Cisco Aironet 1200 Series

August 2, 2005

Products Affected

Problem Description

If you set the GUI and CLI to the right antenna, all the power comes out the antenna marked left, and vice versa.

This creates installation problems on the connectorized RM22A when an external antenna is used with the product.

Background

Using firmware 12.2(04)JA, the antenna connectors are configured backwards in software.

Typically the right antenna, marked primary, is the active antenna by default. Unfortunately, using this version of code, the left antenna is the default primary, as the antenna control within GUI and CLI is backwards. When the unit is configured to use the right antenna, it will actually set the left one active, and vice versa.

Problem Symptoms

When using the AIR-RM22A 802.11a radio in an AP1200, the transmitted / received signal level observed may differ significantly from what is expected. Configuring the right antenna to be used, it is found that in fact the energy is being transmitted/ received via the left antenna, and vice versa.

Workaround/Solution

The workaround is to simply set the other antenna active in software. After the unit is upgraded to 12.3(07)JA or higher, it will go back to the correct way, so if the user has configured it backwards in software, it will need to reconfigured back to the correct orientation.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

• Open a service request on Cisco.com
• By email
• By telephone

Receive Email Notification For New Field Notices

Product Alert Tool - Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.