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BETA DRAFT - CISCO CONFIDENTIALCorporate HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706 USAhttp://www.cisco.comTel: 408 526-4000800 553-NETS (6387)Fax: 408 526-4100Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG)Installation and Configuration GuideCustomer Order Number: Text Part Number: OL-4211-01

BETA DRAFT - CISCO CONFIDENTIALiiiCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01CONTENTSPreface xiAudience xiiPurpose xiiOrganization xiiConventions xiiiRelated Publications xvObtaining Documentation xvCisco.com xvDocumentation CD-ROM xvOrdering Documentation xviDocumentation Feedback xviObtaining Technical Assistance xviCisco TAC Website xviOpening a TAC Case xviiTAC Case Priority Definitions xviiObtaining Additional Publications and Information xviiCHAPTER 1Product Overview 1-1Introduction to the Client Adapters 1-2Terminology 1-2Hardware Components 1-3Radio 1-3Radio Antenna 1-3LEDs 1-3Software Components 1-4Driver 1-4Client Utilities 1-4Network Configurations Using Client Adapters 1-5Ad Hoc Wireless LAN 1-5Wireless Infrastructure with Workstations Accessing a Wired LAN 1-6

BETA DRAFT - CISCO CONFIDENTIALContentsviiiCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01APPENDIX ATechnical Specifications A-1APPENDIX BTranslated Safety Warnings B-1Explosive Device Proximity Warning B-2Dipole Antenna Installation Warning B-3Warning for Laptop Users B-4APPENDIX CDeclarations of Conformity and Regulatory Information C-1Manufacturer’s Federal Communication Commission Declaration of Conformity Statement C-2Department of Communications – Canada C-3Canadian Compliance Statement C-3European Community, Switzerland, Norway, Iceland, and Liechtenstein C-3Declaration of Conformity with Regard to the R&TTE Directive 1999/5/EC C-3Declaration of Conformity for RF Exposure C-5Guidelines for Operating Cisco Aironet Wireless LAN Client Adapters in Japan C-5Japanese Translation C-5English Translation C-5Administrative Rules for Cisco Aironet Wireless LAN Client Adapters in Taiwan C-62.4- and 5-GHz Client Adapters C-6Chinese Translation C-6English Translation C-65-GHz Client Adapters C-7Chinese Translation C-7English Translation C-7APPENDIX DChannels, Power Levels, and Antenna Gains D-1Channels D-2IEEE 802.11a D-2IEEE 802.11b/g D-3Maximum Power Levels and Antenna Gains D-4IEEE 802.11a D-4IEEE 802.11b D-4IEEE 802.11g D-5

BETA DRAFT - CISCO CONFIDENTIALContentsixCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01APPENDIX EConfiguring the Client Adapter through Windows XP E-1Overview E-2Overview of Security Features E-2Static WEP Keys E-2EAP (with Dynamic WEP Keys) E-3Wi-Fi Protected Access (WPA) E-4Configuring the Client Adapter E-5Enabling EAP-TLS Authentication E-9Enabling PEAP Authentication E-12Enabling PEAP (EAP-MSCHAP V2) E-13Enabling PEAP (EAP-GTC) E-15Associating to an Access Point Using Windows XP E-17Viewing the Current Status of Your Client Adapter E-17GLOSSARYINDEX

BETA DRAFT - CISCO CONFIDENTIALContentsxCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01

BETA DRAFT - CISCO CONFIDENTIALxiCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01PrefaceThe preface provides an overview of the Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide, references related publications, and explains how to obtain other documentation and technical assistance, if necessary.The following topics are covered in this section:•Audience, page xii•Purpose, page xii•Organization, page xii•Conventions, page xiii•Related Publications, page xv•Obtaining Documentation, page xv•Obtaining Technical Assistance, page xvi•Obtaining Additional Publications and Information, page xvii

BETA DRAFT - CISCO CONFIDENTIALxiiiCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Preface Conventions•Appendix A, “Technical Specifications,” lists the physical, radio, power, and regulatory specifications for the client adapters.•Appendix B, “Translated Safety Warnings,” provides translations of client adapter safety warnings in nine languages.•Appendix C, “Declarations of Conformity and Regulatory Information,” provides declarations of conformity and regulatory information for the client adapters.•Appendix D, “Channels, Power Levels, and Antenna Gains,” lists the IEEE 802.11a, b, and g channels supported by the world's regulatory domains as well as the maximum power levels and antenna gains allowed per domain.•Appendix E, “Configuring the Client Adapter through Windows XP,” explains how to configure and use your client adapter with Windows XP.ConventionsThis publication uses the following conventions to convey instructions and information:•Commands and keywords are in boldface.•Variables are in italics.•Configuration parameters are capitalized.•Notes, cautions, and warnings use the following conventions and symbols:Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this manual.Caution Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data.WarningThis 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.”)WaarschuwingDit 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.)

BETA DRAFT - CISCO CONFIDENTIALxivCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01PrefaceConventionsVaroitusTämä 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).)AttentionCe 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).WarnungDieses 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).)AvvertenzaQuesto 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).AdvarselDette 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].)AvisoEste 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”).¡Advertencia!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.”)Varning!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].)

BETA DRAFT - CISCO CONFIDENTIALxvCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Preface Related PublicationsRelated PublicationsFor more information about Cisco Aironet CB21AG and PI21AG Wireless LAN Client Adapters for Windows, refer to the following publication:•Release Notes for Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG)For more information about related Cisco Aironet products, refer to the publications for your infrastructure device. You can access Cisco Aironet technical documentation at this URL:http://www.cisco.com/en/US/products/hw/wireless/index.htmlObtaining DocumentationCisco provides several ways to obtain documentation, technical assistance, and other technical resources. These sections explain how to obtain technical information from Cisco Systems.Cisco.comYou can access the most current Cisco documentation on the World Wide Web at this URL:http://www.cisco.com/univercd/home/home.htmYou can access the Cisco website at this URL:http://www.cisco.comInternational Cisco websites can be accessed from this URL:http://www.cisco.com/public/countries_languages.shtmlDocumentation CD-ROMCisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which may have shipped with your product. The Documentation CD-ROM is updated regularly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual or quarterly subscription.Registered Cisco.com users can order a single Documentation CD-ROM (product number DOC-CONDOCCD=) through the Cisco Ordering tool:http://www.cisco.com/en/US/partner/ordering/ordering_place_order_ordering_tool_launch.htmlAll users can order annual or quarterly subscriptions through the online Subscription Store:http://www.cisco.com/go/subscription

BETA DRAFT - CISCO CONFIDENTIALxviCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01PrefaceObtaining Technical AssistanceOrdering DocumentationYou can find instructions for ordering documentation at this URL:http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htmYou can order Cisco documentation in these ways:•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Networking Products MarketPlace:http://www.cisco.com/en/US/partner/ordering/index.shtml•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA.) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387). Documentation FeedbackYou can submit comments electronically on Cisco.com. On the Cisco Documentation home page, click Feedback at the top of the page.You can send your comments in e-mail to bug-doc@cisco.com.You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:Cisco SystemsAttn: Customer Document Ordering170 West Tasman DriveSan Jose, CA 95134-9883We appreciate your comments.Obtaining Technical AssistanceFor all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the Cisco Technical Assistance Center (TAC) provides 24-hour, award-winning technical support services, online and over the phone. Cisco.com features the Cisco TAC website as an online starting point for technical assistance.Cisco TAC WebsiteThe Cisco TAC website (http://www.cisco.com/tac) provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco TAC website is available 24 hours a day, 365 days a year.Accessing all the tools on the Cisco TAC website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a login ID or password, register at this URL:http://tools.cisco.com/RPF/register/register.do

BETA DRAFT - CISCO CONFIDENTIALxviiCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Preface Obtaining Additional Publications and InformationOpening a TAC CaseThe online TAC Case Open Tool (http://www.cisco.com/tac/caseopen) is the fastest way to open P3 and P4 cases. (Your network is minimally impaired or you require product information). After you describe your situation, the TAC Case Open Tool automatically recommends resources for an immediate solution. If your issue is not resolved using these recommendations, your case will be assigned to a Cisco TAC engineer.For P1 or P2 cases (your production network is down or severely degraded) or if you do not have Internet access, contact Cisco TAC by telephone. Cisco TAC engineers are assigned immediately to P1 and P2 cases to help keep your business operations running smoothly.To open a case by telephone, use one of the following numbers:Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227) EMEA: +32 2 704 55 55 USA: 1 800 553-2447 For a complete listing of Cisco TAC contacts, go to this URL:http://www.cisco.com/warp/public/687/Directory/DirTAC.shtmlTAC Case Priority DefinitionsTo ensure that all cases are reported in a standard format, Cisco has established case priority definitions.Priority 1 (P1)—Your network is “down” or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation. Priority 2 (P2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.Priority 3 (P3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.Priority 4 (P4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.Obtaining Additional Publications and InformationInformation about Cisco products, technologies, and network solutions is available from various online and printed sources.•The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as ordering and customer support services. Access the Cisco Product Catalog at this URL:http://www.cisco.com/en/US/products/products_catalog_links_launch.html•Cisco Press publishes a wide range of networking publications. Cisco suggests these titles for new and experienced users: Internetworking Terms and Acronyms Dictionary, Internetworking Technology Handbook, Internetworking Troubleshooting Guide, and the Internetworking Design Guide. For current Cisco Press titles and other information, go to Cisco Press online at this URL:http://www.ciscopress.com

BETA DRAFT - CISCO CONFIDENTIALxviiiCisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01PrefaceObtaining Additional Publications and Information•Packet magazine is the Cisco quarterly publication that provides the latest networking trends, technology breakthroughs, and Cisco products and solutions to help industry professionals get the most from their networking investment. Included are networking deployment and troubleshooting tips, configuration examples, customer case studies, tutorials and training, certification information, and links to numerous in-depth online resources. You can access Packet magazine at this URL:http://www.cisco.com/go/packet•iQ Magazine is the Cisco bimonthly publication that delivers the latest information about Internet business strategies for executives. You can access iQ Magazine at this URL:http://www.cisco.com/go/iqmagazine•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:http://www.cisco.com/en/US/about/ac123/ac147/about_cisco_the_internet_protocol_journal.html•Training—Cisco offers world-class networking training. Current offerings in network training are listed at this URL:http://www.cisco.com/en/US/learning/index.html

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL1-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-011Product OverviewThis chapter describes the Cisco Aironet CB21AG and PI21AG client adapters and illustrates their role in a wireless network.The following topics are covered in this chapter:•Introduction to the Client Adapters, page 1-2•Hardware Components, page 1-3•Software Components, page 1-4•Network Configurations Using Client Adapters, page 1-5

BETA DRAFT - CISCO CONFIDENTIAL1-2Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 1 Product OverviewIntroduction to the Client AdaptersIntroduction to the Client AdaptersThe Cisco Aironet IEEE 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) are radio modules that provide transparent wireless data communications between fixed, portable, or mobile devices and other wireless devices or a wired network infrastructure. The client adapters are fully compatible when used in devices supporting “plug-and-play” (PnP) technology.The primary function of the client adapters is to transfer data packets transparently through the wireless infrastructure by communicating with access points that are connected to a wired LAN. The adapters operate similarly to a standard network product except that the cable is replaced with a radio connection and an access point is required to make the connection to the wire. No special wireless networking functions are required, and all existing applications that operate over a network can operate using the adapters.This document covers the two client adapters described in Table 1-1.TerminologyThe following terms are used throughout this document:•client adapter—Refers to both types of adapters.•PC-Cardbus card or PCI card—Refers to a specific adapter.•workstation (or station)—Refers to a computing device with an installed client adapter.•infrastructure device—Refers to a device that connects client adapters to a wired LAN, such as an access point, bridge, or base station. Throughout this document, access point is used to represent infrastructure devices in general.Table 1-1 Client Adapter TypesClient Adapter Model Number Description IllustrationPC-Cardbus card AIR-CB21AG An IEEE 802.11a/b/g-compliant 2.4- and 5-GHz 54-Mbps client adapter card radio module with a Cardbus interface that can be inserted into any device equipped with an external 32-bit Cardbus slot. Host devices can include laptops and notebook computers.PCI card AIR-PI21AG An IEEE 802.11a/b/g-compliant 2.4- and 5-GHz 54-Mbps client adapter card radio module that can be inserted into any device equipped with an empty PCI expansion slot, such as a desktop personal computer.9557995580STATUSACTIVITY

BETA DRAFT - CISCO CONFIDENTIAL1-3Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 1 Product Overview Hardware ComponentsHardware ComponentsThe client adapters have three major hardware components: a radio, a radio antenna, and two LEDs.RadioThe client adapters contain a dual-band radio that is both IEEE 802.11a and 802.11b/g compliant. The radio uses both direct-sequence spread spectrum (DSSS) technology and orthogonal frequency division multiplexing (OFDM) technology for client applications in the 2.4-GHz Industrial Scientific Medical (ISM) frequency band and OFDM technology in the 5-GHz Unlicensed National Information Infrastructure (UNII) frequency bands. It can transmit data at up to 100 milliwatts (mW) in the 2.4-GHz band or up to 40 mW in the 5-GHz band over a half-duplex radio channel operating at up to 54 Mbps.The client adapters operate with other IEEE 802.11a or 802.11b/g-compliant client devices in ad hoc mode or with Cisco Aironet 340, 350, 1100, and 1200 Series Access Points and other IEEE 802.11a or 802.11b/g-compliant infrastructure devices in infrastructure mode. They are approved for indoor and outdoor use in the 2.4-GHz band and for indoor use only in the 5-GHz band except in the United States, which allows for outdoor use on channels 52 through 64.Radio AntennaThe type of antenna used depends on your client adapter:•PC-Cardbus cards have an integrated, permanently attached dual-band 2.4/5-GHz diversity antenna. The benefit of the diversity antenna system is improved coverage. The system works by allowing the card to switch and sample between its two antenna ports in order to select the optimum port for receiving data packets. As a result, the card has a better chance of maintaining the radio frequency (RF) connection in areas of interference. The antenna is housed within the section of the card that hangs out of the PC card slot when the card is installed.• PCI cards have a 1-dBi dual-band 2.4/5-GHz antenna that is permanently attached by cable. A base is provided with the antenna to enable it to be mounted to a wall or to sit upright on a desk or other horizontal surface.LEDsThe client adapters have two LEDs that glow or blink to indicate the status of the adapter or to convey error messages. Refer to Chapter 10 for an interpretation of the LED codes.

BETA DRAFT - CISCO CONFIDENTIAL1-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 1 Product OverviewSoftware ComponentsSoftware ComponentsThe client adapters have two major software components: a driver and client utilities. These components are installed together by running a single executable Install Wizard file that is available from Cisco.com. This file can be run on Windows 2000 or XP and can be used only with CB21AG and PI21AG client adapters.Note Chapter 3 provides instructions on using the Install Wizard to install these software components.DriverThe driver provides an interface between a computer’s operating system and the client adapter, thereby enabling the operating system and the applications it runs to communicate with the adapter. The driver must be installed before the adapter can be used.Client UtilitiesTwo client utilities are available for use with the client adapters: Aironet Desktop Utility (ADU) and Aironet System Tray Utility (ASTU). These utilities are optional applications that interact with the client adapter’s radio to adjust settings and display information.ADU enables you to create configuration profiles for your client adapter and perform user-level diagnostics. Because ADU performs a variety of functions, it is documented by function throughout this manual.ASTU, which is accessible from an icon in the Windows system tray, provides a small subset of the features available through ADU. Specifically, it enables you to access status information about your client adapter and perform basic tasks. Chapter 8 provides detailed information and instructions on using ASTU.Note If your computer is running Windows XP, you can configure your client adapter through the Windows operating system instead of through ADU. Refer to Appendix E for information. However, ADU is recommended for configuring the client adapter.

BETA DRAFT - CISCO CONFIDENTIAL1-5Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 1 Product Overview Network Configurations Using Client AdaptersNetwork Configurations Using Client AdaptersClient adapters can be used in a variety of network configurations. In some configurations, access points provide connections to your network or act as repeaters to increase wireless communication range. The maximum communication range is based on how you configure your wireless network.This section describes and illustrates the two most common network configurations:•Ad hoc wireless local area network (LAN)•Wireless infrastructure with workstations accessing a wired LANFor examples of more complex network configurations involving client adapters and access points, refer to the documentation for your access point.Note Refer to Chapter 5 for information on setting the client adapter’s network type.Ad Hoc Wireless LANAn ad hoc (or peer-to-peer) wireless LAN (see Figure 1-1) is the simplest wireless LAN configuration. In a wireless LAN using an ad hoc network configuration, all devices equipped with a client adapter can be linked together and communicate directly with each other. The use of an infrastructure device, such as an access point, is not required.Figure 1-1 Ad Hoc Wireless LAN47520

BETA DRAFT - CISCO CONFIDENTIAL1-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 1 Product OverviewNetwork Configurations Using Client AdaptersWireless Infrastructure with Workstations Accessing a Wired LANA microcellular network can be created by placing two or more access points on a LAN. Figure 1-2 shows a microcellular network with workstations accessing a wired LAN through several access points.This configuration is useful with portable or mobile stations because it allows them to be directly connected to the wired network even while moving from one microcell domain to another. This process is transparent, and the connection to the file server or host is maintained without disruption. The mobile station stays connected to an access point as long as it can. However, once the transfer of data packets needs to be retried or beacons are missed, the station automatically searches for and associates to another access point. This process is referred to as seamless roaming.Figure 1-2 Wireless Infrastructure with Workstations Accessing a Wired LANAccess Point(Root Unit)Access Point(Root Unit)5835Wired LAN

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL2-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-012Preparing for InstallationThis chapter provides information that you need to know before installing a client adapter.The following topics are covered in this chapter:•Safety information, page 2-2•Unpacking the Client Adapter, page 2-3•System Requirements, page 2-4•Site Requirements, page 2-5

BETA DRAFT - CISCO CONFIDENTIAL2-2Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 2 Preparing for InstallationSafety informationSafety informationFollow the guidelines in this section to ensure proper operation and safe use of the client adapter.FCC Safety Compliance StatementThe FCC, with its action in ET Docket 96-8, has adopted a safety standard for human exposure to RF electromagnetic energy emitted by FCC-certified equipment. When used with approved Cisco Aironet antennas, Cisco Aironet products meet the uncontrolled environmental limits found in OET-65 and ANSI C95.1, 1991. Proper operation of this radio device according to the instructions in this publication will result in user exposure substantially below the FCC recommended limits.Safety Guidelines•Do not touch or move the antenna while the unit is transmitting or receiving.•Do not hold any component containing a radio such that the antenna is very close to or touching any exposed parts of the body, especially the face or eyes, while transmitting.•Do not operate the radio or attempt to transmit data unless the antenna is connected; otherwise, the radio may be damaged.•High-gain, wall-mount, or mast-mount antennas are designed to be professionally installed and should be located at a minimum distance of 12 inches (30 cm) or more from the body of all persons. Please contact your professional installer, VAR, or antenna manufacturer for proper installation requirements.•Use in specific environments:–The use of wireless devices in hazardous locations is limited to the constraints posed by the safety directors of such environments.–The use of wireless devices on airplanes is governed by the Federal Aviation Administration (FAA).–The use of wireless devices in hospitals is restricted to the limits set forth by each hospital.

BETA DRAFT - CISCO CONFIDENTIAL2-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 2 Preparing for InstallationSystem RequirementsSystem RequirementsIn addition to the items shipped with the client adapter, you also need the following items in order to install and use the adapter:•One of the following computing devices running Windows 2000 or XP:–Laptop, notebook, or portable or handheld device equipped with a 32-bit Cardbus slot–Desktop personal computer equipped with an empty PCI expansion slotNote Cisco recommends a 300-MHz processor or greater.•Service Pack 1 for Windows XP (recommended)•20 MB of free hard disk space (minimum)•128 MB of RAM or greater (recommended)•The appropriate tools for removing your computer’s cover and expansion slot dust cover and for mounting the antenna base (for PCI cards)•The following information from your system administrator:–The logical name for your workstation (also referred to as client name)–The protocols necessary to bind to the client adapter–The case-sensitive service set identifier (SSID) for your RF network–If your computer is not connected to a DHCP server, the IP address, subnet mask, and default gateway address of your computer–The wired equivalent privacy (WEP) keys of the access points with which your client adapter will communicate, if your wireless network uses static WEP for security–The username and password for your network account

BETA DRAFT - CISCO CONFIDENTIAL2-5Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 2 Preparing for Installation Site RequirementsSite RequirementsThis section discusses the site requirements for both infrastructure and client devices.For Infrastructure DevicesBecause of differences in component configuration, placement, and physical environment, every network application is a unique installation. Therefore, before you install any wireless infrastructure devices (such as access points, bridges, and base stations, which connect your client adapters to a wired LAN), a site survey must be performed to determine the optimum placement of these devices to maximize range, coverage, and network performance.Note Infrastructure devices are installed and initially configured prior to client devices.For Client DevicesBecause the client adapter is a radio device, it is susceptible to RF obstructions and common sources of interference that can reduce throughput and range. Follow these guidelines to ensure the best possible performance:•Install the client adapter in an area where large steel structures such as shelving units, bookcases, and filing cabinets will not obstruct radio signals to and from the client adapter.•Install the client adapter away from microwave ovens. Microwave ovens operate on the same frequency as the client adapter and can cause signal interference.

BETA DRAFT - CISCO CONFIDENTIAL2-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 2 Preparing for InstallationSite Requirements

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL3-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-013Installing the Client AdapterThis chapter provides instructions for installing the client adapter.The following topics are covered in this chapter:•Inserting a Client Adapter, page 3-2•Installing the Client Adapter Software, page 3-8•Verifying Installation, page 3-18

BETA DRAFT - CISCO CONFIDENTIAL3-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInserting a Client AdapterInserting the CardFollow the steps below to insert a PCI card into your PC.Step 1 Turn off the PC and all its components.Step 2 Remove the computer cover.Note On most Pentium PCs, PCI expansion slots are white. Refer to your PC documentation for slot identification.Step 3 Remove the screw from the top of the CPU back panel above an empty PCI expansion slot. This screw holds the metal bracket on the back panel.Caution Static electricity can damage your PCI card. Before removing the card from the anti-static packaging, discharge static by touching a metal part of a grounded PC.Step 4 Locate an empty PCI expansion slot inside your computer.Step 5 Slip your card’s antenna through the opening near the empty expansion slot so that it is located outside of the computer. See Figure 3-3.Figure 3-3 Inserting a PCI Card into a PCStep 6 Tilt the card to allow the LEDs to slip through the opening in the CPU back panel. See the enlarged view in Figure 3-3.STATUSACTIVITY95582STATUSACTIVITY2131Antenna cable2LEDs3Card edge connector

BETA DRAFT - CISCO CONFIDENTIAL3-5Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Inserting a Client AdapterStep 7 Press the card into the empty slot until its connector is firmly seated.Caution Do not force the card into the expansion slot as this could damage both the card and the slot. If the card does not insert easily, remove it and reinsert it.Step 8 Reinstall the screw on the CPU back panel and replace the computer cover.Assembling the AntennaFollow the steps below to assemble the PCI card’s antenna.Step 1 Slide the antenna through the opening in the bottom of the antenna base.Step 2 Position the antenna so its notches are facing the Cisco label on the front of the base. See Figure 3-4.Figure 3-4 Inserting the Antenna into Its Base955842131Antenna2Notch3Antenna base

BETA DRAFT - CISCO CONFIDENTIAL3-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInserting a Client AdapterStep 3 Press the antenna cable into the receptacle on the top of the base as shown in Figure 3-4.Step 4 Press the antenna straight down into the receptacle until it clicks into place.Mounting the AntennaBecause the PCI card is a radio device, it is susceptible to RF obstructions and common sources of interference that can reduce throughput and range. Follow these guidelines to ensure the best possible performance:•Install the PCI card’s antenna in an area where large steel structures such as shelving units, bookcases, and filing cabinets will not obstruct radio signals being transmitted or received.•Install the antenna away from microwave ovens and 2.4-GHz cordless phones. These products can cause signal interference because they operate in the same frequency range as the PCI card when used in 2.4-GHz mode.Follow the steps below to position the PCI card’s antenna on a flat horizontal surface or to mount it to a wall.Step 1 Perform one of the following:•If you want to use the antenna on a flat horizontal surface, position the antenna so it is pointing straight up. Then go to Step 7.•If you want to mount the antenna to a wall, go to Step 2.Step 2 Drill two holes in the wall that are 1.09 inches apart. Figure 3-5 shows the distance between the mounting holes on the bottom of the antenna base.Figure 3-5 Bottom of Antenna Base955971.09 inches

BETA DRAFT - CISCO CONFIDENTIAL3-7Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Inserting a Client AdapterStep 3 Tap the two supplied wall anchors into the holes.Step 4 Drive the two supplied screws into the wall anchors, leaving a small gap between the screw head and the anchor.Step 5 Position the mounting holes on the bottom of the antenna base over the screws (see Figure 3-6) and pull down to lock in place.Figure 3-6 Mounting the AntennaStep 6 The antenna rotates 90 degrees from its base. For optimal reception, position the antenna so it is pointing straight up (see Figure 3-7).Figure 3-7 Rotating the Antenna9559595596

BETA DRAFT - CISCO CONFIDENTIAL3-8Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInstalling the Client Adapter SoftwareStep 7 Boot up your PC.Step 8 When the Found New Hardware Wizard screen appears, click Cancel.Step 9 Go to the “Installing the Client Adapter Software” section below.Installing the Client Adapter SoftwareThis section enables you to install Cisco Aironet CB21AG or PI21AG client adapter drivers and utilities from a single executable file named Win-Client-802.11a-b-g-Ins-Wizard-vx.exe, where x represents the version number. Follow the steps below to install these client adapter software components on a computer running Windows 2000 or XP.Caution Cisco Aironet CB21AG and PI21AG client adapter software is incompatible with other Cisco Aironet client adapter software. Remove or disable any installed Cisco Aironet client adapters before you install or use a CB21AG or PI21AG adapter and do not open the Aironet Client Utility (ACU). Refer to the “Disabling a Cisco Aironet Client Adapter” section on page 10-7 for instructions on disabling a client adapter.Caution Do not eject your client adapter at any time during the installation process, including during the reboot.Note This procedure is meant to be used the first time the Cisco Aironet CB21AG or PI21AG client adapter software is installed on your computer. If this software is already installed on your computer, follow the instructions in Chapter 9 to upgrade or uninstall the client adapter software.Note Only one client adapter can be installed and used at a time. The software does not support the use of multiple cards.Step 1 Use your computer’s web browser to access the following URL:http://www.cisco.com/public/sw-center/sw-wireless.shtmlStep 2 Select Option #2: Aironet Wireless Software Display Tables.Note You can download software from the Software Selector tool instead of the display tables. To do so, select Option #1: Aironet Wireless Software Selector, follow the instructions on the screen, and go to Step 6.Step 3 Select Cisco Aironet Wireless LAN Client Adapters.Step 4 Under Aironet Client Adapter Installation Wizard (For Windows), select 802.11a/b/g (CB21AG, PI21AG).Step 5 Select the Install Wizard file with the greatest version number.Step 6 Read and accept the terms and conditions of the Software License Agreement.

BETA DRAFT - CISCO CONFIDENTIAL3-9Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Installing the Client Adapter SoftwareStep 7 Select the file again to download it.Step 8 Save the file to your computer’s hard drive.Step 9 Use Windows Explorer to find the file.Step 10 Double-click the file. The “Starting InstallShield Wizard” message appears followed by the Preparing Setup screen (see Figure 3-8) and the Cisco Aironet Installation Program screen (see Figure 3-9).Figure 3-8 Preparing Setup Screen

BETA DRAFT - CISCO CONFIDENTIAL3-10Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInstalling the Client Adapter SoftwareFigure 3-9 Cisco Aironet Installation Program ScreenStep 11 Click Next. The Setup Type screen appears (see Figure 3-10).

BETA DRAFT - CISCO CONFIDENTIAL3-11Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Installing the Client Adapter SoftwareFigure 3-10 Setup Type ScreenStep 12 Select one of the following options:Note To ensure compatibility among software components, Cisco recommends that you install the client utilities and driver.•Install Client Utilities and Driver (recommended)—Installs the client adapter driver and client utilities.•Install Driver Only—Installs only the client adapter driver. If you select this option, go to Step 24.•Make Driver Installation Diskette(s)—Enables you to create driver installation diskettes. Step 13 Click Next.Step 14 If a message appears indicating that you are required to restart your computer at the end of the installation process, click Yes.Note If you click No, you are asked to confirm your decision. If you proceed, the installation process terminates.The Choose Destination Location screen appears (see Figure 3-11).

$BETA DRAFT - CISCO CONFIDENTIAL3-12Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInstalling the Client Adapter SoftwareFigure 3-11 Choose Destination Location ScreenStep 15 Perform one of the following:•If you selected the first option in Step 12, click Next to install the client utility files in the C:\Program Files\Cisco Aironet directory.Note If you want to install the client utilities in a different directory, click Browse, select a different directory, click OK, and click Next.•If you selected the Make Driver Installation Diskette(s) option in Step 12, insert a floppy disk into your computer and click Next to copy the driver to the diskette. Go to Step 24.Note If you want to copy the driver to a different drive or directory, click Browse, select a new location, click OK, and click Next.Step 16 The Select Program Folder screen appears (see Figure 3-12).$

BETA DRAFT - CISCO CONFIDENTIAL3-13Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Installing the Client Adapter SoftwareFigure 3-12 Select Program Folder ScreenStep 17 Click Next to add program icons to the Cisco Aironet program folder.Note If you want to specify a different program folder, select a folder from the Existing Folders list or type a new folder name in the Program Folder field and click Next.Step 18 If your computer is running Windows 2000, go to Step 24. If your computer is running Windows XP, the IMPORTANT: Please Read! screen appears (see Figure 3-13).

BETA DRAFT - CISCO CONFIDENTIAL3-14Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInstalling the Client Adapter SoftwareFigure 3-13 IMPORTANT: Please Read! ScreenStep 19 Read the information displayed and click Next. The Choose Configuration Tool screen appears (see Figure 3-14).

BETA DRAFT - CISCO CONFIDENTIAL3-15Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Installing the Client Adapter SoftwareFigure 3-14 Choose Configuration Tool ScreenStep 20 Select one of the following options:•Cisco Aironet Desktop Utility (ADU)—Enables you to configure your client adapter using ADU.•Microsoft Wireless Configuration Manager—Enables you to configure your client adapter using the Microsoft Wireless Configuration Manager in Windows XP.To help you with your decision, Table 3-1 compares the Windows XP and ADU client adapter features.Table 3-1 Comparison of Windows XP and ADU Client Adapter FeaturesFeature Windows XP ADUConfiguration parameters Limited ExtensiveCapabilitiesCreate profiles No YesTurn radio on or off No YesSecurityStatic WEP Yes YesLEAP authentication with dynamic WEP No YesEAP-TLS or PEAP authentication Yes Yes

BETA DRAFT - CISCO CONFIDENTIAL3-16Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterInstalling the Client Adapter SoftwareNote If you select Cisco Aironet Desktop Utility (ADU), the Microsoft Wireless Configuration Manager is disabled. If you ever manually enable it, you are prompted to disable it whenever ADU is activated.Step 21 Click Next.Step 22 If you selected Cisco Aironet Desktop Utility (ADU) in Step 20, go to Step 24. If you selected Microsoft Wireless Configuration Manager, the Enable Tray Icon screen appears (see Figure 3-15).Figure 3-15 Enable Tray Icon ScreenStep 23 Check the Enable Cisco Aironet System Tray Utility (ASTU) check box if you want to be able to use ASTU even though you have chosen to configure your client adapter through Windows instead of ADU.Step 24 When prompted to insert your client adapter, click OK. The Setup Status screen appears (see Figure 3-16).Diagnostics Status screen Limited ExtensiveStatistics screen (transmit & receive) No YesTable 3-1 Comparison of Windows XP and ADU Client Adapter Features (continued)Feature Windows XP ADU

BETA DRAFT - CISCO CONFIDENTIAL3-17Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 3 Installing the Client Adapter Installing the Client Adapter SoftwareFigure 3-16 Setup Status ScreenThe installation process begins, and you are notified as each software component is installed.Note This process may take several minutes.Step 25 When a message appears indicating that your computer needs to be rebooted, click OK and allow your computer to restart.Note This process may take several minutes.Step 26 After your computer reboots, the Windows Found New Hardware Wizard appears. Click Next, allow the wizard to install the software for the client adapter, and click Finish.

BETA DRAFT - CISCO CONFIDENTIAL3-18Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 3 Installing the Client AdapterVerifying InstallationStep 27 If your computer is not connected to a DHCP server and you plan to use TCP/IP, follow the steps below for your operating system.•Windows 2000—Double-click My Computer, Control Panel, and Network and Dial-up Connections. Right-click Local Area Connection x (where x represents the number of the connection). Click Properties. In the Components Checked Are Used by This Connection field, select Internet Protocol (TCP/IP) and click Properties. Click Use the following IP address and enter the IP address, subnet mask, and default gateway address of your computer (which can be obtained from your system administrator). Click OK twice.•Windows XP—Double-click My Computer, Control Panel, and Network Connections. Right-click Wireless Network Connection x (where x represents the number of the connection). Click Properties. In the This Connection Uses the Following Items field, select Internet Protocol (TCP/IP) and click Properties. Select Use the following IP address and enter the IP address, subnet mask, and default gateway address of your computer (which can be obtained from your system administrator). Click OK twice.Step 28 If you are prompted to restart your computer, click Yes.Step 29 Go to the “Verifying Installation” section below to determine if the installation was successful.Verifying InstallationTo verify that you have properly installed the client adapter software, check the client adapter’s LEDs. If the installation was successful, the client adapter’s green LED blinks.Note If your installation was unsuccessful or you experienced problems during or after installation, refer to Chapter 10 for troubleshooting information.Now that your client adapter is properly installed, it is ready to be configured.•If you are planning to configure your client adapter through ADU, go to Chapter 4 to create configuration profiles.•If you are planning to configure your client adapter through Windows XP’s Wireless Configuration Manager, go to Appendix E.

$BETA DRAFT - CISCO CONFIDENTIAL4-11Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 4 Using the Profile Manager Importing and Exporting ProfilesExporting a ProfileStep 1 Insert a blank floppy disk into your computer’s floppy drive, if you wish to export a profile to a floppy disk.Step 2 Open ADU and click the Profile Management tab. The Cisco Aironet Desktop Utility (Profile Management) screen appears (see Figure 4-1).Step 3 In the profiles list, select the profile that you want to export.Step 4 Click Export. The Export Profile screen appears (see Figure 4-6).Figure 4-6 Export Profile ScreenThe profile name appears in the File name box.Step 5 Select a directory (for example, your computer’s floppy disk drive or a location on the network) from the Save in drop-down box.Note The default location is the Profiles folder in the directory where ADU is installed (for example, C:\Program Files\Cisco Aironet\Profiles).Step 6 Click Save. The profile is exported to the specified location.Step 7 Follow the instructions in the “Importing a Profile” section to import the profile on another computer.$

BETA DRAFT - CISCO CONFIDENTIAL5-14Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 5 Configuring the Client AdapterSetting Security ParametersWhen you enable Network-EAP or Require EAP on your access point and configure your client adapter for LEAP, EAP-TLS, or PEAP, authentication to the network occurs in the following sequence:1. The client associates to an access point and begins the authentication process.Note The client does not gain full access to the network until authentication between the client and the RADIUS server is successful.2. Communicating through the access point, the client and RADIUS server complete the authentication process, with the password (LEAP and PEAP) or certificate (EAP-TLS) being the shared secret for authentication. The password or internal key is never transmitted during the process.3. If authentication is successful, the client and RADIUS server derive a dynamic, session-based WEP key that is unique to the client.4. The RADIUS server transmits the key to the access point using a secure channel on the wired LAN.5. For the length of a session, or time period, the access point and the client use this key to encrypt or decrypt all unicast packets (and broadcast packets if the access point is set up to do so) that travel between them.Refer to the “Enabling LEAP” section on page 5-23 for instructions on enabling LEAP or to the “Enabling EAP-TLS or PEAP” section on page 5-26 for instructions on enabling EAP-TLS or PEAP.Note Refer to the IEEE 802.11 Standard for more information on 802.1X authentication and to the following URL for additional information on RADIUS servers: http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/secur_c/scprt2/scrad.htmWi-Fi Protected Access (WPA)Wi-Fi Protected Access (WPA) is a standards-based, interoperable security enhancement that strongly increases the level of data protection and access control for existing and future wireless LAN systems. It is derived from and is forward-compatible with the upcoming IEEE 802.11i standard. WPA leverages Temporal Key Integrity Protocol (TKIP) for data protection and 802.1X for authenticated key management.WPA supports two mutually exclusive key management types: WPA and WPA passphrase (or WPA Pre-shared Key). Using WPA key management, clients and the authentication server authenticate to each other using an EAP authentication method, and the client and server generate a pairwise master key (PMK). Using WPA, the server generates the PMK dynamically and passes it to the access point. Using WPA passphrase, however, you configure a passphrase (or pre-shared key) on both the client and the access point, and that passphrase is used as the PMK.Refer to the “Using a WPA Passphrase” section on page 5-22 for instructions on using a WPA passphrase, the “Enabling LEAP” section on page 5-35 for instructions on enabling LEAP with WPA, or the “Enabling Host-Based EAP” section on page 5-39 for instructions on enabling EAP-TLS, PEAP (EAP-GTC), or PEAP (EAP-MSCHAP V2) with WPA.Note WPA must also be enabled on the access point. Access points must use IOS release 12.2(11)JA or greater to enable WPA. Refer to the documentation for your access point for instructions on enabling this feature.

BETA DRAFT - CISCO CONFIDENTIAL5-16Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 5 Configuring the Client AdapterSetting Security ParametersAdditional WEP Key Security FeaturesThe three security features discussed in this section (MIC, TKIP, and broadcast key rotation) are designed to prevent sophisticated attacks on your wireless network’s WEP keys. These features do not need to be enabled on the client adapter; they are supported automatically in the client adapter software. However, they must be enabled on the access point.Note Access point firmware version 11.10T or greater is required to enable these security features. Refer to the software configuration guide for your access point for instructions on enabling these security features.Message Integrity Check (MIC)MIC prevents bit-flip attacks on encrypted packets. During a bit-flip attack, an intruder intercepts an encrypted message, alters it slightly, and retransmits it, and the receiver accepts the retransmitted message as legitimate. The MIC adds a few bytes to each packet to make the packets tamper-proof.The Advanced Status screen indicates if MIC is being used, and the Advanced Statistics screen provides MIC statistics.Temporal Key Integrity Protocol (TKIP)This feature, also referred to as WEP key hashing, defends against an attack on WEP in which the intruder uses the initialization vector (IV) in encrypted packets to calculate the WEP key. TKIP removes the predictability that an intruder relies on to determine the WEP key by exploiting IVs. It protects both unicast and broadcast WEP keys.Broadcast Key RotationEAP authentication provides dynamic unicast WEP keys for client devices but uses static broadcast, or multicast, keys. When you enable broadcast WEP key rotation, the access point provides a dynamic broadcast WEP key and changes it at the interval you select. When you enable this feature, only wireless client devices using LEAP, EAP-TLS, or PEAP authentication can associate to the access point. Client devices using static WEP (with open or shared key authentication) cannot associate.

BETA DRAFT - CISCO CONFIDENTIAL5-17Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 5 Configuring the Client Adapter Setting Security ParametersSynchronizing Security FeaturesIn order to use any of the security features discussed in this section, both your client adapter and the access point to which it will associate must be set appropriately. Table 5-4 indicates the client and access point settings required for each security feature. This chapter provides specific instructions for enabling the security features on your client adapter. Refer to the documentation for your access point for instructions on enabling any of these features on the access point.Table 5-4 Client and Access Point Security SettingsSecurity Feature Client Setting Access Point SettingStatic WEP with open authentication Select Pre-Shared Key (Static WEP) and create a WEP key Set up and enable WEP and enable Open Authentication for the SSIDStatic WEP with shared key authentication Select Pre-Shared Key (Static WEP) and create a WEP key Set up and enable WEP and enable Shared Key Authentication for the SSIDWPA Passphrase(or WPA Pre-shared Key) Select WPA Passphrase and enter the passphrase Select a cipher suite, enable Open Authentication and WPA for the SSID, and enter a WPA Pre-Shared KeyLEAP authentication Select 802.1x and LEAP; then set LEAP settings Set up and enable WEP and enable Network-EAP for the SSIDLEAP authentication with WPA Select WPA and LEAP; then set LEAP settings Select a cipher suite that includes TKIP, set up and enable WEP, and enable Network-EAP and WPA for the SSIDNote To allow both WPA and non-WPA clients to use the SSID, enable optional WPA.EAP-TLS authenticationIf using ACU to configure card Select 802.1x and EAP-TLS; then set EAP-TLS settings Set up and enable WEP and enable Open Authentication for the SSID and specify the use of EAPIf using Windows XP to configure card Select Enable network access control using IEEE 802.1X and Smart Card or other Certificate as the EAP TypeSet up and enable WEP and enable Open Authentication for the SSID and specify the use of EAP

BETA DRAFT - CISCO CONFIDENTIAL5-18Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 5 Configuring the Client AdapterSetting Security ParametersEAP-TLS authentication with WPAIf using ACU to configure card Select WPA and EAP-TLS; then set EAP-TLS settings Select a cipher suite that includes TKIP; set up and enable WEP; and enable WPA and Open Authentication for the SSID and specify the use of EAPNote To allow both WPA and non-WPA clients to use the SSID, enable optional WPA.If using Windows XP to configure card Enable WPA and select Enable network access control using IEEE 802.1X and Smart Card or other Certificate as the EAP TypeSelect a cipher suite that includes TKIP; set up and enable WEP; and enable WPA and Open Authentication for the SSID and specify the use of EAPNote To allow both WPA and non-WPA clients to use the SSID, enable optional WPA.PEAP authenticationIf using ACU to configure card Select 802.1x and PEAP (EAP-GTC) or PEAP (EAP-MSCHAP V2); then set PEAP settings Set up and enable WEP and enable Open Authentication for the SSID and specify the use of EAPIf using Windows XP to configure card Select Enable network access control using IEEE 802.1X and PEAP as the EAP TypeSet up and enable WEP and enable Open Authentication for the SSID and specify the use of EAPTable 5-4 Client and Access Point Security Settings (continued)Security Feature Client Setting Access Point Setting

BETA DRAFT - CISCO CONFIDENTIAL5-19Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 5 Configuring the Client Adapter Setting Security ParametersPEAP authentication with WPAIf using ACU to configure card Select WPA and PEAP (EAP-GTC) or PEAP (EAP-MSCHAP V2); then set PEAP settingsSelect a cipher suite that includes TKIP; set up and enable WEP; and enable WPA and Open Authentication for the SSID and specify the use of EAPNote To allow both WPA and non-WPA clients to use the SSID, enable optional WPA.If using Windows XP to configure card Enable WPA and select Enable network access control using IEEE 802.1X and PEAP as the EAP TypeSelect a cipher suite that includes TKIP; set up and enable WEP; and enable WPA and Open Authentication for the SSID and specify the use of EAPNote To allow both WPA and non-WPA clients to use the SSID, enable optional WPA.Fast roaming (CCKM) Enable LEAP and WPA Use firmware version 12.2(11)JA or greater, select a cipher suite that is compatible with CCKM, and enable Network-EAP and CCKM for the SSIDNote To allow both 802.1X clients and non-802.1X clients to use the SSID, enable optional CCKM.Reporting access points that fail LEAP authenticationNo settings required; automatically enabled No settings required; automatically enabled in the following firmware versions: 12.00T or greater (340, 350, and 1200 series access points) or IOS release 12.2(4)JA or greater (1100 series access points)MIC No settings required; automatically enabled Set up and enable WEP with full encryption, set MIC to MMH or select Enable MIC check box, and set Use Aironet Extensions to YesTKIP No settings required; automatically enabled Set up and enable WEP, set TKIP to Cisco or select Enable Per Packet Keying check box, and set Use Aironet Extensions to YesBroadcast key rotation Enable LEAP, EAP-TLS, or PEAP Set up and enable WEP and set Broadcast WEP Key Rotation Interval to any value other than zero (0)Table 5-4 Client and Access Point Security Settings (continued)Security Feature Client Setting Access Point Setting

BETA DRAFT - CISCO CONFIDENTIAL5-24Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 5 Configuring the Client AdapterSetting Security ParametersFigure 5-7 LEAP Settings ScreenStep 3 Select one of the following LEAP username and password setting options:•Use Temporary User Name and Password—Requires you to enter the LEAP username and password each time the computer reboots in order to authenticate and gain access to the network.•Use Saved User Name and Password—Does not require you to enter a LEAP username and password each time the computer reboots. Authentication occurs automatically as needed using a saved username and password (which are registered with the RADIUS server).

BETA DRAFT - CISCO CONFIDENTIAL5-30Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 5 Configuring the Client AdapterSetting Security ParametersFigure 5-11 Define PEAP (EAP-GTC) Configuration ScreenStep 3 Select the certificate authority from which the server certificate was downloaded in the Network Certificate Authority drop-down list.Step 4 Perform one of the following:•If you want your Windows username to also serve as your PEAP username, check the Use Windows User Name check box.This option gives you only one username to remember. After you log in, the PEAP authentication process begins automatically.•If you want to enter a separate PEAP username (which is registered with the RADIUS server) in addition to your regular Windows username in order to start the PEAP authentication process, enter your PEAP username in the User Name field.Step 5 Select either Token or Static Password, depending on your user database.Step 6 Click Advanced. The Advanced Configuration screen appears (see Figure 5-12).

BETA DRAFT - CISCO CONFIDENTIAL5-32Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 5 Configuring the Client AdapterSetting Security Parameters

ALPHA DRAFT - CISCO CONFIDENTIAL6-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 6 Using EAP AuthenticationUsing LEAP with a Manually Prompted LoginFigure 6-3 Action Drop-Down MenuWhen the LEAP login screen appears (see Figure 6-2), enter your LEAP username and password and click OK. The domain name is optional.Step 2 The LEAP Authentication Status screen appears. If your client adapter authenticates, the screen shows that each stage was successful and then disappears. ASTU now shows Authenticated, and the Server Based Authentication field on the ADU Current Status screen shows LEAP.If the authentication attempt fails, an error message appears after the LEAP timeout period has expired. Refer to the “Error Messages” section on page 10-11 for the necessary action to take.After a Reboot, Logon, or Card InsertionAfter your computer reboots, you log on, or you eject and reinsert the client adapter, the adapter does not automatically attempt to authenticate. You must manually invoke the authentication process. To do so, follow the steps below.Step 1 If you rebooted your computer or logged on, complete your standard Windows login.Step 2 Open ASTU or ADU.Step 3 Select the Manual LEAP Login option.Step 4 When the LEAP login screen appears (see Figure 6-4), enter your LEAP username and password and click OK. The domain name is optional.

ALPHA DRAFT - CISCO CONFIDENTIAL6-11Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 6 Using EAP Authentication Using PEAPFigure 6-5 Static Password ScreenStep 5 Enter your PEAP authentication username and password (which are registered with the RADIUS server).Step 6 If applicable, select your domain name from the drop-down list or type it in.Step 7 Click OK. The PEAP Authentication Status screen appears. If your client adapter authenticates, the screen shows that each stage was successful and then disappears. ASTU now shows Authenticated, and the Server Based Authentication field on the ADU Current Status screen shows PEAP.If the authentication attempt fails, an error message appears. Refer to the “Error Messages” section on page 10-11 for the necessary action to take.Step 8 If you also have a locally cached Windows password, you must change it manually in Windows to synchronize your passwords. To do so, press Ctrl-Alt-Delete, select Change Password, and enter your old password once and your new password twice.OTP Databases OnlyStep 1 If your computer is running Windows XP, a pop-up message appears above the Windows system tray informing you that you need to select a certificate or other credentials to access the network. Click this message.Step 2 If a message appears indicating the root certification authority for the server’s certificate and it is the correct certification authority, click OK to accept the connection. Otherwise, click Cancel.Step 3 If a message appears indicating the server to which your client adapter is connected and it is the correct server to connect to, click OK to accept the connection. Otherwise, click Cancel.Step 4 Perform one of the following:•If your computer is running Windows 2000, the One Time Password screen appears (see Figure 6-6).•If your computer is running Windows XP, a pop-up message appears above the Windows system tray prompting you to process your logon information for your wireless network. Click this message. The One Time Password screen appears (see Figure 6-6).

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL7-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-017Performing DiagnosticsThis chapter explains how to use ADU to perform user-level diagnostics.The following topics are covered in this chapter:•Overview of ADU Diagnostic Tools, page 7-2•Setting Parameters that Affect ADU Diagnostic Tools, page 7-2•Viewing the Current Status of Your Client Adapter, page 7-4•Viewing Statistics for Your Client Adapter, page 7-10

BETA DRAFT - CISCO CONFIDENTIAL7-2Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsOverview of ADU Diagnostic ToolsOverview of ADU Diagnostic ToolsIn addition to enabling you to configure your client adapter for use in various types of networks, ADU provides tools that enable you to assess the performance of the client adapter and other devices on the wireless network. ADU diagnostic tools perform the following functions:•Display your client adapter’s current status and configured settings•Display statistics pertaining to your client adapter’s transmission and reception of dataTable 7-1 enables you to quickly locate instructions for using ADU diagnostic tools.Setting Parameters that Affect ADU Diagnostic ToolsSeveral parameters affect the operation of ADU diagnostic tools. Follow the steps below to set these parameters.Step 1 Open ADU.Step 2 Select Display Settings from the Options drop-down menu. The Display Settings screen appears (see Figure 7-1).Figure 7-1 Display Settings ScreenTable 7-1 Locating Diagnostic InstructionsDiagnostic Tool Page NumberStatus page 7-4Statistics page 7-10

BETA DRAFT - CISCO CONFIDENTIAL7-3Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 7 Performing Diagnostics Setting Parameters that Affect ADU Diagnostic ToolsStep 3 Table 7-2 lists and describes the parameters that affect the operation of ADU diagnostic tools. Follow the instructions in the table to change any parameters.Step 4 Click OK to save your changes.Table 7-2 Parameters Affecting ADU Diagnostic ToolsParameter DescriptionSignal Strength Display Units Specifies the units used to display signal strength on the status screens.Default: dBUnits Description% Displays the signal strength as a percentage.dB Displays the signal strength in decibels.Refresh Interval Specifies how often the status and statistics screens and the ASTU icon are updated.Range: 1 to 5 seconds between updates (in 1-second increments)Default: 5 seconds between updatesData Display Specifies whether the data that is displayed on the statistics screens continue to increment until the driver is reloaded or only until an update occurs (every 1 to 5 seconds).Options: Relative or CumulativeDefault: CumulativeData Display DescriptionRelative Displays statistical data collected since the last update, as specified by the Refresh Interval (1 to 5 seconds).Cumulative Displays statistical data collected since the driver was loaded, upon card insertion or reboot.

BETA DRAFT - CISCO CONFIDENTIAL7-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsViewing the Current Status of Your Client AdapterViewing the Current Status of Your Client AdapterADU enables you to view the current status of your client adapter as well as many of the settings that have been configured for the adapter. To view your client adapter’s status and settings, open ADU. The Current Status screen appears (see Figure 7-2). Figure 7-2 Current Status ScreenTable 7-3 interprets each element of the Current Status screen.

BETA DRAFT - CISCO CONFIDENTIAL7-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsViewing the Current Status of Your Client AdapterClick Advanced if you want to view more detailed status information for your client adapter. The Advanced Status screen appears (see Figure 7-3). Figure 7-3 Advanced Status ScreenTable 7-4 interprets each element of the Advanced Status screen.Wireless Mode The frequency and rate at which your client adapter is transmitting or receiving packets to or from access pointsValue: 5 GHz 54 Mbps, 2.4 GHz 11 Mbps, or 2.4 GHz 54 MbpsNote Refer to the Wireless Mode parameter in Table 5-3 for information on selecting the wireless mode for your client adapter.IP Address The IP address of your client adapter.Signal Strength The signal strength for all received packets. The color of this parameter’s progress bar provides a visual interpretation of signal strength.Value: Excellent (green), Good (green), Fair (orange), Poor (yellow), or No LinkTable 7-3 Basic Client Adapter Status (continued)Status Description

BETA DRAFT - CISCO CONFIDENTIAL7-7Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 7 Performing Diagnostics Viewing the Current Status of Your Client AdapterTable 7-4 Advanced Client Adapter StatusStatus DescriptionNetwork Name (SSID) The name of the network to which your client adapter is currently associated. Note Refer to the SSID1 parameter in Table 5-2 for information on setting the client adapter’s SSID.Data Encryption The data encryption type that was negotiated with the access point upon association.Value: None, WEP, CKIP, or TKIPAuthentication Type The EAP authentication type that your client adapter is currently using.Value: TBDNote Refer to the “Setting Security Parameters” section on page 5-10 for information on setting the authentication type.Associated AP Name The name of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode, the access point was configured with a name, and Aironet Extensions are enabled (on access points running Cisco IOS release 12.2(4)JA or greater).Associated AP IP Address The IP address of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode, the access point was configured with an IP address, and Aironet Extensions are enabled (on access points running Cisco IOS release 12.2(4)JA or greater).Note If Aironet Extensions are disabled, the IP address of the associated access point is shown as 0.0.0.0.Associated AP MAC Address The MAC address of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode.Note This field displays the MAC address of the access point’s Ethernet port (for access points that do not run Cisco IOS) or the MAC address of the access point’s radio (for access points that run Cisco IOS). The MAC address of the Ethernet port on access points that run Cisco IOS is printed on a label on the back of the device.Power Save Mode The client adapter’s current power consumption setting.Value: CAM (Constantly Awake Mode), Max PSP (Max Power Saving), or Fast PSP (Power Save Mode)Note Refer to the Power Save Mode parameter in Table 5-3 for information on setting the client adapter’s power save mode.

BETA DRAFT - CISCO CONFIDENTIAL7-8Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsViewing the Current Status of Your Client AdapterCurrent Power Level The power level at which your client adapter is currently transmitting. The maximum level is dependent upon the radio band used and your country’s regulatory agency.Value: 10, 20, 32, 50, 63, or 100 mW (802.11b/g band);10, 13, 20, 25, or 40 mW (802.11a band)Note Refer to the Transmit Power Level parameter in Table 5-3 for information on setting the client adapter’s power level.Available Power Levels The power levels at which your client adapter is capable of transmitting. The maximum level is dependent upon the radio band used and your country’s regulatory agency.Value: 10, 20, 32, 50, 63, or 100 mW (802.11b/g band);10, 13, 20, 25, or 40 mW (802.11a band)Note Refer to the Transmit Power Level parameter in Table 5-3 for information on the client adapter’s available power levels.Current Signal Strength The signal strength for all received packets. The higher the value, the stronger the signal.Range: 0 to 100%Current Signal Quality The signal quality for all received packets. The higher the value, the clearer the signal.Range: 0 to 100%Note This setting appears only if you selected signal strength to be displayed as a percentage. See the Signal Strength Display Units parameter in Table 7-2 for information.Up Time The amount of time (in hours:minutes:seconds) since the client adapter was last reset. If the adapter has been running for more than 24 hours, the time is displayed in days, hours:minutes:seconds.802.11b Preamble Indicates whether your client adapter is using only long radio headers or short and long radio headers.Value: Short & Long or Long OnlyNote This field contains a value only when the client adapter is operated in 2.4-GHz 11-Mbps or 2.4-GHz 54-Mbps mode.Note Refer to the 802.11b Preamble parameter in Table 5-3 for information on using radio headers.Table 7-4 Advanced Client Adapter Status (continued)Status Description

BETA DRAFT - CISCO CONFIDENTIAL7-9Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 7 Performing Diagnostics Viewing the Current Status of Your Client AdapterClick OK to close the Advanced Status screen.Message Integrity Check Indicates whether your client adapter is using message integrity check (MIC) to protect packets sent to and received from the access point.MIC prevents bit-flip attacks on encrypted packets. During a bit-flip attack, an intruder intercepts an encrypted message, alters it slightly, and retransmits it, and the receiver accepts the retransmitted message as legitimate.Note MIC is supported automatically by the client adapter’s driver, but it must be enabled on the access point.Value: None, MMH, or MichaelMessage Integrity Check DescriptionNone MIC is disabled.MMH MIC is enabled and is being used with CKIP.Michael MIC is enabled and is being used with WPA and TKIP.Current Link Speed The rate at which your client adapter is currently transmitting data packets.Value: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 MbpsChannel The channel that your client adapter is currently using for communications. This field displays “Scanning” while the client adapter searches for a channel.Value: Dependent on radio band and regulatory domainNote Refer to the Channel parameter in Table 5-3 for information on selecting the channel for your client adapter.Note Refer to Appendix D for a list of channel identifiers, channel center frequencies, and regulatory domains for each channel.Frequency The radio frequency that your client adapter is currently using for communications. This field displays “Scanning” while the client adapter searches for a frequency. Value: Dependent on radio band and regulatory domainNote Refer to the Wireless Mode parameter in Table 5-3 for information on selecting the frequency for your client adapter.Channel Set The regulatory domain for which your client adapter is currently configured. This value is not user selectable.Value: Americas, AMEA, Japan, or Rest of WorldTable 7-4 Advanced Client Adapter Status (continued)Status Description

BETA DRAFT - CISCO CONFIDENTIAL7-10Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsViewing Statistics for Your Client AdapterViewing Statistics for Your Client AdapterADU enables you to view statistics that indicate how data is being received and transmitted by your client adapter.To view your client adapter’s statistics, open ADU; then click the Diagnostics tab. The Cisco Aironet Desktop Utility (Diagnostics) screen appears (see Figure 7-4).Figure 7-4 Cisco Aironet Desktop Utility (Diagnostics) ScreenThis screen displays basic transmit and receive statistics for your client adapter. The statistics are calculated on a relative or cumulative basis as specified by the Data Display parameter and are continually updated at the rate specified by the Refresh Interval parameter. Instructions for changing the Data Display and Refresh Interval settings are provided in Table 7-2.Table 7-5 describes each statistic that is displayed for your client adapter.Table 7-5 Basic Client Adapter StatisticsStatistic DescriptionTransmit StatisticsMulticast Packets The number of multicast packets that were transmitted successfully.Broadcast Packets The number of broadcast packets that were transmitted successfully.Unicast Packets The number of unicast packets that were transmitted successfully.Total Bytes The number of bytes of data that were transmitted successfully.

BETA DRAFT - CISCO CONFIDENTIAL7-11Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 7 Performing Diagnostics Viewing Statistics for Your Client AdapterClick Advanced Statistics if you want to view additional statistics for your client adapter. The Advanced Statistics screen appears (see Figure 7-5). Figure 7-5 Advanced Statistics ScreenTable 7-6 interprets each element of the Advanced Statistics screen.Receive StatisticsMulticast Packets The number of multicast packets that were received successfully.Broadcast Packets The number of broadcast packets that were received successfully.Unicast Packets The number of unicast packets that were received successfully.Total Bytes The number of bytes of data that were received successfully.Table 7-5 Basic Client Adapter Statistics (continued)Statistic Description

BETA DRAFT - CISCO CONFIDENTIAL7-12Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsViewing Statistics for Your Client AdapterTable 7-6 Advanced Client Adapter StatisticsStatus DescriptionTransmit StatisticsFrames Transmitted OK The number of frames that were transmitted successfully.Frames Retried The number of frames that were retried.Frames Dropped The number of frames that were dropped due to errors or collisions.No ACK Frames The number of transmitted frames that did not have their corresponding Ack frame received successfully.CTS Frames The number of clear-to-send (CTS) frames that were transmitted in response to a successfully received RTS frame.No CTS Frames The number of frames for which no CTS frame was received in response to an RTS frame.Beacons The number of beacon frames that were transmitted successfully (in ad hoc mode only).RTS Frames The number of request-to-send (RTS) frames that were transmitted successfully.Retried Data Frames The number of normal data frames that were retransmitted.Retried RTS Frames The number of request-to-send (RTS) frames that were retransmitted.Frames Dropped The number of frames that failed to be transmitted successfully after exhausting the maximum number of retries.ACK Frames The number of transmitted frames that had their corresponding Ack frame received successfully.Receive StatisticsBeacons Received The number of beacon frames that were received successfully.Frames Received OK The number of all frames that were received successfully.Frames Received with Errors The number of frames that were received with an invalid checksum.Encryption Errors The number of frames that were received with encryption errors.Duplicate Frames The number of duplicate frames that were received successfully.CTS Frames The number of clear-to-send (CTS) frames that were received in response to an RTS frame.Authentication Time-Out The number of times the client adapter tried to authenticate to an access point but was unable to because the access point did not respond fast enough (timed out).Standard MIC Errors The number of frames that were discarded due to an incorrect message integrity check (MIC) value.Standard MIC Okay The number of frames that were received with the correct message integrity check (MIC) value.CRC Errors The number of cyclic redundancy check (CRC) errors detected in the data portion of the frame.

BETA DRAFT - CISCO CONFIDENTIAL7-13Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 7 Performing Diagnostics Viewing Statistics for Your Client AdapterClick OK to close the Advanced Statistics screen.AP Mismatches The number of times the client adapter tried to associate to an access point but was unable to because the access point was not the adapter’s specified access point.Note Refer to the Specified Access Point 1- 4 parameter on page 5-10 for information on specifying access points.Data Rate Mismatches The number of times the client adapter tried to associate to an access point but was unable to because the adapter’s data rate was not supported by the access point.Note Refer to the Wireless Mode parameter in Table 5-3 for information on supported data rates.Association Time-Out The number of times the client adapter tried to associate to an access point but was unable to because the access point did not respond fast enough (timed out).CKIP MIC Errors The number of frames that were discarded due to an incorrect message integrity check (MIC) value when CKIP was being used.Note This field is displayed only if MIC is enabled on the access point.CKIP MIC Okay The number of frames that were received with the correct message integrity check (MIC) value when CKIP was being used.Note This field is displayed only if MIC is enabled on the access point.Authentication Rejects The number of times the client adapter tried to authenticate to an access point but was rejected.Association Rejects The number of times the client adapter tried to associate to an access point but was rejected.Table 7-6 Advanced Client Adapter Statistics (continued)Status Description

BETA DRAFT - CISCO CONFIDENTIAL7-14Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 7 Performing DiagnosticsViewing Statistics for Your Client Adapter

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL8-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-018Using the Aironet System Tray Utility (ASTU)This chapter explains how to use the Aironet System Tray Utility (ASTU) to access status information about your client adapter and perform basic tasks.The following topics are covered in this chapter:•Overview of ASTU, page 8-2•The ASTU Icon, page 8-2•Tool Tip Window, page 8-3•Pop-Up Menu, page 8-5

BETA DRAFT - CISCO CONFIDENTIAL8-2Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU)Overview of ASTUOverview of ASTUASTU is an optional application that provides a small subset of the features available through ADU. Specifically, it enables you to access status information about your client adapter and perform basic tasks. ASTU is accessible from an icon in the Windows system tray, making it easily accessible and convenient to use. The ASTU icon appears only if a client adapter is installed in your computer.ASTU provides information and options in the following ways:•In the appearance of the icon itself•Through a tool tip window that appears when you hover the cursor over the icon•Through a pop-up menu that appears when you right-click the iconThe ASTU IconThe appearance of the ASTU icon indicates the connection status of your client adapter. ASTU reads the client adapter status and updates every 1 to 5 seconds, depending on the value entered for the Refresh Interval on the Display Settings screen. Table 8-1 interprets the different appearances of the ASTU icon.Note Windows 2000 and XP may display their own wireless network connection status icon in the system tray. Cisco recommends that you turn off the Windows icon and use the ASTU icon to monitor your wireless connection.Table 8-1 Interpreting the ASTU IconIcon DescriptionThe client adapter’s radio is turned off.The client adapter is not associated to an access point.The client adapter is associated to an access point, but the user is not authenticated.The client adapter is associated to an access point, and the link quality is excellent or good.The client adapter is associated to an access point, and the link quality is fair.The client adapter is associated to an access point, and the link quality is poor.

BETA DRAFT - CISCO CONFIDENTIAL8-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU)Tool Tip WindowConnection status The operational mode of your client adapter.Value: Not Associated, Associated, Authenticating, Authenticated, Authentication Failed, Authentication Failed RetryingConnection Status DescriptionNot Associated The client adapter has not established a connection to an access point.Associated The client adapter has established a connection to an access point.Authenticating The client adapter is associated to an access point, and the EAP authentication process has begun but not yet succeeded.Authenticated The client adapter is associated to an access point, and the user is EAP authenticated.Authentication Failed The client adapter is associated to an access point, but the user has failed to EAP authenticate.Authentication Failed Retrying The client adapter is associated to an access point, the user has failed to EAP authenticate, but another authentication attempt is being made.Link quality The client adapter's ability to communicate with the access point, which is determined by the combined result of the adapter's signal strength and signal quality.Value: Excellent, Good, Fair, Poor, or No LinkLink speed The rate at which your client adapter is currently transmitting data packets.Value: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 MbpsClient adapter type A description of your client adapter.Client adapter IP address The IP address of your client adapter.Table 8-2 Tool Tip Window Elements (continued)Status Element Description

BETA DRAFT - CISCO CONFIDENTIAL8-5Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU) Pop-Up MenuPop-Up MenuWhen you right-click the ASTU icon, the ASTU pop-up menu appears (see Figure 8-2).Figure 8-2 ASTU Pop-Up MenuThe following sections describe each ASTU pop-up menu option.Note If your system administrator used an administrative tool to deactivate certain ASTU menu options, these options do not appear in the menu and therefore cannot be selected.HelpThis option enables you to access the online help.ExitThis option closes ADU and ASTU.Note To reactivate ADU, double-click the Aironet Desktop Utility icon on your computer desktop. To reactivate ASTU, select the Enable Tray Icon option from ADU’s Action drop-down menu.Open Aironet Desktop UtilityThis option activates ADU. It is available only if ADU was installed.Note You can also activate ADU by double-clicking the ASTU icon.

$BETA DRAFT - CISCO CONFIDENTIAL8-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU)Pop-Up MenuTroubleshootingThis option activates the troubleshooting utility, which enables you to identify and resolve configuration and association problems with your client adapter. Refer to the “Using the Troubleshooting Utility” section on page 10-3 for detailed instructions on using this utility.PreferencesWhen you select this option, the Aironet System Tray Utility Preferences screen appears (see Figure 8-3).Figure 8-3 Aironet System Tray Utility Preferences ScreenThis screen enables you to determine when ASTU runs and to select the options that appear on the ASTU pop-up menu. Follow the steps below to make your selections.Step 1 If you want ASTU to run automatically when Windows starts, make sure the Run the program automatically when Windows starts check box is checked. Otherwise, uncheck this check box.Note If you do not select this option and later want to run ASTU, you must use Windows Explorer to find the path where the ASTU software is installed. (The default location is C:\Program Files\Cisco Systems\Aironet Client Monitor.) Then double-click ACUMon.exe.$

BETA DRAFT - CISCO CONFIDENTIAL8-10Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU)Pop-Up MenuConnection Status The operational mode of your client adapter.Value: Not Associated, Associated, Authenticating, Authenticated, Authentication Failed, Authentication Failed RetryingConnection Status DescriptionNot Associated The client adapter has not established a connection to an access point.Associated The client adapter has established a connection to an access point.Authenticating The client adapter is associated to an access point, and the EAP authentication process has begun but not yet succeeded.Authenticated The client adapter is associated to an access point, and the user is EAP authenticated.Authentication Failed The client adapter is associated to an access point, but the user has failed to EAP authenticate.Authentication Failed Retrying The client adapter is associated to an access point, the user has failed to EAP authenticate, but another authentication attempt is being made.Link Quality The client adapter’s ability to communicate with the access point, which is determined by the combined result of the adapter’s signal strength and signal quality.Value: Excellent, Good, Fair, or PoorSSID The name of the network to which your client adapter is currently associated. Note Refer to the SSID1 parameter in Table 5-2 for information on setting the client adapter’s SSID.Access Point Name The name of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode, the access point was configured with a name, and Aironet Extensions are enabled (on access points running Cisco IOS release 12.2(4)JA or greater).Access Point IP Address The IP address of the access point to which your client adapter is associated. It is shown only if the client adapter is in infrastructure mode, the access point was configured with an IP address, and Aironet Extensions are enabled (on access points running Cisco IOS release 12.2(4)JA or greater).Note If Aironet Extensions are disabled, the IP address of the associated access point is shown as 0.0.0.0.Table 8-3 Connection Status Screen Elements (continued)Status Element Description

BETA DRAFT - CISCO CONFIDENTIAL8-11Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU) Pop-Up MenuLink Speed The rate at which your client adapter is currently transmitting data packets.Value: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 MbpsClient Adapter IP Address The IP address of your client adapter.Table 8-3 Connection Status Screen Elements (continued)Status Element Description

BETA DRAFT - CISCO CONFIDENTIAL8-12Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 8 Using the Aironet System Tray Utility (ASTU)Pop-Up Menu

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL9-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-019Routine ProceduresThis chapter provides procedures for common tasks related to the client adapter.The following topics are covered in this chapter:•Removing a Client Adapter, page 9-2•Client Adapter Software Procedures, page 9-3•Turning Your Client Adapter’s Radio On or Off, page 9-10

BETA DRAFT - CISCO CONFIDENTIAL9-2Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 9 Routine ProceduresRemoving a Client AdapterRemoving a Client AdapterFollow the instructions in this section to remove a PC-Cardbus card or PCI card from a computing device, when necessary.Caution These procedures and the physical connections they describe apply generally to conventional Cardbus slots and PCI expansion slots. In cases of custom or nonconventional equipment, be alert to possible differences in Cardbus slot and PCI expansion slot configurations.Removing a PC-Cardbus CardTo remove a PC-Cardbus card after it is successfully installed and configured (such as when your laptop is to be transported), completely shut down your computer and pull the card directly out of the Cardbus slot. When the card is reinserted and the computer is rebooted, your connection to the network should be re-established.Note If you need to remove your PC-Cardbus card but do not want to shut down your computer, double-click the Unplug or Eject Hardware icon in the Windows system tray, select the Cisco Aironet client adapter you want to remove under Hardware devices, click Stop, and click OK twice. Then pull the card directly out of the card slot.Removing a PCI CardBecause PCI client adapters are installed inside desktop computers, which are not designed for portable use, you should have little reason to remove the adapter. However, instructions are provided below in case you ever need to remove your PCI card.Step 1 Completely shut down your computer.Step 2 Remove the computer cover.Step 3 Remove the screw from the top of the CPU back panel above the PCI expansion slot that holds your client adapter.Step 4 Pull up firmly on the client adapter to release it from the slot and carefully tilt the adapter to slip its antenna through the opening near the slot.Step 5 Reinstall the screw on the CPU back panel and replace the computer cover.

BETA DRAFT - CISCO CONFIDENTIAL9-3Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 9 Routine Procedures Client Adapter Software ProceduresClient Adapter Software ProceduresThis section provides instructions for the following procedures:•Upgrading the client adapter software, page 9-3•Uninstalling the client adapter software, page 9-6•Finding the driver version, page 9-7•ADU procedures, page 9-7•ACM procedures, page 9-10Upgrading the Client Adapter SoftwareFollow the steps below to upgrade your Cisco Aironet CB21AG or PI21AG client adapter software to a more recent version using the settings that were selected during the last installation.Note If you want to upgrade your client adapter software using new settings, uninstall the previous installation (see the instructions on page 9-6); then install the new software (see the instructions on page 3-8).Step 1 Use Windows Explorer to find the Install Wizard file.Step 2 Double-click the file. The “Starting InstallShield Wizard” message appears followed by the Preparing Setup screen (see Figure 9-1) and the Previous Installation Detected screen (see Figure 9-2).Figure 9-1 Preparing Setup Screen

BETA DRAFT - CISCO CONFIDENTIAL9-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 9 Routine ProceduresClient Adapter Software ProceduresFigure 9-2 Previous Installation DetectedStep 3 Select Update the previous installation and click Next. The Setup Status screen appears (see Figure 9-3).

BETA DRAFT - CISCO CONFIDENTIAL9-5Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 9 Routine Procedures Client Adapter Software ProceduresFigure 9-3 Setup Status ScreenThe upgrade process begins, and you are notified as each software component is reinstalled.Note This process may take several minutes.Step 4 When the InstallShield Wizard Complete screen appears (see Figure 9-4), select Yes, I want to restart my computer now and click Finish.

BETA DRAFT - CISCO CONFIDENTIAL9-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 9 Routine ProceduresClient Adapter Software ProceduresFigure 9-4 InstallShield Wizard Complete ScreenThe client adapter has been upgraded.Uninstalling the Client Adapter SoftwareThis section provides instructions for uninstalling the software for your Cisco Aironet CB21AG or PI21AG client adapter. This procedure is necessary if you want to remove installed client adapter software from your computer or downgrade to previous versions.Note If you want to downgrade to earlier versions of client adapter software, follow the steps below to uninstall the current software. Then install the older software.Note When you uninstall the client adapter software, any existing profiles are removed. If you want to save your profiles for later use, follow the instructions in Chapter 4 to export your profiles before uninstalling the software.

BETA DRAFT - CISCO CONFIDENTIAL9-7Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 9 Routine Procedures Client Adapter Software ProceduresStep 1 Perform one of the following:•If you want to remove the client adapter from your computer, shut down your computer, remove the client adapter, and reboot your computer.•If you want to leave your client adapter inserted in your computer, go to Step 2.Step 2 Use Windows Explorer to find the Install Wizard file. Step 3 Double-click the file. The “Starting InstallShield Wizard” message appears followed by the Preparing Setup screen (see Figure 9-1) and the Previous Installation Detected screen (see Figure 9-2).Step 4 Select Uninstall the previous installation and click Next.Step 5 When prompted to confirm your decision, click OK. The process to uninstall the files begins.Note This process may take several minutes.Step 6 When prompted to uninstall the device driver, click Yes.Step 7 When the InstallShield Wizard Complete screen appears (see Figure 9-4), select Yes, I want to restart my computer now and click Finish.Step 8 If you did not remove the client adapter from your computer, the Found New Hardware Wizard screen appears after your computer reboots. Click Cancel.The client adapter software and its program folder have been uninstalled.Note This procedure does not remove the Install Wizard file. If you want to remove it from your computer, find the file using Windows Explorer and delete it.ADU ProceduresThis section provides instructions for the following procedures:•Opening ADU, page 9-7•Exiting ADU, page 9-8•Finding the version of ADU, page 9-8•Viewing client adapter information, page 9-9•Accessing online help, page 9-10Opening ADUTo open ADU, perform one of the following:•Double-click the Aironet Desktop Utility icon on your desktop.•Select Aironet Desktop Utility (ADU) from the folder in the Windows Start Menu that you chose during installation (the default location is Start > Program Files > Cisco Aironet > Aironet Desktop Utility).•Right-click the ASTU icon in the Windows system tray and select Open Aironet Desktop Utility.

BETA DRAFT - CISCO CONFIDENTIAL9-8Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 9 Routine ProceduresClient Adapter Software ProceduresExiting ADUTo exit ADU, select Exit from the Action drop-down menu (see Figure 9-5).Figure 9-5 Action Drop-Down MenuFinding the Version of ADUFollow the instructions in this section to find the version of ADU that is currently installed.Step 1 Open ADU.Step 2 Select the About Aironet Desktop Utility option from the Help drop-down menu. The About screen appears (see Figure 9-6).

BETA DRAFT - CISCO CONFIDENTIAL9-9Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 9 Routine Procedures Client Adapter Software ProceduresFigure 9-6 About ScreenViewing Client Adapter InformationTo view information about your client adapter, open ADU. Then click the Diagnostics tab and Adapter Information. The Adapter Information screen appears (see Figure 9-7).Figure 9-7 Adapter Information ScreenTable 9-1 interprets each element of the Adapter Information screen.

BETA DRAFT - CISCO CONFIDENTIAL9-10Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 9 Routine ProceduresTurning Your Client Adapter’s Radio On or OffClick OK to close the Adapter Information screen.Accessing Online HelpTo access ADU’s online help, open ADU. Then select the Aironet Desktop Utility Help option from the Help drop-down menu.ASTU ProceduresRefer to Chapter 8 for instructions on using ASTU.Turning Your Client Adapter’s Radio On or OffYour client adapter’s radio can be turned on or off. Turning the radio off prevents the adapter from transmitting RF energy. You might want to turn off the client adapter’s radio in the following situations:•You are not transmitting data and want to conserve battery power.•You are using a laptop on an airplane and want to prevent the adapter’s transmissions from potentially interfering with the operation of certain devices.When the radio is on, it periodically sends out probes even if it is not associated to an access point, as required by the 802.11 specification. Therefore, it is important to turn it off around devices that are susceptible to RF interference.Note Your client adapter is not associated while its radio is off.Table 9-1 Adapter InformationStatus DescriptionCard Name A description of your client adapter.MAC Address The MAC address assigned to your client adapter at the factory.Driver The filename and location of your client adapter’s driver.Driver Version The version of the NDIS device driver that is currently installed on your computer.Driver Date The date that your client adapter’s driver was created.Serial Number The serial number of your client adapter.Note The serial number appears only if the number has been programmed into your card.Manufacturer The manufacturer of your client adapter.Client Name The name your client adapter uses when it associates to an access point.Note Refer to the Client Name parameter in Table 5-2 for information on setting the client name.

BETA DRAFT - CISCO CONFIDENTIAL9-11Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-01Chapter 9 Routine Procedures Turning Your Client Adapter’s Radio On or OffNote If your client adapter’s radio is turned off before your computer enters standby or hibernate mode or before you reboot the computer, the radio remains off when the computer resumes. You must turn the radio back on to resume operation.You can use ADU or ASTU to turn the client adapter’s radio on or off. Follow the instructions below to use ADU or refer to the “Enable/Disable Radio” section on page 8-7 to use ASTU.If your client adapter’s radio is on, open ADU and select Disable Radio from the Action drop-down menu (see Figure 9-5) to turn off the radio.If your client adapter’s radio is off, open ADU and select Enable Radio from the Action drop-down menu (see Figure 9-5) to turn on the radio.

BETA DRAFT - CISCO CONFIDENTIAL9-12Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter 9 Routine ProceduresTurning Your Client Adapter’s Radio On or Off

CHAPTERBETA DRAFT - CISCO CONFIDENTIAL10-1Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration GuideOL-4211-0110TroubleshootingThis chapter provides information for diagnosing and correcting common problems that may be encountered when installing or operating the client adapter.The following topics are covered in this chapter:•Accessing the Latest Troubleshooting Information, page 10-2•Interpreting the Indicator LEDs, page 10-2•Troubleshooting the Client Adapter, page 10-3•Error Messages, page 10-11

BETA DRAFT - CISCO CONFIDENTIAL10-2Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter10 TroubleshootingAccessing the Latest Troubleshooting InformationAccessing the Latest Troubleshooting InformationThis chapter provides basic troubleshooting tips for your client adapter. For more up-to-date and complex troubleshooting information, refer to the TAC web site. To access this site, go to Cisco.com, click Technical Support > Hardware Support > Wireless Devices. Then select your product and Troubleshooting to find information on the problem you are experiencing.Interpreting the Indicator LEDsThe client adapter shows messages and error conditions through its two LEDs:•Link Integrity/Power LED (green)—This LED lights when the client adapter is receiving power and blinks slowly when the adapter is linked with the network.•Link Activity LED (amber)—This LED blinks quickly when the client adapter is receiving or transmitting data and blinks in a repeating pattern to indicate an error condition.Table 10-1 interprets the LED operating messages.Table 10-1 LED Operating MessagesGreen LED Amber LED ConditionOff Off Client adapter is not receiving power.Blinking slowly Off Client adapter is in power save mode.On Off Client adapter has awakened from power save mode.Alternating blink: Client adapter is scanning for a network.On OffOff OnBlinking slowly Blinking slowly Client adapter is associated to an access point.Blinking quickly Blinking quickly Client adapter is transmitting or receiving data while associated to an access point.

BETA DRAFT - CISCO CONFIDENTIAL10-4Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter10 TroubleshootingTroubleshooting the Client AdapterFigure 10-1 Troubleshooting Utility ScreenStep 2 Click Run Test. The utility performs the following series of seven tests to check the operation of your client adapter and to pinpoint specific problems if they exist:1. Driver installation test2. Card insertion test3. Card enable test4. Radio test5. Association test6. Authentication test7. Network testThe utility runs and then displays the results for each test (see Figure 10-2).

$BETA DRAFT - CISCO CONFIDENTIAL10-6Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide OL-4211-01Chapter10 TroubleshootingTroubleshooting the Client AdapterSaving the Detailed Report to a Text FileFollow the steps below to save the detailed troubleshooting report to your computer’s hard drive.Step 1 Click Save Report. The Save Report screen appears (see Figure 10-3).Figure 10-3 Save Report ScreenStep 2 Enter a name for the detailed report in the File name field. The report is saved as a *.txt file.Step 3 Use the Save in box at the top of the screen to specify the location on your computer’s hard drive where the file will be saved.Note The default location is the Logs folder in the directory where ADU is installed (for example, C:\Program Files\Cisco Aironet\Logs).Step 4 Click Save. The file is saved as a text file in the location specified.$

Cisco Systems 102051 802.11 a/g PCI Adapter User Manual winicgkhb

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