Cisco 831 User Manual

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Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

Corporate Headquarters

Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000

800 553-NETS (6387)

Fax: 408 526-4100

Customer Order Number: DOC-7814784= Text Part Number: 78-14784-02

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.

The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without Cisco’s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California.

NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE.

IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, StrataView Plus, TeleRouter, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.

All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0502R)

Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

Preface xi

Obtaining Documentation xiv

Cisco.com xiv Documentation DVD xv Ordering Documentation xv

Documentation Feedback xv

Cisco Product Security Overview xvi

Reporting Security Problems in Cisco Products xvi

Obtaining Technical Assistance xvii

Cisco Technical Support Website xvii Submitting a Service Request xviii Definitions of Service Request Severity xix

Obtaining Additional Publications and Information xix

Product Overview 1-1

Features 1-2

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Router Overview 1-3

Front Panel 1-3 Back Panel 1-4 LED Functions 1-5

Installation 2-1

Preparing for Installation 2-1

Safety 2-1

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Contents

Warnings 2-2 Preventing Electrostatic Discharge Damage 2-4

Unpacking the Box 2-5

Preventing Damage to the Router 2-6

Installing the Router 2-6

Connecting a Server, PC, or Workstation 2-6 Connecting an External Ethernet Switch (Optional) 2-8 Connecting to the Internet 2-10

Connecting a Broadband Modem 2-10 Connecting a Terminal or PC to the Console Port 2-11 Connecting the AC Adapter 2-12 Connecting the Console Port to an Async Modem 2-14

Checking the PC Configuration 2-16

Verifying Router Operation 2-17

Mounting the Router 2-18

Mounting on a Table 2-18 Mounting on a Wall 2-18

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Connecting to a Website 2-21

What to Do If You Cannot Connect to a Website 2-22

Starting the CRWS Software 2-22

Troubleshooting 3-1

Before You Call Your Cisco Reseller 3-1

Problems During First Startup 3-2

Problems After Router Is Running 3-4

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NDEX

Contents

Specifications and Cables A-5

System Specifications A-5

LAN Port A-7

Console Connector Pinouts A-8

Cabling Specifications A-8

Ethernet Cable Specifications A-9 Maximum Cable Distance A-9

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Contents

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Preface

This preface describes the audience, organization, and conventions used in this guide. It also describes related documentation and how to access electronic documentation.

Audience

This guide is intended for service technicians who have no experience installing routers and whose goal is to connect the router to the network as quickly as possible.

Organization

This guide contains the following information:

• Chapter 1, “Product Overview”—Describes the routers and their features.

• Chapter 2, “Installation”—Provides information on preinstallation

procedures, mounting and connecting of the routers, and verifying the router connections.

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• Chapter 3, “Troubleshooting”—Describes problems that might develop and

how to identify and solve them.

• Appendix A, “Specifications and Cables”—Provides port connector pinouts

and specifications for cables that you might need to provide.

Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

Conventions

This section describes the conventions used in this guide.

Note Means reader take note. Notes contain helpful suggestions or references to

additional information and material.

Caution This symbol means reader be careful. In this situation, you might do something

that could result in equipment damage or loss of data.

Preface

Warning

Waarschuwing

Varoitus

Attention

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with the standard practices for preventing accidents.

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen.

Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista.

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents.

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Preface

Warnung

Avvertenza

Advarsel

Aviso

¡Atención!

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt.

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti.

Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker.

Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes.

Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes.

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Varning!

Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador.

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Obtaining Documentation

Cisco.com

You can access the most current Cisco documentation at this URL:

http://www.cisco.com/univercd/home/home.htm

You can access the Cisco website at this URL:

http://www.cisco.com

You can access international Cisco websites at this URL:

http://www.cisco.com/public/countries_languages.shtml

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Preface

Documentation DVD

Cisco documentation and additional literature are available in a Documentation DVD package, which may have shipped with your product. The Documentation DVD is updated regularly and may be more current than printed documentation. The Documentation DVD package is available as a single unit.

Registered Cisco.com users (Cisco direct customers) can order a Cisco Documentation DVD (product number DOC-DOCDVD=) from the Ordering tool or Cisco Marketplace.

Cisco Ordering tool:

http://www.cisco.com/en/US/partner/ordering/

Cisco Marketplace:

http://www.cisco.com/go/marketplace/

Ordering Documentation

Documentation Feedback

You can find instructions for ordering documentation at this URL:

http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm

You can order Cisco documentation in these ways:

• Registered Cisco.com users (Cisco direct customers) can order Cisco product

documentation from the Ordering tool:

http://www.cisco.com/en/US/partner/ordering/

• Nonregistered Cisco.com users can order documentation through a local

account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 1 800 553-NETS (6387).

Documentation Feedback

You can send comments about technical documentation to bug-doc@cisco.com.

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Cisco Product Security Overview

You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:

Cisco Systems Attn: Customer Document Ordering 170 West Tasman Drive San Jose, CA 95134-9883

We appreciate your comments.

Cisco Product Security Overview

Cisco provides a free online Security Vulnerability Policy portal at this URL:

http://www.cisco.com/en/US/products/products_security_vulnerability_policy.ht ml

From this site, you can perform these tasks:

• Report security vulnerabilities in Cisco products.

• Obtain assistance with security incidents that involve Cisco products.

Preface

• Register to receive security information from Cisco.

A current list of security advisories and notices for Cisco products is available at this URL:

http://www.cisco.com/go/psirt

If you prefer to see advisories and notices as they are updated in real time, you can access a Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed from this URL:

http://www.cisco.com/en/US/products/products_psirt_rss_feed.html

Reporting Security Problems in Cisco Products

Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. If you think that you might have identified a vulnerability in a Cisco product, contact PSIRT:

• Emergencies— security-alert@cisco.com

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Preface

Obtaining Technical Assistance

• Nonemergencies— psirt@cisco.com

Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product to

encrypt any sensitive information that you send to Cisco. PSIRT can work from encrypted information that is compatible with PGP versions 2.x through 8.x.

Never use a revoked or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one that has the most recent creation date in this public key server list:

http://pgp.mit.edu:11371/pks/lookup?search=psirt%40cisco.com&op=index&ex act=on

In an emergency, you can also reach PSIRT by telephone:

• 1 877 228-7302

• 1 408 525-6532

Obtaining Technical Assistance

For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service contract, contact your reseller.

Cisco Technical Support Website

The Cisco Technical Support Website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, 365 days a year, at this URL:

http://www.cisco.com/techsupport

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xvii

Obtaining Technical Assistance

Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:

http://tools.cisco.com/RPF/register/register.do

Note Use the Cisco Product Identification (CPI) tool to locate your product serial

number before submitting a web or phone request for service. You can access the CPI tool from the Cisco Technical Support Website by clicking the Too l s &

Resources link under Documentation & Tools. Choose Cisco Product Identification Tool from the Alphabetical Index drop-down list, or click the Cisco Product Identification Tool link under Alerts & RMAs. The CPI tool

offers three search options: by product ID or model name; by tree view; or for certain products, by copying and pasting show command output. Search results show an illustration of your product with the serial number label location highlighted. Locate the serial number label on your product and record the information before placing a service call.

Preface

Submitting a Service Request

Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at this URL:

http://www.cisco.com/techsupport/servicerequest

For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.

To open a service request by telephone, use one of the following numbers:

Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227) EMEA: +32 2 704 55 55 USA: 1 800 553-2447

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Preface

Obtaining Additional Publications and Information

For a complete list of Cisco TAC contacts, go to this URL:

http://www.cisco.com/techsupport/contacts

Definitions of Service Request Severity

To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.

Severity 1 (S1)—Your network is “down,” or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

• Cisco Marketplace provides a variety of Cisco books, reference guides, and

logo merchandise. Visit Cisco Marketplace, the company store, at this URL:

http://www.cisco.com/go/marketplace/

• Cisco Press publishes a wide range of general networking, training and

certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:

http://www.ciscopress.com

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xix

Obtaining Additional Publications and Information

• Pack et magazine is the Cisco Systems technical user magazine for

maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can access Packet magazine at this URL:

http://www.cisco.com/packet

• iQ Magazine is the quarterly publication from Cisco Systems designed to

help growing companies learn how they can use technology to increase revenue, streamline their business, and expand services. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions. You can access iQ Magazine at this URL:

http://www.cisco.com/go/iqmagazine

• Internet Protocol Journal is a quarterly journal published by Cisco Systems

for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:

Preface

http://www.cisco.com/ipj

• World-class networking training is available from Cisco. You can view

current offerings at this URL:

http://www.cisco.com/en/US/learning/index.html

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CHA P T E R

Product Overview

The Cisco 831 router and Cisco SOHO 91 Ethernet-to-Ethernet routers can connect a corporate telecommuter or small office to an Internet service provider (ISP) over a broadband or Ethernet connection to the following sites:

• Corporate LANs

• The Internet

The Cisco 831 and SOHO 91 routers are switch-capable routers that provide a 4-port Ethernet switch for the LAN. The routers are capable of bridging and multiprotocol routing between LAN and WAN ports.

Cisco 831 and SOHO 91 routers support high-speed encryption, 10/100-Mbps switching, and dial backup functionality via the auxiliary console port. The autosensing function in the routers eliminates the need for a crossover cable and allows the routers to detect the medium dependent interface in normal mode (MDI) or medium dependent interface in crossover mode (MDIX) in any other PC/hub with a straight-through cable or crossover cable.

The dial backup function allows the user to connect an analog modem to the console port as a backup link to the WAN in case the ADSL service goes down. These features give the Cisco 831 and SOHO 91 routers a high level of performance and security.

The Cisco 831 router is designed with hardware-based encryption, while the Cisco SOHO 91 supports software-based encryption. The Cisco 831 router supports the ability to add Flash memory or SDRAM, either as a factory upgrade or a field-installed option. The SOHO 91 router has a fixed memory configuration.

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1-1

Chapter 1 Product Overview

Features

Table 1-1 summarizes the features of these routers.

Table 1-1 Feature Summary for Cisco 831 Router and SOHO 91 Router

Feature Description

10BASE-T/100BASE-T built-in switch ports

WAN port Provides connection to 10BASE-T. Compatible with 10-Mbps devices.

Flash memory 8 MB of Flash memory; up to 16 MB of expandable Flash memory on

Synchronous dynamic RAM (SDRAM)

Ease of installation Color-coded ports and cables reduce the chance of installation error.

Cisco IOS software Supports Cisco IOS software.

Cisco Router Web Setup application

Console port Provides a connection to the terminal or PC for software configuration

Wall-mount feature Brackets on router bottom provide a means for mounting the router on a

IPSec Hardware Accelerator

Provides connection to 10/100BASE-T (10/100-Mbps) Ethernet networks. Compatible with 10/100-Mbps devices.

Can be connected to other network devices, such as cable modem, ADSL, and router.

the Flash module.

32 MB of SDRAM on board.

Provides a web-based software tool for basic configurations and selected applications.

or troubleshooting using the command-line interface.

wall or vertical surface.

Only the Cisco 831 router supports this feature. The Hifn 7902 security processor implements symmetric key encryption, public key encryption, authentication and data compression in hardware. Algorithms implemented by the processor include Data Encryption Standard (DES) and Triple DES (3DES); Secure Hash Algorithm (SHA-1), Message Digest 5 (MD5), Hash-based Message Authentication Code (HMAC); and Lempel-Zif-Stac (LZS) compression; and Microsoft Point-to-Point Compression (MPPC).

1-2

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Chapter 1 Product Overview

Table 1-2 describes the ports on the Cisco 831 and SOHO 91 routers.

Table 1-2 Cisco 831 and SOHO 91 Router Ports

Router Built-In Switch WAN Ethernet Port Console Port

Cisco 831 Four 10/100 BASE-T

SOHO 91 Four 10/100 BASE-T

Router Overview

This section shows the front and back panels of the routers.

Front Panel

RJ-45

One 10BASE-T RJ-45

Router Overview

RJ-45

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Figure 1-1 shows the front panel of the Cisco 831 router (Figure 1-1 depicts the

front panel of a Cisco 831 router, but the front panel of the Cisco SOHO 91 router is the same).

Figure 1-1 Front Panel of Cisco 831 Router

RXD

TXD

INTERNET

RXD

COMPUTERS

SERIES

TXD

CISCO 800

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82020

Router Overview

Back Panel

Chapter 1 Product Overview

Figure 1-2 shows the back panel of the Cisco 831 router (Figure 1-2 depicts the

back panel of a Cisco 831 router, but the back panel of the Cisco SOHO 91 router is nearly identical).

ETHERNET 10BASET COMPUTERS (E0)

CONSOLE

Cisco 831

ETHERNET 10BASET

INTERNET (E1)

+18 VDC

82022

Figure 1-2 Cisco 831 Back Panel

1 Ethernet port 4 of the built-in

switch connects to Ethernet network devices

2 Ethernet port 3 of the built-in

switch connects to Ethernet network devices

3 Ethernet port 2 of the built-in

switch connects to Ethernet network devices

4 Ethernet port 1 of the built-in

switch connects to Ethernet network devices

5 Console port connects to PC or

terminal

6 WAN port connects to Internet or

switch

7 Input jack connects to power supply

8 Power on/off button

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Chapter 1 Product Overview

LED Functions

Table 1-3 summarizes the functions of the LEDs on the routers.

Table 1-3 Functions of LEDs on the Cisco 831 Router and SOHO 91 Router

LED Color Function

PWR_OK

WAN_LED_OK

WAN_LED_RxD

WAN_LED_TxD

E1 (port 1 of built-in switch) Status

E2 (port 1 of built-in switch) Status

E3 (port 1 of built-in switch) Status

E4 (port 1 of built-in switch) Status

LAN_RxD

LAN_TxD

Green On when DC power is being supplied to the router. The light blinks if an error

occurs during boot-up.

Green On when WAN Ethernet carrier detects status and connects to the digital

subscriber line access multiplexer (DSLAM) successfully.

Green Blinks when WAN Ethernet receives data.

Green Blinks when WAN Ethernet transmits data. Off when no data is being

uploaded.

Green On when Ethernet 1 connects to the Ethernet interface successfully. Blinks

when Ethernet 1 receives or sends data, or when data passes through Ethernet 1.

Green On when Ethernet 2 connects to the Ethernet interface successfully. Blinks

when Ethernet 2 receives or sends data, or when data passes through Ethernet 2.

Green On when Ethernet 3 connects to the Ethernet interface successfully. Blinks

when Ethernet 3 receives or sends data, or when data passes through Ethernet 3.

Green On when Ethernet 4 connects to the Ethernet interface successfully. Blinks

when Ethernet 4 receives or sends data, or when data passes through Ethernet 4.

Green Blinks when built-in Ethernet switch receives data from the WAN port.

Green Blinks when built-in Ethernet switch transmits data to the WAN port.

Router Overview

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Router Overview

Chapter 1 Product Overview

1-6

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Installation

This chapter provides information on the following topics:

• Preparing for Installation

• Preventing Damage to the Router

• Installing the Router

• Verifying Router Operation

• Mounting the Router

• Connecting to a Website

• What to Do If You Cannot Connect to a Website

Preparing for Installation

CHA P T E R

Safety

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This section provides information on safety, mounting of the router, and unpacking the router box.

This section provides the safety warnings and information about electrostatic and router damage that are applicable to the Cisco 831 and SOHO 91 routers.

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Preparing for Installation

Warnings

Chapter 2 Installation

Before installing the router, read the following warnings:

Warning

Read the installation instructions before you connect the system to its power source.

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

No operator serviceable parts inside. Refer servicing to qualified personnel.

Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.

This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors).

2-2

Warning

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

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Preparing for Installation

Warning

The ports labeled "10BaseT", 100BaseTX", and "10/100" are safety extra-low voltage (SELV) circuits. SELV circuits should only be connected to other SELV circuits. Avoid connecting these circuits to telephone network voltage (TNV) circuits.

To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.

Do not work on the system or connect or disconnect cables during periods of lightning activity.

This equipment is not designed for making emergency telephony calls when the power fails. Alternative arrangements should be made for access to emergency services. Access to emergency services can be affected by any call-barring function of this equipment.

If the symbol of suitability with an overlaid cross ( ) appears above a port, you must not connect the port to a public network that follows the European Union standards. Connecting the port to this type of public network can cause severe injury or damage your router.

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Warning

Before working on a system that has a standby/off switch, turn off the power by pressing the power switch to standby and unplug the power cord.

Ultimate disposal of this product should be handled according to all national laws and regulations.

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2-3

Preparing for Installation

Chapter 2 Installation

Warning

To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.

This equipment contains a ring signal generator (ringer), which is a source of hazardous voltage. Do not touch the RJ-11 (phone) port wires (conductors), the conductors of a cable connected to the RJ-11 port, or the associated circuit-board when the ringer is active. The ringer is activated by an incoming call.

During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) is a transfer of electrostatic charge between bodies of different electrostatic potentials, such as an operator and a piece of electrical equipment. It occurs when electronic components are improperly handled, and it can damage equipment and impair electrical circuitry. Electrostatic discharge is more likely to occur in the presence of synthetic fibers and dry atmosphere.

Always use the following ESD-prevention procedures when removing and replacing components:

2-4

Step 1 Wear an ESD-preventive wrist strap that you provide, ensuring that it makes good

skin contact.

Caution To properly guard against ESD damage and shocks, the wrist strap and cord must

operate effectively. Always follow the guidelines in the preceding section, “Warn ings .”

Step 2 Do not touch any exposed contact pins or connector shells of interface ports that

do not have a cable attached.

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Chapter 2 Installation

If cables are connected at one end only, do not touch the exposed pins at the unconnected end of the cable. This device is intended for use in residential and commercial environments only.

Caution Periodically check the resistance value of the antistatic strap, which should be

between 1 and 10 megohms (Mohms).

Unpacking the Box

Table 2-1 lists the items that come with your router. All these items are in the

accessory kit that is inside the box that your router came in. If any of the items is missing or damaged, contact your customer service representative.

Table 2-1 Router Box Contents

Power cord (black)

•

• Desktop power supply

• Console cable, RJ-45-to-DB-9 (light blue)

• Async modem cable for dial backup and remote

management, RJ-45-to-DB-25 (light blue) (ORDERED SEPARATELY)

• Two Ethernet cables (yellow)

• Product documentation

Preparing for Installation

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To prepare for installation, follow these steps:

Step 1 Obtain a broadband or Ethernet connection from your service provider.

Step 2 Remove the yellow Ethernet cables, light blue console cable, and product

documentation from the plastic bag. Remove the desktop power supply and the black power cord from the accessory kit. Gather the Ethernet devices to be connected to the router: hub, servers, workstations, or PCs.

Step 3 If you plan to configure the software using IOS commands via the console port,

provide a terminal or PC to connect to the console port.

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2-5

Preventing Damage to the Router

Step 4 If you plan to use the cable-lock feature, provide a Kensington or equivalent

locking cable.

Preventing Damage to the Router

Follow these guidelines when connecting devices to your router:

• Connect the color-coded cables supplied by Cisco Systems to the color-coded

ports on the back panel.

• If you must supply your own cable, see Appendix A for cabling

specifications. If this appendix does not provide specifications for a particular cable, we strongly recommend ordering the cable from Cisco Systems.

Installing the Router

Chapter 2 Installation

To install the router, you need to perform these tasks in the following order:

1. Connect the Ethernet devices to the router.

2. Connect the router to a broadband modem or Ethernet switch.

3. Connect a terminal or PC to the router (for software configuration using the

command-line interface [CLI] or troubleshooting).

4. Connect the router to the power source.

5. Verify the router installation.

6. Mount the router.

Connecting a Server, PC, or Workstation

Figure 2-1 shows a Cisco 831 router connecting to a PC. (Figure 2-1 shows a

Cisco 831 router, but it also applies to a SOHO 91 router.) To connect one of these devices to built-in Ethernet switch port 4, follow the steps given after Figure 2-1. (The connection procedure applies to both the Cisco 831 router and the SOHO 91 router.)

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Chapter 2 Installation

Installing the Router

Figure 2-1 Connecting a Server, PC, or Workstation

T 10B

Cisco 831

(E0)

T 10B

T (E

+18

OFF

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1 Cisco 831 router 4 PC

2 Yellow Ethernet cable 5 RJ-45 port on the network

interface card (NIC)

3 Built-in Ethernet switch port

4 on the router

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2-7

Installing the Router

Perform the following steps to connect the PC to port number 4 of the built-in switch:

Step 1 Connect one end of the yellow Ethernet cable to built-in Ethernet switch port 4 on

the router.

Step 2 Connect the other end of the cable to the RJ-45 port on the NIC installed in the

PC, server, or workstation.

Note Leave the PCs that you are connecting to the router turned off until after you

complete the router installation.

You can connect additional servers, PCs, or workstations to built-in Ethernet switch ports 1, 2, and 3.

Connecting an External Ethernet Switch (Optional)

Chapter 2 Installation

2-8

If more than four PCs need to be connected to each other in an office, you may connect an external Ethernet switch to the router’s built-in switch to add additional Ethernet connections to the router. To connect an external Ethernet switch to a built-in Ethernet switch port on the router, follow the steps given after

Figure 2-2. (Figure 2-2 shows a Cisco 831 router, but it also applies to a SOHO 91

router. The connection procedure applies to both the Cisco 831 router and the SOHO 91 router.)

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Chapter 2 Installation

Figure 2-2 Connecting to an Ethernet Switch

Cisco 831

)

CONSOLE

)

+18 VDC

1 X

SYSTEM

STATUS

MODE

DUPLX SPEED

1 0

RPS

UTIL

1 2

1 5 X

1 X

2 X

1 6 X

1 1

1 5

2 X

1 6 X

Catalyst 3500

SERIES

INLINE POWER

Installing the Router

OFF

82017

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1 Built-in Ethernet switch port 4

on the router

2 An available port on the external

Ethernet switch

Perform the following steps to connect the router to an external Ethernet switch:

Step 1 Connect one end of the yellow cable to built-in Ethernet switch port 4 on the

router.

Step 2 Connect the other end of cable to the available port on the Ethernet switch to add

additional Ethernet connections.

Turn on the Ethernet switch if it is not already turned on.

Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

2-9

Installing the Router

Connecting to the Internet

You can use an installed broadband modem to connect to the Internet.

Connecting a Broadband Modem

To connect to an installed DSL, cable, or long-reach Ethernet modem, follow the steps given after Figure 2-3. (Figure 2-3 shows a Cisco 831 router, but it also applies to a SOHO 91 router. The connection procedure applies to both the Cisco 831 router and the SOHO 91 router.)

Figure 2-3 Connecting to a Broadband Modem

ETH

ERN

ET 10BA

SET C

TER

Chapter 2 Installation

Cisco 831

S (E0)

ETH

ET 10BAS

TER

ET (E1)

OFF

2-10

1 Cisco 831 router’s Ethernet

2 An available port on the modem

Internet port

Perform the following steps to connect the router to an installed DSL, cable, or long-reach Ethernet modem:

Step 1 Connect one end of the yellow cable to the router’s Ethernet Internet port.

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Chapter 2 Installation

Step 2 Connect the other end of cable to the available port on the modem.

Follow the instructions provided with your broadband modem to determine which port on the modem to connect to. Turn on the broadband modem if it is not already turned on.

Note If the factory default configuration does not allow you to connect to the

Internet, it is recommended that you configure your router using the Cisco Router Web Setup (CRWS) software. The CRWS software is installed on your router at the factory. See the “What to Do If You Cannot Connect to a

Website” section on page 2-22 for instructions on starting the CRWS software.

Connecting a Terminal or PC to the Console Port

The console port is a service port to which you can connect a terminal or PC in order to configure the software by using the command-line interface (CLI) or to troubleshoot problems with the router. To connect a terminal or PC to the console port, follow the steps given after Figure 2-4. (Figure 2-4 shows a Cisco 831 router, but it also applies to a SOHO 91 router. The connection procedure applies to both the Cisco 831 router and the SOHO 91 router.)

Installing the Router

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2-11

Installing the Router

Chapter 2 Installation

Figure 2-4 Connecting a Terminal or PC to the Console Port

ETHERNET 10BASET COMPUTERS (E0)

Cisco 831

CONSOLE

ETHERNET 10BASET

INTERNET (E1)

+18 VDC

OFF

1 Console port on the router 2 DB-9 connector

Perform the following steps to connect the router’s console port to a terminal or PC:

Step 1 Connect the RJ-45 connector on the light blue cable to the router console port.

Step 2 Connect the DB-9 connector to a terminal or PC.

82018

Connecting the AC Adapter

To connect the AC adapter, follow the steps given after Figure 2-5. (Figure 2-5 shows a Cisco 831 router, but it also applies to a SOHO 91 router. The connection procedure applies to both the Cisco 831 router and the SOHO 91 router.)

Warning

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The device is designed to work with TN power systems.

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Chapter 2 Installation

Installing the Router

Warning

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 16A international) is used on the phase conductors (all current-carrying conductors).

Warning

This equipment is designed to be grounded. Ensure that the host is connected to earth ground during normal use.

Figure 2-5 Connecting the AC adapter

ETHERNET 10BASET COMPUTERS (E0)

Cisco 831

CONSOLE

ETHERNET 10BASET

INTERNET (E1)

+18 VDC

82019

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1 Cisco 831 router 4 Desktop power adapter

2 Router input jack 5 Power cord plug

3 Power cord

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Installing the Router

Perform the following steps to connect the router to the AC adapter:

Step 1 Connect one end of the power supply cable to the router’s input jack.

Step 2 Connect the other end of the power supply cable to the desktop power adapter.

Step 3 Plug the power cord of the desktop power adapter into an electrical outlet.

Connecting the Console Port to an Async Modem

The Cisco 831 router is designed with the dial backup function, which allows the user to connect an analog modem to the console port as a backup link to the WAN port in case the ADSL service goes down. The Cisco 831 router supports the dial backup and remote management features; the SOHO 91 router supports only the remote management function.

Note To connect an analog modem to the console port, you will need an optional

SOHO/800 Series Router Modem Cable. Contact your router vendor to order this cable.

Chapter 2 Installation

2-14

To connect the Cisco 831 router’s console port to an async modem, follow the steps given after Figure 2-6. The connection procedure applies only to a Cisco 831 router.

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Chapter 2 Installation

Installing the Router

Figure 2-6 Connect Console Port to an Async Modem

ETHERNET 10BASET COMPUTERS (E0)

CONSOLE

Cisco 831

ETHERNET 10BASET

INTERNET (E1)

+18 VDC

OFF

ABC3DEF

JKLGHI6MNO

TUVPQRS9WXYZ

OPER

82567

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1 Cisco 831 router’s console port 4 Wall jack

2 Router’s console port 5 Telephone

3 An available port on an async

modem

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2-15

Checking the PC Configuration

Perform the following steps to connect the Cisco 831 router’s console port to an async modem:

Step 1 Connect the RJ-45 end of the SOHO/800 Series Router Modem Cable to the Cisco

831 router’s console port.

Step 2 Connect the DB-25 connector end of the SOHO/800 Series Router Modem Cable

to an available port on the async modem.

Step 3 Connect one end of the RJ-11 cable to a wall jack.

Step 4 Connect the other end of the RJ-11 cable to a telephone line.

Checking the PC Configuration

Each PC that is connected to the router must be configured to use TCP/IP and to use DHCP automatically to obtain its IP address. Follow these steps to configure each PC that is running Microsoft Windows NT or Microsoft Windows 95, 98, or

2000. If the PC is running a different version of Microsoft Windows, refer to the documentation that came with the PC.

Chapter 2 Installation

2-16

Step 1 Start the PC, and open the Control Panel.

Step 2 Click the Network icon to display the Network window.

Step 3 Verify that TCP/IP has been added and associated with the Ethernet adapter.

TCP/IP is shown as a cable icon in the Configuration window on Microsoft Windows 95, 98 and 2000, and as a cable icon in the Protocol window on Microsoft Windows NT. If the icon is not visible, click Add, and add Microsoft TCP/IP.

Step 4 To verify that the PC is configured to obtain an IP address automatically, click

the TCP/IP cable icon, and select the IP address tab in the TCP/IP Properties window. If it is unchecked, check Obtain an IP address from a DHCP server. The IP address and Subnet mask fields should be grayed out.

Step 5 To accept all changes and exit this window, click OK. Then click OK in the

Network window.

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Chapter 2 Installation

Verifying Router Operation

Step 6 If you are prompted, click Ye s to reboot the PC.

For more information on how to configure TCP/IP, refer to the Cisco Router Web Setup Troubleshooting Guide, which is available on Cisco.com.

Verifying Router Operation

To verify that all PCs are properly connected to the router and that the router is properly connected to the broadband modem or Ethernet switch, turn on all connected devices, and then use Tabl e 2-2 on page 19 to help you verify correct router operation by checking the LEDs.

Table 2-2 Verifying Router Operation

Power/Link LEDs to Check Normal Patterns

Power OK On when power is supplied to router

To servers, PCs, or workstations connected to port 1, 2, 3, or 4 of the built-in Ethernet switch

COMPUTERS 1, 2, 3 or 4

INTERNET RXD

• COMPUTERS 1, 2, 3 or 4 is on when the

LAN port is physically connected to a server, PC, or workstation.

• INTERNET RXD blinks when a port on the

built-in Ethernet switch receives an Ethernet packet.

To broadband modem or external Ethernet switch

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INTERNET TXD

ETHERNET WAN

WA N R X D

WA N T XD

Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

• INTERNET TXD blinks when a port on the

built-in Ethernet switch sends an Ethernet packet.

• ETHERNET WAN is on when the

ETHERNET WAN port is physically connected to a broadband modem or external Ethernet switch.

• WAN RXD blinks when the ETHERNET

WAN port receives an Ethernet packet.

• WAN TXD blinks when the ETHERNET

WAN port sends an Ethernet packet.

2-17

Mounting the Router

You can mount your router on one of the following surfaces:

• Table or other horizontal surface

• Wall or other vertical surface

Mounting on a Table

Place the router on a table firmly, and perform the procedure in the “Installing the

Router” section on page 2-6. Do not cover or obstruct the router vents, which are

located on the router sides.

Caution The router vents cannot be covered or obstructed, otherwise overheating could

occur and cause damage to the router.

Chapter 2 Installation

Mounting on a Wall

You can mount the router on a wall or other vertical surface by using the molded mounting brackets on the bottom of the router and two number-six, 3/4-in. (M3.5 x 20 mm) screws. You must provide the screws. Figure 2-7 shows the mounting brackets.

Caution If you are mounting the router on drywall, use two hollow-wall anchors

(1/8 in. with 5/16-in. drill bit, or M3 with 8-mm drill bit) to secure the screws. If the screws are not properly anchored, the strain of the network cable connections could pull the router from the wall.

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Chapter 2 Installation

Mounting the Router

Figure 2-7 Wall-Mounting Brackets (Bottom of Router)

80289

1 Front panel of router 3 Distance between two mounting

brackets (7 5/8 inches or

19.35 cm)

2 Mounting bracket 4 Bottom of router

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The following conditions must be met when you mount the router:

Because you will use the LEDs as status and problem indicators, the front panel must face upward and be easily visible.

The router must be mounted low enough for you to see the LEDs in case you need to troubleshoot a problem.

The power supply must rest on a horizontal surface such as the floor or a table. If the power supply is not supported, it might place strain on the power supply cable and cause it to disconnect from the connector on the router back panel.

To mount the router, follow the steps given after Figure 2-8. Figure 2-9 shows a Cisco 831 router, but it also applies to the SOHO 91 router. The mounting procedure applies to both the Cisco 831 router and the SOHO 91 router.

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Mounting the Router

Figure 2-8 Mounting Router on Wall

Chapter 2 Installation

CISCO 800

ECO

MPUTERS

RXD

TXD

2-20

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Chapter 2 Installation

Connecting to a Website

1 Two number-six, 3/4 in.

screws

2 Distance between the two

screws on the wall (7 5/8 in. [19.35 cm])

3 Cisco 831 router 7 Distance between the screw and

4 Mounting brackets

Perform the following steps to mount the router on the wall:

Step 1 Secure two screws 7 5/8 inches (19.35 cm) apart into a wall and 1/8 inch (0.32 cm)

from the wall.

Step 2 Hang the router on the screws as shown in Figure 2-9.

Step 3 Place the power supply on a horizontal surface.

Connecting to a Website

5 Maximum distance between the

router and the power supply (6 ft [1.8m])

6 Horizontal surface on which to

place the power supply

the wall (1/8 in. [0.32 cm])

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The router has been configured to work for the most common type of installation. Log on to a PC that is connected to the router, open a web browser, and connect to a website. If you connected to a website, you have completed setup and can continue to use the router.

If you cannot display a website, make sure that the broadband modem or Ethernet switch that the router is connected to is operating, and try again. If you still cannot connect to a website, you must follow the steps in the “What to Do If You Cannot

Connect to a Website” section on page 2-22.

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Chapter 2 Installation

What to Do If You Cannot Connect to a Website

If you cannot connect to the Internet, using the factory configuration, or if you have loaded new Cisco IOS software on the router since you installed it, you can configure the router, using the Cisco Router Web Setup (CRWS) software. The CRWS software is already loaded on the router. This software is run from a PC connected to the router.

Starting the CRWS Software

Follow these steps to start the CRWS software:

Step 1 Start, or restart, a PC that is connected to one of the router’s built-in Ethernet

switch ports (1, 2, 3, or 4).

Step 2 Open a web browser. Make sure that the browser is set to work in online mode.

• In Internet Explorer, click the File menu, and verify that the “work offline”

option is unchecked.

2-22

• In Netscape, the default selection in the File menu is set to work online.

Step 3 Enter the following universal resource locator (URL):

http://10.10.10.1

Tip If the CRWS home page does not appear when you enter the URL

http://10.10.10.1, test the connection between the PC and the router by doing

the following:

1. Check that the OK LED on the router is on, and check the cable connection

between the router and the PC.

2. If the CRWS home page still does not appear, verify that the web browser’s

“work offline” option is disabled.

3. If the web page still does not appear, verify that the PC is automatically

configured to receive an IP address. Follow the instructions in the Cisco Router Web Setup User Guide, which is available on Cisco.com.

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Chapter 2 Installation

Step 4 Click the Router Setup link in the Cisco Router Web Setup home page, and

Step 5 When you complete setup using CRWS, connect to another website, using the

What to Do If You Cannot Connect to a Website

4. If the PC is configured to automatically receive an IP address, but the web

page still does not appear, select Start/Run, type winipcfg in the Run window, and examine the address in the IP address field. The address should be in the format 10.10.10.X, in which X is a number that is 2 or greater; for example, 10.10.10.2 or 10.10.10.3. If the IP address is not in this format, verify that an Ethernet adapter name is visible in the Adapter field. If it is not, return to Step 3 in the “Checking the PC Configuration” section on page 2-16 and add TCP to the list of protocols. Then return to the beginning of the

“Starting the CRWS Software” section on page 2-22, and complete the

procedure.

follow the instructions that appear in the page that is displayed.

connected PC. If you successfully connect to the website, then setup is complete, and you can continue using the router.

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What to Do If You Cannot Connect to a Website

Chapter 2 Installation

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CHA P T E R

Troubleshooting

This chapter describes problems that could occur with the router hardware, possible causes of the problems, and steps for solving the problems. The problems are grouped as follows:

• Problems During First Startup

• Problems After Router Is Running

For more information on problems that could occur with the software, refer to the

Cisco 800 Series Software Configuration Guide.

Before You Call Your Cisco Reseller

Some of the solutions in this chapter instruct you to contact your Cisco reseller. Before you contact your reseller, have the following information ready:

• Router model and serial number (on the back panel)

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• Maintenance agreement or warranty information

• Date you received your router

• Brief description of the problem

• Brief description of the steps you have taken to solve the problem

Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

3-1

Problems During First Startup

Table 3-1 lists problems that could occur the first time you turn on the router.

Table 3-1 Problems During First Startup

Symptom Problem Solutions

All LEDs, including OK LED, are off.

No connection to modem or Ethernet switch. (Internet LED is off.)

No power to router. Perform the following tasks in order:

1. Make sure that the power switch is set to ON.

2. Make sure that all connections to and from the power

supply are secure.

3. Make sure that the power outlet has power.

4. If the problem continues, the power supply could be

faulty. Contact your Cisco reseller.

A cable-related problem:

• Improperly

connected cable.

• Damaged cable.

Perform the following tasks in order:

1. To make sure that you have cabled the device

correctly, see the “Connecting a Server, PC, or

Workstation” section on page 2-6 or the “Connecting a Broadband Modem” section on page 2-10.

2. Make sure that the connectors at both ends of the

cable are securely seated.

3. Make sure that the cable is not physically damaged.

If it is damaged, order another cable from Cisco, or replace it with a similar cable.

Chapter 3 Troubleshooting

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Chapter 3 Troubleshooting

Table 3-1 Problems During First Startup (continued)

Symptom Problem Solutions

No connection to Ethernet devices.

(COMPUTER LEDs 1 through 4 are off.)

A cable-related problem:

• Improperly

connected cable.

• Damaged cable.

Perform the following tasks in order:

1. To make sure that you have cabled the device

correctly, see Figure 2-1 in the “Connecting a

Server, PC, or Workstation” section on page 2-6

2. Make sure that the connectors at both ends of the

cable are securely seated.

3. Make sure that the cable is not physically damaged.

If it is damaged, order another cable from Cisco Systems, or replace it with a similar cable.

Cannot connect to the Internet

• Broadband modem

or external Ethernet switch is not connected or turned on.

• There is a problem

with the broadband or WAN service.

• Router is

improperly configured.

• Reconnect the broadband modem or external

Ethernet switch, and make sure that it is receiving power.

• Check with the Internet service provider or

corporate network administrator to determine whether there is a problem.

• Use the Cisco Router Web Setup software to

configure the router. Follow the procedure in the

“What to Do If You Cannot Connect to a Website” section on page 2-22 (recommended), or configure

the router using a PC that is connected to the console port.

Problems During First Startup

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3-3

Problems After Router Is Running

Table 3-2 lists problems that could occur after the router has been up and running.

Table 3-2 Problems After Router Is Running

Symptom Problem Solutions

Problems with Ethernet connection. (COMPUTER LEDs 1 through 4 are off.)

Connection to the broadband or Ethernet line is intermittent or lost. (The INTERNET 1 LED on the front panel is off.)

A cable-related problem:

• Disconnected

cable.

• Damaged cable.

A cable-related problem:

• Disconnected

cable.

• Damaged cable.

Problem with broadband line or WAN service.

Perform the following tasks in order:

1. Make sure that the connectors at both

ends of the cable are secure.

2. Make sure that the cable is not

physically damaged. If it is damaged, order another cable from Cisco Systems, or replace it with a similar cable.

Perform the following tasks in order:

1. Make sure that the connectors at both

ends of the cable are secure.

2. Make sure that the cable is not

physically damaged. If it is damaged, order another cable from Cisco Systems, or replace it with a similar cable.

Contact your broadband line or WAN service provider to determine whether there is a problem.

Chapter 3 Troubleshooting

3-4

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APPENDIX

Specifications and Cables

This appendix provides system, port, and cabling specifications for the Cisco 831 and SOHO 91 routers.

System Specifications

Table A-1 outlines the system specifications for the routers.

Table A-1 System Specifications

Description Design Specification

Physical Dimensions

Dimensions (H x W x D) 2.0 x 9.7 x 8.5 in. (51 x 246 x 216 mm)

Weight (does not include desktop power supply) 1.5 lb (0.68 kg)

Environmental Operating Ranges

Nonoperating temperature –4 to 149°F (–20 to 65°C)

Nonoperating humidity 5 to 95% relative humidity

Nonoperating altitude 0 to 15,000 ft (4570 m)

Operating temperature 32 to 104°F (0 to 40°C)

Operating humidity 10 to 85% relative humidity

Operating altitude 0 to 10,000 ft (3000 m)

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Appendix A Specifications and Cables

System Specifications

Table A-1 System Specifications (continued)

Description Design Specification

Router Power

AC input voltage 100 to 240 VAC

Frequency 50 to 60 Hz

Power consumption Maximum of 18W

Voltage 18 VDC

For information on regulatory compliance, refer to the Regulatory Compliance and Safety Information for Cisco 800 Series and SOHO Series Routers document that was shipped with your router.

Warning

Ultimate disposal of this product should be handled according to all national laws and regulations.

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Appendix A Specifications and Cables

LAN Port

The Cisco 831 and SOHO 91 routers provide a fixed onboard LAN connection, which has a 10/100-Mbps wire-speed non-blocking switch controller that performs the 10BASE-T/100BASE-T Ethernet switch operation. The automatic medium dependent interface in normal mode (MDI)/medium dependent interface in crossover mode (MDIX) crossover function eliminates the need for crossover cables. Table A-2 provides pinouts for the Ethernet LAN port on the routers.

Table A-2 Ethernet LAN Port

Pin Function

1RX+

2RX–

3TX+

4Unused

5Unused

6TX–

7Unused

8Unused

LAN Port

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Console Connector Pinouts

Table A-3 provides pinouts for console connector (for connecting a terminal or

PC).

Table A-3 Console Connector Pinouts (RJ-45)

Pin Function

1RTS

2DTR

3TXD

4GND

5GND

6RXD

7DSR

8CTS

Appendix A Specifications and Cables

The console port is configured as a data communications equipment (DCE) device. The default parameters for the console port are as follows:

• 9600 baud

• 8 data bits

• No parity

• One stop bit

Cabling Specifications

This section provides specifications for the following Ethernet cables, which you might need to provide:

• Straight-through cable

• Crossover cable

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Appendix A Specifications and Cables

Thanks to the auto-crossover (autosensing) function, both straight-through and crossover cables can be used for the Ethernet LAN port.

Ethernet Cable Specifications

Table A-4 provides the specifications for straight-through and crossover Ethernet

cables.

Table A-4 Ethernet Cable Specifications

Type Category

10BASE-T Category 3 or 5

100BASE-T Category 5 or

above

Maximum Cable Distance

Cabling Specifications

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Table A-5 provides the maximum distance of Ethernet cables that you can use to

connect equipment to the router.

Table A-5 Maximum Cable Distance

Cable Maximum Distance

Ethernet cables 328 ft (100 m)

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Cabling Specifications

Appendix A Specifications and Cables

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INDEX

Numerics

100BASE-T 1-2

10BASE-T 1-2

AC adapter, connecting 2-12

accessory kit 2-5

AC input voltage A-6

adapter, included 2-5

altitude specifications A-5

autosensing function 1-1

back panel (figure) 1-4

broadband modem, connecting 2-10

caution, defined xii

Cisco reseller, contacting 3-1

Cisco Router Web Setup application 1-2

connecting

AC adapter

broadband modem 2-10

console port to async modem 2-14

external Ethernet switch, 2-8

PC 2-6

power supply 2-12

server 2-6

terminal or PC to console port 2-11

to the Internet 2-10

workstation 2-6

console port, connecting to async modem 2-14

console port, described 1-2

conventions xii

crossover cable 1-1

2-12

cables

included with router

maximum distance of A-9

specifications (table) A-9

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2-5

damage to the router, preventing 2-6

dial backup 1-1

documentation

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IN-1

Index

electrostatic damage, preventing 2-4

encryption, hardware-based 1-1

Ethernet cable, specifications A-9

feature summary (table) 1-2

Flash memory 1-2

frequency specifications A-6

front panel (figure) 1-3

hardware-based encryption 1-1

hazard, defined xii

high-speed encryption 1-1

humidity specifications A-5

installation

of the router

preparing for 2-1, 2-5

IPSec Hardware Accelerator 1-2

2-6

LAN port A-7

LEDs

summary of functions (table)

use in performing troubleshooting 3-2 to 3-4

1-5

mounting of the router, on table 2-18

PC, connecting to console port 2-11

PC configuration, checking 2-16

pinouts, console connector A-8

power

problems

specifications A-6

power supply, connecting 2-12

preventing damage to the router 2-6

problems

after router is running (table)

during first startup (table) 3-2

3-2

3-4

IN-2

router

unpacking

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safety warnings 2-2

SDRAM, definition 1-2

server, connecting 2-6

software-based encryption 1-1

specifications

Ethernet cable (table)

maximum cable distance (table) A-9

system A-5

startup problems 3-2

straight-through cable 1-1

system specifications (table) A-5

A-9

table mounting of router 2-18

temperature specifications A-5

terminal, connecting to console port 2-11

wall mounting of router

description

figure 2-20

WAN port 1-2

warning, defined xii

warnings, installation 2-2

weight specifications A-5

workstation, connecting 2-6

2-18

unpacking the router 2-5, ?? to 2-5

voltage specifications A-6

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Index

IN-4

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Cisco 831 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Cisco 831 Router and SOHO 91 Router Hardware Installation Guide

CONTENTS

Preface

Obtaining Documentation

Cisco.com

Documentation DVD

Ordering Documentation

Documentation Feedback

Cisco Product Security Overview

Reporting Security Problems in Cisco Products

Obtaining Technical Assistance

Cisco Technical Support Website

Submitting a Service Request

Obtaining Additional Publications and Information

Definitions of Service Request Severity

Product Overview

Features

Router Overview

Front Panel

Back Panel

LED Functions

Installation

Preparing for Installation

Safety

Unpacking the Box

Preventing Damage to the Router

Installing the Router

Connecting a Server, PC, or Workstation

Connecting an External Ethernet Switch (Optional)

Connecting to the Internet

Connecting a Terminal or PC to the Console Port

Connecting the AC Adapter

Connecting the Console Port to an Async Modem

Checking the PC Configuration

Verifying Router Operation

Mounting the Router

Mounting on a Table

Mounting on a Wall

Connecting to a Website

What to Do If You Cannot Connect to a Website

Starting the CRWS Software

Troubleshooting

Before You Call Your Cisco Reseller

Problems During First Startup

Problems After Router Is Running

Specifications and Cables

System Specifications

LAN Port

Console Connector Pinouts

Cabling Specifications

Ethernet Cable Specifications

Maximum Cable Distance

INDEX