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Cisco Aironet 1200 Series

Field Notice: FN - 62387 - 802.11g Radio in AP1130 and AP1240 Loses Connectivity With Clients


April 20, 2006

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

  • AP1130

  • AP1240

Problem Description

This issue is caused by manufacturing process variations in one of the integrated circuits used in the access points.

The fix consists of a software change to a hardware configuration register which changes the RF parameters in the @ circuit sufficiently to insure that the circuit will continue to operate within the design specifications. This is not a user settable configuration register.

The problem only affects 1130 and 1240 series APs. It does not affect 1100 or 1200 series APs.

Background

There does not seem to be a specific combination of operations/environment that would cause the access point to get into this state. However, extreme temperatures seem to enhance the issue.

Problem Symptoms

The 2.4GHz radio in some AP1130 and AP1240 units produced after January 23, 2006 can in certain circumstances get into a state where all clients will be disassociated and the access point will no longer be able to communicate with the clients.

In addition to the date above, the following serial number ranges have been affected.

Date

Serial Number

Serial Number

01/23/06

FXX1003XXXX

FXX1004XXXX

01/28/06

FXX1005XXXX

-

02/06/06

FXX1006XXXX

-

02/13/06

FXX1007XXXX

-

02/21/06

FXX1008XXXX

-

02/27/06

FXX1009XXXX

-

03/04/06

FXX1010XXXX

-

03/13/06

FXX1011XXXX

-

03/20/06

FXX1012XXXX

-

Workaround/Solution

Upgrade to an IOS version with the CSCsd44941 fix.

12.3(02)JA06, 12.3(04)JA02, 12.3(07)JA03, 12.3(07)JX03, 12.3(08)JA, 12.3(08)JA01 or later.

For AP1130s/AP12340s in LWAPP modem, the WLC must be running 3.2.116.21 or later.

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.

DDTS

Description

CSCsd44941 (registered customers only)

802.11g radio in AP1130 and AP1240 loses connectivity with clients

Revision History

Revision

Date

Comment

1.0

20-APR-2006

Initial Public Release

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For More Information

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