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Cisco 2000 Series Wireless LAN Controllers

Field Notice: FN - 62795 - AP15xx Operating Software Release 4.0.206.0 is Configured with Certain Country Codes


May 1, 2007

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

Products Affected

Comments

AIR150U - AIR-LAP1505G-x-K9

X = Regulatory Domain version. Regulatory domain that is potentially impacted is -A. Not all customers with this Regulatory Domain are impacted. See Country Code list below.

AIR150U - AIR-LAP1510AG-x-K9

X = Regulatory Domain version. Regulatory domains that are potentially impacted are -E, -N, -P and -K. Not all customers with these Regulatory Domains are impacted. See Country Code list below.

AIRINFR - AIR-WLC4402-12-K9

AIRINFR - AIR-WLC4402-25-K9

AIRINFR - AIR-WLC4402-50-K9

AIRINFR - AIR-WLC2006-A-K9

AIRINFR - AIR-WLC2006-E-K9

AIRINFR - AIR-WLC2006-J-K9

AIRINFR - AIR-WLC2006-K9

AIRINFR - WS-C3750G-24WS-S25

AIRINFR - WS-C3750G-24WS-S50

AIRINFU - AIR-WLC2106-K9

AIRINFU - AIR-WLC4404-100-K9

AIRINFU - WS-SVC-WISM-1-K9=

AIRWLC - NM-AIR-WLC6-K9=

AIRWLC - NME-AIR-WLC12-K9=

AIRWLC - NME-AIR-WLC8-K9=

Problem Description

When an AP running version 4.0.206.0 is configured with certain Country Codes, the AP will fail after boot up such that it never becomes operational.

This problem happens when the AP is running version 4.0.206.0 and the Controller to which it will attach to is also running version 4.0.206.0.

The APs impacted by this are LAP1510AG and LAP1505G.

The Country Codes impacted are:

1505:

Australia

Brazil

Hong Kong

India

Korea

Mexico

New Zealand

Taiwan

1510:

Australia

Brazil

Bulgaria

Hong Kong

India

Japan

Korea

Mexico

New Zealand

Russian Federation

Taiwan

Background

An AP determines on which channels it is allowed to operate by looking up the values allowed for its configured Country Code in one of a set of channel tables.

In version 4.0.206.0, one particular channel table was erroneously defined. Any country code that pointed to this table was impacted. As a result, the AP would be unable to set its channels, and moved to an error state.

The AP, being unable to connect to the Controller, will eventually reboot and repeat its attempt to boot up.

Problem Symptoms

An impacted AP running version 4.0.206.0 will error during boot up and will not be able to become operational.

The AP will eventually revert to its previous image, which had become its backup image, and connect very briefly to the Controller. However, since the AP compares its image to the version on the Controller, if the Controller image remains 4.0.206.0, the AP will download that image and attempt to boot with it, repeating the process over again.

Workaround/Solution

The Controller code needs to be changed so that it is NOT using version 4.0.206.0.

Since the AP takes the image from the Controller when it connects, the AP code will be changed when it connects to the Controller.

The AP may use an image older than 4.0.206.0, but it is highly recommended that the image be upgrade to the most current version at this time - 4.0.217.0.

Follow these steps, If you have APs that are using version 4.0.206.0, to move to version 4.0.217.0:

1a. If you have high-volume traffic such as video running over the mesh, the upgrade can take a long time.

To mitigate this, you should turn off video traffic before you upgrade.

If your have cameras attached to the Ethernet connector of your APs, you can disable Ethernet Bridging on the APs to eliminate traffic from this source.

See the example below:

(The red outline is around the Ethernet Bridging check box)

fn62795_jhc42q.jpg

1b. Change the image on the Controller to 4.0.217.0.

See Example below:

fn62795_jh6dkr.jpg

c. Click on the "Download" button at the top left (off screen).

d. The APs will compare the image on the Controller to their Primary image.

e. Since the two images will be different, the AP will download the controller image and make that image its new Primary image.

f. The previous image will now become the Backup image.

g. Once your APs have upgraded, if you disabled Ethernet Bridging in step 1a, re-enable Ethernet bridging.

h. APs whose Primary image is 4.0.206.0 will eventually time out and make the Backup image (which is not 4.0.206.0) the Primary image

If you have APs that are using version 4.0.206.0 and are using a Country Code that is not on the impacted list, do not change your Country Code to one of the impacted countries.

If you do this, follow the steps outline above for upgrading your Controller to 4.0.217.0.

Note that the AP can only be upgraded or downgraded from release to release as per the following matrix.

If your AP is on release 3.1.x.x and you need to go to release 4.0.217.0, you need to first upgrade your Controller/AP to release 3.2.x.x.

fn62795_jh6dud.jpg

Revision History

Revision

Date

Comment

1.0

01-MAY-2007

Initial Public Release

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:

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