Cisco Systems 102066 Users Manual
Cisco Aironet 1240AG Series Access Point
Hardware Installation Guide
April 2007
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Text Part Number: OL-8371-05
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STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT
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The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required
to correct the interference at their own expense.
The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not
installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to
comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable
protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.
Modifying the equipment without Cisc o’s writ ten author ization m ay resul t in the equi pment no lo nger comp lyi ng with FCC requi rements for Class A or Class B digital
devices. In that event, your right to use the equ ipment may be limit ed by FCC regul ations , and you may be required to correct a ny interference to radio or television
communications at your own expense.
You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probab ly caused by the Cisco equipment or one of its
peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following meas ures:
• Turn the television or radio antenna unt il the int erference st ops.
• Move the equipment to one side or the other of the tel evisio n or radi o.
• Move the equipment farther away from the televi sion or radio.
• Plug the equipment into an outlet that is on a di fferent cir cuit from the televi sion o r radio. (That is, make certain th e equipment and the te levision or radio are on circuit s
controlled by different circuit breaker s o r fu ses.)
Modifications to this product no t author ized by Ci sco Syst ems, Inc. coul d voi d the FCC appro val and negate your authorit y to op erate the pr odu ct.
The Cisco implementation of TCP head er compressi on is an adap tation of a program developed by the Universi ty of Ca lifornia, Berk eley (UCB) as part of UCB ’s public
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Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the
document are shown for illustrative pur poses onl y. Any use of act ual IP addr ess es in ill ustr ativ e conte nt is uninte ntio nal and coincident al.
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
© 2007 Cisco Systems, Inc. All rights rese rved.
CONTENTS
Preface ix
Audience ix
Purpose ix
Organization ix
Conventions x
Related Publications xii
Locating the Product Serial Number xiii
Obtaining Documentation, Obtaining Support, and Security Guidelines xiv
CHAPTER
1 Overview 1-1
Product Terminology 1-1
Autonomous Access Points 1-1
Lightweight Access Points 1-2
Guidelines for Using Cisco Aironet Lightweight Access Points 1-2
Hardware Features 1-3
Network Examples with Autonomous Access Points 1-8
Root Access Point on a Wired LAN 1-9
Repeater Unit that Extends Wireless Range 1-10
Central Unit in an All-Wireless Network 1-11
Bridge Network with Wireless Clients 1-11
Point-to-Point Bridge Configuration 1-12
Workgroup Bridge Network 1-12
Single or Dual-Radio Operation 1-5
Antennas Supported 1-5
Ethernet Port 1-5
Console Port 1-5
LEDs 1-6
Power Sources 1-6
UL 2043 Certification 1-7
Anti-Theft Features 1-7
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Network Example with Lightweight Access Points 1-13
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Contents
CHAPTER
2 Installing the Access Point 2-1
Safety Information 2-2
FCC Safety Compliance Statement 2-2
General Safety Guidelines 2-2
Warnings 2-2
Unpacking the Access Point 2-3
Package Contents 2-3
Basic Installation Guidelines 2-4
Controller Discovery Process for Lightweight Access Points 2-4
Deploying the Access Points on the Wireless Network 2-5
Access Point Layout and Connectors 2-6
Mounting Overview 2-7
Mounting on a Horizontal or Vertical Surface 2-9
Mounting Below a Suspended Ceiling 2-10
Mounting Above a Suspended Ceiling 2-11
Mounting Access Point on a Desktop or Shelf 2-14
Cable Security Bracket 2-14
Removing the Cable Security Bracket 2-15
CHAPTER
Attaching the Access Point to the Mounting Plate 2-16
Securing the Access Point 2-17
Using a Security Cable 2-17
Securing the Access Point to the Mounting Plate 2-18
Connecting the Ethernet and Power Cables 2-20
Connecting to an Ethernet Network with an Inline Power Source 2-21
Connecting to an Ethernet Network with Local Power 2-22
Powering Up the Access Point 2-22
3 Troubleshooting 1240AG Series Autonomous Access Points 3-1
Checking the Lightweight Access Point LEDs 3-2
Checking Basic Settings 3-3
Default IP Address Behavior 3-4
Enabling the Radio Interfaces 3-4
SSID 3-4
WEP Keys 3-4
Security Settings 3-5
Low Power Condition 3-5
Intelligent Power Management 3-6
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Inline Power Status Messages 3-7
Configuring Power Using the CLI 3-9
Issuing the Cisco IOS Command Using the CLI 3-10
Configuring the Access Point System Power Settings Using a Browser 3-11
Running the Carrier Busy Test 3-13
Running the Ping Test 3-14
Resetting to the Default Configuration 3-14
Using the MODE Button 3-15
Using the Web Browser Interface 3-15
Reloading the Access Point Image 3-16
Using the MODE Button 3-16
Web Browser Interface 3-17
Browser HTTP Interface 3-17
Browser TFTP Interface 3-18
Contents
CHAPTER
Obtaining the Access Point Image File 3-19
Connecting to the Access Point Locally 3-20
Obtaining the TFTP Server Software 3-20
4 Troubleshooting 1240AG Series Lightweight Access Points 4-1
Guidelines for Using Cisco Aironet Lightweight Access Points 4-2
Using DHCP Option 43 4-2
Checking the Lightweight Access Point LEDs 4-3
Low Power Condition for Lightweight Access Points 4-5
Intelligent Power Management 4-5
Configuring Power Using Controller CLI Commands 4-6
Manually Configuring Controller Information Using the Access Point CLI 4-7
Configuring Controller Information 4-8
Clearing Manually Entered Controller Information 4-8
Manually Resetting the Access Point to Defaults 4-8
Returning the Lightweight Access Point to Autonomous Mode 4-9
Using a Controller to Return the Access Point to Autonomous Mode 4-9
Using the MODE Button to Return the Access Point to Autonomous Mode 4-9
MODE Button Setting 4-10
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Obtaining the Autonomous Access Point Image File 4-10
Connecting to the Access Point Locally 4-11
Obtaining the TFTP Server Software 4-12
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Contents
APPENDIX
APPENDIX
A Translated Safety Warnings A-1
B Declarations of Conformity and Regulatory Information B-1
Manufacturers Federal Communication Commission Declaration of Conformity Statement B-2
VCCI Statement for Japan B-3
Department of Communications—Canada B-4
Canadian Compliance Statement B-4
European Community, Switzerland, Norway, Iceland, and Liechtenstein B-4
Declaration of Conformity with Regard to the 1999/5/EC (R&TTE Directive) B-5
Declaration of Conformity for RF Exposure B-7
Guidelines for Operating Cisco Aironet Access Points in Japan B-8
Japanese Translation B-8
English Translation B-8
Administrative Rules for Cisco Aironet Access Points in Taiwan B-9
Access Points with IEEE 802.11a Radios B-9
Chinese Translation B-9
English Translation B-9
All Access Points B-10
Chinese Translation B-10
English Translation B-10
APPENDIX
APPENDIX
APPENDIX
APPENDIX
APPENDIX
Declaration of Conformity Statements B-11
Declaration of Conformity Statements for European Union Countries B-11
C Access Point Specifications C-1
D Channels and Maximum Power Levels D-1
E Console Cable Pinouts E-1
Overview E-2
Console Port Signals and Pinouts E-2
F Priming Lightweight Access Points Prior to Deployment F-1
G Configuring DHCP Option 43 for Lightweight Access Points G-1
Overview G-2
Configuring Option 43 for 1000 Series Access Points G-3
Configuring Option 43 for 1100, 1130, 1200, 1240, and 1300 Series Lightweight Access Points G-4
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G
LOSSARY
I
NDEX
Contents
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Contents
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Audience
Preface
This guide is for the networking professional who installs and manages the Cisco Aironet 1240AG Series
Access Point. The 1 240AG series ac cess poi nt is available in auton omo us an d ligh twei ght
configurations.
To use this guide with autonomous access points, you should have experience working with Cisco IOS
software and be familiar with the concepts and terminology of wireless local area networks.
To use this guide wit h light weigh t a cce ss po ints, you sh ould have experienc e worki ng with a Ci sco
Wireless LAN Controller and be familiar w ith the con cepts an d termin ology of wire less local ar ea
networks.
Purpose
This guide provides the infor mation you need to insta ll your au tonomou s or ligh tweight ac cess poin t.
For detailed information about Cisco IOS commands used with autonomous access points, refer to the
Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges for this release. For
information about the standard Cisco IOS Release 12.3 commands, refer to the Cisco IOS documentation
set available from the Cisco.com home page at Technical Support & Documentation. On the Technic al
Support & Documentation home page, click Cisco IOS Software > Cisco IOS Software Releases 12.3
Mainline.
For information about Cisco Wireless LAN Controllers, refer to the Cisco documentation sets available
from the Cisco.com h ome pa ge at Technical Support & Documentation. On the Technical Su ppo rt &
Documentation hom e page, cli ck Wireless and the documentation is listed under the “Wireless LAN
Controllers” section.
Organization
This guide is organized into these chapters:
Chapter 1, “Overview,” lists the software and hardware features of the access point and describes the
access point’s role in your networ k.
Chapter 2, “Installing the Access Point,” describes how to mount the access point on a desktop, wall, or
ceiling, how to con ne ct Et her net , seri al, an d power cables, and provi des an in st alla tio n sum ma ry, safety
warnings, and general gui deline s.
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Conventions
Preface
Chapter 3, “Troubleshooting 124 0AG Series Autonomous Acce ss Points,” provides trouble shootin g
procedures for basic probl ems with the aut onomous ac cess point.
Chapter 4, “Troubleshooting 1240AG Series Light weight Acce ss Points,” provides troub lesh ooting
procedures for basic pr oblems with the lightwe ight acce ss point.
Appendix A, “Translated Safety Warnings,” provides translations of the safety warnings that appear in
this publication.
Appendix B, “D ecl ara tio ns of Conf or mity and Regula tory I nfo rm ation, ” provides declarations of
conformity and regulatory information for the access point.
Appendix C, “Access Point Specifications,” lists technical specifications for the access point.
Appendix D, “Channels and Maximum Power Levels,” lists the autonomous access point radio channels
and the maximum power levels supported by the world’s regulatory domains.
Appendix E, “Conso le Cable Pinout s,” identifies the pinouts for the serial console cable that connects
to the access point’s serial console port.
Appendix F, “Priming Lightweight Access Points Prior to Dep loyment,” desc ribe s th e pro cedu re to
prime access points with controller information.
Appendix G, “Configuring DHCP Option 43 for Lightweight Access Points,” describes the procedure to
configure DHCP Option 43 for lig htwei ght acce ss points.
Conventions
This publication use s the se conventions to co nvey instructions a nd info rma tion:
Command descriptions use th ese conventions:
Interactive examples use these conventions:
Notes, cautions, and timesavers use these conventions and symbols:
Tip Means the following will help you solve a problem. The tips information might not be troubleshooting
or even an action, but cou ld b e useful info rma tion.
• Commands and keywords are in boldfac e text.
• Arguments for which you supply values are in it alic.
• Square brackets ([ ]) mean optional elements.
• Braces ({ }) group required choices, and vertical bars ( | ) separate the alternative elements.
• Braces and vertical bars within square brackets ([{ | }]) mean a required choice within an optional
element.
• Terminal sessions and system displays are in screen font.
• Information you ent er i s in boldface screen font.
• Nonprinting charac ters, such as passwords or tab s, are i n angle bra ckets (< >) .
Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in
this manual.
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
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Preface
Conventions
Caution Means reader be careful. In this situation, you might do something that could result equipment damage
or loss of data.
Warning
Waarschuwing
Varoitus
Attention
Warnung
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. (To see translations of the warnings that appear
in this publication, refer to the appendix “Translated Safety Warnings.”)
Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan
veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij
elektrische schakelingen betrokken risico’s en dient u op de hoogte te zijn van standaard
maatregelen om ongelukken te voorkomen. (Voor vertalingen van de waarschuwingen die in deze
publicatie verschijnen, kunt u het aanhangsel “Translated Safety Warnings” (Vertalingen van
veiligheidsvoorschriften) raadplegen.)
Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen
kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja
tavanomaisista onnettomuuksien ehkäisykeinoista. (Tässä julkaisussa esiintyvien varoitusten
käännökset löydät liitteestä "Translated Safety Warnings" (käännetyt turvallisuutta koskevat
varoitukset).)
Ce symbole d’avertissement indique un danger. Vous vous trouvez dans une situation pouvant
entraîner des blessures. Avant d’accéder à cet équipement, soyez conscient des dangers posés par
les circuits électriques et familiarisez-vous avec les procédures courantes de prévention des
accidents. Pour obtenir les traductions des mises en garde figurant dans cette publication, veuillez
consulter l’annexe intitulée « Translated Safety Warnings » (Traduction des avis de sécurité).
Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer
Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie
sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur
Vermeidung von Unfällen bewußt. (Übersetzungen der in dieser Veröffentlichung enthaltenen
Warnhinweise finden Sie im Anhang mit dem Titel “Translated Safety Warnings” (Übersetzung der
Warnhinweise).)
Avvertenza
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Advarsel
Questo simbolo di avvertenza indica un pericolo. Si è in una situazione che può causare infortuni.
Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti
elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione
delle avvertenze riportate in questa pubblicazione si trova nell’appendice, “Translated Safety
Warnings” (Traduzione delle avvertenze di sicurezza).
Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du
utfører arbeid på utstyr, må du være oppmerksom på de faremomentene som elektriske kretser
innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. (Hvis du vil se
oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i vedlegget "Translated
Safety Warnings" [Oversatte sikkerhetsadvarsler].)
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
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Related Publications
Preface
Aviso
¡Advertencia!
Varning!
Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos
fisicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos
relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir
possíveis acidentes. (Para ver as traduções dos avisos que constam desta publicação, consulte o
apêndice “Translated Safety Warnings” - “Traduções dos Avisos de Segurança”).
Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular
cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los
procedimientos estándar de prevención de accidentes. (Para ver traducciones de las advertencias
que aparecen en esta publicación, consultar el apéndice titulado “Translated Safety Warnings.”)
Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada.
Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och
känna till vanligt förfarande för att förebygga skador. (Se förklaringar av de varningar som
förekommer i denna publikation i appendix "Translated Safety Warnings" [Översatta
säkerhetsvarningar].)
Related Publications
These documents provide informa tion abo ut the auto nomous acc ess point :
• Release Notes for Cisco Aironet Access Points
• Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges
• Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
These documents pr ovide inf orm a tion a bo ut t he ligh twe ight ac cess po int and th e c ontr oll er:
• Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points
• Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
Click this link to browse to the Cisco Wireless documentation home pa ge:
http://www.cisco.com/en/US/products/hw/wireless/tsd_produ cts_supp ort_cat egory_home.html
T o bro wse to the 1240AG series access point documentation, click Cisco Aironet 1240AG Series listed
under “Wireless LAN Access.”
T o browse to the Cisco W ireless LAN Controller docu mentation, click Cisco 4400 Series Wireless LAN
Controllers or Cisco 2000 Series Wireless LAN Controllers listed under “W ir eless LAN Controller s.”
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Preface
CAUTION
Hot
Surfaces
Locating the Product Serial Number
The access point serial number is on the bottom of the housing (refer to Figure 1).
Figure 1 Location of Serial Number Label
Locating the Product Serial Number
SN: NNNNNNNN
135531, 781-00426-01 A0
The access point serial number label contains the following information:
• Model number, such as AIR -AP1 242AG-A-k9 or AI R-LAP 1242AG-A-k9
• Serial number, such as VDF0636XXX X (11 alpha numeric digi ts)
• MAC address, such as 00abc65094f3 (12 hexadecimal digits)
SN: NNNNNNNN
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• Location of manufactu re, such as Made in Singapore
You need your product serial number when re questing sup port from the Cisco Technical Assistance
Center.
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xiii
Obtaining Documentation, Obtaining Support, and Security Guidelines
Obtaining Documentation, Obtaining Support, and Security
Guidelines
For information on obtaining docume ntatio n, obtai ning suppor t, providing doc umen tation fe edback ,
security guidelines, and also recommended aliases and general Cisco documents, see the monthly
What’s New in Cisco Product Documentation, w hic h al so l ist s al l new and revised Ci sco technical
documentation , at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Preface
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Overview
The Cisco Aironet 1240AG Series Access Point is available in autonomous and lig htwei ght
configurations. The au to nomous a ccess po i nts c an su ppo rt stan dal one ne twork c onfigura tio ns wi th all
configuration settings m ainta ined wit hin the ac cess points. T he li ghtw eight ac cess points ope rat e i n
conjunction with a Cisco wireless LAN contr ol ler with all configuration information maintained within
the controller.
Product Terminology
The following terms re fer to th e a ut onomou s and li ghtw eig ht p rod uc ts:
• The term access point de scribes bo th auton omous an d lightwe ight produc ts.
• The term autonomous ac cess point desc ribes only the autono mous product.
• The term lightweight access point describs only the light weigh t pr oduct .
• The term access point de scribes a produ ct opera ting as an acce ss point.
• The term bridge descr ibe s a p rod uct oper at ing as a b ridge .
CHA PTER
1
Autonomous Access Points
Cisco Aironet 1240AG Series A cce ss Poin t ( AIR-A P1242AG or AI R-AP12 42G ) pr ovides a sec ure,
affordable, and easy-to-use wireless LAN solution that combines mobility and flexibility with the
enterprise-class feat ures require d by networking prof essiona ls. With a management system based on
Cisco IOS software, the 1240 AG series is a Wi-Fi certified, wi rele ss LA N t ransc eiver.
The autonomous 12 42AG access point contains two integrated rad ios: a 2.4-GHz radio (IEEE 802.11g)
and a 5-GHz r adio (IEE E 80 1.11a ). T he aut on omo us 1242 G acce ss p oint con tai ns a si ngle int egrate d
radio: a 2.4-GHz radio (I EEE 802.1 1g).
The access point serves as the c onnect ion point be tween wireless and wired net works or as the center
point of a stand-alone wirele ss network. In large install ations, w ireless users wit hin radio ra nge of an
access point can roam throughout a facility while maintaining seamless, uninterrupted access to the
network.
You can configure and monitor the access point using the command-line interface (CLI), the
browser-based management system, or Simple Networ k Manageme nt Protocol (SN MP).
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1-1
Guidelines for Using Cisco Aironet Lightweight Access Points
Lightweight Access Points
The Cisco Aironet 1240AG Series Access Point (AIR -LAP124 2AG or AIR-LAP1242G) comb ines
mobility and flexib ility w ith the ent erp ri se-c lass fe atur es requ i red by n etwor king pr ofessi on als. These
lightweight access points are part of the Cisco Integrated Wireless Network Solution and require no
manual configur ation before they are mounted. The lightwe ight access point is automatically confi gured
by a Cisco wireless LAN controller (hereafter called a controller) using the Lightweight Acc ess Point
Protocol (LWAPP).
The lightweigh t 12 42AG access p oint con tai ns t wo in tegrate d rad ios: a 2 .4- GHz ra dio (IE EE 802. 11g)
and a 5-GHz r adio ( IEEE 80 1.11a ). The li ghtw ei ght 1 242 G a cce ss po int con tai ns a si ngle int egrated
radio: a 2.4-GHz radio (I EEE 802.1 1g). Us ing a cont roller, you can configure the ra dio setti ngs.
In the Cisco Centralized Wireless LAN architecture, access points operate in the lightweight mode (as
opposed to autonomous mode). The lightweight access points associate to a controller. The controller
manages the co nfigurati on, firm ware, a nd c ontr ol t ran sac ti ons suc h as 802.1x a uthe nt ic ation. I n
addition, all wireless tra ffic is tunneled through t he control ler.
LWAPP is an Internet Engineer ing Task Force (IETF) draft protocol th at de fines the c ontr ol me ssag ing
for setup and path authentication and run-time operations. L WAPP also defines the tunneling mechanism
for data tr affic.
Chapter 1 Overview
In an LWAPP environment, a lightweight access point discovers a controller by using LWAPP discovery
mechanisms and then sends i t a n LWAPP join request. The controller se nds the l ightw eig ht a cce ss poi nt
an L WAPP join response allowing the ac cess point to join the con troller . When th e access point is join ed,
the access point downloads its software if the versions on the access point and controller do not match.
After an access point joins a controller, you can reass ign it to any contro ller on your ne twork.
LWAPP secures the control communication between the lightweight access point and controller by
means of a secure key distribution, utilizing X.509 certificates on both the access point and controller.
This chapter provides information on the following topics:
• Guidelines for Usi ng Ci sco Air onet L ight we ight A cc ess Point s, pa ge 1-2
• Hardware Features , pa ge 1-3
• Network Examples with Autonomous Access Points, page 1-8
Guidelines for Using Cisco Aironet Lightweight Access Points
Yo u should keep these guide line s in mind when you use a light weig ht access poi nt:
• Lightweight access points c an onl y comm unic ate w ith Cisco 20 06 serie s wir eless LA N co ntrol le rs
or 4400 series controllers. C isco 4100 ser ies, Airespa ce 4012 ser ies, and Aire space 4024 series
controllers are not suppor ted becau se they lack the mem ory requi red to suppo rt access point s
running Cisco IO S so ftwa re.
• Lightweight acc ess po int s do n ot su ppo rt Wireless Dom ain Servi ces (W DS) and c annot
communicate with WDS devices. However, the controller provides functionality equivalent to WDS
when the access point associates to it.
• Lightweight access po ints suppor t e ight BSSID s per rad io a nd a tot al of e ight w ireless LA Ns p er
access point. When a lightweight access point associates to a controller, only wireless LANs with
IDs 1 through 8 are pushed to the access poi nt.
• Lightweight access points do not support Layer 2 LWAPP. They must get an IP address and discover
the controller usin g DH CP, DNS, or IP subnet broadcast.
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Chapter 1 Overview
• The lightweigh t acc ess p oi nt c on sole po rt i s en ab led fo r mo nit ori ng an d de bug purp ose s ( all
configuration commands are disabled when the access point is associated to a controller).
Hardware Features
Key hardware features of the access point incl ude:
• Dual-radio operation (see page 1-5)
• Ethernet port (see page 1-5)
• Console port (see pa ge 1-5)
• LEDs, (see page 1-6)
• Multiple power source s ( see page 1-6)
• UL 2043 certificatio n ( see pa ge 1-7)
• Anti-theft features (see page 1-7)
Refer to Appendix C, “Access Point Specifications,” for a list of access point specifications.
Figure 1-1 shows the access point with antennas.
Hardware Features
Figure 1-1 Access Point with Antennas
STATUS
ETHERNET
RADIO
MODE
CONSOLE
ETHERNET
48VDC
2.4 GHz RIGHT / PRIMARY
2.4 GHz LEFT
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Hardware Features
Chapter 1 Overview
Figure 1-2 illustrates the 2.4-GHz connector end of the access point.
Figure 1-2 Access Point 2.4 GHz Connector End
2.4 GHz LEFT
STATUS
RADIO
ETHERNET
CONSOLE
MODE
ETHERNET
48VDC
2.4 GHz RIGHT/PRIMARY
6 7 8 91 5432
1 2.4-GHz antenna connector (left) 6 Console port (RJ-45)
2 Ethern et LED 7 Ethernet port (RJ-45)
3 Radio LED 8 48-VDC power port
4 Status LED 9 2.4-GHz antenna connector (right/primary)
5 Mode button
Figure 1-3 illustrates the 5-GHz connector end of the access point.
Figure 1-3 Access Point 5-GHz Connector End
5 GHz ANTENNA w/RP-TNC
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LEFT
1
RIGHT / PRIMARY
23
1 5-GHz antenna connector (left) 3 Security key slot
2 5-GHz antenna connector (right/primary)
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Chapter 1 Overview
Single or Dual-Radio Operation
The 1242AG access poin t sup por ts si mul tane ou s r adio o pera tio n us ing a 2.4-G Hz 80 2.1 1g ra dio an d a
5-GHz 802.11a radio. The 1242G access point supports a single 2.4-GHz 802.11g radio. Each radio uses
dual-diversity integrated antennas.
The 5-GHz rad io i ncor por ate s a n U nli cense d Nati onal I nform at ion I nfrast r uctu re ( UNI I) radi o
transceiver operating in the UNII 5-G Hz freq uency bands. Th e 802.1 1g radio is called Radio0 and the
802.11a radio is called Ra dio1 .
Antennas Supported
Table 1-1 l ist s th e s uppo rte d ac cess point ant ennas.
Table 1-1 Supported Antennas
Hardware Features
Ethernet Port
Gain
2.4-GHz Antennas
Diversity ceiling omnidirectional 2 Articulated omnidirectional 3.5
Articulated dipole 2.2 Diversity omnidirectional 4.5
Ceiling omnidirectio nal 5.2 Omnidirectional 6
Wall patch directional 6 Diversity patch directional 7
Mast mount omni dire ctio na l 5.2 Patch directional 9.5
Diversity pillar omnidirectiona l 5.2
Diversity patch directional 6.5
Patch directional 9
Yagi directional 10
The auto-sensing Ethernet port (see Figure 1-2) accepts an RJ-45 connector, linking the access point to
your 10BASE-T or 100BASE-T Ethernet LAN. The access point can receive power through the Ethernet
cable from a power injector, switch, or power patch pane l. Th e Eth ern et MAC address is print ed on th e
label on the back of the access point (refer to the “Locating the Produc t Se ria l Num ber” sec tion o n
page xiii).
(dBi) 5-GHz Antennas
Gain
(dBi)
Console Port
Note After completin g y our c onfigura tio n cha ng es, y ou mu st re move the seri al cabl e f rom th e acc ess po in t.
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The serial console po rt can be us ed to moni tor the ac cess poin t power-up sequence s using a ter minal
emulator program. The port is located on the end of the unit (see Figure 1-2). Use an RJ-45 to DB-9 serial
cable to connec t yo ur c omput er’s COM port to t he ac cess po int ’s serial console port . (Ref e r to
Appendix E, “Conso le Cable Pinout s,” fo r a descriptio n of the console por t pinouts.) Assign the
following port settings to a terminal emulator to open the management system pages: 9600 baud, 8 data
bits, No parity, 1 stop bit, a nd no fl ow cont rol.
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
1-5
Hardware Features
LEDs
Power Sources
Chapter 1 Overview
The access point has three LEDs to indicat e Ethernet acti vity, radio activity , and statu s indications (refe r
to the “Checking the Ligh tweight Access Point LEDs” se ction on page 3-2 or the “Checking the
Lightweight Access Point LEDs” section on page 4-3 for additional information). Figure 1-2 shows the
location of the LEDs.
• The Status LED provid es gene ra l op er ating st atu s a nd err or indic ati on s.
• The Ethernet LED sign als Ethern et tra ffic on the wired Ethern et LAN and pr ovides Ethe rnet error
indications.
• The Radio LED signals that wireless packets are being transmitted or received over the radio
interface and provides radio e rror indi cations.
The access point can receive power from an external power module or from inline power using the
Ethernet cable. The access point supports the IEEE 802.3af inline power standard and Cisco CDP Power
Negotiation. Using inline power, you do not need to run a power cord to th e access point because power
is supplied over the Ethernet cable.
Warning
Caution Be careful when handling the access po int; the botto m plate might be ho t.
This product must be connected to a Power over Ethernet (PoE) IEEE 802.3af compliant power source
or an IEC60950 compliant limited power source.
Statement 353
The access poin t sup por ts t he f ol lowing power source s:
• Power module
• Inline power:
–
Cisco Aironet Power Injector (AIR-PWRINJ3 or AIR-PWRINJ-FIB)
–
An inline power capable swi tch, s uch a s th e Cisc o C ataly st 35 50 PWR X L, 3 560- 48PS,
3570-48PS, 4500 with 802.3A F PoE module, or the 650 0 with 802.3A F PoE module
–
Other inline power swi tc hes sup port ing th e IE EE 8 02.3a f inlin e power stan da rd
Note Some switches and patch pan els m ight not provide eno ugh power to ope rate t he a cce ss point w it h bot h
2.4-GHz and 5-GHz radios. At power-up, if the access point is unable to determine that the power source
can supply sufficient power, the access point automatically deactivates both radios to prevent an
over-current condition. The access poi nt also activates a Status LED low power error indicat ion and
creates an error log entry (refer to the “Checking the Lightweight Access Point LEDs” sec tion on
page 3-2 and the “Checking Basic Settings” section on page 3-3).
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Chapter 1 Overview
UL 2043 Certification
The access point has ad equate fire resistance and low smoke-produci ng charac teri stics suitab le for
operation in a building's environmental air space, such as above suspended ceilings, in accordance with
Section 300-22(c) of the NEC, and with Sec tions 2- 128, 12-0 10(3) and 12- 100 of the Canadian
Electrical Code, Part 1, C 22. 1.
Caution Only the fiber-optic power injector (AIR-PWRINJ-FIB) has been tested to UL 2043 fo r operat ion in a
building’s environmental air space; the AIR- PWRINJ 3 power inj ect or a nd the p ower modu le ar e not
tested to UL 2043 and should not be placed in a building’s environmental air space, such as above
suspended ceilings.
Anti-Theft Features
There are three methods of securing the access point:
• Security cable keyhole—You can use the security cable slot (see Figure 1-3) to secure the access
• Security hasp—When you mount the access point on a wall or ceiling using the mounting plate and
Hardware Features
point using a standard securi ty cable , like those use d on laptop computers (r efer to the “Using a
Security Cable” section on page 2-17).
the security hasp, you can lock the access point to the plate with a padlock (see Figure 1-4).
Compatible padlocks ar e Master Loc k models 12 0T and 121 T or equivalent.
Figure 1-4 Access Point with Security Hasp and Padlock
2.4 GHz LEFT
2.4 GHz RIGHT / PRIMARY
1
2
1 Security hasp 2 Security padlock
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1-7
Network Examples with Autonomous Access Points
• Cable security bracket—The cable security bracket (see Figure 1-5) attaches to the mounting plate
and covers the consol e port , Et hern et por t, p ower p ort, and t he m ode button to prevent the
installation or removal of the cables or the act i vation of the mode butto n. The cable secur ity bra cket
is user removable pr ior to at tac hin g the m oun tin g p lat e t o a c eil ing or wall .
Figure 1-5 Access Point with Mounting Plate and Cable Security Bracket
Chapter 1 Overview
STATUS
2.4 GHz LEFT
RADIO
ETHERNET
ETHERNET
48VDC
2.4 GHz RIGHT / PRIMARY
1
2
3
1 Mounting plate 3 Access point
2 Cable security bracket
Network Examples with Autonomous Access Points
This section describes the autono mous a ccess p oint’s role in three common wireless network
configurations. The au tonomous a ccess point ’s default configuration is as a root unit co nnec ted to a
wired LAN or as the central unit in an all-wireless network.
The autonomous 1240AG series access point supports th ese opera ting wir eless modes:
• Root access point—Connected to a wired LAN and supports wireless clients.
• Repeater access point—Not connected to a wired LAN, associates to a root access point, and
supports wireless clients
• Workgroup bridge—Not connected to a wired LAN, associates to a root access point or bridge, and
supports wired network devices.
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• Root bridge—Conne cted t o a w ired LA N a nd sup por ts no n-r oo t br idge s and wi reless cli ent s.
• Non-root bridge — Not co nne cte d t o a wir ed LAN, a ssoci ates to a r oot bri dg e, su ppo rts w ire les s
clients, and supports wired clients.
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Chapter 1 Overview
Root Access Point on a Wired LAN
An autonomous access point connected directly to a wired LAN provides a connection point for wireless
users. If more th an o ne auto nomo us acce ss point i s conn ected to th e LAN, user s can r oam fro m one a rea
of a facility to another without losing their connect ion to the netw ork. As users mov e out of range of one
access point, they automatically connect to the network (associate) through another access point. The
roaming process is seamless and transparent to the user. Figure 1-6 shows access points acting as root
units on a wired LAN.
Figure 1-6 Access Points as Root Units on a Wired LAN
Network Examples with Autonomous Access Points
Access point
Access point
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Network Examples with Autonomous Access Points
Repeater Unit that Extends Wireless Range
An autonomous access po int can be co nfigured as a stand- alone re peater to extend the ran ge of your
infrastructure o r to ove rcome an obstac le that bloc ks radio com munication. The repeater fo rwards tr aff ic
between wireless users and th e wir ed LAN by sending packets to either anoth er re peater or to an access
point connected to the wired LAN. The data is sent through the route that provides the best performance
for the client. Figu re 1- 7 shows an autonomous access point acting as a repeater. Consult the Cisco IOS
Software Configuration Guide for Cisco Aironet Access Points for instructions on set ting up an ac cess
point as a repeater.
Note Non-Cisco client devices might have difficulty comm unic ating wi th r epea ter ac cess points.
Figure 1-7 Access Point as Repeater
Chapter 1 Overview
Access point Repeater
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Chapter 1 Overview
1
Central Unit in an All-Wireless Network
In an all-wireless network, an autonomous access point acts as a stand-alone root unit. The autonomous
access point is not attached to a wired LAN; it functions as a hub linking all stations together . The acce ss
point serves as the focal point for comm unication s, incr easing the commu nicat ion range of w ireless
users. Figure 1-8 shows an autonomous access point in an all-wireless network.
Figure 1-8 Access Point as Central Unit in All-Wireless Network
Access point
Network Examples with Autonomous Access Points
Bridge Network with Wireless Clients
The access po int sup por ts root b ridg e and non- ro ot b ridge role s u sed to int erco nne ct a re m ote LAN to
the main LAN (see Figure 1-9). The bridge units can also support wireless clients.
Figure 1-9 Root Bridge and Non-root Bridge with Clients
Root bridge Non-root bridge
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Network Examples with Autonomous Access Points
Point-to-Point Bridge Configuration
In a point-to-point bri dge configur ation , two bri dges int erco nnec t two L AN net works u sing a wi reless
communication l ink (see Figu re 1-10). The bridge connect ed to the mai n LAN ne twork is classified as
a root bridge and the othe r bridge is cl assified as a non -root bri dge.
Figure 1-10 Point-to-Point Bridge Configuration
Chapter 1 Overview
Workgroup Bridge Network
The access point su ppo rts a work grou p br idge r ole to i nte rconn ec t re mot e Et hern et workst at ions to t he
main LAN. The workgroup br idge can commun icate w ith an access poi nt (see Figure 1-11) or with a
bridge (see Figu re 1 -12 ).
Figure 1-11 Workgroup Bridge Communicating with an Access Point
Root bridge Non-root bridge
Access point
Workgroup bridge
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1-12
Figure 1-12 Workgroup Bridge Communicating with a Bridge
Bridge Workgroup
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
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Chapter 1 Overview
1
Network Example with Lightweight Access Points
Network Example with Lightweight Access Points
The lightweight access points support Layer 3 network operation. Lightweight access points and
controllers in L aye r 3 c on figuratio ns use I P a ddr esses an d UD P p acket s, w hic h ca n be ro ut ed t hr ough
large networks. Layer 3 o pera tio n is sca la ble an d re co mm ended by Ci sco.
This section illustrates a typical wireless network configuration containing lig htweight access points and
a Cisco Wireless LAN Controlle r (se e Fi gure 1-13).
Figure 1-13 Typical Lightweight Access Point Network Configuration Example
LWAPP
LWAPP
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1-13
Network Example with Lightweight Access Points
Chapter 1 Overview
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CHA PTER
2
Installing the Access Point
This chapter describes the installation of the access point and includes these sections:
• Safety Informat ion, p age 2-2
• Warnings, page 2-2
• Unpacking the Access Po int, page 2-3
• Basic Installation Guidelines, page 2-4
• Controller Discovery Process for Lightweight Access Points , page 2- 4
• Mounting Overview, page 2-7
• Mounting on a Horizontal or Vertical Surface, page 2-9
• Mounting Below a Suspended Ceiling, page 2 -10
• Mounting Above a Suspended Ceiling, page 2-11
• Mounting Access Poi nt o n a Deskt op or Shel f, pa ge 2-14
• Cable Security B ra cket, page 2-14
• Attaching the Access Point to the Mounting Plate, page 2-16
• Securing the Access Point, page 2-17
• Connecting the Ethernet and Power Cables, page 2-20
• Powering Up the Access Point, page 2-22
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2-1
Safety Information
Safety Information
Follow the guidelines in this section to ensure proper operation and safe use of the access point.
FCC Safety Compliance Statement
The FCC with its action in ET Do cket 96-8 has adop ted a safe ty standar d for human exposur e to radio
frequency (RF) electromagnetic energy emitted by FCC certified equipment. When used with approved
Cisco Aironet antennas, Ci sco Airo net product s meet th e uncont rolled environmental limits fou nd in
OET-65 and ANSI C95.1, 1991 . Proper installat ion of this ra dio acc ording to the instruc tions fou nd in
this manual will result in user exposure that is substantially below the FCC recommended limits.
General Safety Guidelines
Do not hold any c om ponent co ntain in g a radi o so th at th e an ten na is ver y c lose t o or t ou chin g a ny
exposed parts of the body, especially the face or eyes, while transmitting.
Chapter 2 Installing the Access Point
Warnings
Warning
Warning
Warning
Warning
Translated versions of the following safety warnings are provided in Appendix A, “Translated Safe ty
Warnings.”
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. Use the statement number provided at the end of
each warning to locate its translation in the translated safety warnings that accompanied this device.
Statement 1071
SAVE THESE INSTRUCTIONS
Read the installation instructions before you connect the system to its power source.
This product must be connected to a power-over-ethernet (PoE) IEEE 802.3af compliant power source or an
IEC60950 compliant limited power source.
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than: 20A
Statement 353
Statement 1005
Statement 1004
2-2
Warning
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
Do not operate your wireless network device near unshielded blasting caps or in an explosive
environment unless the device has been modified to be especially qualified for such use.
Statement 245B
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