DOCUMENT:Q262479 08-MAY-2002 [winnt] TITLE :Tcpip.sys Does Not Free Unwanted Broadcast Packets PRODUCT :Microsoft Windows NT PROD/VER::2000,4.0 OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fix kbWin2000PreSP2Fix kbWin2000SP2Fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Windows 2000 Server ------------------------------------------------------------------------------- SYMPTOMS ======== A Perfmon analysis of pool nonpaged bytes shows a slow, steady increase that can result in a system hang after several days. Also, an analysis of the nonpaged pool tags shows NDPt as the largest consumer of nonpaged pool. CAUSE ===== Tcpip.sys does not free broadcast packets that the IP traffic filter driver does not want to forward. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, please see the following article in the Microsoft Knowledge Base: Q260910 How to Obtain the Latest Windows 2000 Service Pack Windows 2000 ------------ The English version of this fix should have the following file attributes or later: Date Time Version Size File name ----------------------------------------------------- 05/12/2000 06:31p 5.0.2195.2096 308,720 Tcpip.sys 05/12/2000 06:30p 5.0.2195.2096 16,208 Tdi.sys Windows NT 4.0 -------------- A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. 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/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: Date Time Size File name Platform ------------------------------------------------ 04/06/2000 09:44p 174,448 Tcpip.sys Intel 04/06/2000 09:44p 310,704 Tcpip.sys Alpha STATUS ====== Windows 2000 ------------ Microsoft has confirmed this to be a problem in Windows 2000. This problem was first corrected in Windows 2000 Service Pack 2. Windows NT 4.0 -------------- Microsoft has confirmed this to be a problem in Windows NT 4.0. MORE INFORMATION ================ To enable pool tagging, use Gflags.exe. Click to select the "Enable pool tagging" check box, and then restart the computer. After you restart the computer, use Poolmon.exe or "!poolused 2" in the kernel debugger to determine the high-consumption pool tags. Additional query words: ====================================================================== Keywords : kbWinNT400PreSP7Fix kbWin2000PreSP2Fix kbWin2000SP2Fix Technology : kbWinNTsearch kbWinNT400search kbwin2000Serv kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbwin2000ServSearch kbwin2000Search Version : :2000,4.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.