Cisco 900 Service Manual

Cisco 900 Series Integrated Services Routers Software Configuration Guide

June 6, 2019

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Cisco 900 Series, Integrated Services Routers Software Configuration Guide

CONTENTS

Preface ix

Objectives ix

Audience ix

Organization ix

Conventions x

Preface

This preface describes the objectives, audience, organization, conventions of this guide, and the references that accompany this document set. The following sections are provided:

• Objectives, page ix

• Audience, page ix

Objectives

This guide provides information about how to configure the various features of Cisco 900 Series integrated services routers (ISRs).

Audience

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.

Organization

This document is organized into the following chapters:

• Organization, page ix

• Conventions, page x

• Related Documentation, page xi

• Obtaining Documentation and Submitting a Service Request, page xi

Chapter Description

Product Overview Provides an overview of the hardware and software features of Cisco 900

Series ISRs.

Installing the Software Describes how to upgrade Cisco IOS image, Field Replaceable units, and

use Cisco Licenses.

Basic Router Configuration

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

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Chapter Description

Configuring Ethernet Switches

Configuring PPP over Ethernet with NAT

Configuring a LAN with DHCP and VLANs

Configuring Identity Features on Layer 3 Interface

Configuring Security Features

Configuring VDSL2 and ADSL2/2+

Configuring 4G Wireless WA N

Configuring Secure Storage

Describes the procedures for configuring Gigabit Ethernet (GE) switch.

Describes the procedures for configuring Point-to-Point Protocol over Ethernet (PPPoE) clients and network address translation (NAT).

Describes the procedures for configuring LAN with DHCP and VLANs.

Describes configuring the identify features on Layer 3 interfaces.

Describes how to configure security features.

Describes how to configure multimode VDSL2 and ADSl2+ WAN connectivity on a Cisco 900 series ISR.

Describes how to configure the 4G Wireless WAN interface.

Describes how to enable and disable secure storage.

Conventions

This document uses the following conventions:

Convention Indication

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.

string 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.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

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.

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

xii

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Cisco 900 Series Integrated Services Routers Overview

This chapter provides an overview of Cisco 900 Series Integrated Services Routers (ISRs). The chapter contains the following sections:

• Overview of the Cisco 900 Series ISR, page 1

• Cisco 900 Series ISR Models, page 2

• Cisco 900 Series ISR Features, page 3

Overview of the Cisco 900 Series ISR

Cisco 900 Series ISRs are entry level branch routers that provide secure network connectivity for small offices to a central location. These powerful, fixed-configuration routers provide secure broadband and Metro Ethernet and connectivity. Service providers offering managed Ethernet WAN services can deploy them in customer locations as CPE.

CHA P TER

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Cisco 900 Series ISR Models

Internet

Access Only

Employee

(Corporate

VPN Access)

Cisco 900

ISP

VPN

Tunnel

Headquarters

Management

Corporate

Campus

Internet

Figure 1-1 explains a scenario where the Cisco 900 Series ISR is deployed to provide remote

connectivity from a small office to central office over secure VPN tunnels. In this scenario corporate users use a separate VLAN than the Internet users.

Figure 1-1 Cisco 900 Series Deployment Example

Chapter Cisco 900 Series Integrated Services Routers Overview

Cisco 900 Series ISR Models

Cisco 900 Series ISRs are available in the following models:

• Cisco C921-4P

• Cisco C921J-4P

• Cisco C931-4P

Table 1-1 summarizes the LAN and WAN interface options available for the Cisco 900 Series ISR

models.

Table 1-1 LAN and WAN Interfaces of the Cisco 900 Series ISRs

900 Series Models LAN Interfaces GE WAN Interfaces

Cisco C921-4P 4 port 10/100/1000 Mbps managed

switch

Cisco C921J-4P 4 port 10/100/1000 Mbps managed

switch

C921-4PLTEGB 4 port 10/100/1000 Mbps managed

Cisco 900 Series Integrated Services Routers Software Configuration Guide

switch

2 Gigabit Ethernet ports

Chapter Cisco 900 Series Integrated Services Routers Overview

900 Series Models LAN Interfaces GE WAN Interfaces

C921-4PLTEAU 4 port 10/100/1000 Mbps managed

switch

C921-4PLTENA 4 port 10/100/1000 Mbps managed

switch

C926-4P 4 port 10/100/1000 Mbps managed

switch

C926-4PLTEGB 4 port 10/100/1000 Mbps managed

switch

C927-4P 4 port 10/100/1000 Mbps managed

switch

C927-4PM 4 port 10/100/1000 Mbps managed

switch

C927-4PLTEGB 4 port 10/100/1000 Mbps managed

switch

C927-4PMLTEGB 4 port 10/100/1000 Mbps managed

switch

C927-4PLTEAU 4 port 10/100/1000 Mbps managed

switch

Cisco C931-4P 4 port 10/100/1000 Mbps managed

switch

Cisco 900 Series ISR Features

2 Gigabit Ethernet ports

1 Gigabit Ethernet ports

2 Gigabit Ethernet ports

Cisco 900 Series ISR Features

Some of the key features supported by Cisco 900 Series ISRs are:

• Redundant WAN connections for failover protection and load balancing

• Dynamic failover protocols such as Virtual Router Redundancy Protocol (VRRP; RFC 2338) and

Hot Standby Router Protocol (HSRP)

• Network perimeter security with integrated application inspection firewall

• Data privacy through high-speed IP Security (IPsec) Triple Data Encryption Standard (3DES) and

Advanced Encryption Standard (AES) encryption

• Enforced security policy with intrusion prevention

• Security hardware acceleration

• Next-generation encryption for secure network communications systems, reliable for the next

decade

• Supports LAN connections

• Simplifies and centralizes configuration and management of wireless and wireline devices. Supports

WLAN services without requiring a wireless LAN controller

• Supports separate console and USB ports

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Cisco 900 Series ISR Features

LEDs on the Cisco 900 Series ISR

Table 1-2 describes the LEDs on the Cisco 900 Series ISR.

Table 1-2 LEDs on the Cisco 900 Series ISR

LED Color Description

SYS OFF System is off.

VPN OK Green At least one VPN session is active.

LAN Green(Solid) LAN connection is established

WAN Green(Solid) WAN link is established.

DSL CD OFF Shut.

DSL Data OFF Shut.

RSSI Green (Solid) Signal > –60 dBm

Chapter Cisco 900 Series Integrated Services Routers Overview

Blink Boot up phase or in ROM Monitor

mode.

Steady on Normal operation.

Amber(steady) Thermal trip.

Amber(blink) ROMMON code signing verification

failure.

OFF VPN not connected.

Green (Blinking) Data transmission is happening on the

link.

OFF LAN is not connected.

Green (Blinking) Data transmission is happening on the

link.

OFF WAN link is not connected.

Green(Blinking) Training, or no shut and cable

disconnected.

Green (solid) Trained.

Green(Blinking) TX/RX Data.

Very strong signal

Yellow 60dBm > Signal > -75dBm

Strong signal

Yellow(blinking) 75dBm > Signal > -90dBm

Fair signal

OFF Signal < –90 dBm

Unusable signal

SIM OFF No SIM.

Steady on SIM present in slot.

Blink TXD/RXD data.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Chapter Cisco 900 Series Integrated Services Routers Overview

Cisco 900 Series ISR Features

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Cisco 900 Series ISR Features

Chapter Cisco 900 Series Integrated Services Routers Overview

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Installing the Software

This chapter describes how to upgrade Cisco IOS images, use ROM Monitor, upgrade Field Programmable units, and the licensing packages supported on Cisco ISR 900 Series routers. This chapter includes the following sections:

• ROM Monitor, page 5

• Upgrading ROMMON using Capsule Upgrade, page 10

• Upgrading the Cisco IOS Software, page 11

• Licensing, page 21

ROM Monitor

The ROM monitor firmware runs when the router is powered up or reset. The firmware helps to initialize the processor hardware and boot the operating system software. You can use the ROM monitor to perform certain configuration tasks, such as recovering a lost password or downloading Cisco IOS software.

Before using the ROM monitor, you should understand the following concepts:

• ROM Monitor Mode Command Prompt, page 5

CHA P TER

• Why is the Router in ROM Monitor Mode?, page 5

• When do I use ROM Monitor?, page 6

• Tips for Using ROM Monitor Commands, page 6

ROM Monitor Mode Command Prompt

The ROM monitor uses the rommon x > command prompt. The x variable begins at 1 and increments each time you press Return or Enter in ROM monitor mode.

Why is the Router in ROM Monitor Mode?

The router boots to ROM monitor mode when one of the following occurs:

• During power up or reload, the router did not find a valid system image.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

ROM Monitor

• The last digit of the boot field in the configuration register is 0 (for example, 0x100 or 0x0).

• The Ctrl+C is entered during the first 60 seconds after reloading the router.

To exit ROM monitor mode, see the “Exiting ROM Monitor Mode” section on page 2-10.

When do I use ROM Monitor?

Use ROM monitor in the following situations:

• Manually loading a system image—You can load a system image without configuring the router to

load that image in future system reloads or power-cycles. This can be useful for testing a new system image or for troubleshooting. See the “Modifying the Configuration Register (confreg)” section on

page 2-8.

• Upgrading the system image when there are no TFTP servers or network connections, and a direct

PC connection to the router console is the only viable option—See information about upgrading the system image in the configuration documentation for your router.

• During troubleshooting if the router crashes and hangs—See the “Exiting ROM Monitor Mode”

section on page 2-10.

• Disaster recovery—Use the following method for recovering the system image or configuration file:

–

TFTP download (tftpdnld)—Use this method if you can connect a TFTP server directly to the fixed WAN port on your router. See the “Exiting ROM Monitor Mode” section on page 2-10.

Chapter Installing the Software

Note Recovering the system image is different from upgrading the system image. You need to

recover the system image if it becomes corrupt or if it is deleted because of a disaster that affects the memory device severely enough to require deleting all data on the memory device in order to load a system image.

Tips for Using ROM Monitor Commands

• ROM monitor commands are case sensitive.

• You can halt any ROM monitor command by entering the Ctrl+C on the PC or terminal.

• To find out which commands are available on your router and to display command syntax options,

see the “Modifying the Configuration Register (confreg)” section on page 2-8.

How to Use the ROM Monitor—Typical Tasks

This section provides the following procedures:

• Entering ROM Monitor Mode, page 7

• Modifying the Configuration Register (confreg), page 8

• Obtaining Information on USB Flash Devices, page 9

• Exiting ROM Monitor Mode, page 10

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Chapter Installing the Software

Note This section does not describe how to perform all possible ROM monitor tasks. Use the command help

to perform any tasks that are not described in this document. See the “Modifying the Configuration

Entering ROM Monitor Mode

This section provides two ways to enter ROM monitor mode:

• Using the Break Key Sequence to Interrupt the System Reload and Enter ROM Monitor Mode,

page 7

• Setting the Configuration Register to Boot to ROM Monitor Mode, page 8

Prerequisites

Connect a terminal or PC to the router console port. For help, see the hardware installation guide for your router.

ROM Monitor

Using the Break Key Sequence to Interrupt the System Reload and Enter ROM Monitor Mode

To enter ROM monitor mode by reloading the router and entering the Break key sequence, follow these steps:

Router> enable Router# reload Press Ctrl+ C

You must press Ctrl+C within 60 seconds after you enter the reload command. Before you press Ctrl+C, wait for the display to show the five dots as shown in this example:

Router#reload Proceed with reload? [confirm]

*Sep 14 08:52:19.147: %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload Command. System Bootstrap, Version 15.8(3r)M0b, RELEASE SOFTWARE (fc1) Copyright (c) 2018 by cisco Systems, Inc. Compiled Mon 03-Sep-2018 9:01:14.57

C931-4P platform with 1048576 Kbytes of main memory

System Integrity Status: 0x00000000 Current image running: Upgrade Last reset cause: Software initiated

Rom image verified correctly

..... <<<<<<<<<<-----------Pressed Ctrl+C to break autoboot and enter ROMMON shell

rommon 1 >

What to Do Next

• Proceed to the “Modifying the Configuration Register (confreg)” section on page 2-8.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

ROM Monitor

• If you use the Break key sequence to enter ROM monitor mode when the router would otherwise

have booted the system image, you can exit ROM monitor mode by entering the i or reset command, which restarts the booting process and loads the system image.

Setting the Configuration Register to Boot to ROM Monitor Mode

This section describes how to enter ROM monitor mode by setting the configuration register to boot to ROM monitor mode at the next system reload or power-cycle.

Caution Do not set the configuration register by using the config-register 0x0 command after you have set the

baud rate. To set the configuration register without affecting the baud rate, use the current configuration register setting by entering the show ver | inc configuration command, and then replacing the last (rightmost) number with a 0 in the configuration register command.

This example shows how to set the configuration register to boot to ROM monitor mode:

Router> Router> enable Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)# config-register 0x0 Router(config)# exit Router# *Sep 14 08:56:31.265: %SYS-5-CONFIG_I: Configured from console by console Router#write memory Building configuration... [OK][OK] Router# *Sep 14 08:56:41.715: %SYS-2-PRIVCFG_ENCRYPT: Successfully encrypted private config file Router#reload Proceed with reload? [confirm]

*Sep 14 08:56:47.531: %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload Command. System Bootstrap, Version 15.8(3r)M0b, RELEASE SOFTWARE (fc1) Copyright (c) 2018 by cisco Systems, Inc. Compiled Mon 03-Sep-2018 9:01:14.57

C931-4P platform with 1048576 Kbytes of main memory

System Integrity Status: 0x00000000 Current image running: Upgrade Last reset cause: Software initiated

Rom image verified correctly

Chapter Installing the Software

What to Do Next

Proceed to the “Modifying the Configuration Register (confreg)” section on page 2-8.

Modifying the Configuration Register (confreg)

This section describes how to modify the configuration register by using the confreg ROM monitor command. You can also modify the configuration register setting from the Cisco IOS command-line interface (CLI) by using the config-register command in global configuration mode.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Chapter Installing the Software

Caution Do not set the configuration register by using the config-register 0x0 command after setting the baud

rate. To set the configuration register without affecting the baud rate, use the current configuration register setting by entering the show ver | inc configuration command and then replacing the last (rightmost) number with a 0 in the configuration register command.

Note The modified configuration register value is automatically written into NVRAM, but the new value does

not take effect until you reset or power-cycle the router.

In this example, the configuration register is set to boot the system image from flash memory:

rommon 3 > confreg 0x2102

In this example, no value is entered; therefore, the system prompts for each bit in the register:

rommon 3> confreg

Configuration Summary (Virtual Configuration Register: 0x100) enabled are: [ 0 ] console baud: 9600

boot:...... the ROM Monitor

do you wish to change the configuration? y/n [n]: y enable "diagnostic mode"? y/n [n]: n enable "break/abort has effect"? y/n [n]: n enable "ignore system config info"? y/n [n]: n change console baud rate? y/n [n]: n change the boot characteristics? y/n [n]: y 0 = the ROM Monitor 1-15 = boot system enter boot option [0]: 3

ROM Monitor

Obtaining Information on USB Flash Devices

This example shows how to display the contents of the USB flash device, including directories, files, permissions, and sizes:

rommon 3 > dir usbflash0:

Size Attributes Name

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

8192 drw- System Volume Information

60865852 -rw- c900-åuniversalk9_npe-mz.SPA.158-3.M0b

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

This example shows the targeted USB flash devices that are inserted in the router and the valid device names that may or may not be currently inserted:

rommon 2 > dev

Devices in device table:

id name

tftp: network via tftp

Cisco 900 Series Integrated Services Routers Software Configuration Guide

ROM Monitor

flash: Internal flash drive

usbflash0: External USB drive 0

Exiting ROM Monitor Mode

This section describes how to exit ROM monitor mode and enter the Cisco IOS command-line interface (CLI). The method that you use to exit ROM monitor mode depends on how your router entered ROM monitor mode:

• If you reload the router and enter the Break key sequence to enter ROM monitor mode when the

router would otherwise have booted the system image, you can exit ROM monitor mode by entering i command or the reset command, which restarts the booting process and loads the system image.

• If your router entered ROM monitor mode because it could not locate and load the system image,

perform the steps in the following procedure.

Command or Action Purpose

Step 1

Step 2

dir flash:[directory]

Example:

rommon > dir flash:

boot flash:[directory] [filename]

boot filename tftpserver

boot [filename]

Example:

ROMMON > boot flash:myimage

Example:

ROMMON > boot someimage 172.16.30.40

Chapter Installing the Software

Displays a list of the files and directories in flash memory.

• Locate the system image that you want the router to

load.

• If the system image is not in flash memory, use the

second or third option in Step 2.

In order, the examples here direct the router to:

• Boot the first image or a specified image in flash

memory.

• Boot the specified image over the network from the

specified TFTP server (hostname or IP address).

• Boot from the boothelper image because it does not

recognize the device ID. This form of the command is used to netboot a specified image.

You can override the default boothelper image setting by setting the BOOTLDR Monitor environment variable to point to another image. Any system image can be used for this purpose.

Note Options to the boot command are -x (load image but

Example:

ROMMON > boot

Upgrading ROMMON using Capsule Upgrade

You can upgrade ROMMON using capsule upgrade. This example shows how to upgrade ROMMON using Capsule Upgrade:

router# > upgrade rom-monitor file flash:c900-CapsuleUpdateFile.15.8-3rM0b

Note Before you upgrade, make sure that you have the Capsule image

‘c900-CapsuleUpdateFile.15.8-3rM0b’ in the router flash.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

do not execute) and -v (verbose).

Chapter Installing the Software

Use the showmon -v command to verify the ROMMON version. This example shows the command output:

rommon 1 > showmon -v

Upgrading the Cisco IOS Software

Your router comes pre-installed with the Cisco IOS image. However, you can install the new version in order to keep router features up to date. This section describes how to upgrade the Cisco Internet Operating System (IOS) software image on a Cisco 900 series ISR.

• Information About Upgrading the System Image, page 11

• How to Upgrade the Cisco IOS Image, page 12

Upgrading the Cisco IOS Software

Information About Upgrading the System Image

To upgrade the system image on your router, review the following sections:

• Why Would I Upgrade the System Image?, page 11

• Which Cisco IOS Release Is Running on My Router Now?, page 11

• How Do I Choose the New Cisco IOS Release and Feature Set?, page 11

• Where Do I Download the System Image?, page 12

Why Would I Upgrade the System Image?

System images contain the Cisco IOS software. Your router was shipped with an image installed. At some point, you may want to load a different image onto the router or the access point. For example, you may want to upgrade your IOS software to the latest release, or you may want to use the same Cisco IOS release for all the routers in a network. Each system image contains different sets of Cisco IOS features, therefore select an appropriate system image to suit your network requirements.

Which Cisco IOS Release Is Running on My Router Now?

To determine the Cisco IOS release that is currently running on your router, and the filename of the system image, enter the show version command in user EXEC or privileged EXEC mode.

How Do I Choose the New Cisco IOS Release and Feature Set?

To determine which Cisco IOS releases and feature are supported on your platform, go to Cisco Feature Navigator at http://www.cisco.com/go/cfn. You must have an account at Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Upgrading the Cisco IOS Software

Where Do I Download the System Image?

To download a system image you must have an account at Cisco.com to gain access to the following websites. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box, and follow the instructions that appear.

If you know the Cisco IOS release and feature set you want to download, go directly to

https://software.cisco.com/download/home

For more information about Loading and Managing System images, go to

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fundamentals/configuration/15mt/fundamentals-15mt-book/cf-config-overview.html

How to Upgrade the Cisco IOS Image

This section provides information about upgrading the Cisco IOS image on the router.

• Saving Backup Copies of Your Old System Image and Configuration, page 12

• Copying the System Image into Flash Memory, page 13

Chapter Installing the Software

• Loading the New System Image, page 16

• Saving Backup Copies of Your New System Image and Configuration, page 19

Saving Backup Copies of Your Old System Image and Configuration

To avoid unexpected downtime in the event you encounter serious problems using a new system image or startup configuration, we recommend that you save backup copies of your current startup configuration file and Cisco IOS software system image file on a server.

The following examples show how to copy a startup configuration to a TFTP server and how to copy from flash memory to an FTP server.

Copying the Startup Configuration to a TFTP Server: Example

The following example shows the startup configuration being copied to a TFTP server:

Router# copy nvram:startup-config tftp:

Remote host[]? 192.0.0.1

Name of configuration file to write [rtr2-confg]? rtr2-config-b4upgrade Write file rtr2-confg-b4upgrade on host 192.0.0.1?[confirm] <cr> ![OK]

Copying from Flash Memory to a TFTP Server: Example

The following example uses the dir flash: command in privileged EXEC mode to learn the name of the system image file and the copy flash: tftp: command in privileged EXEC mode to copy the system image to a TFTP server. The router uses the default username and password.

Router# copy flash: tftp: Source filename [running-config]? Address or name of remote host []? 192.0.0.1 Destination filename [router-confg]? running-config 983 bytes copied in 0.048 secs (20479 bytes/sec)

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Chapter Installing the Software

Router# Router# dir flash: Directory of flash:/

1 -rw- 64383100 Sep 17 2018 05:58:14 +00:00 c900-universalk9-mz.SSA_09-10 2 -rw- 1524 Sep 17 2018 05:55:30 +00:00 c900_startupconfig-backup 3 -rw- 919 Sep 17 2018 05:58:44 +00:00 PSZ22241BW6_20180906052515287.zip

1936031744 bytes total (1871634432 bytes free) Router#

Copying the System Image into Flash Memory

This section describes how to copy the system image into the flash memory card for your router.

Note The router should have sufficient disk or flash memory to store the Cisco IOS. The router should also

have sufficient memory (DRAM) to run the Cisco IOS. If the router does not have sufficient memory (DRAM), the router will have boot problems when it boots through the new Cisco IOS.

To copy the system image into the flash memory card for your router, choose one of the following methods:

• Entering ROM Monitor Mode, page 7

• Using the ROM Monitor to Copy the System Image over a Network, page 14

Upgrading the Cisco IOS Software

• Loading the New System Image, page 16

Using TFTP or Remote Copy Protocol to Copy the System Image into Flash Memory

This section describes how to use TFTP or Remote Copy Protocol (RCP) to upgrade the system image. This is the recommended and most common method of upgrading the system image.

Prerequisites

The following details the logistics of upgrading the system image.

• Install a TFTP server or an RCP server application on a TCP/IP-ready workstation or PC. Many

third-party vendors provide free TFTP server software, which you can find by searching for “TFTP server” in a web search engine.

If you use TFTP:

–

Configure the TFTP application to operate as a TFTP server, not a TFTP client.

–

Specify the outbound file directory to which you will download and store the system image.

• Download the new Cisco IOS software image into the workstation or PC. See the “Where Do I

Download the System Image?” section on page 2-12.

• Establish a console session to the router. We recommend that you connect your PC directly to the

router console port. See the hardware installation guide for your router.

• Verify that the TFTP or RCP server has IP connectivity to the router. If you cannot successfully ping

between the TFTP or RCP server and the router, do one of the following:

–

Configure a default gateway on the router.

–

Make sure that the server and the router each have an IP address in the same network or subnet. .

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Upgrading the Cisco IOS Software

Tip For more detailed information on how to perform the prerequisites, see the Software Installation and

Upgrade Procedure tech note.

To copy the system image into the flash memory card for your router, follow these steps:

Step 1 enable

Use this command to enter privileged EXEC mode. Enter your password if prompted:

Router> enable Password: <password> Router#

Step 2 copy tftp: flash:

copy rcp flash

Use one of these commands to copy a file from a server to flash memory:

Router# copy tftp: flash:

Chapter Installing the Software

Step 3 When prompted, enter the IP address of the TFTP or RCP server:

Step 4 When prompted, enter the filename of the Cisco IOS software image to be installed:

Step 5 When prompted, enter the filename as you want it to appear on the router. Typically, the same filename

Step 6 If an error message appears that says, “Not enough space on device”, delete files from flash and try

Step 7 If the error message does not appear, enter no when prompted to erase the flash memory before copying:

What to Do Next

Address or name of remote host []? 10.10.10.2

Source filename []? c900-universalk9-mz.bin

Note The filename is case sensitive.

is entered as was used in Step 4:

Destination filename []? c900-universalk9-mz.bin

again. To delete files from flash, use the delete flash: filename command.

Accessing tftp://10.10.10.2/c900-universalk9-mz.bin... Erase flash: before copying? [confirm] no

Proceed to the “Loading the New System Image” section on page 2-16.

Using the ROM Monitor to Copy the System Image over a Network

This section describes how to download a Cisco IOS software image from a remote TFTP server to the router flash memory by using the tftpdnld ROM monitor command.

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Chapter Installing the Software

Prerequisites

Note You can use the tftpdnld command only to download files to the router. You cannot use tftpdnld to get

Step 1 Enter ROM monitor mode.

Step 2 Set the IP address of the router. For example:

Step 3 Set the IP subnet mask. For example:

Upgrading the Cisco IOS Software

Before you can enter the tftpdnld ROM monitor command, you must set the ROM monitor environment variables.

Connect the TFTP server to a fixed network port on your router.

files from the router.

To download a Cisco IOS software image from a remote TFTP server to the router flash memory by using the tftpdnld ROM monitor command, follow these steps:

rommon > IP_ADDRESS=172.16.23.32

rommon > IP_SUBNET_MASK=255.255.255.224

Step 4 Set the default gateway address. For example:

rommon > DEFAULT_GATEWAY=172.16.23.40

Step 5 Set the TFTP server IP address, which is the location from which the software will be downloaded:

rommon > TFTP_SERVER=172.16.23.33

Step 6 Set the name and directory location to which the image file will be downloaded onto the router. For

example:

rommon > TFTP_FILE=archive/rel22/<image name>

Step 7 (Optional) Set the input port to use a Gigabit Ethernet port. Usage is GE_PORT=[0 | 1 | 2]. For example:

rommon > GE_PORT=0

Step 8 Use the set command to display the ROM monitor environment variables to verify that you have

configured them correctly. For example:

rommon > set

Step 9 Download the system image, as specified by the ROM monitor environmental variables, using the

tftpdnld [-r] command. Without the -r option, the command downloads the specified image and saves it in flash memory. Using the -r option downloads and boots the new software but does not save the software to flash memory.

rommon 5 > tftpdnld -r Attempting to boot from [tftp:]

What to Do Next

Proceed to the “Loading the New System Image” section on page 2-16.

Cisco 900 Series Integrated Services Routers Software Configuration Guide

Upgrading the Cisco IOS Software

Loading the New System Image

This section describes how to load the new system image that you copied into flash memory. First, determine whether you are in ROM monitor mode or in the Cisco IOS CLI, then choose one of the following methods of loading the new system image:

• Loading the New System Image from the Cisco IOS Software, page 16

• Loading the New System Image from ROM Monitor Mode, page 18

Loading the New System Image from the Cisco IOS Software

To load the new system image from the Cisco IOS software, follow these steps.

Step 1 dir flash:

Use this command to display a list of all files and directories in flash memory:

Router# dir flash:

Directory of flash:/

1936031744 bytes total (1871634432 bytes free) Router#

Chapter Installing the Software

Note Determine whether the new system image is the first file or the only file listed in the dir flash:

command output ( is not required if it is the first file or only file listed).

Step 2 configure terminal

Use this command to enter global configuration mode:

Router# configure terminal

Router(config)#

Step 3 no boot system

Use this command to delete all entries in the bootable image list, which specifies the order in which the router attempts to load the system images at the next system reload or power cycle:

Router(config)# no boot system

Step 4 If the new system image is the first file or the only file displayed in the dir flash: command output, you

do not need to perform the following step.

boot system flash:system-image-filename

Use this command to load the new system image after the next system reload or power cycle. For example:

Router(config)# boot system flash:c900-universalk9-mz.bin

Step 5 (Optional) Repeat to specify the order in which the router should attempt to load any backup system

images.

Step 6 exit

Cisco 900 Series Integrated Services Routers Software Configuration Guide

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