Specifications in this manual are subject to change without notice.
Originated in the USA.
Trademarks
AOS-W, Alcatel 4308, Alcatel 4324, Alcatel 6000, Alcatel 41, Alcatel 60/61/65,
Alcatel 70, and Alcatel 80 are trademarks of Alcatel Internetworking, Inc. in the
United States and certain other countries.
Any other trademarks appearing in this manual are the property of their respective
companies.
Legal Notice
The use of Alcatel Internetworking Inc. switching platforms and software, by all
individuals or corporations, to terminate Cisco or Nortel VPN client devices
constitutes complete acceptance of liability by that individual or corporation for
this action and indemnifies, in full, Alcatel Internetworking Inc. from any and all
legal actions that might be taken against it with respect to infringement of
copyright on behalf of Cisco Systems or Nortel Networks.
Configuring Captive Portal with the Policy Enforcement Firewall
License
Example Authentication with Captive Portal
Configuring Policies and Roles
Configuring the Guest VLAN
Configuring Captive Portal Authentication
Modifying the Initial User Role
Configuring the AAA Profile
Configuring the WLAN
Basic HTML Example
Installing a New Captive Portal Page
Displaying Authentication Error Message
Reverting to the Default Captive Portal
Language Customization
Customizing the Welcome Page
Customizing the Pop-Up box
Customizing the Logged Out Box
A list of related documentation for further reading
A key to the various text conventions used throughout this manual
Alcatel support and service information
Document Organization
This user guide includes instructions and examples for commonly-used wireless
LAN (WLAN) Switch configurations such as Virtual Private Networks (VPNs),
authentication, and redundancy.
Volume 1 contains an overview of the Alcatel OmniAccess system. Volume 2
describes how to install the Alcatel OmniAccess system in a wired network.
Volume 3 describes how to configure Alcatel access points (APs), including
remote APs. The remaining volumes of the user guide describe other features of
the Alcatel OmniAccess system.
Related Documents
The following items are part of the complete documentation for the Alcatel
OmniAccess system:
Alcatel WLAN Switch Installation Guides
Alcatel Access Point Installation Guides
Release Notes
AOS-W 3.117
User Guide
Preface
Text Conventions
The following conventions are used throughout this manual to emphasize
important concepts:
TABLE 1Text Conventions
Type StyleDescription
ItalicsThis style is used to emphasize important terms and to mark
the titles of books.
System itemsThis fixed-width font depicts the following:
Sample screen output
System prompts
Filenames, software devices, and specific commands
when mentioned in the text
CommandsIn the command examples, this bold font depicts text that
you must type exactly as shown.
<Arguments>In the command examples, italicized text within angle
brackets represents items that you should replace with
information appropriate to your specific situation. For
example:
# send<text message>
In this example, you would type “send” at the system
prompt exactly as shown, followed by the text of the
message you wish to send. Do not type the angle brackets.
[ Optional ]In the command examples, items enclosed in brackets are
optional. Do not type the brackets.
{ Item A | Item B }In the command examples, items within curled braces and
separated by a vertical bar represent the available choices.
Enter only one choice. Do not type the braces or bars.
18AOS-W 3.1032063-00 Rev A
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Contacting Alcatel
Contact Center Online
Main Sitehttp://www.alcatel.com/enterprise
Support Sitehttp://eservice.ind.alcatel.com
Emailsupport@ind.alcatel.com
Sales & Support Contact Center Telephone
North America1-800-995-2696
Latin America1-877-919-9526
Europe+33 (0) 38 85 56 92 9
Asia Pacific+65 6586 1555
Worldwide1-818-880-3500
Preface
AOS-W 3.119
User Guide
Preface
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Volume 1
Introducing the
Alcatel
OmniAccess
System
AOS-W Version 3.1
22AOS-W 3.1032063-00 Rev A
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Overview of the Alcatel
OmniAccess System
Wireless local area networks (WLANs) allow users of personal computers with
wireless network interface adapters to communicate with each other and connect
to existing wired networks. The Alcatel OmniAccess system allows you to
implement WLANs in enterprise environments with lower cost of deployment,
simplified management, and multiple layers of security.
This chapter describes the components and features of the Alcatel OmniAccess
system, in the following topics:
“Alcatel OmniAccess System Components” on page 24
“Basic WLAN Configuration” on page 33
“Wireless Client Access to the WLAN” on page 39
“Configuring and Managing the Alcatel OmniAccess System” on page 42
1
AOS-W 3.123
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Overview of the Alcatel OmniAccess System
Chapter 1
Alcatel OmniAccess System Components
The Alcatel OmniAccess system consists of the following components:
Alcatel Access Points
Alcatel WLAN Switches
AOS-W
The following sections describe each of these components.
Alcatel Access Points
Alcatel Access Points (APs) operate exclusively with Alcatel WLAN Switches to
provide network access for wireless clients. Alcatel APs support Institute of
Electrical and Electronics Engineers (IEEE) 802.11a/b/g standards for wireless
systems.
OTE:Alcatel offers a range of APs that support various antenna types and
N
radio specifications. Refer to the Installation Guide for your Alcatel AP for
specific information about supported features.
An AP broadcasts its configured service set identifier (SSID), which corresponds
to a specific wireless local area network (WLAN). Wireless clients discover APs by
listening for broadcast beacons or by sending active probes to search for APs
with a specific SSID.
You can connect an Alcatel AP to an Alcatel WLAN Switch either directly with an
Ethernet cable or remotely through an IP network. Figure 1-1 shows two Alcatel
APs connected to an Alcatel WLAN Switch. One AP is connected to a switch in
the wiring closet that is connected to a router in the data center where the WLAN
Switch is located. The Ethernet port on the other AP is cabled directly to a port on
the WLAN Switch.
24AOS-W 3.1032063-00 Rev A
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FLOOR
WIRING
CLOSET
INTERNET
Overview of the Alcatel OmniAccess System
ALCATEL AP CONNECTED
THROUGHAN IP NETWORK
Chapter 1
ALCATEL AP CONNECTED
WITHAN ETHERNET CABLE
ALCATEL WLAN SWITCH
DATA CENTER
FIGURE 1-1Connecting APs to the Alcatel WLAN Switch
Alcatel APs are thin APs, which means their primary function is to receive and
transmit electromagnetic signals; other WLAN processing is left to the WLAN
Switch. When powered on, an Alcatel AP locates its host WLAN Switch through
a variety of methods, including the Alcatel Discovery Protocol (ADP), Domain
Name Service (DNS), or Dynamic Host Configuration Protocol (DHCP). When an
Alcatel AP locates its host WLAN Switch, it automatically builds a secure Generic
Routing Encapsulation (GRE) tunnel (Figure 1-2) to the WLAN Switch. The AP
then downloads its software and configuration from the WLAN Switch through
the tunnel.
AOS-W 3.125
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Overview of the Alcatel OmniAccess System
Chapter 1
FLOOR
WIRING
CLOSET
INTERNET
GRE TUNNEL
ALCATEL AP
GRE T
UNNEL
ALCATEL WLAN SWITCH
DATA CENTER
FIGURE 1-2Alcatel APs Establish GRE Tunnels to the WLAN Switch
Client traffic received by the AP is immediately sent through the tunnel to the host
WLAN Switch (Figure 1-3), which performs packet processing such as encryption
and decryption, authentication, and policy enforcement.
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FLOOR
WIRING
CLOSET
INTERNET
Overview of the Alcatel OmniAccess System
Chapter 1
WIRELESS CLIENTS
ALCATEL AP
DATA CENTER
ALCATEL WLAN SWITCH
FIGURE 1-3Client Traffic is Tunneled to the WLAN Switch
Automatic RF Channel and Power Settings
Adaptive Radio Management (ARM) is a radio frequency (RF) resource allocation
algorithm that you can enable and configure in the Alcatel Mobility Edge system.
When ARM is enabled, each Alcatel AP can determine the optimum channel
selection and transmit power setting to minimize interference and maximize
coverage and throughput. The APs scan for better channels at periodic intervals
and report information to the WLAN Switch. The WLAN Switch analyzes reports
from all APs and coordinates changes, resulting in a higher performing RF
environment.
If an AP fails for any reason, the Alcatel OmniAccess system’s self-healing
mechanism automatically ensures coverage for wireless clients. The WLAN
Switch detects the failed AP and instructs neighboring APs to increase power
levels to compensate.
You can also enable the system to detect coverage holes, or areas where a good
RF signal is not adequately reaching wireless clients.
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Chapter 1
RF Monitoring
An Alcatel AP can function as either a dedicated or shared Air Monitor (AM) to
monitor radio frequency (RF) spectrums to detect intrusions, denial of service
(DoS) attacks, and other vulnerabilities. A dedicated AM performs monitoring
functions exclusively and does not service wireless clients or advertise SSIDs. A
shared AM performs monitoring functions in addition to servicing wireless
clients.
Every AP automatically monitors the channel on which it services wireless clients.
You can configure the AP to perform off-channel scanning, where the AP spends
brief time intervals scanning other channels. However, the more clients an AP
services, the less time it has to perform off-channel scanning. If air monitoring
functions are critical to your network, Alcatel recommends that a few APs be
designated as dedicated AMs.
For example, you can configure dedicated AMs to perform the following
functions:
Detect, locate, and disable rogue APs (APs that are not authorized or
sanctioned by network administrators)
Detect and disable ad-hoc networks
Detect and disable honeypot APs
Detect wireless bridges
Capture remote packets
If air monitoring functions are only needed periodically, you can configure APs to
operate temporarily as AMs. You can also configure dedicated AMs to
automatically convert into APs if there is an AP failure or when there is high level
of traffic on the network.
Alcatel WLAN Switches
All Alcatel APs are connected either directly or remotely through an IP network to
an Alcatel WLAN Switch. The WLAN Switch is an enterprise-class switch that
bridges wireless client traffic to and from traditional wired networks and performs
high-speed Layer-2 or Layer-3 packet forwarding between Ethernet ports. While
Alcatel APs provide radio services only, the WLAN Switch performs upper-layer
media access control (MAC) processing, such as encryption and authentication,
as well as centralized configuration and management of SSIDs and RF
characteristics for Alcatel APs. This allows you to deploy APs with little or no
physical change to an existing wired infrastructure.
WLAN Switches provide 10/100 Mbps Fast Ethernet, IEEE 802.3af-compliant
ports that can provide Power over Ethernet (PoE) to directly-connected APs.
When you connect a PoE-capable port on the WLAN Switch to a PoE-compatible
device such as an Alcatel AP, the port automatically detects the device and
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Overview of the Alcatel OmniAccess System
Chapter 1
provides operating power through the connected Ethernet cable. This allows APs
to be installed in areas where electrical outlets are unavailable, undesirable, or not
permitted, such as in the plenum or in air handling spaces.
OTE:Alcatel offers a range of WLAN Switches that provide different port types
N
and traffic capacities. Refer to the Installation Guide for your Alcatel
WLAN Switch for specific information about supported features.
In an Alcatel OmniAccess system, at least one WLAN Switch is the master WLAN
Switch while non-master WLAN Switches are referred to as local WLAN Switches
(Figure 1-4). A master WLAN Switch offers a single point of configuration that is
automatically replicated from the master to local WLAN Switches throughout the
network.
Local WLAN Switches offer local points of traffic aggregation and management
for Alcatel APs and services. A local WLAN Switch can perform any supported
function (for example, WLAN management, policy enforcement, VPN services,
and so on), however these services are always configured on the master WLAN
Switch and are “pushed” to specified local WLAN Switches.
An Alcatel AP obtains its software image and configuration from a master WLAN
Switch; it can also be instructed by a master WLAN Switch to obtain its software
from a local WLAN Switch.
AOS-W 3.129
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Chapter 1
LOCAL WLAN
S
WITCH
MASTER WLAN
SWITCH
LOCAL WLAN
SWITCH
FIGURE 1-4Master and Local WLAN Switches
A typical OmniAccess system includes one master WLAN Switch, one or more
backup master WLAN Switches and any number of local WLAN Switches. It is
important to note that master WLAN Switches do not share information with
each other. Thus, APs that share roaming tables, security policies, and other
configurations should be managed by the same master WLAN Switch.
30AOS-W 3.1032063-00 Rev A
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