3Com 3CRWEASY96A manual Diagnosing Problems, Symptom Solutions

4 TROUBLESHOOTING

DIAGNOSING PROBLEMS

If you have difficulty with a 3Com Wireless LAN building-to-building bridge, try the solutions in the following table.

Symptom Solutions

Two bridges fail to communicate in ad hoc mode.

■Adjust the positions of the antennas to improve reception.

■To ensure correct operation in ad hoc mode, the settings on the two bridges must match exactly. Launch the bridge configuration management system and make sure that the Wireless LAN Service Area, channel selections, Data Preamble setting, and security settings are the same on both bridges.

The bridge fails to associate with an	■ Adjust the position of the antenna to improve reception.
access point.	■ Launch the bridge configuration and make sure the security
	settings, advanced performance settings, and access point
	privacy mode settings on the bridge match those on the
	access point.
	■ If the access point is from another manufacturer, try turning the
	Network Traffic Accelerator off and setting the Data Preamble
	to long.
	■ Using 128-bit Dynamic Security Link encryption, the bridge
	cannot associate with access points that are set to Require
	Windows user authentication, which requires clients to enter a
	user name and password every time they associate with the
	network. Make sure the access point does not require Windows
	user authentication.
	■ If the bridge is using an 18 dBi antenna, the FCC restricts the
	use of channels 12 and 13 to very reduced rates in the United
	States. Access points set to automatically select the best channel
	may occasionally select channel 12 or 13. To avoid
	interruptions, it is recommended that you set the access point
	to use a specific channel.
The 128-bit Dynamic Security Link setting	128-bit Dynamic Security Link is not supported in ad hoc mode.
does not work in ad hoc mode.	Use the 40-bit or 128-bit Shared Keys settings instead.

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