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Cisco Performance Visibility Manager

Field Notice: FN - 62744 - U.S. Daylight Savings Time Policy Changes Effective March 2007 - for Cisco Performance Visibility Manager (PVM)


March 7, 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

Product

PVM - 1

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.

Cisco PVM uses components that have built in mechanisms to automatically change the times, based on current United States rules for Daylight Savings Time. 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.

Problem Symptoms

Without the undertaking of the steps described in this notice, the potential problem is that scheduled reporting tasks in Cisco PVM 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

  1. Shut down PVM and ensure that all PVM processes are terminated.

  2. Download and install the OS patch for DST.

    For users with RH AS/ES 3, refer to the FAQ at the Red Hat Knowledgebase - Article 9950.

    For users with RH AS/ES 4, refer to the FAQ at the Red Hat Knowledgebase - Article 9951.

    Follow the instructions to update the OS.

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

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

    2. Follow the instructions included with the JDK patch and install it on the server running Cisco PVM. There are two JRE's deployed as part of Cisco PVM and their locations are listed below.

      Update both, using the instructions listed on the Sun Microsystems website, as "pvmadm" user.

      i. $PVM_BASE/j2sdk142/jre/bin/java

      ii. $PVM_BASE/reportmgr/AcServer/jdk142/jre/bin/java

  4. Cisco PVM provides the user with the ability to schedule report jobs. These report jobs have a dependency on time zone information. For the new Daylight Savings Times, reports will run one hour earlier or later than the time shown in the Scheduled Jobs GUI. There are currently no patches available for this problem. Workaround descriptions are provided below:

    1. Between 2:00 A.M. March 11, 2007 and 2:00 A.M. April 2, 2007, scheduled jobs will run one hour earlier. Users are advised to change the scheduled run times accordingly. For example, if you want a job to run at 4:15 P.M. on March 11, schedule it to run at 3:15 P.M. on March 11.

    2. Between 2:00 A.M. October 28, 2007 and 2:00 A.M. November 4, 2007, scheduled jobs will run one hour later. Users are advised to change the scheduled run times accordingly. For example, if you want a job to run at 4:15 P.M. on October 29th, schedule it to run at 5:15 P.M. on October 29th.

    3. For the DST times per the old rule (2:00 A.M. April 2, 2007 to 2:00 A.M. October 28, 2007), no changes are required, and the scheduled jobs run at the appointed hour. For example, if you want a job to run at 4:15 P.M. on May 15, schedule it to run at 4:15 P.M. on May 15.

Revision History

Revision

Date

Comment

1.0

07-MAR-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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