Cisco 1721 User Manual

Cisco 1721 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-7813834= Text Part Number: 78-13834-02

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, Pa ck e t , 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 1721 Router Hardware Installation Guide

Preface xi

Audience and Scope xi Organization xi Related Documentation xii Conventions xiii

Notes, Cautions, and Warnings xiii Commands xvi

Obtaining Documentation xvi

Cisco.com xvii Documentation DVD xvii Ordering Documentation xvii

Documentation Feedback xviii

CHAPTER

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Cisco Product Security Overview xviii

Reporting Security Problems in Cisco Products xix

Obtaining Technical Assistance xix

Cisco Technical Support Website xx Submitting a Service Request xx Definitions of Service Request Severity xxi

Obtaining Additional Publications and Information xxii

1 Cisco 1721 Router Overview 1-1

Key Features 1-2 Back Panel Ports and LEDs 1-4 Front Panel LEDs 1-5

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Contents

Router Memory 1-7

Types of Memory 1-8

Amounts of Memory 1-8 Unpacking the Router 1-9 Additional Required Equipment 1-9

CHAPTER

2 Installation 2-1

Before Installing the Router 2-1 Connecting the Router to Your Local Network 2-2 Installing WICs 2-4

Safety Information 2-4

WIC Installation 2-5 Connecting Power to the Router 2-8 Verifying Your Installation 2-9 Optional Installation Steps 2-10

Connecting a PC 2-10

Connecting a Modem 2-12

Wall-Mounting 2-13

Stacking the Router 2-14

Unstacking the Router 2-17

3 Troubleshooting 3-1

Contacting Your Cisco Reseller 3-1 Recovering a Lost Password 3-2

Determining the Configuration Register Value 3-2

Resetting the Router 3-4

Resetting the Password 3-6

Resetting the Configuration Register Value 3-6

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Problem Solving 3-7

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OK LED Diagnostics 3-7

Troubleshooting WICs and Cables 3-8

Troubleshooting the Power System 3-10

Troubleshooting ISDN 3-11

Contents

APPENDIX

A Technical Specifications A-1

B Cabling Specifications B-1

Ethernet Cables B-1 Ethernet Network Cabling Guidelines B-2 Console Cable and Adapter B-3

C Installing and Upgrading Memory and Virtual Private Network Modules C-1

Safety Warnings C-1 Opening the Chassis C-2 Locating Modules C-4 Installing a DIMM C-5 Installing a VPN Module C-6 Closing the Chassis C-9

D Ordering and Configuring an ISDN Line D-1

ISDN BRI Line Configuration Requirements D-1

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ISDN BRI Switch Types D-2 ISDN BRI Provisioning by Switch Type D-3 Defining ISDN Service Profile Identifiers D-5 ISDN Configuration Options D-6

Snapshot Routing D-6

Dial-on-Demand Routing D-7

Cisco 1721 Router Hardware Installation Guide

NDEX

Contents

Bandwidth on Demand and Dial Backup D-7

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Preface

This section discusses the intended audience, scope, and organization of the Cisco 1721 Router Hardware Installation Guide and defines the conventions used to convey instructions and information.

Audience and Scope

This guide is for users who have some experience installing and maintaining networking hardware. Cisco 1721 router users should be familiar with the terminology and concepts of local Ethernet and wide-area networking.

This guide describes the functional and physical features of the Cisco 1721 router and provides installation procedures, troubleshooting information, technical specifications, and cable and connector guidelines and specifications.

Organization

This guide is organized as follows:

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• Chapter 1, “Cisco 1721 Router Overview,” describes the router features,

LEDs, and connectors.

• Chapter 2, “Installation,” describes how to install the router by connecting

cables and power, and tells how to install WAN interface cards (WICs).

• Chapter 3, “Troubleshooting,” describes some problems that you might have

with the router and how to solve these problems.

Cisco 1721 Router Hardware Installation Guide

Conventions

This guide uses the following conventions for information and instructions.

Notes, Cautions, and Warnings

Notes, cautions, and warnings use the following conventions and symbols:

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

materials not contained in this manual.

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

something that could result in equipment damage or loss of data.

Conventions

Warning

Waarschuwing

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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 standard practices for preventing accidents. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.

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. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.

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Conventions

Preface

Varoitus

Attention

Warnung

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. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

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. Pour prendre connaissance des traductions d’avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.

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. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.

xiv

Avvertenza

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. La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.

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Preface

Conventions

Advarsel

Aviso

¡Advertencia!

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. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.

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. Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.

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. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.

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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. Se förklaringar av de varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.

Cisco 1721 Router Hardware Installation Guide

Obtaining Documentation

Commands

Preface

Table 1 describes the syntax used with the commands in this document.

Table 1 Command Syntax Guide

Convention Description

boldface Commands and keywords.

italic Command input that is supplied by you.

[ ] Keywords or arguments that appear within square

brackets are optional.

{x | x | x} A choice of keywords (represented by x) appears in

braces separated by vertical bars. You must select one.

^ or Ctrl Represent the key labeled Control. For example, when

you read ^D or Ctrl-D, you should hold down the Control key while you press the D key.

screen font

boldface screen font

< > Nonprinting characters, such as passwords, appear in

[ ] Default responses to system prompts appear in square

Examples of information displayed on the screen.

Examples of information that you must enter.

angled brackets.

brackets.

Obtaining Documentation

Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.

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Preface

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

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.

Obtaining Documentation

Cisco Ordering tool:

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

Cisco Marketplace:

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

Ordering Documentation

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/

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xvii

Documentation Feedback

• 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.

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.

Preface

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.

• 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

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Preface

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

• 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

Obtaining Technical Assistance

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.

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Obtaining Technical Assistance

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

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

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Preface

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

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.

Obtaining Technical Assistance

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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.

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Preface

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

• 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:

xxii

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:

http://www.cisco.com/ipj

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Preface

Obtaining Additional Publications and Information

• 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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Obtaining Additional Publications and Information

Preface

xxiv

Cisco 1721 Router Hardware Installation Guide

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CHA P T E R

Cisco 1721 Router Overview

This chapter introduces the Cisco 1721 router, also referred to in this guide as the router, and covers the following topics:

• Key Features

• Back Panel Ports and LEDs

• Front Panel LEDs

• Router Memory

• Unpacking the Router

• Additional Required Equipment

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Cisco 1721 Router Hardware Installation Guide

1-1

Key Features

The Cisco 1721 router (see Figure 1-1) is a small, modular desktop router that links small- to medium-size remote Ethernet and Fast Ethernet LANs over one to four WAN connections to regional and central offices. Table 1-1 lists the key features of the router.

Figure 1-1 Cisco 1721 Router

Chapter 1 Cisco 1721 Router Overview

1-2

PWR

IC0

ACT/CH0

ETH

ACT

ACT/CH1

COL

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Cisco

1700

SERIES

ROUTER

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Chapter 1 Cisco 1721 Router Overview

Key Features

Table 1-1 Key Features

Feature Description

One Fast Ethernet (10/100BASE-TX) port

Two Cisco WAN interface card (WIC) slots

Console port Supports router configuration and management with a

Auxiliary port Supports modem connection to the router, which can be

VPN hardware-assisted 3DES encryption module

SNMP support Router can be managed over a network using Simple Network

AutoInstall support Configuration files can be easily downloaded to the router over

Kensington security slot Router can be secured to a desktop or other surface using

Cisco ConfigMaker support You can set up networks that include the Cisco 1721 router

Support for Cisco IOS software features

• Operates in full- or half-duplex mode (with manual

override available).

• Supports autosensing for 10- or 100-Mbps operation.

• Supports IEEE 802.1Q VLAN encapsulation.

• Supports a combination of any two of the following WICs:

ISDN BRI, 56-kbps DSU/CSU, FT1/T1 DSU/CSU, high-speed serial, dual-serial, ADSL, G.SHDSL, and Ethernet.

• The WAN interface configuration can be changed as your

network requirements change.

directly-connected terminal or PC. Supports up to 115.2 kbps.

configured and managed from a remote location. Supports up to

115.2 kbps.

Provides IPSEC DES and 3DES hardware encryption.

Management Protocol (SNMP).

a WAN connection.

Kensington lockdown equipment.

using the Cisco ConfigMaker application, a wizards-based software tool that helps you easily configure and address Cisco routers, access servers, hubs, switches, and networks.

Supports IP, IPX, AppleTalk, IBM, Open Shortest Path First (OSPF), NetWare Link Services Protocol (NLSP), Resource Reservation Protocol (RSVP), encryption, network address translation, and the Cisco IOS Firewall Feature Set.

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1-3

Back Panel Ports and LEDs

This section describes the router back panel ports and LEDs, which are shown in

Figure 1-2 and described in Tab le 1- 2 and Tab l e 1- 3 .

Figure 1-2 Back Panel Ports and LEDs

Kensington-compatible

locking socket

WIC 0 slot WIC 1 slot

Console port

Chapter 1 Cisco 1721 Router Overview

Power switch

CONSOLE

AUX

Auxiliary port

Model Cisco 1721

SEE MANUAL BEFORE INSTALLATION

WIC 0

OK LED

ALLPRD

56K

FDX LINK100WIC 0 OK WIC 1 OKMOD OK

FDX/100/

LINK LEDs

10/100 ETHERNET

10/100-Mbps Ethernet port

DSU

Table 1-2 Back Panel Connectors

Connector/Slot Label/Color Description

Ethernet port 10/100

ETHERNET (yellow)

Connects the router to the local Ethernet network through this port. This port autosenses the speed (10 Mbps or 100 Mbps) and duplex mode (full- or half-) of the device to which it is connected and then operates at the same speed and in the same duplex mode.

Auxiliary port AUX

(black)

Console port CONSOLE

(blue)

Connects to a modem for remote configuration with Cisco IOS software.

Connects to a terminal or PC for local configuration using Cisco IOS software.

MOD OK

LED

WIC 1 OK

+5, +12, -12 VDC

65524

Powe r socket

LED

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Front Panel LEDs

Table 1-2 Back Panel Connectors (continued)

Connector/Slot Label/Color Description

WIC slot 0 (WIC0)

WIC slot 1 (WIC1)

Table 1-3 Back Panel LEDs

LED Label Color Description

WIC0 OK Green On when a WIC is correctly inserted in the card slot.

FDX Green On solid—Ethernet port is operating in full-duplex mode.

100 Green On solid—Ethernet port is operating at 100 Mbps.

No label Supports one Cisco WIC. For detailed information, refer

to the Cisco WAN Interface Cards Hardware Installation Guide, which comes with every card.

No label Supports one Cisco WIC. For detailed information, refer

to the Cisco WAN Interface Cards Hardware Installation Guide, which comes with every card.

Use the back panel LEDs during router installation to confirm that you have correctly connected all the cables to the router.

Off—Ethernet port is operating in half-duplex mode.

Off—Ethernet port is operating at 10 Mbps.

LINK Green On when the Ethernet link is up.

MOD OK Green On when the VPN hardware encryption module is installed and

recognized by the IOS.

WIC1 OK Green On when a WIC is correctly inserted in the card slot.

Front Panel LEDs

Use the router front panel LEDs to determine network activity and status on the Ethernet port and on the WIC ports. The front panel LEDs are illustrated in

Figure 1-3 and described in Tab le 1- 4.

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Front Panel LEDs

Figure 1-3 Front Panel LEDs

Chapter 1 Cisco 1721 Router Overview

PWR

WIC0

ACT/CH0

ACT/CH1

WIC1

ACT/CH0

ACT/CH1

ETH

ACT

COL

65537

Table 1-4 Front Panel LEDs

LED Label Color Description

PWR Green On means that DC power is being supplied to the router.

OK Green On means that the router has successfully booted up and the software is

functional. This LED blinks during the power-on self-test (POST).

See the section “OK LED Diagnostics” in Chapter 3,

“Troubleshooting,” for information on how to use this LED for router

diagnostics.

WIC0

ACT/CH0 Green Serial and DSU/CSU cards—Blinks when data is being sent to or

received from the port on the card in the WIC0 slot.

ISDN cards—On solid when the first ISDN B channel is up for the card in the WIC0 slot.

2-port serial cards—Blinks when data is being sent to or received from the first port on the 2-port card in the WIC0 slot.

ACT/CH1 Green Serial and CSU/DSU cards—Remains off.

ISDN cards—On solid when the second ISDN B channel is up for the card in the WIC0 slot

2-port serial cards—Blinks when data is being sent to or received from the second port on the 2-port card in the WIC0 slot.

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+ 64 hidden pages

Cisco 1721 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

Preface

Audience and Scope

Organization

Related Documentation

Conventions

Notes, Cautions, and Warnings

Obtaining Documentation

Commands

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

Definitions of Service Request Severity

Obtaining Additional Publications and Information

Cisco 1721 Router Overview

Key Features

Back Panel Ports and LEDs

Front Panel LEDs