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8-4
Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Linux
OL-1376-02
Chapter 8 Troubleshooting
Problems Authenticating to the Access Point
• Ensure that all parameters are set properly for both the client adapter and the access point. These
include the SSID, LEAP activation, WEP activation, network type, and channel.
• If the client adapter still fails to establish contact, refer to the “Obtaining Technical Assistance” in
the Preface for technical support information.
Problems Authenticating to the Access Point
If your client adapter is a 40-bit card and LEAP is enabled, the adapter can associate to but not
authenticate to access points using 128-bit encryption. To authenticate to an access point using 128-bit
encryption, you have two options:
• Purchase a 128-bit client adapter. This is the most secure option.
• Disable WEP for the client adapter and configure the adapter and the access point to associate to
mixed cells. This option presents a security risk because your data is not encrypted as it is sent over
the RF network.
Problems Connecting to the Network
After you have installed the appropriate driver and client utilities, contact your IS department if you have
a problem connecting to the network. Proxy server, network protocols, and further authentication
information might be needed to connect to the network.
Getting Help
You can access HTML browser-based online help for your client adapter by clicking the Help button in
any screen having one and selecting a web browser. Once you have selected a web browser, the ACU’s
online help pages are accessed. Follow these steps to access online help.
Step 1 From any screen having one, click the Help button. The acu screen appears (Figure 8-1).
Figure 8-1 The ACU Screen
Step 2
Enter the name of your HTML browser (for example Netscape, Lynx, Opera, or Mozilla) and click OK.
The browser opens and the Help Home Page appears (Figure 8-2).
- Guide for Linux 1
- CONTENTS 3
- Contents 4
- 5 Advanced Configuration 5-1 5
- 6 Diagnostics 6-1 5
- 7 Routine Procedures 7-1 5
- 8 Troubleshooting 8-1 6
- Japanese Translation D-7 7
- English Translation D-7 7
- Audience 10
- Organization 10
- Conventions 11
- Attention 12
- Avvertenza 12
- Advarsel 12
- Related Publications 13
- Obtaining Documentation 13
- Ordering Documentation 14
- Documentation Feedback 14
- Cisco.com 14
- Technical Assistance Center 15
- Cisco TAC Escalation Center 16
- Overview 17
- Terminology 18
- Parts of the Client Adapter 19
- Chapter 1 Overview 20
- Ad Hoc Wireless LAN 21
- Site Survey 22
- Preparing for Installation 25
- Safety Information 26
- Unpacking the Client Adapter 27
- System Requirements 27
- Site Requirements 28
- PCMCIA Installation 32
- Enter (Figure 3-3) 33
- Figure 3-7 Make All Screen 37
- Option 1 for Red Hat Systems 38
- Option 2 for Red Hat Systems 39
- Verifying Installation 41
- Inserting a PC Card 42
- Additional Procedures 44
- Opening the Client Utilities 46
- Selecting the Radio 47
- Enabling LEAP 52
- Using the Bcard Utility 53
- Finishing the Installation 54
- Enabling Security Features 55
- Server-Based Authentication 56
- Getting Started 56
- Changing the Password 56
- Entering a New WEP Key 57
- Selecting an Existing WEP Key 59
- Enabling WEP 59
- Message Integrity Check (MIC) 60
- Advanced Configuration 63
- Setting Enterprise Parameters 65
- Table 5-2 System Parameters 66
- Network Type Description 67
- Authentication Description 69
- Setting RF Network Parameters 71
- Data Rate Description 72
- Diagnostics 83
- Chapter 6 Diagnostics 85
- Receive Statistics 90
- Transmit Statistics 91
- Routine Procedures 93
- Ascertaining the ACU Version 94
- Selecting a Help Browser 95
- Loading New Firmware 95
- Uninstalling Manually 97
- Removing a PC Card 99
- Removing a PCI Client Adapter 99
- OL-1376-02 100
- Removing the Client Adapter 100
- Troubleshooting 101
- Using the Indicator LEDs 102
- Getting Help 104
- (Figure 8-3) 105
- Technical Specifications 107
- Power output 109
- Receiver sensitivity 109
- APPENDIX 113
- Channel Sets 114
- Translated Safety Warnings 117
- Warning for Laptop Users 119
- ¡Advertencia! 120
- Varning! 120
- Information 121
- Tested To Comply 122
- With FCC Standards 122
- FOR HOME OR OFFICE USE 122
- Canadian Compliance Statement 123
- Liechtenstein 124
- Japanese Translation 127
- English Translation 127
- GLOSSARY 129
- Glossary 130
- OL-1367-02 130
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