ELSA LANCOM Wireless L-II User manual

ELSA LANCOMTM Wireless L-II
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© 2000 ELSA AG, Aachen (Germany)
While the information in this manual has been compiled with great care, it may not be deemed an assurance of product
characteristics. ELSA shall be liable only to the degree specified in the terms of sale and delivery.
The reproduction and distribution of the documentation and software supplied with this product and the use of its contents
is subject to written authorization from ELSA. We reserve the right to make any alterations that arise as the result of
technical development.
ELSA is DIN EN ISO 9001 certified. The accredited TÜV CERT certification authority has confirmed ELSA conformity to the
worldwide ISO 9001 standard in certificate number 09 100 5069, issued on June 15, 1998.
You can find all declarations and approvals for the products, as long as they were available at the time of publication, in
the appendix of this documentation.
Trademarks
Windows®, Windows NT®and Microsoft®are registered trademarks of Microsoft, Corp.
The ELSA logo is a registered trademark of ELSA AG. All other names mentioned may be trademarks or registered
trademarks of their respective owners
ELSA Subject to change without notice. No liability for technical errors or omissions.
ELSA AG
Sonnenweg 11
52070 Aachen
Germany
www.elsa.com
Aachen, October 2000
100325/1000
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Preface
Thank you for placing your trust in this ELSA product.
Wireless networks from ELSA are economical alternatives or additions to
local wired networks (LANs). Notebooks and PCs can use mobile network
cards to communicate with one another or access wired networks via access
points and can even be integrated into the high-speed Internet via the DSL
firmware option.
Documentation
The accompanying documentation comprises:
Manual
Hardware installation, description of the functions, operating modes and
sample configurations
CD containing electronic documentation
All product manuals, basic technical information (e.g. wireless networks,
general networking technology, TCP/IP etc.), workshop with detailed
examples of applications, reference section for general information
including a complete description of the menus.
Our online services (www.elsa.com) are available to you around the clock
should you have any queries regarding the topics discussed in this manual or
require any further support. In the Support file section under 'Know-how', you
can find answers to frequently asked questions (FAQs). The KnowledgeBase
also contains a large pool of information. Current drivers, firmware, tools and
manuals can be downloaded at any time.
The KnowledgeBase can also be found on the CD. Just open the file
\Misc\Support\MISC\ELSASIDE\index.htm.
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Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 The basic functions of a wireless network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 What does the ELSA LANCOM Wireless L-11 offer? . . . . . . . . . . . . . . . . . . . . . . . 10
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3 Install TCP/IP on your workstation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3.1 Windows 95 and Windows 98 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3.2 Windows NT 4.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.3 Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.4 Introducing the ELSA LANCOM Wireless L-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.4.1 The front of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.4.2 The bottom of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.5 How to connect the device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.6 Software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.7 Quickstart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.7.1 The Wizards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.7.2 Basic settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3 Configuration and management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.1 Radio or wired: Configuration approaches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2 Configuration using ELSA LANconfig. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3 Configuration with ELSA WEBconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.4 Configuration using Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.5 Configuration using SNMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.6 New firmware with FirmSafe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.6.1 This is how FirmSafe works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.6.2 How to load new software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.7 What's happening on the line? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.8 ELSA LANmonitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.9 DSL firmware for ELSA LANCOM Wireless. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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4 Operating modes and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.1 Establishing wireless connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.1.1 Considerations for setting up a wireless network . . . . . . . . . . . . . . . . . . . . . 42
4.1.2 Ad hoc network (peer-to-peer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.1.3 Infrastructure network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.1.4 Point-to-point network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.1.5 Wireless Internet gateway via DSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.2 Security for your configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.1 Security for the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.2 Security for your WLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.2.3 Security for your LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.3 Call charge management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.4 Automatic address administration with DHCP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.4.1 The DHCP server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.4.2 DHCP –'on', 'off' or 'auto'? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.4.3 How are the addresses assigned? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.4.4 Configuring the DHCP server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.5 Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.5.1 Configuring accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.5.2 Reading the accounting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
5 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.1 Power and ratings data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.2 Radio frequency channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6.1 Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6.2 General warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
7 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
LANCOM Wireless reference manual on CD
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1 Introduction
The advantages of wireless LANs are obvious: Notebooks and PCs can be set
up where they are wanted—problems with missing ports or construction al-
terations are a thing of the past with wireless networking.
Network links in conferences or presentations, access to resources in adja-
cent buildings and exchanging data with mobile units are only a few of the
options available with a wireless LAN.
The access point plays the central role in enabling these options in an exist-
ing wired network. All stations in the wireless network access the LAN via
the access point.
The WAN functions mentioned and described in this manual are only avail-
able after a firmware upgrade to the DSL version.
Notes on using wireless LAN devices
ELSA Wireless LAN products can use up to 13 radio frequency channels in a
frequency band between 2400 MHz and 2483 MHz. The devices are approved
for operation in all EU countries and Switzerland. Use of the devices is reg-
ulated throughout Europe by the 1999/5/EG guideline of the European Parlia-
ment and Council Directive of 9 March 1999 regarding Radio and
Telecommunication Terminal Equipment (R&TTE) and the mutual approval of
their conformity. Please observe the approved frequencies for individual
countries as listed in the appendix.
ELSA is not responsible for disturbances or interference caused by unautho-
rized modifications made to the devices. ELSA will not be held liable espe-
cially for the consequences of connecting external antennas or cables that
are not explicitly designed for use with ELSA LANCOM Wireless and Air-
Lancer devices.
See the appendix for more information on CE conformity.
1.1 The basic functions of a wireless network
This chapter introduces the basic functional principles of a wireless network.
The terms used will be explained and the structure and possible applications
of wireless networks introduced. Detailed information on this and other top-
ics can be found in the electronic documentation on the CD.
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Wireless network
adapters WLAN Wireless network adapters connect individual notebooks and PCs to a Local
Area Network (LAN). As the usual network cables have been replaced by a
radio link in this case, we also refer to this as a Wireless Local Area Network
(WLAN).
Access point Furthermore, the access point forms the bridge between LAN and WLAN.
The ELSA access point also can function as an Internet router or a wireless
bridge between two ethernet LANs. It has a slot for a wireless network
adapter (ELSA AirLancer MC-11) as well as a normal Ethernet connection on
the other side to exchange data between the two networks.
Radio cell The maximum area in which wireless network adapters in mobile stations
and the access point can reach each other and exchange data is known as a
radio cell.
All of the standard functions of a wired network are also available in a wire-
less network: Access to files, servers, printers etc. is possible as is the inte-
gration of the mobile stations into an internal company e-mail system.
1.2 Operating modes
The following operating modes are available using ELSA wireless network
adapters and access points:
Ad hoc network (peer-to-peer)
Infrastructure network
Wireless bridge
Wireless LAN + DSL gateway
Direct PC
connection Use the wireless network cards to link two or more computers directly. All
computers in a WLAN can then communicate with one another with no addi-
tional hardware.
Ad hoc network This application is generally called a peer-to-peer network. In the language
of wireless networking, it is known as an ad hoc network.
Ad hoc network
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Infrastructure
network All computers with wireless network cards are able to access a wired net-
work via an access point. The access point acts as the connection between
the LAN and the WLAN and it also forms the switching center for data traffic
within the WLANs.
A wireless network with a access point is also referred toas an infrastructure
network.
This network type is ideally suited as an addition to existing LANs. The infra-
structure network is the ideal solution for expansion of a LAN in areas where
wiring is not possible or not economical.
Roaming Multiple access points can be used if the range of a cell is not sufficient to
link all mobile stations. This makes it possible to switch from one wireless
cell to another without interrupting the connection to the network.
Infrastructure network
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Radio cells can also overlap to ensure good coverage. Different channels (up
to 13 channels are available) can be selected to prevent interference
between the cells.
1.3 What does the ELSA LANCOM Wireless L-11
offer?
The following is an outline of the principal features of the device giving you
a quick overview of its capabilities.
Easy installation
Connect the LANCOM Wireless to the power supply.
Establish a link to the LAN.
Connect to a DSL port.
Switch it on.
Go!
LAN connection
Access points for wireless networks by function in ELSA Ethernet environ-
ments. Use the 10Base-T connection and a hub or switch to connect the ELSA
LANCOM Wireless L-11 to a 10 Mbit LAN or to a DSL modem.
DSL connection
With special DSL firmware (on CD-ROM), you can connect your LANCOM to
a DSL modem (such as the T-DSL network offered by Deutsche Telekom).
Instead of connecting to the Ethernet, you can have quick access to the Inter-
net. This procedure can be switched in both directions by using the corre-
sponding firmware.
Configuration
Setting up and configuring the devices to your specific needs is made quick
and easy in Windows operating systems by the configuration tool supplied,
ELSA LANconfig.
The management tool WEBconfig is just as easy to use. It allows you to
access the configuration of the ELSA LANCOM access point or even load new
firmware using any HTML browser. Furthermore it is possible to access
device configuration via SNMP and TFTP.
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Access to the device is possible from a WLAN or LAN. SNMP is supported as
well as TFTP.
The integrated setup wizards from ELSA LANconfig and ELSA WEBconfig
help you get the unit operating in a few steps.
Software update
Your device has a flash ROM memory to ensure that its software remains
state of the art. This allows new firmware to be loaded onto the device with-
out the need to open it up.
The current version is always available to you on our online media and can be
loaded via the LAN or the WLAN.
FirmSafe
There is no risk involved with loading the new firmware: The FirmSafe func-
tion enables two firmware files to be managed on one device. If the new
firmware version does not function as desired after the upload you can simply
revert to the previous version.
If an error occurs during the upload (e.g. a transmission error) the functioning
previous version is automatically reactivated.
Wireless and secure with WEP
The WEP (Wired Equivalent Privacy) encryption method attaches a 40-bit or
128-bit key to the wireless data. The data encryption and authentication of
the stations makes it as good as impossible for the data in transit to be inter-
cepted. This ensures a considerably higher level of data security in wireless
network operation. Additionally, station filters based on MAC addresses
make it possible to allow or deny individual stations access to the access
point.
ELSA LANmonitor
Under Windows operating systems, this tool displays the status of the router
on the screen at all times. The most important information for every device
in the local network is displayed, such as:
Name of the remote site
Connection duration and transmission rates
Excerpts of the device statistics (e.g. PPP negotiation data)
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Additionally, the software allows you to log and save the messages on the
PC for further processing.
AirLancer Client Manager
The ELSA AirLancer Client Manager is included with the AirLancer cards and
provides software tools for configuring AirLancer adapters and monitoring
and diagnosing wireless networks. The wireless connection of WLAN clients
to the access point is continuously monitored, and the current status is also
displayed. You have a choice of the following:
Set the wireless parameters and user profiles
Monitor and analyze the wireless network (site survey)
Display the available access points
Carry out tests and diagnostics on the card
Monitor the signal strength
Assign the WEP encryption key
Refer to the online help file for detailed information on the ELSA AirLancer
Client Manager.
Status displays
LED indicators on the front of your access point allow you to monitor the Eth-
ernet connections and the current line connections, thus simplifying the pro-
cess of diagnosing any systems failures.
Statistics
The comprehensive statistics function lets you keep track of your ELSA LAN-
COM Wireless L-11. These statistics give you all the information you need
on the data packets transferred, for example, so that you can optimize the
configuration of your device.
DHCP
Your LANCOM provides the following DHCP modes:
DHCP server, to assign IP addresses
DHCP client, to receive addresses
DHCP relay agent, to forward DHCP requests
With its factory-preset configuration, the device operates using a sophisti-
cated automatic mode, which makes it extremely easy to get the LANCOM
running either on an existing network or a new network.
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DNS server
This function is only supported by the DSL firmware.
The router's DNS server functions allow you to set up links between IP
addresses and names of computers or networks. The correct route can be
directly assigned in the event of queries for known computer names.
The DNS server can also serve as an effective filter for the users in your local
network. Access to specified domains can be denied to individual computers
or complete networks.
Routing: Line connection and management
The router checks all data on the network to determine whether they have to
be sent to another network or computer. If data transfer is necessary, the
router establishes the connection itself and closes the connection once the
transfer is complete. Any partly used call charge units are used up fully if call
charge information is transmitted during the connection.
To reduce transfer costs, the router offers various filter options depending on
the mode of operation. These filters can be used to exclude data from being
tranmitted to all or part of the network. Data that belongs to specific services
(e.g. printing services) can also be excluded from transfer.
NetBIOS proxy
ELSA routers offer a special feature for the interconnection of Microsoft
peer-to-peer networks. With the integrated routing of IP NetBIOS packets,
the linking of Windows networks becomes child's play. The remote stations
relevant for the exchange of data are entered in a list to ensure that not every
NetBIOS packet results in the establishment of a connection.
As a NetBIOS proxy, the router answers the queries for known workstations
locally to prevent unnecessary connections from being established.
Accounting
Most data transfers through the ELSA router take place via dial-up connec-
tions, where the charges are calculated based on the online time, or via static
connections, where the charges are calculated based on the transferred data
volume. Only a small portion of users use true leased-line connections with
flat-rate charging.
For many users it is important to determine which of the immediate LAN com-
puters use the connection to the router and what charges they incur.
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With its accounting feature, ELSA LANCOM Wireless L-11 offers the ability
to breakdown online times and data transfer volumes for ISDN and DSL con-
nections based on the individual computers that use the connections. This
allows you to determine the incorrect configuration of the computer or router
quickly and allocate the resulting expenses to their appropriate causes.
Roaming
The roaming feature lets you construct bigger wireless networks using any
number of access points. When stations switch from one wireless cell to
another while connected, they are automatically logged off of the previous
access point and logged onto the next.
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2 Installation
This section will help you to connect as quickly as possible. First we will
describe the contents of the package and introduce the device itself. After
that we will explain how to connect the unit and put it to use quickly.
The following information is intended for experienced users familiar with
hardware and network configuration.
2.1 Package contents
Please ensure that the delivery is complete before beginning with the
installation. The package should include the following components:
ELSA LANCOM Wireless L-11
ELSA AirLancer wireless network adapter with integrated antenna
(already in the access point)
Power adapter
LAN connector cable
(also suitable when connecting to a DSL modem)
Documentation
CD containing ELSA LANconfig, other software and electronic
documentation
If anything should be missing, please contact your dealer.
2.2 System requirements
PCs that are to communicate with a LANCOM Wireless access point have to
meet the following minimum requirements:
The TCP/IP protocol must be installed.
A web browser must be installed (for HTML configuration).
An ELSA AirLancer or other ethernet card has to be installed.
Several programs and drivers, such as ELSA LANconfig require a Windows
operating system.
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2.3 Install TCP/IP on your workstation
To establish a connection to a ELSA LANCOM access point for the first time,
the TCP/IP protocol has to be set up. The following describes how to install
this protocol on various operating systems.
2.3.1 Windows 95 and Windows 98
Using Windows 95 and Windows 98 as examples, this section will show
what needs to be done, if it is not already done for you, to ensure smooth
communication between computers in a TCP/IP network with the router
connected to the workstations.
Installing TCP/IP
To install TCP/IP, click Start Settings Control Panel  Network
Add Protocol. Select the manufacturer 'Microsoft' and the 'TCP/
IP' network protocol.
Allocate IP addresses (using DHCP)
If you are going to use the router as a DHCP server, set the workstations
to obtain IP addresses automatically: Start Settings Control
panel Network  TCP/IP Properties IP address 
Automatically receive IP address. Also, delete any existing entries
for DNS servers and gateways (found under the 'Gateway' and 'DNS
Configuration' tabs). When the computer is restarted, it then searches for
a DHCP server on the network and lets it assign an IP address to it.
Setting fixed IP addresses (not using DHCP)
If you are not going to use a DHCP server on your network, assign the
workstations fixed IP addresses: Start Settings Control panel 
Network  TCP/IP Properties IP address Determine IP
address.
Assign unique IP addresses, for example taken from a reserved range of
addresses. For example, the workstations can be assigned addressed
from '10.1.1.2' to '10.1.1.253', the router can be given '10.1.1.1' and all
can have the subnet mask of '255.255.255.0'. To test whether or not a
specific IP address, such as '10.1.1.1', is free, enter ping 10.1.1.1
in a DOS session. If you do not receive a response, the address is most
likely free.
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Entering the gateway and DNS server (not necessary when using DHCP)
On the workstation computers, specify the address of the local network
router as the gateway and as the Domain Name Server (DNS server):
Start Settings  Control panel  Network  TCP/IP 
Properties Gateway and DNS configuration. Also enter a host
name on the DNS configuration page. In doing so, use the name of the
PC, which ideally matches the user's name, to maintain a certain amount
of consistency.
Checking the IP configuration
Under Windows 95 and Windows 98, you can view the current IP
configuration of your computer with by using Start Run winipcfg.
Among other information, this shows you which IP address was assigned
to the computer by the DHCP server and which addresses have been
specified for DNS servers and the gateway.
2.3.2 Windows NT 4.0
Using Windows NT 4.0 as an example, this section will show what needs to
be done, if it is not already done for you, to ensure smooth communication
between computers in a TCP/IP network with the router connected to the
workstations.
Installing TCP/IP
To install TCP/IP, click Start Settings Control Panel Network
Protocols Add. Select the 'TCP/IP protocol' network
protocol.
Allocate IP addresses (using DHCP)
If you are going to use the router as a DHCP server, set the workstations
to obtain IP addresses automatically. To do so, select Yes when
completing the network protocol installation.
Windows then copies the required files and, when finished, requests you
to reboot.
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Setting fixed IP addresses (not using DHCP)
If you are not going to use a DHCP server on your network, assign the
workstations fixed IP addresses: Start Settings Control Panel 
Network Protocols  Properties. This tab also lets you set the
standard gateway.
Assign unique IP addresses, for example taken from a reserved range of
addresses. For example, the workstations can be assigned addressed
from '10.1.1.2' to '10.1.1.253', the router can be given '10.1.1.1' and all
can have the subnet mask of '255.255.255.0'. To test whether or not a
specific IP address, such as '10.1.1.1', is free, enter ping 10.1.1.1
in a DOS session. If you do not receive a response, the address is most
likely free.
Entering the DNS server (not necessary when using DHCP)
On the workstation computers, specify the address of the local network
router as the Domain Name Server (DNS server) on the 'DNS' tab. Also
enter a host name on the DNS configuration page. In doing so, use the
name of the PC, which ideally matches the user's name, to maintain a
certain amount of consistency.
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Checking the IP configuration
Under Windows NT 4.0 you can query the current IP configuration of your
computer with Start Run ipconfig. This shows you which IP
address was assigned to the computer by the DHCP server and which
addresses have been specified for the gateway (not for the DNS server).
2.3.3 Windows 2000
With Windows 2000, helpful hardware setup wizards provide support when
you install the new hardware. If your network card is not detected during
system startup, launch the hardware wizard by selecting
Start Settings Control Panel Add/Remove Hardware.
햲Select to search for new hardware and then select the 'Add a new device'
from the list that follows and click Next >.
햳The search should detect the network card. Click again Next >. The
system then configures the new hardware and a LAN connection.
햴To verify the new LAN connection, open its window by selecting
Start Settings Network and Dialup Connections
From there, click the connection with the right mouse button and open
its properties.
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햵The dialog that appears contains a list box containing the installed
network components. TCP/IP should be listed in any case.
햶Select its entry and click the Properties... button.
This opens a dialog where you can define all of the properties for this network
protocol. The procedures for setting address, DHCP, gateway and DNS are
the same here as in Windows 98.
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