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Lancom L-320agn Wireless Manual

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LANCOM Systems GmbH
Adenauerstr. 20/B2
52146 Würselen
Germany
E-Mail: info@lancom.eu
Internet www.lancom.eu
LANCOM L-320agn Wireless
LANCOM L-321agn Wireless
LANCOM L-322agn dual Wireless
LANCOM L-320agn Wireless LANCOM L-321agn Wireless
LANCOM L-321agn dual Wireless
쮿
Handbuch
쮿
Manual
...connecting your business
110xxx_LC-L32x-MANUAL_cover.indd1 1110xxx_LC-L32x-MANUAL_cover.indd1 1 16.03.2010 05:53:4016.03.2010 05:53:40
LANCOM L-320agn Wireless
LANCOM L-321agn Wireless
LANCOM L-322agn dual Wireless
© 2011 LANCOM Systems GmbH, Wuerselen (Germany). All rights reserved.
While the information in this manual has been compiled with great care, it may not be deemed an assurance of product
characteristics. LANCOM Systems 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 LANCOM Systems. We reserve the right to make any alterations that arise as the
result of technical development.
Windows®, Windows Vista™, Windows NT® and Microsoft® are registered trademarks of Microsoft, Corp.
The LANCOM Systems logo, LCOS and the name LANCOM are registered trademarks of LANCOM Systems GmbH. All other
names or descriptions used may be trademarks or registered trademarks of their owners.
Subject to change without notice. No liability for technical errors or omissions.
Products from LANCOM Systems include software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http:/
/www.openssl.org/).
Products from LANCOM Systems include cryptographic software written by Eric Young (eay@cryptsoft.com
).
Products from LANCOM Systems include software developed by the NetBSD Foundation, Inc. and its contributors.
Products from LANCOM Systems contain the LZMA SDK developed by Igor Pavlov.
LANCOM Systems GmbH
Adenauerstr. 20/B2
52146 Wuerselen
Germany
www.lancom.eu
Wuerselen, Juli 2011
LANCOM L-32x Access Point series
Preface
3
EN
Preface
Thank you for your confidence in us!
LANCOM L-320agn Wireless, LANCOM L-321agn Wireless and LANCOM
L-322agn dual Wireless are professional access points that provide a maxi-
mum wireless LAN performance of up to 300 Mbps thanks to the support of
the IEEE 802.11n standard. The access points operate either in the 2.4 GHz or
in the 5 GHz frequency band. LANCOM L-322agn dual Wireless works with
two integrated radio modules (two IEEE 802.11agn), both of which can oper-
ate simultaneously in the 2.4- and/or 5 GHz frequency range. The 5 GHz band
is not used as much and, offering a larger number of channels, it provides bet-
ter opportunities to establish non-overlapping wireless cells. The L-32x Access
Point series models can operate in stand-alone mode, in managed mode or in
client mode. The access point can be used in managed mode with a LANCOM
WLAN Controller without any additional software upgrades.
The 802.11n standard includes many new mechanisms—such as the use of
MIMO, 40-MHz channels, packet aggregation and block acknowledge-
ment—in order to increase the bandwidth available for user applications sig-
nificantly. This allows a more than fivefold increase in speed over 802.11a/g
networks with physical data rates of up to 300 Mbps.
MIMO (multiple input multiple output) technology allows the L-32x Access
Point to transfer several data streams in parallel and thus significantly improve
data throughput. MIMO uses several transmit/receive units for both the trans-
mitter and the receiver. The separate data streams are identified by unique
characteristics that result from the different paths that the data take. By pro-
cessing multiple data streams MIMO achieves not just higher data throughput
but also better coverage (fewer "radio black spots") and better stability. These
are the most important arguments for 802.11n for commercial customers in
particular.
Model variants
This documentation is intended for L-32x Access Point users. The following
models are available:
The LANCOM L-320agn Wireless with two integrated antennas.
The LANCOM L-321agn Wireless with two external antennas.
The LANCOM L-322agn dual Wireless with two WLAN modules and four
external antennas.
LANCOM L-32x Access Point series
Preface
4
EN
Model
restrictions
Passages applying only to certain models are identified either in the text itself
or by a comment in the margin.
Otherwise the documentation refers to all models collectively as the L-32x
Access Point series.
Security settings
To maximize the security available from your product, we recommend that you
undertake all of the security settings (e.g. firewall, encryption, access protec-
tion) that were not already activated when you purchased the product. The
LANconfig Wizard 'Security Settings' will help you with this task. Further infor-
mation is also available in the chapter 'Security settings'.
We would additionally like to ask you to refer to our Internet site
www.lancom.eu
for the latest information about your product and technical
developments, and also to download our latest software versions.
Components of the documentation
The documentation of your device consists of the following parts:
Installation Guide
User manual
Menu Reference Guide
You are now reading the user manual. It contains all information you need to
put your device into operation. It also contains all of the important technical
specifications.
The Reference Manual is to be found as an Acrobat document (PDF file) at
www.lancom.eu/download
or on the CD supplied. It is designed as a supple-
ment to the user manual and goes into detail on topics that apply to a variety
of models. These include, for example:
The system design of the operating system LCOS
Configuration
Management
Diagnosis
Security
Routing and WAN functions
Firewall
Quality of Service (QoS)
Virtual Local Networks (VLAN)
LANCOM L-32x Access Point series
Preface
5
EN
Wireless networks (WLAN)
Backup solutions
Further server services (DHCP, DNS, charge management)
The Menu Reference Guide (also available at www.lancom.eu/download
or on
the CD supplied) describes all of the parameters in LCOS, the operating system
used by LANCOM products. This guide is an aid to users during the configu-
ration of devices by means of WEBconfig or the telnet console.
This documentation was created by …
... several members of our staff from a variety of departments in order to
ensure you the best possible support when using your
LANCOM
product.
Should you find any errors, or if you would like to suggest improvements, ple-
ase do not hesitate to send an e-mail directly to:
info@lancom.eu
Our online services www.lancom.eu are available to you around the
clock if you have any questions on the content in this manual, or if you
require any further support. The area 'Support' will help you with
many answers to frequently asked questions (FAQs). Furthermore, the
knowledgebase offers you a large reserve of information. The latest
drivers, firmware, utilities and documentation are constantly available
for download.
In addition, LANCOM Support is available. For telephone numbers
and contact addresses for LANCOM Support, please refer to the enc-
losed leaflet or the LANCOM Systems Web site.
Information symbols
Very important instructions. Failure to observe these may result in damage.
Important instruction that should be observed.
Additional information that may be helpful but is not essential.
LANCOM L-32x Access Point series
Contents
6
EN
Contents
1 Introduction 9
1.1 What is a wireless LAN? 9
1.1.1 Modes of operation of wireless LANs and access points
10
1.2 Wireless LANs in accordance with 802.11n 10
1.2.1 Advantages of 802.11n 10
1.2.2 Compatibility with other standards 11
1.2.3 The physical layer 11
1.2.4 The MAC layer 18
1.3 What can your LANCOM do? 19
2 Installation 23
2.1 Package contents 23
2.2 System requirements 23
2.2.1 Configuring the LANCOM devices 23
2.2.2 Operating access points in managed mode 24
2.3 Status displays and interfaces 24
2.4 Front side 24
2.5 Device connectors 27
2.6 Hardware installation 30
2.7 Software installation 32
2.7.1 Starting the software setup 33
2.7.2 Which software should I install? 34
3 Basic configuration 35
3.1 Details you will need 35
3.1.1 TCP/IP settings 36
3.1.2 Configuration protection 37
3.1.3 Settings for the wireless LAN 38
3.2 Instructions for LANconfig 38
3.3 Instructions for WEBconfig 39
3.4 TCP/IP settings for PC workstations 43
LANCOM L-32x Access Point series
Contents
7
EN
4 Security settings 45
4.1 Security in the wireless LAN 45
4.1.1 Encrypted data transfer 45
4.1.2 802.1x / EAP 46
4.1.3 LANCOM Enhanced Passphrase Security 46
4.1.4 Access control by MAC address 47
4.1.5 IPSec over WLAN 47
4.2 Tips for the proper treatment of keys and passphrases 48
4.3 Security settings Wizard 48
4.3.1 LANconfig Wizard 49
4.3.2 WEBconfig Wizard 50
4.4 The security checklist 50
5 Advanced wireless LAN configuration 55
5.1 WLAN configuration with the wizards in LANconfig 55
5.2 Special wireless LAN parameters for 802.11n 57
5.2.1 Compatibility 57
5.2.2 Performance settings for the wireless LAN module 57
5.2.3 Performance settings for wireless LAN networks 58
5.2.4 Configuring 802.11n parameters 60
5.3 Point-to-point connections 61
5.3.1 Geometric dimensioning of outdoor wireless network
links 62
5.3.2 Antenna alignment for P2P operations 66
5.3.3 Measuring wireless bridges 68
5.3.4 Activating the point-to-point operation mode 68
5.3.5 Configuration of P2P connections 69
5.3.6 Access points in relay mode 72
5.3.7 Security for point-to-point connections 72
5.4 Client mode 74
5.4.1 Client settings 75
5.4.2 Set the SSID of the available networks 76
5.4.3 Encryption settings 76
5.4.4 Roaming 77
LANCOM L-32x Access Point series
Contents
8
EN
6 Setting up Internet access 79
6.1 The Internet Connection Wizard 80
6.1.1 Instructions for LANconfig 80
6.1.2 Instructions for WEBconfig 81
7 Options and accessories 82
7.1 Optional AirLancer Extender antennas 83
7.1.1 Antenna diversity 83
7.1.2 Polarization diversity 84
7.1.3 MIMO 84
7.1.4 Installing the AirLancer Extender antennas 84
7.2 LANCOM Public Spot Option 86
8 Advice & assistance 88
8.1 No WAN connection can be established 88
8.2 Slow DSL transmission 88
8.3 Unwanted connections under Windows XP 89
9 Appendix 90
9.1 Performance and characteristics 90
9.2 Connector wiring 92
9.2.1 Ethernet interface 10/100Base-TX 92
9.2.2 Ethernet interface 10/100/1000Base-TX, DSL interface92
9.2.3 Configuration interface (outband) 93
9.3 CE-declarations of conformity 93
10 Index 94
LANCOM L-32x Access Point series
Chapter 1: Introduction
9
EN
1Introduction
1.1 What is a wireless LAN?
The following sections describe the functionality of wireless networks
in general. You can see from the table 'What your LANCOM can do'
further below which functions your device supports. Please refer to
the reference manual for further information on this topic.
A wireless LAN connects individual end-user devices (PCs and mobile compu-
ters) to form a local network (also called – Local Area Network). In contrast
to a traditional LAN, communication takes place over a wireless connection
and not over network cables. For this reason it is called a Wireless Local Area
Network (WLAN).
A wireless LAN provides the same functionality as a cable-based network:
Access to files, servers, printers etc. as well as the integration of individual
work stations into a corporate mail system or access to the Internet.
There are obvious advantages to wireless LANs: Notebooks and PCs can be
installed where they are needed—problems with missing connections or
structural changes are a thing of the past with wireless networks.
Apart from that, wireless LANs can also be used for connections over longer
distances. Expensive leased lines and the associated construction measures
can be saved.
LANCOM Wireless Routers and LANCOM Access Points can be opera-
ted either as self-sufficient Access Points with their own configuration
(WLAN modules in "Access Point mode“) or as components in a WLAN
infrastructure, which is controlled from a central WLAN-Controller
("managed mode").
Split management can be used to separate the WLAN configuration
from the rest of the router configuration. This allows router settings
and VPN settings to be adjusted locally, for example in a branch office
or home office installation, and the WLAN configuration is regulated
by a LANCOM WLAN Controller at the main office.
Please observe the corresponding notices to this in this documenta-
tion or in the LCOS reference manual.
LANCOM L-32x Access Point series
Chapter 5: Advanced wireless LAN configuration
57
EN
Point-to-point settings
The configuration of P2P connections involves setting not only the operating
mode but also the station name that the Access Point can connect to. Also,
the role as "Master" or "Slave" is set here.
Along with the settings for the Access Point itself, also to be defined is the
remote site that the Access Point can contact via the P2P connection.
For further information please refer to section → Point-to-point connections.
5.2 Special wireless LAN parameters for 802.11n
You can use special parameters to adjust the operation of the 802.11n Access
Point to match the application in question. Some of the parameters are con-
cerned with compatibility to the conventional wireless LAN standard, others
with transmission performance.
5.2.1 Compatibility
In principle, 802.11n is backwardly compatible to the previous IEEE 802.11a/
b/g wireless LAN standards even though not all 802.11n functions are sup-
ported in this mode. Compatibility can be allowed or restricted by selecting
the operating mode in the relevant frequency band (2.4 or 5 GHz). In this way
you can allow the corresponding wireless LAN clients to register with the
Access Point.
In the 2.4 GHz band you can allow operation in accordance with 802.1b/
g/n either exclusively or in various mixed modes. When 802.11b is sup-
ported you can also select whether only 11Mbps mode or the older
2 Mbps are to be supported.
In the 5 GHz band you can choose to allow either greenfield mode
(802.11n only) or mixed operation with 802.11a.
Compatibility is always achieved at the expense of performance. It is
therefore recommended to allow only those modes of operation that
are absolutely necessary for the wireless LAN clients in use.
5.2.2 Performance settings for the wireless LAN module
802.11n provides a number of functions intended to improve wireless LAN
performance, some of which apply to the entire wireless LAN module.
… 58 …


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