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Cisco ONS 15300 Series

Field Notice: FN - 62690 - U.S. Daylight Savings Time Policy Changes Effective March 2007 - ONG Optical Products


March 5, 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

ONS 15530 & 15540 - Pre 12.2(29)SV3

 

ONS - R4.x

All R4.x derived trains prior to that listed below.

ONS - R5.x

All R5.x derived trains prior to that listed below.

ONS - R6.x

All R6.x derived trains prior to that listed below.

ONS - R7.x

All R7.x derived trains prior to that listed below.

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 optical products that support Daylight Savings Time have built in mechanisms to automatically change the time based on the pre-Energy Act US dates. Once the new Act is implemented, the time on devices that maintain time zone information will continue to change according to those dates, unless changes are made. See below for the pre-Energy Act dates and the new dates.

Background

On August 8, 2005, President Bush signed into law the Energy Policy Act, which extends DST by four weeks from the second Sunday of March to 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 DST schedule once the Department of Energy study is complete. This law takes effect on March 1, 2007.

Event

Prior to 2007

Year 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. 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 the system time and all timestamps will be incorrect by an hour for three weeks in the spring and one week in the fall for year 2007 and beyond.

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

For example, where logs may be captured, correlated, and stored for diagnostic or billing purposes, these time changes could render them incorrect for situations where they need to be recalled to rebuild a sequence of events. Incorrect timestamps may not be an issue for events that receive immediate action, but where future reference back to these events is needed, incorrect times would be reported.

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, and so on, would be impacted.

Workaround/Solution

To comply with this government mandate, Cisco has begun to take the necessary steps to conform to the new US Daylight Savings Time standard that will begin in March 2007.

The intent of this document is to inform Cisco customers of the plan that Cisco is preparing in order to bring the Unified Communications applications and associated platforms into compliance with this new US government mandate.

The following releases have been updated to accommodate these changes and should be applied where deemed necessary.

Release

Platform(s)

Cisco.com Date

R4.1.82

15327, 15454, 15454E

2/22/2007

R5.08

15310, 15327, 15454 & 15600

October 2006

R6.22

15310, 15327, 15454, 15454E, 15600

July 2006

R6.24

15600

December 2006

R7.02

15310CL & MA, 15327, 15454 & E, 15600

10/12/2006

R7.03

15454, 15454E (MSTP Only)

October 2006

R7.04

15310CL & MA, 15327, 15454 & E, 15600

2/20/2007

R7.22

15310 & MA, 15327, 15454 & E 15600

2/28/2007

R8.0

15310CL & MA, 15454 & E, 15600 & SDH

2/15/2007

12.2(29)SV3

15530 & 15540

2/23/2007

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

CSCsd06997 (registered customers only)

Non-IOS Change in ENERGY POLICY ACT affects DST rules

CSCsg70355 (registered customers only)

IOS - Adopt new default summer-time rules from Energy Policy Act of 2005.

Revision History

Revision

Date

Comment

1.0

05-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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