoot routers under a service contract, or who work for an information technology (IT) department.


This guide is divided into three parts:

  • Part 1—Configuring the Router
  • Part 2—Configuring the Access Point
  • Part 3—Appendix


Part 1
Configuring the Router

Module 1

Overview of Hardware and Software

Describes new hardware and software features in this release, features by platform, new slots, common ports, and getting started tasks.

Module 2

Basic Router Configuration

Describes how to perform the basic router configuration, interface configuration, and routing configuration.

Module 3

Configuring Backup Data Lines and Remote Management

Describes how to configure backup interfaces, dial backup, and remote management.

Module 4

Configuring Power Efficiency Management

Describes the hardware and software power efficiency management features on the router. See Cisco EnergyWise Configuration Guide for information about configuring power efficiency management on modules and interface.

Module 5

Configuring Security Features

Describes how to configure security features.

Module 6

Unified Communications on Cisco Integrated Services Routers

Describes voice application services that are supported on these routers.

Module 7

Configuring Next-Generation High-Density PVDM3 Modules

Describes how to configure the new next-generation PVDM31 installed on your router.

Module 8

Multi-Gigabit Fabric Communication

Describes how modules and interface cards inter-communicate using the MGF2 on the router.

Module 9

Upgrading the Cisco IOS Software

Describes how to upgrade the Cisco IOS software image on the router or the access point.

Part 2
Configuring the Access Point

Module 1

Wireless Overview

Describes the autonomous image and recovery image shipped on the Cisco 1941W access point flash. Explains the default autonomous mode and Cisco Unified mode.

Module 2

Configuring the Wireless Device

Describes how to configure the autonomous wireless device, how to upgrade the autonomous software to Cisco Unified software, and how to configure a Unified wireless device.

Module 3

Configuring the Radio Settings

Describes how to configure the radio settings for the wireless device.

Module 4

Administering the Wireless Device

Describes many administration tasks for the wireless device.

Part 3

Appendix A

Cisco IOS CLI for Initial Configuration

Describes how to perform the initial configuration of the router using the Cisco IOS CLI, and additional configuration procedures for the router.

Appendix B

Using CompactFlash Memory Cards

Describes how to use Advanced Capability CF3 memory cards on the router.

Appendix C

Using ROM Monitor

Describes how to use the ROM monitor to manually load a system image, upgrade the system image when there are no TFTP servers or network connections, or prepare for disaster recovery.

Appendix D

Changing the Configuration Register Settings

Describes the 16-bit configuration register in NVRAM and how to make changes to the register settings using the Cisco IOS CLI.

1.PVDM3 = packet voice/data module

2.MGF = Multi-Gigabit Fabric.

3.CF = CompactFlash.


This document uses the following conventions:


bold font

Commands and keywords and user-entered text appear in bold font.

italic font

Document titles, new or emphasized terms, and arguments for which you supply values are in italic font.

[ ]

Elements in square brackets are optional.

{x | y | z }

Required alternative keywords are grouped in braces and separated by vertical bars.

[ x | y | z ]

Optional alternative keywords are grouped in brackets and separated by vertical bars.


A nonquoted set of characters. Do not use quotation marks around the string or the string will include the quotation marks.

courier font

Terminal sessions and information the system displays appear in courier font.

< >

Non-printing characters such as passwords are in angle brackets.

[ ]

Default responses to system prompts are in square brackets.

!, #

An exclamation point (!) or a pound sign (#) at the beginning of a line of code indicates a comment line.

Note Means reader take note.

Tip Means the following information will help you solve a problem.

Caution Means reader be careful. In this situation, you might perform an action that could result in equipment damage or loss of data.

Timesaver Means the described action saves time. You can save time by performing the action described in the paragraph.

Warning Means reader be warned. In this situation, you might perform an action that could result in bodily injury.

Related Documentation

In addition to the Cisco 1900 series, Cisco 2900 series, and Cisco 3900 series ISR Software Configuration Guide (this document), the following reference guides are included:


Type of Document


Regulatory Compliance

Software Activation


Cisco Internet Operating System Software (IOS)

Cisco IOS software release 15.0 is the next IOS release following the Cisco IOS 12.4(24)T release. For information about new features in Cisco IOS software release 15.0, see the Cisco IOS software pages at

Go here to read a product bulletin that specifies the software feature sets available for Cisco 1900, 2900 and 3900 Series Integrated Services Routers in release 15.0. It also issues recommendations for Flash and DRAM memory configuration.




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