Field Notice: FN - 62699 - U.S. Daylight Savings Time Policy Changes Effective March 2007 - for Cisco Voice Provisioning Tool

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Updated:October 17, 2007
Document ID:FN62699

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Revised October 17, 2007

February 12, 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

VPT

Problem Description

Daylight Savings Time changes have been mandated by the Energy Policy Act of 2005 (H.R.6.ENR), Section 110. These changes will go into effect in March, 2007.

The Operating Systems of most Cisco products that support Daylight Savings Time have built in mechanisms to automatically change the times, based on current United States rules. Once the new Act is implemented, the time on devices that maintain time zone information will continue to change according to the old rules, unless changes are made.

Background

On August 8, 2005, President Bush signed into law the Energy Policy Act, which extends Daylight Saving Time (DST) by four weeks from the second Sunday of March to end on the first Sunday of November. The Secretary of Energy will report the impact of this change to Congress, and then Congress retains the right to resume the 2005 Daylight Saving Time schedule once the Department of Energy study is complete. This law takes effect March 1, 2007.

Table 1 Summary of changes to Daylight Savings Time

Event

Prior to 2007

2007 and After

Start

First Sunday in April

Second Sunday in March

End

Last Sunday in October

First Sunday in November

The Energy Policy Act of 2005, bill number H.R.6.ENR, can be found at the Library of Congress - Thomas Home website. Search for "Daylight Savings" to find the Act in various stages.

Problem Symptoms

Without the undertaking of the steps described in this notice, the potential problem is that scheduled tasks in Cisco Voice Provisioning Tool will execute at the wrong time. Additionally, the timestamps in log files will be incorrect. This can have an impact on any event correlation activities that are performed as part of normal operations, troubleshooting, and monitoring.

Workaround/Solution

Cisco Media Convergence Servers

  1. The DST fix for Cisco Defect id CSCsf07541 has been integrated into various versions of the Cisco MCS OS. Download OS versions 2000.4.2sr16, 2000.4.3aSR9 or 2000.4.4aSR10 or later from the CallManager & Voice Apps Crypto Software page (registered customers only) . (Some releases may be in the archives at http://www.cisco.com/cgi-bin/tablebuild.pl/cmva-3des-archive (registered customers only) ).

  2. Install Java Development Kit patch for US 2007 DST changes:

    - Download the "JDK US DST Timezone Update Tool - 1.0.1" (or later version) from the Sun Microsystems Java SE Downloads website.

    - The patch is available as a zip file: tzupdater-1_0_1.zip - from the Java SE Downloads page.

    - Follow the instructions included with the JDK patch and install it on the server running Voice Provisioning Tool.

  3. Reboot the server.

Customer-Provided Servers running Windows 2003 Server

  1. Install Microsoft HotFix KB928388 which has the US DST changes for 2007 on the server running the Voice Provisioning Tool.

  2. Install Java Development Kit patch for US 2007 DST changes:

    - Download the "JDK US DST Timezone Update Tool - 1.0.1" from the Sun Microsystems Java SE Downloads website.

    - The patch is available as a zip file: tzupdater-1_0_1.zip - from the Java SE Downloads page.

    - Follow the instructions included with the JDK patch and install it on the server running Voice Provisioning Tool.

  3. Reboot the server.

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

CSCsf07541 (registered customers only)

MCS-OS Update needed for N America DST changes in 2007

CSCsh20360 (registered customers only)

Looping in System Date & Time due to Daylight saving correction.

CSCsd57985 (registered customers only)

DayLight savings working wrongly for 26-03-2006 without DayLight Patch.

CSCsh91735 (registered customers only)

MCS-OS Pick up KB931836: February 2007 cumulative TZ Update

Revision History

Revision

Date

Comment

1.1

17-OCT-2007

Added DDTS CSCsd57985, CSCsh20360 and CSCsh91735. Updated MCS OS update versions and added Archive link to Workaround/Solution section.

1.0

12-FEB-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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