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Dynamic Host Routes Are Not Removed if EnablePMTUDiscovery Is Set to Zero

This article was previously published under Q326926
This article has been archived. It is offered "as is" and will no longer be updated.
Host routes may be dynamically added to your Windows 2000 routing table but may not ever be removed. The following registry key may have a EnablePMTUDiscover value of zero:
A host route is added to the Windows 2000 routing table if an ICMP redirect is received from the default gateway. Windows 2000 typically removes the host route after 10 minutes. However, if EnablePMTUDiscover has a value of zero, Windows 2000 never removes the host routes.

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version           Size     File name   -----------------------------------------------------------   19-Nov-2001  20:42  5.0.2195.4667     118,896  Afd.sys   23-Jul-2002  18:17  5.0.2195.4874     105,232  Msafd.dll           21-Jun-2002  14:09            3,584  Spmsg.dll           21-Jun-2002  14:10           44,544  Spuninst.exe        13-Jun-2001  02:05  5.0.2195.3727       3,856  Svcpack1.dll        23-Jul-2002  18:08  5.0.2195.5964     313,200  Tcpip.sys   31-Jul-2001  00:15  5.0.2195.3988      16,240  Tdi.sys   23-Jul-2002  18:17  5.0.2195.4874      17,680  Wshtcpip.dll        21-Jun-2002  14:10           10,240  Spcustom.dll     				

After you apply this hotfix, Windows 2000 deletes the host routes after 10 minutes.
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 Microsoft Windows 2000 Service Pack 4.
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server Product
For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:
296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot
For additional information about ICMP redirects, click the article number below to view the article in the Microsoft Knowledge Base:
195686 Explanation of ICMP Redirect Behavior

Identyfikator artykułu: 326926 — ostatni przegląd: 10/26/2013 17:23:30 — zmiana: 3.7

Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Professional Edition

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