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Cisco Building Broadband Service Manager

Field Notice: FN - 62728 - U.S. Daylight Savings Time Policy Changes Effective March 2007 - for Building Broadband Solution Manager (BBSM)


March 9, 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

BB-SM-5.2SERVER300

BB-SM-5353HS-SVC

BB-SM-53HSSVRUPG=

BB-SM-HOTSPOTSVR10

BB-SM-HOTSPOTSVR11

BB-SM-HOTSPOTSVR52

BB-SM-HS11-UPG=

BB-SM-SERVER-300

BB-SM-SERVER-96

BB-SM-SERVER5.2

BB-SM-SERVER5.2-96

BB-SM-SERVER5.3

BB-SM5.3-CDBUNDLE=

BB-SM53HS-PMSOPTN

BB-SMHOTSPOTSVR10A

BBSM-52A-SVC

BBSM-HS-SVC

Problem Description

New U.S. Daylight Savings Times rules go into effect in March 2007. Consequently, customers whose network components rely on the default U.S. summertime clock settings within Cisco IOS will be affected by the following problem.

For operating systems that have not been updated with the new U.S. DST policy changes, timestamps will exhibit a one hour time clock offset lasting three weeks beginning at 2:00 A.M. on the second Sunday in March of 2007. They will also exhibit a one hour time clock offset lasting one week beginning at 2:00 A.M. on the first Sunday in November.

For Example:

Display(s) will be off by one hour.

Detail Recording will be off by one hour.

System logs will be off by one hour.

If used, backups or scheduled tools will be off by one hour.

Background

On August 8, 2005, the Energy Policy Act of 2005 (H.R.6.ENR), was signed into law. Section 110 of this Act modified the time change dates for Daylight Saving Time (DST) in the U.S.

Beginning in March of 2007, DST will begin on the second Sunday of March and end the first Sunday of November.

For 2007 and beyond, the daylight saving time period will be:

2:00 A.M. on the second Sunday in March

to

2:00 A.M. on the first Sunday in November

For more information on the Energy Policy Act of 2005, see H.R. 6. (See Section 110)

Problem Symptoms

Impact to Networking Systems

Networking systems often make use of local time to mark logs, as well as to schedule certain events, credit card processing and integration with property management systems, or the beginning or end of a time-based access codes. In addition, inconsistencies between time zone definitions may impact event correlation systems.

Workaround/Solution

Download the TimeZone Editor (TZEDIT.exe) from the Microsoft Daylight Saving Time Help and Support Center and configure Daylight Saving Time Dates for your timezone.

See the following knowledgebase article for more information.

How to configure daylight saving time for the United States in 2007

To verify the changes by using the Date and Time item in Control Panel, follow these steps:

  1. Click Start, click Run, type control timedate.cpl,,/Z, and then press ENTER.

  2. Click the Time Zone tab, click to select the (GMT-08:00 Pacific Time (US & Canada) time zone, and then click Apply.

  3. Click the Date & Time tab.

  4. Set the date and time to one minute before the start of DST. For example, change the date and time to March 11, 2007 at 1:59 A.M.

  5. Wait one minute. Confirm that the clock moves to 3:00 A.M. instead of 2:00 A.M.

  6. Set the date and time to one minute before the end of DST. For example, change the date and time to November 4, 2007 at 1:59 A.M.

  7. Wait one minute. Confirm that the clock moves to 1:00 A.M. instead of 2:00 A.M.

  8. Set the date and time back to the correct setting.

BBSM uses the time provided by the operating system. The customer needs to follow the instructions specified in the following Microsoft link for Windows 2000 OS - Daylight Saving Time Help and Support Center.

It is recommended to use tzedit.exe utility to modify time zone settings as mentioned in the Microsoft site How to configure daylight saving time for the United States in 2007.

We have tested this tzedit utility and the tzedit procedure seems to be a straightforward and simple process.

U.S. summertime clock settings within Cisco IOS Should be changed to Cisco BBSM appliances.

Revision History

Revision

Date

Comment

1.0

09-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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