Siemens Enterprise Communications GmbH & Co. KG
a Trademark Licensee of Siemens AG
Reference No.: 9034530-04
The information provided in this document contains
merely general descriptions or characteristics of
performance which in case of actual use do not always
apply as described or which may change as a result of fur ther development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. Availability and
technical specifications are subject to change without notice.
OpenScape, OpenStage and HiPath are registered trademarks of Siemens Enterprise
Communications GmbH & Co. KG.
All other company, brand, product and service names are
trademarks or registered trademarks of their respective
holders.
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ContentsNur für den internen Gebrauch
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10HiPath Wireless Controller, Access Points and Convergence Software V7.31, User Guide
1 About this Guide
This guide describes how to install, configure, and manage the HiPath Wireless
Controller, Access Point s and Conver gence Software system. This guide is also
available as an online help system.
To access the online help system:
1. In the HiPath Wireless Assistant Main Menu bar, click Help. The About
HiPath Wireless Assistant screen is displayed.
2. In the left pane, click Controller Documentation. The online help system is
launched.
1.1 Who should use this guide
hwc_pref.fm
About this Guide
Who should use this guide
This guide is a reference for system administrators who install and manage the
HiPath Wireless Controller, Access Points and Convergence Software system.
Any administrator performing tasks described in this guide must have an account
with administrative privileges.
1.2 What is in this guide
This guide contains the following:
•Chapter 1, “About this Guide”, describes the target audience and content of
•Chapter 2, “Overview of the HiPath Wireless Controller, Access Points and
•Chapter 3, “Configuring the HiPath Wireless Controller”, describes how to
•Chapter 4, “Configuring the Wireless AP”, describes how to install the
the guide, the formatting conventions used in it, and how to provide feedback
on the guide.
Convergence Software solution”, provides an overview of the product, its
features and functionality.
perform the installation, first time setup and configuration of the HiPath
Wireless Controller, as well as configuring the data ports and de fining routing.
Wireless AP, how it discovers and registers with the HiPath Wireless
Controller, and how to view and modify radio configuration.
•Chapter 5, “Virtual Network Services concepts”, provides an overview of
Virtual Network Services (VNS), the mechanism by which the HiPath
Wireless Controller, Access Points and Convergence Software controls and
manages network access.
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About this Guide
What is in this guide
•Chapter 6, “Configuring a VNS”, provides detailed instructions in how to
configure a VNS, either using the Wizards or by manually creating the
component parts of a VNS.
•Chapter 7, “Availability and session availability”, describes how to set up the
features that maintain service availability in the event of a HiPath Wireless
Controller failover.
•Chapter 8, “Configuring Mobility”, describes how to set up the mobility domain
that provides mobility for a wireless device user when the user roams from
one Wireless AP to another in the mobility domain.
•Chapter 9, “Working with third-party APs”, describes how to use the
Controller , Access Points and Convergence Software features with third-pa rty
wireless access points.
•Chapter 10, “Working with the Mitigator”, describes the security tool that
scans for, detects, and reports on rogue APs.
•Chapter 11, “Working with reports and displays”, describes the various
reports and displays available in the HiPath Wireless Controller, Access
Points and Convergence Software system.
•Chapter 12, “Performing system administration”, describes system
administration activities, such as performing Wireless AP client management,
defining management users, configu rin g the ne two r k time , an d co nfig u ring
Web session timeouts.
•Chapter 13, “Glossary”, contains a list of terms and definitions for the HiPath
Wireless Controller and the Wireless AP as well as standard industry terms
used in this guide.
•Appendix A, describes the physical description and LED states of the HiPath
Wireless Controller.
•Appendix B, provides the regulatory information for the HiPath Wireless
Controller and the HiPath Wireless Access Points (APs).
•Appendix C, describes how to configure the WL2 phone.
•Appendix D, describes how to configure NetLink Wireless Telephones and
WLAN infrastructure products.
•Appendix E, provides the default GuestPortal ticket page source code.
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1.3 Formatting conventions
The HiPath Wireless Controller, Access Points and Convergence Software
documentation uses the following formatting conventions to make it easier to find
information and follow procedures:
•Bold text is used to identify components of the management inte rface, such
as menu items and section of pages, as well as the names of buttons and text
boxes.
For example: Click Logout.
•Monospace font is used in code examples and to indicate text that you type.
For example: T ype https://<hwc-address>[:mgmt-port>]
•The following notes are used to draw your attention to additional information:
hwc_pref.fm
About this Guide
Formatting conventions
Note: Notes identify useful information, such as reminders, tips, or other ways to
perform a task.
Caution: Cautionary notes identify essential information, which if ignored can
adversely affect the operation of your equipment or software.
Warning: Warning notes identify essential information, which if ignored can lead
to personal injury or harm.
1.4 Additional documentation
For additional HiPath Wireless documentation, see the HiPath Wireless
documentation at
http://www.enterasys.com/support/manuals
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About this Guide
Getting Help
1.5 Getting Help
For additional support related to the product or this docu ment, contact Enterasys
Networks using one of the following methods:
World Wide Webwww.enterasys.com/support
Phone1-800-872-8440 (toll-free in U.S. and Canada)
or 1-978-684-1000
To find the Enterasys Networks Support toll-free number in your
country: www.enterasys.com/support
Internet mailsupport@enterasys.com
To expedite your message, type HiPath Wireless in the subject line
To send comments concerning this document to the Technical Publications Department:
techpubs@enterasys.com
Please include the document part number in your email message.
Before contacting Enterasys Networks for technical support, have the following
information ready:
•Your Enterasys Networks service contract number
•A description of the failure
•A description of any action(s) already taken to resolve the problem (for
•The serial and revision numbers of all involved Enterasys Networks products
•A description of your network environment (such as layout, cable type, other
•Network load and frame size at the time of trouble (if known)
•The device history (for example, if you have returned the device before, or if
•Any previous Return Material Authorization (RMA) numbers
1.6 Safety Information
Dangers
example, changing mode switches or rebooting the unit)
in the network
relevant environmental information)
this a recurring problem)
•Replace the power cable immediately if it shows any sign of damage.
•Replace any damaged safety equipment (covers, labels and protective
cables) immediately.
•Use only original accessories or components approved for the system.
Failure to observe these instructions may damage the equipment or even
violate safety and EMC regulations.
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About this Guide
Safety Information
•Only authorized Siemens service personnel are permitted to service the
system.
Warnings
•This device must not be connected to a LAN segment with outdoor wiring.
•Ensure that all cables are run correctly to avoid strain.
•Replace the power supply adapter immediately if it shows any sign of
damage.
•Disconnect all power before working near power supplies unless otherwise
instructed by a maintenance procedure.
•Exercise caution when servicing hot swappable HiPath Wireless Controller
components: power supplies or fans. Rotating fans can cause serious
personal injury.
•This unit may have more than one power supply cord. To avoid electrical
shock, disconnect all power supply cords before servicing. In the case of unit
failure of one of the power supply modules, the mo du le ca n be rep lac ed
without interruption of power to the HiPath Wireless Controller. However , this
procedure must be carried out with caution. We ar gloves to avoid contact with
the module, which will be extremely hot.
•There is a risk of explosion if a lithium battery is not correctly replaced. The
lithium battery must be replaced only by an identical battery or one
recommended by the manufacturer.
•Always dispose of lithium batteries properly.
•Do not attempt to lift objects that you think are too heavy for you.
Cautions
•Check the nominal voltage set for the equipment (o per ating in stru ctions a nd
type plate). High voltages capable of causing shock are used in this
equipment. Exercise caution when measuring high voltages and when
servicing cards, panels, and boards while the system is powered on.
•Only use tools and equipment that are in perfect condition. Do not use
equipment with visible damage.
•To protect electrostatic sensitive devices (ESD), wear a wristband before
carrying out any work on hardware.
•Lay cables so as to prevent any risk of them being damaged or causing
accidents, such as tripping.
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About this Guide
Sicherheitshinweise
1.7 Sicherheitshinweise
Gefahrenhinweise
•Sollte das Netzkabel Anzeichen von Beschädigungen aufweisen, tausch en
•Tauschen Sie beschädigte Sicherheitsausrüstungen (Abdeckungen,
•Verwenden Sie ausschließlich Originalzubehör oder systemspezifisch
•Das System darf nur von autorisiertem Siemens-Servicepersonal gewartet
Warnhinweise
Sie es sofort aus.
Typenschilder und Schutzkabel) sofort aus.
zugelassene Komponenten. Die Nichtbeachtung dieser Hinweise kann zur
Beschädigung der Ausrüstung oder zur Verletzung von Sicherheits- und
EMV-Vorschriften führen.
werden.
•Dieses Gerät darf nicht über Außenverdrahtung an ein LAN-Segment
angeschlossen werden.
•Stellen Sie sicher, dass alle Kabel korrekt geführt werden, um Zugbelastung
zu vermeiden.
•Sollte das Netzteil Anzeichen von Beschädigung aufweisen, tauschen Sie es
sofort aus.
•Trennen Sie alle Stromverbindungen, bevor Sie Arbeiten im Bereich der
Stromver sorgung vornehmen, sofern dies nicht für eine Wartungsprozedur
anders verlangt wird.
•Gehen Sie vorsichtig vor, wenn Sie an Hotswap-fähigen HiPath Wireless
Controller-Komponenten (Stromversorgungen oder Lüftern) Servicearbeiten
durchführen. Rotierende Lüfter können ernsthafte Verletzungen verursachen.
•Dieses Gerät ist möglicherweise über mehr als ein Netzkab el angeschlossen.
Um die Gefahr eines elektrischen Schlages zu vermeiden, sollten Sie vor
Durchführung von Servicearbeiten alle Netzkabel trennen. Falls eines der
Stromversorgungsmodule ausfällt, kann es ausgetauscht werden, ohne die
Stromversorgung zum HiPath Wireless Controller zu unterbrechen. Bei
dieser Prozedur ist jedoch mit Vorsicht vorzugehen. Das Modul kann extrem
heiß sein. Tragen Sie Handschuhe, um Verbrennungen zu vermeiden.
•Bei unsachgemäßem Austausch der Lithium-Batte rie be ste ht
Explosionsgefahr. Die Lithium-Batterie darf nur durch identische oder vom
Händler empfohlene Typen ersetzt werden.
•Achten Sie bei Lithium-Batterien auf die ordnungsgemäße Entsorgung.
•Versuchen Sie niemals, ohne Hilfe schwere Gegenstände zu heben.
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About this Guide
Consignes de sécurité
Vorsichtshinweise
•Überprüfen Sie die für die Ausrüstung festgelegte Nennspannung
(Bedienungsanleitung und Typenschild). Diese Ausrüstung arbeitet mit
Hochspannung, die mit der Gefahr eines elektrischen Schlages verbunden
ist. Gehen Sie mit großer V orsicht vor , wenn Sie bei eingeschaltetem System
Hochspannungen messen oder Karten, Schaltt afeln und Baugruppen warten.
•Verwenden Sie nur Werkzeuge und Ausrüstung in einwandfreiem Zustand.
Verwenden Sie keine Ausrüstung mit sichtbaren Beschädigungen.
•Tragen Sie bei Arbeiten an Hardwarekomponenten ein Armband, um
elektrostatisch gefährdete Bauelemente (EGB) vor Beschädigungen zu
schützen.
•Verlegen Sie Leitungen so, dass sie keine Unfallquelle ( S tolpergefahr) bilden
und nicht beschädigt werden.
1.8 Consignes de sécurité
Dangers
•Si le cordon de raccordement au secteur est endommagé, remplacez-le
immédiatement.
•Remplacez sans délai les équipements de sécurité endommagés (caches,
étiquettes et conducteurs de protection).
•Utilisez uniquement les accessoires d'origine ou les modules agréés
spécifiques au système. Dans le cas contraire, vous risquez d'endommager
l'installation ou d'enfreindre les consignes en matière de sécurité et de
compatibilité électromagnétique.
•Seul le personnel de service Siemens est autorisé à maintenir/réparer le
système.
Avertissements
•Cet appareil ne doit pas être connecté à un segment de LAN à l'aide d'un
câblage extérieur.
•Vérifiez que tous les câbles fonctionnent correctement pour éviter une
contrainte excessive.
•Si l'adaptateur d'alimentation présente des dommages , rem place z- le
immédiatement.
•Coupez toujours l'alimentation avant de travailler sur les alimentations
électriques, sauf si la procédure de maintenance mentionne le contraire.
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About this Guide
Consignes de sécurité
•Prenez toutes les précautions nécessaires lors de l'entretien/rép arations des
modules du HiPath Wireless Controller pouvant être branchés à chaud :
alimentations électriques ou ventilateurs.Les ventilateurs rotatifs peuvent
provoquer des blessures graves.
•Cette unité peut avoir plusieurs cordons d'alimenta tion.Pour éviter tout cho c
électrique, débranchez tous les cordons d'alimentation avant de procéder à
la maintenance.En cas de panne d'un des modules d'aliment ation, le module
défectueux peut être changé sans éteindre le HiPath Wireless Controller.
Toutefois, ce remplacement doit être effectué avec précautions. Portez des
gants pour éviter de toucher le module qui peut être très chaud.
•Le remplacement non conforme de la batterie au lithium peut provoquer une
explosion. Remplacez la batterie au lithium par un modèle identique ou par
un modèle recommandé par le revendeur.
•Sa mise au rebut doit être conforme aux prescriptions en vigueur.
•N'essayez jamais de soulever des objets qui risquent d' être tr op lou rds p our
vous.
Précautions
•Contrôlez la tension nominale paramétrée sur l'installation (voir le mode
d'emploi et la plaque signalétique). Des tensions élevées pouvant entraîner
des chocs électriques sont utilisées dans cet équipement. Lorsque le
système est sous tension, prenez toutes les précautions nécessaires lors de
la mesure des hautes tensions et de l'entretien/réparation des cartes, des
panneaux, des plaques.
•N'utilisez que des appareils et des outils en parfait état. Ne mettez jamais en
service des appareils présentant des dommages visibles.
•Pour protéger les dispositifs sensibles à l'électricité statique, portez un
bracelet antistatique lors du travail sur le matériel.
•Acheminez les câbles de manière à ce qu'ils ne puissent pas être
endommagés et qu'ils ne constituent pas une source de danger (par
exemple, en provoquant la chute de personnes).
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Overview of the HiPath Wireless Controller, Access Points and Convergence Software solution
2 Overview of the HiPath Wireless Controller, Access
Points and Convergence Software solution
This chapter describes HiPath Wireless Controller, Access Points and
Convergence Software concepts, including:
•Conventional wireless LANs
•Elements of the HiPath Wireless Controller , Access Point s and Convergence
Software solution
•HiPath Wireless Controller, Access Points and Convergence Sof tware and
your network
The next generation of Siemens wireless networking devices provides a truly
scalable WLAN solution. Siemens Wireless APs are fit access points controlled
through a sophisticated network device, the HiPath Wireless Controller. This
solution provides the security and manageability required by enterprises and
service providers.
The HiPath Wireless Controller, Access Points and Convergence Software
system is a highly scalable Wireless Local Area Network (WLAN) solution
developed by Siemens. Based on a third generation WLAN topology, the
Controller, Access Points and Convergence Software system makes wireless
practical for service providers as well as medium and large-scale enterprises.
The HiPath Wireless Controller, Access Points and Convergence Software
system provides a secure, highly scalable, cost-effective solution based on the
IEEE 802.1 1 standard. The system is intended for enterprise networks operating
on multiple floors in more than one building, and is ideal for public environments,
such as airports and convention centers that require multiple access points.
This chapter provides an overview of the fundamental principles of the HiPath
Wireless Controller, Access Points and Convergence Software system.
The HiPath Wireless system
The HiPath Wireless Controller is a network device designed to integrate with an
existing wired Local Area Network (LAN). The rack-mountable HiPath Wireless
Controller provides centralized management, network access, and routing to
wireless devices that use Wireless APs to access the network. It can also be
configured to handle data traffic from third-party access points.
The HiPath Wireless Controller provides the following functionality:
•Controls and configures Wireless APs, providing centralized management
•Authenticates wireless devices that contact a Wireless AP
•Assigns each wireless device to a VNS when it connects
•Routes traffic from wireless devices, using VNS, to the wired network
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Overview of the HiPath Wireless Controller, Access Points and Convergence Software solution
Conventional wireless LANs
•Applies filtering policies to the wireless device session
•Provides session logging and accounting capability
2.1 Conventional wireless LANs
Wireless communication between multiple computers requires that each
computer is equipped with a receiver/transmitter—a WLAN Network Interface
Card (NIC)—capable of exchanging digital information over a common radio
frequency. This is called an ad hoc network configuration. An ad hoc network
configuration allows wireless devices to communicate together. This setup is
defined as an independent basic service set (IBSS).
An alternative to the ad hoc configuration is the use of an access point. This may
be a dedicated hardware bridge or a computer running special software.
Computers and other wireless devices communicate with e ach other through this
access point. The 802.11 standard defines access point communications as
devices that allow wireless devices to communicate with a distribution system.
This setup is defined as a basic service set (BSS) or infrastructure network.
T o allow the wireless devices to communicate with computers on a wired network,
the access points must be connected to the wired network providing access to the
networked computers. This topology is called bridging. With bridging, security
and management scalability is often a concern.
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Overview of the HiPath Wireless Controller, Access Points and Convergence Software solution
Conventional wireless LANs
RADIUS
Authentication
Server
Wireless AP
Wireless
Devices
Ethernet
DCHP Server
Router/Switch
Wireless AP
Ethernet
Wireless
Devices
Figure 1Standard wireless network solution example
The wireless devices and the wired networks communicate with each other using
standard networking protocols and addressing schemes. Most commonly,
Internet Protocol (IP) addressing is used.
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Overview of the HiPath Wireless Controller, Access Points and Convergence Software solution
Elements of the HiPath Wireless Controller, Access Points and Convergence Software solution
2.2 Elements of the HiPath Wireless Controller, Access Points and
Convergence Software solution
The HiPath Wireless Controller, Access Points and Convergence Software
solution consists of two devices:
•HiPath Wireless Controller
•Wireless APs
This architecture allows a single HiPath Wireless Controller to control many
Wireless APs, making the administration and management of large networks
much easier.
There can be several HiPath Wireless Controllers in the network, each with a set
of registered Wireless APs. The HiPath Wireless Controllers can also act as
backups to each other, providing stable network availability.
In addition to the HiPath Wireless Controllers and Wireless APs, the solution
requires three other components, all of which are standard for enterprise and
service provider networks:
•RADIUS Server (Remote Access Dial-In User Service) or other
authentication server
•DHCP Server (Dynamic Host Configuration Protocol). If you do not have a
DHCP Server on your network, you can enable the local DHCP Server on the
HiPath Wireless Controller. The local DHCP Server is useful as a general
purpose DHCP Server for small subnets. For more information, see Step 10
of Section 3.4.3, “Setting up the data ports”, on page 55.
•SLP (Service Location Protocol)
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Overview of the HiPath Wireless Controller, Access Points and Convergence Software solution
Elements of the HiPath Wireless Controller, Access Points an d Convergence Software solution
As illustrated in Figure 2, the HiPath Wireless Controller appears to the existing
network as if it were an access point, but in fact one HiPath Wireless Controller
controls many Wireless APs. The HiPath Wireless Controller has built-in
capabilities to recognize and manage the Wireless APs. The HiPath Wireless
Controller:
•Activates the Wireless APs
•Enables Wireless APs to receive wireless traffic from wireless devices
•Processes the data traffic from the Wireless APs
•Forwards or routes the processed data traffic out to the network
•Authenticates requests and applies access policies
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Overview of the HiPath Wireless Controller, Access Points and Convergence Software solution
Elements of the HiPath Wireless Controller, Access Points and Convergence Software solution
Simplifying the Wireless APs makes them cost-effective, easy to manage, and
easy to deploy. Putting control on an intelligent centralized HiPath Wireless
Controller enables:
•Centralized configuration, management, reporting, and maintenance
•High security
•Flexibility to suit enterprise
•Scalable and resilient deployments with a few HiPath Wireless Controllers
controlling hundreds of Wireless APs
The HiPath Wireless Controller, Access Points and Convergence Software
system:
•Scales up to Enterprise capacity – HiPath Wireless Controllers are
scalable:
•C5110 – Up to 525 APs
•C4110 – Up to 250 APs
•C2400 – Up to 200 APs
•C20 – Up to 32 APs
•C20N – Up to 32 APs
•CRBT8210 – Up to 72 APs
•CRBT8110 – Up to 24 APs
In turn, each Wireless AP can handle up to 254 wireless devices, with each
radio supporting a maximum of 127. With additional HiPath Wireless
Controllers, the number of wireless devices the solution can support can
reach into the thousands.
•Integrates with existing network – A HiPath Wireless Controller can be
added to an existing enterprise network as a new network device, greatly
enhancing its capability without interfering with existing functionality.
Integration of the HiPath Wireless Controllers and Wireless APs does not
require any re-configuration of the existing infrastructure (for example,
VLANs).
•Integrates with the Enterasys NetSight Suite of products. For more
information, see Section 2.2.1, “Enterasys NetSight Suite integration”, on
page 26.
Plug-in applications include:
•Automated Security Manager
•Inventory Manager
•NAC Manager
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Elements of the HiPath Wireless Controller, Access Points an d Convergence Software solution
•Policy Control Console
•Policy Manager
•Offers centralized management and control – An administrator accesses
the HiPath Wireless Controller in its centralized location to monitor and
administer the entire wireless network. From the HiPath Wireless Controller
the administrator can recognize, configure, and manage the Wireless APs
and distribute new software releases.
•Provides easy deployment of Wireless APs – The initial configuration of
the Wireless APs on the centralized HiPath Wireless Controlle r can be do ne
with an automatic “discovery” technique. For more information, see Section
4.2, “Discovery and registration overview”, on page 107.
•Provides security via user authentication – Uses existing authentication
(AAA) servers to authenticate and authorize users.
•Provides security via filters and privileges – Uses virtual networking
techniques to create separate virtual networks with defined authentication
and billing services, access policies, and privileges.
•Supports seamless mo bility and roaming – Supports sea mless roaming of
a wireless device from one Wireless AP to another on the same HiPath
Wireless Controller or on a different HiPath Wireless Controller.
•Integrates third-party access points – Uses a combination of network
routing and authentication techniques.
•Prevents rogue devices – Unauthorized access points are detected and
identified as harmless or dangerous rogue APs.
•Provides accounting services – Logs wireless user sessions, user group
activity, and other activity reporting, enabling the generation of consolidated
billing records.
•Offers troubleshooting capability – Logs system and session activity and
provides reports to aid in troubleshooting analysis.
•Offers dynamic RF management – Automatically selects channels and
adjusts Radio Frequency (RF) signal propagation and power levels without
user intervention.
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Elements of the HiPath Wireless Controller, Access Points and Convergence Software solution
2.2.1 Enterasys NetSight Suite integration
The HiPath Wireless Controller, Access Points and Convergence Software
solution now integrates with the Enterasys NetSight Suite of products. The
Enterasys NetSight Suite of products provides a collection of tools to help you
manage networks. Its client/server architecture lets you manage your network
from a single workstation or , for networks of greater complexity, from one or more
client workstations. It is designed to facilitate specific network management tasks
while sharing data and providing common controls and a consistent user
interface. For more information, see http://www.enterasys.com/products/visibility-
control/index.aspx
The NetSight Suite is a family of products comprised of NetSight Console and a
suite of plug-in applications, including:
•Automated Security Manager – Automated Security Manager is a unique
threat response solution that translates security intelligence into security
enforcement. It provides sophisticated identification and management of
threats and vulnerabilities. For information on how the HiPath Wireless
Controller , Access Points and Convergence Sof tware solution integrates with
the Automated Security Manager application, see the HiPath Wireless Controller, Access Points and Convergence Software Maintenance Guide.
•Inventory Manager – Inventory Manager is a tool for ef ficiently documenting
and updating the details of the ever-changing network. For information on
how the HiPath Wireless Controller, Access Points and Convergence
Software solution integrates with the Automated Security Manager
application, see the HiPath Wireless Controller, Access Points and Convergence Software Maintenance Guide.
•NAC Manager – NAC Manager is a leading-edge NAC solution to ensure
only the right users have access to the right information from the right place
at the right time. The Enterasys NAC solution performs multi-user, multimethod authentication, vulnerability assessment and assisted remediation.
For information on how the HiPath Wireless Controller, Access Points and
Convergence Software solution integrates with the Enterasys NAC solution,
see Section 5.3, “NAC integration with HiPath WLAN”, on page 253.
•Policy Manager
Policy Manager recognizes the HiPath Wireless Controller suite as policy
capable devices that accept partial configuration from Policy Manager.
Currently this integration is partial in the sense that NetSight is unable to
create WLAN services directly; The WLAN services need to be directly
provisioned on the controller and are represented to Policy Manager as
logical ports. The HiPath Wireless Controller allows Policy Manager to:
•Attach T opo logies (assign VLAN to port) to the HiPath Wireless Controller
physical ports (Console).
•Attach policy to the logical ports (WLAN Service/SSID),
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HiPath Wireless Controller, Access Points and Convergence Software and your network
•Assign a Default Role/Policy to a WLAN Service, thus creating the VNS.
•Perform authentication operations which can then reference defined
policies for station-specific policy enforcement.
This can be seen as a three step process:
1. Deploy the controller and perform local configuration
–The HiPath Wireless Controller ships with a default SSID, attached by
default to all AP radios, when enabled.
–Use the basic installation wizard to complete the HiPath Wirele ss
Controller configuration.
2. Use Policy Manager to:
–Push the VLAN list to the HiPath Wireless Controller (Topologies)
–Attach VLANs to HiPath Wireless Controller physical ports (Console
- Complete Topology definition)
–Push RADIUS server configuration to the HiPath Wireless Controller
–Push policy definitions to the HiPath Wireless Controller
–Attach the default policy to create a VNS
3. Fine tune controller settings. For example, configuring filtering at APs and
HiPath Wireless Controller for a bridged at controller or routed topologies
and associated VNSs.
Note: Complete information about in tegration with Policy Manager is outside
the scope of this document.
2.3 HiPath Wireless Controller, Access Points and Convergence Software
and your network
This section is a summary of the components of the HiPath Wireless Controller,
Access Points and Convergence Software solution on your enterprise network.
The following are described in detail in this guide, unless otherwise stated:
•HiPath Wireless Controller – A rack-mountable network device that
provides centralized control over all access points and manages the network
assignment of wireless device clients associating through access points.
•Wireless AP – A wireless LAN fit access point that communicates with a
HiPath Wireless Controller. A Wireless AP can also be configured as a
sensor, which monitors and interdicts intrusions by rogue APs and rogue
clients.
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HiPath Wireless Controller, Access Points and Convergence Software and your network
•HiPath Wireless Manager – An optional component of the solution, the
HiPath Wireless Manager monitors the performance and health of the
wireless network. The HiPath Wireless Manager is particularly valuable for
installations that incorporate more than one HiPath Wireless Controller. For
more information, see the HiPath Wireless Manager User Guide.
•RADIUS Server (Remote Access Dial-In User Service) (RFC2865), or other
authentication server – An authentication server that assigns and manages
ID and Password protection throughout the network. Used for authentication
of the wireless users in either 802.1x or Captive Portal security modes. The
RADIUS Server system can be set up for certain st andard attributes, such as
filter ID, and for the Vendor Specific Attributes (VSAs). In addition, Radius
Disconnect (RFC3576) which permits dynamic adjustment of user policy
(user disconnect) is supported.
•DHCP Server (Dynamic Host Configuration Protocol) (RFC2131) – A server
that assigns dynamically IP addresses, gateways, and subnet masks. IP
address assignment for clients can be done by the DHCP server internal to
the HiPath Wireless Controller, or by existing servers using DHCP relay . It is
also used by the Wireless APs to discover the location of the HiPath Wireless
Controller during the initial registration process using Options 43, 60, and
Option 78. Options 43 and 60 specify the vendor class identifier (VCI) and
vendor specific information. Option 78 specifies the location of one or more
SLP Directory Agents. For SLP, DHCP should have Opti on 78 ena ble d.
•Service Location Protocol (SLP) (SLP RFC2608) – Client applications are
User Agents and services that are advertised by a Service Agent. In larger
installations, a Directory Agent collects information fro m Service Agent s and
creates a central repository. The Siemens solution relies on registering
“siemens” as an SLP Service Agent.
•Domain Name Server (DNS) – A server used as an alternate mechanism (if
present on the enterprise network) for the automatic discovery process.
HiPath Wireless Controller, Access Points and Conver gence Sof tware relies
on the DNS for Layer 3 deployments and for static configuration of Wireless
APs. The controller can be registered in DNS, to provide DNS assisted AP
discovery. In addition, DNS can also be used for resolving RADIUS server
hostnames.
•Web Authentication Server – A server that can be used for external Captive
Portal and external authentication. The HiPath Wireless Controller has an
internal Captive portal presentation page, which allows Web authentication
(Web redirection) to take place without the need for an external Captive Portal
server.
•RADIUS Accounting Server (Remote Access Dial-In User Service)
(RFC2866) – A server that is required if RADIUS Accounting is enabled.
•Simple Network Management Protocol (SNMP) – A Manager Server that
is required if forwarding SNMP messages is enabled.
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•Network infrastructure – The Ethernet switches and routers must be
configured to allow routing between the various services noted above.
Routing must also be enabled between multiple HiPath Wireless Controllers
for the following features to operate successfully:
•Availability
•Mobility
•Mitigator for detection of rogue access points
Some features also require the definition of static routes.
•Web Browser – A browser provides access to the HiPath Wireless Controller
Management user interface to configure the Controller, Access Points and
Convergence Software.
•SSH Enabled Device – A device that supports Secure Shell (SSH) is used
for remote (IP) shell access to the system.
•Zone Integrity – The Zone integrity server enhances network security by
ensuring clients accessing your network are compliant with your security
policies before gaining access. Zone Integrity Release 5 is supported.
•HiPath HiGuard – Provides continuous active intrusion detection and
prevention capabilities. For more information, see the HiPath HiGuard
documentation.
2.3.1 Network traffic flow
Figure 3 illustrates a simple configuration with a single HiPath Wireless Controller
and two Wireless APs, each supporting a wireless device. A RADIUS server on
the network provides authentication, and a DHCP server is used by the Wireless
APs to discover the location of the HiPath Wireless Controller during the initial
registration process. Network inter-connectivity is provided by the infrastructure
routing and switching devices.
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Packet transmission
Control and Routing
>HWC authenticates wireless user
>HWC forwards IP packet to wired
network
Tunnelling
>AP sends data traffic to HWC
through UDP tunnel called WASSP
>HWC controls Wireless AP
through WASSP tunnel
>Using WASSP tunnels, HWC
allows wireless clients to roam to
Wireless APs on different HWCs
802.11 packet transmission
RADIUS
Authentication
Server
HiPath Wireless
Controller
DHCP
Server
External
CP Server
Wireless APs
External Web
Authentication
Server
Router/Switch
802.11 beacon and probe, wireless
device associates
with a Wireless AP
by its SSID
Figure 3Traffic Flow diagram
Each wireless device sends IP packets in the 802.1 1 standard to the Wireless AP.
The Wireless AP uses a UDP (User Datagram Protocol) based tunnelling
protocol. In tunneled mode of operation, it encapsulates th e packets and forwards
them to the HiPath Wireless Controller. The HiPath Wireless Controller
decapsulates the packets an d routes these to destinations on the network. In a
typical configuration, access points can be configured to locally bridge traffic (to
a configured VLAN) directly at their network point of attachment.
The HiPath Wireless Controller functions like a standard L3 router or L2 switch. It
is configured to route the network traffic associated with wireless connected
users. The HiPath Wireless Controller can also be configured to simply forward
traffic to a default or static route if dynamic routing is not preferred or available.
Wireless Devices
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30HiPath Wireless Controller, Access Points and Conver ge n ce Software V7.31, User Guide
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