Microsoft KB Archive/221497

= RRAS: RIP Routing Stops When System Time Is Changed =

Article ID: 221497

Article Last Modified on 1/23/2007

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APPLIES TO


 * Microsoft Routing and Remote Access Service Update for Windows NT Server 4.0
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q221497



SYMPTOMS
When you set up a computer running Windows NT 4.0 as a routing information protocol (RIP) router and the system time is changed backward, RIP updates stop until the original time is reached again. This may cause the route to be invalid, and part or all of the network may not work for the time period the RIP updates are seized.

For example, if it is 2:00 A.M. and the time on the server is changed to 1:50 A.M., RIP updates stop and clients may be unable to gain access to parts of the network until the server reaches 2:00 A.M. again.



CAUSE
This behavior occurs because RIP routing uses absolute system time. When the time changes unexpectedly, the RIP routing service does not send updates.



Windows NT Server or Workstation 4.0
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/windows/servicepacks/ -or-


 * 152734 how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

Windows NT Server 4.0, Terminal Server Edition
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.



MORE INFORMATION
The system time change may be an effect of a daylight saving time adjustment or a time change made for any other reason.

Keywords: kbbug kbnofix KB221497

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