Field Notice: FN - 62902 - New Zealand Daylight Saving Time Policy Changes Effective September 2007 - for Cisco Unified Application Environment (CUAE)

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September 6, 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.

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Products Affected

Products Affected	Comments
CallMgr XML SDK	Release 2.4(x)

 

Problem Description

The operating systems of most Cisco products that support Daylight Saving Time (DST) have built in mechanisms to automatically change the times, based on current user-selected rules. Once the new DST is implemented, the time on devices that maintain time zone information will continue to change according to the old method, unless changes are made.

Background

On April 30, 2007, Hon Rick Barker, Minister of Internal Affairs, announced a three week extension to the period of daylight saving. Daylight saving now runs from the last Sunday in September until the first Sunday in April.

Table 1 - Summary of changes to Daylight Saving Time

Event	Prior to 2007	Year 2007 and After
Start	First Sunday in October	2:00 A.M. on September 30, 2007 (Last Sunday in September)
End	Third Sunday in March	3:00 A.M.on April 6, 2008 (First Sunday in April)

 

Problem Symptoms

Without the undertaking of the steps described in this notice, the potential problem is that the system time and all timestamps will be incorrect by an hour starting on the last Sunday in September and ending on the first Sunday in October, and again for the third Sunday in March until the first Sunday in April for the year 2007 and beyond.

This can have an impact on any event correlation activities that are performed as part of normal operations, troubleshooting, and monitoring.

For example, for devices where logs may be captured, correlated, and stored for future reference, this time change could render them incorrect for situations where they need to be recalled to rebuild a sequence of events. The incorrect timestamps may not be an issue for events that get immediate action, but future reference back to these events would reference incorrect times.

In addition, any device with time based controls and activities, such as authentication servers, synchronization activities, and scheduled events, such as batch jobs, timed backups, or automated scripts, would be impacted.

Workaround/Solution

The Cisco Unified Application Environment software does not need updates to correct for the new Daylight Saving Time changes. However, the appropriate patches for Microsoft Windows 2003 must be applied.

Cisco Unified Application Environment release 2.4 uses the same version of Windows 2003 that is used for Cisco Unified Communication Manager. Registered users may obtain Windows 2003 Operating System software from the Unified Communications Manager & Voice Apps Crypto Software Downloads (registered customers only) page.

Download the files:

win-OS-Upgrade-K9.2003-1-2a-sr2.exe

win-OS-Upgrade-K9.2003-1-2a-sr2-Readme.html

Follow the directions in the win-OS-Upgrade-K9.2003-1-2a-sr2-Readme.html file to install the update.

Revision History

Revision	Date	Comment
1.0	06-SEP-2006	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:

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

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