Linksys BEFSR81 User Manual
Instant Broadband™ Series
EtherFast Cable/DSL
Router
Model No.: BEFSR81
User Guide
COPYRIGHT & TRADEMARKS
Copyright © 2000 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 is free
from physical defects in material and workmanship under normal use for one year from
the date of purchase. 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 AND A BARCODE FROM THE PRODUCT'S
PACKAGING ON HAND WHEN CALLING. RETURN REQUESTS CANNOT BE
PROCESSED WITHOUT PROOF OF PURCHASE. When returning a product, mark the
Return Authorization Number clearly on the outside of the package and include your
original proof of purchase.
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 DOES NOT OFFER REFUNDS FOR ANY
PRODUCT. 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
This 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 device
• Connect the equipment to an outlet other than the receiver’s
• Consult a dealer or an experienced radio/TV technician for assistance
010
Instant Broadband Series EtherFast Cable/DSL Router
Introduction
The Linksys EtherFast Cable/DSL Router
Congratulations on your purchase of a Linksys Instant Broadband EtherFast
Cable/DSL Router. The EtherFast Cable/DSL Router is the perfect option to
connect a small group of PCs to a high-speed Broadband Internet connection
or to an Ethernet backbone. Configurable as a DHCP server, the EtherFast
Cable/DSL Router can act as the only externally recognized Internet gateway on
your local area network (LAN) and, with QoS, you can prioritize performance for
FTP, HTTP, and other services. The Router serves as an Internet firewall, shielding
your network from unwanted access and monitoring and filtering all incoming
data packets. The Router can also be configured to filter internal users' access to
the Internet.
Not only will all of your PCs now be able to enjoy your lightning-fast
Broadband Internet connection, they will also be able to share internal network data. Add it all together and your small network will hum along faster
than you ever thought possible.
Features
• Connects to a Broadband modem or to an Ethernet backbone.
• Equipped with an 8-port 10/100 Switch. Manually select port eight as the
uplink port.
• Connects all of your PCs to the Internet with only one purchased IP address.
• Creates a firewall to protect your PCs from outside intruders.
• Configurable through any networked PC's web browser using Netscape or
Internet Explorer, versions 4.0 or higher.
• The switch dramatically speeds up your gaming and multimedia connections.
• QoS (Quality of Service) allows you to prioritize performance.
• Can simultaneously act as both a DHCP Server on the LAN and a DHCP
Client on the WAN.
• Compatible with virtually all standard Internet applications.
• Administrators can block specif ic interior users' Inter net access.
• DMZ Host option provides two-way communication between one PC and
your Internet services.
Table of Contents
Introduction 1
The Linkys EtherFast Cable/DSL Router 1
Features 1
Package Contents 2
System Requirements 2
Getting to Know the
8-Port EtherFast Cable/DSL Router 3
The 8-Port Router’s Rear Panel 3
The Reset Button 4
The 8-Port Router’s Front Panel LEDs 4
Connecting The Cable/DSL Router to
Your Network 6
Overview 6
About Static & Dynamic IP Addresses 6
Connecting Everything Together & Booting Up 7
Configuring Your Network with
the Cable/DSL Router 9
Configuring The Cable/DSL Router 9
Configuring Your PCs to Connect to the Cable/DSL Router 12
The Cable/DSL Router’s Web-based Utility 15
Troubleshooting 30
Appendix 36
SNMP Functions 36
How to Ping Your ISP’s E-mail & Web Addresses 36
Installing the TCP/IP Protocol 39
Twisted-Pair Cabling 41
Crimping Your Own Network Cables 42
8-Port Router Specifications 43
Customer Support 44
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EtherFast Cable/DSL Router
3
Getting to Know the 8-Port
EtherFast Cable/DSL Router
The 8-Port Router’s Rear Panel
The rear panel of the Router is where all of the Router’s connections are
made.
The 8-Port Router’s Ports
WAN The WAN (Wide Area Network) Port is where you
will connect your cable or DSL modem.
Ports 1-8 These eight LAN (Local Area Network) por ts are
where you will connect networked devices, such as
PCs, print servers, remote hard drives, and anything else you want to put on your network.
Uplink T o ggle The Uplink Toggle allows you to manually select
Port Eight as an Uplink Port so that you can
expand your network by connecting to another
switch or hub. Uplinking to another Router, switch
or hub is done by simply selecting the crossed setting and running a cable from Port Eight to the
device.
Power The Power Port is where you will connect the
included AC Po wer adapter.
Instant Broadband Series
Package Contents
• One Linksys Instant Broadband Cable/DSL Router
• One power adapter
• One power cord
• One user guide and registration card
System Requirements
• One RJ-45 Broadband Internet connection
• One PC with an installed 10Mbps, 100Mbps, or 10/100 Mbps Ethernet card
• TCP/IP network protocol for each PC
• UTP network cable with RJ-45 connector
• Microsoft Internet Explorer 4.0 or later, or Netscape Navigator 4.0 or later.
(5.0 and 4.7, respectively, are strongly recommended.)
2
EtherFast Cable/DSL Router
Full/Col Green. The Full/Col LED also serves two purposes. If this
LED is continuously illuminated, the connection made
through the corresponding port is successfully running in
Full Duplex mode. If the LED is flickering, the connection
is experiencing collisions. Infrequent collisions are normal.
If this LED is flickering too often, there may be a problem
with your connection. Check the Troubleshooting section on
page 30 if you think there is a problem.
100 Orange. The 100 LED illuminates when a successful
100Mbps connection is made through the corresponding
port.
The WANIndicators
Link Green. The Link LED illuminates when a successful con-
nection is made between the Router and your Broadband
device or network.
Act Green. The Act LED flickers when the Router is sending or
receiving data over the broadband port.
Diag Red. The Diag LED illuminates when the Router goes
through its self-diagnosis mode during boot-up. It will turn
off upon successful completion of the diagnosis. If this
LED stays on for an abnormally long period of time, refer
to Troubleshooting on page 30.
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Instant Broadband Series
The Reset Button
Briefly pressing the Reset Button will refresh the Router’s connections, potentially clearing any jammed links.
Pressing the Reset Button and holding it in for a few seconds will
clear all of the Router’s data. This should be done only if you are experiencing heavy routing problems, and only after you have exhausted all of the
other troubleshooting options. By resetting the Router, you run the risk of
creating conflicts between your PCs’actual IP Addresses and what the Router
thinks their IP Addresses should be. You may be forced to reboot the entire
system(s).
If the Router locks up, simply power it down for 3 to 5 seconds by removing
the power cable from the Router’s Power Port. Leaving the power off for too
long could result in the loss of network connections.
The 8-Port Router’s Front Panel LEDs
The LAN Indicators
Power Green. The Power LED illuminates when the Router is pow-
ered on.
Link/Act Green. The Link/Act LED serves two purposes. If the LED
is continuously illuminated, the Router is successfully connected to a device through the corresponding port (1-8). If
the LED is flickering, the Router is actively sending or
receiving data over that port.
4
EtherFast Cable/DSL Router
7
Instant Broadband Series
6
Dynamic IP Addresses A dynamic IP address is an IP address that is automatically assigned to a client station (computer, printer, etc.) in a TCP/IP network.
Dynamic IP addresses are typically assigned by a DHCP server, which can be
a computer on the network or another piece of hardware, such as the Router.
A dynamic IP address may change every time your computer connects to the
network.
DHCP (Dynamic Host Configuration Protocol) DHCP is software that automatically assigns IP addresses to client stations logging onto a TCP/IP network.
DHCP eliminates having to manually assign permanent IP addresses to every
device on your network. DHCP software typically runs in servers and is also
found in network devices such as Routers.
Connecting Everything Together & Booting Up
Once you are sure that you
have the above values on hand,
you can begin the Installation
and Setup of the Cable/DSL
Router.
1. Power everything down,
including your PCs, your
Cable or DSL modem and
the Router.
2. Connect a Network cable
from one of your PCs’
Ethernet ports to one of the
LAN Ports on the back of
the Router. Do the same with all the PCs you wish to connect to the
Router. (LAN Por t 8 will become inactive if you toggle the Uplink port.)
3. Connect the network cable from your Cable or DSL modem to the WAN
port on the rear of the Router.
NNoottee::
Some ISPs—most notably
some cable providers—configure
their networks so that you do not
have to enter a full Internet address
into your web browser or e-mail
application to reach your home page or receive
your e-mail. If your Internet home page address is
something very simple, such as “www”, rather
than “www.linksys.com”, or your e-mail server’s
address is something similar to “e-mail” or “pop3”,
rather than “pop.mail.linksys.com”, you won’t be
able to properly configure the Cable/DSL Router
until you determine the actual Internet addresses
of your Web and e-mail connections.
You
mmuusstt
obtain this information prior to connecting the Router to your network. You can obtain this
information by contacting your ISP, or turn to page
35 to learn how to
ping
for an IP address.
Connecting The Cable/DSL Router
to Your Network
Overview
Unlike a simple hub or switch, the setup of the Cable/DSL Router consists of
more than simply plugging everything together. Because the Router acts as a
DHCP server, you will have to set some values within the Router, and also
configure your networked PCs to accept the IP Addresses the Router chooses
to assign them.
You will need the following values from your ISP in order to install the
Cable/DSL Router:
• Your broadband-configured PC’s f ixed Internet IP Address (if applicable)
• Your broadband-configured PC’s Computer Name and Workgroup Name
• Your Subnet Mask
• Your Default Gateway
• Your Primary DNS IP address
Whoever installed your broadband access should have left this infor mation
with you. If not, call your ISP and they will be able to supply you with it.
About Static & Dynamic IP Addresses
Static IP Addresses A static IP address is an IP address permanently assigned
to a computer in a TCP/IP network. Static IP addresses are usually assigned
to networked devices which are consistently accessed by multiple users, such
as Server PCs, or printers. If you are using the Router to share your cable or
DSL Internet connection, contact your ISP to see if they have assigned your
home a static IP address. You will need that address during the Router’s configuration.
}
Only if applicable
EtherFast Cable/DSL Router
Configuring Your Network with the
Cable/DSL Router
Now that the Cable/DSL Router is wired into your network, you can begin conf iguring your system.
1. Open your web browser and type http://192.168.1.1 in the
browser’s Address box. This number is the default IP address of the Router.
Press Enter.
2. A User Name and password prompt will appear. Leave the User Name
box empty and type admin (the default password) in the Password box.
Click OK.
9
Instant Broadband Series
4. Connect the power-supply cable to the Power port on the rear of the
Router, then plug the supplied AC power cable into a power outlet. Plug the
other end into the back of the power adapter.
• The Power LED will illuminate green as soon as the power adapter is
connected.
• The Diag LED will illuminate red for a few seconds while the Router
goes through its internal diagnostic test. The LED will turn off when the
self-test is complete.
5. Power on the Cable or DSL modem.
6. Press the Reset button on the back of the Router. Hold the button in for
three seconds, or until the Diag LED illuminates red. This restores the
router’s default settings.
The Hardware Installation is complete.
8
Configuring the Cable/DSL Router
NNoottee::
If the TCP/IP
protocol is not configured on your PC, go
to page 38 of the
Appendix for TCP/IP
installation instructions now.
NNoottee::
If you have previously enabled an Internet Sharing Proxy
Service on any of your PCs, you must disable it now.
• If you are running Netscape Navigator: Click
EEddiitt
>>
PPrreeffeerreennccee
>>
AAddvvaanncceedd
>>
PPrrooxxiieess
> and click
DDiirreecctt CCoonnnneeccttiioonn ttoo tthhee IInntteerrnneett
.
• If you are running Internet Explorer v5 or better, click
SSttaarrtt
>>
SSeettttiinnggss
>>
CCoonnttrrooll PPaanneell
>>
IInntteerrnneett OOppttiioonnss
>>
CCoonnnneeccttiioonnss
>>
LLAANN SSeettttiinnggss
. Remove
the checks from all three boxes. Click
OOKK
to continue.
EtherFast Cable/DSL Router
11
Instant Broadband Series
10
LAN IP Address These values refer to your
internal network settings. Unless you have
specific inter nal needs, there should be no
reason to change these values. For the internal LAN, the default values are as follows.
• Private IP Address: 192.168.1.1
• Subnet Mask: 255.255.255.0
WAN IP Address These values refer to the
outside network you connect to every time
you access your Broadband Internet connection. Most Broadband ISPs assign their clients with a different IP address
each time they log on. If this is the case with your ISP, click Obtain an
IP Address Automaticall y and continue to step 5. If your ISP assigns
you a fixed IP address, click Specify an IP Address and enter the
address into the Subnet Mask, Default Gateway Address and DNS
fields provided by the ISP.
To enable PPPoE support, choose Enable, and enter your User
Name and Password. If you do enable PPPoE, remember to
remove any existing PPPoE applications already on your computer. (More information on PPPoE can be found on page 17.)
5. When you have properly configured the Setup page, click Apply, then
click Continue.
6. Choose the DHCP tab.
NNoottee::
If you have an existing
DHCP server on your LAN
and you don’t wish to use
the router as your new
DHCP server, you must
assign your router a static IP
address. The router’s IP
address must be compatible
with your existing network.
You can not have two DHCP
servers running on one LAN
at the same time.
3. The Cable/DSL Router’s Setup page will appear.
4. Configure the following values.
Router Name & Domain Name These fields allow you to supply a host
and domain name for the Router. Some ISPs require these names as
identification. You may have to check with your ISP to see if your
Broadband Internet service has been configured with a host and domain
name. In most cases, leaving these fields blank will work.
NNoottee::
The setup page
shown in the graphic
above may differ from
the one seen on your
router.
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