User's Manual Part 2

BETA DRAFT - CISCO CONFIDENTIAL
9-8
Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows
OL-1394-03
Chapter 9 Troubleshooting
Troubleshooting the Client Adapter
• Follow the instructions in the previous section to resolve any resource conflicts. If you are using
Windows NT, you may also want to try disabling the Ethernet port.
• If the client adapter still fails to establish contact, refer to the “Obtaining Technical Assistance”
section in the Preface for technical support information.
Problems Authenticating to an Access Point
If your client adapter is a 40-bit card and LEAP or EAP 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 static 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.
Losing Association Upon Resuming from Suspend Mode
(Windows NT and Mini PCI Card Only)
Because Windows NT does not support resuming of mini PCI cards, your client adapter loses its
association to an access point upon resuming from suspend mode. If this occurs, restart your client
adapter to reassociate.
Parameters Missing from ACU Properties Screens
If some parameters are grayed out on the ACU Properties screens, your system administrator may have
used an auto installer to deactivate these parameters. In this case, these parameters are not available for
you to set.