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Linksys BEFSR81v3 Router Manual PDF (Setup & Configuration Guide)

Given below is full router user manual of Linksys BEFSR81v3 router model. You can also download this manual in PDF Format to read later on your computer.

Product user manuals come handy in case you want to know all functionalities of your device, troubleshooting, fist time configuration & setup and in many other situations.

Page 1 / 53
Instant Broadband
®
Series
EtherFast
®
Cable/DSL
Router with QoS and
8-Port Switch
Use this guide to install:
BEFSR81 ver. 2
User Guide
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Page 2 / 53
COPYRIGHT & TRADEMARKS
Copyright © 2003 Linksys, All Rights Reserved.
Linksys is a trademark of Linksys.
Instant Broadband and EtherFast are a registered trademarks 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 with
QoS and 8-Port Switch 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
Specifications section of this User Guide. If the product proves defective during this war-
ranty period, call Linksys Technical 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 cus-
tomers located outside of the United States of America and Canada shall be held respon-
sible for shipping and handling charges.
IN NO EVENT SHALL LINKSYS’S LIABILITY EXCEED THE PRICE PAID FOR THE PROD-
UCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAM-
AGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFT-
WARE, OR ITS DOCUMENTATION. LINKSYS OFFERS NO REFUNDS FOR ITS PROD-
UCTS.
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 accom-
panying software, and specifically disclaims its quality, performance, merchantability, or
fitness for any particular purpose. Linksys reserves the right to revise or update its prod-
ucts, 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 with QoS and 8-Port Switch 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 turn-
ing 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
UG-BEFSR81 ver. 2-010803H-KL
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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
DMZ Host
52
QoS (Quality of Service)
53
MAC Address Clone
54
Appendix A: Troubleshooting
55
Common Problems and Solutions
55
Frequently Asked Questions
68
Appendix B: Glossary
72
Appendix C: How to Ping Your ISP’s E-mail &
Web Addresses
84
Appendix D: Installing the TCP/IP Protocol
87
Appendix E: Twisted-Pair Cabling
89
Crimping Your Own Network Cables
90
Appendix F: Finding the MAC Address and IP
Address for Your Ethernet Adapter
91
Appendix G: SNMP Functions
95
Appendix H: Specifications
96
Environmental
96
Appendix I: Warranty Information
97
Appendix J: Contact Information
98
Instant Broadband
®
Series
Table of Contents
Chapter 1: Introduction
1
The EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
1
Features
1
An Introduction to LANs and WANs
2
IP Addresses
2
Network Setup Overview
4
Chapter 2: Getting to Know the EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
5
The Router’s Back Panel
5
The Router’s Front Panel LEDs
6
Chapter 3: Connect the Router
8
Overview
8
Connecting Your Hardware Together and Booting Up
9
Chapter 4: Configure the PCs
11
Overview
11
Configuring Windows 95, 98, and Millennium PCs
12
Configuring Windows 2000 PCs
14
Configuring Windows XP PCs
16
Chapter 5: Configure the Router
18
Chapter 6: The Router’s Web-based Utility
24
Overview
24
Logging Onto the Web-based Utility
24
Setup
25
Password
32
Status
33
DHCP
35
Log
37
Security
38
Help
39
Advanced
40
IP Filtering
41
Port Range Forwarding
44
Dynamic Routing
49
Static Routing
50
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Instant Broadband
®
Series
EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
Chapter 1: Introduction
The Linksys EtherFast
®
Cable/DSL Router
The EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch is the perfect
solution for connecting multiple PCs (up to 253) to a high-speed Broadband
Internet connection on an Ethernet network. Configurable as a DHCP server
for your network, it acts as the only externally recognized Internet gateway on
your local area network (LAN).
The Router features such advanced functions as dynamic and static port rout-
ing, DMZ hosting, port filtering and forwarding, and Quality of Service capa-
bilities. And all of these functions can be easily configured through any net-
worked computer’s web browser.
•
Supports QoS for Data Prioritization Based on Ports and Internet Services
•
Supports VPN Pass-Through Using IPSec and PPTP Connections
•
Set up Your Computers and Router Easily Using Linksys Setup Wizard
•
Supports UPnP for Easy Network Configuration
•
Configure the Router through a Web Browser—Locally and over the Internet
•
Advanced Management Functions for Port Filtering, MAC Address Filtering,
and DMZ Hosting
•
8-Port Switch with Auto-Sense, Uplink Capabilities on Each LAN Port
•
Automatically Assigns IP Addresses to All Computers on Your Network
(DHCP Server)
2
The EtherFast
®
Cable/DSL Router with QoS and 8-Port
Switch
Features
Simply put, a
router
is a network device that connects two networks together.
In this instance, the Router connects your
Local Area Network (LAN)
, or the
group of PCs in your home or office, to the
Wide Area Network (WAN)
, which
is the Internet. The Router processes and regulates the data that travels between
these two networks.
Think of the Router as a network device with two sides:
the first side interacts
with your private
Local Area Network (LAN)
of PCs.
The other, public side
interacts with the Internet, or the
Wide Area Network (WAN)
, outside of your
home or office.
The Router’s firewall (NAT) protects your network of PCs so users on the public,
Internet side cannot “see” your PCs.
This is how your network remains private.
The Router protects your network by inspecting every data packet coming in
through the WAN port before delivery to the final destination on the LAN port.
The Router inspects Internet port services like the web server, ftp server, or other
Internet applications, and, if allowed, it will forward the packet to the appropriate
PC on the LAN side.
Remember that the Router’s ports connect to two sides. Your 10/100
LAN
port(s)
connect to the LAN, and the Internet
WAN
port connects to the WAN.
The LAN
port(s) transmit data at 10 Mbps or 100 Mbps, whereas the broadband port, or
WAN port, transmits data at 10 Mbps.
What’s an IP Address?
IP
stands for Internet Protocol. Every device on an IP-based network, including
PCs, print servers, and routers, requires an
IP address
to identify its “location,”
or address, on the network.
This applies to both the WAN and LAN connections.
There are two ways of assigning an IP address to your network devices. You can
assign static IP addresses or use the Router to assign IP addresses dynamically.
Static IP Addresses
A
static IP address
is a fixed IP address that you assign manually to a PC or
other device on the network.
Since a static IP address remains valid until you dis-
able it,
static IP addressing
ensures that the device assigned it will always have
that same IP address until you change it.
Static IP addresses are commonly used
with network devices such as server PCs or print servers.
An Introduction to LANs and WANs
IP Addresses
1
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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
By default, the Router can act as a DHCP server for your LAN.
If you already
have a DHCP server running on your network, you
must
disable one of the two
DHCP servers. If you run more than one DHCP server on your network, you
will experience network errors, such as conflicting IP addresses. To disable
DHCP on the Router, see the DHCP section in “Chapter 6: The Router’s Web-
based Utility.”
This user guide covers the basic steps for setting up a network with the Router.
After going through “Chapter 2: Getting to Know the EtherFast Cable/DSL
Router with QoS and 8-Port Switch,” most users will only need to use the fol-
lowing chapters:
•
Chapter 3: Connect the Router
This chapter instructs you on how to connect a cable or DSL modem to the
Router and connect your PC(s) to the Router.
•
Chapter 4: Configure the PCs
This chapter instructs you on how to configure your PC(s) for a DHCP con-
nection, if the network settings are not already set to DHCP.
•
Chapter 5: Configure the Router
This chapter explains how to configure the Router using your web browser
and the Router’s web-based utility. You will configure the Router using the
settings provided by your ISP.
When you’re finished with the basic steps, then you are ready to connect to the
Internet. After the PC(s) can access the Internet through the Router, you can
alter the Router’s settings further; for example, you can adjust security features
and other settings to enable online gaming.
4
Instant Broadband
®
Series
3
Note:
Even if you assign a static IP address to a PC, other PCs can
still use DHCP’s dynamic IP addressing, as long as the static IP
address is not within the DHCP range of the LAN IP Addresses.
If the dynamic IP addressing fails to provide a dynamic IP address,
refer to “Appendix A: Troubleshooting.”
If you use the Router to share your cable or DSL Internet connection, contact
your ISP to find out if they have assigned a static IP address to your account.
If so, you will need that static IP address when configuring the Router. You can
get that information from your ISP.
Dynamic IP Addresses
A
dynamic IP address
is automatically assigned to a device on the network,
such as PCs and print servers.
These IP addresses are called “dynamic”
because they are only
temporarily
assigned to the PC or device.
After a certain
time period, they expire and may change. If a PC logs onto the network (or the
Internet) and its dynamic IP address has expired, the
DHCP server
will assign
it a new dynamic IP address.
For DSL users, many ISPs may require you to log on with a user name and
password to gain access to the Internet. This is a dedicated, high-speed con-
nection type called Point to Point Protocol over Ethernet (PPPoE). PPPoE is
similar to a dial-up connection, but PPPoE does not dial a phone number when
establishing a connection. PPPoE also will provide the Router with a dynamic
IP address to establish a connection to the Internet.
DHCP (Dynamic Host Configuration Protocol) Servers
PCs and other network devices using dynamic IP addressing are assigned a new
IP address by a
DHCP server
. The PC or network device obtaining an IP
address is called the DHCP client. DHCP frees you from having to assign IP
addresses manually every time a new user is added to your network.
A DHCP server can either be a designated PC on the network or another net-
work device, such as the Router. By default, the Router’s WAN setting is DHCP
client.
Note:
Since the Router is a device that connects two networks, it
needs two IP addresses—one for the LAN, and one for the WAN.
In
this User Guide, you’ll see references to the “WAN IP address” and
the “LAN IP address.”
Since the Router has firewall security (NAT), the only IP address that
can be seen from the Internet for your network is the Router’s WAN IP
address.
However, even this WAN IP address can be blocked, so that the Router
and network seem invisible to the Internet—see the Blocking WAN
Requests description under IP Filtering in “Chapter 6: The Router’s
Web-based Utility.”
Network Setup Overview
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