Instant Broadband $ ^{TM} $ Series

EtherFast $ ^{\textregistered} $ Cable/DSL Routers

LINKBYB LINKBYB

Use this User Guide to install the following Linksys product(s):

BEFSR41 ver. 2 EtherFast Cable/DSL Router with 10/100 4-Port Switch

BEFSRU31 EtherFast Cable/DSL Router with USB Port and 10/100 3-Port Switch

BEFSR11 ver. 2 EtherFast 1-Port Cable/DSL Router

User Guide

COLINKSYS®

COPYRIGHT & TRADEMARKS

Copyright © 2002 Linksys, All Rights Reserved. Instant Broadband is a registered trademark of Linksys. Microsoft, Windows, and the Windows logo are registered trademarks of Microsoft Corporation. All other trademarks and brand names are the property of their respective proprietors.

LIMITED WARRANTY

Linksys guarantees that every Instant Broadband EtherFast Cable/DSL Router will be free from physical defects in material and workmanship for one year from the date of purchase, when used within the limits set forth in the Specification section of this User Guide. If the product proves defective during this warranty period, call Linksys Customer Support in order to obtain a Return Authorization number. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. When returning a product, mark the Return Authorization number clearly on the outside of the package and include a copy of your original proof of purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. All customers located outside of the United States of America and Canada shall be held responsible for shipping and handling charges.

IN NO EVENT SHALL LINKSYS' LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS DOCUMENTATION. LINKSYS OFFERS NO REFUNDS FOR ITS PRODUCTS. Linksys makes no warranty or representation, expressed, implied, or statutory, with respect to its products or the contents or use of this documentation and all accompanying software, and specifically disclaims its quality, performance, merchantability, or fitness for any particular purpose. Linksys reserves the right to revise or update its products, software, or documentation without obligation to notify any individual or entity. Please direct all inquiries to:

Linksys P.O. Box 18558, Irvine, CA 92623.

FCC STATEMENT

The Instant Broadband EtherFast Cable/DSL Router has been tested and complies with the specifications for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used according to the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which is found by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna

• Increase the separation between the equipment or devices

• Connect the equipment to an outlet other than the receiver's

• Consult a dealer or an experienced radio/TV technician for assistance

Table of Contents

Introduction 1
The Linksys EtherFast Cable/DSL Router 1
Features 1
Package Contents for the 4-Port Router (BEFSR41) 2
System Requirements 2
Package Contents for the 1-Port Router (BEFSR11) 3
System Requirements 3
Package Contents for the 3-Port Router (BEFSRU31) 4
System Requirements 4
Getting to Know the 4-Port EtherFast Cable/DSL Router 5
The 4-Port Router's Rear Panel 5
The 4-Port Router's Front Panel LEDs 6
Getting to Know the 1-Port EtherFast Cable/DSL Router 8
The 1-Port Router's Rear Panel 8
The 1-Port Router's Front Panel LEDs 9
Getting to Know the 3-Port EtherFast Cable/DSL Router 11
The 3-Port Router's Rear Panel 11
The 3-Port Router's Front Panel LEDs 13
Connecting the Cable/DSL Router 15
to Your Network 15
Overview 15
LANs and WANs 15
IP Addresses: A Quick Lesson 16
Connecting Your Hardware Together & Booting Up 18
Uplinking: Connecting More Devices to Your Router 20
Installing the BEFSRU31's USB Port Drivers 21
Installing the Windows 98 Driver 21
Installing the Windows 2000 Driver 25
Installing the Windows Millennium Driver 29
Installing the